1 Technical Requirements - Pacific Gas and Electric · Web viewThese material classifications shall define the valves, pipe, fittings, flanges, gaskets, and bolting to be used. Welded

PACIFIC GAS AND ELECTRIC COMPANY Technical Specifications: Appendix N1PURCHASE AND SALE AGREEMENT Simple Cycle (Combustion Turbine)

1. OVERALL FACILITY CONFIGURATION...............................................................11

1.1. Major Components.....................................................................................................................11

1.2. Balance of Plant Support Systems..............................................................................................11

2. SITE CONDITIONS.......................................................................................................13

2.1. Site Elevation and Barometric Pressure......................................................................................13

2.2. Temperatures..............................................................................................................................13

2.3. Precipitation, Wind, and Earthquake..........................................................................................13

3. CODES AND STANDARDS..........................................................................................13

3.1. State and Local Building Codes, Standards and Ordinances......................................................14

3.2. U.S. Government Codes, Ordinances, and Standards.................................................................14

3.3. American Society of Mechanical Engineers...............................................................................14

3.4. American National Standards Institute.......................................................................................15

3.5. Industry Standards......................................................................................................................16

3.6. Electric Utility Requirements.....................................................................................................17

4. TECHNICAL REQUIREMENTS.................................................................................17

4.1. System Descriptions...................................................................................................................19

4.2. Plant Identification System.........................................................................................................19

4.3. Supplier Factory Tests................................................................................................................20

4.4. Testing........................................................................................................................................21

4.5. Welding.......................................................................................................................................22

4.6. Lubrication..................................................................................................................................23

4.7. Consumables...............................................................................................................................23

All Source RFO: Revised 03-31-08 Page 1 of 186document.doc


5. OPERATIONAL REQUIREMENTS............................................................................23

6. MAJOR MECHANICAL EQUIPMENT AND SYSTEMS........................................24

6.1. Combustion Turbine...................................................................................................................24

6.1.1. Turbine Supervisory Instrumentation (TSI)........................................................25

6.1.2. Inlet Air Filter......................................................................................................25

6.1.3. Acoustic Enclosures............................................................................................26

6.1.4. Water Wash System............................................................................................27

6.1.5. Combustion Turbine Exhaust Duct.....................................................................27

6.1.6. Exhaust Stack......................................................................................................27

6.2 Lube and Control Oil Systems....................................................................................................27

6.3. Closed Cooling Water System (if needed).................................................................................28

6.4. Turning Gear...............................................................................................................................29

6.5. Pumps..........................................................................................................................................29

6.5.1. Pump Types.........................................................................................................30

6.5.2. General Design and Construction........................................................................30

6.5.3. Pump Characteristics...........................................................................................31

6.5.4. Fittings.................................................................................................................31

6.5.5. Bearings...............................................................................................................32

6.6. Piping..........................................................................................................................................32

6.6.1. Piping Materials..................................................................................................34

6.6.2. Pipe Velocities.....................................................................................................36

6.6.3. Pipe Hangers and Supports..................................................................................36

6.7. Valves.........................................................................................................................................37

6.7.1. Drain and Vent Valves and Traps.......................................................................38

6.7.2. Low-Pressure Water Valves................................................................................38

6.7.3. Instrument Air Valves.........................................................................................39

6.7.4. Non-Return Valves..............................................................................................39

6.7.5. Motor-Actuated Valves.......................................................................................39

6.7.6. Control Valves.....................................................................................................39

6.7.7. Safety and Relief Valves.....................................................................................42



6.7.8. Instrument Root Valves.......................................................................................42

6.7.9. Float-Operated Valves.........................................................................................42

6.7.10. High-Pressure Valves..........................................................................................43

6.8. Insulation and Freeze Protection.................................................................................................43

6.9. Tanks...........................................................................................................................................44

6.10. Heat Exchangers.........................................................................................................................44

6.11. Pressure Vessels..........................................................................................................................45

6.12. Fuel Gas Supply System.............................................................................................................45

6.13. Water Source and Treatment System..........................................................................................47

6.14. Demineralized Water..................................................................................................................47

6.15. Wastewater Treatment and Discharge........................................................................................48

6.16. Sump Pumps...............................................................................................................................49

6.17. Potable Water..............................................................................................................................49

6.18 Fire Protection System................................................................................................................50

6.18.1. General................................................................................................................50

6.18.2. Seller’s Responsibility.........................................................................................50

6.18.3. Fire Protection Master Plan and Design Basis....................................................51

6.18.4. Codes, Standards and Recommendations............................................................52

6.18.5. Other Codes and Standards.................................................................................54

6.18.6. Materials, Equipment and System Components Listings and Approvals...........55

6.18.7. Fire Protection Water Supply and Water Storage...............................................55

6.18.8. Fire Pumps...........................................................................................................56

6.18.9. Underground Fire Protection Water Main System and Hydrants.......................58

6.18.10. Fire Hydrants.......................................................................................................59

6.18.11. Fire Protection and Detection System.................................................................59

6.19 Fire Detection System.................................................................................................................63

6.20 Compressed Air System..............................................................................................................65

6.21. Cranes, Hoists, and Trolleys.......................................................................................................66

6.22. Heating Ventilating and Air Conditioning..................................................................................67



6.22.1. System Function..................................................................................................68

6.22.2. Buildings and Enclosures....................................................................................68

6.22.3. Air Conditioning System.....................................................................................68

6.22.4. Battery Room Exhaust System............................................................................69

6.22.5. Design Parameters...............................................................................................69

6.22.6. Standards.............................................................................................................70

7. MAJOR ELECTRICAL EQUIPMENT AND SYSTEMS..........................................71

7.1. Frequency and Voltage Limits....................................................................................................72

7.1.1. Frequency............................................................................................................72

7.1.2. Voltage................................................................................................................72

7.2. Auxiliary Equipment...................................................................................................................72

7.3. Synchronous Generator...............................................................................................................72

7.3.1. Construction of the Generator.............................................................................73

7.3.2. Accessories..........................................................................................................74

7.3.3. Generator Neutral Grounding..............................................................................74

7.3.4. Excitation Systems..............................................................................................74

7.4. Isolated Phase Bus Ducts, Non-Segregated Phase Bus Ducts, and Generator Circuit Breakers 75

7.5. Plant Electrical Auxiliary Systems.............................................................................................76

7.6. Electrical System Design and Equipment Requirements...........................................................77

7.7. Automatic Generation Control Terminal....................................................................................78

7.8. Generator Bus.............................................................................................................................80

7.9. Neutral Grounding Equipment....................................................................................................80

7.10. GSU Transformer Bank..............................................................................................................81

7.10.1. GSU Cooling System..........................................................................................82

7.10.2. Generator Breakers..............................................................................................82

7.11. Unit Auxiliary Transformer........................................................................................................82

7.12. System Protection.......................................................................................................................83

7.12.1. Generator Protective Relaying............................................................................85

7.12.2. Generator Bus and Transformer Protective Relaying.........................................86



7.12.3. Main Power Transformer Protective Relaying....................................................86

7.12.4. Auxiliary System Relaying.................................................................................86

7.12.5. Major Interlocks..................................................................................................86

7.12.6. Lockout Relay Actions........................................................................................87

7.12.7. Protective Relays.................................................................................................87

7.13. Medium-Voltage Bus Duct.........................................................................................................87

7.13.1. Non-Segregated Phase Bus Duct/Cable Bus (as required)..................................87

7.13.2. Bus Ratings..........................................................................................................87

7.13.3. Cable Bus Duct....................................................................................................88

7.13.4. Bus Ratings..........................................................................................................88

7.13.5. Conductors...........................................................................................................88

7.13.6. Medium-Voltage System.....................................................................................88

7.14. Low-Voltage System..................................................................................................................90

7.14.1. System Configuration..........................................................................................90

7.14.2. Transformers.......................................................................................................90

7.15. Switchgear..................................................................................................................................90

7.16. Motor Control Centers................................................................................................................91

7.16.1. Operational Requirements...................................................................................92

7.16.2. Protection.............................................................................................................92

7.17. Alternate Power Source..............................................................................................................92

7.18. Essential Service AC System......................................................................................................92

7.18.1. Uninterruptible Power Supply.............................................................................92

7.18.2. Rectifier...............................................................................................................93

7.18.3. Inverter................................................................................................................93

7.18.4. Static Transfer Switch.........................................................................................93

7.18.5. Essential Service 120V AC Distribution Panelboard..........................................94

7.19. Essential Service DC System......................................................................................................94

7.19.1. Batteries...............................................................................................................94

7.19.2. Battery Accessories.............................................................................................95

7.19.3. Battery Chargers..................................................................................................95

7.20. Motors.........................................................................................................................................95



7.20.1. 4000V Motors......................................................................................................96

7.20.2. Low-Voltage Motors...........................................................................................98

7.21. Standby Power Generator...........................................................................................................99

7.22. Miscellaneous.............................................................................................................................99

7.22.1. Communications Section.....................................................................................99

7.22.2. Security..............................................................................................................100

7.22.3. Panelboards.......................................................................................................101

7.22.4. Grounding and Lightning Protection System....................................................101

7.22.5. Cathodic Protection System..............................................................................102

7.22.6. Lighting Systems...............................................................................................102

7.22.7. Cable and Raceway Systems.............................................................................103

7.23. General Wiring Requirements..................................................................................................107

7.24. Protective Relay Panel Functional Requirements.....................................................................108

7.25. Workstations.............................................................................................................................108

7.26. Testing and Checking of Electrical Equipment........................................................................108

7.27. Embedded Work.......................................................................................................................108

7.28. Freeze Protection......................................................................................................................108

7.29. Switchyard................................................................................................................................109

7.29.1. System Description and Scope..........................................................................109

7.29.2. Circuit Breakers.................................................................................................109

7.29.3. Disconnect Switches..........................................................................................110

7.29.4. System Protection..............................................................................................110

7.29.5. Control...............................................................................................................110

7.29.6. Power Metering.................................................................................................110

7.29.7. Non-Revenue Metering.....................................................................................111

7.29.8. Steel Structures..................................................................................................113

7.29.9. Miscellaneous....................................................................................................113

7.29.10. Switchyard Grounding and Lightning Protection.............................................113

7.29.11. Stability Study...................................................................................................114



8. INSTRUMENTATION AND CONTROL REQUIREMENTS................................114

8.1. Distributed Control System......................................................................................................116

8.1.1. Performance Requirements...............................................................................116

8.1.2. Functional Requirements...................................................................................116

8.1.3. Console Design..................................................................................................117

8.1.4. Hardware Requirements....................................................................................117

8.1.5. DCS Partitioning...............................................................................................117

8.1.6. Power.................................................................................................................118

8.1.7. System Failure Protection.................................................................................118

8.1.8. DCS Communication Network.........................................................................118

8.1.9. Printers...............................................................................................................118

8.1.10. Computing Hardware and System I/O..............................................................119

8.1.11. System Cabinets................................................................................................119

8.1.12. Electrical Design Criteria..................................................................................119

8.2. Software Requirements.............................................................................................................120

8.2.1. Data Acquisition................................................................................................120

8.2.2. DCS Interfaces..................................................................................................121

8.3. Testing......................................................................................................................................123

8.3.1. Tools..................................................................................................................123

8.3.2. Installation and Operating Instructions.............................................................123

8.4. Continuous Emissions Monitoring System...............................................................................123

8.4.1. Analyzer Subsystem..........................................................................................124

8.4.2. Sample Transport System..................................................................................124

8.4.3. Stack Gas Monitoring Equipment.....................................................................125

8.4.4. CEMS Data Logger...........................................................................................125

8.4.5. CEMS Enclosure...............................................................................................125

8.4.6. Documentation..................................................................................................125

8.4.7. Shipping.............................................................................................................126

8.4.8. Factory Checkout..............................................................................................126

8.5. Data Acquisition System..........................................................................................................126

8.5.1. Software...............................................................Error! Bookmark not defined.

8.5.2. Data Communications System.............................Error! Bookmark not defined.



8.5.3. Reporting and Recordkeeping Requirements......Error! Bookmark not defined.

8.5.4. Quality Assurance and Quality Control Data......Error! Bookmark not defined.

8.6. Balance-Of-Plant Instrumentation Installation Criteria And Installation Details.....................128

8.6.1. Scope of Specification.......................................................................................128

8.6.2. Instrumentation Electrical Requirements..........................................................131

8.6.3. Pressure Instruments..........................................................................................131

8.6.4. Temperature Instruments...................................................................................133

8.6.5. Level Instruments..............................................................................................134

8.6.6. Level Gauges.....................................................................................................136

8.6.7. Flow Elements – Flow Nozzles and Venturis...................................................136

8.6.8. Flow Elements – Orifice Plates.........................................................................137

8.6.9. Annunciators, Alarm Switches, and Electrical Devices....................................138

8.6.10. Process Analyzers and Analyzer Systems.........................................................139

8.6.11. Pressure and Temperature Switches..................................................................141

8.7. Instrument Air and Service Air Systems..................................................................................141

8.8. Field-Mounted Instruments.......................................................................................................141

8.8.1. Instrumentation - General Design.....................................................................142

8.8.2. Instrument Cabinets and Local Control Panels.................................................143

8.8.3. Instrument Tubing and Piping...........................................................................144

8.8.4. Air Piping, Fittings, and Pneumatic Devices....................................................146

8.9. Steam/Water Sampling and Analysis ......................................................................................147

8.10. Vibration Monitoring System...................................................................................................147

8.11. Plant Siren System....................................................................................................................147

8.12. Instrument Calibration..............................................................................................................147

8.13. I&C Maintenance Area Requirements......................................................................................147

9. CIVIL AND STRUCTURAL WORKS.......................................................................148

9.1. Design Criteria..........................................................................................................................148

9.1.1. Dead Loads........................................................................................................148

9.1.2. Live Loads.........................................................................................................148



9.2. Site Preparation.........................................................................................................................151

9.3. Geotechnical Investigations......................................................................................................151

9.4. Surveying..................................................................................................................................152

9.5. Site Development and Earth work............................................................................................152

9.6. Temporary Construction Facilities...........................................................................................152

9.7. Facility Grading........................................................................................................................153

9.7.1. Earthwork..........................................................................................................154

9.7.2. Clearing and Grubbing......................................................................................155

9.7.3. Stripping............................................................................................................155

9.7.4. Disposal of Unusable Soils................................................................................155

9.7.5. Erosion Control.................................................................................................156

9.7.6. Existing Underground Facilities........................................................................156

9.8. Access.......................................................................................................................................156

9.9. Water Discharge Systems.........................................................................................................156

9.9.1. Clean Storm Water Discharge System..............................................................157

9.9.2. Oil-Contaminated Discharge Systems...............................................................159

9.9.3. Process Wastewater Discharge System.............................................................158

9.9.4. Sanitary Wastewater Discharge System............................................................159

9.10. Roads, Parking Lots, and Walkways........................................................................................160

9.10.1. Facility Roads....................................................................................................160

9.10.2. Road Width and Clearance Requirements.........................................................160

9.10.3. Road Pavement..................................................................................................161

9.10.4. Parking Lots......................................................................................................161

9.10.5. Chemical Unloading..........................................................................................161

9.10.6. Facility Area Surfacing.....................................................................................161

9.10.7. Surfacing Plan...................................................................................................163

9.11. Landscaping..............................................................................................................................163

9.12. Fencing and Signage.................................................................................................................163

9.13. Buildings...................................................................................................................................164

9.13.1. Location and Footprint of Buildings.................................................................164



9.13.2. Building Requirements and Sizes......................................................................165

9.13.3. Architectural......................................................................................................168

9.13.4. Furnishings........................................................................................................170

9.13.5. Building Systems...............................................................................................171

9.14. Foundations for Equipment and Structures..............................................................................171

9.15. Concrete Work..........................................................................................................................172

9.16. Masonry Work..........................................................................................................................172

9.17. Steel Work................................................................................................................................173

9.17.1. Steel Grating and Steel Grating Stair Treads....................................................173

9.17.2. Stairs and Ladders.............................................................................................174

9.18. Painting and Coatings...............................................................................................................174

9.19. Design.......................................................................................................................................175

9.20. Construction..............................................................................................................................176

9.21. Testing and Inspections............................................................................................................177

10. DOCUMENT SUBMITTALS......................................................................................178

10.1. Documents To Be Submitted For Purchaser Review and Comment........................................179

10.2. Performance Curves..................................................................................................................183

10.3. Purchaser's Right to Receive Additional Documents for Information.....................................184

10.4. Documents To Be Submitted Before Turn over of Facility......................................................185

10.5. Drawings and Lists...................................................................................................................186

10.6. Instruction Books and Operating Manuals...............................................................................186



1. OVERALL FACILITY CONFIGURATION

The Facility will include ______________ Units and other balance-of-plant (BOP) systems and facilities for a complete, fully operational, Facility. Each Unit will include identical ___________ combustion turbines and balance-of-plant (BOP) systems and facilities associated with the Unit. Each power island includes __________ combustion turbine generators (CTGs) with each CTG exhausting into an exhaust stack. NOx emission control will be accomplished using NOx combustion control as well as Selective Catalytic Reduction (SCR). An inlet air filtration system will be included to provide suitably filtered combustion air to the CTG and evaporative cooling will be provided.

Power for each Unit will be generated at ____ and stepped up through an individual main transformer to the Utility grid. An on-site switchyard shall be designed, furnished and installed to meet the interconnect utility, ISO and WCCP requirements.

1.1. Major Components

The Facility shall consist of the following major components:

______ CTGs, complete with NOx combustion control, evaporative coolers, and all other auxiliaries, each equipped with transitions, expansion joints, an SCR system to control emissions of NOx, a CO reduction catalyst system and all other auxiliaries

1.2. Balance of Plant Support Systems

The BOP support systems include, but are not limited to, the following:

One Distributed Control System (DCS) for the simple cycle facility and balance-of-plant (BOP) control, data acquisition and data analysis.

One natural gas system

One liquid fuel system, if applicable

Ammonia unloading, storage, and transfer systems

Interconnecting piping for combustion turbine liquid fuel system, if applicable

Cooling water systems

Raw water treatment system

Water treatment system

Fire/filtered water storage tank

Demineralized water storage tanks



Chemical storage and injection systems

Hypochlorite storage and injection system , if required

Domestic (potable) water system, including well or utility interconnect

Sanitary waste system

Process waste water system

Fire detection, alarm, and suppression systems

Instrument air system

Service air system

Permanent Facility communications system

Heating, ventilating and air conditioning (HVAC) systems

Storm water management system

Sampling system

Emergency power system, including emergency electric power generator

Electric power distribution system

Lighting system

Lightning protection system

Cathodic protection system

Freeze Protection system, if required by environmental conditions.

Grounding system

Expansion joints

Roads (including the access road), fencing and parking

Transmission interconnection facilities,

Continuous Emissions Monitoring System (CEMS), and Data Acquisition and Handling System (DAHS)

Administrative and maintenance buildings

Bottled gas storage (e.g., CEMS, CO2)

Natural gas line and on-site metering station per the pipeline company interconnect requirements

Electrical transmission tie-in

Interfaces with the above temporary or mobile systems including mobile demineralizer trailers.



2. SITE CONDITIONS

The facility shall be designed in accordance with the Site Conditions specified in Appendix N3.

2.1. Site Elevation and Barometric Pressure

The facility shall be designed based on the site elevation listed in Appendix N3.

2.2. Temperatures

Equipment shall be designed to operate and stand down without damage throughout the temperature range listed in Appendix N3.

2.3. Precipitation, Wind, and Earthquake

The Facility shall be designed for the maximum rainfall conditions listed in Appendix N3. Snow Load (if applicable)

Design snow loads shall be in accordance with the requirements set forth in the California Building Code and or local governing building code.

Design wind loads shall be in accordance with the requirements set forth in the California Building Code and or local governing building code. The Importance Factor for wind shall be 1.0 (non-essential facility). The applicable basic wind velocity in mph and the site specific exposure (B, C or D) is listed in Appendix N3.

Seismic design loads shall be in accordance with the requirements set forth in the California Building and or local governing building code. The applicable seismic zone shall be either Zone 4 or Zone 3 for the specific site location. The site shall be assigned a soil profile type as substantiated by geotechnical data for the specific site. The Importance Factor for seismic shall be 1.0 (non-essential facility). The applicable seismic zone, soil profile type, and seismic coefficients Ca and Cv are listed in Appendix N3.

The site footprint shall not be located in a floodplain.

3. CODES AND STANDARDS

Systems and equipment shall be designed in accordance with Codes and Standards, Regulations, Governmental Approvals and Governmental Rules in effect at the date of execution of this Contract. Applicable sections of Governmental Rules will be referenced as required in the relevant technical specifications. In case of conflict among this Scope Document, referenced Governmental Rules, and manufacturer's standard practices, the Purchaser shall determine which will govern. Where there are no applicable Governmental rules, power industry practice shall apply.



3.1. State and Local Building Codes, Standards and Ordinances Code, Rules and Regulations of the State of California

California Building Code

California OSHA (CALOSHA)

Local laws, ordinances, and regulations

3.2. U.S. Government Codes, Ordinances, and Standards Occupational Safety and Health Act (0SHA) - 29 CFR 1910, 1926

Federal Aviation Agency (FAA) - Obstruction Marking and Lighting AC No. 70/7460-IJ)

Environmental Protection Agency (EPA) - 40 CFR 423, 40 CFR 60, 40 CFR 72, 40 CFR 75, 40 CFR 112

Appendix A to Part 36, “American Disability Act Accessibility Guidelines for Buildings and Facilities

3.3. American Society of Mechanical Engineers

The following standards of the American Society of Mechanical Engineers (ASME) shall be followed:

ASME Boiler and Pressure Vessel Code Sections:

I Power Boilers

II Material Specifications

Part A: Ferrous Materials

Part B: Nonferrous Materials

Part C: Welding Rods, Electrodes, and Filler Metals

V Nondestructive Examination

VIII Pressure Vessels Division 1

IX Welding and Brazing Qualifications

ASME B31.1 - Power Piping

ASME Performance Test Codes:

The following performance test code may be used as guidance in conducting the performance for the overall facility:

PTC 46 Overall Plant Performance

PTC 1 General Instructions



PTC -19.1 Measurement Uncertainty

The following performance test codes may be used as guidance in conducting performance tests if a shortfall in overall Facility performance requires individual component testing:

PTC -19.2 Pressure Measurement

PTC -19.3 Temperature Measurement

PTC – 22 Gas Turbine Power Plants

3.4. American National Standards Institute

The following standards of the American National Standards Institute (ANSI) shall be followed:

B16.1 Cast Iron Pipe Flanges and Flanged Fittings

B16.5 Steel Pipe, Flanges, and Fittings

B16.34 Steel Valves

B30.17 Overhead and Gantry Cranes

B133.8 Gas Turbine Installation Sound Emissions

C2 National Electrical Safety Code

C37.010 Application Guide for AC High Voltage Circuit Breakers Rated on a Symmetrical Current Basis

C37.04 Standard Rating Structure for AC High Voltage Circuit Breakers Rated on a Symmetrical Current Basis

C37.06 Switchgear - AC High Voltage Circuit Breakers Rated on a Symmetrical Current Basis -Preferred Ratings and Related Required Capabilities

C37.13 Standard for low Voltage AC Power Circuit Breakers Used in Enclosures

C37.20.1 Standard for Metal-Enclosed Low-Voltage Power Circuit Breaker Switchgear

C37.20.2 Standard Metal-Clad and Station-Type Cubicle Switchgear

C37.23 Guide for Metal-Enclosed Bus and Calculating Losses in Isolated-Phase Bus

C37.30 Definitions and Requirements for High-Voltage Air Switches, Insulators, and Bus Supports

C50.41 Polyphase Induction Motors for Power Generating Stations

C57.12.10 Transformers - 230 kV and below, 833/958 through 8,333/110,417 kVA Single Phase and 750/862 through 60,000/80,000/100,000 kVA Three Phase without Load Tap C Changing, and 3,750/4,682 through 60,000/80,000/100,000 kVA With Load Tap Changing- Safety Requirements



C57.12.55 Transformers - Dry-Type Transformers Used in Unit Installation, Including Unit Substations

C57.12.70 Terminal Markings and Connections for Distribution and Power Transformers

C57.13 Standard Requirements for Instrument Transformers

C57.109 Guide for Transformer Through-Fault-Current Duration

C62.11 Standard for Metal-Oxide Surge Arresters for AC Power Circuits

3.5. Industry Standards

Applicable standards issued by the following industry organizations:

American Association of State Highway and Transportation Officials (AASHTO)

American Boiler Manufacturers Association (ABMA)

American Concrete Institute (ACI)

American Gas Association (AGA)

American Gear Manufacturers Association (AGMA)

American Institute of Steel Construction (AISC)

American Iron and Steel Institute (AISI)

Air Moving and Conditioning Association (AMCA)

American National Standards Institute (ANSI)

American Petroleum Institute (API)

American Society for Nondestructive Testing (ASNT)

American Society for Testing and Materials (ASTM)

American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE)

American Water Works Association (AWWA)

American Welding Society (AWS)

Anti-Friction Bearing Manufacturers Association (AFBMA)

Crane Equipment Manufacturer’s Association of America (CMMA)

Expansion Joint Manufactures Association (EJMA)

Fluid Control Institute (FCI)

Heat Exchange Institute (HEI)

Hydraulic Institute (HI) - Standard for Pumps

Illuminating Engineering Society (IES)

Institute of Electrical and Electronics Engineers (IEEE)



Insulated Cable Engineers Association (ICEA)

Instrument Society of America (ISA)

Manufacturers Standardization Society (MSS) of the Valve and Fittings Industry

Metal Building Manufacturers Association (MBMA)

National Association of Corrosion Engineers (NACE)

National Electrical Manufacturers Association (NEMA)

National Fire Protection Association (NFPA) National Fire Codes

Pipe Fabrication Institute (PFI)

Sheet Metal and Air Conditioning Contractors National Association (SMACNA)

Steel Structures Painting Council (SSPC)

Thermal Insulation Manufacturers Association (TIMA)

Tubular Exchanger Manufacturers Association (TEMA)

Underwriters Laboratories, Inc. (UL) - fire protection equipment only

Welding Research Council (WRC)

3.6. Electric Utility Requirements California ISO

PG&E Interconnection Requirements– see http://www.pge.com/about/rates/tariffbook/ferc/tih/

Western Electricity Coordinating Council (WECC)

California Energy Commission

Utility interconnect requirements for fuel (gas), power transmission, and water.

4. TECHNICAL REQUIREMENTS

Long-term safety, reliability, operability and maintainability of the Facility is of primary concern to the Purchaser. As a result, the Seller shall take prudent measures in the design to facilitate ease of operation and maintenance and provide adequate access to all equipment. Where required to perform normal maintenance functions, facilities such as equipment removal monorails shall be provided. Wherever practical, valves and instruments shall be located such that they can be operated and easily accessed from grade. Where valves and instruments normally requiring operator access must be located in elevated locations, access platforms, handrails, and ladders shall be provided. All valves (including safety and relief valves) and components shall be accessible for routine maintenance. Minimum clearance over walkways and platforms shall be 7'-6". Adequate provisions for removal of the generator rotor and turbine maintenance and laydown must be provided and shown in the general arrangement. Platform access with stairs shall be provided to all metering and custody transfer points that are not readily accessible from


http://www.pge.com/about/rates/tariffbook/ferc/tih/


grade. All task lighting applications shall be arranged to provide shadow-free lighting for the area.

The proposed layout must accommodate concurrent maintenance on the combustion turbines with separate cranes. All lifting devices shall be clearly stenciled with rated lifting capacity. Provisions for a maintenance trailer area, along with associated electrical, phone, and internet connections are required.

Facilities provided by the Seller must be adequate to support the number of individuals who will be assigned to the Facility on a continuing basis, both during routine maintenance and normal operations. Facilities required to support maintenance crews during maintenance inspections/overhauls will be brought onsite on a temporary basis.

Plant must be automated and designed to be operated both with on-site operator and remotely with no personnel on-site.

Equipment or other items which contain PCBs, asbestos, or asbestos bearing materials are prohibited from use, as are instruments containing mercury. All hazardous and non-hazardous wastes generated during the construction process shall be collected and segregated by the Seller and stored in a secure area in properly labeled drums, which identify the wastes contained. Disposal of such wastes shall be the responsibility of the Seller, using the services of properly licensed technically capable subcontractors. The Seller shall comply with all applicable local, state, and federal regulations.

Nametags and nameplates shall be provided for all equipment and instruments supplied under this Contract. Nameplates or tags shall be constructed of stainless steel and should be stamped, as a minimum, with the manufacturer's name, the purchase order number under which the item was purchased, and the equipment identification number used to identify that piece of equipment on the drawings. Nametags shall either be permanently attached to the equipment using rivets or stainless steel machine screws or shall be wired to the item using stainless steel wire.

The design and layout of equipment within the Facility boundary shall meet Occupational Safety and Health Administration (OSHA) and California OSHA (CALOSHA) permissible noise exposure level without the use of hearing protection for a 12-hour duration per day. Where this is not possible, specific areas shall be designate as high noise level areas and the limits shall be indicated on the general arrangement drawings. In any case, the local noise ordinance shall be met, unless a variance can be obtained from the local authority. Plant noise levels shall be within permit specifications under all operating conditions.

Signs, fire extinguishers, marking of high noise areas requiring hearing protection, and other items needed to meet OSHA regulations and otherwise ensure minimal risk to personnel health and safety while at the Facility shall be provided.

All outdoor equipment and materials shall be designed and installed consistent with expected use and environmental conditions (e.g. freeze protection, moisture & dust controls, cooling and ventilation, heat tracing and insulation for electrical motors, cabinets/load centers, sample, trap and chemical feed lines, etc.)



All plant equipment (pumps and motors) shall be fully isolatable to facilitate maintenance repairs or replacement.

All major piping interfaces (such as incoming raw water, natural gas, and outgoing wastewater) shall be fully metered with revenue quality instrumentation.

Power augmentation such as fogging, evaporative cooling, and steam injection may be used provided it meets all OEM requirements.

4.1. System Descriptions

System descriptions shall be submitted to Purchaser for approval no less than four (4) months before the start of the operator training program. PG&E will provide the typical format to be used for draft system descriptions. Final system descriptions shall be revised to reflect as-built conditions.

4.2. Plant Identification System

The Seller shall use a uniform designation and numbering system for all plant systems and equipment and across the entire site. The designation and numbering system shall be coded to designate unit number or common facilities, process system, equipment name, subcomponent or function name. The designations shall be used on all drawings, schedules, descriptions, and other documents as well as on all nameplates, tags, and other markings.

The following conventions shall be used for numbering of equipment:

North to South – increasing numbers

East to West – increasing numbers.

The Seller shall ensure that all numbering and nomenclature of high voltage apparatus will be in accordance with PG&E Interconnection Handbook.

Each equipment, motor, valve, instrument, control panel and pertaining apparatus shall be provided with name plates or tags indicating their purpose and identification designation. The label shall also include the normal operating position for all shut-off valves. All actuated valve tags shall include the valve and actuator reference number.

Nameplate surfaces for cubicles and control equipment shall have a matt or satin finish to avoid dazzle. Equipment identification and components may use engraved plastic or weatherproof nameplates, where appropriate. Name tags used on valves and instrumentation shall be permanently attached to the equipment using rivets, machine screws or stainless steel wire.

All major equipment shall be provided with data plates, indicating the name of manufacturer, type, serial number, year of fabrication, main characteristics and other information, as appropriate.



All components of the various pipe systems shall be clearly identified. Piping shall be painted and/or marked in accordance with the fluid contained according to agreed and approved power plant color code. Where color coding is impractical, the type of fluid contained in the pipe shall be permanently stenciled onto the exterior surface of the pipe or the pipe cladding at a maximum interval of every 15 feet. Piping containing hazardous materials shall be labeled in accordance to ANSI A13.1.

Both ends of all power and instrument cables shall be clearly identified. A standard system of colors for cable cores and wire color used for the wires in all panels, cubicles and cabinets shall be specified and used by the Seller.

4.3. Supplier Factory Tests

Seller specifications will require certain factory/functional tests of selected equipment, including, but not limited to, the following:

Combustion turbine including starting motor/torque converter/gearbox and generator

Selective catalytic reduction system

Main transformers

Generator excitation system

Station service transformer

Air cooled heat exchangers

Water cooled heat exchangers

DCS

CEMS/DAHS (review of system software)

Tests will be required for other equipment as considered appropriate by Purchaser

A preliminary list of witness and hold points to be developed by Seller and approved by Purchaser.

Seller will review suppliers’ certified test data for compliance with specified performance and functional criteria. Seller shall provide Buyer with test results as requested and provide the opportunity for Buyer to witness tests.

4.4. Testing

Shop inspection and testing will be conducted in accordance with the requirements of applicable codes and standards.

Seller shall furnish a table for approval by Purchaser showing inspection and testing for all major purchase orders and field erected piping.



Pressure vessels will be shop tested per ASME Section VIII. Atmospheric tanks will be hydrotested by filling with water. Welders will be certified per applicable codes.

Prefabricated piping to be skid-mounted will be hydrotested per ASME B 31.1 at the fabricator’s shop when required by the applicable code or standard.

After assembly, piping systems will be given a leak test.

Assembled equipment will be visually examined.

Certified pump performance curves will be supplied for each pump based on previous tests conducted by the vendors.

A complete functional checkout of the control panel and controls will be done at the manufacturer’s shop before shipment.

Pressure testing, including pressure testing at 1.5 times the design pressure (unless noted otherwise), will be specified and performed for pressure components. All pipe joints must be exposed where pipe insulation is installed before the pressure testing. Pressure testing shall include but not be limited to the following equipment and piping systems:

Pump casings

Fire protection system (test pressure per NFPA)

Fuel gas system

Liquid fuel system, if applicable

Chemical feed systems, if applicable

SCR ammonia system

All underground piping (other NDE may be accepted for makeup water and blowdown piping subject to prior written Purchaser approval)

Closed cooling water system

Potable water system

Makeup water system

Demineralized water system

Blowdown system

Water will normally be used as the test medium for hydrostatic testing. The water will be clean and will be of such quality as to minimize corrosion of the materials in the piping system. The hydrostatic test pressure will not be less than 1.5 times the design pressure, but will not exceed the maximum allowable test pressure of any non-isolated components, such as vessels, pumps, or valves. At the end of any hydrostatic testing, the system will be layed-up appropriately. Pneumatic testing will not be used unless approved by the Purchaser.

For non-water systems, water will be drained and piping/equipment will be dried before placing the system in service.



Supplier’s standard functional field tests will be performed on the Facility systems and associated components during startup.

Code stamped pressure vessels will be shop tested hydrostatically per the code.

Purchaser may, from time to time, make visual examination of the equipment and the conditions under which it is being manufactured, both at the manufacturer’s work and on site.

4.5. Welding

Welders and welding procedures will be certified in accordance with the requirements of the applicable codes and standards before performing any welding. Seller will maintain indexed records of welder qualifications and weld procedures. Welders engaged in on-site welding will be supervised.

Welding of ferrous piping will be in accordance with ASME B31.1 and ASME Section IX of the Boiler and Pressure Vessel Code, as well as industry standards. Fusion welding of high-density polyethylene pipe will be performed in accordance with the manufacturer's recommendations using equipment approved for this purpose by the manufacturer.

Electrodes and/or welding rods to be used and the fabrication procedure to be adopted will be in accordance with the applicable code or standard and will be of low silica content.

Before welding, the work will be heated, where necessary, in an approved manner, and the temperature will be maintained throughout the operation.

After completion of welding, fabricated parts will be stress relieved as required by applicable code or standard.

The extent of weld inspection and the final weld quality will comply with the applicable standard or code. Nonconformance in welds is not acceptable. Indexed records of welder qualifications, weld procedures, and weld inspection and repair reports shall be available for inspection by Purchaser.

4.6. Lubrication

The types of lubrication specified for Facility equipment will be suited to the operating conditions, will be in the beginning of the lubrication’s life cycle, and will comply with the recommendations of the equipment manufacturers at the time of facility turnover.

Rotating equipment will be splash lubricated, force lubricated, or self-lubricated. Oil cups will be provided as necessary. Where automatic lubricators are fitted to equipment, provisions for emergency hand lubrication will also be specified. Where applicable, equipment will be designed for manual lubrication without the removal of protective



guards while the equipment is in operation. Lubrication fill, drain, and sample points will be readily accessible. Manual lubrication provisions will be external to guards with machinery in motion.

Wherever possible, the lubricants proposed will be readily available.

The types of lubrication specified for the Facility equipment will be suited to the operating conditions and will comply with the recommendations of the equipment manufacturers.

4.7. Consumables

Seller shall replenish the Facility consumables (demineralizer water, chemicals, gases and other) such that at Turnover of the facility Purchaser has a full supply.

5. OPERATIONAL REQUIREMENTS

The Facility will be designed so that each Unit may be operated independently, and a single failure of mechanical equipment common to all Units will not trip any operating Unit.

The Facility and each Unit will be fully dispatchable with automatic generation control (AGC). The Facility and each Unit will be capable of being dispatched from minimum to full load, as specified in Appendix N3. The Facility and each Unit will also be capable of cycling operation. Balance-of-plant design will not limit CTG operation over the full range of site ambient conditions.

The Facility will be started without a source of auxiliary steam. Design of the Facility shall consider limitations on emissions imposed by the local air district and the CEC.

The Facility does not need to have black start capability. An independent dual source of power from the electric utility is required to meet house loads, including operation of all necessary standby equipment and systems.

The sequence of startup varies only slightly depending upon whether the CTG is cold, warm or hot. However, the duration of a start-up will be dependent on the initial conditions of the plant. Each of the units that comprise the facility shall be designed to achieve the startup times listed in Appendix N3 for the specified shutdown periods for each Unit. Design of the Facility shall consider limitations on emissions imposed by the local air district and the CEC.

The operational requirements include:

The plant shall meet all air emission and other permit limits, during startup, shutdown, normal operating and changing loads for a minimum of 4000 operating hours per year.



The plant shall operate in automatic as well as manual control from a centralized control room through a DCS system. Automatic Generation Control (AGC) shall be included so that the unit can be dispatched and controlled remotely including making minute-to-minute variation and load following.

Each unit shall be capable to start from zero load and reach grid synchronization at full load in 10 minutes or less and to meet CAISO’s criteria for Non-Spinning Reserve.

Each unit shall be capability to complete a shutdown and restart cycle in less than one hour and perform three start-stop cycles per day with no maintenance penalty. Start based maintenance may be considered in lieu of no maintenance penalty.

Minimum run time – 15 minutes or less per start.

Ability for both local control and to connect to a remote source for starting and stopping of the facility.

Meets all North American Electric Reliability Corporation (NERC) requirements (cyber, site security, other).

Meets the CAISO interconnection requirements including metering and ancillary service provisions.

The Facility controls for the simple cycle units shall be designed to provide remote start and stop capability from Purchasers remote location with remote monitoring. This shall be achievable without any onsite operator intervention. After startup the Facility shall be capable to transferring to Automatic Generation Control. In addition, the Facility shall be capable of remote shutdown. The control system may use the Ethernet based protocol for interface for the remote start/stop capability. The protocol to be used for the remote start/stop capability shall be finalized during the detail design. Remote starting and stopping shall be done without any personnel present at the facility.

6. MAJOR MECHANICAL EQUIPMENT AND SYSTEMS

6.1. Combustion Turbine

Equipment to be of proven design with large number of units in operation and experiencing high reliability track record.

The compressor shall be a multistage axial-type and shall be directly coupled to the turbine section. Modulating inlet air guide vanes shall be provided.

The combustion system shall be designed to maximize combustion efficiency, combustion stability, and equipment life while meeting air emissions requirements while firing natural gas. If liquid fuel is to be used for a back up fuel supply, the combustion system shall be similarly designed to deliver efficient, stable, long life compliance.



The turbine blades shall be designed to minimize loads due to tangential, axial, and torsional modes of vibration under all anticipated operating conditions.

Turbine blades and nozzles shall be coated as necessary to prevent degradation from erosion, corrosion, or deposits. Components to be coated and coatings to be used shall be identified in the proposal. Blade coatings must be available domestically.

A complete lubrication and control oil system including reservoir, pumps, filters, pressure regulation, cooling-heating, circulating pipe to the turbine shall be provided as described in section 6.2.

6.1.1. Turbine Supervisory Instrumentation (TSI)

A complete Bentley Nevada 3500 or equal turbine supervisory instrumentation (TSI) system with locally mounted supervisory instruments required for safe startup, operation, and shutdown of the turbine generator shall be provided which includes the following:

Vibration monitor on all the combustion turbine generator bearings using X and Y vibration probes.

Rotor speed and one zero speed sensor.

Key phasers, three-speed and one zero-speed sensors (rotor speed).

Temperature measurements of turbine metal, CTG bearing, and generator stator.

Full data acquisition and facility control through the DCS automatic and manual synchronizers

6.1.2. Inlet Air Filter

The inlet filters to the combustion turbines shall be provided meeting the requirements of the combustion turbine supplier. The filters shall be selected to meet the ambient conditions and shall account for severe weather conditions such as icing, heavy rain, fog, or dust conditions that result in high differential pressures.

A self-cleaning pulse-type filter shall be used unless not permitted by local environmental conditions. The filters shall be selected and sized to provide minimum installed site life of 36 months.

The high-efficiency cartridge filters shall be designed for 99.9% efficiency for removing particles 5 micrometers (microns) and larger and 99% efficient in removing particles 2 microns and larger. The face velocity (horizontal component of the airflow) through the filter media shall not exceed 500 ft/min.

Filter media shall be Donaldson Spiderweb or equivalent with minimum 4 year life expectancy.

The inlet air filter system shall include the following:

Stairways, and platforms (for access and maintenance) meeting OSHA requirements.



Interior lighting and convenience outlets.

