ORANGE COUNTY WATER DISTRICT 18700 Ward Street Fountain … · 2020. 6. 2. · Orange County Water District Plant 2 Secondary Effluent Addendum No. 4 Pipeline Rehabilitation Page

Orange County Water District Plant 2 Secondary Effluent Addendum No. 4 Pipeline Rehabilitation Page 1 of 4

ORANGE COUNTY WATER DISTRICT 18700 Ward Street Fountain Valley, California 92708-6930 ADDENDUM NO. 4

TO PLANS, SPECIFICATIONS AND CONTRACT DOCUMENTS

FOR PLANT 2 SECONDARY EFFLUENT PIPELINE REHABILITATION PROJECT

CONTRACT NO. GWRS-2020-01

THE BIDDER SHALL EXECUTE THE CERTIFICATION AT THE END OF THIS ADDENDUM AND SHALL ATTACH IT TO THE PROPOSAL SUBMITTED. _________________________________________________________________ ORANGE COUNTY WATER DISTRICT June 2, 2020 Sandy Scott-Roberts, P.E. Date Project Manager THE BIDDER SHALL EXECUTE AND ATTACH THE FOLLOWING CERTIFICATION TO THE PROPOSAL. _________ ___ BIDDER'S CERTIFICATION I acknowledge receipt of the foregoing Addendum No. 4 to Contract No. GWRS-2020-01 and accept all conditions contained therein: Date: _____________________________________________________ Bidder: _____________________________________________________ By: _____________________________________________________


In accordance with Instructions to Bidders, we hereby issue Addendum No. 4, as indicated by the attached sheets. Acknowledge receipt of this Addendum by inserting its number and date on the Bid Form, Item 12, page P-8. This addendum forms a part of the Contract Documents and, with respect to the Contract Documents, this Addendum shall govern. The effort/cost of work included or excluded by this addendum shall be reflected in the Bidder’s Sealed Bid. A. MODIFICATIONS TO THE FRONT END DOCUMENTS

1. None

B. MODIFICATIONS TO THE TECHNICAL SPECIFICATIONS

1. Section 01140, “Work Restrictions” ADD: To 2-3.01 Sequence of Work item 5 the following, “The Contractor

shall remove all debris from STA 25+00 to STA 181+80. The Contractor shall not push debris beyond these limits in an effort to reduce the amount of debris to be removed. The Contractor shall include in the bid removal of 50 CY of debris.”

2. Section 02050, “Demolition and Salvage”

ADD: The following new section, “3-1.03. Abandonment. Where

existing abandoned pipelines are cut / demolished for execution of the work, the ends of the abandoned pipe shall be plugged. For PVC pipes the end caps shall be installed. For ductile iron, steel, and other material pipe, concrete plugs shall be installed to prevent soil from entering the abandoned pipeline after backfilling. The Contractor may propose an alternative means for positively capping / preventing soil from entering the abandoned pipe. The proposed method shall be submitted to the engineer for review and approval.”

3. Section 02636, “Fiberglass Reinforced Polymer Mortar Pipe” REPLACE: In Section 1-1 first paragraph “The existing RCP pipe shall be

rehabilitated with a nominal 62-inch outside diameter Fiberglass Reinforced Polymer Mortar (FRPM) Pipe for a sliplining installation.” to “The existing RCP pipe shall be rehabilitated with Fiberglass Reinforced Polymer Mortar (FRPM) Pipe having a


nominal 61-inch to 63-inch outside diameter for a sliplining installation.”

4. Section 02636, “Fiberglass Reinforced Polymer Mortar Pipe”

DELETE: In Section 1-4 first paragraph “D3262”.

5. Section 15062, “Steel Pipe” ADD: To end of 2-16. PROTECTIVE COATINGS AND LININGS the

following, “Mortar lining shall be provided on the steel section of pipe from approximately STA 70+25 to STA 81+10. This includes the steel tees and steel manway pipe up to the above grade access flange. The System 114 polyurethane lining shall be provided at all other locations including all manway risers extending from the FRP/HDPE tees and steel pipes serving the vacuum assemblies. In addition to the coating requirements in the Contract Document, the exposed steel pipe coating shall have UV inhibitor.

