STORMWATER POLLUTION CONTROL PLAN - Connecticut · Corporation / Pratt & Whitney Division (UTC/Pratt & Whitney) to prepare a Stormwater Pollution Control Plan (SWPCP) for its facility

STORMWATER POLLUTION CONTROL PLAN

United Technologies Corporation Pratt & Whitney

Middletown, Connecticut

December 2015

Prepared for

United Technologies Corporation; Pratt & Whitney One Aircraft Road

Middletown, CT 06457

Prepared by

LOUREIRO ENGINEERING ASSOCIATES, INC. 100 Northwest Drive

Plainville, Connecticut 06062

An Employee Owned Company

Comm. No. 88UT245

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Table of Contents

Page

1. INTRODUCTION 1-1

1.1 Site Description/Existing Conditions 1-1

1.2 Proposed Drainage Pattern 1-2

1.3 Modification to the Plan 1-2

2. DESCRIPTION OF ACTIVITIES 2-1

2.1 Nature of the Construction Activity 2-1

2.2 Estimates of Areas to be Disturbed 2-1

2.3 Post Construction Runoff 2-2

2.4 Receiving Waters 2-2

3. CONSTRUCTION SEQUENCING AND CONTROLS 3-1

3.1 Site Disturbance 3-1

3.1.1 Initial Erosion Control Installation 3-2

3.1.2 Clearing and Grubbing 3-3

3.2 Site Restoration 3-3

3.3 Specific Operating Conditions 3-3

3.3.1 Erosion Controls 3-3

3.3.2 Dust Controls 3-3

3.3.3 Anti-Tracking 3-4

3.3.4 Washout Areas 3-4

3.3.5 Waste Disposal 3-4

3.3.6 Secondary Containment 3-4

4. POST CONSTRUCTION STORMWATER MANAGEMENT 4-1

5. INSPECTIONS, MONITORING, MAINTENANCE AND RECORDS 5-1

5.1 Weekly Inspections 5-3

5.2 Post-Rainfall Inspections 5-4

5.3 Post Construction Inspections 5-4

5.4 Monitoring 5-4

5.5 Maintenance 5-5

5.6 Reporting and Record Retention 5-6

5.6.1 Stormwater Monitoring Reports 5-6

6. TERMINATION REQUIREMENTS 6-1

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7. CERTIFICATIONS 7-1

7.1 Document Certification 7-1

7.2 Contractor Certifications 7-1

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FIGURES Figure 1 Site Location Map DRAWINGS Drawing 1 Construction Work Areas SWPCP Drawing 2 Construction Work Areas Drawing 3 Building 410 B410-PRA-1 (SWMU #6) Drawing 4 Building 410 B410-PRA-2 (SWMU #14) Drawing 5 SE & SC Details APPENDICIES Appendix A General Permit for the Discharge of Stormwater and Dewatering

Wastewaters Associated with Construction Activities Appendix B General Permit Registration Form Appendix C Inspection Logs and Summary Report Forms Appendix D Executed Certifications (Field Copy Only) Appendix E Stormwater Monitoring Report Appendix F Notice of Termination

ACRONYMS CFR Code of Federal Regulations DEEP State of Connecticut Department of Energy and Environmental Protection ETPH Extractable Total Petroleum Hydrocarbons GP General Permit PCB Polychlorinated Biphenyls RCRA Resource Conservation and Recovery Act RCSA Regulations of Connecticut State Agencies RSR Remediation Standard Regulation SMR Stormwater Monitoring Report SVOCs Semi-Volatile Organic Compounds SWMU Solid Waste Management Unit SWPCP Stormwater Pollution Control Plan SWPPP Stormwater Pollution Prevention Plan USGS United States Geological Survey VOCs Volatile Organic Compounds

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1. INTRODUCTION

Loureiro Engineering Associates, Inc. (Loureiro) has been retained by United Technologies

Corporation / Pratt & Whitney Division (UTC/Pratt & Whitney) to prepare a Stormwater

Pollution Control Plan (SWPCP) for its facility located at One Aircraft Road Middletown,

Connecticut (hereinafter referred to as “the Site”). This SWPCP has been prepared to provide

information and guidance on the management of stormwater discharges, associated with

construction activities conducted at the Site, in compliance with the Connecticut Department of

Energy and Environmental Protection (DEEP) General Permit for the Discharge of Stormwater

and Dewatering Wastewaters Associated with Construction (GP), reissued August 21, 2013. A

copy of the GP containing various conditions applicable to UTC/Pratt & Whitney is included as

Appendix A. A copy of the facility’s GP Registration Form is provided in Appendix B.

This document has been prepared using sound engineering practices and is consistent with the

2002 Connecticut Guidelines for Soil Erosion and Sediment Control and the 2004 Connecticut

Stormwater Quality Manual. This document will be maintained on-site for the duration of the

construction activity and will be used to minimize pollution caused by soil erosion and

sedimentation during and after construction and stormwater pollution caused by used of the Site

after construction is complete.

Remediation of the Site is required by the Resource Conservation and Recovery Act (RCRA)

Corrective Action Program, Section 22a-449c-105(h) of the Regulations of Connecticut State

Agencies (RCSA). Contamination at the Site includes volatile organic compounds (VOCs),

semi-volatile organic compounds (SVOCs), extractable total petroleum hydrocarbons (ETPH),

polychlorinated biphenyls (PCBs), and metals. Construction activities include excavation of

contaminated soil, off-Site shipment of soil contaminated with PCBs, consolidation of non-PCB

impacted soil beneath a DEEP-approved engineered control at solid waste management unit

(SWMU)-14, restoration of excavation areas to existing conditions, and capping SWMU-14 and

SWMU-6 with DEEP-approved engineered controls.

1.1 Site Description/Existing Conditions

The Site is owned by UTC/ Pratt & Whitney and is approximately 1,100 acres located on

Aircraft Road in Middletown, Connecticut. Approximately half of the Site is developed for

industrial purposes while the remaining portion of the Site is undeveloped. Figure 1 depicts the

topographic contours, major access routes, watercourses, and other relevant features in the

vicinity of the Site. As shown on Figure 1, the Site is located on the western bank of the

Connecticut River in Middletown, Connecticut. A broad bend in the Connecticut River forms

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the northern and eastern boundaries of the Site. There are several major ravines located at the

Site, including Dart Brook which is a small tributary to the Connecticut River. The Dart Brook

channel originates in the central portion of the Site and flows north and then east in a ravine on

the north side of SWMU-14. The Site contains approximately 53 acres of wetlands.

1.2 Proposed Drainage Pattern

The Site drainage areas are depicted on Drawing 1, SWPCP Site Plan. The facility contains eight

drainage areas associated with industrial activity. No changes to these drainage areas are

proposed or anticipated. The drainage pattern on the Site should remain the same once the

remediation project is complete.

Changes in grade will not occur between existing and proposed conditions in remedial

excavation areas. Changes in grade are proposed for SWMU-6 and SWMU-14 which are

associated with capping of the landfills. Although local drainage in the immediate vicinity of the

SWMU’s will change, drainage from both SWMU-6 and SWMU-14 will continue to discharge

to Dart Brook in Drainage Area 7.

1.3 Modification to the Plan

It is anticipated that the SWPCP may be modified to address future construction activities

outside the scope described in Section 1.1 above. In addition, the SWPCP shall be revised as

soon as practicable when:

• There is a change in a contractor or sub-contractor;

• There is a change in design, construction, operation, or maintenance at the Site which has

potential to discharge pollution to the waters of the state and which has not otherwise

been addressed in the plan; or

• If during any inspection, measures identified in the Plan to prevent pollution fail to

operate properly.