Lifting facilities for raising and lowering filter elements from grade level to the filter element access elevation.

A louver or weather hood to minimize the entry of rain into inlet filter.

A debris/bird screen immediately ahead of the inlet filter openings to prevent debris and birds from entering inlet will be provided. The metal inlet screen shall not have larger than one-inch mesh. Inlets shall have drainage holes to prevent standing water during outages.

Differential pressure measurement across filters linked through the DCS to allow assessment of the optimum period to change the filter pads.

A system to indicate possible inlet icing conditions (where icing conditions can be expected). Windows shall be located in inlet ducts with lighting to enable on-line observation of the inlet scroll and inlet guide vanes.

Filter designed to minimize re-depositing particles expelled during pulsing.

Enclosure sufficiently rigid to avoid vibration problems. Fasteners shall be suitably locked to prevent loosening especially those on the inlet that could be ingested by the compressor.

Manufacturer’s standard air inlet filter. Inlet face velocity shall not exceed 500 ft/min with high efficiency filters meeting the combustion turbine manufacturer’s requirements.

Ability to change inlet air filters during on line operation with no load curtailment

6.1.3. Acoustic Enclosures

The combustion turbine-generator package shall be enclosed by several connected sections of weather protective housing structurally attached to the compartment base. These enclosures shall provide ventilation (with 100% redundancy), thermal insulation, acoustical attenuation, and fire protection media containment.

6.1.4. Water Wash System

Online CTG compressor water wash systems with drains shall be provided. All valves shall be accessible for routine maintenance. A single wash-water skid-mounted system with permanent piping to all combustion turbines shall be provided.

A separate CTG water wash drain system shall be provided for each Unit.

Waste water from the CTG during and after an off-line water wash procedure shall be collected in a sump with capability to transfer the collected waste to the turbine building sump.



6.1.5. Combustion Turbine Exhaust Duct

The stainless steel liner covering system shall consist of mineral wool and ceramic fiber insulation and an interior stainless steel liner. Insulation shall be retained to prevent packing. The liner shall be retained in such a manner as to prevent movement perpendicular to the duct and to allow axial thermal expansion and contraction. Provisions at overlaps shall be provided to prevent the liner from buckling or being lifted by gas flow velocities in the duct.

6.1.6. Exhaust Stack

Exhaust stack shall be constructed of carbon steel with interior stack coating and, if necessary to meet noise limitations, sound buffers. Stack drains shall be provided and routed to the chemical waste drain system.

Exhaust system outside skin temperature shall not exceed 140°F for personnel protection during any operating condition at summer design ambient conditions with still air (0 mph wind speed).

Stack warning lights and/or coloring shall be incorporated, as required by Federal Aviation Authority (FAA) regulations.

6.2. Lube and Control Oil Systems

The facility shall include a complete lubrication system including storage, pumps, filters, pressure regulation, cooling-heating, circulating pipe to the turbine, and instrumentation and controls and include the following features:

The oil reservoir will be sized in accordance with industry standards to provide a normal operating volume of at least 5 times the flow per minute to the bearings and other services. Electrical immersion heaters with thermostatic control shall be furnished and shall be capable of maintaining the optimal oil temperature at minimum specified winter design ambient temperature conditions.

Lube oil supply and drain piping, valves, and fittings may be stainless or carbon steel. Lube oil supply piping shall be routed inside the drain line.

Two lube oil pumps with AC motor drives. As an alternate, one full capacity shaft driven lube oil pump and one full capacity AC motor-driven lube oil pump shall be provided. With either alternative, one partial capacity DC motor driven lube oil pump sized to provide adequate flow during trip conditions shall be provided.

Two 100% capacity water-cooled lube oil coolers shall be provided and piped such that one unit may be serviced while the other unit is in operation.

A duplex, 100% capacity multi-element lube oil filter with a continuous flow transfer valve shall be provided with connections and piping for a portable centrifuge filter.



Equipment shall include two 100% oil vapor extractors with mist eliminators which meet permit emission limits. Extractors shall purge bearing housings and reservoir of oil vapors.

Coalescent type mist eliminators shall be provided. Oil shall be separated and returned to the lube oil reservoir.

Additional instrumentation shall include dual-element thermocouples for monitoring and alarm to measure turbine and generator bearing metal temperatures. Bearing header and vapor extraction vacuum pressures shall be measured and indicated locally and on the unit control system. Lube oil pressure to each bearing or in the common lube oil supply line shall be indicated in the unit's control system.

Valved connections shall be provided to provide for future installation of a portable centrifuge.

Hydraulic fluid control system shall be designed to use fire resistant fluid. It shall be provided with the following:

A reservoir with access doors, float-type level gauge, and two high- and two low-level switches

Redundant, full size AC motor-driven pumps

Filtering equipment with in-line duplex filters

Two full-size coolers

316 stainless steel piping from reservoir and from turbine and to hydraulic actuators

Dual thermocouples and indicating thermometers for indication of fluid temperature, and pressure gauges and electronic pressure transmitters for indication of fluid pressure

6.3. Closed Cooling Water System (if needed)

The closed cooling water system shall be designed for removing the maximum heat rejected from all the auxiliary equipment identified and rejecting it to the atmosphere. Two 100% capacity pumps and cooling water heat exchangers, each isolatable for routine cleaning and tube plugging without plant curtailment shall be provided. An elevated water surge tank shall be provided for surge capability, system makeup, venting, and adequate net positive suction head (NPSH) for the closed cooling water pumps.

The cooling water heat exchangers and pumps shall be sized to supply adequate cooling water to the closed loop system. The system shall be designed to provide adequate cooling for the site conditions. The system design shall permit shutdown and maintenance of the individual items of equipment without interruption of the cooling function of the rest of the system.



6.4. Turning Gear

Turning gear shall be furnished complete with AC electric motor drive (DC drive) as well as a hand crank (or pneumatic) system, and auxiliary switches to indicate in and out positions of gear mechanisms.

6.5. Pumps

All pumps shall be designed for continuous operation unless otherwise specified.

All pumps shall be installed in positions convenient for operation and servicing. Where multiple pump installations are required, each pump and its associated equipment shall be arranged in such a manner as to permit easy access for operation, maintenance, and pump removal without affecting plant operation. Lifting lugs, eye bolts, and other special tackle shall be provided to permit easy handling and removal of the pump and its components.

Standard types of pumps shall be used wherever possible. Only proven products and models are to be supplied.

Strainers (startup or permanent) shall be installed in the suction piping of horizontal pumps or sets of pumps. The driver shall be mounted on an extension of the pump bedplate and shall drive the pump through a flexible coupling with OSHA coupling guard.

Pumping systems with variable flow requirement shall have a recirculation line for pump protection. As a minimum, pumps with motors rated for 25 hp and above shall be supplied with a recirculation line for protection. The recirculation line shall normally be routed to the source from which the system takes suction. Modulating or two-position automatic recirculation valves or restriction orifices shall be used as applicable. Pumps furnished for each application shall be sized to accept an impeller at least 1/8 inch larger in diameter than the impeller specified without having to change the pump casing.

Vent and drain plugs shall be fitted, where necessary, at suitable points on the pump casing. Oil system pump vents and drains shall be provided with valves. Horizontal split-case pumps shall allow the removable half casing and impeller to be withdrawn without disturbing any of the process piping or valves. Horizontal end-suction pumps shall allow the impeller to be withdrawn from the motor end without disturbing the motor or discharge piping.

Where part-load (e.g., two 50%) duplicate pumps for the same service are provided, they shall be capable of operating in parallel.

6.5.1. Pump Types

Centrifugal pumps shall be used wherever possible. Positive displacement screw pumps may be used when handling fuel and lubricate oils, and reciprocating pumps will be accepted for chemical dosing and metering purposes.



6.5.2. General Design and Construction

All pumps shall be designed to withstand 1.5 times the pump shut-off pressure, under maximum suction pressure conditions, unless otherwise specified. All pump shafts shall be of ample size to transmit the full output from their drivers. Impellers shall be fitted to the shaft in a suitable manner that will permit the transmission of the maximum torque developed under any operating condition and removal without damage to either impeller or shaft.

All pumps shall be selected such that they do not cavitate under the expected range of operating conditions.

Renewable wear rings shall be fitted to the casing and impeller.

All pumps shall be constructed of materials specifically designed for the conditions and nature of the pumped fluid and to resist cavitation, erosion, and corrosion.

Seals shall be provided and must meet the working conditions. For centrifugal pumps, mechanical seals shall be adopted.

Centrifugal pumps shall preferably be of the horizontal-shaft type unless specified otherwise. Each horizontal pump shall be mounted with its driving motor on a common baseplate of rigid construction. The baseplate shall be provided with a drip tray fitted with a drain line and valve.

The construction of the pump casing shall be two parts, an upper part and a lower part, for easy maintenance.

Vertical-shaft centrifugal pumps may be employed when pumped liquids are at or near their boiling point. Pumps for such duties must be carefully sited to ensure that the Net Positive Suction Head Available (NPSHA) under all operating conditions will be adequate for the type of pump employed. The NPSHA values represent the worst operating conditions, i.e., the lowest atmospheric pressure, lowest suction pressure of the pump, and highest temperature of the pumped fluid.

Horizontal shaft, 3,600 rpm pumps of the centrifugal type shall have balanced impellers and at least two bearings. The driver shall be mounted on an extension of the pump bedplate and shall drive the pump through a flexible coupling of an approved type.

Centrifugal pumps shall be of rigid-shaft design and shall be designed such that the first critical speed of the pump, when coupled to its driver is at least 10% higher than the maximum operating speed. The entire rotor assembly shall be statically balanced, and dynamic balancing is required in one of the following cases:

Pump speed exceeds 1,500 rpm, capacity exceeds 200 gpm and impeller diameter exceeds 6 inches,

Pump speed exceeds 1,500 rpm for pumps of 2 or more stages.



Pumps shall operate smoothly throughout the speed range in reaching their operating speed. Where necessary the pumps are to be fitted with devices to ensure a minimum through-flow.

The piping upstream of a pump shall be at least as large as the pump suction connection. Velocity shall be limited to 5 fps if there is a suction lift (negative pressure).

6.5.3. Pump Characteristics

Where a number of pumps are used for the same purpose, they shall be suitable for parallel operation and shall be interchangeable.

The pump head characteristics shall be such that the head will continuously increase with decreasing flow quantity with a maximum head reached at zero flow. Generally, a head increase of 15% above the duty point at zero flow will be acceptable.

Full pump characteristic curves giving head/capacity, efficiency/capacity, power absorbed/capacity, and net positive suction head required/capacity shall be provided for all pumps.

Unless otherwise specified, the capacity of all pumps shall be so determined that under normal operation, their total rated running output is 110% of the process flow, if the suction level is controlled, and 115% of the process flow, if the suction is uncontrolled (i.e., free suction pump).

6.5.4. Fittings

All pumps shall be installed with isolating valves, a discharge non-return valve, and suction and discharge pressure gauges, unless otherwise stated. All positive displacement pumps shall be fitted with a discharge relief valve. Provisions for temperature measurement shall be made in all pump suction and discharge pipe sections adjacent to the pump flanges.

All couplings and any intermediate shafting shall be supplied with removable type coupling guards that shall cover the rotating parts and comply with the stipulations on guards in the relevant section of this Specification.

Coupling halves shall be so matched as to ensure accurate alignment. Horizontal shaft pumps shall be driven by the motor through an approved type of flexible coupling. Pin-type flexible couplings shall not be used. Vertical shaft and in-line pumps may be driven directly by the motor through a rigid coupling provided the motor thrust bearing has adequate margin to take care of the pump’s maximum thrust.

All pumps other than submersible pumps shall have temporary strainers fitted in the suction pipe-work during initial start-up and commissioning. Pumps shall be provided with permanent strainers together with differential pressure gauges and alarm facilities.



Air release valves shall be fitted to all pumps at suitable points on the pump casing unless the pump is self-venting due to the arrangement of the suction and discharge nozzles. Drainage facilities shall be provided on the pump casing or adjacent pipe-work to facilitate the dismantling of pumps.

6.5.5. Bearings

All bearings shall be of ample surface area and, for large pumps, shall be of the automatic oil-lubricated sleeve type.

On pumps utilizing ball or roller bearings, the inner race shall be fitted directly onto the shaft and reliably fixed by a shoulder on the shaft. Bearings on vertical-shaft pumps shall be so spaced as to prevent shaft whipping or vibration under any mode of operation.

Bearing housing on horizontal shaft pumps shall be so designed that the bearings can be replaced without removing the pump or motor from its mounting.

Bearing housing on horizontal shaft pumps shall be effectively protected against the ingress of water, pumped fluid, and dust with suitable non-ferrous deflectors.

All bearings oil wells shall be fitted with visual oil level indicators and local thermometers. Means of draining bearing housings shall be provided.

6.6. Piping

All materials for piping, valves, fittings, pressure vessels, and associated piping components shall conform to the applicable ANSI Codes. All power piping shall conform to ANSI B31.1 piping codes. Valves shall be appropriate for the pressures and temperatures of each specific application. Gate valves shall not be used for throttling. ANSI Class 125 valves are not acceptable, except for potable water plumbing and circulating water system. All power piping, valves, and fittings shall be insulated using materials consistent with the overall quality and design of the Facility. Insulation shall provide for the expansion and contraction of the piping as will occur during off-line and on-line Facility modes. Seller shall provide adequate pipe support systems to allow pipe expansion, contraction, and appropriate seismic loads, if any.

Supporting straps around pipe flanges or valves are not acceptable. Anchors will be attached to pipes by approved means.

Where pipe runs pass through open penetrations, floors, or walls, either individually or collectively, floor or wall collars or other approved curbing shall be provided. Floor collars shall extend to an approved height.

Each pipe shall be fitted at the ends to prevent the ingress of dirt during transportation and storage.

Care shall be taken during final assembly and commissioning that pipes are cleaned and free of grit, scale, jointing material, and/or tools.



Domestic water piping material shall be in accordance with applicable plumbing code and suitable for the well water chemistry.

Compressed air piping between air compressors and air dryers shall be galvanized carbon steel, copper, or stainless steel. Compressed air piping downstream of air dryers (instrument air) shall be copper or stainless steel. Other compressed air piping downstream of the receiver(s) (service air) shall be stainless steel, galvanized carbon steel, or copper. HDPE may be used for any underground compressed air piping, if approved by Purchaser.

Instrument air branches shall be taken from the top of the mains. Service air branch pipe to points of use shall terminate in positive locking Schrader-type hose coupling.

Piping may be routed on overhead pipeways or sleeperways; it may be supported from the building structure using pipe supports or rod hangers; or it may be buried. Space for electrical and instrument conduit runs shall be provided on the pipeways and sleeperways as required. Underground piping shall be provided with adequate corrosion protection, if required. Fire water loop piping and potable water piping shall normally be routed underground.

All steam lines shall be provided with means of gravity drainage.

Carbon steel lines 2 inches and smaller shall be Schedule 40 minimum. For the 2-inch and smaller alloy steel lines, the minimum pipe wall thickness shall be calculated based on design conditions.

Minimum pipe size shall be ½ inch, except for connections to equipment. Pipe sizes 1-1/4 inches and 5 inches shall not be used except for connections to equipment.

Pipe wall thickness calculations shall be based on the lowest strength component in the system, considering all factors, including the possibility of pipe and fittings having different maximum allowable stress values, and/or manufacturer’s minus tolerance.

Individual pipeline material classifications shall be developed for each class of service. These material classifications shall define the valves, pipe, fittings, flanges, gaskets, and bolting to be used.

Welded piping 2 inches and smaller shall be socket-weld construction, and welded piping 2-1/2 inches and larger shall be butt-weld construction. All threaded piping shall be Schedule 40 minimum. Maximum line size for threaded connections shall be 2 inches.

Piping systems and components shall be stress analyzed, if required, for thermal flexibility, support, pressure, vibration, seismic, fluid or gas flow reactions, and environmental factors, including effects on equipment.

Piping flexibility shall be obtained through pipe routing or expansion loops unless limitations of space or economics dictate the use of flexible connectors.



Expansion loops, when installed in a horizontal plane, may be offset vertically to clear adjacent piping. Flexible connectors are to be used only when it is not feasible to provide flexibility by other means.

The piping flexibility analysis shall consider the most severe operating temperature condition sustained during startup, normal operation, upsets, or shutdown. The analysis shall be for the maximum temperature differential. The effect of installation temperature and solar temperatures shall be considered in determining the maximum temperature differential. Analysis shall include relief valve opening and stop valve closure.

As a minimum, computer analysis shall be performed on all piping over 250°F or piping subject to dynamic transients.

Seller’s pipe stress engineer shall verify proper installation and setting for all pipe supports (1) before initial heat up, and (2) during initial operation at full plant load or other maximum operating conditions (where possible).

6.6.1. Piping Materials

All pipe-work shall be designed, fabricated and tested according to the requirements of the approved standard as required by this Technical Specifications.

The material of the piping shall be equal to or better than the following technical requirements.

For design metal temperature up to and including 750°F, carbon steel (including plate material) shall be used.

For design metal temperature between 750°F and 990°F, Type P22 alloy steel shall be used.

For design metal temperature above 990°F, Type P91 alloy steel shall be used.

The outside of the embedded pipes shall be protected by coatings.

Underground piping systems may use PVC or HDPE pipe where appropriate based on design conditions. Buried steel pipe shall be coated and wrapped and cathodic protection should be considered as required by the soil conditions. Carbon steel bolts for mechanical joints shall be wrapped. Cast iron valves may be used for wastewater, potable water, and fire protection only.

Lubricating oil piping shall be made of A53 (ASME) or equivalent material, with Schedule 40 minimum pipe thickness or equivalent standard thickness. Pressure piping shall be of seamless pipe. The pipeline from last filter on the generator oil supply manifold to the generator group connecting point shall be made of stainless steel. The control oil pipeline shall be stainless steel seamless pipe.

The cooling water and fire protection water piping shall be made of carbon steel.



The pipes used for acids or caustic solutions shall be made of anti-corrosive material. The chlorine piping shall also be of anti-corrosive material.

Instrument compressed air piping shall be made of stainless steel. The joints of piping shall be welded and, for thread-type joints, sealed weld shall be applied.

Demineralized water pipe shall be made of stainless steel.

Piping materials under special conditions shall be as follows:

Sodium hydroxide — Stainless steel or semi transparent FRP

Hydrochloric acid — Polyvinyl chloride pipe or FRP

Other chemicals — Polyvinyl chloride pipe or FRP

The materials of the piping leading from drains, vents, and so on to the shutoff valve on the main pipe shall be made of the same material as the main pipe.

Potable water piping shall be schedule 80 PVC pipe or HDPE and fittings with bronze valves except for exterior piping in rack shall be schedule 80 A53 galvanized with 3000# cadmium plated A105 threaded fittings. Potable water shall supply safety showers and eye washes, which shall be furnished for the following locations:

Battery room (s)

Acid and caustic, ammonia or urea storage tank area(s)

Chemical feed storage and metering area

All unwrapped and un-lagged pipes outside buildings which are subject to corrosion, in addition to the normal design wall thickness, shall have an additional corrosion allowance that is sufficient to ensure a minimum service life of 30 years and is, in any case, no less than 2 mm. All other pipes shall have a suitable corrosion allowance for 30 years’ service life.

Piping shall be so arranged as to provide clearance for the removal of any piece of equipment requiring maintenance with a minimum dismantling of piping and for easy access to valves and other piping accessories required for operation.

Overhead piping shall have a minimum vertical clearance of 7 feet 2 inches above walkways and working areas and be of sufficient height above roadways to enable removal of the largest/heaviest equipment from the Facility.

All pipe-work shall be fabricated with appropriate connections used for pressure gauges, thermometers and any other corollary device as required by the plant design. Appropriate connections for Performance Test instrumentation shall also be provided.

No pipe-work shall be run in trenches carrying electrical cables.

Maximum design velocity of fluids through piping shall take into account water hammer, erosion, and pressure drop of fluid in the lines.



Double-wall piping with leak detection shall be provided for underground piping containing hazardous chemicals.

6.6.2. Pipe VelocitiesThe velocity of flow in pipes is not to exceed the following values unless otherwise specifically mentioned:

ft/s

Water lines

General Service Piping including Drinking, fire fighting, raw and 10

Demineralized water lines 10

City Service piping 7

General pump suction lines 3

Air Lines:

Compressed air pipelines 80

Gas lines

Fuel gas supply lines (with insulation to reduce noise levels) 170

6.6.3. Pipe Hangers and Supports

When located outdoors, corrosion-resistant variable and constant springs shall be furnished that consist of all galvanized components except for the spring or coil, which shall be neoprene coated. Rods, clevises, weldless eyenuts, and turnbuckles shall be galvanized. All other hanger components may be painted per the requirements of section on painting.

Piping that normally does not contain liquid and requiring hydro testing shall have pipe hangers designed (lockable) to accommodate hydro testing.

6.7. Valves

Valves shall be installed to meet valve manufacture’s recommendation. For example, valve with vertical actuator shall not be installed with actuator in any other way but vertical.

Nameplates on safety and relief valves shall indicate manufacturer’s name, model number, size, set pressure, capacity, orifice size, materials, and approving authority stamp



symbol. Each safety and relief valve shall be supplied with a test certificate issued by the approving authorities and shall be subject to the Purchaser’s approval.

All valves and valve actuators shall be accessible for operation and maintenance.

Block valves shall be provided at all equipment, except the air-side of rotor air coolers.

Valving and other accessories shall be positioned and physically spaced relative to other equipment so as to allow convenient access for operation and maintenance. Crowding of piping, components, and accessories shall be avoided.

Valves shall be arranged for convenient operation from an appropriate floor level or platform and shall be provided with extension spindles or gearing, as required. Deviations from this design criterion require Purchaser approval before design finalization. Where extension spindles are fitted, all the thrust when opening or closing the valves shall be taken directly on the valve body and all pedestals shall be mounted directly on floor girders or other stationary members. Chain operators are not acceptable. Valves, valve handwheels, and/or valve actuators shall not infringe on Purchaser-reserved spaces or walkways. Valve pedestals shall be of approved design and be fitted with an indicator to show whether the valve is open or closed.

All valves shall be arranged to close when the handwheel is rotated in a clockwise direction when looking at the handwheel from the operating position. The direction of rotation to close the valve shall be clearly marked on the face of each handwheel.

All steam and water valves operating at less than atmospheric pressure shall have inverted Teflon stem packing.

Hand-actuated valves shall be operable by one person. Gear operators shall be provided on manual valves when the rim pull required to open or close the valve is greater than 100 pounds.

Valve materials shall be suitable for operation at the maximum working pressure and temperature of the piping to which they are connected. Steel valves shall have cast or forged steel spindles. Seats and faces shall be of low friction, wear-resistant materials.

Valves in throttling service shall be selected with design characteristics and of materials that will resist erosion of the valve seats when the valves are operated partly closed.

Valves with position stops that limit the travel of each valve in the open or closed position shall have the stops located on the exterior of the valve body to provide clear indication of full open and close positions.

In general, the valves specified shall be standardized to use the same valve type and manufacturer to the extent possible.

Except where otherwise specified or approved, gate valves greater than 3 inches in diameter in high pressure classes will be of the parallel slide type or flexible wedge type, and, when in the fully open position, the bore will not be obstructed by any part of the gate. The internal diameter of valve ends will be the same as the internal diameter of the



pipe. Gate valves in pressure classes 1500 and above, standard port size, will be used whenever suitable. Gate valves in high pressure classes will have butt-welded joints except where otherwise specified or approved.

Valves will not be installed in an inverted position.

6.7.1. Drain and Vent Valves and Traps

Double valving shall be provided for drains and vents in Class 900 or higher piping service.

Drain traps shall be complete with air cock and easing mechanism. Internal parts shall be constructed from corrosion-resistant materials and be renewable. Trap bodies and covers shall be cast or forged steel and be suitable for operating at the maximum working pressure and temperature of the piping to which they are connected. Traps shall be piped to the drain collection tank or to sumps, and condensate shall be returned to the cycle if convenient.

Drain valves shall have cast or forged steel bodies with covers and glands of approved construction. Spindles shall be of stainless steel, and materials shall be suitable for operation at the maximum working pressure and temperature of the piping to which they are connected.

Where valve seats are shrouded, the design of the shroud shall be such as to prevent foreign matter from lodging in the valve seat.

6.7.2. Low-Pressure Water Valves

Low-pressure water valves shall be butterfly type of steel or cast iron construction. Cast iron valves will have cast iron bodies, covers, gates (discs), and bridges; the spindles, seats, and faces will be bronze. Fire protection valves will be UL-approved butterfly valves that meet NFPA requirements.

Low-pressure valves carrying liquids or gases at sub-atmospheric temperatures (e.g., carbon dioxide storage) will be designed to meet ASHRAE and applicable industry requirements for refrigeration piping.

6.7.3. Instrument Air Valves

Instrument air valves shall be ball type of bronze construction, with valve face and seat of approved wear-resistant alloy. An isolation valve shall be provided at each branch point from main headers.



6.7.4. Non-Return Valves

Non-return valves shall be provided on the discharge of all centrifugal pumps (and other pumps that allow backflow) to minimize manual operator actions during system filling, to prevent system backflow/drainage following pump trip or shutdown, and to prevent backflow from desuperheaters (where applicable). Check valves are not required for the closed cooling water pumps. Purchaser approval is required for any deviations to this requirement.

6.7.5. Motor-Actuated Valves

In general, the Facility shall be designed to minimize the manual actions required by plant personnel during startup, shutdown, and normal operation, and to conform to the level of automation required for remote start-up and operation. . Seller shall review system design with Purchaser during detailed design to assure this requirement is satisfied. Air-operated valves may be used in lieu of motor-operated valves with prior approval of Purchaser.

Motor-actuated valves will be fitted with both hand and motor operating gear. Motor actuators will include torque switches to stop the motor automatically when the valve gate has reached the "full open" or "full closed" position. The motor actuator will be placed in a position relative to the valve such that there is no leakage of liquid, steam, or corrosive gas from valve joints onto the motor or control equipment.

The hand and motor actuation mechanisms will be interlocked so that the hand mechanism is disconnected before the motor is started.

Motor actuators will be provided with approved seating control consisting of a slipping clutch or other torque limiting device that limits seating force to an acceptable level.

6.7.6. Control Valves

Control valves in throttling service will generally be the globe-body cage type with body materials, pressure rating, and valve trims suitable for the service involved. Other style valve bodies (e.g., butterfly, eccentric disk) may also be used when suitable for the intended service. Block valves shall be provided upstream and downstream of all modulating control valves. Bypass valves shall be provided except where bypass valve use is impractical or presents a potential safety hazard, as approved by Purchaser.

Control valve actuators shall be the pneumatic-spring diaphragm or piston type. The actuator shall be sized to shut off against at least 110% of the maximum shutoff pressure. Actuators shall be designed to function with instrument air pressure ranging from 60 to 125 psig.

All control valves shall be sized such that minimum specified flow results in at least 20% stem lift, normal flow results in 75% stem lift, and maximum flow results in 90% stem lift for equal % valves and 85% for linear valves. Parallel, split-range control valves may



be necessary to meet this requirement. The use of a manual bypass valve to meet this requirement is unacceptable.

Valves shall be designed to fail in a safe position.

Control valve body size shall not be more than two sizes smaller than line size, unless the smaller size is specifically reviewed for stresses in the piping and calculations are provided to Purchaser for record purposes.

Where flanged valves are used, minimum flange rating shall be ANSI 300 class. Control valves in 600 class service and below shall be flanged where economical.

Critical service valves shall be defined as ANSI 900 class and higher valves in sizes over 2 inches.

Severe service valves shall be defined as valves requiring anti-cavitation trim, low noise trim, or flashing service, with differential pressures greater than 100 psig.

In general, control valves shall be specified for a noise level no greater than 90 dBA when measured 3 feet downstream and 3 feet away from the pipe surface.

Valve actuators shall use positioners and the highest pressure, smallest size actuator.

Handwheels shall be furnished only on those valves that can be manually set and controlled during system operation (to maintain Facility operation) and do not have manual bypasses.

Control valve accessories, excluding controllers, shall be mounted on the valve actuator unless severe vibration is expected.

Solenoid valves supplied with the control valves shall have Class H coils. The coil enclosure shall normally be a minimum of NEMA 4 but be suitable for the area of installation. Terminations will typically be by pigtail wires.

The DCS shall monitor both “Open” and “Closed” position switches for motor-operated valves and pneumatic-operated control valves used for “On-Off” service. Position switches will not typically be provided for control valves used for “throttling” service. Where required, automatic combined recirculation flow control and check valves or orifices (provided by the pump manufacturer) shall be used for pump minimum flow recirculation control. Modulating or two-position automatic recirculation valves or restriction orifices shall be used as applicable.

Body material and rating shall conform to piping specifications as a minimum.

In no case shall be valve body minimum rating be less than that permitted by piping specifications.

Control valve body size shall be 1-inch minimum. Sizes such as 5-inch body shall not be used. Body sizes smaller than 1 inch may be used for special applications with 3/4-inch-and-under line size, and for pressure regulator services. Reduced ports shall be used as



required. Body size shall not be more than two pipe sizes smaller than the line. Valves for on-off service shall normally be line size.

Valve type and size shall be selected taking into account such factors as cost, operating and design conditions, fluid being handled, rangeability-required allowable leakage, noise, and any other special requirements. For general services, the following types shall be considered:

Cage Guided Globe Valves with balanced or unbalanced type trim.

Single seated globe valves may be either top and bottom or top guided.

Eccentric Rotating Plug Valves of the throttling type.

Ball Valves of the throttling type.

Butterfly Valves with either conventional or shaped discs.

Special Body Types may be considered for special applications such as slurry handling, highly erosive or viscous streams, and noise control.

Characteristics of the inner valve shall be determined by the following system characteristics:

Equal Percentage Characteristics shall normally be used on loops that have large variations in valve pressure drops, fast pressure control loops, and most flow control loops. In processes where no guidelines are available, equal percentages shall be used.

Linear Characteristics shall normally be used for most level control, slow pressure control loops, and loops where the measurement is linear and the variation in the pressure drop across the control valve is small. Linear characteristics shall be used for three-way valves and for two-way valves used in three-way service.

Quick Opening Characteristics shall normally be used for off-on service and for direct connected regulators using low lift.

Valve trim shall be stainless steel minimum, hardened for erosive service. Severe service conditions may dictate consideration of other materials.

Guide bushings shall be of corrosion-resistant material. It is preferred that the guide material be a minimum of 125 Brinell harder than the trim.

Packing glands shall be equipped with flange-style gland followers, secured by two bolts. A lubricator with steel isolating valve shall be provided where packing lubrication is required. Packing shall be Teflon below 450°F and Graphoil for temperatures of 450°F and higher. No asbestos is permissible.

Extension bonnets shall be provided on throttling services above 450°F and below 0°F, or in accordance with the manufacturer's recommendation. On-off control valves shall use high temperature packing in lieu of extension bonnets when practicable.

Piston actuators shall be furnished with pneumatic trip valve, volume tank, piping, and necessary components to lock-in supply air pressure on loss of supply air pressure to actuator to ensure proper failure position.



Split ranging of control valves shall be done electronically using independent DCS outputs. Pneumatic split ranging is not allowed.

Positioners may be electric/pneumatic or smart type. Electric/pneumatic positioners shall have two gauges and a smart type one.

Valve leakage class shall conform to ANSI B l6.104, “Control Valve Seat Leakage.”

6.7.7. Safety and Relief Valves

Safety valves and relief valves shall be provided as required by code for pressure vessels, heaters, and boilers. Safety and relief valves shall be flanged and installed vertically. Piping systems that can be overpressurized by a higher pressure source shall also be protected by pressure relief valves. Equipment or parts of equipment that can be overpressurized by thermal expansion of the contained liquid shall be provided with thermal relief valves.

6.7.8. Instrument Root Valves

Instrument root valves and condensate pots shall be specified for operation at the working pressure and temperature of the piping to which they are connected. Double valving will be provided for instrument taps in Class 900 or higher service. Root valves for Class 600 and lower may be 1/2 inch. All other systems will have ¾-inch root valves.

6.7.9. Float-Operated Valves

Float-operated valves shall be provided with small-bore float-operated pilot valves connected into each system, where necessary, to eliminate water hammer. Floats shall be arranged to operate in a baffle tank, designed to prevent a turbulent water surface around the float.

6.7.10. High-Pressure Valves

Steel valves will have cast or forged steel spindles. Seats and faces will be of low friction and wear resistant.

Valves used for throttling service will be designated to prevent erosion of the valve seats when the valves are operated in a partly open condition.

Valves over NPS 2 inches in size and rated in pressure Class 900 and above shall be provided with pressure seal bonnets. Systems with pressure ratings of Class 900 or greater shall use double valve for vents and drains to the atmosphere. Valves over NPS 2 inches in size and rated in pressure Class 600 and below shall be provided with bolted or welded bonnets “T” pattern, or “Y” pattern bonnetless style design.

Valves under NPS 2 inches in size will be provided as follows:



For Class 600 and under, use bolted bonnet.

For Class 900 and over, use welded bonnet “T” pattern, or “Y” pattern bonnetless style.

ANSI pressure Classes 900 and 1500 flexible wedge gate valves shall be specified with pressure seal bonnet/cover joint, stellited integral or welded-in seat rings, lubricated bearing yoke sleeve (NPS 6 and larger), bolted gland, and the disc provided with stellited seating surfaces.

ANSI pressure Class 600 flexible wedge gate valves shall be provided with bolted gland arrangement, integral or welded-in seat rings, provision for back seating, bolted-ring type body/bonnet joint, and yoke drive sleeve with ball or needle bearings and booster station as described above, except they will not include the bolted ring type body/bonnet joint.

6.8. Insulation and Freeze Protection

All piping subject to freezing shall be freeze protected with electric heat tracing cable as described in the Electrical section. Piping shall be insulated with mineral fiber per ASTM C547, Class 2 for operating temperatures up to 500F and calcium silicate per ASTM C533, Type 1 for higher operating temperatures. Insulation shall be covered with a “stucco” embossed aluminum lagging per ASTM B209, Alloy 3003, Temper H14 (half-hard) with a thickness of 0.016 ±0.003 inches. The insulation and lagging system will provide a cold face temperature of 140°F at an ambient air temperature of 95°F in still air.

Anti-sweat insulation will be flexible elastomeric cellular insulation conforming to ASTM C534.

6.9. Tanks

Large outdoor storage tanks shall be welded or seamless construction. Drains and other design features shall be provided as required to prevent damage to the tank wall during extended outages in subfreezing weather. Tanks shall be sized to provide the required storage volume that accounts for freeze losses.

Demineralized water tanks shall be shop-coated internally with a fused-glass coating. Coated tank material surface profiles shall be suitable for coating application, Coatings shall extend completely under all gaskets, and special provisions shall be made at all plate ends to prevent corrosion (e.g., use of stainless steel edge coat).

Nozzles on water tanks subject to freezing shall project into the tank by a distance sufficient to permit continued operation with an ice layer on the inside of the tank wall.

Maintenance drains near the tank bottom shall be provided for complete tank drainage.

Containment systems shall be provided for all tanks containing potentially hazardous liquids, including ammonia. Leak detection systems shall be provided, as required by



regulations or permits. All tank containment areas shall be furnished with drains and low-point sumps.

Manholes, where provided, shall be at least 24 inches in diameter. Ladders and cleanout doors shall be provided on storage tanks as required to facilitate access/maintenance. Provisions shall be included to allow proper tank ventilation during internal maintenance.

Unless otherwise specified or approved, tanks used for the storage of oil, raw water, treated fresh water, and condensate shall be carbon-steel-plate stiffened and stayed in an approved manner where necessary.

Pipe connections for tanks shall be made to welded pads or reinforced nozzles, the thickness of which shall not be less than 1-1/2 times the diameter of the joint studs. Joint stud holes shall not be drilled through the pads. Pipe connections shall be made with studs and not cap bolts.

Tanks that are to be insulated and lagged shall be provided with external lugs where necessary.

A corrosion allowance of 1/16 inch for carbon steel and low chrome alloys shall be used, except for lined or internally coated tanks.

Overflow connections and lines shall be provided and be at least one pipe size larger than the largest input line or combination of inputs that can discharge simultaneously.

6.10. Heat Exchangers

Heat exchangers shall be provided as components of mechanical equipment packages and may be shell-and-tube or plate type. Heat exchangers shall be designed in accordance with Tubular Exchanger Manufacturers Association (TEMA) or manufacturer’s standards. Fouling factors shall be specified in accordance with TEMA or HEI.

Thermal relief valves shall be provided for heat exchangers as required.

6.11. Pressure Vessels

Pressure vessels shall be designed to ASME VIII standards and in accordance with state and local requirements.

Pressure vessels shall include the following features and appurtenances:

Process, vent, and drain connections for startup, operation, and maintenance

Materials compatible with the fluid being handled

A minimum of one manhole and one air ventilation opening (e.g., handhole) where required for maintenance or cleaning access

Shop-installed insulation clips spaced not greater than 18 inches on center for vessels requiring insulation



Relief valves in accordance with the applicable codes

Vessel capacity consistent with design requirements of the system and not less than required to absorb the maximum anticipated system transients.

Carbon steel tanks shall have a minimum corrosion allowance of 0.06250 inch. Where practical, coated pressure vessels shall be avoided.

6.12. Fuel Gas Supply System

The fuel gas supply system shall include natural gas filtering, compression equipment, and pipeline to accommodate the complete operating range of the turbine(s) without affecting the stable operation of the Facility. The fuel conditioning equipment shall process the fuel to meet the OEM requirements for the fuel (including temperature and pressure) to the equipment.

Fuel gas conditioning system shall include the following equipment:

Electric motor-driven natural gas compressor(s) (if required). Each gas compressor shall service 100% of one combustion turbine and include knock out drum, scrubber, coalescent gas filter, and gas heaters that use waste heat or cycle heat source to ensure that natural gas quality meets the requirements of the CTG supplier while improving overall cycle efficiency

One fuel gas drain tank

Pressure regulating station

Natural gas metering station with bypass

Natural gas heaters (if needed)

The minimum fuel processing standards shall be as follows:

Dry scrubber upstream of the compressors:

Filtration shall be 100% effective for particles 3 microns or larger at design flow rate.

Outlet gas shall contain no more than 0.10 gallon of entrained liquid per million standard cubic feet of gas.

Clean up (coalescing filter) requirements and sizing (one set per combustion turbine)

Two coalescing filters shall be 100% effective for particles 0.3 microns or larger

The two filters shall operate in parallel so that there is no need to shut down the turbine while performing maintenance on one of the filters.

The coalescing filters can handle small slugs of liquids up to approximately 10 gallons.



Each filter shall be sized to handle the flow associated with the turbine operating at full load.

Piping shall be carbon steel upstream of the filters and stainless steel downstream of the filters to the combustion turbines.

If required by the manufacturer, the Seller shall furnish and install equipment necessary to heat the fuel to a temperature acceptable to the combustion turbine manufacture using suitable means within the restriction of the Facility’s Permit.

Wobbe index control shall be provided if, based on the historical fuel supply variations and combustion turbine requirements, it is necessary to have stable operation including prevention of plant tripping.

Seller shall supply individual fuel gas regulators and associated relief valves for the gas consuming components if necessary to prevent exceeding the manufacturer’s maximum allowable supply pressure to such components.

One gas compressor shall be dedicated to each combustion turbine. Gas compressor piping shall enable the use of any gas compressor with any combustion turbine.

The gas compressors shall be provided with suction regulation and bypass, including bypass cooler, and provided to meet the full range of operation for the combustion turbine from minimum to maximum combustion turbine operation.

The fuel gas system shall be designed to supply the total combustion turbine load demands under all ambient conditions. The design shall allow the ability to change out filters and dryers online with no supply restrictions. In addition, the system shall be designed to allow continued operation of a combustion turbine with either gas compressor out for service.

Cathodic protection shall be provided on the gas pipeline to meet PG&E gas interconnection requirements or AGA as applicable.

6.13. Water Source and Treatment System

Adequate supply source shall be available to support year round plant at full load operation.

Source water quality and temperature shall be within each application’s specified requirements.

The makeup water treatment shall be fully automated, instrumented and be provided with redundant pre-filtering system. The water source system shall include but not be limited to pumps, piping, valves, and insulation. The cooling tower (if applicable) makeup water system shall be designed for an instantaneous flow rate equivalent to the maximum water requirements. All pumps shall be sized to maintain an adequate supply of cooling tower makeup water (if applicable) and provide the water flow required by all other plant systems.



The water source onsite storage tank shall be designed to store fire protection water in the lower portion and water for the other systems in the upper portion. The tank shall be sized for 8 hours of facility operation at full load (this does not include the water required per NFPA requirements).

For fire protection, the tank is sized to meet NFPA requirements of two hours of storage capacity for the worst case demand. The upper portion of the tank shall have sufficient storage to meet raw water demand for a safe shutdown of the plant in the event of a loss of off-site water supply. The tank shall be constructed of mild steel. Chlorine or other suitable biocide shall be introduced into the tank on a periodic basis to control biological growth. A recirculation system for the tank shall be provided to ensure adequate mixing of the chlorine or other suitable biocide.

Adequate chemical storage shall be provided for 30 days of operation.

6.14. Demineralized Water

The makeup water treatment system provides quality water for combustion turbine inlet air evaporative cooling (water quality to meet OEM requirements) and any other applications required higher quality water.

The demineralizer system shall be capable of providing a continuous rate equal to at least the plant’s maximum daily consumptive water use (including allowance for regeneration) when operating at maximum peak load. Demineralized water storage capacity shall be sufficient to support a minimum two days of July peak plant service with 24 hours per day combustion turbine(s) inlet evaporator cooling (if provided) and 16 hours per day of power augmentation (if provided) including two start/stop cycles per day. One train of demineralizers shall be considered not operating.