C. MODIFICATIONS TO THE PLANS (Note: Sheets not being re-issued for Addendum

unless noted)

1. Drawing No. G-06, General REPLACE: In Note 4 the following sentence, “Construction survey shall be by

OCWD.” with “Construction survey shall be by Contractor, and low density cellular concrete grout testing shall be performed by the Contractor.”

2. Drawing No. G-06, General ADD: The following note, “21. All nuts, bolts, anchor bolts, washers, and

hardware shall be 316 stainless steel regardless of indicated otherwise in the Contract Documents.”

3. Drawing No. G-06, General

ADD: The following note, “22. The ends of the abandoned utilities shall be

plugged. For PVC pipes the end caps shall be installed. For ductile iron, steel, and other pipe material concrete plugs shall be installed to prevent soil from entering the abandoned pipeline after backfilling. The Contractor may propose an alternative means for positively capping / preventing soil from entering the abandoned pipe. The proposed method shall be submitted for review and approval by the engineer.”


4. Drawing No. C-31 ADD: To end of Note 4 the following, “Vacuum assembly steel piping shall be

Polyurethane System 114 lined and coated. The exposed steel shall contain UV inhibitor.”

5. Drawing No. C-34

REPLACE: “1/4” CEMENT MORTAR LINING” with “POLYURETHANE LINING”.

6. Drawing No. C-35


7. Drawing No. C-37


D. OTHER

1. POTENTIAL BIDDER RFIs A log of RFIs submitted and responded to has been included in Attachment A. Please note that RFI responses which are in bold are responses that have been updated from previous addendum.

2. RE-ISSUED AND NEW DRAWINGS None.

3. RE-ISSUED AND NEW SPECIFICATIONS None.

4. FIGURES See Attachment B

Attachment A

Response to Bidders Request for

Information

1 Does all work need to be completed by July 1st, 2021?

No, however as a minimum the section of pipeline at the north and south ends of the alignment need to be completed by June 30, 2021 per section 01140 as modified by Addendum 2. Pipeline testing would be simplified should the entire pipeline be completed and tested as one section by June 30, 2020. The project must be completed within the 290 calendar days as presented in the Notice Inviting Bids section.

4/14/2020

2 If the 5% DBE goal is met do you still need to submit a GFE package?

Yes - the apparent lowest bidder is required to submit the complete good faith effort documentation summarizing its efforts in the solicitation and hiring process of DBE sub-contractors regardless of the DBE participation percentage. The good faith effort document shall be submitted to OCWD within 48 hours after the bid opening.

4/14/2020

3The bid date is the first day after the Memorial Day Holiday weekend. This will make it difficult to get supplier and subcontractor quotes and forms. The bid date should be moved away from the Holiday.

The bid date will be moved back in Addendum 1. 4/14/2020

4 Does the 30,000LF of slip line experience need to be within the last 5 years? No. 4/14/2020

5 Does the 30,000LF of slip line experience all need to be larger then 48”? Addendum 1 will change to 42-inches and greater. 4/14/2020

6Does this Executive Order affect this OCWD Project? https://www.whitehouse.gov/presidential-actions/executive-order-maximizing-use-american-made-goods-products-materials/

The cited Executive Order pertains to the Buy American Act and this act does not pertain to this project. However the American Iron and Steel provisions do apply to this project. 4/14/2020

7 What work can occur after July 1st, 2021? Any work that is required to complete the project except work within the very north and south areas as defined in section 01140. 4/14/2020

8 ETA for the addendum? By end of day on 4/23/2020 4/14/2020

United Pipeline 1 1

United Pipeline Systems (UPS) has been in business for over 30years and has fused & installed more than 20,000miles of HDPE conventional slipliners and compressed fit liners ranging in size from 2" to 52" in more than 30 countries worldwide. UPS meets the minimum 5 years' experience in sewer rehabilitation and has installed approximately 15,000-lf of 48-in diameter HDPE pipe or larger. Additionally, UPS has also fused & installed roughly 25,000-lf of 42-in diameter and in excess of 100,000-lf of 40-in diameter. Lastly, we will begin work on two 48-in diameter projects later this year. Please verify that United Pipeline Systems is an approved HDPE contractor for this project.