The commissioner may notify the permittee at any time that the Plan and/or the Site do not meet

one or more of the minimum requirements of this general permit. Within 7 days of such notice,

or such other time as the commissioner may allow, the permittee shall make the required changes

to the Plan and perform all actions required by such revised Plan. Within 15 days of such notice,

or such other time as the commissioner may allow, the permittee shall submit to the

commissioner a written certification that the requested changes have been made and

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implemented and such other information as the commissioner requires. Such information shall

be filed in accordance with the certification requirements prescribed in Section 7 of this SWPCP.

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2. DESCRIPTION OF ACTIVITIES

This section presents a description of the activities proposed at the Site. The proposed Site

conditions are depicted on Drawing 2.

2.1 Nature of the Construction Activity

The following activities will be performed during the proposed construction of the Site:

• Clearing and grubbing of the excavation areas and solid waste management units

• Creation of the contractor staging areas.

• Installation of soil erosion and sediment controls which will be maintained until construction

at each remediation area location is complete (see Section 3.1.1).

• Excavation of impacted soils to a depth of approximately two to ten feet.

• Off-Site shipment of PCB-impacted soil.

• Consolidation of non-PCB soil within an engineered control (SWMU-14).

• Placement of clean fill to restore excavation areas to existing grade as soon as confirmatory

sampling is complete.

• Restoration of excavation areas to pre-excavation conditions.

• Installation of engineered control and capping of SWMU-14 and SWMU-6.

• Restoration of areas affected by construction

2.2 Estimates of Areas to be Disturbed

Based on initial estimates, construction activities will result in disturbance of approximately 8.29

acres. However, this value may change slightly due to field conditions and/or confirmatory

sampling results.

Release Area Area (ft2)

B150-PRA-25 120

B220-PRA-40 18,750

B330-PRA-10 240

B330-PRA-19 512

B330-PRA-20 240

B330-PRA-27 6,160

B330-PRA-41A 2,147

B330-PRA-41B 4,115

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B330-PRA-42A 400

B330-PRA-42B 400

B330-PRA-42C 400

B330-PRA-47 15,411

B330-PRA-6 300

B330-PRA-8 2,700

B330-PRA-9 1,400

B440-PRA-21 400

B440-PRA-28 3,000

B440-PRA-29 5,975

B440-PRA-30 650

B450-PRA-7A 530

B450-PRA-8A 5,800

B450-PRA-8B 1,200

B450-PRA-9B 400

ECM-PRA-6 1,173

UND-PRA-1 1,100

SWMU-14 151,153

SWMU-6 136,778

2.3 Post Construction Runoff

The proposed excavations will be returned to current grade; no change in the drainage areas is

anticipated.

Although grading will change in the immediate vicinity of SWMU-6 and SWMU-14, both solid

waste management units will continue to discharge to Dart Brook within Drainage Area 007.

Runoff coefficients for each drainage area are provided on Drawing 1.

2.4 Receiving Waters

Under existing conditions, stormwater runoff generated at the Site generally flows into Dart

Brook, an unnamed tributary to the Connecticut River, and the Connecticut River as shown on

Drawing 1. There are no anticipated changes to drainage areas.

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3. CONSTRUCTION SEQUENCING AND CONTROLS

Soil will be excavated from numerous locations on the Site as depicted on Drawing 2. Excavated

soil will be placed in SWMU-14 for consolidation. The construction schedule and sequencing of

specific construction activities will be determined by the contractor responsible for implementing

the requirements of the general permit. The exact sequencing of construction activities will be

dependent on Pratt & Whitney facility operations. Confirmatory sampling will be conducted at

each excavation area to confirm that contaminated soil exceeding RSR criteria was removed at

each location. Clean fill will be used to restore excavated areas back to their initial grade. The

SWMU’s on the Site will be capped and graded in accordance with engineering specifications.

The sequence of excavations will be determined by the contractors.

Loureiro will be the construction manager on the Site and will oversee construction operation.

UTC/Pratt & Whitney will provide contractors with copies of permits, plans and approvals with

conditions containing limitations on how work is to be performed. AECOM will be the

contractor for the Site. It will be the responsibility of the contractor to independently review

each permit, plan and/or approval and address the conditions for performing the work. It will be

the responsibility of the contractor to provide continuous supervision of their respective work

and to ensure the supervision is well versed in the conditions of each permit, plan and/or

approval. It will be the responsibility of the contractor to comply with the conditions of each

permit, plan or approval as it relates to their work. It will be the responsibility of the owner, as

the registrant, to provide adequate resources to periodically visit the Site to verify conformance

with conditions as well as to periodically audit the records of the contractor to ensure adequacy.

During construction activities, discharge shall not cause pollution due to acute or chronic toxicity

to aquatic and marine life, impair the biological integrity of aquatic or marine ecosystems, or

result in an unacceptable risk to human health. The stormwater discharge shall also not cause or

contribute to an exceedance of the applicable Water Quality Standards in the receiving water.

3.1 Site Disturbance

This section presents a summary description of the planned activities that will result in

disturbance of the Site. While it is the responsibility of each contractor performing duties related

to stormwater, and soil erosion and sediment control as part of the Site remediation project to

comply with the terms and conditions of the General Permit for the Discharge of Stormwater

and Dewatering Wastewaters from Construction Activities, each contractor should take particular

notice of provisions related to stabilization of disturbed surfaces. Specifically:

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• Perimeter controls around remediation areas will be actively maintained until final

stabilization of the areas have been established;

• Excavations areas will be filled as soon as practicable after satisfactory confirmatory samples

have been obtained.

• Stabilization measures shall be implemented as soon as possible in accordance with the

current State of Connecticut Soil Erosion and Sediment Control Guidelines.

• Where construction activities have permanently ceased or when final grades are reached in

any portion of the Site, stabilization practices shall be implemented within seven days;

• Areas that will remain disturbed but inactive for at least thirty days shall receive temporary

seeding within seven days in accordance with the current State of Connecticut Soil Erosion

and Sediment Control Guidelines; and

• Areas that will remain disturbed beyond the planting season, shall receive long-term, non-

vegetative stabilization sufficient to protect the Site through the winter.

3.1.1 Initial Erosion Control Installation

The initial activities to be performed at the Site include the establishment of Contractor Staging

Areas and the installation of erosion controls around the perimeter of SWMU-14.

The construction activities will be initiated by the creation of the Contractor Staging Areas. The

Contractor Staging Areas will be constructed above the 500-year flood elevation. The location of

soil erosion and sediment control measures are illustrated on Drawings 3 and 4. Although the

exact locations have not been shown for the excavations they will consist of a combination of silt

fences and staked hay bales and will be installed and maintained in accordance with the

provisions of this Plan and other approvals of the Town of Middletown.

Erosion controls around individual remediation areas and disturbed areas outside remediation

areas will be installed prior to work being conducted in that specific area. Catch basins that are

located down gradient of remediation areas will have inlet sediment control devices (silt sack),

be covered with mats or surrounded by silt fence and hay bales to prevent sediment from

entering the catch basin.

The existing roadways will be used as transport roads during the transport of soil from the

remediation excavation areas to SWMU-14. The existing roadways will remain open and

available to Pratt & Whitney staff. The construction equipment will be decontaminated prior to

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movement over roads to prevent sediment accumulation on roadways. Vehicles leaving the work

area shall be inspected by the Contractor to check that no soil adheres to its wheels or

undercarriage. Such material shall be removed at the work area or decontaminated pad before

the truck is allowed to leave the Site. The detail for the construction of the decontamination pad

is depicted on Drawing 5.