The system shall be fully automated system with critical controls, instrumentation and alarms available both locally and in the control room (able to start, operate and stop unmanned) and logged in the DCS.

All water treatment and regeneration equipment shall be fully enclosed and climate controlled. Building shall be adequately sized and designed for ease of removal of large equipment (including roll up doors, overhead crane, and trolley).

The makeup water treatment system shall consist of and not be limited to a water treatment plant, a raw water tank, a filtered water tank, reverse osmosis (RO) unit, and a demineralized water tank. The quality of the RO water and demineralized water produced by the water treatment system must meet the equipment manufacture’s requirements and EPRI’s recommendations for major equipment such as CTG.

Full redundancy of all chemical pumps and for raw water supply and final product outlet shall be provided.



Chemical storage adequate to support 30 days of full capacity water production shall be provided. All chemical equipment, instrumentation and piping shall be properly shielded in accordance with OSHA requirements.

All pumps shall have suction/discharge flange and bolt connections.

The demineralizer piping arrangement shall be plumbed to allow for use of portable demineralizers.

6.15. Wastewater Treatment and Discharge

The wastewater treatment and discharge shall be designed to process and treat all waste streams in accordance with approved discharge permit requirements.

Equipment drains and floor drains from the chemical feed and water treatment areas shall be collected in chemical waste sumps, which shall be provided with sump pumps. A pH monitor shall be provided in the sumps to monitor the sump water and alarm in the case of a chemical spill.

Wastewater containing hydrocarbons shall be collected separately and treated in an API oil/water separator system that discharges into the chemical waste sump. Areas of potentially significant oil spillage shall be contained within a curbed area (Also refer to the Civil section).

The Seller shall dispose of all wastes from initial chemical cleaning of the piping. Disposal of these wastes shall be in accordance with applicable environmental regulations. The Purchaser shall approve the subcontractor selected to transport and/or dispose of these wastes.

Sewage and storm water collection and transfer facilities or treatment facilities shall be provided if offsite services are not available.

Segregated collection systems shall be provided for oily and chemical wastewater

Neutralization and detoxification shall be provided for all chemicals containing wastewater streams (e.g., demineralizer regeneration, chemical storage, acid cleaning, combustion turbine washing, other wash water)

If “zero discharge” permitted, the specifications shall be reviewed and accepted by the Purchaser.

Vendor will provide two independent sources of waste processing heat.

If “zero discharge” permitted, system will be adequately designed and automated to minimize labor burden of plant staff.

Related equipment designed to have capacity for at least 120% of maximum expected operating requirements.



In addition, 100% redundancy shall be provided for all critical chemical treatment and waste water processing pumps, motors and compressors.

Adequate chemical storage for 30 days of operation shall be provided.

6.16. Sump Pumps

Duplex submersible sump pumps shall be furnished as required. The pumps shall be sized for one pump to operate and the other pump to be spare. The pumps shall be equipped with guide bars for removal and automatic discharge connections.

A control panel complete with auto/manual control, starters, level switches, etc., shall be included. Both pumps shall operate at high-high level.

6.17. Potable Water

Permanent potable water for personnel use, service/fire water supply, and supply to the water treatment system will be from the [local water district. The Seller is to install all potable water supply piping and accessories including all off-site work. The Seller’s scope includes all tie-ins, metering, and piping necessary to bring the potable water to the site. All applicable construction permits are by the Seller.]

The Facility potable water system shall consist of potable water generation and distribution system equipment, including valves and backflow preventors as required. The water distribution system shall be sized to deliver peak demand to each building at a normal pressure of 40 psi and a maximum pressure of 80 psi. Minimum pipe size for building service shall be ¾ inch.

6.18. Fire Protection System

6.18.1. General

The requirements for the design, manufacturing, testing, supply, and delivery of a complete stand-alone fire protection and fire detection alarm and notification systems, and related subsystems, sprinkler systems, fixed water spray systems, fire protection water supply systems, clean agent extinguishing system, standpipe and hose station connections, and hand held portable fire extinguisher, hereinafter referred to collectively as the fire protection system.

Compliance with this Specification does not relieve the Seller of the responsibility of designing, fabricating, and furnishing a system in accordance with National Fire Protection Association (NFPA) requirements and recommendations, applicable State of California Building and Fire Codes, Standards and Amendments, Federal and County Codes, and the local authorities having jurisdiction.



The fire protection systems and related subsystems are intended as a life safety system and equipment protection, and shall be designed and supplied consistent with that objective.

The fire protection systems specified herein is intended for installation by Seller(s) familiar with the design, manufacture, installation, testing and proper application of such systems.

It is not the intent to specify all details of design and construction. The Seller shall ensure that the equipment as been designed, fabricated, erected and tested in accordance with all building and fire codes, standards, recommendations and governmental regulations applicable to the specified services.

The fire protection system specified herein is intended to be operated by the power station operating staff. As such, it is required that the systems be designed and supplied so as to be "user-friendly" to the extent that the Power Plant employees can reasonably be expected to operate them effectively under emergency conditions.

6.18.2. Seller’s Responsibility

The Seller shall be responsible for the design and supply of fully operational fire protection systems. The Seller shall be responsible for all material, labor, logistical and technical resources, and coordination necessary for the complete execution of all particulars of this Specification.

All work performed pursuant to this Specification shall be complete in every respect, resulting in fully operational fire protection systems supplied entirely in accordance with the applicable codes, standards, manufacturer's recommendations, product listings and this Specification. All work which does not conform to these requirements shall be subject to replacement, at the Purchaser's sole discretion, with work which does conform, at the Seller's own expense.

The fire protection systems supplied shall be designed in a consistent manner throughout the premises and all components shall be able to operate to meet all requisite functions in a consistent manner, to the satisfaction of both the Purchaser and the Local Statutory Authorities. It shall be the Seller’s responsibility to interface and receive approval from the authorities having jurisdiction for the proposed fire protection system.

All design drawings and calculations shall be signed and sealed by a State of California Registered Professional Engineer currently practicing engineering in the State of California. In addition to other submittals required by this Specification, the Seller shall provide submittal packages for transmittal to the Local Authorities having Jurisdiction for review, comments and approval of the various fire protection designs, equipment and installations.



6.18.3. Fire Protection Master Plan and Design Basis

The Seller shall be responsible for preparing a Fire Protection Master Plan and Design Basis. This shall consist of as a minimum the following documents:

a. Building and Fire Codes, and Life Safety Compliance Review Report

b. Fire Risk Evaluation Report

c. Hazardous Area Classification Evaluation

Building and Fire Codes, and Life Safety Compliance Review – The report shall identify and address for each building, pre-engineered and/or pre-fabricated building, equipment enclosure and/or structure, and outdoor process, equipment and storage areas at a minimum the following:

a. Applicable building and fire codes, standards, recommendations and amendments.

b. Building classification, occupancy and permitted construction types.

c. Building height and area limitations.

d. Fire resistance requirements for floors, exterior and interior walls and structural supports.

e. Egress and exiting requirements.

f. Detailed exit analysis and calculations. Prepare exit analysis drawings documenting occupant loads, required exit widths, occupant load distribution and travel distances.

g. Combustible and flammable gases and liquids process equipment and storage fire protection, quantity limitations, and storage requirements.

h. Accessibility requirements.

i. Fire Department access and fire fighting facilities.

j. Occupancy and area separation requirements.

k. Fire alarm and detection systems.

l. Sprinkler/Standpipe and fire hose station requirements (duration, flows, pressures and densities).

m. Fire protection water supply requirements.

n. Emergency power and lighting requirements.

o. Smoke control and ventilation requirements.



p. Elevator Requirements

The Building and Fire Codes, and Life Safety Compliance Review shall be performed by a State of California Fire Protection and Engineering (FPE) Firm experienced in the preparation of fire protection master plans, building code reviews and reports and exit/egress analysis calculations and diagrams.

Fire Risk Evaluation - A NFPA 850 fire risk evaluation shall be initiated as early in the design process as practical to ensure that the fire prevention and fire protection recommendations as described in this document have been evaluated in view of the plant-specific considerations regarding design, layout, and anticipated operating requirements. The evaluation should result in a list of recommended fire prevention features to be provided based on acceptable means for separation or control of common and special hazards, the control or elimination of ignition sources, and the suppression of fires. The fire risk evaluation should be approved by the owner prior to final drawings and installation.

Hazardous Area Classification Evaluation - The basis for classification evaluation shall be NFPA 70 (National Electrical Code [NEC]), NFPA 497, API 500, vendor information and other standards, as applicable.

All three documents shall be submitted to the local statutory authorities and the Purchaser for review, comment and approval.

6.18.4. Codes, Standards and Recommendations

The fire protection systems shall be designed in accordance with the specified codes, standards and recommendations, all applicable statutory requirements and amendments, and the EPC Specifications.

The specified codes, standards and recommendations shall include:

Local Adopted Codes, Standards and Amendments

The local building and fire codes, standards, recommendations and amendments to be used shall be determined during the Contractors Building and Fire Codes, and Life Safety Compliance Review.

National Fire Protection Association (NFPA) Codes, Standards and Recommendations

a. NFPA 10, Standard for Portable Fire Extinguishers.

b. NFPA 12, Standard on Carbon Dioxide Extinguishing Systems.

c. NFPA 13, Standard for the Installation of Sprinkler Systems.

d. NFPA 14, Standard for the Installation of Standpipe, Private Hydrants, and Hose Systems.



e. NFPA 15, Standard for Water Spray Fixed Systems for Fire Protection.

f. NFPA 16, Standard for the Installation of Foam-Water Sprinkler and Foam Water Spray systems.

g. NFPA 20, Standard for the Installation of Stationary Pumps for Fire Protection.

h. NFPA 22, Standard for Water Tanks for Private Fire Protection.

i. NFPA 24, Standard for the Installation of Private Fire Service Mains and Their Appurtenances.

j. NFPA 25, Standard for the Inspection, Testing, and Maintenance of Water-Based Fire Protection Systems.

k. NFPA 30, Flammable and Combustible Liquids Code.

l. NFPA 37, Standard for the Installation and Use of Stationary Combustion Engines and Gas Turbines.

m. NFPA 50A, Standard for Gaseous Hydrogen Systems at Consumer Sites.

n. NFPA 54, National Fuel Gas Code.

o. NFPA 68, Guide for Venting of Deflagrations.

p. NFPA 70, National Electrical Code.

q. NFPA 72, National Fire Alarm Code.

r. NFPA 85, Boiler and Combustion Systems Hazard Code

s. NFPA 90A, Standard for the Installation of Air-Conditioning and Ventilating Systems.

t. NFPA 92B, Standard for Smoke Management Systems in Malls, Atria, and Large Spaces

u. NFPA 101, Life Safety Code.

v. NFPA 204, Standard for Smoke and Heat Venting.

w. NFPA 214, Standard on Water Cooling Towers

x. NFPA 221, Standard for FireWalls and Fire Barrier Walls.

y. NFPA 291, Recommended Practice for Fire Flow Testing and Marking of Hydrants.



z. NFPA 497, Recommended Practice for the Classification of Flammable Liquids, Gases, or Vapors and of Hazardous (Classified) Locations for Electrical Installations in Chemical Process Areas.

aa. NFPA 780, Standard for the Installation of Lightning Protection Systems.

bb. NFPA 2001, Standard on Clean Agent Fire Extinguishing Systems.

6.18.5. Other Codes and Standards

American Petroleum Institute (API) 500, Recommended practice for Classification of Locations for Electrical Installations at Petroleum Facilities Classified as Class I, Division 1 and Division 2.

The following referenced document(s) provide recommendations for fire protection of electric generating plants based on good industry practice and the applicable for the project sections shall be used and implemented (should recommendations shall be changed to “shall”).

a. NFPA 850 – Recommended Practices for Fire Protection for Electric Generating Plants and High Voltage Direct Current Converter Stations.

b. Electric Power Research Institute (EPRI) Document - EPRI NP-4144, Turbine Generator Fire Protection by Sprinkler System, Project No. 1843-2, Final Report 1985.

The specified standards define minimum requirements only. They do not necessarily include all requirements necessary to satisfy the applicable local statutes, as interpreted by the Local Statutory Authorities, or the EPC Specifications.

Unless otherwise indicated, the issue of the specific code, standard or recommendations in effect at the time of the “construction plan submittal to the Local Statutory Authorities” shall apply.

The Contractor shall be subject to the interpretation of the Local Statutory Authorities as final arbitrator of any disputes relative to the applicable statutory requirements. Acceptance of the installed systems by the Local Statutory Authorities is required.

In the event of differences between the requirements of the applicable codes, referenced standards and the EPC Specifications, the more stringent requirement(s) shall apply.

If there are conflicts between the applicable codes and standards and the EPC Specification, it is the Contractor’s responsibility to immediately bring those conflicts to the attention of the Owner for resolution, in writing.



6.18.6. Materials, Equipment and System Components Listings and Approvals

All materials, equipment and system components furnished, shall be new and approved by local statutory authorities (approved for use by the State of California Fire Marshal) and listed by Underwriters Laboratory (UL /ULI) and/or approved by Factory Mutual Research Corporation (FM) for their intended use. All equipment shall be designed and installed in accordance with the applicable codes, standards and recommendations, the manufacturer’s recommendations, and within the limitations of their UL listing and/or FM approvals. The Contractor shall provide evidence of listing and/or approvals of all equipment and combinations of equipment with his submittals.

All materials, equipment and system components for which UL listing categories exist shall be ULI listed for the intended application.

All materials, equipment and system components for which UL listing and/or FM approval is required shall be listed in the current edition of the UL or FM Fire Protection Equipment Directories and shall be delivered to the project site with factory applied, UL and/or FM stickers. Components, which do not meet these requirements, are not acceptable.

Components for which UL listing, FM approval, and the State of California Fire Marshal approval are "pending" are not acceptable.

All system components are subject to the approval of the Purchaser with regard to their fitness for the intended application.

6.18.7. Fire Protection Water Supply and Water Storage

The required fire protection water supply (fire flow and duration) shall be designed in accordance with the applicable codes and standards.

The water supply for fire protection shall be provided directly from a dedicated supply in a combination Factory Mutual Approved water storage tank. The fire water reserve will be based on the minimum required fire protection water flow and flow duration. The plant raw water interface at the storage tank will be located at a point above the guaranteed fire water level based on the largest postulated fire flow per the Fire Protection Master Plan and Design Basis and if the guaranteed fire water quantity can be replaced in a 8 hour time interval as required by NFPA 22.

The tank shall be provided with:

a. Fire protection water low level supervisory alarms and low temperature supervisory alarms both monitored by the plants fire detection and alarm system per NFPA 22 and 72, and the DCS/PLC system.

b. OSHA approved handrails, guardrails and ladders for inspection and maintenance of the tank.



c. A supplemental heating system to maintain the water temperature of the tank above the required NFPA 22 requirements.

d. A Factory Mutual (FM) Approval metal tag indicating that the tank is FM Approved affixed to the exterior of the tank by the tank manufacture.

e. Meeting the requirements as specified within other sections of the EPC Specification.

6.18.8. Fire Pumps

The site shall be provided with two (2) Factory Mutual Approved fire pumps both located within a fire pump house enclosure constructed of masonry construction. The fire pumps shall be sized to meet the applicable code requirements and the largest postulated fire(s) per the Risk Evaluation.

The types of fire pumps that shall be provided are as follows:

a. One (1) 100% electric motor-driven centrifugal fire pump.

b. One (1) 100% diesel engine-driven centrifugal fire pump.

One (1) pressure maintenance pump (jockey pump) shall be provided to maintain pressure in the underground fire protection water main system and also will be located in the fire pump house.

The fire pumps shall be separated by each other by a two (2) hour rated fire barrier wall.

The diesel engine driven fire pump shall be installed with a residential low noise type muffler.

Each fire pump area shall be provided with:

a. An automatic wet pipe sprinkler system.

b. Low temperature supervisory device per NFPA 72.

c. Ventilation system.

All fire pump and sprinkler valves within each fire pump area shall be provided with a valve supervisory (tamper) switch. The use of butterfly valves is prohibited.

The liquid fuel storage tank for the diesel engine driven fire pump shall be of double wall construction with tank leak detection system. The tank shall be able to be refueled from both outside the pump house (external fuel connection with tank level gauge) as well as inside the pump house.



Terminals shall be provided on the controller for remote monitoring and annunciation (individual) by the plant fire detection and alarm system for the following supervisory alarm conditions of the following conditions:

a. Engine running (separate signal).

b. Controller selector switch in off or manual positions (separate signal).

c. Trouble on the controller or engine (This includes critically low oil pressure, high engine jacket coolant temperature, failure of engine to start, overspeed shutdown, battery failure (Battery Set 1), battery failure (Battery Set 2), battery charger failure, and low engine oil or engine jacket coolant temperature).

d. Low fuel oil level in day tank.

e. Day tank leak.

Terminals will be provided on the controller for remote monitoring and annunciation (individual) by the plants fire detection and alarm system for the following supervisory alarm conditions of the following conditions:

a. Pump operating.

b. Power loss (all phases supervised).

c. Phase reversal.

d. Phase failure.

The fire pumps shall be designed and installed such that either fire pump can be taken out of service with out effecting the use and operability of the other fire pump and the pressure maintenance pump.

The design, installation, and testing of the fire pumps shall be in compliance with the requirements of NFPA 20, 70 and 72.

6.18.9. Underground Fire Protection Water Main System and Hydrants

The underground fire protection water main system and fire hydrants shall be arranged around the structures, process areas including outdoor equipment throughout the power plant and switchyard. The size of the loop piping shall be based on the calculated maximum demand and the requirements of NFPA 24 and per the Risk Evaluation.

The underground fire protection water piping will be constructed of a combination of cement lined ductile iron and Factory Mutual (FM) Approved high-density polyethylene pipe (HDPE-Class 200).

The minimum underground fire protection water main pipe sizes are as follow:



a. Underground loop – 10 inch for cement lined ductile iron and 12 inch for HDPE.

b. Laterals to fire hydrants less than 25 feet on a dead end main - 6 inch for cement lined ductile iron and 8 inch for HDPE.

c. Laterals to fire hydrants 25 feet and greater on a dead end main - 8 inch for cement lined ductile iron and 10 inch for HDPE.

Thrust blocks shall be provided for all underground fire protection pipes.

Exception: – Thrust blocks for HDPE pipe can be eliminated with written approval submitted to the Purchaser for review by all the following:

a. Factory Mutual Engineering and Research (FMRE). This document shall include all special requirements by FMRE that need to be provided so that the thrust blocks can be eliminated.

b. Local Statutory Authorities

c. HDPE manufacturer and supplier

The underground loop shall be connected to the stations fire pumps using two parallel lateral underground water mains (primary and back up) with post indicator valves located on both sides of the lateral and between both of them.

Gate (curb box) valves are provided for each yard hydrant to isolate it from the underground loop for maintenance purposes, in the event of mechanical damage, and/or line rupture. The underground loop shall be provided with post indicator valves (PIV’s) to isolate sections so that not more than four (4) fire protection users (i.e. fire hydrants, fixed fire suppression systems, stand pipes, etc.) are out of service due to a single line break. The Seller shall verify if additional isolation controls are required per local code.

Laterals to buildings and outside equipment that have water based fire suppression system shall be provided with outside isolation water control supply valves using PIV’s (with valve supervisory (tamper) switches) to isolate the water supply.

6.18.10. Fire Hydrants

The distance between fire hydrants around the Power Island fire loop shall be a maximum of 250 feet and hydrants shall not located within 40 feet of building structures as required by NFPA 24. Additional hydrants shall be provided so that no exposure is more than 250 feet from the nearest hydrant so that a fire hose can be used.

The fire hydrants shall be provided with two hose connections and one fire pumper suction connection.

The entire design and installation of the underground fire protection water supply main system shall be in compliance with the requirements of NFPA 24 and 291, and the local Statuary Authorities.



6.18.11. Fire Protection and Detection System

The following fire protection and detection shall be provided:

Equipment, Area, and/or Building

Fire Protection Suppression System

Type

Detection or Actuation Devices

Buildings

Control Building Class II hose stations located throughout the entire building, except in the Control Room, battery rooms and electrical rooms.

Manual pull stations located at each exterior exit door

Control Room Double Interlock pre-action sprinkler system

Smoke detectors at the ceiling level and beneath all raised floors

Maintenance Shop (includes Tools / Storage Room and beneath all Mezzanine)

Automatic Wet Pipe Sprinkler System

Warehouse (includes Storage Room and above Interior Roof)


I & C Shop Automatic Wet Pipe Sprinkler System

General Office Areas, Corridors, File & Copy Room(s), Conference Room, Janitor and Storage Room and Lunch Room


Both Women’s and Men’s Combination Wash Rooms and Locker Rooms






Type


Telephone and Communication Room


Spot type smoke detectors, including beneath raised floors.

Operator Equipment and Storage Room


Electrical Equipment Rooms

Pre-action sprinkler System – Electric Release

Spot type smoke detectors

Battery Rooms Pre-action sprinkler System – Electric Release

Smoke detectors at the ceiling. Note: If the room is classified per the Fire Protection Master Plan and Design Basis, explosion proof smoke detectors are required.

Electronics Rooms Pre-action sprinkler System – Electric Release

Spot type smoke detectors, including beneath raised floors.

Gas Compressor Building/Enclosure

None Gas Detectors

Gas Processing and Control Equipment

None Gas Detectors

Combustion Turbine Generators

Total flood gas (by generator manufacturer)

Contractor to provide network system. Main panel to annunciate all alarm, troubles and supervised conditions.

Each Combustion Turbine Fuel Gas Conditioning Skid

Spot type heat detectors.

Each Combustion Turbine: CEMS Enclosure.

Spot type photoelectric smoke detectors.

Each Combustion Turbine: Packaged Electronic Control Center.

Spot type photoelectric smoke detectors.





Type


Transformers

Each Main Transformer Automatic Water Spray (Deluge) System. Dry Pilot Sprinklers (Head) looped around each Unit, maximum of 10 ft on center, and in accordance with NFPA 72.

Each Reserve Aux Transformer

Automatic Water Spray (Deluge) System. Dry Pilot Sprinklers (Head) looped around each Unit, maximum of 10 ft on center, and in accordance with NFPA 72.

Chem Feed Equipment Enclosure

Manual pull stations at each exit door. Spot type smoke detectors.

Demineralized water pump enclosure

Manual pull stations at each exit door. Spot type smoke detectors.

Water Treatment Building Automatic wet pipe sprinkler system. Class II hose station located throughout the entire building.

Manual pull stations at each exit door.

Warehouse and Storage Buildings.

Automatic wet pipe sprinkler system. Class II hose station located throughout the entire building.

Manual pull stations at each exit door.

The specified required fire protection and fire detection outlined in the table above defines minimum requirements only. The table may not include all requirements necessary to satisfy the applicable local statutes, as required by the Local Statutory



Authorities, or the EPC Specifications. The Contractor shall be responsible for providing all additional fire protection and fire detection as determined by the Fire Protection Master Plan and Design Basis reviews and analyses.

All outdoor sprinkler system releasing valves subject to freezing shall be installed in a heated weatherproof insulated enclosure. Each enclosure shall be provided with a low temperature enclosure monitoring device monitored and annunciated by the fire alarm control panel in the control room. Heats tracing and/or insulating sprinkler isolation and control valves, releasing valves and sprinkler piping is prohibited.

All valves controlling and/or isolating water for fire protection use shall be provided with valve supervisory (tamper) switches.

All sprinkler system releasing valves shall be externally re-settable without having to remove the front inspection cover. Acceptable sprinkler equipment manufactures are Viking and Grinnell.

All above ground sprinkler piping located outside shall be hot dipped galvanized steel. All sprinkler hangers and rolled grooved fittings and couplings shall be galvanized. Sprinkler pipe hangers for cooling tower sprinkler systems shall be stainless steel including for dry – pilot piping.

The use of butterfly valves to control and/or isolation fire protection water is prohibited.

All valves controlling and/or isolating CO2 shall be provided with valve supervisory (tamper) switches.

Each Class II and Class III fire hose station shall be provided with the following:

a. One 1-1/2 inch adjustable pressure restricting angle valve.

b. One heavy duty FM approved hose reel, suitable for the specified fire hose.

c. One hundred feet of FM approved 1-1/2 inch single polyester jacket, synthetic rubber lined fire hose, with couplings and connections.

d. One 1-1/2 inch fully adjustable hose nozzle rated for Class A or B fires. Hose stations located near electrical equipment shall be provided with nozzle rated for use on electrical fires.

e. One 2-1/2 inch Fire Department Valve Connection

f. Fire hose reel cover

A complement of 20-pound type, portable fire extinguishers rated for Class A, B, and C fires shall be installed in accordance with local building code and NFPA 10. In addition, portable CO2 extinguishers shall be located in areas containing sensitive electrical and telecommunication equipment, such as the control room and the switchgear rooms. One portable wheeled dry-chemical extinguisher will be located in the GT area to provide



extended manual suppression capability. Fire Extinguishers containing water or water-based agent and Listed for Class C shall not be used.

6.19. Fire Detection System

The Main Fire Protection Panel (MFPP), located in plant main control room, shall be integrated fire detection, evacuation signaling and auxiliary function control system:

The system shall be of the multiplex type.

The system shall be capable of providing point identification addressable for each individual fire and supervisory alarm-initiating device.

The system Central Processing Unit (CPU) shall have sufficient system expansion capability to monitor at minimum 200 initiating device circuits/zones.

The sensors of the Fire Alarm Systems shall be addressable.

Acceptable Fire Alarm Equipment Manufactures:

a. Notifier

b. Edwards System Technology

The system shall be designed and equipped to receive, monitor and annunciate all signals from fire and supervisory alarm initiating devices and circuits installed throughout the site including combustion turbine and associated ancillary equipment fire suppression and fire detection systems and equipment. The Seller shall provide remote stand alone fire alarm panels through out the site networked to the MFPP such that failure of the MFPP will not inhibit the operability of any fire protection system from automatically operating. A separate fire alarm control panel shall be provided in the control room to monitor and annunciate all gas detectors.

The fire alarm system shall monitor and annunciate three distinct types of signals:



a. Fire alarms, including signals initiated by manual fire alarm stations, smoke detectors (confirmed signals only), heat detectors, and water flow discharge pressure switches, induct smoke detectors, combustion turbine. Fire alarms shall be audibly and visually annunciated at the Control Room MFPP and shall initiate automatic evacuation signaling, remote signaling and auxiliary control functions as specified.

b. Supervisory signals, including signals initiated by sprinkler valve supervisory switches, supervisory pressure switches, high system air pressure and low system air pressure, low air, supervisory contacts associated with monitored fire pump controllers, fire water storage tank level, temperature, common trouble contacts of monitored subsystems, manual control switches for auxiliary functions and status annunciation contacts for devices controlled by the fire alarm system as auxiliary functions. Supervisory signals shall not initiate automatic evacuation signaling or auxiliary control functions.

c. Trouble conditions, including signals initiated by the system in response to fault conditions detected in supervised circuits and/or components. Trouble conditions shall be audibly and visually annunciated at the Control Room MFPP. They shall not initiate automatic evacuation signaling or auxiliary control functions.

Fire alarm and supervisory alarm initiation circuits shall be Style "A" or "B", as described in NFPA.

Signaling line circuits shall be style "1" or "2" as described in NFPA.

Indicating device circuits shall be "Class B", supervised with end-of-line supervisory components, capable of operating during a single ground condition.

All wiring required for proper system operation, except as specifically allowed herein, shall be electrically supervised for opens and shorts to ground. Wiring faults on supervised circuits shall initiate trouble conditions.

Trouble signals shall be indicated on the MFPP in the Control Room.

Evacuation signaling circuit trouble signals shall be indicated on the MFPP in the Control Room.

Any single open or single ground condition on any non-addressable initiating device circuit or non-addressable auxiliary function circuit, such as the circuits between addressable monitor/control modules and their associated monitored/controlled device(s) shall cause a trouble signal on their associated addressable circuit.

All control components shall be placement supervised such that removal of any module shall cause a trouble signal on the MFPP in the Control Room.



All fire alarm control and releasing equipment, devices and wiring shall be protected against electro-magnetic/radio frequency interference or induced voltages caused by AC power circuits, electrical transformers, motors or switchgear, electronic equipment, fluorescent lighting fixtures, hand held portable radios, cellular phones or other devices.

The system shall be designed and installed so as to be unaffected (with all control cabinet face plates installed and in the open position) by the operation of hand held, portable radios of up to 5 watts, or portable cellular telephones of up to 1 watt, within 12 inches of any system component(s).

All circuits shall be segregated and/or shielded as necessary to eliminate audio and/or electrical crosstalk between circuits. Where necessary, separate, isolated power supplies, shielded equipment cabinets, or other appropriate means of eliminating interference/crosstalk shall be provided.

Combination fire alarm tone horns and stroke lights shall be installed in pairs (one fire and one stroke light) above each manual fire alarm station with additional devices provided as necessary for optimum audibility and visibility.

Fire alarm bells, horns horn strobes, strobes, trouble horns, and chimes shall be installed as determined by the Fire Protection Master Plan and Design Plan.

Horns and strobe lights shall be on separate circuits.

Fire detection warning horns separate from the Facility annunciator shall be stationed in locations throughout the entire Facility. The warning horns shall be audible from any location within the Facility boundary and shall continue to sound until silenced at the central control panel.

Several rotating light or strobe beacons separate from those provided for the Facility annunciator shall be stationed to allow visible indication of a fire condition from any location within the Facility boundary. These beacons shall be clearly visible during daylight or sundown hours.

To allow manual initiation of a fire alarm, manual pull stations shall be distributed throughout the Facility. The manual pull stations shall be equipped with a dual action releasing lever to reduce chances of accidental operation.

6.20. Compressed Air System

The compressed air system shall consist of an instrument air and a station air system.

The instrument air system shall have adequate dryers and filters to meet OEM quality specifications. Two 100% heatless dryers with two 100% filters shall supply dry (-40°F dew point at 125 psig), oil free air for use by control systems and instrumentation.

Use of compressed air supplying the instrument air distribution header (via the instrument air dryer) for such auxiliary functions as purge air (except for instruments) is



discouraged. Instrument air shall be provided in the Facility's instrument/maintenance area.

The station air system shall be a separate compressor and distribution system which provides air for maintenance tools and shall have valved access points at convenient maintenance around the facility. The air shall be dry and clean.

Adequate instrument compressed air storage shall be provided to facilitate emergency shutdown of the plant. The instrument air receiver and piping shall provide a minimum of 3 minutes of compressed instrument air (pressure above minimum instrument requirement) for plant shutdown without instrument air compressor operation.

The major components of each of the Facility's compressed air system consist of the following:

Two 100% or three 50% instrument air compressors and connection for portable compressor

One service air compressor – identical to the instrument air compressor.

One air receiver for each system

Two 100% instrument air dryer and filters for oil removal. Ability to change out compressed air dryer elements and filters on line with no plant curtailments

Instrument air distribution header

Station air distribution header

6.21. Cranes, Hoists, and Trolleys

Maintenance of the combustion turbine and generators will be performed using mobile construction cranes. During the design phase of the project and before any site construction, the Seller shall provide written descriptions for all disassembly and reassembly lifts required for all major scheduled inspections and overhauls of the turbines and generators. This will include descriptions of the use and sizing of fixed and mobile cranes. The Seller shall also provide models or drawings to demonstrate the ability to avoid all fixed interferences while completing all required movements and lifts and the ability of the specified mobile cranes to be driven to the required locations using only the road surfaces and maintenance pads designed for maintenance crane loadings.

All equipment in the plant shall be provided with a convenient arrangement for slinging or handling during overhaul.

Davits will be provided on (but not limited to) for the following:

Combustion turbine inlet filters

CEM platform at the stack

Fixed cranes and hoists will be designed, manufactured, erected, and tested in accordance with the specified standards and codes. All crane structures and associated lifting tackle will be tested at lifting loads 25% in excess of the rating of the crane. Lifting cables will



have enough length to lift loads the entire height without intermediate stops to adjust lifting tackle. Cranes and lifting tackle over 5 tons lifting capacity will be electrically operated and controlled from floor level

Each item of lifting equipment will comply with the minimum requirements of the applicable standards and codes with regard to:

Identification markings

Tests and inspection

Quality/grade of material

Dimensions

Brakes of an approved type will be fitted to the lift, hoist, and to the hoisting, traversing, and dwelling motions of each crane. The brakes will be designed to operate automatically on interruption of the electrical supply to the motors and to arrest and hold, at any position, the greatest load carried by the motor. Brake design will minimize shock loading during application of the brakes. Crane hoists will be equipped with an independent manually operated brake, capable of holding the maximum load lifting capability of the hoist.

A separately mounted “stop” push button (“E-Stop”) will be provided in such a position as to be readily available for use by the operator. The emergency stop push button will trip the main contactor.

Electrically operated hoists will be fitted with automatic self-sustaining brakes. Electrical motors will be rated for at least 40 starts per hour.

6.22. Heating Ventilating and Air Conditioning

HVAC shall be provided for all buildings. The HVAC System shall heat, ventilate and/or air-condition plant buildings and enclosures for personnel comfort, equipment environment protection and/or freeze protection. HVAC System design generally shall comply with ASHRAE Handbooks and Standards.

Electric heaters in air-conditioned areas and ventilated areas shall provide any necessary space heating.

6.22.1. System Function

HVAC systems shall maintain the environmental conditions in terms of space temperature and humidity, air quality, and building pressurization in order to provide efficient equipment operation and comfortable working conditions for personnel.

6.22.2. Buildings and Enclosures

The following discussion applies to buildings, rooms, areas, and enclosures.



Due to the high ambient outdoor temperature conditions, maintenance of indoor environmental conditions shall be accomplished with air conditioning system where ventilation systems are normally used. Areas such as electrical switchgear rooms and battery rooms shall be maintained at temperatures above those typical for air conditioned environments, yet below temperatures equal to or in excess of the outdoor ambient design temperature. Pre-filter and final filters shall be used for all areas that are either air-conditioned or ventilated. Pre-filter efficiency shall be 30% and final filter efficiency shall be 80% based on ASHRAE 52.1-1992 or approved equivalent international standard.

Explosion resistant construction shall be used in all battery rooms where hydrogen may be developed or released.

The fresh air intakes for the control room shall be elevated and separated by at least 3-5 feet vertically and 10-15 feet horizontally. Also, fresh air intakes shall not be located on the same wall as any ventilation discharge from the battery rooms.

All ductwork shall be galvanized steel. The duct system shall include fire dampers, balancing dampers, insulation, flexible connections, etc., and needed for a complete system. Products shall meet NFPA 90A or approved equivalent international standard and fire dampers shall meet UL 555 or approved equivalent international standard. No products used in the duct construction shall exceed the maximum rating of 25 for flame-spread and the rating of 50 for smoke-developed and fuel-contributed obscuration.

A ventilation system shall be provided in the water treatment area. In general, this shall consist of powered roof or wall exhaust fans and sidewall manual intake louvers, as determined by physical arrangement of the facility. All air supplied to ventilated areas shall not be filtered, unless required for equipment protection.

6.22.3. Air Conditioning System

A split packaged air conditioning system(s) shall be installed for rooms requiring air conditioning including the main control room, offices, storage areas and battery room. The system(s) shall provide constant volume air supply with a variable outside air supply capability of 10% - 100% (economizer) to achieve energy conservation. When outdoor air temperature and humidity conditions permit, the system will utilize outside air in lieu of refrigerant for cooling. Each unit shall be provided with a compressor, evaporator coil, detached air-cooled condenser, electric heating coil and a pre-filter and final filter. The HVAC system will continuously operate the year round. For the control room, two 100% capacity HVAC systems shall be provided, one operating, one as standby.

The HVAC split units for the air conditioning system shall include a mixing section with fresh air, exhaust air, and return air dampers, filter section (including pre-filter and final filter), electric pre-heating coil section, cooling coil section, and supply fan section and return/exhaust fan section. The air conditioning system final filter shall meet the requirements of 80% atmospheric dust spot efficiency based on ASHRAE Standard 52.1 or approved equivalent international standard.



Duct mounted electric reheat coils shall be provided for zone temperature control as well as high humidity control.

Careful consideration shall be taken for locating outdoor air intakes and air-cooled condensers away from prevailing wind direction and from airborne sand and dust.

6.22.4. Battery Room Exhaust System

The exhaust system in the battery room shall be operated continuously to maintain negative pressure and to avoid accumulation of hydrogen gas or leakage to neighboring rooms. Ducted exhaust intake shall be directed upward to remove hydrogen accumulated at ceiling and in beam pockets. Discharge air shall exceed the air supply by 15%. The supply air for the battery room shall come from the air conditioning system.

Indoor air temperature shall be kept below 85°F. Exhaust air rate shall meet the requirement of not less than ten volume air changes per hour. Two 50% capacity in-line exhaust fans shall be provided.

Exhaust fans and motors shall be of explosion proof design.

6.22.5. Design Parameters

Control Building HVAC system indoor design temperatures are summarized below:

Room System Type Indoor Environmental Conditions

Control and Maintenance Building rooms, Offices/ I&C maintenance/ CEMS Enclosure

HVAC 75 ± 4°F, 50% RH

Battery room HVAC 85 ± 5°F

Electrical switchgear, switchyard control house

HVAC As required

The indoor environmental conditions shall be met based upon the internal heat gain in the room and outdoor ambient design conditions as listed.

Service Equipment Description

Control room/battery room HVAC Split Packaged Unit 2 x 100%

Switchgear HVAC split packaged Unit

Offices, I&C maintenance room/ and CEMS Enclosure

HVAC Split Packaged Unit

Mechanical maintenance area Wall/roof exhaust, louvers, dampers

Gas compressor building Wall/roof exhaust, louvers, dampers

Electrical building Supply fans, dampers, louvers



Fire pump enclosure Supply fans, dampers, louvers

Mechanical building Supply fans, dampers, louvers

6.22.6. Standards

The following standards or other international standards as approved by the Purchaser shall be used in the design of the HVAC system.

ASHRAE Handbooks (Latest Editions):

— Fundamentals

— HVAC Systems and Equipment

— HVAC Applications

— Refrigeration

ASHRAE Standards:

— 52.1, Method of Testing Air Cleaning Devices Used in General Ventilation for Removing Particulate Matter

— 15, Safety Code for Mechanical Refrigeration

— 62, Ventilation for Indoor Air Quality

— 90.1, Energy Efficient Design of Buildings

ANSI/ASME Standards:

— ANSI/ASME B31.5, Refrigeration Piping

SMACNA Standards:

HVAC Duct Construction Standards, Metal and Flexible

— Round Industrial Duct Construction

— Rectangular Industrial Duct Construction Standards

NFPA Standards:

— 90A - Installation of Air Conditioning and Ventilating Systems

— 90B - Installation of Warm Air Heating and Air Condition Systems

— 204 - Smoke and Heat Venting

IEC Standards:

— 529 - Degree of Protectors for Electrical Equipment

ARI Standards:

— 410 - Forced Circulation Air-Cooling and Air Heating Coils



— 430 - Central Station Air Handling Units

AMCA Standards:

— 210-85 - Laboratory Methods of Testing Fans for Rating

— 500-89 - Test Method for Louvers, Dampers, and Shutters

7. MAJOR ELECTRICAL EQUIPMENT AND SYSTEMS

The plant shall be designed to run down safely to stop condition with no damage to equipment in the event of loss of auxiliary power.

The plant electrical equipment and systems shall be designed to provide a safe, coordinated, cost-effective, reliable, operable, and maintainable power generation and delivery system. The scope of supply shall provide the necessary equipment for delivery of the generated power and energy to the interface points, provide the necessary equipment to support the plant auxiliary mechanical and electrical equipment, and provide the protection and control features for the Project.

The major components of the plant electrical systems shall include the following:

Synchronous generator, complete with excitation system and appurtenances Generator and controls designed to be able to meet all WECC operating requirements.

Bulk hydrogen storage sufficiently sized for six generator purges and fills (if hydrogen cooled generators are provided).

Bulk carbon dioxide storage sufficiently sized for six generator purges (if hydrogen cooled generators are provided).

Generator step-up transformers (GSUs) for the turbine generators.

Isolated phase bus duct or Non-segregated phase bus duct (Section 7.5) for the turbine generators.

Plant electrical auxiliary systems (AC and DC)

Plant switchyard, operating at a voltage to be selected by the Seller, depending on the existing transmission facilities in the vicinity of the location selected for the Project

Transmission line voltage and length to be selected by the Seller, as required, from the plant to the nearest point of connection in the existing transmission system

7.1. Frequency and Voltage Limits

7.1.1. Frequency

In addition to WECC requirements, the facilities shall be capable of continuous operation for the periods defined below.



Frequency Range Minimum Sustained Operation

58.8 to 61.2 Continuous

57.5 to 58.8 10 minutes

7.1.2. Voltage

The Project shall be designed to accommodate continuous operation of the units when the transmission system voltage measured at the switchyard is between 5% of the rated value, subject to reactive power flow level restrictions associated with the units. Additionally, the plant shall be able to operate momentarily (up to 1 minute) for voltage variations of +20% and -10%.

7.2. Auxiliary Equipment

The plant associated auxiliary equipment shall be designed and constructed to comply with the requirements described below.

Control and protection equipment shall comply with the ANSI/IEEE and NEMA standards with respect to permissible variations in frequency and voltage.

The system shall be designed so that the steady state bus voltages shall be within +5% of the nominal value, even though the auxiliary equipment shall be selected with a broader range of operation.

The voltage variation for the auxiliary equipment shall be in accordance with ANSI/IEEE and NEMA standards. Auxiliary equipment shall be able to accept voltage variations of 10% under steady-state conditions and of 20% under conditions of disturbance.

7.3. Synchronous Generator

The generators shall provide their nominal power output within the range of 5% of their nominal voltage, at any operating point within a range of power factor of 0.9 lagging to 0.95 leading. The Seller shall provide information on the output capability of the generators at other power factors outside of this range.