Currently minimum is 48-inch diameter however Addendum 1 will revise to 42-inch. 4/10/2020

Bubalo 1 1 Can a City of Los Angeles SBE certificate (see attached) count as DBE requirements on this project? Yes. This will count as DBE requirement. 4/19/2020

ReceivedResponseContractor

Orange County Water DistrictPlant 2 Secondary Effluent Pipeline Rehabilitation Project

Bid Period RFI Response Log-6/2/20

RFI No. Question#

QUESTIONS DURING ADDENDUM 1 PERIOD

PREBID MEETING QUESTIONS

Page 1 of 13




RFI No. Question#

Bubalo 1 2 Regarding the 30,000LF of Pipeline Rehabilitation experience, is this just slip lining work or can Cured In Place Process (CIPP) Pipeline Rehabilitation experience count? No. CIPP will not count towards rehabilitation work. 4/19/2020

Bubalo 1 3Regarding the 30,000LF of Pipeline Rehabilitation experience, what’s the minimum size of slip lining that can be counted towards this 30,000LF of Pipeline Rehabilitation experience?

Currently minimum is 48-inch diameter however Addendum 1 will revise to 42-inch. 4/19/2020

Bubalo 1 4 Regarding the three slip lining project experience, can we include a 42” FRP to Rehabilitate an existing 48” pipe project

Yes. Pipe diameter experience required will be revised from 48-inch to 42-inch in Addendum 1. 4/19/2020

Shea 1 1

Reference is made to Section 02626-1.5 Experience Requirements, which states the following“the installing contractor shall have a minimum of 5 years’ experience in sewer rehabilitation. Experience shall include installation of a minimum of 10,000 linear feet of sewer rehabilitationwith pipe of 48-inch diameter or larger utilizing the same slip lining trenchless technology sewerrehabilitation as is indicated in the bid. Personal experience of the construction manager withother construction companies may be substituted in lieu of the current company experience asapproved by the Engineer and Owner. Additional installation contractor requirements arelocated in the Front-End Documents.” JF Shea has rehabilitated/installed steel liners in over103,960 LF of large diameter welded steel pipelines with diameter ranges from 72” to 120”pipelines. Please consider revising this requirement to include weld steel slip lining experience orexperience slip lining pipelines 48-inch diameter or larger utilizing trenchless technology.

Yes. Welded steel pipe slip lining experience is considered comparable to fiberglass reinforced polymer mortar pipe slip lining installation experience. Section 02636 experience is specifically for the fiberglass reinforced polymer mortar pipe installing contractor. The size requirement of 48-inches is being reduced to 42-inches in Addendum 1.

4/17/2020

Shea 1 2

Reference is made to Section 02637-1.5 Experience Requirements, which states the following“the installing contractor shall have a minimum of 5 years’ experience in sewer rehabilitation. Experience shall include installation of a minimum of 30,000 linear feet of sewer rehabilitationwith pipe of 48-inch diameter or larger utilizing the same slip lining trenchless technology sewerrehabilitation as is indicated in the bid. Personal experience of the construction manager withother construction companies may be substituted in lieu of the current company experience asapproved by the Engineer and Owner. Additional installation contractor requirements arelocated in the Front-End Documents. ” JF Shea has rehabilitated/installed steel liners in over103,960 LF of large diameter welded steel pipelines with diameter ranges from 72” to 120”pipelines. Please consider revising this requirement to include weld steel slip lining experience orexperience slip lining pipelines 48-inch diameter or larger utilizing trenchless technology.

No. Welded steel pipe experience will not be added in this section. Section 02637 experience is specifically for the high density polyethylene pipe installing contractor. It is critical that the installing contractor have large diameter HDPE slip lining experience. The size requirement of 48-inches is being reduced to 42-inches in Addendum 1.