3.1.2 Clearing and Grubbing

Excavation areas that are unpaved, including SWMU-14, and SWMU-6, will be cleared and

grubbed prior to construction activities. Plantings from the excavation areas may be removed as

living plants and stored within the staging area for reuse, if practical.

3.2 Site Restoration

As remediation of the Site progresses, temporary and final restoration activities will occur.

Excavation areas will be returned to initial pre-remediation conditions. Areas that were

previously vegetated will be re-vegetated and areas that were previously paved will be repaved.

The landfill locations, SWMU-6 and SWMU-14, will be capped and graded in accordance with

the DEEP-approved engineering specifications. Soil erosion and sediment controls will be

maintained as described above and will not be removed until such a time as disturbed areas are

paved or a suitable vegetative cover has been established.

3.3 Specific Operating Conditions

The contractor shall ensure that grading and related earthwork activities are conducted in

accordance with the following specific operating conditions.

3.3.1 Erosion Controls

The contractor shall install erosion controls as depicted on the drawings. Additional erosion

controls may be required based upon the stage of construction and the conditions of surface

stabilization. The contractor shall install additional erosion controls as needed to mitigate soil

erosion and to control sedimentation. Run-on/run-off controls shall be consistent with the 2002

Connecticut Guidelines for Soil Erosion and Sediment Control. Details of the soil erosion and

sediment control measures to be installed are depicted on Drawing 5.

3.3.2 Dust Controls

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The contractor shall minimize wind erosion and dust transport by ensuring that necessary dust

controls (watering, salts, mulch woodchips, etc.) are implemented and maintained during periods

of construction and operation.

3.3.3 Anti-Tracking

The contractor shall employ anti-tracking measures such as anti-tracking pads as depicted on the

drawings and as needed. The anti-tracking pads shall be constructed in a manner that is

consistent with the 2002 Connecticut Guidelines for Soil Erosion and Sediment Control.

3.3.4 Washout Areas

Washout of applicators, containers, vehicles and equipment shall be conducted in a designated

washout area. There shall be no surface discharge of washout wastewaters from this area. Such

washout shall be conducted outside of any buffers and at least 50 feet from any stream, wetland

or other sensitive resource; or in an entirely self-contained washout system. The permittee shall

clearly flag off and designate areas to be used for washing and conduct such activities only in

these areas. The permittee shall direct all wash water into a container or pit designed such that no

overflows can occur during rainfall or after snowmelt.

In addition, dumping of liquid waste in storm sewers is prohibited. At least once per week, the

permittee must inspect any containers or pits used for washout to ensure structural integrity,

adequate holding capacity, and to check for leaks or overflows. If there are signs of leaks, holes

or overflows in the containers or pits that could lead to a discharge, the permittee shall repair

them prior to further use. For concrete washout areas, the permittee shall remove hardened

concrete waste whenever the hardened concrete has accumulated to a height of ½ of the

container or pit or as necessary to avoid overflows.

3.3.5 Waste Disposal

Good housekeeping practices shall be implemented to minimize the discharge of litter, debris,

building materials, hardened concrete waste, or similar materials to waters of the State. The

contractor will be responsible for ensuring the areas are maintained properly.

3.3.6 Secondary Containment

All chemical and petroleum product containers stored on the Site (excluding those contained

within vehicles and equipment) shall be provided with impermeable containment which will hold

at least 110% of the volume of the largest container, or 10% of the total volume of all containers

in the area, whichever is larger, without overflow from the containment area. All chemicals and

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their containers shall be stored under a roofed area except for those chemicals stored in

containers of 100 gallon capacity or more, in which case a roof is not required. Double-walled

tanks satisfy this requirement.

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4. POST CONSTRUCTION STORMWATER MANAGEMENT

Post-construction stormwater management will be performed in a manner consistent with the

requirements of the General Permit for the Discharge of Stormwater Associated with Industrial

Activity. Pratt & Whitney Middletown is registered and maintains a Stormwater Pollution

Prevention Plan (SWPPP) consistent with the requirements of the general permit.

The proposed excavations will be returned to current grade; no change in the drainage areas is

anticipated. Although grading will change within the footprint of SWMU-6 and SWMU-14,

both solid waste management units will continue to discharge to Dart Brook within Drainage

Area 007. There is not anticipated increase in runoff velocity or sediment or floatable loading to

receiving watercourses. Therefore, velocity dissipation devices or sediment and floatable

removal controls are not warranted.

If velocity dissipation devices or sediment and floatable removal controls are deemed necessary

during or after construction, calculations supporting these designs will be added to the Plan and

the Plan will be updated accordingly.

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5. INSPECTIONS, MONITORING, MAINTENANCE AND RECORDS

This section details the minimum soil erosion and sediment control inspections to be performed

during and following construction. The Site contractor will be responsible for maintenance and

integrity of soil erosion and sediment controls during the entire duration of the construction

activities. The contractor shall also be responsible for completing the inspections noted below.

The following is a description of the inspection procedures to be followed at the Site. These

requirements must be met for inspections.

• Inspections by a Professional Engineer will be implemented in accordance with the General

Permit for the Discharge of Stormwater and Dewatering Wastewaters Associated with

Construction. Within the first 30 days following commencement of the construction activity

on the site, the permittee shall contact a Professional Engineer to inspect the Site. The Site

shall be inspected at least once and no more than three times during the first 90 days to

confirm compliance with the general permit and proper initial implementation of all controls

measures designated in the SWPCP for the Site for the initial phase of construction.

• The permittee shall maintain a rain gauge on-site to document rainfall amounts. Qualified

personnel shall inspect disturbed areas of the construction activity that have not been finally

stabilized; all erosion and sedimentation control measures; all structural control measures;

soil stockpile areas; washout areas and locations where vehicles enter or exit the Site at least

once every seven calendar days or within 24 hours of the end of a storm that generates a

discharge. See Section 5.4 for details on post-rainfall inspection instructions. Where areas

have been temporarily or finally stabilized, such inspection shall be conducted at least once

every month for three months.

• On a weekly basis, disturbed areas and areas used for storage of materials that are exposed to

precipitation shall be inspected for evidence of, or the potential for, soil erosion and

sedimentation. Erosion and sediment control measures shall be observed to ensure that they

are operating correctly. Where discharge locations or points are assessable, they shall be

inspected to ascertain whether erosion control measures are effective in preventing

significant impacts to receiving waters. Locations where vehicles enter or exit the Site shall

be inspected for evidence of off- Site sediment tracking.

• After each inspection, a Weekly Inspection Log will be filled out and shall summarize: the

scope of the inspection; name(s) and qualifications of personnel making the inspection; the

date(s) of the inspection; weather conditions including precipitation information; major

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observations relating to erosion and sediment controls and the implementation of this

SWPCP; a description of the stormwater discharge(s) from the Site; and any water quality

monitoring performed during the inspection. The report shall be signed by the permittee or

his/her authorized representative in accordance with the Section 7 of this SWPCP. The form

shall be retained as part of this Plan. The Weekly Inspection Log is attached as Appendix C.

• Based on the results of the inspection, the description of potential sources and pollution

prevention measures identified in this Plan shall be revised as appropriate as soon as

practicable after such inspection. Non-engineered corrective actions shall be implemented on

Site within 24 hours and incorporated into a revised Plan within three (3) calendar days of the

date of inspection. Engineered corrective actions shall be implemented on Site within seven

(7) days and incorporated into a revised Plan within ten (10) days of the date of inspection.