The electric generator associated with the turbine shall be of proven design with large number of units in operation connected to a 60 hertz grid experiencing high reliability record and comply with the ANSI/IEEE standards and their capacities shall match or exceed the nominal output of the corresponding turbine throughout the whole range of operating power factors and voltages specified below, over the full range of ambient temperatures specified. The insulation of the generator stator and field windings shall be non-hygroscopic, Class F type, complying with ANSI/IEEE standards, but having a rated load operating temperature not exceeding that of Class B under any operating condition within the specified output. The global vacuum pressure impregnation process shall not



be utilized for the insulation system. Coils shall be of the B stage type or VPI type individually cured before insertion into the generator.

The generator shall be hydrogen cooled or totally enclosed water-to-air cooled (TEWAC). The generator shall be provided with enclosure suitable for indoor or outdoor operation depending on the arrangement selected. . The cooling system shall be rated such that load reduction of the turbine generator is not required even under extreme ambient temperature conditions.

The quality of the generators and accessories shall be in accordance with International Standardization Organization (ISO)-9001, EN 29001 or BS 5750 Part 1 and [other equivalent international quality standards].

The generators shall be designed in accordance with IEEE standards C50.10 "General Requirements for Synchronous Machines" and C50.13 "Cylindrical Rotor Synchronous Generators” but hydrogen cooled generators shall meet all rated conditions with a maximum cold gas temperature of 46 degrees C. The generators shall be capable of operating under the frequency conditions specified above.

The continuous operating voltage range of a generator shall be of +5% at any load up to full load. The operating power factor range shall be of 0.90 lag to 0.95 lead as a minimum. The generators shall be able to provide full output at the lowest continuous operating voltage and lowest power factor within the specified range.

The generator rotational speed shall be of 3,600 rpm and it shall be designed to support a momentary overspeed arising from a full load rejection, without damage or abnormal vibrations. Generator voltage shall be manufacturer’s standard.

7.3.1. Construction of the Generator

The construction of the generator shall use proven, modern technology, so it will provide reliable, trouble-free operation in accordance with the stated plant life expectancy. The generator shall not be constructed using global VPI (vacuum pressure impregnation) process. Closed air cooled or hydrogen cooled generator shall be supplied with automatic purge system.

The stator core shall be built of thin, high permeability, low-loss, silicon steel segmental punchings with a high interlaminar resistance, thereby reducing the losses caused by eddy currents.

The stator windings shall consist of single-turn bars with their conductors transposed in the slot area.

The rotor body shall be built from a solid block and machined to accept the rotor windings whose ends must be held securely by 18 Mn -18 Cr alloy steel rings. After assembly, the rotor shall be dynamically balanced.



7.3.2. Accessories

The generators shall be provided with all required accessories for an efficient and continuous operation within its whole range of operation, [including closed circuit water-air coolers if required,] bearing oil coolers, lubrication oil pump, RTDs for thermal protection relays, CO2 fire protection system, and H2 detectors (if hydrogen-cooled generators are supplied), etc. Current transformers for instruments and relays shall be provided as needed for all the protection, metering and indication functions.

7.3.3. Generator Neutral Grounding

Generator neutral grounding equipment shall consist of a single-phase, encapsulated dry type distribution transformer with a secondary loading resistor. The resistor and the distribution transformer shall provide high-resistance grounding to the generator system to limit the magnitude of any ground fault current to approximately 10 A.

7.3.4. Excitation Systems

The generators shall be provided with fast-acting high initial response excitation systems of the rotating brushless type or of the potential-source-rectifier type. Brushless exciters will be preferred. A crowbar system shall be provided to allow for negative current in case of pole slip. Each excitation system shall have enough capacity to allow the corresponding generator to operate at its maximum continuous operating voltage and at the rated power factor under all ambient conditions. Ability to change out exciter brushes on-line (if designed with brushes).

Potential-source-rectifier exciters, if supplied, shall be provided with a field circuit breaker and discharge resistor having an inverse voltage characteristic.

The excitation system shall be provided with automatic and manual voltage regulators. The automatic voltage regulator (AVR) shall maintain the terminal voltage of the generator at the value set by the operator, with negligible drift, throughout the whole operating range without instability and will comply with WECC requirements. The manual regulator will be used for test purposes and as a back up in case of failure of the AVR. An automatic follower shall be provided between the AVR and manual regulator so that a bumpless transfer can be made between them.

The excitation system shall have the following features and functions:

Minimum excitation limiter

Maximum excitation limiter

V/Hz limiter

Reactive drop (line drop) compensation

Cross current compensation

Redundant power bridge and controls



AVR failure detection with automatic changeover to the backup channel without the need to trip the unit

Internal electronics diagnosis and failure detection alarm and trip functions as needed

Power system stabilizer - PSS test report shall be prepared and submitted for CAISO approval

All semiconductor components used in the excitation systems shall be conservatively rated and protected from transient surges to ensure reliable operation and service.

Protections included in the excitation systems shall include: over-voltage, over-current, fuse failures of the potential transformers, and power supply failure to the AVR as well as thyristor and pulse failure functions in case of potential-source-rectifier exciters, if supplied.

The excitation system shall operate in conjunction with the turbine starting equipment in case that solid state starting equipment is supplied.

7.4. Isolated Phase Bus Ducts, Non-Segregated Phase Bus Ducts, and Generator Circuit Breakers

The connection between the generator and the GSU transformer bank shall be made via isolated, phase bus ducts with a voltage rating similar or higher than the corresponding generator terminal voltage.

Depending on the scheme selected to supply the auxiliary load of the plant, a generator circuit breaker may also be provided between the GSU transformer bank and the generator. In this case, the GSU and auxiliary transformers shall be energized at all times, enabling the supply of the auxiliaries when the unit is not in service. A tap bus off the main bus shall be provided to feed the primary winding of the unit auxiliary transformer (UAT).

The isolated phase bus shall be fabricated with high conductivity aluminum or copper and shall satisfy the requirements of IEEE C37.23-2003 “IEEE Standard for Metal-Enclosed Bus.” It shall be of the continuous type in which the magnetic fields outside the bus are reduced to a minimum value, with shorting plates at the ends of the buses and at the equipment connections.

The continuous current capacity of the buses shall be adequate to carry the full output of the unit at the lowest operating voltage (95%) and power factor, at all ambient temperatures under direct solar radiation.

If non-segregated phase bus is used, the requirements shall be identical, except those specific to that type of bus.

The momentary (peak) current and thermal (3 second) withstand capabilities of the buses shall exceed the maximum generator contribution during the sub-transient period and



shall also exceed the maximum system contribution limited by the impedance of the proposed transformer, at the maximum transient voltage of 120% of the rated value. It shall also have an additional margin to absorb any increase in the system short circuit level during the life of the plant. The capacities of the taps off the main bus shall exceed the combined currents from the system and from the generator with the same margins.

The generator circuit breaker, if provided, shall have a capability similar to or higher than those of the buses. The interrupting capacity shall be similar to the momentary capability of the buses, at the maximum transient recovery voltage available.

The bus and/or generator breaker shall be provided with current transformers, voltage transformers, and surge protection devices. Cubicles shall be provided for those devices. See section on Generator bus for additional details.

7.5. Plant Electrical Auxiliary Systems

The system shall be designed with the current technical equipment available and generally accepted good engineering practices. The system shall be high resistance grounded with ground indication. The facility shall be easily maintained and designed with an emphasis on high availability, high reliability for continuous operation as a base load station. The system shall be flexible to feed power to various buses within the facility from alternate sources, as needed, when an equipment problem arises. Built-in redundancies and duplicities in power feed arrangement within the plant power distribution shall be included by providing double ended substations, battery back-ups, and uninterruptible power supplies (UPS).

Transformers shall be delta connected, except for the main transformer (GrY/Δ) and 120/208 (GrY) transformers All transformers shall be selected from standard commercially available kVA/MVA ratings for their nominal and force-cooled ratings.

The transformers for double-ended substations shall be fan-cooled, identical to each other and shall be sized to support the loads as follows:

During normal operation with the full-rated tie-breaker open, both transformers shall support the individual loads on the respective buses they feed, leaving capacity margins as specified below for future expansion and operate within the self-cooled rating.

During one source operation with one main breaker open and the full-rated tie-breaker closed, either transformer shall support the combined loads on both buses without exceeding its highest fan cooled capacity, with a 10% spare ampacity margin.

The new facility shall have an individual transformer connected to an individual generator. The plant auxiliary loads shall be divided in a logical fashion. Any multiple units (2-100% pumps, fans, battery chargers, etc.) shall be fed power from two different sources. The cables related to this type of redundancy shall be routed in two different power and control trays to preclude common mode failures.



The design of the system shall include capacity for future load additions by Plant. After the Plant is fully operational, plant shall be left with the following spare capacity minimum.

Power transformers – 10% of highest fan cooled ampacity

MV and LV Switchgear bus ampacity - 10%

MV and LV Switchgear breakers – two (2) spare cubicles per bus with a minimum of 1 CB of each frame size, per bus

MCC bus – 20% ampacity

MCC Units – spare units various ampacity with a minimum of 1 unit of each size/type, for size 1 and 2 starters and CBs

Lighting transformers – 20% ampacity

Lighting panel bus ampacity – 20% ampacity

Lighting panelboard breakers – 20% spare of various ampacity with a minimum of 1 CB of the highest rating, excluding main CBs

Uninterruptible Power Supply – 20% ampacity

UPS panel bus– 20% ampacity

UPS breakers – 10% ampacity

DC batteries - 1.2 Design Margin

DC panel 20% ampacity

DC breakers – 20% spare of various rating with a minimum of 1 CB of the highest rating, excluding the main CB.

7.6. Electrical System Design and Equipment Requirements

In general, the electrical systems and equipment described in this section shall, as a minimum, comply with the applicable requirements of NFPA 70 (National Electric Code) in areas where applicable, such as office buildings, and ANSI C2 (NESC), as well as the applicable equipment standards published by ANSI, IEEE, NEMA, etc. Circuit breakers, switchgear, and MCCs shall be UL approved.

All Facility electrical equipment, including bus, breakers, transformers, motor control centers, etc., shall be designed to withstand the maximum available fault current.

The Seller shall perform an EasyPower study on the electrical system, and shall provide the study to the Purchaser. A preliminary study shall be done before any equipment purchase. A final shall be done when complete data on furnished equipment is available.

During all operating conditions with all electrical power distribution equipment in service (e.g. no tie breakers closed) other than during the starting of large motors, the voltage at motor terminals shall be maintained between 90% and 110% of motor rated voltage. Temporary voltage drops during motor starting shall not extend below [80]% of the motor rated voltage at the terminals of the largest motor on the buses being started, and



non-starting motors on the same bus shall not have a bus voltage of less than 90% of rated voltage.

All electrical ac auxiliary systems (medium & low voltage) must adequately mitigate arc-flash hazards as addressed in NFPA-70E and meet the following minimal requirements: All breakers, bus, starters, and cables in medium and low voltage switchgear, MCCs,

switchboards, load centers, and panel boards must be able to have maintenance performed solely in a de-energized state, without unacceptable impacts to the rest of the plant (i.e. critical equipment must still be able to run)

Systems shall be designed to limit max arc-flash hazard to 25 cals/cm2 @18 inches from live part

Breakers requiring racking, shall have remote racking devices Other devices/schemes such as maintenance switches and zone protection shall be

explored in addressing these hazards

Arc flash hazard calculations shall be made for all medium and low voltage ac electrical systems down to the 120v level per PG&E calculation guidelines and labeled per PG&E labeling standards.

7.7. Automatic Generation Control Terminal

Breakers and MCCs shall be UL approved.

The DCS shall include an automatic generation control terminal (AGCT) or Remote Intelligent Gateway (“RIG” as defined by the California ISO) which will support remote dispatching of the Facility by the California ISO. Redundant MODBUS data-links between the AGCT and plant DCS, and between the AGCT and the SCADA/EMS RTU shall be provided. The AGCT must comply with the California ISO’s “Generation Monitoring and Control Requirements for AGC/Regulation Units”, as found on their web page at http://www.caiso.com/thegrid/operations/gcp/requirements.html. Additional capabilities may be allowed, as approved by the California ISO.

Following is an example of an AGCT system description. The Facility shall include a system that shall contain similar features. The Automatic Generation Control Terminal (AGCT) shall be equipped as follows:

1 Communications port – DNP 3.0 protocol

1 Configuration and Maintenance Terminal

1 V.32, 9600 baud (DNP 3.0 port)

1 Remote programming port with the fastest available dial up modem (supervised by SCADA signal to enable remote access capability)

Analog Input Points, Solid State Multiplexors, and Precision Scaling Resistors (as required)

Analog Reference Power Supply (as required)


http://www.caiso.com/thegrid/operations/gcp/requirements.html


Contact Input Points, MCD Status (as required)

Analog Output Points, +/-1ma or 4-20 ma (as required)

8-position Sliding Link Terminal Blocks (as required)

Service and Maintenance manuals (for Purchaser’s use)

Power Input 120VAC

NEMA 1 Enclosure with Full Height Doors Front and Rear

The AGCT also has the following additional requirements:

Additional Communications Ports shall be provided to directly input Watt/Var hour and Watt/Var instantaneous input information from all meters. This information shall be relayed via modbus port to Plant control system.

Two communication ports, one master, one slave, shall be provided for communications with the Local Utility RTU.

Two communication ports, one master, one slave, shall be provided for communications with the Plant control system.

Additional Communications Ports with modems as necessary for Utility or California ISO requirements.

In general, the following signals shall be provided:

MW, MVAR, MWh, MVARh, for each generator and for auxiliary power used.

Substation Frequency and Voltage

NOx emissions from each source

Breaker status for each generator breaker

Breaker status and alarms for all switchyard breakers

MW , MVAR, and Line Voltage for each transmission line

Total fuel flow, high side fuel pressure, fuel BTU content, and fuel specific gravity

Voltage regulator status (automatic/manual) for each generator

AGC high limit, AGC low limit, AGC plant load (total all generators), AGC in remote

AGC remote Demand

Remote Programming enabled

Other analog and digital inputs and outputs may be required by the California ISO to meet current standards.

Dedicated telecommunications circuits meeting the requirements of the California ISO shall be installed to allow control and monitoring via the AGCT or RIG.

The Seller shall consult with Purchaser to assure the compatibility of the new AGCT system with the requirements of the Dispatcher and/or SCADA/EMS.



Seller shall provide a CAISO certified Data Point Gateway (DPG) in accordance with the requirements of Technical Standard “Monitoring and Communications Requirements For Units Providing Only Energy and Supplemental Energy.”

Seller shall provide a CAISO certified revenue metering system. In accordance with the requirements of Technical Standard

7.8. Generator Bus

Each generator shall be connected by a pre installation tested copper (or tinned copper) low flux design isophase bus, or segregated phase bus for generators less than 70 MVA as described below.

Generator bus shall be provided between the generator and generator breaker, and the generator and GSU for each turbine. A section of tap bus with removable link shall be provided to connect each unit auxiliary transformer (UAT). The removable link shall allow a UAT to be removed from service without permanently losing the CTG. A section of tap bus shall also be provided, as required, for the generator excitation system.

Generator bus connections shall be arranged such that bends in the generator buses shall be minimized, and overall bus lengths shall be as short as practicable

Each section of generator bus shall be self-cooled bus construction.

Bus space heaters shall be supplied on bus sections for condensation control. Expansion joints shall be provided as required to accommodate thermal expansion of the bus.

7.9. Neutral Grounding Equipment

Generator neutral grounding equipment shall be furnished with each generator bus.

7.10. GSU Transformer Bank

The generator shall be connected to individual GSU transformer to increase the voltage of the generated power and energy from the generator terminal voltage to the power system transmission voltage. The transformer shall be designed to IEEE and ANSI Standards and shall be rated with a capacity that allows full output of the total of the individual units through the operating range of power factors and voltages at all ambient temperatures at the facility site, but in no case at a power factor less than 0.9. The rated capacity of the transformer shall be stated for a 65C average winding temperature rise over 40C ambient. If the supply scheme for the plant auxiliary load is such that there is a possibility that auxiliary power is not taken from the generator bus of a unit at any given time, the capacity of the corresponding main step up transformer shall be selected to allow delivery of the gross output of the unit to the power system under the conditions specified above.



The GSU transformer bank shall be oil-filled and forced-air cooled designed for generator step-up voltage operation according to the ANSI Standards C57.12.00. The windings shall be made of electrolytic copper and the core shall be made with grain-oriented high permeability low loss magnetic steel.

Online condition monitoring system (oil and gas analyzer) shall be supplied for each main bank.

The rated voltage of the transformer bank shall be based on the generator voltage and the transmission system voltage. The impedance of the transformer shall be the standard low impedance design selected by the manufacturer but shall not impose a significant restriction in the transfer of real or reactive power to the grid. The impulse test level and power frequency withstand voltages shall be in accordance with ANSI Std. C57.12.00 for the range of operating voltages.

Each transformer shall be mineral oil filled, conservator type, with a no-load tap changer capable of operation from ground level, with visible indication of tap position, capable of padlocking. Manual tap changers shall be provided with two (2) 2-1/2% taps above and two (2) 2-1/2% below rated voltage. All tap positions shall be fully rated for the highest transformer MVA rating.

Transformers shall have standard accessories including but not limited to fault pressure relays, mechanical pressure relief devices, magnetic liquid level gauge with alarm contacts, top oil temperature indicator with alarm contacts, winding temperature indicator with alarm contacts and a combustible gas device. An on line condition monitoring system shall be provided for the gas analyzer and top oil temperature devices. The transformers shall be designed, manufactured and tested in accordance with ANSI, IEEE, and NEMA standards.

Each transformer bank shall connect its generator to a switchyard bay. For all transformers, losses should be minimized at full load operation. The oil inside the transformer shall be isolated from the atmosphere by means of an elevated expansion tank with an enclosed air cell. Transformer Basic Impulse Levels (BIL) shall be based on column 1, Table 4 of IEEE Standard C57.12.00-2000 for Power Transformers.

The CTG main power transformer’s nameplate rating shall be 10% greater than the maximum combustion turbine generator rating at the fan rating to allow for potential upgrading of the CTG systems.

The oil filled transformers shall be installed such that they will not present a hazard to any surrounding equipment in case of a fire, through the use of physical separation or firewalls. If firewalls are required, adequate space to allow sufficient airflow for proper transformer cooling shall be provided, and NFPA 850 shall be adhered to.

Surge arresters shall be supplied for each high-side bushing. Those arresters shall have ground conductor brought to grade on insulators to facilitate monitoring of leakage current. Surge arresters for main power transformers shall be station class rated and shall coordinate with the BIL of the transformers.



7.10.1. GSU Cooling System

Cooling equipment controls shall be arranged so that no single fault in the control circuitry shall cause a loss of more than one half of the cooling system capability. The transformer cooling equipment controls shall be arranged so that a single remote contact shall shut down all fans, regardless of the mode of operation selected. Manual control switches shall be provided in the control cabinet to allow testing and maintenance of the cooling fans. Controls shall provide for changing the sequence of cooler groups.

7.10.2. Generator Breakers

The generator circuit breakers, if provided, shall be SF6 breakers and designed, manufactured, and tested in accordance with the latest standards of ANSI, particularly ANSI C37.013, and NEMA.

7.11. Unit Auxiliary Transformer

The Facility shall include two (2) factory tested unit auxiliary transformers as described below:

The two individual unit auxiliary transformers shall supply power to station auxiliary loads and both shall be directly connected to the generator bus. Each transformer shall have a medium voltage secondary. The transformer high-voltage windings shall be connected between the main transformer and the generator breaker through a tap in the generator bus, while the secondary windings shall be connected to the medium voltage switchgear through either non-segregated phase bus (NSPB) or cable bus and a main breaker in the switchgear.

Each transformer shall be mineral oil-filled, outdoor type, with a no-load tap changer capable of operation from ground level, with visible indication of tap position, capable of padlocking. Tap changers shall be provided with two (2) 2-1/2% taps above and below rated voltage. Transformers shall have standard accessories including but not limited to fault pressure relays, mechanical pressure relief devices, magnetic liquid level gauge with alarm contacts, top oil temperature indicator with alarm contacts, and winding temperature indicator with alarm contacts, and combustible gas device. Transformers shall be ONAN/ONAF/OFAF with the second stage of forced cooling to be for future load capability. Temperature rise at full load capability of each stage shall be 65C average winding temperature rise over 40C ambient.

The design shall provide two transformers so that the failure of one transformer will not shutdown or limit the output of the station. Each transformer’s output will feed one bus so if a unit auxiliary transformer fails, its bus will be automatically picked up the circuit breaker that connects the two busses. The unit auxiliary transformers shall be accordingly sized. Unit auxiliary transformer losses shall be minimized at full load operation. The oil inside the transformer tank shall be isolated from the atmosphere by means of an elevated expansion tank with an enclosed air cell.



7.12. System Protection

The Facility shall incorporate the values required based on the Insulation Coordination Study, equipment supplier recommendations, and the final design shall provide an adequately protected safe and reliable system.

The protection design of the combustion turbine generators shall include, but not be restricted to, the following:

1 - Beckwith M-3420 Generator Protection System:

— 1 - Volts/Hertz, 24

— 1 - Undervoltage, 27

— 1 - Reverse Power, 32

— 1 - Loss of Field, 40

— 1 - Negative Sequence, 46

— 1 - Breaker Failure, 50BF (low-side generator breaker application)

— 1 - Inadvertent Energization, 50/27

— 1 - Voltage Controlled Overcurrent, 51V

— 1 - Overvoltage, 59

— 1 - Voltage Transformer Fuse Loss, 60FL

— 1 - Generator Ground (95%), 59GN

— 1 - Under/Overfrequency, 81

— 1 - Generator Differential, 87G

1 - Beckwith M-3430 Generator Protection System:

— 1 - Backup Distance, 21

— 1 - Volts/Hertz, 24

— 1 - Undervoltage, 27

— 1 - Reverse Power, 32

— 1 - Loss of Field, 40

— 1 - Negative Sequence, 46

— 1 - Breaker Failure, 50BF (low-side generator breaker)

— 1 - Inadvertent Energization, 50/27

— 1 - Overvoltage, 59

— 1 - Voltage Transformer Fuse Loss, 60FL

— 1 - Generator Ground (100%), 59GN/27TN

— 1 - Under/Overfrequency, 81

— 1 - Generator Differential, 87G



In addition, the protection design shall include, but not be restricted to, the following:

3 Lockout Relays, 86

Power transformers (main step-up and Unit service)

— Auxiliary transformer (isolated phase bus) ground detection

— Transformer differential relay (87T)

— Transformer neutral overcurrent relay (51TN)

— Transformer phase overcurrent relays (51/50), other than main step-up transformers

— Transformer fault pressure relay (63)

— Oil level switch (71Q)

— Oil temperature (26Q)

— Winding temperature (49)

— 3 Lockout relays (86)

Medium and LV (load center) buses

— Bus undervoltage relaying for alarm (4.16 kV bus only)

— Incoming phase and ground time overcurrent (4.16 kV bus only)

— Feeder phase timed and instantaneous overcurrent and ground overcurrent

— Transformer neutral overcurrent

4 kV motors starting motor

— Phase overcurrent (instantaneous and timed)

— Ground timed overcurrent

— Undervoltage and loss of voltage (motor protector)

— Stator overtemperature

— Self-balancing primary differential overcurrent (induction motors greater than 1,500 hp)

— Phase current unbalance (induction motors greater than 1,500 hp)

460 V motors fed from MCC’s

— Phase overcurrent (instantaneous and timed)

— Ground timed overcurrent (motors 20 hp and above)

Panels, transformers, heaters, and miscellaneous loads fed from MCC’s

— Phase overcurrent protection

— Ground timed overcurrent (feeders 100 A and larger)].



7.12.1. Generator Protective Relaying

The following generator protective relays and protection schemes shall be provided:

Phase fault protection, generator differential

Ground fault protection during normal operation and for ground faults close to the neutral

Short reach loss of field with time delay and long reach loss of field

Negative sequence

Dual volts per Hertz with stepped activation

Voltage balance

Generator motoring protection

Synchronism check

Exciter and generator field ground fault protection

Over excitation protection

Transfer trip from switchyard or substation

Stator over temperature protection

Under voltage protection

Generator breaker failure protection

Lockout relay for generator breaker trip

Start-up over current relay

7.12.2. Generator Bus and Transformer Protective Relaying

Protection for the generator bus and main power transformers shall be provided by the same relaying systems used to protect the generator against phase faults and ground faults which include:

Differential (87B)

Neutral overvoltage (59N)

7.12.3. Main Power Transformer Protective Relaying

At a minimum, the following main power transformer relays and protection schemes shall be provided:

Main power transformer, generator breaker, and generator bus zone differential relaying

Fault pressure relaying

Mechanical fault pressure relief device



Transformer differential relays, primary

7.12.4. Auxiliary System Relaying

The auxiliary system shall be protected including by relaying as listed below:

Unit auxiliary transformer shall be protected by a single 3-phase differential relay

Unit auxiliary transformer shall be high-resistance grounded with ground indication

Unit auxiliary transformer shall have instantaneous and over current protection, as well as differential protection.

Medium-voltage bus supply and tie breakers shall have over current relays, one per phase

Medium-voltage loads shall have zero sequence ground detection

Medium-voltage loads shall have instantaneous and over current protection, one per phase

Manual bus transfer synch-check relaying.

7.12.5. Major Interlocks

The major generator and transformer electrical equipment interlocks include:

The generator breaker cannot be closed unless the excitation system breaker is closed.

The excitation system breaker cannot be tripped by control switch unless the generator breaker is open.

When both main power transformer high side breakers are open, neither can be closed unless its respective generator breaker is open.

When only one main power transformer breaker is closed it cannot be opened until its respective generator breaker is opened.

7.12.6. Lockout Relay Actions

One lockout relay shall be associated with generator protection only, and all trips requiring the opening of the generator breaker and removing excitation shall operate this lockout relay. The operation of this relay will not cause the trip of the combustion turbine.

A second lockout relay shall be provided for the generator to clear the associated substation breakers and shall transfer trip the generator protection lockout relay.



7.12.7. Protective Relays

All protective relays shall be digital-type with industry standard communications port provided with external targets to show relay operation to assist operator in determining which relays have operated.

7.13. Medium-Voltage Bus Duct

7.13.1. Non-Segregated Phase Bus Duct/Cable Bus (as required)

Non-segregated phase bus shall be copper bus insulated with a thermosetting insulation. The non-segregated phase bus duct shall be a self-cooled design. The bus shall be rated to carry the maximum nameplate output of the equipment it serves + 10% continuously under the maximum temperature rises specified by ANSI C37.20.

Vapor barriers or fire stops must be supplied at all building wall/floor entrances to prevent the transfer of indoor and outdoor air as well as maintain the fire rating of any penetrated walls or floor.

7.13.2. Bus Ratings

Ampacity of buses shall be rated for the maximum operating conditions with an additional ampacity margin of +10%.

7.13.3. Cable Bus Duct

Cable bus used in the between each unit auxiliary transformer and the medium-voltage switchgear buses must be factory tested. All cable bus shall be preassembled at the factory before shipment to ensure fit-up dimensions and shall come assembled (if possible).

7.13.4. Bus Ratings

Cable bus shall be sized for the maximum operating conditions with a margin of + 10%.

7.13.5. Conductors

Conductors for the cable bus shall be copper and shall conform to the specifications for medium voltage cable as indicated in this specification. They shall be arranged and transposed periodically such that there is an equal sharing of current between the conductors (and optimized for load balance).



7.13.6. Medium-Voltage System

A medium-voltage auxiliary system shall be provided to feed motors and other medium-voltage loads. This medium-voltage system shall distribute power to CTG electrical auxiliaries (including the CT starting motors) during normal operation, startup, and shutdown. The system shall consist of at least two (2) auxiliary transformers and two switchgear lineups. The switchgear shall be located indoors or in pre-fabricated electrical equipment enclosures complete with lighting, cooling, and heating.

7.13.6.1 System Configuration

The medium-voltage system shall consist of a medium-resistance grounded system powered through a delta-wye auxiliary transformer. The medium-resistance grounded system shall limit ground fault current to 400A.

The medium-voltage system provides power to motors and power center transformers. Motor feeders shall utilize breakers or starters while transformer feeders shall utilize breakers. Relay protection shall be as specified in Section 7.12.4 of this document. Additionally, any motor loads shall input B phase current into the distributed control system to monitor potential overload conditions and to alarm before the trip of the motor. All medium-voltage relaying shall be multi-function. The devices shall be connected via modbus to the plant DCS system for monitoring. All medium voltage breakers and starters shall utilize 125-Vdc control power, and shall be designed to eliminate arc flashing, personnel hazards in accordance with NFPA standards, and shall be designed & located for safe operation, with proper identification, indicating lamps, mechanical racking devices, etc. Lamps indicating breaker status shall also be located next to the associated breaker control switch in the control room.

The design shall minimize the danger of arc flash and the requirement to use full body PPE. An overall study of arc flash potential shall be delivered to the Purchaser and each breaker shall be labeled with the arc flash rating and PPE supplied located in the vicinity of the breaker.

Metering quality CTs and VTs shall be provided on the low side of the unit auxiliary transformers connected to revenue quality four quadrant meters located in the protective relay panel for eventual transmission of data to the California ISO via the AGCT or RIG. Instrument transformers shall have an accuracy of 0.3% or better. Revenue meters shall be ANSI C12.1 metering accuracy and shall be located so as to allow collection of data as required by the California ISO.

7.13.6.2 Operational Requirements

The medium-voltage switchgear breakers and starters shall be metal-clad, draw out, vacuum type, with a copper bus. Two-high switchgear is acceptable.

The use of “Smart Switchgear” (Switchgear with integral remote logic) is acceptable, providing the switchgear supplier has demonstrated proven system suitable for interconnection with the plants DCS system. If used for control and serial linked between



switchgear and plant’s DCS, this system requires redundant fiber optic data paths routed through independent raceway minimizing single failure probability.

All medium-voltage switchgear breakers and starters shall be electrically operated vacuum devices. Control of incoming medium voltage switchgear breakers, main and reserve, shall be provided at the switchgear. Synchronizing requirements for the incoming main and reserve breakers shall include a synchrocheck relay with dead bus sensing capability. All breakers and starters shall typically be operated by remote control from the DCS CRT console. The equipment shall be rated 5000 volts, 3 phase, 60 hertz, and operate at 4160 volts, nominal.

Ring-type current instrument transformers shall be furnished. The thermal and mechanical ratings of the current transformers shall be coordinated with the circuit breakers. Their accuracy rating shall be equal to or higher than ANSI standard requirements. The standard location for the current transformers on the bus side and line side of the breaker units shall be front accessible to permit adding or changing current transformers without removing high-voltage insulation connections.

Voltage transformers and/or control power transformers up to 15-kVA, single-phase shall be mounted in drawout drawers contained in an enclosed auxiliary compartment. Self-contained extendible rails shall be provided for each drawer to permit easy inspection, testing and fuse replacement. A mechanical interlock shall be provided for control power transformers to require the secondary breaker to open before the drawer can be withdrawn.

The Seller shall furnish one set of switchgear manufacturer accessories for test, inspections, maintenance and operation.

Each unit of the switchgear shall be furnished with space heaters for humidity control to prevent condensation of moisture within the switchgear.

7.14. Low-Voltage System

The low-voltage auxiliary system shall distribute power to combustion turbine generator low-voltage Facility electrical auxiliaries during normal operation, startup, and shutdown. The main components are the power center transformers, 480V switchgear, and motor control centers.

The ratings required shall be based on the Seller’s Insulation Coordination Study.

7.14.1. System Configuration

The low-voltage system consists of a 480V system powered from power center transformers. Each power center transformer is fed from the medium-voltage switchgear.



7.14.2. Transformers

Transformers shall be 480 volts. The transformers shall be dry type, with fan cooling. The impedance of the transformers shall be a standard value and shall be selected to allow the use of commercially available power center breakers, molded case breakers, and combination starters while limiting voltage drop on the bus during the starting of the largest motor to 80% of the nominal bus voltage. The low-voltage system shall be designed to avoid the need for current limiting reactors. The transformer shall have standard two 2-1/2% above and below rated primary voltage taps.

7.15. Switchgear

The switchgear buses shall be connected in a double-ended arrangement with a normally open tie breaker.

Low-voltage switchgear shall have a copper bus. The low-voltage switchgear breakers shall be electrically operated, draw out type. The switchgear will be located indoors or in prefabricated electrical equipment enclosures. Control of incoming low-voltage switchgear breakers and the bus tie breaker shall be provided at the switchgear. All 480-V main and tie breakers shall typically be operated by remote control from the DCS CRT console. All feeder breakers to MCCs and distribution panels shall also be electrically operated. The protective system shall include a communication interface to the plant DCS for system monitoring.

Ring type current transformers shall be furnished for instrument transformers. The thermal and mechanical ratings of the current transformers shall be coordinated with the circuit breakers. Their accuracy rating shall be equal or higher than ANSI standard requirements. The standard location for the current transformers on the bus side and line side of the breaker units shall be front accessible to permit adding or changing transformers without removing high-voltage insulation connections.

The use of “Smart Switchgear” (Switchgear with integral remote logic) is acceptable, providing the switchgear supplier has demonstrated a proven system suitable for interconnection with the plant DCS system. If used for control and serial linked between MCCs and plant DCS, this system requires redundant fiber optic data paths routed through independent raceway minimizing single failure probability.

When power is required to two or more identical major equipment items on each generating unit, the power to one of these items shall be supplied from the other bus. Auxiliary equipment shall be fed from the same bus as its associated major equipment. Cables to redundant services must be routed in separate raceway.

Each vertical section shall be furnished with space heaters to prevent condensation of moisture within the switchgear.



7.16. Motor Control Centers

Motor control centers (MCCs) shall be indoor, enclosed, dead-front, freestanding units. All phase buses shall be insulated or isolated copper and shall be plated at all connection points or joints. A silver or tin plated copper ground bus shall be provided, and shall extend the full length of the MCC. MCC load feeders consist of a circuit breaker or the combination of a circuit breaker, control power transformer and magnetic contactor. Minimum starter size is Size 1. Circuit breakers shall be the molded case type. In addition, each 480V combination starter shall be provided with a three-phase thermal bi-metal overload relay. MCCs shall have a minimum short-circuit rating of 42,000 amps symmetrical, and the short circuit value of the system shall be confirmed by calculation in E-tap. Motor control center wiring shall be Class I, Type B, per NEMA ICS 2. 5% spares shall be provided for each starter size used, with a minimum of one spare of each size used per unit. A minimum of 20% spare terminal points shall be provided in each starter. If smart MCCs are used, Class II Type C wiring shall be provided.

Motors connected to 480V power centers and MCCs shall be rated 460V. Motor operated valves shall be fed from MCC starters if the FVR starters are not furnished with the MOVs.

Any remote MCCs shall have NEMA 3R walk-in enclosures supplied with filtered ventilation openings with fans, and space heaters.

Combination starters shall consist of magnetic-only circuit breakers and starters. Each starter shall be furnished with individual fused and grounded control power transformer, 2NO and 2NC, plus seal-in auxiliary interlocks.

The use of “Smart MCCs” (MCCs with integral remote logic) is acceptable, providing the switchgear supplier has demonstrated a proven system suitable for interconnection with the plant DCS system. If used for control and serial linked between the MCC and the Plant DCS, this system requires redundant fiber optic data paths routed through independent raceway minimizing single failure probability.

Space heaters shall be furnished at the bottom of each vertical section of all outdoor motor control centers to prevent condensation of moisture within the enclosures.

7.16.1. Operational Requirements

All 480V power center main or tie breakers shall be electrically operated air circuit breakers. Manual control of incoming 480V switchgear breakers and the bus tie breaker shall be provided locally. Low-voltage electrically operated breakers shall typically be operated by remote control from the DCS CRT console.

Typically, when an MCC load is a component of a system, remote automatic control shall be provided or control shall be available on a local control panel for that system. Also, local control stations shall be provided at motors which are not controlled from the DCS; e.g., sump pumps.



7.16.2. Protection

Overcurrent protection for power center breakers shall be provided by direct-acting solid-state trip relays. At the MCC level, motor circuit protectors shall be used for motor circuits, and non-motor feeder breakers shall be protected by thermal magnetic circuit breakers. The thermal overload relays provided with MCC combination starters shall be wired to trip.

7.17. Alternate Power Source

An alternate power source external to the Facility and sourced from the local substantial power source shall be provided for the essential service AC and DC systems. A meter shall be provided to measure power usage. The alternate source shall be selected by the operator if the standby generator does not start.

7.18. Essential Service AC System

The essential-service AC system shall provide clean, 120V AC, single-phase, 60-hertz power to essential control, instrumentation, and equipment loads that require uninterruptible AC power.

The following items discussed below shall be included in the essential service system.

7.18.1. Uninterruptible Power Supply

The Facility shall include one primary UPS system for the major plant control system. The UPS system shall be supplied with 30% spare capacity above calculated requirements. The output rating of the UPS system(s) shall be 120 V, single-phase, 0.8 lagging PF to 1.0 PF, at 40°C ambient. UPS will be a true AC-DC-AC conversion type consisting of an inverter, with an alternate DC source supplied from the station service batteries, a rectifier and a static transfer switch. The static transfer switch will be connected to a second inverter as the alternate supply. Output of the UPS and the second inverter will connect to a manual maintenance bypass switch to the instrument AC panelboard.

7.18.2. Rectifier

The rectifier shall be used to supply power to the static inverter. The voltage regulation shall be less the ±1% from no load to full load with a ±10% variation in supply voltage. The rectifier shall function as specified with a ±3% variation in supply voltage frequency. In the event of rectifier failure, the first alternate transfer will be to the station battery supply.



7.18.3. Inverter

The inverter shall be of the ferro-resonant design.

The inverter voltage regulation (transient response) shall not exceed the following limits under the range of conditions specified with loads of 0.8 lagging to 1.0 PF.

For steady-state loads, ±2.0% from 0 to 100% full-rated load, 15 to 40°C ambient, and 105 to 140V DC input.

For sudden application or removal of 100% of full-rated load, the change in inverter output voltage shall not exceed ±10% after 0.5 cycle and ±2.5% after 1 cycle

7.18.4. Static Transfer Switch

The static switch shall be single-pole and double-throw. The switch shall be capable of carrying the continuous, short time (overload) and short circuit specified for the UPS system.

The switch shall be used for automatic transfer between the synchronized static inverter and the alternate AC supply. When the normal power supply is lost, the static switch shall transfer to the filtered, regulated, alternate supply within 0.25 cycle. The alternate supply will directly feed redundant DCS power supplies.

A static switch continuity monitor and latch circuit to prevent the static switch from returning to the inverter supply after an internal fault had developed shall be included.

7.18.5. Essential Service 120V AC Distribution Panelboard

One panelboard, 120V single-phase, two-wire, shall be furnished. Fast-acting circuit breakers shall provide overcurrent protection without necessitating operation of the UPS static transfer switch.

7.19. Essential Service DC System

The essential-service DC system provides a reliable source of power for the essential-service AC system and critical control and power functions during normal and emergency Facility operating conditions. The DC systems shall be operated ungrounded except through high resistance ground detectors and instruments.

A DC system shall be supplied for the switchyard independent of the station DC.

The station battery room shall be located indoors in a climate-controlled area to ensure maximum battery life. Battery room floor shall be treated with an acid-resistant floor sealant. Batteries shall be rated by industry standards on the basis of a nominal 24 hour average temperature of 77°F. Class I, Division 1 vent fans exhausting outdoors shall be provided to avoid a buildup of hydrogen and a Class I, Division 1 unit heater shall also be provided. Curbed areas without drains shall be provided surrounding the battery cells for



the containment of acid spills in the event of a cell crack or rupture. An eye wash and shower facility shall be provided for rinsing eyes and skin in the event of acid contact. A monorail or other means shall be included in the design of the battery rooms to assist in removing or replacing cells.

The following items discussed below shall be included in the essential service system.

7.19.1. Batteries

The Facility shall include a minimum of two (2) 125-Vdc battery systems. One battery shall supply the emergency oil pumps, station switchgears, station emergency lighting, and all other dc requirements. The second battery shall support the uninterruptible power supply (UPS) loads. The storage battery shall be provided with a heavy duty type battery rack. The rack shall be arranged in steps so that none of the cells are directly above the others. Battery racks shall have the appropriate UBC seismic rating.

Battery cells shall be the lead-acid type with pasted plate grids of lead-calcium alloy contained in transparent plastic jars. The number of cells shall be 60 for 130V systems. The minimum cell voltage at the end of the duty cycle shall not drop below 1.751 volts/cell so that the minimum battery terminal voltage does not drop below 105V. Sealed, valve regulated batteries shall not be provided.

The duty cycle shall include a minimum of 60 minutes of power for the UPS system at the inverter rating, the CT & ST manufacturer’s recommended time for DC motor loads, 4 hours of emergency lighting, and breaker operating power at the end of the 4-hour duty cycle. In addition to the required duty cycle, batteries shall be sized to include a 25% aging factor, a 20% design margin, and temperature correction factor based on expected battery room temperature limits. Battery bank and charge system designed to support two full load trips within a 3-hour duration. Batteries to have 20 year life.

7.19.2. Battery Accessories

Two sets of the standard battery accessories shall be provided:

7.19.3. Battery Chargers

The Facility shall include two 125-Vdc battery chargers for each battery system. These two chargers feeding a battery system shall be powered from two separate sources of AC power.