4/17/2020

Colich 1 1

Will OCWD please provide and Permits allowance bid item with an amount, from which the contractor may be reimbursed the actual permit(s) costs and/or fees? The permit costs and fees are unknown. Providing an allowance amount is fair to both the District and the contractor. Please consider.

An allowance will be added in Addendum 1. 4/21/2020

Colich 1 2

Regarding Special Provision 4.8 J, on PDF page 141 of the Specifications, can OCSD provide more of a specific date(s) and duration(s), or frequency, when their heavy equipment access and maintenance at the EJB will occur (requiring our presence to be prohibited in that area)? This information will aid in planning our work activities in the vicinity of the EFB.

OCSD access for EJB maintenance will occur from the Garfield Ave gate just north of EJB. As such there should be no interference in work between the project and OCSD maintenance activities.

4/21/2020

Page 2 of 13




RFI No. Question#

Colich 1 3Regarding Special Provision 4.9 K, on PDF page 141 of the Specifications, how many times this latest rainy season (10/15/19 to present) has the P2 Conveyance Pipeline been used as an emergency stormwater conveyance conduit by the OCSD?

From 10/15/2019 to present, the 66-inch was not used for emergency stormwater conveyance. Please note that per the cited specification that in the event the Contractor is asked to return the pipeline to service that the work will be monitored on a time and materials basis.

4/21/2020

Colich 1 4 Is disinfection of the slip-lined piping required? Reference to statement near the bottom of PDF page 155 (SP 23). No disinfection of the slip-lined pipeline will be required. 4/21/2020

Colich 2 1Will there be a continuous flow of water in the 66” RCP during the duration of the contract? If not, can OCWD or OCSD release a continuous flow to the 66” RCP (say 1 foot deep at least)? Can the released flow be cut off, if needed?

The Bid should be based on the assumption that there will be no flow through the 66" pipeline for the duration of the project particularly once the 66" is cut open for pipe insertion. The contractor awarded the contract may open discussion regarding the possibility of releasing flow for execution of the work however no guarantee is made that release of flow will be allowed. Please note that provisions managing for leakage from the valves and gates are still valid.

4/22/2020

Bubalo 2 1

Slip lining FRP pipe and pulling fused HDPE pipe are completely different pipeline rehabilitation technologies and require completely different types of experience. If the winning bidder only has HDPE pipeline (pulling fused pipe) rehabilitation Experience (with little or no Slip Lining FRP experience) but the project goes Slip Lining FRP, will they be awarded the contract with no Slip Lining FRP experience? Please clarify

Per the FRP and HDPE specifications sections and as amended in Addendum 2 qualified personnel with specific experience in FRP and HDPE is required. As such the winning bidder is required to have experienced staff for both the FRP and HDPE work.

4/24/2020

Bubalo 2 2

Slip lining FRP pipe and installing steel liners are completely different pipeline rehabilitation technologies and require completely different types of experience. If the winning bidder only has steel liner install rehabilitation Experience, (with little or no Slip Lining FRP or pulling HDPE pipe experience), will they be awarded the contract with no Slip Lining FRP or pulling HDPE experience? Installing steel liners is not Slip Lining. Please clarify

Same general response as previous question. For example, the General Contractor can have the steel lining experience but when working with the HDPE portions of the project, they must have the qualified staff members for that work per the experience specification section. See Addendum 2.

4/24/2020

Bubalo 2 3 Please clarify if the intent is to go Slip lining FRP pipe or pulling HDPE pipe on this project.

The intent is to receive two bids (Base Bid and Alternative Bid) from each contractor. One bid will be for FRP slipliing (Base Bid) and the other bid for HDPE sliplining (Alternative Bid). Provided all other requirements are met by the contractor, the contractor with the lowest FRP bid will be awarded the contract. After award, the Owner will evaluate and select the sliplining type and award the contract based on the slilling alternative selected.

4/24/2020

Shea 2 1

Reference is made to Contract Drawing No. C-36 “Temporary Connection Details” for the North and South connects, which shows a flex coupling with a short pipe piece with backer rod around the end of the pipe Section. Please provide details on what type of pipe material is required for the end section of pipe. Contract Drawing C-04 and C-19 both show the FRP/HDPE ending before the temporary connections.