This Plan shall be revised and the Site controls updated in accordance with sound

engineering practices, the Guidelines, and Section 5(b)(4) of the general permit. During the

period in which any corrective actions are being developed and have not yet been fully

implemented, interim measures shall be implemented to minimize the potential for the

discharge of pollutants from the Site.

• A report summarizing the scope of the inspection, name(s) and qualifications of personnel

making the inspection, the date(s) of the inspection, major observations relating to the

implementation of this plan, and actions taken shall be made and retained as part of the

SWPCP for at least five years after the date of inspection. The report shall be signed by the

permittee or his/her authorized representative in accordance with the requirements of Section

7 of this SWPCP.

• This Plan shall be amended whenever there is a change in contractors or subcontractors at the

Site, or a change in design, construction, operation, or maintenance at the Site which has the

potential for the discharge of pollutants to the waters of the state and which has not otherwise

been addressed in this Plan.

• This Plan shall also be modified if the actions required by the Plan fail to prevent pollution.

• Inspectors from the DEEP and the Town of Middletown may inspect the Site for compliance

with this general permit at any time construction activities are ongoing and upon completion

of construction activities to verify the final stabilization of the Site and/or the installation of

post-construction stormwater management measures pursuant to Section 6(a) of the general

permit.

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5.1 Weekly Inspections

Qualified personnel shall conduct weekly inspections. In general, these inspections shall be

completed until final stabilization has been achieved and shall address disturbed areas that have

not been stabilized, structural control measurers, vehicle exit and entrance areas, and material

storage areas.

Items to be inspected include (at a minimum):

1. Walk open excavation areas and soil stockpile areas on the Site to determine if there are any

disturbed areas not protected by soil erosion or sediment control measures.

2. Check open excavation areas and soil stockpile areas on the Site for wastes resulting from

equipment maintenance, personnel, and construction activities – these wastes will not be

discarded on the Site.

3. Soil erosion and sediment controls located throughout the Site at open excavation areas and

soil stockpile areas, including hay bales, and silt fencing.

4. Accumulated silt and sediment will be removed from silt fences and hay bales when silt

exceeds 1/3 the height of the control.

5. Disturbed soil areas – check for erosion rills; check protective dams and silt barriers.

6. Restored landscaped areas, mulch, mats, checks and siltation barriers – check measures

necessary to enhance growth of stabilizing vegetation; check mulch; check barriers.

7. Observe the entrance and exit point from the construction areas. Check for signs of excessive

off-Site sediment and/or soil tracking.

8. The contractor parking and staging areas shall be maintained.

9. Anti-tracking pads shall be replaced when void spaces are full or structures are breeched, as

applicable.

10. Supplies - a minimum of 100 feet of silt fence shall be stored at the Site for emergency use.

11. Dust Suppression – a means of dust suppression (water or calcium chloride) must be

maintained on-site.

12. Any containers or pits used for washout for structural integrity, adequate holding capacity

and signs of leaks or overflows.

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5.2 Post-Rainfall Inspections

In addition to those inspections listed above, qualified personnel shall perform an inspection of

areas identified for weekly inspection within 24 hours of the end of a storm that generates a

discharge. For storms that end on a weekend, holiday or other time after which normal working

hours will not commence within 24 hours, an inspection is required within 24 hours only for

storms that equal or exceed 0.5 inches. For storms of less than 0.5 inches, an inspection shall

occur immediately upon the start of the subsequent normal working hours.

These inspections need only be conducted until the area has been temporarily or finally

stabilized, such inspection shall then be conducted at least once every month for three months.

5.3 Post Construction Inspections

Qualified personnel shall perform post-construction inspections based on the above criteria until

stabilization of the entire Site is documented. Post construction inspections shall, at a minimum,

be conducted at least monthly for a three-month period after temporary or final stabilization has

been achieved.

5.4 Monitoring

Stormwater discharge samples will be collected for turbidity analysis in accordance with 40

Code of Federal Regulations (CFR) Part 136 at least once every month when there is a discharge

of stormwater from the Site during construction, and until final stabilization of the drainage area

associated with each discharge point is achieved. Stormwater samples will be collected from

sampling points SW002, SW004, and SW007 shown on Drawing 1. All sampling locations will

be clearly marked with a flag, stake and/or other visible marker. Sampling points SW002 and

SW004 are representative sample location for the Site since the planned remediation work

conducted in areas outside the areas of these sampling points is similar in nature. Sampling point

SW007 will be used to monitor stormwater discharge in the area of SWMU-6 and SWMU-14

since the planned remediation work in the two areas differ from the work in other locations.

Samples are only required to be collected during normal working hours (Monday through Friday,

between the hours of 6:00 am and 6:00 pm). Sampling may be temporarily suspended any time

conditions exist that may reasonably pose a threat to the safety of the person taking the sample.

If sampling is discontinued due to the end of normal working hours, the permittee shall resume

sampling the following morning or the morning of the next working day following a weekend or

holiday, as long as the discharge continues. If there is no discharge, no sample shall be

collected.

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All samples shall be collected from discharges resulting from a storm event that occurs at least

24 hours after any previous storm event generating a stormwater discharge. Any sample

containing snow or ice melt must be identified on the Stormwater Monitoring Report (SMR)

form attached as Appendix E. Sampling of snow or ice melt in the absence of a storm event is

not a valid sample. Samples shall be grab samples taken at least three separate times during a

storm event and shall be representative of the flow and characteristics of the discharge. The first

sample shall be taken manually within the first hour of stormwater discharge from the Site. If the

discharge begins outside of normal working hours, the first sample shall be collected at the start

of normal working hours. If there is no discharge, no sample shall be collected.

The stormwater discharge turbidity value for each sampling point shall be determined by taking

the average of the turbidity values of all samples taken at that sampling point during a given

storm. If the defined sampling point or points do not manifest into a discharge, sampling cannot

be performed and the field conditions shall be recorded indicating such condition. Monitoring

results and observations for each outfall shall be recorded on the SMR form provided as

Appendix E.

5.5 Maintenance

Maintenance will be necessary throughout the construction project to mitigate potential soil

erosion and sedimentation. Maintenance activities shall be performed on aspects of the work as

needed to maintain the soil erosion and sedimentation controls as defined herein and as added

throughout the project due to needs as they arise. Maintenance will entail replacing or repairing

the controls designated in this Plan to their original function. Maintenance may also include the

installation of additional erosion control measures as needed to adequately mitigate potentially

erosion or sedimentation.

At a minimum, the following controls will require regular maintenance:

• Slopes - Slope erosion control blankets and vegetation shall be inspected twice a year and

after significant rainfall events. Additional maintenance, beyond schedule maintenance,

may be required based upon inspections. Any rills or channeling shall be repaired

immediately. Sediment deposits, trash and debris shall be removed to a location off-site

and disposed of in an environmentally acceptable manner.

• Anti-tracking controls including the cobble pad and paved roadway providing Site access.

• Silt fencing and hay bales located throughout the Site. Replacement may be required if

hay bales become loose or silt fence torn.

• Landscaped areas, mulch, checks and siltation barriers throughout the Site. It is

anticipated that the majority of the Site proper will be finished with woodchips, mulch or

5-6

other Site manufactured stabilization product. Other areas will be seeded and stabilized

via vegetation.