Each battery charger shall be sized to furnish 100% of the current required to recharge the battery from discharge condition to the fully charged condition in 24 hours while maintaining the continuous normal steady-state loads. The chargers shall be capable of regulated and filtered voltage operation with the battery disconnected (battery eliminator type), with a maximum ripple of 100 mV rms under these conditions. Battery chargers shall have load sharing features and temperature compensation feature



The battery charger shall have a voltage regulation of ±0.5% from no load to full load with a ±10% supply voltage variation. It shall operate properly over ±5% supply voltage frequency variation. It shall be provided with an automatic load limiting feature that shall limit the output current to 110% of its rated load without tripping the AC or DC breaker or blowing fuses. It shall also be capable of picking up a discharged battery without tripping.

The power supply for each charger shall be 480V, 60 Hz, three-phase.

The battery charger shall be designed to prevent the battery from discharging back into the charger in case of AC power failure or other charger malfunction.

The battery charger shall be equipped with standard generating station accessories, including undervoltage relays, ground detectors, overload protection, adjustable float and equalize charger settings and timers.

Thermal magnetic circuit breakers of suitable current carrying and interrupting capacity shall be used.

7.20. Motors

All motors shall be designed for direct across the line starting and shall not exceed a class B insulation system temperature rise as defined by ANSI C50.41. All motors 10 hp and above shall be provided with motor spaceheaters. Motors shall be of the highest efficiency available for the specified application. Motors shall be ANSI C50.41 compliant. All stator windings shall be copper.

7.20.1. 4000V Motors

Type Horizontal or vertical, single-speed, squirrel-cage, induction.

Voltage rating, phase, frequency

4,000 volt, three phase, 60 Hz.

Horsepower rating 1.15 Service factor motors, not less than 115% of the brake horsepower required by the driven equipment when operating at design conditions, and not less than 100% of the brake horsepower required to operate the driven equipment at its maximum requirements.

Nameplate Shall state the service factor and comply with ANSI C50.41.

Enclosure WPII for outdoor applications and ODP for indoor.

Class of insulation Class ”F” vacuum pressure impregnated. Insulation system shall be sealed in accordance with ANSI C50.41.

Temperature rise of windings In conformance with ANSI C50.41 standards for



(maximum by resistance) Class B insulation with 1.15 service factors.

Bearings Horizontal motors – split sleeve bearings of the oil ring type. A sample drain line shall be provided for obtaining bearing oil samples.

Vertical motors – Kingsbury thrust and ball guide.

Ambient temperature range See this specification and utilize site specific conditions.

Limitations on starts In accordance with ANSI C50.41, a nameplate shall designate the maximum permissible number of starts and the required cooling period when motor is started under conditions of (a) cold rotor and (b) warm rotor (after running continuously at full load for a period of one hour).

Locked rotor (starting) torque at rated voltage and frequency

Not less than 80% of full-load torque.

Pullup and breakdown torques The torque of the motor shall be 15% above the load torque requirement throughout the entire speed range at 85% of motor-rated voltage with 80% pullup torque as a minimum.

Locked rotor current Not to exceed 650% of full load.

Base Soleplates are required.

Sight glasses Sight glasses shall be furnished in place of oil cups on all oil-filled bearings.

Preparation of storage Motors shall be prepared for extended outdoor storage by protecting the motor bearings with either a protective grease covering or liquid preservative. The motors shall be tagged to show that a preservative has been used. The procedure to be followed before motors are placed in operation shall also be indicated on that tag.

Heaters Heaters which total more than 1200 watts in capacity shall be rated for 480 volt AC three-phase and heaters totaling less than 1200 watts in capacity shall be rated for 120 volt ac, single phase. They shall be derated for extended life and shall be sized to prevent condensation at the ambient conditions at specific site.

Grounding Two copper ground pads, diagonally opposite side of the motor with drilled and tapped holes suitable for attaching two-hole NEMA grounding lugs shall be included.

Direction of rotation Motors shall have the direction of rotation marked on a nameplate for the supply voltage sequence of T1 - T2 - T3.

Magnetic center The magnetic center at rated load shall be marked on all motors.

Motor test Motor test shall be performed with motor terminal housing installed on motor.

Air filters Removable dry type complete with stainless steel



filter screens.

Lifting lugs Suitable lifting lugs shall be provided for hoisting motors during installation and for maintenance purposes.

Sound levels Per ANSI C50.41.

Instrumentation Motor winding temperature(s) shall be provided using a minimum of two (2) per phase, 100-OHM platinum RTD(S). External junction box shall be provided for easy termination of these motor winding temperature(s) which shall be connected to the Facility control system for monitoring.

Thermocouples Motors with sleeve and plate type thrust bearings shall have Type K bearing thermocouple. External junction box shall be provided as per above

7.20.2. Low-Voltage Motors

All motors 200 hp and smaller shall be:

Type Horizontal or vertical as required, single-speed, squirrel-cage induction, energy efficient, mill and chemical duty type. Cast iron frames and copper windings only.

Voltage rating, phase, frequency 460 volts, three-phase, 60 Hz, for all motors rated at ½ hp through 200 hp, 115 volts, single-phase, 60 Hz, for all motor ½ hp and smaller.

Horsepower rating The nameplate horsepower rating shall be equal to, or greater than, the requirements of the driven equipment when operating at design conditions and motor shall be able to handle the maximum capability of the driven equipment within their service factor rating. This relation shall be provided for all operating speeds and conditions.

Service factor 1.15

Ambient temperature range Site specific ODP indoors.

Nameplate Shall state the service factor and comply with NEMA MG-1.

Enclosure TEFC totally-enclosed, ventilation, and cooling as applicable to the environment. Explosion-proof motors shall be provided only where necessary to meeting the hazardous location requirements.

Class of Insulation Class F

Temperature rise of windings(maximum by resistance)

In conformance with NEMA MG-1 standards for Class B insulation.



Voltage rating, phase, frequency Voltage rating, phase, frequency

Horsepower rating Horsepower rating

Service factor Service factor

Ambient temperature range Ambient temperature range

Nameplate Nameplate

Enclosure Enclosure

Class of Insulation Class of Insulation

Temperature rise of windings

(maximum by resistance)

Temperature rise of windings

(maximum by resistance)

7.21. Standby Power Generator

The facility shall include one standby emergency power generator (fuel oil or natural gas) with all necessary accessories and auxiliary equipment.

The standby generator shall consist of the following:

One multicylinder, in-line or vee, stationary type liquid-cooled, diesel, engine driver with a standby rating capable of powering loads required for the safe shutdown of the unit in the event of loss of offsite power supply.

The starting system, consisting of: heavy-duty electric driven cranking mechanism, over-cranking protection, starting battery, engine-mounted generator for battery charging, complete with voltage regulator, and starting battery trickle charger

One generator output shall have a circuit breaker and electrical protective devices

One automatic transfer switch with control and sensing devices

The standby generator will be indoors or have a weather enclosure to protect the equipment from the elements

The unit shall be capable of starting either manually or automatically either locally or from the control room and in either case, closing to a dead bus.

Upon receiving a start signal, the unit shall be capable of starting automatically without local attendance, reaching synchronous speed and rated voltage and frequency within 30 sec and be ready to accept load to its rated capacity.



During periodic tests, the unit shall be capable of starting on manual signal, accelerating to synchronous speed and rated voltage within 30 sec., and then accepting loading using a resistor load bank equivalent to approximately 100% of the unit kW rating.

During all loading conditions, the transient voltage drop at any sequence step shall be limited such that the generator voltage is not less than [80] % of nominal voltage, and frequency is not less than 95% of nominal. In addition, the voltage at the generator shall recover to within 90% of nominal voltage and the frequency to within 98% of nominal within 2 sec after each load application.

7.22. Miscellaneous

7.22.1. Communications Section

The communication system shall be protected from onsite and offsite radio and electrical interference including use of two-way radios. Two-way radios and cell phones will be used in the control room. The DCS and electrical components shall be provided taking into account their use.

One telephone and one LAN communications shall be provided in each of the offices, file room, kitchen area, lunch area, conference room, communications room control room operator consoles, DCS room, I&C area; and maintenance area. A minimum of 8 additional phones shall be located strategically throughout the plant

Facility communications shall be comprised of voice/data/video systems. This includes a plant wide paging system, gate and security cameras, gate card readers, internet and LAN connections, emergency siren/horn, DCS communication, phone system and the appropriate communications links between the generating plant and the California ISO for revenue meter data and plant control/data via the AGCT/RIG. The Seller shall design, install, test, and prove systems based on the current standards, codes, and industry guidelines related to the V/D/V systems as listed, but not limited to the following:

NEC including articles 640, 645, 725, 760, 770, 800, 830 and any other applicable articles specific to the situation.

NECA guide to low-voltage and limited energy systems.

NFPA including NFPA 70, 72, 75, 101, 780

NESC containing ANSI/IEEE C2, as they relate to single building systems and their integration into the entire power plant building integration.

ANSI/IEEE standards including 142-1991 or later, 1100-1999 or later and any other applicable standards specific to the situation.

ANSI/TIA/EIA standards including latest of 568A, 569A, 570A, 606, 607, 758, and any other applicable standards specific to the situation.

NEIS – National Electrical Installation Standards



7.22.2. Security

The Seller shall furnish and install a security system as described below which includes security requirements for gate, including signal raceway (video, intercom, card reader, etc.), power, lighting, gate operators, and concrete pedestal for card reader.

A station security system shall be provided and shall conform to the requirements of the Purchaser-supplied design criteria, including card reader access control, color low-light, remotely-operable pan-tilt-zoom multi-camera closed-circuit TV, intercom system, independent automatic gate control for Facility site and switchyard, perimeter detection system for all fencing an d gates on the perimeter of the Facility site and switchyard, and selectable frame rate video recording system. Sufficient cameras shall be provided to allow view of entire site perimeter.

The Facility shall include moveable (remote actuated) security cameras around the perimeter fence and entrance gate(s), which shall be connected to close-circuit TV (CCTV) equipment for viewing in the central control room. In addition, a security camera shall be placed for viewing the control room. The CCTV equipment shall be arranged to view the complete plant site. The security cameras shall be remotely accessible from Purchaser’s offsite general offices.

The security system shall include CCTV video matrix/switcher, and recording facility shall be located in the central control room. The CCTV system shall be integrated with the plant DCS alarm system.

An access control system shall be provided to integrate the security systems and to provide remote access and control. The perimeter detection system output shall tied to the access control system for notification of the activation of the detection system. The CCTV system shall be tied to the detection system via outputs and inputs so that the CCTV system will move the nearest camera(s) to the activated alarm zone. The access control system shall record activity from the card readers and the relay inputs. The access control system shall send notification to a remote central station via a dedicated communication link to be provided by Buyer. The central station shall have the ability to view the on site records of the access control system and the digital recorders live video and stored images.

7.22.3. Panelboards

Panelboards shall be UL-listed and conform to the latest issues of the National Electrical Code and NEMA Panelboard Standard PB 1. Panelboards shall be rated for 480 Vac Service or 120/208 Vac service. A minimum of 20% spare breakers shall be provided. A completed directory card and frame shall be provided on the inside of the door.

7.22.4. Grounding and Lightning Protection System

The Seller shall furnish and install the grounding system, which shall consist of bare, stranded copper cable (if the soil permits) and copper weld rod buried in the soil and spaced in a grid pattern sized as required for safe step-and-touch potentials. Each junction



of the grid shall be securely bonded together by an exothermic weld. The ground grid pattern (size and number of ground rods or ground wells) shall be determined using soil resistivities measured at the Facility site. A sufficient number of ground rods shall be installed and welded exothermically to the grid to assure a low-resistance earth connection. These rods shall be situated throughout the grounding system to minimize voltage gradients that occur during faults.

All structures, conduit, cable tray and electrical equipment shall be grounded per the NEC or applicable state and local standards.

The lightning protection system shall be designed, furnished, installed and tested in accordance with the latest applicable NFPA Standard 780, ANSI/UL Standard 96A, and any other applicable codes and standards.

Grounding and lightning calculations shall be provided to Purchaser

7.22.5. Cathodic Protection System

The Facility shall include an impressed current cathodic protection system for all underground metallic components. This system shall be completely isolated from the electrical ground grid. A study survey and calculations shall be provided to the Purchaser.

The cathodic protection system shall be designed installed and tested in accordance to the latest issue of NACE International, ICEA, NEMA, ANSI, and any applicable local or national codes.

A cathodic protection survey is required before turnover to verify complete equipment protection.

7.22.6. Lighting Systems

The Facility lighting system shall provide illumination for Facility operation under normal conditions, and emergency lighting to perform manual operations during outage of the normal power source, and include all equipment specified herein.

The work shall be performed in accordance with the National Electrical Code (NEC) and applicable local codes in a manner consistent with recognized good practice for power station service.

Interior lighting shall be high power factor fluorescent, and color corrected high power factor hp sodium, depending on the area.

Exterior and road lighting shall be high power factor color corrected high pressure sodium.

Outdoor lighting shall be designed to minimize transmission of light beyond the plant boundary through the use of directed lighting, guarded luminaries, etc. Lighting fixtures



shall be located and adjusted for the maximum useful light output. Accessibility for maintenance shall be considered.

All indoor fixtures shall be controlled at the lighting panel/switches located at the entrance areas. Photo-cells shall control outdoor lighting circuits and shall include bypass switches.

Lighting panels shall be sized with a minimum of 20% future spare capacity. Lighting panels shall be provided with a variation of spare breakers and blank spaces.

Circuits at the distribution panel shall be wired in such a manner that they are balanced within ±15% between the phases.

For normal unit operation, the lighting system shall provide illumination in all facility areas to the levels required by ANSI/IES RP-7.

7.22.6.1 Lighting Transformers

Transformers shall be sized as required for the connected and future loads, enclosed three-phase, 60 Hz, self-cooled.

Lighting transformers shall be rated on the basis of full load of the lighting panel including the future spares/spaces with a margin of +10%.

7.22.6.2 Receptacles

480-Vac, 3-phase, 60A welding receptacles with integral on/off switches shall be located, as a minimum, at grade near both ends of each turbine, and in all remote equipment locations and maintenance buildings, and shall not be located in classified areas.

120-Vac, single-phase convenience outlets shall be duplex, 15A, shall be, as a minimum, located for convenient access in all buildings and control cubicles, and shall not be located in classified areas. “GFCI” outlet ground fault interrupter type with watertight covers are required for all outdoor convenience receptacles. In maintenance areas, 50 ampere and 20 ampere single-phase receptacles are required. In addition, 480-volt 3-phase 100A, welding receptacles with integrated circuit breakers are required.

7.22.6.3 Emergency Lighting

Emergency exit signs shall operate continuously. Exit signs shall identify all exits and shall be visible from all directions of the access route. Exit signs with an arrow indicating the direction of travel shall be used as necessary to direct personnel to the nearest appropriate exit. Exit sign placement shall be such that no point in the exit route is more than 100 feet from the nearest visible exit sign.

The emergency lighting systems primarily consists of lights fed directly from the 125-Vdc station battery for control room, and electrical, and computer equipment room areas.



This system is supplemented by self contained battery pack units and emergency lights. The self contained battery pack units shall be 4-hour rated with nickel cadmium cells. Emergency lighting is required in all operating areas.

7.22.7. Cable and Raceway Systems

Cable and raceway systems shall at a minimum meet regulatory requirements and the following specifications.

5000 Volt Cable

Conductors Copper, Class B stranded, annealed

Insulation material Ethylene-propylene-rubber (EPR), 133% insulation level

Jacket for single or multiplexed cables Per NEC and UL listed as type MV-90 suitable for use in cable tray

Conductor shield Extruded semi-conducting thermosetting compound

Insulation shield Extruded conducting thermosetting compound

Metallic insulation shield Nonmagnetic copper tape

Voltage 5000 volt

600 Volt Power Cable

Conductors Copper, Class B stranded, annealed, with a tin or lead-alloy coating, minimum No. 12 AWG

Insulation material Ethylene-propylene-rubber (EPR), 90C or cross linked polyethylene (XLPE) rated 90C

Jacket for single conductor or multiplexed cables Per NEC and UL listed as type TC

Voltage 600 volt

600 Volt Control Cable

Conductors Copper, Class B stranded, annealed, with a tin or lead-alloy coating, No. 14 AWG

Insulation material Ethylene-propylene-rubber (EPR) or cross linked polyethylene (XLPE), rated 90oC

Jacket for multi conductor cables Per NEC and UL listed as Type TC (No PVC)

Voltage 600 volt

Wire colors for multiconductor cables NEC Table E-2



Instrument Cable

Conductors Copper, stranded 18 AWG, minimum

Insulation material 90oC, fire retardant XLPE

>90C, TFW Teflon tape and Kapton tape over the Teflon

Jacket over each twisted pair or triad Per NEC and UL listed as Type PLTC (No PVC) XX check on jacket material

Shield Each pair individually shielded, overall shield is 1.5 mil aluminum or copper-mylar laminate tape

Copper Drain wire One per shield

Voltage 300 volts

Thermocouple Cable

Conductors ANSI Type E, chromel-constant, or ANSI Type K, chromel-alumel,18 AWG for single pair, 22 AWG for multi-pair

Insulation material <90C, fire retardant XLPE

>90C, TFW Teflon tape and Kapton tape over the Teflon

Jacket overall Per NEC and UL listed as Type PLTC (No PVC)

Shield Each pair individually shielded, overall shield is aluminum or copper-mylar laminate tape

Voltage 300 volts

All of the above cable shall conform to, and equipment tests shall be conducted in accordance with, the latest applicable standards of American National Standards Institute (ANSI), Underwriters' Laboratories (UL), the Insulated Cable Engineers Association (ICEA), the Institute of Electrical and Electronics Engineers (IEEE), and the National Electrical Manufacturer's Association (NEMA), unless otherwise stated herein.

All cables shall meet or exceed flame test requirements of IEEE 1220.

All cable shall be “sunlight resistant” and for use in cable trays (“for CT use”).

Cable with PVC insulation is not allowed.

Instrumentation and thermocouple cable shall be twisted with a minimum twist frequency of 3 inches, or 4 twists per foot.

Voltage transformer and current transformer leads shall be No. 10 AWG minimum.



All control and instrument leads for the external connections shall be brought out to terminal blocks mounted in terminal boxes, control boards, or panel in an accessible location, including all spare contacts.

Cable shall be identified with identification markers at both ends after cables have been permanently routed, positioned and terminated.

Cable shall be installed in compliance with the cable manufacturer's recommendations on minimum pulling temperatures and maximum pulling tension. All cable ends shall be sealed from contamination during the pulling operation, and during storage on cable reels.

A thermal calculation shall be performed and provided to the Purchaser where large concentrations of power cables occur in the duct runs to insure the temperature do not exceed the maximum cable temperature.

Splicing of cables in raceway shall not be allowed. The Seller shall receive approval from Purchaser for any cable that needs to be spliced before the cable is pulled.

A four-tray cable segregation system shall be furnished: Medium-voltage power, low-voltage power, control, and instrumentation. Instrument tray shall be solid bottom while other trays shall be ladder type.

The cable tray system shall be designed, fabricated, and installed in accordance with the latest edition of NEMA Standard Publication No. VE-1 - Cable Tray Systems, load/span class designation NEMA Class 12C. The maximum cable fill on cable trays shall be 40% per the National Electrical Code. All cable trays shall be galvanized steel, except outdoor trays shall be aluminum.

Flat cable tray covers shall be furnished and installed on all instrument tray, and on power and control tray indoors where the tray passes under grating and on all outdoor trays. Covers on power trays shall be raised covers.

Cable trays shall be identified before the installation of any cables. Cable trays shall be identified in a distinct, permanent manner with identification numbers at reasonable intervals in accordance with the Purchaser’s standards.

Wires shall not be run unprotected in the Facility. Wire not run in cable trays shall be run in conduit. The proper size of all conduits shall be determined in accordance with the National Electric Code (NEC).] All trays will be sized in accordance with the number of cables and total fill area of cables that they contain in accordance with the National Electric Code. Junction and pull boxes shall conform to UL Standard UL 50. Galvanized coatings for steel boxes shall conform to ASTM A 525 designation G90 for dry locations and G210 for wet and outdoor locations.

Power and control conduits with wall thickness suitable for use in concrete encased duct banks will be used and supported by pre-fabricated spacers. PVC Schedule 40 conduit may be used for underground duct runs.



All instrumentation and communication cables installed in underground duct banks shall be routed in RGS conduits. Inner duct shall be provided with each run of fiber optic cable over its entire length.

Concrete encased duct banks shall be reinforced under roadways and other areas to withstand heavy equipment forces over the duct during construction and operations.

All duct banks have a minimum slope of 0.25% and arranged to drain toward manholes.

Manholes and handholes shall be placed at distances that facilitate cable pulling without exceeding permissible cable pulling tensions and/or side wall pressures.

Conduits and duct banks shall be installed as required to complete the raceway system. Duct banks shall use bends with large radius sweeps to minimize pulling tensions. Adequate spare (20%) conduits shall be installed in duct banks for future use and each duct run shall include a minimum of one RGS cell

7.23. General Wiring Requirements

Terminal blocks shall be rated 600 volt, 20 amps. A permanent marking strip, identified in accordance with Seller’s wiring diagrams, shall be furnished on each terminal block. At least 20% (two per 12-point terminal block) spare terminal points shall be furnished.

All control wiring internal to panels shall be 600V, Type SIS, No. 14 AWG minimum, copper conductors with Class D stranding. Class K stranding shall be provided where wiring is subject to flexing, such as across hinged panels.

All power wiring internal to panels shall be 600V, No. 12 AWG minimum. Power cable #8 AWG and larger shall have copper conductors, with 90°C, heat, moisture, and flame-resistant ethylene-propylene-rubber (EPR) insulation and Hypalon jacket. The EPR insulation shall meet the physical and electrical requirements for Type I insulation as designated in ICEA S-68-516, Sections 3.6.1 and 3.6.2. Power cable internal to panels which is #10 AWG or #12 AWG shall be Type SIS with copper conductors and Class D stranding.

All wiring internal to panels shall be capable of passing the flame test requirements of UL 44, Section 56.

Wiring shall be terminated using compression-type, ring-tongue terminals which firmly grip the conductor. Both ends and at each terminating point of each wire shall be uniquely identified with permanent, heat shrinkable wire markers.

Splicing of wiring is prohibited. No more than one wire plus one jumper shall be connected to any one terminal point.

All 480V wiring shall be segregated from other control wiring and low voltage devices by means of an insulated barrier.



Only one ground connection shall be provided for each instrument circuit. Ground connection for shield wiring shall be nearest the power source.

All switchgear assemblies shall be furnished completely wired. With the exception of control and AC power buses, all other alarm and control wiring for extension to remote equipment or for interconnection between compartments shall terminate at terminal blocks.

Wiring shall be neatly arranged and clamped securely to panels to prevent movement of breaking. A maximum of 12 wires shall be in a bundle in order to facilitate tracing of wires. Wiring clamps and supports at hinge transition points shall be properly sized to prevent chafing of insulation when the cubicle door is opened and closed. Metal clamps must have insulating inserts between the clamps and wiring. Nonmetallic clamps are preferred.

All signal level cables installed in underground duct shall be in RGS conduits. There shall be an independent raceway system for the telephone/communications system.

7.24. Protective Relay Panel Functional Requirements

The Protective Relay panel shall be located in a conditioned space and shall contain all protective relaying not integral to the switchgears or the CTG protection cubicles.

7.25. Workstations

PC-based workstations (DCS, CEMS, etc.) should reflect state of the art technology and shall be furnished and installed with 100% redundancy for all operator and engineer work stations and operator interface consoles.

7.26. Testing and Checking of Electrical Equipment

Testing for each piece of equipment shall be conducted to ensure normal and safe operation of the Facility. All tests shall be in accordance with applicable ANSI, IEEE, and NEMA standards. Documentation shall be provided to Purchaser before facility turnover showing completed testing and turnover of systems for operation.

7.27. Embedded Work

All conduits embedded in floors, walls, foundations, duct, etc., shall be hot-dipped galvanized rigid steel conduit, which shall conform to ANSI C80.1, “Rigid Steel Conduit-Zinc Coated”. EMT can be used for indoor lighting circuits, in and out of walls, but not in concrete.



7.28. Freeze Protection

If applicable, the facility shall be designed to operate in freezing weather, to go through periods of freezing weather while operating or shut down, without damage, and to maintain any process chemical temperatures. Design ambient temperature for freeze protection and temperature maintenance systems are shown in Appendix N3.

Freeze protection and temperature maintenance of pipes shall be provided and shall be accomplished with straight runs of heat tracing cable attached and covered with Teflon or other thermal insulating material. Heating cables shall be provided for all outdoor piping smaller than 2 inch, tubing, gauges and instrumentation containing fluids subject to freezing. Space heaters or heated enclosures shall be used for items where heating cables and insulation is not practical. Heating and heat tracing required for process fluid temperature regulation will be provided by the system equipment suppliers.

Freeze protection circuits shall be fed from dedicated freeze protection distribution panels that are energized through thermostatically controlled contactors. The freeze protection distribution panelboard, as well as the main breaker, contactor, auto-off-manual control switch, control wiring, and indicating lights, shall be contained in an outdoor weatherproof control panel enclosure. Temperature maintenance circuits shall have a dedicated NEMA 4 panel containing main and branch circuit breakers, temperature control components, and alarms contact outputs. All circuits shall be marked in distribution panels to facilitate location of proper circuit in event of problems. Additionally, P&IDs shall be marked to indicate the location of all individual freeze protection circuits, the location of power feeds, the location of any splices or tees, and any other features that will facilitate maintenance and testing of the system.

Electrical heat tracing system power shall be fed from switchboards to dedicated freeze protection transformers which step the voltage down for distribution through the dedicated circuit breaker panelboard. The voltage shall be maintained at + 10% of the system rated voltage. Each distribution panelboard shall be provided with approximately 20% spare circuits for future expansion.

Freeze protection control circuits shall be designed to switch the entire panelboard on when the temperature falls below 40°F and switch the entire panelboard off when the temperature rises above 45°F. A circuit shall also be provided to alarm if the panelboard is not energized for temperatures below 35°F and to alarm if the panelboard is energized for temperatures above 50°F. Pilot light indicating the circuit is energized and an ammeter showing circuit current shall be located at or near the heat trace distribution panel.

Heat tracing cables shall be designed for operation at a nominal 120 volts ac, single-phase. Heat tracing cables shall be run parallel to the length of the pipe or line and shall not be spiraled. Each run should provide indication that the cables are operating.



7.29. Switchyard

7.29.1. System Description and Scope

The design of the switchyard including equipment, structures, protective relaying, etc. shall be in accordance with the facility requirements and good utility design practices.

The configuration of the switchyard shall be designed to support routine maintenance activities such as main bank insulator washes and switchyard work.

The switchyard shall include all electrical equipment and supporting structures necessary for interconnection into the CalISO system with no single contingency failure of the plant interconnection facilities or the transmission system resulting in a total plant outage.

Major requirements for the switchyard are as follows:

7.29.2. Circuit Breakers

It shall be a ring bus system of circuit breakers (Purchaser’s approval required) in the switchyard. One and one-half breakers are required at each interconnection point to the switchyard. The breakers shall be insulated with SF6 gas and shall be equipped for outdoor installation.

Circuit breaker accessories including current transformers (CTs), auxiliary contacts, space heaters, alarms etc. shall be furnished as required for the installation.

All circuit breakers shall include relaying accuracy CTs for the protective relay schemes and metering accuracy CTs to be used for metering purposes. Metering accuracy CTs shall be as defined below under “Metering”.

7.29.3. Disconnect Switches

There shall be two manually operated disconnect switches in the ring bus for each circuit breaker and one disconnect switch for each circuit entering or leaving the substation. The manual switches shall be used for isolation of circuit breakers and incoming/outgoing lines. The switches are not required to have load break capability. The switches shall be group-operated. The switches shall have auxiliary contacts installed for remote status. The configuration of the switches shall be arranged in a manner that maintains the required air gap clearances in the open position. ANSI phase spacing shall be maintained for all switches.

7.29.4. System Protection

Each circuit entering/leaving the substation shall be furnished with appropriate protective relaying. Lockout relays shall be furnished to accomplish all necessary interlocking.



Each of the circuit breakers shall be furnished with breaker failure schemes. Breakers shall not be furnished with breaker reclose relays and schemes. Lockout relays shall be furnished to accomplish all necessary interlocking.

A small control house shall be included for the switchyard protection relays, battery, and chargers and shall have a conditioned environment.

Synchronizing of all the generators to the utility system is to be done across the MV generator circuit breakers.

7.29.5. Control

The circuit breakers shall be controlled from the plant control house. All circuit breaker disconnect switches shall be manually operated. All circuit breakers shall have two 125-Vdc trip coils. One trip coil shall be powered from the plant 125-Vdc battery and the other trip coil from the switchyard and battery.

7.29.6. Power Metering

Revenue-quality metering systems shall be designed, installed and certified in accordance with the latest conformed California Independent System Operator tariff as can be found on their web site at //www.caiso.com/docs/2005/10/01/2005100114481329995.html. The revenue metering systems shall be capable of collecting and processing real-time data from the generating plant, and transmitting it to the California ISO’s Meter Data Acquisition System (MDAS). The revenue-quality metering system shall consist of the following, unless otherwise approved by the California ISO:

Voltage transformers shall be installed on each phase of each circuit leaving the substation. Each voltage transformer shall meet the requirements of the California ISO as specified in Section 10 of the tariff and the Metering Protocol (including Appendices A-G).

Current transformers shall be installed on each phase of each circuit leaving the substation. Each current transformer shall meet the requirements of the California ISO as specified in Section 10 of the tariff and the Metering Protocol (including Appendices A-G).

Polyphase solid-state revenue quality meters shall be installed to collect and process data, and shall be capable of transmitting the data to the California ISO’s MDAS. Each meter shall meet the requirements of the California ISO as specified in Section 10 of the tariff and the Metering Protocol (including Appendices A-G and Appendix J). The quantities to be collected and processed by the metering system are identified in the California ISO’s tariff and Metering Protocols.

Alternatively, combination metering units containing potential and current elements may be installed in place of separate voltage and current transformers on the high side of the generator step-up transformers. The electrical, mechanical and accuracy characteristics of combination metering units shall be the same as individual VTs and CTs.



7.29.7. Non-Revenue Metering

Shorting-type terminal blocks will be provided to allow instruments to be removed with-out disrupting current transformer circuits.

The accuracy of the switchgear/panel type metering current transformers shall be in accordance with ANSI/IEEE C37.20.1 for low voltage switchgear, and in accordance with ANSI/IEEE C37.20.2 for medium voltage switchgear consistent with current transformer ratio, burden, mechanical and thermal duty. The accuracy of voltage transformers will be 1.2% or better.

The following indications will be provided on the DCS or on the turbine control/relay panels or local panels:

Location of Indications

For Each Generator

Generator Meters/Transducers:

1 - Watt-hour Meter Control Panel, DCS

1 - Watt Transducer

1 - Digital Monitor w/Serial Link DM1:

1 - Generator Watt Output DCS

1 - Generator Var Output DCS

1 - Generator Power Factor Output DCS

3 - Generator Current Output DCS

3 - Generator Voltage Output DCS

1 - Generator Frequency Output DCS

1 - Digital Monitor w/Serial Link DM2:

3 - System Voltage Output Control Panel, DCS

1 - System Frequency Output Control Panel, DCS

1 - Digital Meter, DM4:

1 - Exciter Field Voltage Relay Panel, DCS

1 - Exciter Field Current Relay Panel, DCS

Automatic Synchronizer System: Relay Panel

1 - Synchroscope and Lights

1 - Automatic Synchronizer, 25A

1 – Manual Synchronizer, 25M



Non-revenue metering at the High Voltage switchyard

Facility auxiliary power

Total real power usage of auxiliary loads (watts) 4.16 kV switchgear

Total reactive power usage of auxiliary loads (vars) 4.16 kV switchgear

The following for 4 kV and 480 V load center buses Local indication

Bus voltage, all phases (switched)

Incoming current, all phases (switched)

Current through feeder breakers, one phase

Phase current for motor feeds, three-phase

480 V motor control centers No metering provided

Common trouble alarm for the 125 V dc system. DCS

The following for 120 V ac UPS system Local indication

Inverter input volts and amperes

Inverter output amperes, voltage, and frequency

Inverter alarms

Common trouble alarm for the UPS system. DCS

7.29.8. Steel Structures

Galvanized steel structures shall be supplied to support switchyard electrical equipment and to connect the units to the Switchyard as required. Structure loading shall be in accordance with ASCE-7 and the National Electrical Safety Code (NESC) loads as appropriate. These structures are to conform to the local utility company requirements.

Clearances shall conform to the standard design clearances of the NESC.

Each main power transformer and utility tie connection shall be connected to the switchyard by an overhead line and aluminum bus tube. These lines shall use bare ACSR, AAC or ACSS conductors and shall run from the main power transformers to their respective positions in the switchyard. Transformer termination structures shall be supplied at both ends. Dead-end structures shall be furnished at each transformer position and shall provide adequate clearance over the roadways within the plant. These structures shall be designed to accommodate the full load of the line. The design loads of the line shall be in accordance with the loading specified by the NESC for the site area.



7.29.9. Miscellaneous

The Switchyard shall include all necessary miscellaneous commodities such as cable, conduit, lighting, bus tube, fittings, insulators, surfacing etc., necessary for a complete switchyard installation.

7.29.10. Switchyard Grounding and Lightning Protection

The Facility switchyard grounding system shall meet the requirements of the latest revision of IEEE Standard 80, Safety in Substation Grounding.

The switchyard ground grid shall consist of buried copper ground conductors [and ground rods] connected in a grid configuration. The conductors shall be interconnected with an exothermic welding process. The ground grid shall be connected to the facility grounding system at multiple points. Connections to the transmission lines’ shield wires will be confirmed upon an analysis of the ground grid.

The ground grid shall be sized to keep the calculated step and touch potential to safe levels as defined by IEEE 80. The main conductors shall be sized for a maximum fault current based on expected system conditions.

The Facility shall include lightning protection provided by shield wires and lightning masts. The lightning protection shall conform to IEEE standards and/or industry practices

7.29.11. Stability Study

The Seller shall perform a stability study to ensure that the generators are capable of operating without damage during transient conditions in the switchyard.

8. INSTRUMENTATION AND CONTROL REQUIREMENTS

The instrumentation, control systems, UPS system, and electrical power circuits for critical equipment shall be designed in such a way that no single control system, instrument failure, controller failure, fuse, or circuit breaker shall interrupt the operation of more than one piece of redundant equipment. The plant shall be designed to eliminate common mode failures.

It is required that the number of different control systems be minimized as much as possible. The intent is to simplify maintenance and operation of the plant control systems. This should be considered when selecting the control system for Plant DCS and other control systems. All control consoles (CTG and BOP) shall be of the same manufacturer for the plant main control room.

The DCS and CTG control systems shall be provided with the following features furnished by the supplier:



a. A remote control console/workstation for the CTG (one per CTG) to be mounted in the plant main control room. This console shall provide all the functions of the local control consoles for the CTGs. In addition, it shall be possible to perform all necessary workstation functions (programming, graphic display changes, etc.) from this console.

b. Two color printers to be mounted in the main control room. These printers shall print all alarms, logs, historical data, graphic displays, etc.

c. The CTG control packages shall be serial linked to the Plant DCS. This link will be used for data acquisition and monitoring of the CTGs. In addition, critical control functions will be hardwired to the Plant DCS to allow critical functions to be performed from the Plant DCS.

d. All transmitters and indicators shall be capable of being maintained while the unit is on line and shall be provided with root valves. Root valves are required for critical trip instrumentation. Double root valves shall be provided for high pressure steam and water services.

e. Factory Acceptance Testing of the complete control package shall be performed using Vendor's standard testing procedures. All software logics, hardware, graphics, and alarming shall also be verified during the FAT. The tests shall be performed before shipment. (Purchaser approval of control screens is required)

f. Triple redundant transmitters/switches shall be provided for critical measurements or equipment trips. (# of DCS I/O points – extra I/O)

The CTG and the DCS system power supplies shall be redundant to comply with the single failure criteria.

Turbine stress monitoring shall be included in the CTG control systems.

Mechanical equipment on standby status shall automatically start upon a trip of the operating equipment. All backup pumps shall automatically start to maintain Plant production rates.

All instrumentation and systems shall be designed to provide safe and reliable operation of each Unit in accordance with all applicable codes and standards.

Main and redundant process transmitter inputs shall be provided for critical control loops. Inputs shall be brought into different I/O modules for integrity.

Current-to-pneumatic (I/P) converters will be used to provide the interface between the electronic control signals and pneumatically actuated control valves. The converters will be responsive to the basic control signals for the system and will have a 3-15 psi output. Feedback from I/P converters mounted on control valves shall be sent to the DCS for control system tuning purposes. Actual Line valve position feedback shall be from position transmitters provided for split range control valve applications only, to provide CRT indication for the operators.



The system shall be designed to require a minimum amount of operator action. The control system shall include all necessary logic to change the operating mode for selector stations safely under various operating conditions.

The system shall be designed to assure transfer from manual to automatic and vice versa with no operator balancing or upset in the individual control loops.

All backup pumps should be able to auto-start from the DCS on primary pump trip, low suction pressure and low discharge pressure, at a minimum.

The Seller shall keep a master set of the Contractor’s and vendor's wiring drawings; CTG control system configuration, cabinet arrangement, and power distribution drawings; instrument index; instrument and control valve data sheets; and P&IDs marked with all as-started up changes. All as-started up changes shall be incorporated into the final drawings, documents, etc., which are to be submitted to the Purchaser upon before turnover of the project.

Plant control system shall be capable of day-ahead programming of key events (i.e. turning over unit to CAISO remote dispatch). The Seller shall be fully responsible for the interface design with the CASIO remote dispatch system.

The plant shall be operable from the control room by a single operator under all normal conditions from minimum to full load. Startups and shutdowns may require an operator in the field.

Automatic steam drain and sky vent valves controllable locally and/or from control room.

8.1. Distributed Control System

A microprocessor-based Distributed Control System (DCS) shall be provided for controlling, monitoring, indication, alarm, and historical functions. CRTs located in the main control room shall serve as the primary operator interface. This system will monitor, alarm, and provide limited control of the combustion turbines. CTGs remote CRTs shall be provided in the main control room for detailed controlling, alarming, and monitoring of the combustion turbines. A MODBUS or Ethernet communication link for data acquisition shall be provided between the turbine controls and the DCS for each combustion turbine. Control functions between the DCS and turbine control systems shall be via hardwired signals.

The DCS and the PLC shall be as manufactured by a reputable DCS and PLC supplier with a proven track record in the power industry (approved by Purchaser).

Any normally operating auxiliary systems during normal startup and shutdown operation of the Plant shall be controlled through the DCS. The DCS shall be capable of allowing control and data to be passed between the ISO and the plant’s AGCT or RIG system.

The microprocessor-based DCS shall be complete with design, engineering, materials, manufacture and assembly, optimization, documentation, testing, and field services.



The DCS shall include automatic control and monitoring of the startup, shutdown and normal operation of the Plant systems through redundant Plant communication loops.

The DCS shall provide automatic and manual control of all major subsystems.

The Facility shall include a master clock system synchronized with satellite (GPS) complete with antenna, accessories, and equipment. This master clock system shall provide time synchronization signals for all control systems for the plant requiring time synchronization.

8.1.1. Performance Requirements

The system shall be properly protected from voltage surges that are normally experienced in a power plant. Inputs, outputs, and other connections shall meet the surge withstand requirements of ANSI C37.90a.

The devices shall have input to output isolation, shielding, separation of circuits, surge suppression and other measures to meet these provisions.

The system shall operate satisfactorily without air-conditioning and with ambient temperatures from 40F to 110F at a relative humidity of 20-95%, non-condensing.

8.1.2. Functional Requirements

Remote I/O and logic cabinets may be used within the Plant. Redundant fiber-optic data highways must be used and must be physically separated from each other and routed in different raceway systems between the remote I/O and logic cabinets and the control room operating consoles. All engineering functions must be able to be performed remotely via an engineering console located in the control room equipment area.

The operating staff at the facility will be kept to a minimum. Therefore, a high level of automation and reliability is required. Each system shall be capable of operating on full automatic. Fail-in-place lock-up features upon loss of air or signal will be provided as appropriate for the application. The DCS shall alarm all abnormal process and operating conditions, system component failures, loss of air on critical control valves, etc., to ensure safe and efficient operation of the Unit. Alarms shall also be provided to meet the requirements of all applicable Fire Protection. The operator shall have the ability to tag out equipment (fans, pumps, valves, dampers, etc.) from the CRTs for work performed by maintenance personnel. When a piece of equipment is tagged out by the operator, the operation of that device by the control system shall be inhibited in the system logic. The graphics displays shall indicate when a device is tagged out.

8.1.3. Console Design

The control system shall be designed to allow Plant operation by a minimum number of operators. All Plant systems shall be operable from the main control room. The console shall consist of but not limited to the following:



Five DCS CRTs

Five keyboards

Sequence of events recording

Combustion turbine control CRT (one per CTG) (with keyboards, printer[s], etc.)

8.1.4. Hardware Requirements

The following paragraphs define the general requirements for the hardware and software for the DCS and other microprocessor based control systems:

8.1.5. DCS Partitioning

The DCS and CTG control systems shall be divided into subsystems. The number of subsystems shall be agreed to by the Purchaser. The logic hardware for each subsystem shall be independent from the other subsystems. Critical safety-related communications between subsystems shall be through hardwired I/O. All other communication shall be by data-highway. Redundant processors shall be provided for each subsystem and its control I/O.

8.1.6. Power

Redundant power feeds shall be provided to the DCS, CTG, and control systems. The primary feed shall be 120 VAC from the plant UPS. The secondary feed shall be from the plant 125 V DC distribution system.

A failure of a power supply shall not affect system operation. Failure of any power supply shall be alarmed on the CRTs on the main control room and Plant maintenance personnel shall be capable of replacing power supplies with the system on-line. Modular power supplies may be provided as a substitute for 100% power supplies provided they are supplied on an N+2 configuration per cabinet. In addition, loss of any battery backup power should be alarmed in the DCS.