Addendum 2 will change the temporary FRP/HDPE section of pipe to steel including the short pipe section which is inserted into the existing 66-inch pipe. 4/23/2020


Page 3 of 13




RFI No. Question#

Shea 2 2

Reference is made to Section 02636-3-4, which states “the existing sewer originally was a 66-inch inside diameter RCP; however, due to corrosion, the interior pipe surfaces has deteriorated and exposed rebar in some locations.” To keep jacking loads to a minimum, the pipe invert section will need to be reasonably smooth when jacking the new pipe. If we encounter rebar and deteriorated surfaces in the lower pipe quadrant it will need to be repaired prior to the installation of the new FRP/HDPE pipe. Currently, we have no way to accurately measure the limits of the necessary repair areas. Please consider adding a Unit Price Bid Item with an estimated quantity to the Contract Bid Schedule.

See the Supplemental Information including RedZone Robotics Laser Scanning Results and Summary of 2012 CCTV Inspection for more detailed information on pipe conditions and locations. In general the location of the deteriorated and exposed rebar areas are NOT within the lower quadrant of the pipe.

4/23/2020

Shea 3 1 On C-39, the valve enclosure is shown as being 1'-6" tall while on S-01 it is detailed as 5'- 0" tall with an 8' clearance. Please clarify. The enclosure shall be 1'-6" tall. See Addendum 2. 4/28/2020

Shea 3 2

On C-39, the valve enclosure is shown as having a 4" flanged base external to the enclosure measurements, while the drawing on S-01 shown this enclosure to have the same outside dimensions as the concrete support structure, which would not allow for a 4" flanged base plate. Please clarify.

The flange will be on the outside as shown on C-39. See Addendum 2. 4/28/2020

Shea 3 3

On C-39, Note 3 indicates the valve enclosure to be constructed of 1/4" thick material minimum. While S-01 depicts the enclosure as being steel framed with an external cladding. Is the Enclosure to be framed with 1/4" Cladding? If so, what metal shape and material is the frame to be manufactured from? If the intent is to have a framed enclosure with cladding, would there still be a need for a flanged skirt, since the frame would be carrying the load? Please provide a clearer detail of the valve enclosure.

The material will be changed to galvanized steel. See Addendum 2. 4/28/2020

Shea 3 4

Insurance Conditions, page IC-2, Item 5. Contractor’s Pollution Liability states in part, ‘optional: if project involves environmental hazards.’ Are there are any environmental hazards involved with this project, thus requiring the Contractor to provide Pollution Liability?

See Addendum 2. 4/28/2020

Shea 3 5

Insurance Conditions, page IC-2, paragraph 1 states, “If the Contractor maintains broader coverage and/or higher limits than the minimums shown above, the OCWD requires and shall be entitled to the broader coverage and/or higher limits maintained by Contractor.” However, current standard insurance policy language only provides limits as required by contract. Please advise if standard insurance language is acceptable.

The language to allow the Agency access to other broader coverage is the new recommended insurance requirements for public entities. 4/28/2020

Shea 4 1

Specification Sections 15102 Plug Valves, 15108 Vacuum Valves and Drawing C-39 note 5, all indicate extra valves and enclosure items are to be procured by the contractor and turned over to the owner. Since these items are not incorporated into the work, please indicated which Bid Item theses materials are to be included in.

Incorporate into Bid Item 6. 4/29/2020

NoCorr Products 1 1

What is the absolute minimum ID pipe that would be required in this project. Currently you have FRPM pipe with 60" and HDPE with 58" ID specified. Metric Pipe size DN1500 mm would offer a 57.5" ID. This is similar to the HDPE pipe that is allowed in this project. We would like to confirm that ASTM D3262 Metric Pipe Series DN1500 with 57.5" ID is allowed matching the HDPE pipe ID in this project.

58" is the minimum ID pipe size. Additional funding for the project was provided by SCE through savings by design based on the diameters included in the specifications and resulting annual pumping energy. A reduction in the ID would increase pumping energy and possibly eliminate funding by SCE.