5.6 Reporting and Record Retention

Upon the completion of a weekly, post rainfall, or post construction inspection, a brief report

shall be prepared detailing the scope of the inspection, the name of the inspector(s), the date of

the inspection, observations effecting the SWPCP, and corrective actions required to ensure

proper operation of erosion and pollution control measures. Qualified personnel must sign this

report. Copies of these reports must be retained for a period five years from the date of

construction completion.

Copies of blank inspection report forms identified above are included in Appendix C. The

completed records of inspection must be maintained as part of the Plan for a period of at least

five years.

Upon learning of a violation of a condition of this general permit, a contractor shall immediately

take reasonable action to determine the cause of such violation, correct and mitigate the results of

such violation, prevent further such violation, and report in writing such violation and such

corrective action to the commissioner within five days of the contractor’s learning of such

violation. Such information shall be filed in accordance with the certification requirements

prescribed in Section 7 of this SWPCP.

If the permittee becomes aware of a change in any information in any material submitted

pursuant to this general permit, or becomes aware that any such information is inaccurate or

misleading or that any relevant information has been omitted, permittee shall correct the

inaccurate or misleading information or supply the omitted information in writing to the

commissioner within fifteen (15) days. Such information shall be filed in accordance with the

certification requirements prescribed in Section 7 of this SWPCP.

The Site contractor shall retain an updated copy of this Plan at the Site from the date construction

is initiated at the Site until the date construction at the Site is completed.

Upon completion of construction for areas authorized by the General Permit for the Discharge of

Stormwater Associated with Industrial Activity, this Plan shall be kept as an appendix to the

SWPPP for a period of at least three years from the date of completion of construction.

5.6.1 Stormwater Monitoring Reports

5-7

Within thirty (30) days following the end of each month, permittees shall enter the stormwater

sampling result(s) submit the SMR form in accordance with the general permit.

If there was no discharge during any given monitoring period, the permittee shall submit the

form as required with the words “no discharge” entered in place of the monitoring results. If the

permittee monitors any discharge more frequently than required by this general permit, the

results of this monitoring shall be included in additional SMRs for the month in which the

samples were collected. If sampling protocols are modified due to the limitations of normal

working hours or unsafe conditions, a description of and reason for the modifications shall be

included with the SMR. If the permittee samples a discharge that is representative of two or more

substantially identical discharge points, the permittee shall include the names or locations of the

other discharge points.

6-1

6. TERMINATION REQUIREMENTS

At the completion of the construction project, a Notice of Termination must be filed with the

commissioner. A copy of the Notice of Termination is attached as Appendix F. The project shall

be considered complete after all post-construction measures are installed, cleaned and

functioning and the Site has been stabilized for at least three months following the cessation of

construction activities. The Site will be considered stabilized when there is no active erosion or

sedimentation present and no disturbed areas remain exposed for all phases.

Once the Site has been stabilized for at least three months, the registrant shall have the Site

inspected by a qualified inspector to confirm final stabilization. The registrant shall indicate

compliance with this requirement on the Notice of Termination form.

7-1

7. CERTIFICATIONS

This section describes the necessary certifications for this Plan.

7.1 Document Certification

Any document, including but not limited to any notice, information or report, which is submitted

to the commissioner under this general permit shall be signed by the permittee, or a duly

authorized representative of the permittee, and by the individual or individuals responsible for

actually preparing such document, each of whom shall certify in writing as follows:

“I have personally examined and am familiar with the information submitted in this document

and all attachments thereto, and I certify that, based on reasonable investigation, including my

inquiry of those individuals responsible for obtaining the information, the submitted information

is true, accurate and complete to the best of my knowledge and belief. I understand that a false

statement made in this document or its attachments may be punishable as a criminal offense, in

accordance with Section 22a-6 of the Connecticut General Statutes, pursuant to Section 53a-

157b of the Connecticut General Statutes, and in accordance with any other applicable statute.”

7.2 Contractor Certifications

Loureiro is the Contract Manager and will oversee the subcontractors to be chosen. Each

individual employee of any contractor performing duties related to stormwater, and soil erosion

and sediment control as part of the Site remediation project must sign the following certification.

"I certify under penalty of the law that I have read and understand the terms and conditions of

the General Permit for the Discharge of Stormwater Associated with Construction Activities. I

understand that as a contractor or subcontractor at the site, I am covered by this general permit,

and must comply with the terms and conditions of this general permit, including but not limited

to the requirements of the Stormwater Pollution Control Plan prepared for the site."

The certification shall include the name and title of the person providing the signature; the name,

address and telephone number of the contracting firm; the name and address for the Site; and the

date the certification is made. A blank certification statement to be signed by each individual

employee of any contractor performing duties related to stormwater, and soil erosion and

sediment control as part of the Site remediation project is included as Appendix D to this

SWPCP.

FIGURES

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GENERAL PERMIT REGISTRATION FORM FOR THE DISCHARGE OF STORMWATER

PRATT & WHITNEY, MIDDLETOWN, CONNECTICUTAND DEWATERING WASTEWATERS FROM CONSTRUCTION ACTIVITIES

ATTACHMENT A

FIGURE 1

DRAWINGS

B150-PRA-25:

ELECTRICAL SUBSTATION

ECM-PRA-6:

FORMER SAND

AND GRAVEL PITS

B440-PRA-30:

FORMER TEST CELL BLAST DOOR

BUILDING 10

BUILDING 110

BUILDING 150

WASTE TREATMENTBUILDING 330

BUILDING 220

BUILDING 450

BUILDING 440

ECMLANDFILL

UNDEVELOPED

BUILDING 410

BUILDING 330FORMER

BULK FUELFARM

B450-PRA-7A:

FORMER OUTDOOR STORAGE AREA EAST

B450-PRA-8A:

ABOVE GROUND STEAM LINES

B330-PRA-41A:

WATER TANK #283

B330-PRA-20:

FORMER 20,000 GAL. JET FUEL UST AREA

B330-PRA-41B:

WATER TANK #320

B330-PRA-10:

FORMER TRANSFORMER

WEST OF BUILDING 340

B330-PRA-47:

POLLUTED FILL

WEST OF BUILDINGS

290 & 295

B330-PRA-27:

BUILDING 330

EXHAUST STACKS

B330-PRA-6:

FORMER BUILDING 310

TRANSFORMER

B330-PRA-19:

FORMER BUILDING 310

BULK FUEL STORAGE AREA

UND-PRA-1

B330-PRA-42A:

ABOVE-GROUND STEAM LINES

B440-PRA-21:

EXTERIOR AREA

B220-PRA-40:

FORMER RADIATOR LABORATORY

(BUILDING 270)

B330-PRA-8 AND 9:

FORMER STORAGE TANKS/

CATCH BASINS WITH

CONTAINMENT BERMS

B410-PRA-1:

SWMU #6

B440-PRA-29:

BUILDING EXTERIOR PERIMETER

B410-PRA-2:

SWMU #14

B410-PRA-13:

FILL AREA

B330-PRA-42B:


B330-PRA-42C:


B450-PRA-8B:


B450-PRA-9B:

FILL AREA EAST OF BUILDING 450

B440-PRA-28:

STEAM LINES

SAMPLE

POINT

SW005

SAMPLE

POINT

SW006

SAMPLE

POINT

SW007

SAMPLE

POINT

SW008

SAMPLE

POINT

SW002

SAMPLE

POINT

SW003

SAMPLE

POINT

SW004

SAMPLE

POINT

SW001

B440-PRA-28:

STEAM LINES

BUILDING 96

P&W Proprietary - “These documents are the property of United Technologies Corporation (UTC). You may not possess, use,copy or disclose these documents or any information in them, for any purpose, including without limitation to design,manufacture, or repair parts, or obtain FAA or other government approval to do so, without UTC's express written permission.Neither receipt nor possession of these documents alone, from any source, constitutes such permission. Possession, use,copying or disclosure by anyone without UTC's express written permission is not authorized and may result in criminal and/orcivil liability.” This document contains no technical data subject to the EAR or the ITAR.