8.1.7. System Failure Protection

No single hardware or software failure shall affect normal control of the Plant.

System programs and configurations shall reside in nonvolatile memory. Any volatile memory shall be easily re-installed.

System failures shall be alarmed and logged on a printer.



8.1.8. DCS Communication Network

The Plant's DCS communication network shall consist of a single redundant data-highway loop, to which the DCS shall be connected. DCS shall be connected to the redundant data-highway loops with redundant communication hardware. The communication hardware shall have automatic loop transfer capability to provide protection against a single loop failure. Loss of either data-highway loop shall be alarmed. The data-highway shall permit all devices in each system to interface with one another. No single equipment failure shall interrupt communications between subsystems.

Individual points shall be scanned, system communications completed, and control signal outputs updated at least once every 1/3 second. All data on CRT displays shall be updated at least once every second. CRT graphics displays shall be fully displayed with all current live data within 2 seconds after the request for the display has been initiated.

8.1.9. Printers

The system shall include color graphics-capable quiet printers. Three printers and stands are required. One printer shall be dedicated to alarms. Alarms shall be printed in red. Cleared alarms shall be printed in black. The other printer shall be for logs and graphics displays printing.

8.1.10. Computing Hardware and System I/O

Redundant process equipment (pumps, fans, etc.) shall have its control located on different I/O cards. Process status data from an individual piece of equipment shall be wired to the same input card, except for signals from redundant transmitters, which shall be wired to different input cards.

The meaning of “contact” within the scope of this document shall be an electro-mechanical relay contact, or a solid state switch, such as a triac, transistor, semiconducting rectifier, etc. Contact ratings shall be compatible with the controlled loads.

Each subsystem shall be shipped with a minimum of [10]% spare I/O installed. This I/O shall be wired out to terminals. The loading of all system controllers shall not exceed 60%.

Sufficient spare rack and cabinet space shall be available at shipment to expand the logic capacity and I/O capacity of each subsystem by at least 10% by adding the appropriate modules and equipment.



8.1.11. System Cabinets

Cable entry into system cabinets shall be through the top or bottom. Cable supports shall be provided in each cabinet. Cables shall not block access to any cabinet hardware for equipment inspection, maintenance, or removal and replacement.

A high temperature alarm for each logic cabinet shall be provided and displayed on the console CRTs.

Terminations from the field shall be terminated on vendor's standard termination unit.

Not more than one wire shall be connected to one terminal block point except where jumper wires are necessary, in which case 2 wires may be connected for internal wiring.

Each I/O point including spares shall be provided with vendor’s standard terminals. No more than one wire shall be connected to one terminal, except where jumper wires are necessary.

8.1.12. Electrical Design Criteria

All control devices and components shall be heavy-duty type suitable for operation at 120 VAC or 125 VDC. Insulation of coils shall permit continuous operation at a temperature of 130C.

Contacts for external control circuits shall be heavy-duty type. The contacts shall have an AC interrupting capacity of ten times their normal rating and shall not Appendix excessive arcing or contact bounce.

Relays with exposed contacts shall not be used.

The voltage for contact interrogation is 125 VDC/120 VAC for the DCS and CTG.

All limit switches shall be heavy-duty snap-action types.

The DCS and CTG control system cabinets shall include the following:

Cabinet ground bus: Bus for grounding cabinet, rack, and equipment grounds

Insulated or common ground bus: Bus for grounding instrument and control cable shields

All cabinet ground buses will be grounded to building steel.

Wire markers on both ends of each wire that is longer than 12 inches shall be provided with indelible designations in accordance with the DCS supplier’s wiring diagrams.



8.2. Software Requirements

8.2.1. Data Acquisition

A data acquisition system (DAS) shall be provided as part of the DCS which will include a performance and monitoring package to track the unit and plant performance. The system shall average, weigh average and integrate pressures, temperatures, flows, calculated values, etc., as required for the performance calculations, logs, etc. An OSI-PI system shall also be provided. OSI-PI system shall interface with the independent PI system through the plant DCS. The PI system shall have 200% of the plant DCS I/O count capability with 2-PI process book licenses. The DAS shall, as a minimum, perform the following functions:

Time-stamp and store all data point at user-specified level of accuracy to common database

Redundant hard drive storage of at least 365 days of data

Archive storage on optical or other remotely accessible storage system

Provide for direct transfer of files in MS Windows software.

8.2.1.1 Sequence of Events Recording

The DCS shall provide scanning of not less than 150 digital (contact) inputs for sequential events recording (SER) system. These inputs shall be scanned to discriminate between contact operations which occur a minimum of one millisecond apart and print them in their proper sequence when they are opening and closing. Each event shall be printed on the log printer as an individual event. The complete time shall be parted out in hours, minutes, seconds, and milliseconds with each sequential event contract status change.

The DCS shall include sufficient buffer storage in the data acquisition system memory structure for the SER programs to ensure that the system will not fail to detect a contact operation due to storage or print buffer filling.

The DCS shall include the SER program to permit storage of the sequence of events log in the Historical Storage and Retrieval (HSR) system in addition to printing the information on the log printer. The HSR shall be sized large enough to store all sequence of events logs.

8.2.1.2 Logging

The system shall log pre-selected variables at one hour intervals beginning at 1:00 AM. Values shall be printed at the end of each 24 hour period at midnight on the log printer. The variables shall consist of calculated values, averaged values, integrated values, instantaneous values, weight averaged values, or the maximum value for the time period.



The variables and the exact format of the log shall be agreed to by the Purchaser. Data shall be logged on sheets in column form with data for any given variable tabulated in one vertical column.

The data which is currently being accumulated for the log shall be protected in case of system failure. The log program shall automatically re-initiate the accumulation of data following a system fail over without loss of data.

8.2.1.3 Historical Data Collection, Storage, and Presentation

A historical data collection, storage, and presentation (HCSP) system shall be provided that will fully automate the collection, storage, retrieval and presentation of plant data. The HCSP shall provide a centralized collection of information, a real-time database and a historical data archive. The HCSP shall interface with all of the plant real-time systems (i.e. CTG Control System, BOP DCS, etc.) simultaneously and shall be capable of reading and writing to these systems. The HCSP shall be complete with server, monitor, RAM, hard drive, tape backup, CD ROM drive, etc.

8.2.1.4 Graphics Displays

The graphics displays for use by the operators on the CRTs shall be developed in accordance with the Seller's standard utility format. Graphic displays are subject to approval by Purchaser. The DCS shall include spare capacity of 20% for the number of graphic pages for future additions.

8.2.2. DCS Interfaces

The DCS shall be designed to interface with other Plant systems, specifically the CTG control system, the chemical feed system, gas metering system, power electronics monitoring/control system, and data acquisition system, etc.

Except as noted, packaged systems including the demineralized water treatment will be programmed into the DCS. The continuous emissions monitoring system (CEMS), the gas compressor system controls, and the fire protection system will be stand-alone systems. Where programmable Logic Controllers (PLC) are used, these control systems will be an Allen Bradley 540E or approved equivalent, with a data highway type connection to the DCS.

The DCS will be configured by the DCS supplier with information and coordination provided by the Seller. A consistent control and instrumentation philosophy will apply throughout the plant to minimize diversity of equipment type and equipment manufacturer. Either 48 VDC or 24 VDC will be used for the digital input wetting voltage.



8.2.2.1 Chemical Feed System Control

The facility shall include the primary and secondary process signal inputs (flow, specific conductivity, etc.) between the sampling system and DCS.

The chemical feed systems shall be controlled through the DCS. The DCS shall generate all applicable chemical feed system alarms.

8.2.2.2 CTG Control Interface

The DCS shall be designed to control by feed forward action, with system calibration and final correction provided by feedback action. The control equipment furnished shall include all feed forward devices and other equipment to provide complete stability under all conditions of load changes. Feed forward demands shall be developed for CTG demand, fuel flow, etc. The system shall control the operation of the CTG inlet guide vanes (IGV) through the CTG control system.

The DCS shall be fully interfaced with the CTG control system. Critical control and protection/trip functions shall be hardwired between DCS and CTG control system. The communication interface to the CTG control system shall be provided in accordance with CTG supplier requirements for DAS functions and non-critical control signals. The DCS shall interface to the CTG control system to manage the following analog and digital CTG control functions:

Startup sequencing through synchronization.

Speed and load control.

Temperature control.

Safety control including:

— Automatic safe shutdown (ramp down)

— Selected shutdown (ramp down).

— Emergency shutdown (fuel shutoff).

The Facility shall include sufficient manual control capability for CTG speed, generator voltage, and excitation such that a single operator can control the Plant from the main electrical panel.

Inputs for fuel gas flow to each CTG shall be provided.

8.3. Testing

A standard factory acceptance test of the complete control package including all software, hardware, graphics, and alarming shall be provided.

The FAT shall be performed in the factory, and witnessed by the Purchaser or Purchaser representative, prior to shipment.



8.3.1. Tools

One complete set of all special tools, software, and appurtenances required for maintenance and operation shall be furnished with each system. The Seller shall itemize the special tools and software that shall be furnished. If no special tools and software are required, the Seller shall make a clear statement to this effect before Turnover to the Purchaser. Any such tools required shall become the property of the Purchaser.

8.3.2. Installation and Operating Instructions

One preliminary set of installation, operating, and maintenance instructions shall be available for use by Purchaser during the factory simulation test.

System logic diagrams, configuration drawings, and schematics shall be bound in a separate volume of the instruction manual, and shipped within two months of system shipment. Drawings shall be 11" x 17."

The installation and operating instruction books shall be complete to provide necessary details for the installation, operation, and maintenance of all control systems and equipment furnished for the Plant. Refer to section on Documentation for the detailed requirements for the Instruction Books and Operating Manuals.

8.4. Continuous Emissions Monitoring System

The Facility shall include a Continuous Emissions Monitoring System (CEMS) for the Plant subject to Purchaser’s approval. A CEMS shall consist of continuous duty, remote type analyzer subsystem with an extractive probe sampling system for each of the generating units and a common data acquisition system. A maximum of two analyzer subsystems may be installed in one CEMS shelter. 100% redundancy on CEMS sample and monitoring equipment shall be provided.

The CEMS shall be complete in all respects while meeting the requirements of this section. The Seller shall develop the EPA and any local monitoring plans, which shall be subject to Purchaser’s review.

The system shall be designed to comply with the Quality Assurance Procedures of 40 CFR Part 75, Appendix B. In addition, the system shall be designed to comply with all applicable EPA installation, performance, testing, quality assurance procedures, and requirements set for the in 40 CFR Part 60, as well as all applicable requirements of state and federal air quality permits.

The CEM system shall be a complete and tested system ready for reliable commercial operation. Failure of any system component or control shall be alarmed at the data logger in the control room.



8.4.1. Analyzer Subsystem

Each generating unit's analyzer subsystem shall consist of one sample transport system and one set of continuous emissions monitors for the following flue gas constituents. The Facility shall include all analyzers required as per permits and EPA requirements which include:

Nitrogen oxides (NOX) – dual range (low and high level)

Oxygen (O2)

Other as required

The system shall be sized and constructed to provide a transit time from the stack probe to the analyzer no greater than 6 minutes.

All of the analyzers, data logger, and manual control switches for each unit shall be housed in a single standard 19-inch rack. Rack space shall not be shared between generating unit systems. The space for pumps, filters, chillers, etc. maybe shared between unit systems, but each item must be clearly identified by unit.

The CEMS shall be complete with analyzers, data logging, calibration gases, etc. At Turnover the Seller shall furnish a 6-month supply of certified gases in rechargeable cylinders for each flue gas constituent to be monitored. These gases shall include zero cal, span cal, low linearity check, and mid range linearity check. Each gas cylinder shall be supplied with an appropriate two-stage regulator and shall be connected to the sample transport system. All tubing on the exterior of the CEMS building shall be 316 stainless steel tubing or tubing with a stainless steel jacket. These cylinders shall become the property of the Purchaser and remain on the Plant site.

8.4.2. Sample Transport System

Separate sample transport systems shall be provided for each generating unit that would have emissions. A separate umbilical bundle shall be provided for each unit. This umbilical bundle shall be self-limiting heat traced, and contain all cable and tubing required to connect the stack probe to the CEMS. Each umbilical shall be long enough to reach from the probe to the termination point in the CEMS shelter without splicing.

The heat tracing for each umbilical bundle shall be the temperature-controlled type and shall be an integral part of the umbilical. A temperature controller shall be provided inside the CEMS shelter for this heat tracing.

Sample probes shall have a sufficient length to meet EPA requirements and to obtain a representative sample. Heated probes and the necessary provisions to prevent failure due to moisture or other flue gas constituent shall be supplied. If required by the equipment manufacturer, automatic probe cleaning shall be furnished. Automatic probe cleaning shall be controlled through the CEMS data logger.



8.4.3. Stack Gas Monitoring Equipment

Stack gas analyzers shall have a proven track record in meeting EPA requirements on multiple units and will be subject to Purchaser’s approval.

8.4.4. CEMS Data Logger

CEMS shall include all hardware, software, and configuration needed to provide a system that meets all requirements of 40 CFR Part 75.

8.4.4.1 CEMS Enclosure

The Facility shall include sample conditioning system, analyzers, power supply system, and lighting in a CEMS enclosure/shelter. The enclosure/shelter shall be sturdy and suitable for power plant application. The enclosure/shelter shall be walk-in, dust tight, weather tight built is accordance with the local building codes requirements.

The CEMS enclosure/shelter shall have one HVAC system as defined in the Mechanical HVAC section.

The analyzers and data-loggers shall be connected to the plant UPS.

A maintenance switch shall be provided to allow manual calibrations. The maintenance switch shall provide a signal to the Data Logger as being in ‘Maintenance Mode’. Only when the maintenance switch is active shall the manual calibration valves and switches be energized.

8.4.5. Documentation

Installation, operating, and maintenance instructions shall be provided by the Seller for each item in the CEMS system and building. These instructions shall be provided both in hardcopy and on a CD-ROM. Hardcopy manuals may be scanned into Adobe Acrobat 3.0 or later and then included on the CD-ROM.

8.4.6. Shipping

The complete CEMS shall be shipped to the site assembled with all the CEMS apparatus, analyzer subsystem, sample transport system, and interior shelter features mounted in place.

8.4.7. Factory Checkout

The Seller shall check the CEMS at the factory before it is shipped to site to ensure that the CEMS meet all EPA requirements before shipment



8.5. Data Acquisition System

The Seller shall provide a complete data acquisition system (DAS) with software and hardware. The DAS, which shall fully comply with all applicable requirements of 40, CFR Part 75 shall be located in the Plant’s main control room. It shall be capable of interfacing with the data logger on that Plant site. The system shall collect, store, calculate, edit, display, and print out data, and other information as set forth in the requirements that follow.

The polling computer shall include the following items at a minimum:

A current Pentium or equivalent processor, with a minimum 512 MB RAM, 32X CD ROM, 4 mm tape backup, 80-GB hard drive CD RW drive, 8MB AGP video, Ethernet card and 56K modem.

21-inch video display terminal, high-resolution color monitor (VGA or superior - 1600 x 1200 at 75 Hz-26mm dot pitch).

Report printer

All interconnecting cables.

Full duplex Ethernet connectivity/capability for Plant LAN connection.

The computer, CRT, printer and other equipment shall be mounted on a workstation/desk with an accompanying printer stand. This workstation shall be in its own space in the Plant control room.

8.5.1. Software

The system program shall provide the following features:

Multi-task operation such that data can be collected in background mode allowing report generating or data editing in foreground mode.

Printer failure shall not cause the program to stop. All printer output is to be stored, so that when the printer is ready, the system will print in sequence all reports generated during the time the printer was unavailable.

Auto-restart. Should a system failure occur, it would automatically restart itself when the failure is cleared. This feature eliminates the need for any manual reloading of the system program.

Editing of all data on reports such that the revised data will be included in any requested report, unless otherwise specified.

Internal clock/calendar with automatic leap year and operator-controllable daylight savings time adjustments.

Keylock feature to limit access to program parameters using multi-level passwords.

One level for operators to call up reports

One level for engineers to edit report

One level for technicians for diagnostics, etc.



The system shall have the ability to download data in ASCII format.

Capability of expanding if other emission monitoring points or types is added.

The program backup shall be supplied on a CDROM for reloading should the system fail. The actual source code should be supplied in hard copy format.

The system shall include the software with standard REASONS CODES

Video display terminal, to provide

— Real-time view of all measured and calculated parameters

— Combustion turbine and monitor status

— Visual alarm indication of potential emission standard violations, excessive monitor calibration drift, or monitoring system failure

— Graphics & trending

Data shall be transferred to the non-volatile memory or C Hard Drive hourly and then transferred to the D hard drive daily.

Software to support remote interrogation by modem

Users Manual based on Purchaser specific software

Calculations, record keeping, reporting, bias adjustment, automatic data substitution procedures, and other requirements set forth in 40 CFR Part 75.

8.5.2. Data Communications System

Fiber optic cable shall be used between the polling computer and each data logger. This cable shall be installed in its own conduit.

The Seller shall provide all fiber optic modems and telephone connections required for the system to interface with state/federal reporting agency.

8.5.3. Reporting and Recordkeeping Requirements

The data acquisition system shall automatically compute and cause to have printed all information required pursuant applicable 40 CFR Part 60 Subparts and Appendices, 40 CFR Part 75; and all applicable EPA regulations, Purchaser's EPA permits, and Purchaser’s local permits.

8.5.4. Quality Assurance and Quality Control Data

The data acquisition system shall be required to record and maintain data pertaining to daily and periodic monitor calibrations and checks and all other monitoring data quality assurance and quality control procedures. The records generated and maintained shall be sufficient to satisfy all applicable quality assurance and quality control provisions of 40 CFR Part 75 and 40 CFR Part 60.



Data will be recorded on a daily basis for each gaseous pollutant, dilutent, and flow monitor, as applicable.

Periodic testing and certification procedures are required to assure monitoring data quality. The data to be recorded on a periodic basis for each gaseous pollutant, dilutent, and flow monitor, as applicable, shall meet all applicable requirements of 40 CFR Part 75 and 40 CFR Part 60.

At Requested Intervals (Quarterly Reports) Based on Edited and Unedited Data.

The data acquisition system shall be capable of compiling and generating quarterly reports pursuant to the requirements of 40 CFR Part 75, and 40 CFR Part 60, as applicable, and of any applicable State regulations, and as required by Purchaser's air quality permits. The data acquisition system shall be capable of producing these reports in printed and electronic format suitable for submission per the Plant reporting requirements. The reports shall meet all EPA reporting requirements.

The data acquisition system shall compute and cause to be printed, when requested. The data processor shall be designed to store sufficient data to produce these reports. Power supply failure shall not erase the stored data or the program.

8.6. Balance-Of-Plant Instrumentation Installation Criteria And Installation Details

8.6.1. Scope of Specification

The following criteria cover the general requirements for the installation of instrumentation and control systems.

The scope of work covered by this specification includes, but is not limited to installation and support of field instruments, instrument impulse lines, pneumatic signal lines, sample lines, and local instrument cabinets.

Eyewash stations and showers use shall be alarmed in the DCS.

No primary sensor full-scale signal level, other than thermocouples, will be less than 10 mV or greater than 125 V.

To the extent practical, instrumentation will be standardized.

Instrument analog signals for electronic instrument systems shall be 4 to 20 ma dc. Instrument analog signals for pneumatic instrument systems shall be 3 to 15 psig.

Use of pneumatic controls will be limited to applications where sub-supplier standard designs can’t be provided without them.

Local indicating controllers (If required) shall be furnished with an auto-manual function switch.



The following units of measurement shall be used in the process measurement and control. English units are preferred, but metric units may be used when in common practice:

Parameter Units of Measurement

Temperature degrees Fahrenheit (o F)

Pressure pounds per square inch gauge (psig)

inches of water column (in wc) or (inH2O)

pounds per square inch absolute (psia)

inches of mercury absolute (HgA)

Level

General percent

Tank Gauge linear feet, inches, and tenths of inches

Deviation from normal level

Flow

Liquids gallons per minute (gpm)

pounds per hour (pph or #/hr)

Gases and Vapors standard cubic feet per minute at 60 OF (SCFM)

standard cubic feet per hour at 60 OF (SCFH)

Solids pounds per hour (pph or #/hr)

tons per day (tpd)

Steam & Water Sampling

pH pH (pH Units)

Specific conductivity S/cm

Cation conductivity S/cm

Degassed cation conductivity S/cm

Dissolved oxygen parts per billion (ppb)

Permanently attached stainless steel tags shall be purchased with all major instrument equipment. Each tag shall carry the item tag number. This tag is in addition to the manufacturer's model number and other data nameplate.

Thermocouple and test wells shall have the material of construction stamped on the well. If tag numbers are assigned to these wells, the number shall also be stamped on the well.



Instruments in vapor or gas service shall generally be mounted above the sensing point. Instruments in liquid, steam, or condensable vapor service shall generally be mounted below the sensing point. If accessibility, visibility, or clearance requirements preclude either of these situations, provisions will be made in the instrument piping configuration to ensure proper operation of the instrument. Close coupled line mounted pressure and temperature gauges are mounted above the sensing point and are excluded from the aforementioned.

Instrument root valves at piping or equipment connections shall be accessible from grade, platform, stairway, or permanent ladder. Indicating instruments that must be visible for automatic control adjustment or manual operation shall be visible from the adjustment or operating point. If plot or piping arrangement precludes this, other provisions shall be made for indication at the adjustment or operating point. Indicating instruments not in the above category shall be visible from operating aisles or passageways.

Instruments shall be located so that required clearances are maintained for walkways, accessways, and operation and maintenance of valves and equipment.

Blind transmitting instruments shall generally be line mounted as near the sensing point as practical. Instruments shall not be line mounted when temperature or vibration from hydraulics or operating equipment will affect the operation of the instruments or cause damage to instrument piping.

Local recording and/or control instruments, except displacer-type level controllers and flanged mounted transmitters, shall generally be remote mounted at grade or outside platform handrails.

When practical, remote mounted instruments will be grouped and have common supports.

Instrument piping shall generally be routed through pipeways and areas provided for the routing of plant piping, and shall be such as to protect the piping from damage during plant operation and maintenance. Routing of instrument piping will be controlled by the Field Control Systems Supervisor or Engineer.

Instrument piping shall be supported from pipe supports, pipe, and any other permanent structure, except as follows:

Instrument piping shall not be supported from uninsulated hot (125° F and above) or cold (40° F and below) pipes.

Instrument piping supports shall not be welded to stress relieved equipment or internally lined equipment. Instrument piping supports shall be sufficient to maintain the piping in a neat manner. Instrument process piping having horizontal runs greater than 5'-0" or combined horizontal and vertical runs greater than 10’-0" shall be supported. The maximum length of unsupported tubing at a bend shall be 4'-0".

Process connection size shall be a minimum of 1/2-inch NPT. See Section 2.25.8.8.



All instruments and instrument process lines subject to freezing shall be heat traced, filled with seal fluid and purged or otherwise protected from freezing. Preference will be given to heat traced sensing lines and heated enclosures. The instruments and process lines shall be identified on the P&ID’s.

8.6.2. Instrumentation Electrical Requirements

Enclosures for electrical instruments shall comply with requirements of the Electrical Area Classification in which they are installed. In the event that the manufacturer of certain instruments cannot provide enclosures suitable for the area, purging of the enclosure with inert, dry air or gas shall be given consideration. Cases for locally mounted instruments and devices shall be weatherproof as a minimum.

Terminals for electrical interconnections including thermocouple wire shall be clearly identified to indicate polarity, electrical ground where applicable, and test connection. Terminals for purchased items shall normally be identified in accordance with manufacturer’s standard marking.

Electrical conduit connections for locally mounted instruments shall normally be internally threaded, where available as manufacturer’s standard option. Connections shall be suitable for the Electrical Area Classification in which the instrument is installed.

8.6.3. Pressure Instruments

Pressure gauge case sizes shall be 4-1/2”.

Connections shall normally be 1/2" MNPT for 4-1/2" locally mounted gauges. Receiver gauges and 1-1/2 to 2-1/2" gauges shall be 1/4" NPT.

Wherever necessary for Facility operation, either industrial-type, 4-1/2 inch diameter pressure gauges with white face and black scale markings or indicating pressure transmitters will be provided.

Dials shall be white, non-rusting metal or plastic with black figures. Manufacturer’s standard dial faces shall be provided. Dials or pointers shall be field adjustable for zero alignment. These requirements do not apply to 1-1/2 inch and 2-inch gauges.

Steam pressure sensing transmitters or gauges mounted above the steam line will be protected by a loop seal or a siphon. Siphons will be installed on pressure gauges in steam service as required by the system design.

Pressure gauges on process piping will generally be visible 10 feet from an operator's normal stance at floor level and will be resistant to Facility atmospheres.

Pressure gauge accuracy will be ±0.5% of full range per ANSI Specification B40.1, Grade 2A.

Pressure devices on pulsating services will be equipped with pulsation dampers.



Pressure devices subject to shock during equipment starts, stops or transient conditions will be installed on an isolated gauge panel.

In general, pressure instruments will have linear scales with units in psig.

Fire protection system pressure gauges will be designed in accordance with Underwriters Laboratories (UL) standards.

Pressure test points will be equipped with isolation valve and cap or plug.

Pressure gauges will be provided with either a blow-out disk or a blow-out back.

Pressure gauges will have acrylic or shatterproof glass faces.

Differential Pressure Instruments shall normally be of the manometer type, either liquid-filled, bellows, or force-balance type according to requirements.

Pressure Gauge Elements in contact with process fluid shall normally be 316 stainless steel, except where the process requires a special material. Elements above 1,000 psig shall be bored instead of drawn with threaded and backwelded connection to the socket and tip. Bronze elements shall normally be used for air service.

Sockets and Tips shall be stainless steel for stainless steel bourdon tubes, and brass for bronze bourdon tubes, in accordance with manufacturer's standards.

Overpressure Protection shall be 1.3 times the maximum tube rating to prevent permanent set or loss of calibration from continuous overpressures. For services of 0 to 60 psi and below, wide bourdon tubes shall be furnished with external gauge protectors. Gauges shall be vacuum protected.

Range shall be so specified that the gauges normally operate in the middle third of the scale. Gauges on pump discharges shall be specified for over-range protection beyond the pump shut-in pressure or relief valve setting. Gauges on vessels shall be specified for overrange protection not less than 1.2 times the vessel design pressure.

Cases for gauges in the process area and in process service shall be solid front, phenolic with a screwed ring, or plastic turret type with a snap ring. Cases shall be weatherproof, and metal cases shall be protected with weather-resistant black paint.

Weep holes shall be provided on the case bottom of all gauges located in humid areas unless the case already has sufficient ventilation.

Diaphragm Protectors shall be used where necessary to protect gauges from corrosive fluids. They shall have 1/2-inch NPT screwed or flanged connections in accordance with piping specifications.



8.6.4. Temperature Instruments

Temperature elements and dial thermometers will be protected by thermowells except when measuring gas or air temperatures at atmospheric pressure. Temperature test points will be equipped with thermowells fitted with caps or plugs.

Dial thermometers will have 5 inch diameter (minimum) dials and white faces with black scale markings and will be every-angle type and bimetal actuated. Dial thermometers will generally be visible 10 feet from an operator's normal stance at floor level (viewing area) and will be resistant to Facility atmospheres.

If a thermocouple is inaccessible, the leads will be brought to an accessible junction box.

Thermocouples (if used) will be dual-element, ungrounded, spring-loaded, Chromel-Constantan (ANSI Type E) or Chromel-Alumel (ANSI Type K) for general service.

Thermocouples general application shall normally be magnesium-oxide insulated sheathed type. Thermocouple shall be constructed with a 316SS sheath of 1/4-inch diameter.

Thermoelectric Properties, temperature limits, and limits of error of thermocouples and thermocouple extension wires shall conform to ANSI Standard MC 96.1.

Identification of thermocouples shall be by a wired-on metal tag indicating the code or tag number.

Thermocouple heads will be the cast aluminum type with an internal grounding screw. Conduit connection shall be ¾ inch. Connection to the thermocouple assembly shall be ½ inch NPT.

In general, temperature instruments will have scales with temperature units in degrees Fahrenheit. Exceptions to this are electrical machinery resistance temperature detectors (RTD’s) and transformer winding temperatures, which are in degrees Celsius.

RTD’s will be either 100 ohm platinum type or 10 ohm, copper, three-wire circuits (R100/R0-1.385), and ungrounded. The element will be spring loaded, mounted in a thermowell, and connected to a cast aluminum head assembly.

Where ASME Performance Test Codes are applicable to power cycle piping, they will be used as the criteria for determining well lengths.

Thermal filled system Instruments shall be gas or liquid filled stainless steel capillary type.

Material shall be a minimum of ANSI Type 304 stainless steel machined from bar stock in a tapered configuration. Other materials may be specified as required by the piping specifications. The alloy used shall meet the process metallurgical requirements.

The temperature process connections shall be 1 inch NPT where screwed connections are allowed by the piping classification. Where flanged connections are required by the



piping classification, they will be designed to mate against a 1-1/2-inch raised face or ring joint flange in accordance with the piping specifications. Weld in thermowells shall be at least 1 inch diameter.

Special protecting tubes for high temperature applications of chrome iron, incoloy, or other special materials shall be used as required by the temperature and the process materials.

Thermowells in combining streams shall be a minimum of 10 pipe diameters downstream of the junction for liquid services and 30 pipe diameters for vapor services.

Brass plug and chain shall be provided with all test wells.

Thermowells shall be designed to avoid root stress failure due to vibrations induced by wake vortices. Where the standard thermowell is designed to withstand the maximum fluid velocity permitted in the piping design standards, individual wake frequency calculators are not required.

Dials of 3-inch diameter may be used in mechanical equipment lube and seal oil service or other auxiliary service.

Installation of thermocouples, thermowells, test wells, and thermometers shall be in accordance with Utility and good engineering practice unless otherwise specified.

8.6.5. Level Instruments

Reflex-glass, liquid-free, or magnetic level gauges (Penberthy or equal) will be used. Sump pump motors will be controlled by displacer or float-type level switches supplied by the sump pump manufacturer.

Level transmitters for measuring the level in storage tanks vented to atmosphere (e.g., makeup water storage tank, demineralized water storage tank) will generally be the flanged mounted differential pressure type flush diaphragm and will be equipped with local indication as well as central control room indication.

Differential Pressure type level instruments will normally be used for all services except for vacuum services. When differential pressure type instruments are to be mounted at or below the taps, they shall be furnished with zero elevation or suppression adjustment.

External displacement type instruments shall normally conform to the following:

Material shall normally be fabricated carbon steel, with stainless steel displacer and Inconel torque tube. Where vessels are of alloy construction, body material shall be equivalent or better.

Air Fins or heat insulators shall be used at operating temperatures above 400°F and below 0°F for displacers with pneumatic pilots. Where displacers with electronic transmitters are used, they shall have air fins or heat insulators above 250°F and below 0°F.



Connections shall normally be 1-1/2-inch flanged with bottom-side and top-side connections. Flange ratings shall be in accordance with vessel trim specification.

Rotatable Heads shall normally be specified.

Transmitter Output shall be 4 to 20 ma dc.

Direct operated type level controls (e.g. ball float, mechanically linked valve), shall be used on utility service only.

Special level problems will arise periodically and will require special level measuring devices such as internal displacers or floats, bubblers, and electronic types (capacitance, ultrasonic, nuclear, conductive, or electrical resistance).

8.6.5.1 Liquid Level Columns (Bridles)

Liquid level bridles shall be used to minimize the number of vessel nozzles where numerous level instrument connections are made to the same vessel

The bridle upper connection shall be flooded with process fluid for interface measurements

The top and bottom connections of the bridle shall be made directly to separate nozzles that are not connected to vessel inlet or outlet nozzles.

The bottom connection of the level bridle shall be located a minimum of 2 inches higher than the top of the vessel outlet when vessel discharges from the bottom.

Level bridle piping shall not have bends that will trap dirt or water.

8.6.5.2 Storage Tank Instruments

Tape gauges shall be provided.

Water tanks shall be equipped with flange mounted level transmitters with local indication

Fuel tanks will be equipped with flange mounted smart transmitters and a servo controlled displacer gauge or approved equal.

Tanks containing fuel and hazardous material shall instrumentation that can be tested without draining of contents.

8.6.6. Level Gauges

Typically magnetic follower type level gauges will be provided. Supplier skids will use the supplier’s standard devices where suitable for heavy industrial use. Where glass gauges are provided by skid suppliers, gauge and ball checks will be provided.



All vessels other than storage tanks, where actual level or interface level is measured for indication or control, shall have a level gauge.

Alloy construction (normally 304 stainless steel) shall be used for all wetted parts where the application requires it, and on applications below 20°F.

Frost protection shall be provided where operating temperatures are below 32°F.

Visibility shall cover the operating range of the level instrument(s). In alarm and shutdown service, the visibility shall normally cover the range of all level instruments including the shutdown point. Level glasses shall be visible from grade, platform, or the related instrument.

Connections of gauge glasses shall normally be 1/2-inch or 3/4-inch NPT female top and bottom. Other connection orientations may be used where required.

Level glass cocks where necessary shall meet vessel trim specifications and shall be considered a combination block valve and safety shut-off cock. They shall have a 3/4-inch solid shank NPT male inlet with 1/2-inch or 3/4-inch NPT female spherical union gauge connection. A ball check shall be furnished.

Where standard gauge valves do not comply with the applicable piping standard, gate valves and ball check valves shall be substituted. The gate and check valves shall be installed in the horizontal line to the vessel, with tees provided for vents and drains.

8.6.7. Flow Elements – Flow Nozzles and Venturis

Venturi nozzles shall also be used for all flows used for primary control. Orifice plates may be used for other flow measurements.

Flow transmitters will be the differential pressure type with the range matching (as closely as practical) the primary element.

Linear scales and charts will be used for flow indication and recording.

Critical steam and natural gas flow meters (if applicable) will be temperature and/or pressure compensated, and air flow measurements will be temperature compensated.

Differential pressure type instruments shall normally be used for flow measurements where suitable for the application.

Flow transmitters shall be the essentially zero volume displacement differential pressure type. Bodies shall normally be carbon steel with stainless steel internal trim, unless other materials are required for the particular services. Overrange protection equal to the body rating shall be provided.

Wherever possible, the maximum differential range in inches of water shall not exceed the static absolute pressure in psia in a compressible fluid application. Span shall be continuously adjustable over at least a 5:1 ratio.



Variable area flow meters may be used for small flow rates where local indication is required. They may also be used where rangeability, nonlinearity, viscosity, or the hazardous nature of the fluid makes the differential pressure-type instrument unsatisfactory. They shall normally be the armored type with magnetic pick-up, except for water and air below 200 psig and 1-inch-or-smaller lines where glass tubes may be used. All glass tube area meters shall have front and rear plastic guard plates.

Positive displacement meters shall be used to measure those flows where a highly accurate integrated flowing quantity is desired.

8.6.8. Flow Elements – Orifice Plates

Orifice plates of the square edged concentric type shall be specified except where unsatisfactory for the application. Plate dimensions shall conform to ASME MFC-3M. Weep holes shall be provided in steam and gas flow installations where there is possible condensation or in liquid flow where there is possible gas entrainment. Materials shall normally be Type 304 stainless steel unless special materials are required for the service.

For gas and vapor service, the differential pressure range in inches of water normally shall not exceed the static absolute pressure in psia.

Orifice bores will be calculated using ASME MFC-3M and ISO 5167.

Flange taps shall normally be used in accordance with ASME MFC-3M. For special alloys and 14-inch-and-larger pipe sizes, in 150 psi classification, throat taps may be used. One-half-inch NPT is the normal tap size for 300 psi through 600 psi flange rating. Three-quarter-inch is the tap size for 900 psi through 2,500 psi flange rating. Where threaded connections are not permitted by the pipe class, socket weld connections shall be used.

The minimum orifice flange rating shall be 300 psi ANSI except for lines 14 inches and larger, where 150 psi ANSI is the minimum. The use of higher rated flanges, or of facing other than raised face, shall be as called for in piping specifications.

Ring type plate holders shall be manufacturer's standard plate mounting. Ring facing shall be oval ANSI standard unless otherwise required by piping specifications.

Orifice taps for horizontal pipe runs shall normally be oriented horizontal for clean liquids and steam, and vertical-up for gases.

Venturi tubes, low loss tubes, and flow nozzles shall be used where high-pressure recovery is necessary and/or where only low inlet pressure is available.

Averaging pitot tubes shall be used where the pipe diameter is too large for acceptable orifice plate design in applications such as pump minimum flow bypass control, or where normal straight pipe requirements are not met. The element may have two pipe diameters of straight pipe upstream and downstream mounted in a plane parallel to the maximum disturbance.



Other types of flow elements should be considered where their use is desirable and the above-mentioned elements are not applicable.

Integral orifice meters (combination primary element-measuring device) shall normally be used for meter runs of less than 1-1/2 inches with a suitable strainer upstream of the meter.

Eccentric type orifice plates shall be used for fluids containing two phases. The eccentric type orifice plates shall have the bottom of the orifice bore flush with the bottom ID of the pipe. Eccentric orifice plates shall be used only in horizontal runs.

8.6.9. Annunciators, Alarm Switches, and Electrical Devices

Annunciator design shall be in general accordance with ISA RP-18.1 "Specifications and Guides for the Use of General Purpose Annunciators".

Switches and shutdown for alarms and interlock systems shall be used for on-off applications only. When outdoor installations are required, they shall meet the area classification and be weatherproof. Switches in equipment shutdown service, where practical, shall be directly connected to the process. Wiring for switches shall be two conductors and shall not use the common wire technique.

Switch contacts shall be specified as two single-pole double-throws (Form C) wherever the double mechanism does not induce unacceptable dead band. However, only one function per enclosure shall be specified (i.e., alarm only, or interlock only). On shutdown circuits, the second contact on the enclosure may be used for alarm, but proper signal separation shall be maintained in the conduit system.

Switch action for alarms, shutdowns, and interlocks shall normally be closed circuit at normal operating conditions; open circuit for abnormal condition.

Level switches shall normally be the external float cage type with 1 -inch NPT socket weld or screwed connections. Body material and rating shall conform to piping specifications. Internal trim shall be stainless steel unless other materials are required for the service. Level switches in alarm services may be receiver switches when there is a level transmitter as part of the system.

Pressure switches for direct connected process and utility service shall normally be diaphragm or bourdon tube type with materials suitable for the service. They shall meet the required electrical classification and shall have micro switches. Connection sizes shall normally be 1/2 inch NPT.

Temperature switches, locally mounted in Division 1 or 2 locations, shall be filled system bulb type or expansion type. They shall meet the electrical classification and shall have micro switches. Separable sockets shall be furnished. Temperature switches mounted in the central control room or on a local panel shall normally be thermocouple actuated with cold-junction compensation and be completely adjustable.



Flow switches for direct operation by process fluids may be of the sight flow, rotameter, or paddle type for low accuracy requirements. Orifice plate and differential pressure type shall be used for high accuracy requirements.

Solenoid valves shall normally be used as pilots to actuate other instruments directly connected to process fluids. Valve Bodies for solenoid valves shall follow the piping specifications when used in process lines. Manufacturer's standard brass shall normally be used on air service.

When outdoor installations are required, they shall meet the area classification and shall be weatherproof. Preferred voltage rating is 120 Vac. Coils for solenoid valves shall be hi-temp molded and encapsulated and specified for continuous duty at rated voltage and frequency. Coils for direct current shall be supplied with internal spike suppressors.

8.6.10. Process Analyzers and Analyzer Systems

All analyzers are to be completely piped, interconnected, and checked out for proper functional operating condition.

Complex process stream analyzer systems shall be installed in a waterproof cabinet, enclosed house, or shelter. These shall include the following provisions:

Enough working space shall be allowed for proper maintenance of the analyzers within the house.

Analyzer houses and cabinets shall be of metal or fiberglass construction and equipped with a door, lock, and key.

These enclosures shall be located as close to the process sample points as practical. More than one analyzer measuring and sample system may be installed in a single enclosure if the sample line length is within the analyzer manufacturer's specifications.

All necessary calibration and operating gases shall be provided including gas cylinders and regulators. CEMS equipment shall be according to manufacturer’s recommendations.

Analyzers requiring gases for continuous operation are to be provided with dual facilities for uninterrupted service.

Calibration standards and facilities are to be supplied for zero and span check where specified.

Protected outdoor storage racks adjacent to the analyzer houses shall be provided for the carrier and calibration gas cylinders (including inventory) and their associated regulators. Process sample regulators shall also be located on the outside of the analyzer houses.

The sample systems are to be designed to deliver clean, representative samples to the analyzers at the proper temperatures, pressures, physical conditions, and flow rates.



All wetted components are to be 316 stainless steel, or equivalent, unless other materials are required to minimize contamination and corrosion. Main line class pipe may be used in high temperature samples.

Appropriate measures are to be taken to prevent plugging of sample lines due to freezing, condensation, or solids.

Where sample recovery systems are required, provision for drains shall be made in the building design.

Transportation time from sample point to analyzer is to be less than 2 minutes for chromatographs and less than 1 minute for other analyzer types. Fast circulating loops and/or bypass lines are to be used to achieve fast response times except where such a design would cause EPRI guidelines to be violated or sample composition to be changed.

For gas samples, the pressure should be reduced at the sampling point to increase the velocity through the sample system and reduce time lag. Except in CEMS equipment where the manufacturer’s recommendations are to be followed.

All sample and bypass lines are to have flow indicators, such as rotameters.

Bypass flows and discarded samples are to be routed to chemical safe drains or vented safely to atmosphere.

Adequate facilities are to be provided to protect against unwanted backflow, overpressure, or other abnormal conditions.

When sample conditioning components require heating, they are to be located inside a heated and insulated cabinet or enclosure.

The analyzer and sample system shall be vendor assembled and pretested in the vendor's shop before shipment unless otherwise specified.

Electrical wiring of analyzers shall conform to the National Electrical Code and applicable local codes. For large instruments such as analyzers that cannot be mounted in an explosion-proof box, air purging may be required. ISA RP-12.4 should be followed. If possible, the analyzer houses should be mounted in nonhazardous areas.

Process control loops that include an analyzer shall normally be cascaded. In some cases where the analyzer output is continuous and not delayed, direct control may be provided.

Holding circuits shall be provided when the analyzer output is intermittent. The output of this device may be used for trend recording in addition to providing a signal for a control loop.

Converters to provide a current or pneumatic output shall be provided if required.

CTG non-control instrumentation shall be available through the DCS, if possible. Such information will include:

Bearing metal thermocouples

Bearing drain thermocouples

Generator RTD's



Non-contacting vibration probes

8.6.11. Pressure and Temperature Switches

Field-mounted pressure and temperature switches will be provided in either NEMA Type 4 housings or housings suitable for the environment.

In general, switches will be applied such that the actuation point is within the center one-third of the instrument range.

8.7. Instrument Air and Service Air Systems

Branch headers will be provided with a shutoff valve located at the takeoff from the main header. The branch headers will be sized for the air usage of the instruments served, but will be no smaller than 3/8 inch. Each instrument air user will have a shutoff valve and filter located at the instrument. Each service air user will have a shut-off valve.

Instrument air of suitable quality will be provided for calibration of CEMS oxygen analyzers.

A minimum of 10 service air connections shall be provided around the facility – locations shall be coordinated with the Purchaser.

8.8. Field-Mounted Instruments

Where practical, field-mounted instruments will be grouped together. They will be mounted in areas accessible for maintenance and relatively free of vibration and will not block walkways or prevent maintenance of other equipment.

Field-mounted instruments will be of a design suitable for the area in which they are lo-cated. Freeze protection will be provided as required.

Individual instrument supports will be prefabricated, off-the-shelf, 2-inch pipe stand type.

Individual field instrument sensing lines will be run in horizontal and vertical lengths that do not affect signal response.

In general, local control loops will use a locally mounted indicating controller (pressure, temperature, and flow).

In general, liquid level controllers will be the indicating, displacement type with external cages.

Instrument racks and individual supports will be mounted to concrete floors, to platforms, or on support steel in locations not subject to excessive vibration.



8.8.1. Instrumentation - General Design

All instruments and equipment shall be installed in a manner which assures reasonable protection against mechanical damage, wetting, or extremes of heat or cold. Instrumentation shall be handled at all times so as to protect it from damage to the internal mechanisms. Instrumentation shall be stored in accordance with the manufacturer’s recommendations until installation. Final locations and orientations must be selected for accessibility, repair, and calibration in place, easy access to the rear of the instruments (if needed), and for disconnection without resorting to cutting, burning, or welding.

Instrument supports shall not be mounted on or connected to handrails, stairways, machinery, or to any equipment subject to movement under load.

All pipe-mounted temperature and pressure indicators and bridle-mounted level gauges shall be mounted so as to provide direct visual readings from operating decks and accessibility for maintenance. If pipe-mounted instruments are subject to freezing, they shall be appropriately freeze protected.

Electronic process transmitters shall be 2-wire, smart type.

Temperature, pressure, and differential pressure transmitters, switches, and transducers shall be mounted on either stands, racks, or in local instrument cabinets as long as instruments are properly protected including environmentally protection (heat traced). Instruments which can be logically grouped shall be installed on racks or in local instrument cabinets. Instrumentation, accessories, and all other equipment shall be located and mounted such that calibration, maintenance, and removal work can be performed on any one piece of equipment without disturbing another. Adequate clearance shall be provided so that calibration, adjustments, and connections are easily accessible without need of instrument removal. All instrument covers shall be provided with adequate clearance space for removal. Equipment shall be arranged such that work can be performed easily, without need for special tools.

Instruments and manifold valves shall be easily accessible for calibration. All pressure and differential pressure transmitters shall be installed with instrument manifolds. All differential transmitters shall be installed with three valve or five valve manifolds. Two valve manifolds shall be used for all static pressure transmitters.

Orifice flanges and flow nozzles or venturies shall be oriented such that taps are horizontal, neither above nor below the centerline of the pipe. Flow orifice plates shall be installed only after applicable piping has been flushed or blown down.

Each pressure connection, except for relief valves, shall have a root valve. Double block and bleed valves are required for relief valves that would require an entire plant outage to service. Each temperature connection shall have a well that will withstand the maximum system pressure and whose velocity rating to withstand vibration exceeds the maximum fluid velocity to which the well may be subjected. Thermocouples material shall be compatible with the main process pipe material.



All external electrical connections of junction boxes and cabinets shall be made to terminal blocks. The wiring and terminal blocks for different voltage classes shall be physically separated in order to minimize electrical noise and hazard to personnel. Terminal blocks shall be provided with marker strips.

Instruments shall be mounted in a manner that prevents vibration effects. Snubbers or other suitable damping devices shall be provided for pulsating services.

8.8.2. Instrument Cabinets and Local Control Panels

8.8.2.1 Local Instrument Cabinet Installation

Instrument cabinets shall be secured to structural steel or to concrete. Cabinets shall be electrically grounded. Bolting to bare or galvanized metal shall be used for attaching a ground strap.

Instrument cabinets shall have sufficient clearances for the required blowdown piping and headers, door swing radius, etc., and that cabinets are completely accessible for maintenance.

The cabinets shall be installed and anchored in place so that they are level and plumb and properly aligned in accordance with the above mounting requirements.

Cabinets shall not be supported by handrails. All instrument line penetrations into instrument cabinets shall be through bulkhead fittings (couplings). Bulkhead couplings shall be supplied on instrument cabinets for each instrument location. Top entry of instrument cabinets or instrument cabinet junction boxes is prohibited. Bottom entry is the preferred method for conduits.

8.8.2.2 Local Instrument Cabinets

Local instrument cabinets shall be constructed of high-quality galvanized commercial 12 gauge sheet steel plate or stainless steel, flat and free of pitting. All cabinet sections shall be continuous with no weld joints. Welding shall join seams between assembled sections. Cabinet doors shall have 3-point latches.

The cabinets shall be provided with thermostatically controlled heaters and fully insulated for freeze protection and humidity control. The cabinets shall be designed to maintain an inside temperature of 60F with an ambient temperature of 0F.

Each cabinet shall contain an instrument air supply bulkhead. All instrument air supply lines shall contain tubing valves for isolation purposes. Every air supply shall contain a valved outlet for maintenance uses.



8.8.2.3 Cabinet Painting and Coating

All sheet steel used in the construction of the cabinets (except stainless steel) shall be suitably painted.

8.8.2.4 Instrument and Control Wiring and Instrument Cabinet Wiring

Instrumentation and control wiring shall be installed in accordance with the requirements of the Electrical section.

Both ends of each wire shall be identified with labels, which are indelibly imprinted on heat shrinked plastic tubing. Wire identification shall consist of a from-to device identifier.

8.8.2.5 Painting and Coating

Where galvanized coating has been removed or degraded due to cutting, welding, scratches, etc., it shall be refinished to original manufacturer’s specifications.

The Seller shall touch up all equipment finish paint coats damaged while under the control of the Seller. The Seller shall use paint of the original specification color, and finish.

8.8.2.6 Marking

The Facility shall include stamped stainless steel tags for process root valves, each instrument, and panel or cabinet.

8.8.3. Instrument Tubing and Piping

8.8.3.1 Instrument Tubing

Tubing usage shall be permitted for the following applications:

Inside local instrument cabinets

At a pneumatically-operated final control element

Sample lines

When properly protected and supported from root valve to instrument

All tubing shall be ASTM 213 type 316 stainless steel (except in acid service), both seamless and annealed and properly rated for temperature and pressure applications. Copper tubing shall be ASTM B-75 and shall be permitted only for instrument air service inside instrument cabinets and (individual) branch applications.



Tubing shall be installed so that sags and low spots are avoided. All tubing cuts shall be made with a roller-type tubing cutter and shall be deburred. All tubing bends shall be made with an approved mechanical bender to avoid flattening of the bends.

All tubing fittings shall be compression type, Parker Hannifin CPI or Swagelok. The use of flared-type fittings shall not be accepted and is strictly prohibited. Pipe dope or Teflon tape shall not be used on the tubing-side threads of compression fittings.

Tubing runs requiring support shall be run in Tube Track.

Each instrument sensing line shall terminate with a main line class blowdown valve mounted adjacent to or below the instrument cabinet.

Instrument sensing lines for draft measurements and other very low pressure and differential pressure measurements shall be 1-inch minimum O.D. Instrument sensing lines for other pressure and differential pressure measurements shall be 0.5-inch minimum O.D. The length of the sensing lines shall be kept as short as possible to minimize instrument sensing errors

Tubing used to connect instruments to the process line will be 3/8 inch OD x 0.049 WT seamless soft annealed copper ASTM B-75 (Instrument air service) or 3/8 inch OD x 0.065 WT SS seamless ASTM A-213 or A-269 Type 316 RB 80 Hardness as necessary for the process conditions.

Instrument tubing fittings will be the compression type. One manufacturer will be selected for use and will be standardized as much as practical throughout the Facility. Differential pressure (flow) instruments will be fitted with three-valve manifolds, while two-valve manifolds will be specified for other instruments as appropriate.

Instrument installation will be designed for correct sensing of process variable. Taps on process lines will be located in such a manner that sensing lines do not trap air in liquid service or liquid in gas service. Taps on process lines will be fitted with a shutoff (root or gauge valve) close to the process line. Root and gauge valves will be main-line class type valves.

Instrument tubing, including freeze protection, will be supported in both horizontal and vertical runs as necessary. Expansion loops will be provided in tubing runs subject to high temperatures. The instrument tubing support design will allow for movement of the main process line.

8.8.3.2 Instrument Piping

Instrument piping, when required for proper protection, shall be in accordance with the main process piping design. Instrument pipe wall thickness shall be based on the main process pressure and temperature design.

Piping runs shall be installed with continuous slopes to process connection or instrument connection as required.



Instrument line pipe shall be bent whenever possible.

8.8.3.3 Instrument Tap Installation Criteria

Each instrument tap shall have a main line class root valve. Instrument pressure taps in horizontal process piping should generally be mounted on the top centerline where the process is air or gas. When the process is steam or a liquid, instrument pressure taps should generally be mounted on the side centerline of the process pipe. There shall not be any instrument taps on the bottom of process lines.

Instrument pressure taps shall be located such that there is undisturbed flow in the area of the tap. Thus, there should not be any device or component which could cause flow disturbance for a distance of at least 10 pipe diameters upstream and downstream distances should be no less than one foot.

Thermowells should generally be mounted on the top center line of horizontal process piping. Thermowells should generally be located at least 5 pipe diameters or one foot (whichever is greater) downstream of any instrument pressure tap or flow tap.

8.8.3.4 Piping Supports

Hangers and supports shall be located such that sags and low spots in piping are avoided. The design shall consider the relative motion that may exist between pieces of equipment due to thermal expansion and/or vibration. As necessary, the Facility shall include expansion loops where required.

8.8.4. Air Piping, Fittings, and Pneumatic Devices

All instrument air piping shall have low point drains and all vertical risers shall have collection pots and drains.

Instrument air secondary branch headers for the supply of instrument air to analog control equipment shall not be used to supply solenoid valve operated air cylinders.

An air filter pressure regulator with outlet gauge shall be supplied for each individual instrument air user. The air filter pressure regulators shall be mounted on the instrument air piping near the end user using a flexible hose connection between the regulator and the end user.

All instrument air piping and tubing shall be purged of extraneous material by blowing clean, dry, oil-free air through the system before final connection.

All pipe threaded fittings using either Loktite, pipe sealant with Teflon or Teflon tape to seal the connection. The use of lead base pipe dope is not acceptable.



8.9. Steam/Water Sampling and Analysis

The sampling and analysis system shall be provided to monitor the quality and detect any deviation from control limits so that corrective action can be taken.

Grab samples are taken from various points for analysis.

8.10. Vibration Monitoring System

State-of-the-art vibration monitoring equipment shall be provided for the CTG and all large rotating machinery, including motors and pumps/fans over 500 bhp. The vibration system shall be complete with vibration sensors and monitors. The vibration information shall be available to the operator, maintenance people, and plant engineer’s office.

8.11. Plant Siren System

The Seller shall provide a plant siren system, which shall provide a sound level minimum of 5dB above ambient levels through out the plant.

Consideration shall be given to which type of loudspeakers is more suitable for the environment to which they will be subjected.

8.12. Instrument Calibration

All instruments shall be field calibrated per manufacturer’s specification after installation at site. Calibration sheets shall be completed and handed over to the Purchaser for records and for future use. All instrumentation used in testing shall be calibrated within 60 days of a test.

8.13. I&C Maintenance Area Requirements

An I&C area in the maintenance area shall provide for I&C maintenance. The Seller shall furnish I&C area equipment which are generally needed in the I&C maintenance area.

The power feeds to the I&C Area shall not share a breaker with feeds to welding machines or to mechanical equipment in the maintenance area.

9. CIVIL AND STRUCTURAL WORKS

The civil and structural works shall include all investigations, assessments, permitting, design, construction, testing, inspection, etc. activities as required to complete the Facility in accordance with the minimum requirements of this specification and the requirements of all local, state and Federal codes and regulations.



9.1. Design Criteria

Unless superseded by law or regulation, these design criteria will govern the requirements regarding dead and live loads, other loads, and loading combinations in the design of structures. The loads specified herein are the minimum loads to be considered in the design.

Steel structures will be designed by either the working stress method (ASD) or load reduction factor method (LRFD).

Reinforced concrete structures will be designed by the ultimate strength method.

9.1.1. Dead Loads

Dead loads shall be considered as the weight of all permanent construction, including walls, floors, ceilings, stairways, all fixed empty vessels and equipment, built-in partitions, structures, fireproofing, insulation, piping, and electrical conduits.

9.1.2. Live Loads

Live loads shall be defined as those loads produced by the use and occupancy of the buildings or other structures and do not include environmental loads such as wind load, snow load, rain load, earthquake load, or dead load. Live loads on a roof are those produced (1) during maintenance by workers, equipment, and materials and (2) during the life of the structure by movable objects. Live loads shall be uniformly distributed over the horizontal projection of the specified areas, and shall have the minimum values noted below:

9.1.2.1 Platforms, Walkways and Stairs

A uniform live load of 100 psf will be used. In addition, a concentrated load of 2 kips will be applied concurrently to the supporting beams to maximize stresses in the members, but the reactions from the concentrated loads will not be carried to columns.

A uniform load of 50 psf will be used to account for piping and cable trays where applicable. Where the piping and cable tray loads exceed 50 psf, the actual loads will be used.

9.1.2.2 Pipe Racks

A minimum uniform load of 100 psf will be used for each level of the pipe racks. Where the piping and cable tray loads exceed 100 psf, the actual loads will be used. In addition, a concentrated load of 5 kips will be applied concurrently to the supporting beams to maximize stresses in the members, but the reactions from the concentrated loads will not be carried to columns.



Hangers for piping and equipment loadings, anchor forces and other restraining forces will be determined by engineering analysis. In areas where numerous miscellaneous small bore piping, conduit and cable tray loads will exist, an additional uniform load to be determined by the structural engineer will be added to the design loads.

9.1.2.3 Ground Floor (Slab at Grade)

Design will be based on equipment weight, storage or laydown weight or a uniform load of 250 psf, whichever is greater.

9.1.2.4 Thermal Forces

Thermal forces caused by thermal expansion of equipment and piping under all operating conditions will be considered.

When portions of a structure are not free to expand or contract under temperature variations, allowance will be made for stresses resulting from temperature change. When portions of a structure are subject to unequal temperature variations, allowance will be made for stresses resulting from the variation.

9.1.2.5 Dynamic loads

Dynamic loads will be considered and applied in accordance with the manufacturer, specifications, criteria, recommendations and industry standards.

Vibration Load shall be defined as those forces that are caused by vibrating machinery such as pumps, blowers, fans and compressors, and turbine generators.

All supports and foundations for vibrating equipment shall be designed to dampen vibrations and as required by the equipment manufacturers.

Where applicable, arising from multiple rotating machinery installations produce dynamic effects and are supported by or communicated to a framework, allowance will be made for such dynamic effects, including impact, by increasing the computed live load value by an adequate percentage.

For structures supporting elevators, machinery or craneways, design for impact shall be as required by ASCE 7-95.

9.1.2.6 Truck Loads

Roads, pavements, underground piping, conduits, sumps and foundations subject to truck traffic will be designed for HS-20-44 loadings in accordance with AASHTO Standard Specifications.



A surcharge load of 250 psf will be applied to the Facility structures where accessible to truck traffic.

9.1.2.7 Wind Loads

All structures will be designed for a basic wind velocity shown in Section 1.12.3.

9.1.2.8 Seismic Loads

Structures will be seismically designed in accordance with the requirements of the State of California

9.1.2.9 Other Loads

Other loads used to predict the structural response of structures include hypothetical loads representing the influence of piping, including water hammer, and loads at anchor points and electrical installations not included in the normal dead or live loads. Pressure or suction loads such as encountered in ductwork will be taken into account, including dynamic loads from operating equipment.

Earth Pressures shall be defined as the active and passive lateral forces associated with soil and hydrostatic pressures.

Handrails/guardrails for stairs, platforms or other uses shall be designed to withstand a lateral load of 20 plf or 200 pounds applied in any direction at any point on the top of the rail.

9.1.2.10 Allowable Stresses Concrete: In accordance with ACI 318 Code

Masonry: In accordance with the California State Building Code

9.1.2.11 Load Combinations

Appropriate loading combinations will be used for structural steel and reinforced concrete to comply with applicable codes and standards, and vendor requirements.

9.1.2.12 Factor of Safety

Minimum factors of safety for all structures, tanks, and equipment supports will be as shown below:

Overturning 1.50



Sliding 1.10 for seismic load1.50 for wind load

Buoyancy 1.25

Uplift due to wind 1.50

9.2. Site Preparation

Site preparation shall consist of clearing and grubbing and the placing and compaction of fill with slopes and embankments designed in such a fashion as to be stable and capable of carrying anticipated loads from either equipment or structures.

Materials from clearing and grubbing operations will either be removed from the jobsite and be properly disposed of or, if suitable, reused on site.

Erosion and sediment control measures shall be taken on a site wide basis to prevent or minimize erosion and sediment transportation associated with the new construction. Measures shall be in accordance with applicable codes, regulations and permits.

Root mats will be removed to a depth of not less than 6 inches below existing grade, and holes will be refilled with material suitable for embankment and compacted.Environmentally sensitive areas will be identified and protected during construction

9.3. Geotechnical Investigations

A detailed soils investigation shall be preformed, which shall be the basis for plant foundation work. The results of the investigation and recommendations shall be documented in an engineering report certified by a geotechnical engineer who is familiar with the various types of soils that exist in the area of the facility including the geologic and seismic conditions. The certified geotechnical report shall be made available to the Purchaser for information. The Seller shall be responsible for and assumes all risks associated with the site selection including but not limited to variations in soil quality, seismic conditions, contamination, etc.

The site preparation work and foundation selection shall be engineered to mitigate any effects of soil shrinkage and expansion and settlements. If necessary, soil stabilization, remediation, and/or piles shall be provided in the power block areas and other areas as required to ensure settlements and differential settlements are acceptable with respect to all settlement sensitive equipment including, but not limited to, the turbines.

The soils investigation shall also determine if the soils are corrosive to buried ferrous metals. The Facility shall include appropriate corrosion protection for all buried pipes in accordance with good engineering practice and this specification.



9.4. Surveying

The Seller shall perform the following:

Provide property survey and a property map of the site area and any required surveying outside the site boundary, if required.

Ensure that the plant arrangement, including the switchyard area, is within the property boundaries including set back requirements as well as any easement restrictions including any drainage or utility easements.

Survey the site and applicable offsite areas for underground lines, facilities or obstructions.

9.5. Site Development and Earth work

The site shall be developed as required for both the initial construction and the final operating conditions of the Facility. The initial earthwork services shall be performed based on the results of the geotechnical investigations and topographical surveys. However, the final site work shall meet all minimum requirements of this specification and as required by the detailed plant layout. The final site elevation shall be graded to above 100 year flood level. Site preparation shall consist of clearing and grubbing and the placing and compaction of fill with slopes and embankments designed in such a fashion as to be stable and capable of carrying anticipated loads from either equipment or structures.

9.6. Temporary Construction Facilities

The Seller shall provide all temporary facilities required to construct the facility including the items noted below. All temporary facilities shall be removed as required or upgraded to meet the final plant requirements.

Installation and maintenance of temporary construction access road

Installation and maintenance of construction parking and construction laydown areas

Construction trailers and facilities as required by construction, testing, inspection, engineering, supervision, management, etc. personnel

Adequate space shall be provided for Seller provided temporary trailer(s) for Purchaser’s construction and operation staff. Trailers shall be equipped with temporary furnishing, HVAC and set up for phone and high speed internet access during plant construction/commissioning until turnover, located on site, in close proximity to the power block construction and to the Contractor’s and Seller’s management and supervisory personnel trailers.



Use of or improvement of existing railroad spur close to the facility to allow off-loading of equipment, if required. Improvements to existing roads to transport equipment from the available spur to the site (if applicable).

Improvements to existing roads to transport equipment to the site, either temporary for construction purposes or permanent to support plant maintenance and operation activities.

Construction of temporary drainage facilities

Providing temporary erosion control during earthwork

Final grading and cleanup after the Facility is essentially complete

Restoration of all areas affected by the construction of access road, parking, and laydown areas following project completion (as required by Seller’s agreements)

9.7. Facility Grading

Facility grading includes the following items:

Shape the natural grade as required to accommodate permanent Facility equipment and construction facilities while minimizing earthwork

Obtain proper cross section, longitudinal slopes, and curvature for roads

Raise grade if necessary to eliminate flooding from external water courses due to the 100-year rainfall. The 100-year runoff from up hill drainage areas shall be diverted around the Facility and returned to the natural drainage course in a manner acceptable to the permitting agency. The plant grade shall be located at least [3] feet above 100-year flood level

Construct adequate in-plant surface drainage to discharge the 10-year runoff without flooding roads and the 50-year runoff without flooding plant facilities

Excavation for storm water pond dikes

Obtain proper area slopes to provide drainage without ponding.

Construct stable, erosion-resistant earthen side slopes

Preparation of sub-grade for foundations, including consolidation, soil remediation, mass excavation and backfill, pile driving, etc. as required to mitigate unacceptable settlements and to provide sound bearing for the facilities. These provisions shall meet or exceed the requirements noted in the geotechnical report.

Preparation of sub-grade to receive fills, where required

Prepare site grading that shall incorporate site slope, site drainage, road and erosion protection

Root mats will be removed to a depth of not less than 6 inches below existing grade, and holes will be refilled with material suitable for embankment and compacted.

Environmentally sensitive areas will be identified and protected during construction.



9.7.1. Earthwork

Excavation, grading, backfilling, and compaction will be performed as dictated by the soil characteristics of the site, geotechnical study, the Facility design criteria, applicable codes and standards, and good engineering practices. Earthwork will be performed in accordance with applicable regulations and permits.

The work will include removing and disposing of unsuitable materials such as organic matter from areas on which fill is to be placed, and excavating and deposing of materials from areas where existing grade is to be raised. Grading of cuts, fills, and drainage ditches will be provided as required.

At no time will filling operations proceed when the ground or fill material is water soaked.

9.7.1.1 Grading

Graded areas shall be smooth, compacted, free from irregular surface changes, and sloped to drain.

Final grade adjacent to equipment and buildings will be at least 8 inches below finished floor slab unless otherwise specified, and will be sloped away from the building to maintain proper drainage.

Finish site grading shall be adequately established to deter surface pooling and promote surface drainage away from equipment and structures.

9.7.1.2 Backfilling

Areas to be backfilled will be prepared by removing unsuitable material and rocks. The bottom of an excavation will be examined for loose or soft areas. Such areas will be excavated fully and backfilled with compacted fill.

Backfilling will be done in layers of uniform, specified thickness. Soil in each layer will be properly moistened to facilitate compaction to achieve the specified density. In order to verify compaction, representative field density and moisture-content tests will be taken during compaction.

Granular load-bearing backfill will be sound, durable crushed rock, clean sand and/or gravel.

Selected suitable backfill material will be available at the site or borrowed as required to satisfy Facility design criteria.

Trench bedding material will be clean sand, as required.



Where it is necessary to remove only a portion of the unsuitable materials and backfill, the backfilling operation will begin by stabilizing the existing materials to enable proofrolling or normal construction equipment to operate thereon.

9.7.1.3 Compaction

Structural fill supporting foundations, roads, and parking areas, shall be compacted to a minimum of 95% of the Modified Proctor maximum dry density in accordance with ASTM D1557. Embankments, dikes, and backfill surrounding structures shall be compacted to a minimum of 90%. General backfill shall be compacted to at least 85%.

Areas compacted by hand-operated mechanical tampers shall be compacted to the same minimum compaction as the rest of the fill. Care shall be taken so that the fill in these areas is integral with the rest of the fill.

9.7.2. Clearing and Grubbing

Areas to be graded shall be cleared of all vegetation. Waste from clearing shall be disposed of offsite in accordance with state and local regulatory requirements.

9.7.3. Stripping

All topsoil and other organic materials shall be stripped from the areas to be graded before starting earthwork. Topsoil shall be placed in a temporary stockpile for later recovery and use for landscaping the site. The stockpile shall be provided with temporary erosion control facilities. Unused materials shall be disposed of offsite unless approved by the Purchaser.

9.7.4. Disposal of Unusable Soils

Excavated materials unusable for fills shall be spread on site. These materials shall be graded so as to not interfere with proper drainage off the site nor result in the creation of any potential wetlands. Any material unsuitable for reuse shall be disposed off-site in accordance with the requirements of state and local authorities.

9.7.5. Erosion Control

Temporary facilities shall be provided for control of erosion and turbid runoff during earthwork operations and from graded areas until they are stabilized. Temporary facilities shall be acceptable to local authorities. The Seller shall be responsible for obtaining any necessary erosion control permits.

Permanent erosion control facilities for surface runoff as required for ditches and slopes, such as riprap, headwalls, grass, rock surfacing and slope pavement shall be provided and acceptable to regulatory agencies and Purchaser.



All excavations shall be carried out and supported in such a manner as to prevent flooding or ponding of water, damage or interference to structure, services or stored equipment/materials.

Excavations for foundations shall be sealed with a concrete mud mat or seal slab, if required, as soon as possible after being excavated and inspected.

Fill materials shall be suitable for the intended purpose and shall not include materials hazardous to health, material susceptible to attack by ground or groundwater chemicals, material susceptible to swelling or shrinkage under changes in moisture content, highly organic or chemically contaminated materials or any other unacceptable materials. The Seller is solely responsible for the removal or replacement of existing contaminated soil, buried debris or foundations whether or not the Purchaser is aware of contaminated soils or unacceptable soils on site.

Compaction of fill materials shall be carried out as soon as practicable after deposition of fill materials. Fill shall be compacted to the densities appropriate to the design requirements, fill type and depth of layers.

9.7.6. Existing Underground Facilities

The Seller shall be totally responsible for identification, disposition, redesign, relocation, removal, etc. of any underground lines, utilities, obstructions, etc. that are present within the Facility, or outside the Facility if work is to be performed outside the Facility.

Normal precautionary procedures shall be used when excavating to mitigate the potential for property damage or personal injury should unknown obstructions or materials exist.

9.8. Access

The Seller is responsible for the heavy haul route and for any necessary improvements. The Seller shall coordinate this work with other entities as required.

9.9. Water Discharge Systems

The Facility shall be provided with the following water drainage and discharge systems:

Clean storm water discharge system

Oil-contaminated water discharge system

Process wastewater discharge system

Sanitary wastewater discharge system



9.9.1 Clean Storm Water Discharge System

Storm water within the project site, that drains areas that do not contain oil or chemical containing equipment and tanks, or are not areas of loading for oil or chemicals, shall be collected in a storm water drainage system. Effluent shall be conveyed and discharged into the natural drainage course in accordance with 40 CFR Part 43 and the requirements of the Facility’s NPDES permit. The Seller shall obtain any required discharge permit

Stormwater management practices will follow the California Storm Water Quality Association (CASQA) California Storm Water BMP Handbook, Sections TC-20 and TC-22. Anticipated storm runoff is estimated at approximately 1.46 inches per hour under a 50-year storm event.

Surface drainage systems inside the Facility shall be sized to discharge the 10-year, 24-hour runoff without flooding roads and the 50-year, 24-hour storm event without flooding the Facility and equipment. The storm events shall be as defined by U.S. Department of Commerce, Technical Paper No. 40, Rainfall Frequency Atlas of the United States, or local regulations if more stringent.

The following areas shall be provided with a storm drainage system:

Entire power block area within the loop road around equipment

Administration/control/maintenance building and adjacent parking lot

Building roof drains

The storm drainage system consists of catch basins for collecting surface water and an underground piping system with manholes at all junction points and turns.

The storm water runoff system shall be designed and constructed in accordance with ASCE Manual No. 77 - ”Design and Construction of Urban Storm Water Management Systems” or local jurisdictional code whichever is most stringent.

Roof drains from the administration/control/maintenance building, shall discharge directly into a storm water dischage system and not flow over parking lots, ground slabs, etc.

All areas not drained via storm discharge system shall be drained via an open ditch system consisting of trapezoidal ditches with culverts at roads.

When culverts are utilized, the inlets and outlets shall be provided with permanent erosion protection.

The slope angle for ditch side slopes shall not exceed 3H to 1V. If a steeper slope is provided, appropriate slope protection shall be provided.



9.9.2 Oil-Contaminated Discharge Systems

An oil water system shall be provided to collect discharges from areas which have potential for oil contamination, including the following:

Floor and equipment drains with the potential for contamination with oily wastes

Turbine area floor and equipment drains

Feed pumps

Maintenance area (including air compressor room/ area)

Storage area (Lube oil drums)

Areas where only minor oil leakage is possible shall have equipment skid attached containment for local collection and subsequent cleanup, when required.

Oil contaminated runoff shall be directed by gravity to an oil water separator. Oil water separator effluent shall be combined with other onsite wastewater streams and routed to the wastewater sump. The oil water separator shall be provided with sludge removal facilities and if required an integral effluent pump structure. The following shall be provided:

One double-wall steel oil separator shall be provided

Coalescing plates providing 15 mg/l effluent quality

Waste oil transfer pump to transfer oil to a tank truck for disposal

Packaged effluent lift station with two 100%-capacity pumps

Pipeline to transport effluent to the wastewater sump

All equipment, having the potential to spill oil and not buried underground, shall be contained in a curbed area in order to prevent spillage.

Underground gravity lines carrying oily wastewater will require double containment piping.

General plant oily waters shall be collected in an oily water collection system. These waters include oily equipment drains from the combustion turbine area, fire pumps and workshop oily drains.

Oily waste from the transformer areas shall be collected in a transformer oil collection basin. The oil collected in the basin shall be pumped out periodically.

9.9.3 Process Wastewater Discharge System

Discharges to the process wastewater system shall be non-oily wastewater with a potential for chemical contamination. These include equipment drains such as area or building drains that contain potentially chemical contaminated runoff. These areas shall be collected using floor drains, trenches or sumps and piped to the wastewater sump. At a minimum the following areas shall be included.



Water treatment facility floor and equipment drains

Chemical bulk storage area building drains

Chemical tank spill containment area drains

Chemical truck spill containment area drains

Sample panel building drains

Chemical lab sink drain

Battery room emergency shower and eye wash drains

Batteries shall be provided with a curbed containment within the battery room.

Process wastewater, including blowdown and equipment drains shall be pumped to wastewater sump. Major discharges shall be contained and cleaned up as required. Miscellaneous Valved Storm-Water Runoff

Transformer spill containment basins shall have a sump with valved outlet for draining collected rainwater to the clean storm water runoff drainage system.Plant process water is supplied by PG&E Well No. 2. Key plant process uses include engine cooling systems (air radiators), closed cooling water system for auxiliary equipment, preheating for jacket water and turbine washing. Drips from process water that has been used in engine cooling, liquid that has dripped from seals, condensate from compressors, and area wash downs are all collected in a system of floor drains, hub drains and piping routed to one of the five oily water collection pits. The level in these sumps is routinely monitored. Accumulated liquid is periodically pumped to the oily water separator. Accumulated sludge is removed by a licensed hazardous waste transporter to a permitted recycling facility or hazardous waste disposal site. Due to the small amounts of discharge and the disposal method, the amounts of liquid discharge ( 0.32 gpm) would be less-than-significant.

9.9.4 Sanitary Wastewater Discharge System

The sanitary discharge for each building shall be collected. Sanitary wastewater shall be collected by gravity, discharged to a lift station, if required, and preferably pumped to the nearest off-site connection point available in the local jurisdiction’s sanitary waste system. The system shall be designed and installed in accordance with all state and local requirements. If applicable the Seller shall contract with the local jurisdiction to receive sanitary sewer discharge from the Facility at a price acceptable to Purchaser. Sanitary lines shall be of PVC pipes and shall meet the building codes for the local jurisdiction. Alternatives to sanitary wastewater collection may be as follows, subject to approval by Purchaser and to meeting all local and state requirements and permitting restrictions:

Septic treatment system, and discharged via percolation into the ground.

Packaged sanitary wastewater treatment plant and then discharged to a natural water course or through cooling water blowdown discharge facilities.

Waste stabilization pond and discharged to a natural water course.



9.10. Roads, Parking Lots, and Walkways

The plant roads shall be asphalt concrete on sub-base of properly stabilized soil aggregate mixture. All other areas around and below the power block equipment shall be bituminous asphalt on sub-base of properly stabilized soil aggregate mixture. The paving and sub-base thickness shall be based on design and construction traffic loads. The main plant road shall be a minimum of 25 feet wide. The road inside of the switchyard area may be rock surfaced only. All road surfaces shall be designed and paved to allow for proper drainage (puddling of water is not acceptable) and to allow transportation of heavy equipment and materials throughout the plant.

Where mobile cranes will be located for lifting of heavy equipment associated with the combustion and steam turbines, a single concrete pad shall be provided per crane position. Pad area shall be sufficient to enable crane adjustment for lifting.

9.10.1. Facility Roads

The main Facility access road shall be connected to an existing terminal point of an adjacent public access road to the Facility. Similarly, a secondary (emergency) plant access road shall also be provided and connected to an alternate public access road or as approved by the Purchaser. These intersections and roads shall meet all applicable local, county and state requirements and shall be approved by local authorities as required.

A looped interior Facility road shall be provided around the power block area. Other interior Facility roads shall be provided where access is required to equipment, pump structures, or entrances to buildings or enclosures. The location and extent of facility roads shall be indicated on a General Arrangement Site Development Plan drawing provided by the Seller to the Purchaser for approval.

9.10.2. Road Width and Clearance Requirements

The minimum road widths shall be as follows:

Road Total Width (ft) Paved Width (ft) Shoulder Width (ft)

Access Roads 33 25 4

Interior Roads 26 20 3

Entrances to Enclosures 22 16 3

Clearance requirements over roads shall be 22 vertical feet from high point of road to bottom of lowest overhead obstruction. Side clearance, from centerline of road to any significant off-road obstruction shall be 20 feet.



9.10.3. Road Pavement

Road pavements shall be designed for AASHTO H-20 truck loads and loads and be capable of supporting a 65-ton wheel-mounted maintenance crane.

Parking lot pavement and all accessible areas of the power block shall be designed for passenger cars and light trucks.

Design life of the asphalt pavement shall be 10 years.

9.10.4. Parking Lots

Paved parking lots for passenger cars and light trucks shall be provided adjacent to the control room, administration, maintenance, warehouse, and water treatment areas. The number of spaces shall be based on the number of plant personnel plus additional space for visitors and shift turnover as well as spaces required by regulatory agencies.

Stalls shall be 90 degree angle, 10 feet wide, 19 feet long.

At least one stall shall be provided for handicap parking in close proximity of the control, administration, and maintenance areas. Handicap stalls and location shall comply with requirements of the Americans with Disabilities Act (ADA) and local regulations.

All stalls shall be concrete or asphalt paved, striped, provided with precast concrete wheel stops and signage as required.

9.10.5. Chemical Unloading

Chemical unloading areas including truck pads shall be contained to prevent releases from entering the environment. Appropriate coatings shall be provided inside the containment areas.

9.10.6. Facility Area Surfacing

Final area surfacing shall be provided as follows:

Type Minimum Thickness

Location

Reinforced concrete 8 in. All chemical truck unloading and spill containment areas for water treatment chemicals and other hazardous chemicals

20 ft width in front of all roll-up doors



Type Minimum Thickness

Location

Maintenance pads around equipment required for maneuvering and positioning cranes, fork lifts and other wheeled-vehicles

Access areas to equipment (see below)

Wire mesh reinforced concrete

4 in. 5.0 ft wide sidewalks between building doors

Parking areas, and adjacent to parking areas

All areas around and under equipment within the power block

Base material or crushed rock area surfacing (well graded material with maximum size of 1”) (ASTM D2940, ASTM D448, Size No. 57 or similar)

Design cross section providing adequate load bearing capacity for equipment and vehicular traffic

All unpaved areas outside the loop road with the potential to support maintenance equipment, mobile cranes, fork lifts and other wheeled vehicles

Interior of the switchyard (if allowed)

Unpaved access pathways from loop road to equipment, enclosures

Base material or crushed road area surfacing (well-graded material with maximum size of 1”, ASTM D448, Size No. 57 or similar. Color or gradation to be distinguishable from drivable surface areas).

4 inches All areas loop road not requiring vehicular access

Areas requiring vegetative control, if required

Crushed rock area surfacing (ASTM D448, size no. 3)

Design cross section providing adequate load bearing capacity for equipment, 8 inches minimum

25 feet minimum on all unpaved sides of the cooling tower or width as required to run cranes used to remove fans, blades and motors.

Seeding or other appropriate ground cover

N/A All disturbed areas outside of the power block or otherwise unpaved or surfaced

Ditches

Crushed rock Good Engineering standard

Construction laydown areas



9.10.7. Surfacing Plan

The paving plan including cross-section shall be drawn on a copy of the general arrangement drawing. Asphalt and crushed rock surfaces shall be provided as required by Seller provided- Purchaser approved operation and maintenance plan.

Space shall be available and identified on the Facility site for maintenance laydown. This space shall be indicated in the paving plan.

9.11. Landscaping

The Facility shall include any landscaping of the facility as required by local requirements, zoning, permitting, or authorities. As a minimum, landscaping (with automatic irrigation systems) and signage shall be provided at the entrances, and landscaping adjacent to the administrative building areas.

9.12. Fencing and Signage

The plant property lines shall be identified with appropriate signage and fence.

Security fencing shall be provided around the entire Facility area with separate security fencing around the entire switchyard.

Site perimeter fencing shall be six foot-high chain link topped by an extension arm holding three strands of barbed wire at 45 facing out. (Fencing shall have pipe line posts at maximum 10'-0" centers, and a top and bottom tension wire.) Chain link fence, holding three strands of barbed wire, shall be recessed 1'-0" minimum inside the property line.

All posts, rails, fabric, wire, and gates shall be galvanized. Interior road gates and secondary plant access gates shall be 6foot high by 25 foot wide manually operated double swing gates. A secondary gate with lock shall be provided. The secondary gate location shall be reviewed and accepted by the Purchaser.

The fencing shall be grounded.

The gate across the main access road to the Facility shall be motor-operated slide gate designed for use on a gate for an industrial facility. Gate shall be designed to be operated both from the control room and locally using a card reader. A permanent goose-neck mounted card reader, standard mounted lighting fixture, an intercom and a fixed camera for viewing persons using the card reader/intercom shall be provided at the main gate. A gatehouse sufficient for 2 people with HVAC and communications (video to plant security systems and phone line)]

The storm water pond shall be isolated and locked separately, if required by local building officials.



The switchyard fencing shall be eight feet high and shall be considered independent of the Facility. The gates entering the switchyard shall be manually-operated gates. Fencing layout, including gates, shall be shown on the design drawings.

The fence shall be grounded to limit step potentials below the permissible touch levels of IEEE 80.

Rights-of-way shall be marked as required by code and law.

9.13. Buildings

The Seller shall supply and install all buildings as required for the facility. These buildings shall include control and maintenance building, water treatment building, electrical switchgear building, gas compressor building, and switchyard control building.

Power generation equipment need not be placed inside buildings provided the equipment is supplied with adequate enclosures and is suitably protected from the environment conditions at the site and maintenance work can be safely and efficiently performed. Noise attenuation measures shall be provided to meet all local, state and Federal requirements.

These buildings may be a pre-engineered building, provided all specified design criteria are satisfied as well as requirements by local, state and federal building codes and permitting agencies. Pre-engineered buildings shall be designed as partially enclosed in accordance with the requirements of the MBMA Low Rise Building Systems Manual.

The miscellaneous electrical equipment enclosures for the CEMs, Switchgear, MCCs, PDCs, fire water pump, etc. may be, modular, insulated weather-tight structures purchased with the equipment, provided all specified design criteria are satisfied in appropriate sections of this specification.

9.13.1. Location and Footprint of Buildings

The control and maintenance building shall be located in a centralized area in close proximity with the power block.

Plant buildings shall be designed to accommodate no less than the specified number of employees as determined in the plant pro forma.

Plant buildings shall be sized appropriately for a 30-year plant service life.

Adequate chemical storage space shall be provided for 30 days of operation.