LEGEND

WETLAND

WATERBODY/MARSH AREA

EXCAVATION AREA REMEDIATIONPROPERTY LINE (APPROX.)

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SHEETNO.

NO. OFSHEETS

SC

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PR

.

LoureiroEngineering · Construction · EH&S · Energy · Waste

Loureiro Engineering Associates, Inc.

100 N

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SOLID WASTE MANAGEMENT UNITS TO BE CAPPED

DRAINAGE DIVIDE

B150-PRA-25:

ELECTRICAL SUBSTATION

ECM-PRA-6:

FORMER SAND

AND GRAVEL PITS

B440-PRA-30:

FORMER TEST CELL BLAST DOOR

BUILDING 10

BUILDING 110

BUILDING 150

WASTE TREATMENTBUILDING 330

BUILDING 220

BUILDING 450

BUILDING 440

ECMLANDFILL

UNDEVELOPED

BUILDING 410

BUILDING 330FORMER

BULK FUELFARM

B450-PRA-7A:

FORMER OUTDOOR STORAGE AREA EAST

B450-PRA-8A:


B330-PRA-41A:

WATER TANK #283

B330-PRA-20:

FORMER 20,000 GAL. JET FUEL UST AREA

B330-PRA-41B:

WATER TANK #320

B330-PRA-10:

FORMER TRANSFORMER

WEST OF BUILDING 340

B330-PRA-47:

POLLUTED FILL

WEST OF BUILDINGS

290 & 295

B330-PRA-27:

BUILDING 330

EXHAUST STACKS

B330-PRA-6:

FORMER BUILDING 310

TRANSFORMER

B330-PRA-19:

FORMER BUILDING 310

BULK FUEL STORAGE AREA

UND-PRA-1

B330-PRA-42A:


B440-PRA-21:

EXTERIOR AREA

B220-PRA-40:

FORMER RADIATOR LABORATORY

(BUILDING 270)

B330-PRA-8 AND 9:

FORMER STORAGE TANKS/

CATCH BASINS WITH

CONTAINMENT BERMS

B410-PRA-1:

SWMU #6

B440-PRA-29:

BUILDING EXTERIOR PERIMETER

B410-PRA-2:

SWMU #14

B410-PRA-13:

FILL AREA

B330-PRA-42B:


B330-PRA-42C:


B450-PRA-8B:


B450-PRA-9B:

FILL AREA EAST OF BUILDING 450

B440-PRA-28:

STEAM LINES

B440-PRA-28:

STEAM LINES

LEGEND


PROPERTY LINE (APPROX.)

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100 N

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WETLAND


EXCAVATION AREA REMEDIATION

SOLID WASTE MANAGEMENT UNITS TO BE CAPPED

B410-PRA-1:

SWMU #6

115.0 x

SWALE AND 4" ∅ PERFORATED

UNDERDRAIN WITH FILTER FABRIC

@ 1.0%±

4" ∅ PERFORATED

UNDERDRAIN WITH

FILTER FABRIC TYP.

@ 1.0%±

5' x 30' x 1' THICK

MODIFIED RIPRAP

LEVEL SPREADER

(END OF SWALE)

20' x 40' x 1' THICK

MODIFIED RIPRAP

APRON (END OF SWALE)

4" ∅ PERFORATED

UNDERDRAIN WITH

FILTER FABRIC

@ 1.0%

5

2

GEOWEB SLOPE COVER

118

120

1

3

0

1

3

2

134

130

128

126

124

122

120

118

116

1

3

6

1

3

6

1

3

4

1

3

4

1

3

2

130

128

126

124

1

2

21

2

0

1

1

6

1

1

4

1

1

2

1

1

0

1

0

8

1

0

6

1

0

4

1

0

2

1

0

0

98

M

A

X

.

4

H

:

1

V

98

1

0

0

1

0

2

1

0

4

1

0

6

1

0

8

1

1

0

1

1

2

1

1

4

116

115.5 x

115.5 x

115

1

1

8

120

130

1

2

2

1

2

4

1

2

6

1

3

6

1

3

4

1

3

2

1

3

0

1

2

8

M

A

X

.

3

H

:

1

V

1

3

4

1

3

8

130

132

134

1

3

2

1

1

4

1

1

6

1

1

0

1

0

0

1

1

2

1

0

2

1

0

4

1

0

6

1

0

8

9

8

1

4

0

5

0

4

8

5

8

5

6

5

4

4

2

4

4

4

6

3

6

3

8

4

0

B410-PRA-13

FILL AREA

(SEE DWG. C-17)

CLEAR AND GRUB AREA

AS REQUIRED FOR NEW WORK

CLEAR AND

GRUB AREA

AS REQUIRED

FOR EXCAVATION

DRAWING

DR

AW

N B

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AP

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100 N

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Phone: 860-747-6181 · Fax: 860-747-8822

An Em

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SITE

LEGEND

CHAIN LINK FENCE

TREELINE

RAILROAD

PROPERTY BOUNDARY

TOPOGRAPHIC CONTOURS (2' INTERVAL)

BUILDING/STRUCTURE

ROAD


POTENTIAL RELEASE AREAPRA

ACRONYMS

SOIL EROSION & SEDIMENT CONTROLSSE&SC

SOLID WASTE MANAGEMENT UNITSWMU

TOXIC SUBSTANCE CONTROL ACTTSCA

FEET BELOW GRADEFBG

100-YEAR FLOOD LIMIT LINE


·

·

B410-PRA-1 (SWMU 6)

121

LIMITS OF PROPOSED ENGINEERED CONTROL

PROPOSED CONTOUR (2 FOOT INTERVAL)

STATE & FEDERAL WETLAND BOUNDARY (SRC)

PROPOSED SE&SC SILT FENCING

PROPOSED GEOWEB SLOPE COVER

STUDY AREA BOUNDARY

PROPOSED EXCAVATION AREA

WETLAND 100-FOOT BOUNDARY (SRC)

GENERAL NOTES:

1. All excavations must be performed in accordance with the contract specifications, the 2013

Remedial Action Plan (RAP) and the to-be-completed in 2015 TSCA RAWP for PCB

contaminated soils. The specifications and requirement of the RAWP are part of the contract

documents.

2. In general, soil excavated from the site will contain contaminants at concentrations exceeded

the Connecticut Remediation Standard Regulations (RSR's).

3. Areas identified as B220-PRA-40, B330-PRA-8 & 9, B330-PRA-42A/B/C, B440-PRA-21,

B440-PRA-29, B440-PRA-30 and B450-PRA-9B contain PCBs.

4. All PCBs at concentrations greater than or equal to 1 mg/kg and less than 50 mg/kg must be

segregated and stockpiled onsite for proper offsite disposal at a Subtitle D landfill.

5. Remediation of PCB areas identified as B330-PRA-8 & 9, B330-PRA-42A/B/C, B440-PRA-21,

B440-PRA-29 and B440-PRA-30 must be completed in accordance with an EPA approved PCB

RAWP.

6. Refer to contract specifications, RAWPs, and Soil Management Plan (SMP) for soil handling

requirements.

7. The owner's construction manager shall test the soil excavation onsite and provide the

contractor with analytical results for disposal authorization.