Buildings shall be adequately sized and designed for ease of removal of large equipment .



9.13.2. Building Requirements and Sizes

The control and maintenance areas shall be arranged to provide sufficient space for plant operations and maintenance activities. These areas may be combined into one building (and may be one or two stories with a high-bay/low-bay arrangement). The maintenance area shall be designed with 20-foot (minimum) eave height. The control room, electrical switchgear room, battery room, instrument and electronics area shall have minimum 14-foot eave height.

The building(s) shall house areas including the control room, control equipment room, battery room, electrical equipment, communications room, and maintenance area including an I&C area. These building will be an enclosed, weather tight building. The high-bay areas will contain the plant maintenance area and shall include a roll-up steel door(s) to accept large pieces of equipment. The low-bay areas will contain the station control room, battery room, electronics room, offices, and washroom and locker area.

The control and maintenance areas shall be provided with power receptacles and telephone and communications connections, as required and applicable. The maintenance area shall be provided with service and instrument air drops, service water drops, and welding stations. The quantity and locations are subject to Purchaser approval.

The offices, control, and maintenance areas shall be designed to meet the requirements of the Americans with Disabilities Act (ADA), unless additional areas are required by local or state authorities.

Space allocation for the various buildings and work areas are as follows. Building and work areas sizes are approximate and will be finalized during the detailed design phase of the project

Buildings and Work Areas Size (Sq Ft) Minimum Inside Height (ft)

Buildings

Control and Maintenance Building 5,000 10

Water Treatment Building 5,000 18

Gas Compressor Building As required 20

Electrical Switchgear Building As required 10

Switchyard Control House As required 10

Control and Maintenance Building Rooms

Control Room 800 10

DCS Room 400 10

Communication Room 150 10

Men’s Locker Room and Restroom 200 8



Buildings and Work Areas Size (Sq Ft) Minimum Inside Height (ft)

Women’s Locker Room and Restroom 200 8

Lunch Room & Kitchen 250 8

File Room 200 8

Conference Room 400 8

Production Supervisor’s Office 200 8

Two Staff Offices (size per office) 150 8

Storage Closet 40 8

Janitor’s Closet 40 8

I&C Area 250 8

Maintenance Area 1,000 18

9.13.2.1 Control and Maintenance Building

The control and maintenance building shall include control room, office space and area facilities for all plant employees.

The control room will be sized for complete access to the control equipment and direct access to the site for operations. The room will be equipped with a raised computer floor a minimum of 12 inches above the recessed monolithic concrete floor unless otherwise approved by the Purchaser. The room will have incandescent lighting placed to reduce glare on the computer screens. Windows with window treatments will be provided, located to allow viewing of the power block area. Wiring for the control equipment will be behind walls or under the floor. Exposed conduits, will not be allowed in the control room. Electrical panels located in the control room will be wall-mounted units. Conduits and wiring shall not be exposed. No floor mounted panels are allowed.

The building will include offices for plant personnel, janitorial closet, storage closet, file room, lunch area, conference room, kitchen (with cabinets, fixtures, and appliances), maintenance area including I&C area, and men’s and women’s restrooms and locker rooms. The control room area will include the control room, DCS room, and communications room.

The facility shall include personnel doors and two sixteen-foot high by twelve-foot wide electric roll-up doors. The roll-up doors will be located to facilitate truck and forklift access to the maintenance area. Translucent panel skylights will be provided.

Reinforced concrete grade slabs in the maintenance area and I&C area will be treated with a floor hardener and oil-resistant sealer to accommodate maintenance or laydown. Interior partitions will be gypsum wallboard on metal studs. The walls between maintenance area and I&C area will be CMU material. The maintenance building will be an exposed structure, but the walls will have 10’ high interior liners to protect insulation.



Floor drains will be provided under the raised computer floor of the control room and in the maintenance area, I&C area, and restrooms. The men’s and women’s restrooms will be tiled and will be provided with full-size lockers (20 for men and 10 for women), benches, and showers.

A minimum of 15’ x 15’ reinforced concrete foundation, curbed and drained to the oil water separator, shall be provided adjacent to the building for a drum storage area. The building foundation shall have a grating covered trench which slopes to sump. The sump and trench should be drained to the oily waste sewer system.

9.13.2.2 Electrical Switchgear Building

The electrical switchgear shall be housed in a building preferably located near the control room. A reinforced concrete vault with checkered plate access covers will be provided below the switchgear equipment to facilitate cable access. Access to the electrical room will be provided by one 12 foot height by 10 foot wide roll-up door and double, hollow-metal fire rated doors to the outside. All areas will have an exposed structure with 10 foot wall liners to protect the insulation. The DC battery system will be located in the electrical switchgear building.

9.13.2.3 Water Treatment Building

Water treatment building area shall have a minimum eave height 20-feet and as required by equipment layout. The water treatment building will contain the water treatment equipment, water and steam sampling panels, chemical laboratory, controls and electrical equipment room, chemical storage area, and fire pump room. Three electric roll-up doors will be provided to facilitate forklift access to the chemical storage areas and water treatment equipment. A grating covered trench will be provided in the grade slab for drain piping. Particular attention shall be focused on sloping floors and adding drains around equipment to eliminate any pooling of water.

The interior of the water treatment building shall provide aisle space to maneuver a forklift truck, and to include a waste water sump facility. The water treatment building will be an open area with the exception of an electrical room and chemical laboratory. These rooms will be constructed of painted masonry units with a precast concrete roof. The monolithic concrete floor slab will have a chemical-resistant epoxy coating in areas exposed to harsh chemicals. Particular attention shall be focused on sloping floors and adding drains around equipment to eliminate any pooling of water. Reinforced concrete containment walls and curbs will be provided where appropriate to contain potential chemical spills. The area floor and equipment drains will be piped to a wastewater sump pit. Truck access will be provided for off-loading acid and caustic materials.

The chemical feed/sample panel building shall be sized for the equipment and to provide storage space for a minimum of 30 days of operation. The monolithic concrete floor slab will have a chemical-resistant epoxy coating in areas exposed to harsh chemicals. Reinforced concrete curbs will be provided where appropriate to contain potential chemical spills. The interior will be an open area. The exterior wall will be the interior



metal liner panel of the insulated metal siding. The metal liner panel shall extend the full height of the wall.

Along the outer side of the water treatment area an oil and chemical storage area shall be located. This area will be enclosed with a roof and two sides as a minimum. This area will be bermed. The size of the oil and chemical storage area will be at least 100 square feet with 8 foot height.

The fire pumphouse portion of the building will house the one electric fire water pump and one diesel fire pump and one jockey pump. Access doors will be provided for maintenance of the pumps.

9.13.2.4 Switchyard Control House

The switchyard control house shall be a single-story, insulated, pre-engineered metal building supported on a reinforced concrete foundation. The building will contain the relay protection panels and associated switchyard equipment and partitioned battery room with appropriate ventilation. Interior wall liners shall be provided to protect the insulation. The building will be provided with double doors sized to allow removal of equipment. A concrete driveway/parking area will be provided to facilitate maintenance access. Personnel access shall be through the switchyard fence side of the building.

9.13.3. Architectural

All buildings shall be weather tight with insulated metal siding and standing-seam roofing.

Buildings shall have insulated walls, roof, and ceilings designed to complement the specific building area use and optimize HVAC system design. For example, air conditioned areas shall use wallboard and non-air conditioned areas shall use 26 gauge steel liner panels.

The outside of the exterior building panels shall have a baked-on Kynar 500, or equivalent, coating system having a minimum of 70% Kynar resin. Wall insulation shall use a minimum R-13 fiberglass blanket insulation with UL 25 vapor retardant. The wall panel thickness shall be as required to provide an insulated wall heat transmission coefficient "U" per ASTM C236 not greater than 0.10 btu/hr-ft2

-F. The pre-fabricated modular equipment enclosures shall have the supplier’s standard industrial finish. All exterior doors shall have weather protection awnings or vestibules.

Roof slopes shall be within the range of ½ to 1 inch of rise per 12 inches of run. The outside of the exterior panel shall have a baked-on Kynar 500, or equivalent, coating system having a minimum of 70% Kynar resin. Minimum R-19 fiberglass blanket insulation with UL 25 vapor retardant shall be used and attached to the ceiling with metal components such that there shall be no sagging. Roof panel thickness and width shall be as required to provide a "U" factor of 0.08 or less and gauge and shape of panels shall be sufficient to withstand all design loadings without excessive deflection or vibration.



All buildings shall be provided with gutters and downspouts, routed to the storm drain systems

Suspended lay-in acoustical tile ceilings, vinyl composition floor tile with resilient base and recessed fluorescent lighting shall be provided in offices, restrooms, lunch room, conference room, storage areas, electronics room, and the control room. Partitions in the administration area will consist of painted gypsum board on each side of 3-5/8” metal studs. A folding partition shall be installed in the lunchroom. High bays buildings such as the maintenance area shall have high pressure sodium vapor lighting.

For high moisture areas, such as showers and locker rooms, ceilings shall have moisture resistant, lay in tiles. Unglazed ceramic tile shall be used on floors in high moisture areas such as locker rooms, showers and toilets.

Steel troweled surface hardened concrete shall be used in unfinished areas. Any chemical containment areas shall be of concrete construction and use barrier coatings or linings as required for the chemical environment.

All wall surfaces, ceilings, doors and frames shall be painted. The color scheme for the project will be selected by the Purchaser from color samples submitted by the Seller.

Windows shall be manufacturer standard aluminum, factory tinted, used in commercial or industrial applications, as appropriate.

Double doors with transoms shall be provided where required for equipment removal and access.

Doors shall meet the requirements of Steel Door Institute-recommended specifications 100-91, Grade II, Model 2. Doors shall be heavy-duty seamless-composite construction using 18 gauge galvanized face sheets. Door frames shall be formed of 16 gauge steel to the sizes and shapes required. Doors for the pre-fabricated modular equipment enclosures shall be the supplier’s standard for industrial applications.

Doors and frames in the outer limits of environmentally controlled areas shall be fully insulated. Where fire doors are required, the door, frame, and hardware shall bear a certification label from Underwriter’s Laboratories for the class of opening and rating.

Doors shall be finished with glass and glazing at the following locations: building entries and exits, control room, laboratory, hallways, offices and any other high traffic areas where viewing windows will help prevent the doors from being opened into oncoming traffic. Glass and glazing shall conform to the requirements for glazing materials for Category II products in accordance with the Safety Standards for Architectural Glazing Materials 16 CFR 1201, and installed in accordance with the publications of the Flat Glass Marketing Association.

The Seller shall provide locks on each door and ten (10) sets of a coordinated master key set for all lockable panels, hatches, covers, doors, etc.



Rolling steel doors shall be interlocking galvanized steel slats to withstand a wind pressure of 25 pounds per square foot. Doors shall be motor operated with manual override and three push-button control.

The personnel access way to and from buildings shall be provided with canopies or substantial overhangs to protect personnel from foul weather while entering and leaving the buildings.

Fire rated assemblies shall be provided when required by building or fire codes. Penetrations through partitions shall be provided with fire stops. Insulation shall be used for sound and thermal control in walls between and around finished rooms and air-conditioned areas.

The Seller shall supply all fixtures and appliances for the control/administration/ maintenance building. Seller shall provide commercial grade carpeting in all areas of the administration building with the exception of the control room, DCS room, communications room, restrooms, lunch room and kitchen areas. The carpet style and color scheme for the project will be selected by the Purchaser from samples submitted by the Seller.

The Seller shall provide interior furnishings as specified below. A list of furnishings and manufacture catalog number shall be provided for Purchaser approval. Piping and electrical conduit/equipment along the walls within the maintenance area shall be located to maximize the amount of space available for shelving.

9.13.4. Furnishings

As a minimum, the following furniture and equipment shall be provided:

Each staff office: 1 desk with chair; file storage, 1 book case, 1 guest chair, 1 computer workstation with 1 personal computer and 1 laser jet printer, 1 white board

Production Supervisor’s office: 1 desk with chair; file storage, 1 book case, 1 guest chair, 1 computer workstation with 1 personal computer and 1 laser jet printer, 1 white board

Conference Room: 1 conference table (no smaller than 4 ft x 8 ft) and chairs (minimum of 10); credenza; TV, VCR, DVD player, projection screen, and overhead projector.

File Room: file storage cabinets

Control Room: 2 Computer workstations including 2 personal computers and 3 printers. Necessary DCS workstations and printers.

Kitchen: All appliances including 1 refrigerator, 1 microwave oven, 1 oven/stove.

Lunch/Room: 1 table (minimum size 4 ft by 4 ft) and chairs (minimum 4)

In addition, the following tools and equipment shall be provided:

Laboratory: cabinets, bench, and testing equipment necessary to monitor cycle chemistry and to conduct tests for environmental compliance.



Maintenance Area: hand tools and tool boxes (1 set); shop benches; 1 drill press; 1 hydraulic press; 1 pipe threader machine; 1 band saw; rigging equipment (including an assortment of slings, chain falls (including two 1 ton, 2 ton, 3 ton and 4 ton), shackles, etc.; adequate supply of ladders; 1 A-frame structure on wheels for lifting; portable hydraulic lift; complete set of pneumatic tools; impact guns (including a ½ inch, ¾ inch, and 1 inch); oxygen and acetylene cylinder kit; shelving and storage devices, 1 computer workstations including 1 personal computers and 1 printer.

I&C area: shop tools and test equipment including but not limited to the following: I&C shop benches; 1 computer workstations including 1 personal computers and 1 printer; high voltage tester; clamp-on amp meters; megger; oscilloscope; amps power station relay tester; Calvin bridge; pneumatic test bench; dead weight tester or decade box; carbon pile high current breaker tester; analog meters, digital meters; 4-20 mA generators and receivers; temperature transmitters and receivers; temperature calibrator; electronic transmitter communicator; and shelving and storage devices.

The following computer and telecom equipment shall be provided:

Drawing management system; maintenance system; local area network; total of 7 personal computers and 7 printers; and telephones for each telephone connection.

9.13.5. Building Systems

The Facility shall include ventilation and air conditioning for each building. All HVAC and ventilation systems throughout the plant sized and installed appropriately for climate and dust control as defined in other sections

9.14. Foundations for Equipment and Structures

All equipment foundations and concrete structures shall be designed and built per manufacturer’s criteria, soil investigation, and geotechnical report.

Soil stabilization, remediation, piles, etc. shall be provided as required for all plant facilities including buried lines and facilities as required by the geotechnical investigation report.

Foundation analysis and design shall be performed for the combustion turbine generator, as recommended by the respective equipment manufacturers. All foundations designed for rotating equipment shall be adequate, and shall not be subject to failure due to induced vibration. Additionally, foundation for rotating equipment shall not result in unreasonable vibration levels, consistent with good engineering practice or violate OEM guidelines.

Foundation analysis for major equipment shall include the evaluation of total and differential settlement. At grade, outdoor tank foundations may be ring-type or reinforced concrete mat design. Tanks, equipment skids, pumps and supports shall be installed on raised slabs or pads for corrosion protection.



Dynamic foundation analysis shall be performed for the turbine generators. The design shall ensure that all foundations for rotating equipment are adequate, and will not be subject to failure due to induced vibrations. Additionally, foundations for rotating equipment shall not impart unreasonable vibration levels, consistent with normal utility industry practice, as well as OEM guidelines and specifications, to surrounding foundations and equipment

Grade floor elevation of buildings and the top of foundation for major outdoor equipment at grade shall be at a minimum 6 inches above the high point of finished grade elevation. All concrete shall be designed per applicable ACI standards.

Oil-filled transformer foundations shall have and integral reinforced concrete spill containment area. Ground wires shall be embedded in foundations and stubbed up at their final location to prevent a tripping hazard.

9.15. Concrete Work

Concrete design shall be in accordance with the latest release of American Concrete Institute (ACI), codes 318, 350, and 530.

Concrete design for the cooling tower basin, if required shall be appropriate for the design water chemistry inside the basin.

Exposed concrete floors within the administration, control, warehouse, maintenance, water treatment, chemical feed, and unloading areas are to have a brushed finish and be sealed to impart chemical resistance where such exposure is possible.

Duct banks which run under roads and maintenance areas shall be adequately reinforced to withstand anticipated loads.

9.16. Masonry Work

Structural masonry shall be design in accordance with ACI - 530; “Building Code Requirements for Masonry Structures.”

9.17. Steel Work

The steel structure to be used for pipe racks, the combustion turbine enclosures and warehouse/maintenance area shall be designed, fabricated, and erected in accordance with American Institute of Steel Construction specification.

Bolts and nuts for galvanized structural steel shall be hot dipped galvanized or zinc electroplated.

All hoist and monorail support beams shall be clearly marked with their rated capacity.



9.17.1. Steel Grating and Steel Grating Stair Treads

The steel to be used for grating and grating treads will conform to either ASTM A 36 or ASTM A 570. The ITW Ramset/Red Head Grating Disk system, or equivalent, will be used for fastening. Stair treads will be provided with nonslip abrasive nosings. The treads will have end plates for attaching to stringers. Grating will be of the rectangular type and consist of welded steel construction. Grating will be hot dip galvanized after fabrication in accordance with ASTM A 123. Outdoor grating will have a serrated surface. Grating will have at least a 1-inch bearing support and will be designed for a minimum live load of 100 psf. Deflection will be limited to 1/200 of the span.

Floor or platform openings around pressure vessels, piping, and equipment subject to expansion will be protected as follows:

Openings around penetrating objects exceeding 1-1/2 inches in width will be protected by toe plates

Openings around penetrating objects exceeding 8 inches in width will be protected by toe plates and handrails

Cutouts required for any type of penetration, including those to be made in the field, will be provided in the floor grating. Cutouts smaller than 6 inches will be banded with bars as thick as the bearing bars. Cutouts 6 inches and larger will be banded with a 1/4-inch-thick toe plate projecting 4 inches above the finished floor.

Additional support members for the larger opening will be provided as required.

The direction of bearing bars will be consistent within the floor framing system and they will be aligned with the adjoining section.

At the joints, the end of one section will be banded to prevent other sections from telescoping.

Surfaces on which the galvanized finish has been damaged, scratched, or defaced before acceptance will be cleaned and touched up with galvanized repair paint in accordance with the paint manufacturer's instructions.

9.17.2. Stairs and Ladders

Stairs will be provided for the purposes of traveling from one elevation to another. Vertical ladders may be provided only where personnel access is infrequent. Safety cages and/or other devices will be provided for fixed ladders per OSHA, and shall have landings no further than every 30 feet. Safety cages and ladder openings will include self closing gates.

9.18. Painting and Coatings

Painting and coating system including uniform color coordination for system designation



All painting and coating work shall include a final touch-up before turnover

Concrete shall be coated as required to protect against environmental conditions and chemical exposure

All exposed surfaces of the facilities shall receive a protective coating system.

All interior surfaces not coated shall be painted

Steel in high moisture areas, grating, embedded anchor bolts, assemblies nuts, washers, plates and assemblies are to be galvanized. Miscellaneous embedded plates shall also be galvanized.

All outdoor structural and miscellaneous support steel shall be galvanized in accordance with ASTM A123, ASTM A153, and ASTM A385. Indoor structures, such as building columns shall be painted. All paint coating systems shall consist of surface preparation, a prime coat and a finish coat. The Seller will submit for approval and use high quality paint products as manufactured by Ameron, Briner, Carboline, Ceilcote, DuPont, Glidden, Porter, Sherwin Williams, Tnemec and ZRC. The primary color for the plant and the color scheme for all buildings and enclosures shall be determined later by Purchaser for all primary external finish coat, trim, flashing, gutters, downspouts, louvers, doors, windows frames, roof panels, and exposed galvanized surfaces. The color of the finish coat shall be selected by the Purchaser from color samples submitted by the Seller. Surface preparation and paint system application shall be in accordance with the paint system manufacturer’s recommendations. The primer, intermediate coat and finish coat shall be from the same manufacturer.

The following protective coating systems shall be used unless approved otherwise by the Purchaser:

a. Exposed structural steel, steel piping, and equipment shall have a surface preparation as recommended by the paint manufacturer, a primer coat (2-4 mils DFT) of two component inorganic zinc and a finish coat (4-6 mils DFT) of semi-gloss polyurethane paint.

b. Steel areas where chemical exposures (acidic, neutral, and alkaline) are anticipated to occur shall have a surface preparation as recommended by the paint manufacturer, a primer coat (4-6 mils DFT) of polyamide epoxy paint, and a finish coat (2-3 mils DFT) of acrylic aliphatic polyurethane paint.

c. Externally exposed metal surfaces with service temperatures of 450F to 750F shall receive a SSPC SP10 surface preparation, a primer coat (2-2.5 mils DFT) of inorganic zinc silicate paint, and a finish coat (1.5 mils DFT) of silicone aluminum paint.

d. Environmentally controlled areas with interior concrete and concrete masonry components requiring painting shall have a surface preparation that is clean, dry and free of contaminants, a primer coat (thickness rate per paint manufacturer) of



masonry filler, an intermediate coat (2-3 mils DFT) of low gloss acrylic latex and a finish coat (2-3 mils DFT) of low gloss acrylic latex.

e. Exterior and non-environmentally controlled areas with concrete and concrete masonry components requiring painting shall have a surface preparation that is clean, dry, and free of contaminants, a primer coat (thickness rate as recommended by the paint manufacturer) of masonry filler, an intermediate coat (2-3 mils DFT) of water-borne acrylic paint, and a finish coat (2-3 mils DFT) of water-borne acrylic paint.

f. All drywall areas shall have a smooth, clean, and dry surface preparation, a primer coat (0.5 to 3.0 mils DFT) of sealer or thinned finish coat as recommended by the paint manufacturer, and intermediate coat (1-2 mils DFT) of low gloss acrylic latex paint, and a finish coat (1-2 mils DFT) of low gloss acrylic latex paint.

g. The interior surfaces of steel tanks for the storage of potable and service water shall have a SSPC SP5 surface preparation, and two coats of epoxy polyamide (each coat 4-6 mils DFT) meeting or exceeding the requirements of ANSI/NSF Standard 61 for potable water tanks.

h. The interior surfaces of steel tanks for the storage of high purity water shall have a SSPC SP5 surface preparation, a primer coat (4-6 mils DFT) of two component zinc-filled epoxy and a finish coat (4-6 mils DFT) of alaphatic amine epoxy.

i. The exterior surfaces of steel tanks shall receive a primer coat (4-6 mils DFT) of two-coat zinc-filled epoxy and finish coat (4-6mils DFT) of polyurethane paint.

Building exterior finish coatings shall be applied to all roof and wall panels and decks, wall louvers, flashings, gutters, trim and other exposed galvanized surfaces.

9.19. Design

The design shall conform to relevant aspects of the U.S. Codes and Standards as noted in Section 7. The design shall be based on the International Building Code 2003 Edition (IBC) or other applicable local or state building code, and the American Concrete Institute (ACI), and American Institute of Steel Construction (AISC). Where there is conflict between the building code, city code or state code, the provisions containing the most restrictive regulation shall apply and govern. All buildings, structures and equipment shall be designed and built to required seismic specifications.

Strength design shall generally be employed for reinforced concrete structures, and allowable stress design or load & resistance factor design for steelwork.

Wind, snow and earthquake loading shall be in accordance with IBC or local jurisdictional building code, whichever is more stringent.



The design shall take account of all applied loads, including dead, live, impact, thermal, dynamic, settlement, movement, seismic and other loading conditions where appropriate. Temporary loads during maintenance and erection shall be considered.

Platforms shall be designed for a minimum live load of 100 psf. Platform design shall employ the use of grating in lieu of checkered plate unless required for containment purposes. All handrail, toe plate, ladders, cages, gates, etc., shall be in accordance with OSHA Standard Rules and Regulations.

Pre-engineered building rafters shall be designed for the appropriate collateral loading from roof supports, HVAC ducts, cable tray and piping.

Grade slabs (turbine equipment laydown) shall be designed at a minimum for 300 psf. Ground floor slabs for areas and auxiliary buildings shall be designed at a minimum for 150 psf. Storage areas will be designed for actual weight of material but no less than 150 psf.

Snow, wind, and earthquake loading shall be in accordance with the IBC or local jurisdictional building code, whichever is more stringent.

All work shall be produced in accordance with the laws, regulations, and rules applicable to Professional Engineers practicing in the State where the facility is located, using due standards of care, skill and diligence. All design drawings and specifications produced shall be sealed by a Professional or Structural Engineer licensed to practice in the state where the facility is located.

Vendor-generated structural steel details, concrete reinforcing details and erection drawings are to be reviewed and approved by the Seller’s Professional Engineer, registered in the state where the facility is located.

Access doors and hand rails shall be designed and located for easy access for maintenance and inspections. Adequate hand railing and fall protection barriers shall be installed for maintenance activities.

9.20. Construction

All materials, workmanship, and testing shall be in accordance with the appropriate specifications, standards and codes of practice. Methods of quality control shall be clearly established and documented.

Working methods shall ensure the construction of stable structures able to withstand all applied loadings during construction and for the design life of the Facility without collapse, failure or excessive deformation such as to cause any damage, loss of function or any durability problems.

A permanent Facility benchmark shall be established on the Facility site by the Seller based upon USGS vertical datum. Settlement monitoring points shall be provided, with a



minimum of four points for each CTG foundation. The existing elevation at each point shall be inscribed on an embedded brass marker, before setting of equipment.

All welding shall be performed by welders qualified in accordance with AWS D1.1, using only procedures qualified in accordance with AWS D1.1.

9.21. Testing and Inspections

A program for testing soils during earthwork and when installation of underground utilities and foundations are performed shall be utilized.

The minimum moisture and density testing requirements for structural fill shall be 1 test per 75 cubic yards with at least one test under each foundation greater than 15 square feet.

In-place representative field density tests will be performed, preferably at the frequencies specified below in accordance with ASTM D 1557. The following frequencies will be increased in areas where apparent difficulties exist:

Fill Class Testing Area Frequency Cubic Yards per Test

A Structural Foundations 250 (or 1600 ft2 of each lift or once per work shift, whichever is more frequent)

B Backfill Surrounding Structures

(Same as Class A)

B Roads, Shoulders, and Parking Lots

650

C General Backfill 1800

In the event a compacted area fails to meet the specified compaction requirements, two additional tests will be performed for that area. If the results of either of the two additional tests-prove unsatisfactory, the area will undergo additional compaction and testing until test results meet the minimum compaction requirements

Records of inspection and testing of soils to ensure compliance with design assumptions shall be turned over to Purchaser and shall comply with good engineering and construction practices as well as the requirements of the local authority regarding notification and inspection. If pile supported foundations are to be used, the Seller shall conduct a pile load test program. The trial pile-testing program shall be submitted to the Purchaser for review at least two weeks before the start of the pile testing.

Testing and inspections of structures shall be in accordance with the California Building Code and other licensing requirements.

Concrete test cylinder sets shall be taken at the minimum rate of 1 set per day, nor less than once for each 150 cubic yards for slabs, foundations or walls. Concrete test cylinder



sets for paving shall be taken at the minimum rate of 1 set per day, nor less than once for each 150 cubic yards, nor less than once for every 5,000 square feet. As a minimum, one set of cylinders shall be taken for each equipment foundation, with exception that one set of cylinders may be made for each concrete truck load where multiple small foundations are poured from a single load. Test procedures shall be in accordance with the appropriate ASTM standards. Copies of test data shall be provided to the Purchaser.

The Seller shall utilize a system to validate type and grade of high strength bolts by sampling and metallurgical testing.

A testing program of high strength bolts and nuts shall be conducted by the Seller to assure that each bolt shipment meets the appropriate ASTM standards for dimensional tolerances and material quality.

All structural welds shall be subject to inspection in accordance with weld quality requirements provided in AWS D1.1. Critical welds shall be inspected as required and all other welds shall be subject to random inspection.

10. DOCUMENT SUBMITTALS

As part of its work scope, the Seller shall submit detailed documentation to the Purchaser to demonstrate the facility’s conformance with all specification requirements. This documentation shall include, but not be limited to, progress reports, specifications, design criteria, calculations, drawings, manuals, and schedules. The Seller shall submit this documentation for all areas of work to enable the Purchaser to fully understand the proposed design and to review it for compliance with the specification. A schedule for the submission of documentation defined below shall be agreed with the Purchaser. The individual submissions shall be provided to allow at least two weeks for the Purchaser's review before any commitment. In addition to the hard copies, documentation shall be provided in common electronic formats generally using Microsoft Office. Generally all drawings shall be provided in AutoCAD or Microstation format, and Vendor drawings shall be in AutoCAD or Microstation format.

All documents shall be in English. Units of measurement shall be US customary.

10.1. Documents To Be Submitted For Purchaser Review and Comment

Critical documents that define the overall conceptual design of the facility are required to be submitted for Purchaser review and comment following initial issue and each subsequent revision.

Other documents shall be submitted for information upon initial issue, issue for construction and final record.



Purchaser 's comments shall be forwarded to the Seller within 10 working days of the date documents are received in the Purchaser 's offices (receipt of email notification of document transmittal and availability of document at the designated FTP site).

The drawings and documents in the types and quantities indicated on the following table shall be provided by Seller to Buyer. After the first drawing or document submittal, submitted revisions shall be provided in the same quantities indicated for the first submittal, except where otherwise indicated on the table. The column headings are described below:

Buyer Review refers to drawing or document review, comment, and review as described in the contract. The stages are as follows:

— A = Buyer’s review, hold until release from Buyer

— I = For Information Only

— R = Buyer Review and Comments

First Issue refers to the type of issue of the referenced document to be submitted to the Buyer as the first formal submittal. Subsequent issues of “A” category drawing shall be provided to Buyer until last project issue for drawings issued for Buyer’s review and hold. Seller is not required to provide subsequent revisions of “I” and “R” category drawings, but Seller must provide the final version of “R” category drawings for review by Buyer before Last Project Issue.

Last Project Issue refers to the issuing of the final issue of the drawings for construction or the as-shipped drawings for manufactured equipment. Seller shall update lists to conform to Subsystem Turnover Package records, and the Last Project Issue drawings supplied by equipment Subcontractors shall correspond to the as-shipped condition.

As Built refers to a formal record or as-built design drawing issued by the Contractor or Seller revised to indicate all documented design modifications made during construction.

DescriptionBuyer

ReviewFirst Issue

Last Project Issue As Built

DESIGN DRAWINGS

Mechanical Design DrawingsPlant Arrangement Drawings A X X XPiping & Instrument Diagrams R X X XLarge Bore Piping Isometrics I XComposite Underground Piping Arrangements Dwgs R X XInstallation Detail Drawings I X XHVAC Drawings R X XHeat Balance Diagrams A X X XWater Balance Diagrams A X X X

Electrical Design DrawingsSingle Line Diagrams A X X XThree Line Diagrams R X XElementary Diagrams R X X X



DescriptionBuyer

ReviewFirst Issue


Interconnecting Wiring Diagrams or Termination Details

I X X X

Composite Raceway Drawings I X XCable Tray Layout Drawings I X XLighting Drawings for Control Rm. & Offices R X XLighting Drawings – Other I X XInstallation Detail Drawings I X XGrounding and Lightning Protection Drawings I X XDuct Bank Duct Number Drawings I X X

Control Design Drawings – Power Block and BOPLocal Logic Diagrams R X X XDCS Logic Diagrams R X X XDCS Graphics Drawings R X X XDCS Program Logic Diagrams R X X XTypical Installation Details I X X

Civil and Architectural DrawingsSite Grading and Drainage Drawings A X X XFoundation Location and Elevation Drawings R X XComposite Underground Utilities Drawings I X X XFoundation Drawings I X XConcrete Floor Drawings I X XRoad Paving and Location Drawings R X XTypical Detail Drawings I X XStructural Steel Drawings (including pipe racks) I X XBuilding Architectural Drawings A X X X

LISTSEquipment List I X XValve List I X XPipeline List I X XElectrical Load List I X X XCable Schedule I X XControl Instrument and Device List I X X XI/O List I X X XContractor Drawing List I X X XList of Vendor Drawings I X XLubricants Schedule R X X

REPORTSPlant Auxiliaries Electrical Load Flow and Fault Study R X XElectrical Relay Settings R X XGeotechnical Report I XCathodic Survey Study I E

CALCULATIONSMain Power Equipment Sizing Transformer Isolated Phase Bus Circuit Breakers

R X X(Changes

Only)

Short Circuit Study and Load Flow Calculations R X X(Changes

Only)



DescriptionBuyer

ReviewFirst Issue


Grounding Calculations R X X(Changes

Only)Cable Sizing Calculations R X X

(Changes Only)

Short Circuit Calculations for Switchyard R X X(Changes

Only)Select Civil/Structural Calculations (foundations, etc.) R X X

(Changes Only)

Equipment Sizing CalculationsSelect Mechanical Calculations (BFP sizing, sample system sizing calculations, etc.)

R X X(Changes

Only)Electrical Relay and Coordination Calculations R X X

(Changes Only)

MISCELLANEOUSDesign Basis/Criteria R X X

(Changes Only)

Vendor Drawings & InformationList of documents to provided for review. Selected drawings will be requested such as for BFP, Condensate pumps, condenser, cooling tower, water treatment, generator circuit breakers, HV breakers, transformers, etc.

I/R X X

Unpriced Equipment Purchase Orders and/or Specifications

I X

Soil Resistivity Tests I XOperation & Maintenance Manual(s) R X XVendor Test Reports I XGround Grid Resistance Tests I XCathodic Protection Soil Tests I XFlow Nozzle Tests I XMetering Tests I XInterconnection Design Information I X X XPipe Stress Reports (High Energy) I X

Seller shall furnish drawings, lists, calculations, test reports, and miscellaneous information in accordance with the table in this Appendix necessary for review of design and construction by the Buyer and for maintenance and operation of the Facility. All transmittals shall be accomplished via a secure FTP or project internet site, and shall be transferred by electronic files, in Word or Excel or in PDF, or Microstation formats. Any paper copies of drawings shall be provided by the recipient of the files.

Where equipment subcontractor-supplied drawings, calculations, test reports, or miscellaneous information includes the above information, the Seller is not required to redraw them, provided they indicate the information required and are properly cross-referenced to other information.



Plant arrangement drawings shall indicate the location of all-major mechanical equipment, major electrical equipment and panels, and major control and process control panels (including roll-out space or other maintenance access as appropriate). A site plant arrangement drawing shall also be provided showing the location of all buildings, major equipment, and plant roads. Equipment identification on these drawings shall match the equipment identification on the Equipment List.

Piping and instrument diagrams (P&ID) shall be provided for each plant system. These diagrams shall indicate all process piping, except vents and drains, regardless of size, with each line identified by size, specific line number, and piping class designation. All control valves and valves 2.5 inches and larger, equipment, mechanical devices (such as orifice plates), and instruments and control devices shall be identified.

Large bore piping isometrics shall be provided for each system indicating location, arrangement, and fabrication. Large bore pipe is pipe 2.5 inches and larger.

In lieu of single-line diagrams for panel boards, the Supplier may supply panel board lists with load descriptions for each panel circuit breaker. Lighting circuits will not require circuit numbers.

Three-line diagrams shall be provided for the following:

Generator step-up transformers, and station auxiliary transformers, including potential and current transformer circuits.

Medium-voltage switchgear, including potential and current transformer circuits, but excluding load circuits.

Elementary diagrams shall be provided for equipment and systems with hard-wired controls.

Interconnecting wiring diagrams or termination details shall be provided for controls and instrument circuits and will include the following:

Terminal point connection wiring

Circuit number

Both circuit ends or cross reference drawing number for unshown circuit end

Raceway drawings shall indicate cable tray in single-line or other form, wireway, and conduits 2.5 inches and larger. These drawings will include all cable tray, wireway, and conduit numbers, where applicable.

Supplier shall provide logic diagrams that will indicate logic control and configurations and interlocks.

Composite underground utilities drawings shall include information included on the site arrangement drawing (simplified where required for clarity).

Concrete floor drawings shall include design loads.



Electrical relay settings shall be provided in report form for all relays down to the 480 volt secondary unit substation breakers.

Subsystem turnover packages shall include pertinent construction data, the work required to place subsystems in service, and pertinent subsystem drawings.

10.2. Performance Curves

For operating conditions that are different from either International Organization for Standardization (ISO) conditions or guaranteed site rating conditions, the Seller shall supply the Purchaser, with expected performance curves and correction factors to cover the range of site conditions. This information shall cover the expected range of variation of the following: shaft speed, power output, compressor inlet temperature, atmospheric pressure, inlet and exhaust pressure losses, and effect of variations in fuel properties. Performance parameters indicated shall be power, fuel flow, water/steam flow rate, and heat rate (lower heating value). The following type of performance curves shall be provided:

Curves showing generator kVA output against field current through the entire power factor range

Curves showing reactive capability versus kilowatt load

Decrement curves for three-phase, line-to-line, and line-to-line to ground, short circuits, including effect of voltage regulator.

Regulation curve with excitation and speed constant.

Exciter load versus exciter voltage curves showing drooping characteristic.

Curve or data on the excitation and voltage regulation system characteristics showing generator stator, field and exciter per unit amperes vs. time. Specify which excitation system model type is representative of the equipment.

All applicable performance degradation curves, recoverable and non-recoverable

A curve of turbine heat rate versus turbine load NOx emission level versus load

10.3. Purchaser's Right to Receive Additional Documents for Information

The intent of this request is to enable the Purchaser to be cognizant of the engineering progress and to validate the work to be performed under the Contract.

In general, documents normally generated while performing engineering and design on this Project shall be available to the Purchaser for information. Typical documents expected to be produced include the following:

Equipment foundation design drawings

Rebar placement drawings

Area paving and drainage drawings



Structural steel plan, section, and detail drawings

Structural steel shop drawings

Building architectural drawings

Electrical duct bank, cable tray, conduit layout, and grounding and lighting drawings

Electrical load lists

Electrical cable and conduit lists

Electrical panel schedules

Plant switchyard drawings

Control panel internal wiring drawings

Instrument cabinet layout drawings

Instrument installation details

Control panel layout drawings

Piping isometric drawings

Underground piping and drains composite layout drawings

Valve lists

Line lists

Consolidated instrument index

Pipe hanger and support drawings

Protective relaying logic diagrams

Operating and maintenance manuals for all engineered equipment

Design studies

Stress analysis reports

Water hammer study for the circulating water system

Dynamic foundation analysis for combustion turbine generator

Short circuit analysis and voltage drop studies

Unpriced purchase orders

Operating instructions, including freeze protection plan.

Final purchase order, drawing, and vendor drawing lists

Instrument data sheets

Functional control logic diagrams

Completed control settings, to include both tolerance and actual values

Valve data sheets

Complete control system configuration documents and DCS I/O database



Setpoint for instruments (if not included in instrument index)

Vendor drawings, including detailed wiring diagrams

Final grounding and cathodic protection survey reports

Field electrical test reports

Geotechnical and foundation investigation

Relay settings and associated bills of materials and documentation sheets

Equipment and system startup records

Inspection certificates

Startup testing and procedures manuals

Critical civil/structural detailed design calculations. Specifically, combustion generator foundations, stack foundations, and design criteria or calculations for the pipe rack.

10.4. Documents To Be Submitted Before Turn over of Facility

Before Project completion, Seller shall update design drawings and other design documents as shown in Section 10.1 to reflect as-built information and provide electronic and hard copies to the Purchaser. Before submittal of these as-built documents, Seller shall provide the Purchaser access to field markup drawings and other documents required to support the Purchaser 's O&M requirements.

Isometrics shall be provided from the “as designed” 3D CAD model. Piping composite layout drawings may be provided for the above ground plant facilities. Underground composites shall be provided. Operational documents which shall be as-built, include P&ID’s, loop diagrams, one-lines, equipment lists, and interconnecting wiring drawings. As-built construction drawings for steel detail, pipe supports, rebar drawings, etc. will be provided as requested by Purchaser. All shop-fabricated pipe 2.5 inches or above shall be modeled. Non CAD drawings can be scanned for submittal on CD ROM.

10.5. Drawings and Lists

Drawings submitted shall conform to the following:

Size shall be as follows (metric sizes also acceptable):

A – 8.5 inches x 11 inches

B – 11 inches x 17 inches

D – 24 inches x 36 inches

E – 34 inches X 44 inches



The title block shall be in the lower right-hand corner of the drawing, and the drawing, when submitted, shall be folded to A size with the complete title visible. The title block shall contain the following minimum information:

Project name

Manufacturer's name

Manufacturer's drawing number

Brief title (clearly defining content of drawing)

Revision number and revision date

Scale and scale bar (when applicable)

Plant and equipment identification number

A space approximately 2 inches x 3 inches near the title block shall be left blank for approval stamps. A revision column adjacent to the title block shall define briefly the revisions made for each revision number.

10.6. Instruction Books and Operating Manuals

The Seller shall furnish the Purchaser with five bound sets and one electronic version using Microsoft Office for text and AutoCAD, Microstation, or Adobe format for drawings of complete clearly readable operating manuals. These instructions shall be in addition to instruction manuals prepared by individual equipment vendors and shall provide a brief description of how each system is put into service and normally operates and shall identify abnormal operating conditions likely to be encountered, along with a description of corrective actions that should be taken. These manuals are intended for use in familiarizing new employees with the facility and are not to provide detailed operating guidelines or procedures.

The equipment instruction books (operating and maintenance manuals) shall be issued before equipment shipment and shall include the following:

Equipment identification by equipment number, station name, and unit number and by function name.

Final reduced general arrangement and cross section drawings, warranted performance data, design data sheets, and performance curves for all equipment.

Complete installation/operation, troubleshooting and maintenance instructions.

Part lists shall be complete in every respect with parts identified by the original manufacturer's part number as well as by identification number.

Instruction books shall be specific to equipment supplied. The instruction book manuals and equipment instruction books shall be thoroughly reviewed by Seller before submittal, to verify that the instruction books apply to the specific equipment purchased.