8. Remedial excavation limits may increase depending on post-excavation confirmatory sample

analytical results collected by the owner's construction manager.

9. Underground and aboveground features have been compiled, in part, based upon information

furnished by others. This information is considered to be approximate and Loureiro

Engineering Associates, Inc. does not take responsibility for subsequent errors or omissions

that may have been incorporated into this plan as a result. The contractor is responsible for

locating all aboveground and belowground features and utilities prior to construction and

utilizing the “Call Before You Dig” phone number (811), and private utility markout contractor.

10. The RAWPs require restrictions on stockpiling; refer to the Contract Specifications for further

information.

11.Contractor shall coordinate placement of work zones and decontamination pad with owner's

construction manager prior to start of work.

12.Saw cut pavement within limits of remedial excavation (as applicable).

B410-PRA-2:

SWMU #14

ENGINEERED CONTROL

5' x 30' x 1' THICK

MODIFIED RIPRAP

LEVEL SPREADER

(END OF SWALE)

5

2

x

5

9

.

6

4" ∅ PERFORATED

UNDERDRAIN WITH

FILTER FABRIC

TYPICAL @ 1.0%± MIN.

5' x 30' x 1' THICK

MODIFIED RIPRAP

LEVEL SPREADER

4" ∅ PERFORATED

UNDERDRAIN WITH

FILTER FABRIC


GEOWEB SLOPE COVER

4" ∅ PERFORATED

UNDERDRAIN WITH

FILTER FABRIC


4" ∅ PERFORATED

UNDERDRAIN WITH

FILTER FABRIC


EXCAVATION TO 4 FBG

EXCAVATION TO 2 FBG

4" ∅ PERFORATED

UNDERDRAIN WITH

FILTER FABRIC


116

1

1

4

1

1

0

1

0

0

1

1

2

1

0

2

1

0

4

1

0

6

1

0

8

9

8

5

6

5

0

5

2

5

4

4

8

4

6

4

4

5

4

5

2

5

0

4

8

4

2

4

4

4

6

4

2

4

0

4

0

4

0

4

2

4

4

4

4

4

6

4

8

5

0

5

2

5

4

5

6

5

8

5

6

5

4

5

2

5

4

5

0

4

8

5

8

5

6

5

4

4

2

4

4

4

6

3

6

3

8

4

0

4

0

5

0

4

4

4

64

2

4

8

4

0

5

2

5

4

5

6

4

0

3

6

3

8

5

8

B410-PRA-13

FILL AREA

(SEE DWG. C-17)

CLEAR AND

GRUB AREA

AS REQUIRED

FOR NEW WORK

TEMPORARY ACCESS ROAD

APPROXIMATE LIMIT

OF 2015 LANDFILL WORK

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100 N

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Phone: 860-747-6181 · Fax: 860-747-8822

An Em

ployee O

wned Com

pany · w

ww

.Loureiro.com

Lou

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oEngineering ·

Construction ·

EH

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Energy ·

Waste

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·

·

SITE

LEGEND

CHAIN LINK FENCE

TREELINE

RAILROAD

PROPERTY BOUNDARY

TOPOGRAPHIC CONTOURS (2' INTERVAL)

BUILDING/STRUCTURE

ROAD


POTENTIAL RELEASE AREAPRA

ACRONYMS

SOIL EROSION & SEDIMENT CONTROLSSE&SC

SOLID WASTE MANAGEMENT UNITSWMU

TOXIC SUBSTANCE CONTROL ACTTSCA

FEET BELOW GRADEFBG

100-YEAR FLOOD LIMIT LINE

B410-PRA-2 (SWMU 14)

121

LIMITS OF PROPOSED ENGINEERED CONTROL

PROPOSED CONTOUR (2 FOOT INTERVAL)

STATE & FEDERAL WETLAND BOUNDARY (SRC)

PROPOSED SE&SC SILT FENCING

PROPOSED GEOWEB SLOPE COVER

STUDY AREA BOUNDARY

PROPOSED EXCAVATION AREA

WETLAND 100-FOOT BOUNDARY (SRC)

GENERAL NOTES:

1. All excavations must be performed in accordance with the contract specifications, the 2013

Remedial Action Plan (RAP) and the to-be-completed in 2015 TSCA RAWP for PCB

contaminated soils. The specifications and requirement of the RAWP are part of the contract

documents.

2. In general, soil excavated from the site will contain contaminants at concentrations exceeded

the Connecticut Remediation Standard Regulations (RSR's).

3. Areas identified as B220-PRA-40, B330-PRA-8 & 9, B330-PRA-42A/B/C, B440-PRA-21,

B440-PRA-29, B440-PRA-30 and B450-PRA-9B contain PCBs.

4. All PCBs at concentrations greater than or equal to 1 mg/kg and less than 50 mg/kg must be

segregated and stockpiled onsite for proper offsite disposal at a Subtitle D landfill.

5. Remediation of PCB areas identified as B330-PRA-8 & 9, B330-PRA-42A/B/C, B440-PRA-21,

B440-PRA-29 and B440-PRA-30 must be completed in accordance with an EPA approved PCB

RAWP.

6. Refer to contract specifications, RAWPs, and Soil Management Plan (SMP) for soil handling

requirements.

7. The owner's construction manager shall test the soil excavation onsite and provide the

contractor with analytical results for disposal authorization.

8. Remedial excavation limits may increase depending on post-excavation confirmatory sample

analytical results collected by the owner's construction manager.

9. Underground and aboveground features have been compiled, in part, based upon information

furnished by others. This information is considered to be approximate and Loureiro

Engineering Associates, Inc. does not take responsibility for subsequent errors or omissions

that may have been incorporated into this plan as a result. The contractor is responsible for

locating all aboveground and belowground features and utilities prior to construction and

utilizing the “Call Before You Dig” phone number (811), and private utility markout contractor.

10. The RAWPs require restrictions on stockpiling; refer to the Contract Specifications for further

information.

11.Contractor shall coordinate placement of work zones and decontamination pad with owner's

construction manager prior to start of work.

12.Saw cut pavement within limits of remedial excavation (as applicable).

SEDIMENT CONTROLBAG "SILTSACK" OREQUAL

DUMP STRAP

DUMP STRAP1" REBAR FORBAG REMOVALFROM INLET

BAG DEPTH TOTOP OF PIPE

2 EACHDUMP STRAPS

EXPANSION RESTRAINT(1/4" NYLON ROPE,2" FLAT WASHERS)

WIDTHLENGTH

DE

PT

H

CB STYLE LENGTH

TYPE 1 CB

TYPE 1 CCI

USA G2

WIDTH DEPTH

24" 20" VARIES

29.5" 24"

32.5" 27.5"

VARIES

VARIES

NOTES:

1. THE DIMENSION CHART ABOVE IS FOR STANDARD CATCH BASINS AND INLETS ONLY. THE CONTRACTOR IS RESPONSIBLE FORPROVIDING THE CORRECT SIZE DEVICE FOR EACH INLET.

2. FOR NON-STANDARD CATCH BASINS AND INLETS, THE CONTRACTOR SHALL MEASURE DIMENSIONS IN THE FIELD AND ORDERTHE APPROPRIATE SIZE(S).

3. THE INLET SEDIMENT CONTROL DEVICE SHALL BE OF HIGH FLOW DESIGN (200 GAL/MIN/FT), AS PER THE MANUFACTURER'SSPECS.

4. THE SEDIMENT CONTROL DEVICE SHALL BE INSPECTED DAILY BY THE CONTRACTOR AND MAINTAINED A MINIMUM ONCE PERMONTH OR WITHIN THE 48 HOURS FOLLOWING A STORM EVENT. FILTER SHALL BE CLEANED IN A MANNER WHICH ENSURESTHAT ALL SEDIMENT REMAINS ON SITE.

5. SUBSTITUTION OF A SHEET OF FILTER FABRIC PLACED OVER THE OPENING OF THE INLET IS NOT APPROVED.

6. RECESSED CURB INLET CATCH BASINS MUST BE BLOCKED WHEN USING FILTER FABRIC INLET SACKS, SIZE OF FILTER INLETSACK TO BE DETERMINED BY MANUFACTURER.

7. THE FILTER SHALL BE REPLACED OR CLEANED WHEN THE BAG BECOMES HALF FULL.

8. SEE INLET PROTECTION NOTES STD. DETAIL E3.

BAG DETAIL

SCALE: NONE

INLET SEDIMENT CONTROL DEVICE (SILT SACK)

INSTALLATION DETAIL

NOTE:CATCH BASIN GRATES TO BE WRAPPED W/MARAFI 500 FILTER CLOTH OR APPROVEDEQUAL AND BULKHEADED WITH HAYBALES IMMEDIATELY PRIOR TO CONSTRUCTION.

SCALE: NONE

SEDIMENT BARRIER AT CATCH BASIN

HAYBALES W/STAKES

JOINTS OFHAYBALES TO BECLOSED TIGHT

FRAME AND GRATE

FINISH GRADE

SILT FENCE

WOOD POST

12"

6"

36"

FLOW

OR

SCALE: NONE

TYPICAL SEDIMENT BARRIER DETAIL

HAYBALESW/ 2-2" X 2" X 36"WOOD STAKES EACH

(POST TO BEANGLED 10°UPSLOPE FORSTABILITY &SELFCLEANING)

COMPACTEDBACKFILL

COMPACTEDBACKFILL

4" MIN.

HIGHER THAN POINTS BPOINTS A SHALL BE

B

BA

FLOW

SCALE: NONE

SWALE SEDIMENT BARRIER DETAIL

WEDGE LOOSE STRAWBETWEEN BALES TOCREATE A CONTINUOUSBARRIER

BOTTOMOF

DRAINAGECHANNEL

PLAN

SCALE: NONE

ANTI-TRACKING PAD DETAIL

FABRICFILTER

CT-DOT 2" STONE4" MIN. DEPTH

30' LONG x 12' WIDE

GRADEEXISTING

SECTION

(15 LF MIN.)

SECTION B-B

WIDTH VARIES

PLAN

FILTER FABRIC FENCEOR HAY/STRAW BALES

DIRECTIONOF FLOW

B ABOVE LOW POINTELEV. 1.0 FT.

IN SWALEB

SCALE: NONE

FILTER FABRIC OR HAY/STRAW BALESCHECK DAM

TYP. SPACING ASDIRECTED BY THE

ENGINEER (100 LF MAX.)

NOTE

CRUSHED STONE12" HIGH

FLOW

FLOW

SCALE: NONE

SEDIMENT CHECK & CHANNEL DISSIPATER

MAY BE FLATTENED FOR VEHICULAR TRAFFIC

STONE CHECK DAM -

#4 REBAR DRILLED INTOBITUMINOUS PAVINGOREXISTING GRADE

HAY BALESWITH EXPOSED TWINE

PROPOSEDEXCAVATED

CONTAMINATEDSOIL STOCKPILE

CONTAMINATED SOIL STOCKPILE

SCALE: NONE

SEDIMENTATION CONTROL DETAIL

#4 REBAR DRILLED INTOBITUMINOUS PAVINGOREXISTING GRADE

HAY BALESWITH EXPOSED TWINE

PROPOSEDEXCAVATED

CONTAMINATEDSOIL STOCKPILE

CLEAN SOIL STOCKPILE

SCALE: NONE


10 MIL HDPE

10 MIL HDPE

20 MIL HDPELINER

INTERMITTENTSAND BAGS

SCALE: NONE

EROSION CONTROL BLANKETDRAWING

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100 N

orthw

est D


Phone: 860-747-6181 · Fax: 860-747-8822

An Em

ployee O

wned Com

pany · w

ww

.Loureiro.com

Lou

reir

oEngineering ·

Construction ·

EH

&S ·

Energy ·

Waste

©L

ou

reiro

En

gin

ee

rin

g A

sso

cia

tes,

In

c.

All

rig

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re

serv

ed

20

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SCALE: NONE

ENTRANCE/EXIT SCHEMATICTYPICAL EXCLUSION ZONE

DECONTAMINATIONZONE OR NOWORK ZONE

EQUIPMENTDECONTAMINATION

ZONE WITHDECONTAMINATION

PAD

CONSTRUCTION FENCE

EXCLUSIONZONE SIGN

ALL VEHICLES EXITINGEXCLUSION ZONE MUST

PASS THROUGH EQUIPMENTDECONTAMINATION

EXCLUSIONZONE SIGN

EXCLUSION ZONE

SUPPORT ZONE

PERSONNELDECONTAMINATION

ZONE

ALL PERSONNEL EXITINGEXCLUSION ZONE MUST

PASS THROUGHPERSONNEL

DECONTAMINATION

X XX X X X

X XX X X X

EXCLUSIONZONE SIGN

EXCLUSIONZONE

ENTRANCE

X X

X X

EXCLUSIONZONE SIGN

WARNINGSOIL REMEDIATIONEXCLUSION ZONE

EXCLUSION ZONEFENCE SIGN DETAIL

12" MIN.

14" MIN.

NOTES:

· THE RAWP REQUIRES RESTRICTIONS ON STOCKPILES. REFER TO CONTRACT SPECIFICATIONS FOR FURTHER INFORMATION.

· MATERIAL AND SOIL MANAGEMENT STOCKPILE SITES TO BE DETERMINED BY THE OWNER.

· MATERIAL AND SOIL MANAGEMENT STOCKPILE HEIGHTS SHALL NOT EXCEED 35 FEET.

· RESTORE MATERIAL AND SOIL MANAGEMENT STOCKPILE SITES TO PRE-EXISTING PROJECT CONDITION.

MATERIALS STOCKPILE DETAIL

SCALE: NONE


TYPICAL MATERIALAND SOIL

MANAGEMENTSTOCKPILE

DIRECTIONOF RUN-OFFFLOW(TYPICAL)

SOILEROSION &

SEDIMENTATIONCONTROLBARRIER

(TYPICAL)

SCALE: NONE

EQUIPMENT DECONTAMINATION PAD DETAIL

2-INCH MINIMUMMOUNTABLE CURB

ASPHALT WITH 20 MIL. HDPELINER, 3-INCH MINIMUMTHICKNESS

CATCH BASIN WITHSEALED SUMP

6-INCH MINIMUMBARRIER CURB,BITUMINOUS ORCONCRETE

DIRECTION OFDRAINAGE

2-INCH MINIMUMMOUNTABLE CURB

A A'

SECTION A-A'PLAN

2.00% MINIMUM SLOPE

6-INCH MINIMUMBARRIER CURB,BITUMINOUS ORCONCRETE6"

NOTE: RESTORE EQUIPMENT DECONTAMINATION PAD SITE TO PRE-EXISTING PROJECT CONDITIONS.

Documents

STORMWATER POLLUTION CONTROL PLAN - Connecticut · Corporation / Pratt & Whitney Division (UTC/Pratt & Whitney) to prepare a Stormwater Pollution Control Plan (SWPCP) for its facility