4/28/2020

Page 4 of 13




RFI No. Question#

NoCorr Products 1 2

This lining could be done from only two 25' long access pits using FRPM pipe and if intermediate TEEs are required, they could be added after the lining is completed using 10' long access pits, minimizing the time and cost. We would like to confirm that OCWD is respective to cost saving options like this.

OCWD is receptive to cost saving options. Because of the longer duration of work at the two pits, the location f the two pits would need to be evaluated in terms of the impact to local residents.

4/28/2020

NoCorr Products 1 3Is there an incentive for the contractor to complete this project earlier than planned? What is the early completion incentive, if any?

No. 4/28/2020

NoCorr Products 1 4Could the contractors use 38 foot joints lengths on the straight sections and shorter lengths on the curves? Any limitations on the joint lengths as long as the pits are designed for such operations?

There are no limitations on the joint length however the maximum insertion pit length is 100 ft. 4/28/2020

Teichert 1 1

The installing contractor shall have a minimum of 5 years' experience in pipeline rehabilitation. Experience shall include installation of a minimum of 30,000 linear feet of pipeline rehabilitation and three projects with pipe of 42-inch diameter or larger utilizing the same sliplining trenchless technology sewer rehabilitation as is indicated in the bid. Is the 5 years’ specialized experience requirement for both prime contractor and subcontractor?

The minimum of 5 years of experience is required by the actual contractor installing the liner (installing contractor). In the event that the installing contractor is a subcontractor to the prime contractor, the experience requirements refer to the installing contractor. Additional installation contractor requirements are located in the Front End Documents

4/29/2020

Teichert 1 2

Personal experience of the construction manager with other construction companies may be substituted in lieu of the current company experience as approved by the Engineer and Owner. Does the 5 year experience apply to both the prime contractor and personal experience?

Yes. Refer to Addendum 2. The minimum 5 years of experience in pipeline rehabilitation applies to the installing contractor or, with approved by the Engineer and Owner, the personal experience of the onsite field superintendent (either with the installing contractor or with other companies) . In the later case, the personal experience of the onsite field superintendent would need to meet the same criteria (length, pipe size and number of projects) as that set out for the installing contractor.

4/29/2020

Teichert 1 3Prime contractor, Prime’s subcontractor (the installing contactor) , and Personal experience of the construction manager. Does the 5 year experience apply to all of the three parties or just one?

See response to question above. 4/29/2020

Thompson 1 1

Technical Specificati ons Section 1- 2, 2nd Paragraph. “ASTM D3262, Standard Specification for “Fiberglass (Glass-Fiber-Reinforced Thermosetting-Resin) Sewer Pipe.” Revise to “ASTM D3754, Standard Specification for “Fiberglass (Glass-Fiber-Reinforced Thermosetting-Resin) Sewer & Industrial Pressure Pipe.” The industry standard more appropriate for this application is ASTM D3754. Although D3262 is for sewer, it is recommended that D3754, for pressure sewer, be used.

Agree. See Addendum 2. 5/7/2020

Page 5 of 13




RFI No. Question#

Shea 5 1

1. Plans and Specifications do not provide clarity regarding the backfilling of the pipe at the insertion pits.a)Contract Plans C-34 and C-35 show concrete encasement at the end joints of the pipe. However, there’s no indication the pit shall be concrete encased in its entirety, or only at the end joints. Also, there’s no concrete encasement rebar detail provided and limits of encasement if it’s only encased at the end joints.b)Specifications 02636-3-10.A and 02637-3-12.A states “After the liner material is in place and approved poured in place reinforced concrete arched caps are installed, backfill the access pit excavations as specified in Trenching and Backfilling section and completely restore all disturbed areas as required.” There are no details shown in the plans of cast- in-place reinforced concrete arched cap.c)General Note 15 in G-06 states “Where specifically noted, the pipeline shall be backfilled with slurry to within the top 18” of the surrounding grade.” Plans and specs provide no indication pipe is backfilled with slurry.Please clarify backfilling details of pipe in insertion pits.

a) The intent of the concrete at the end joints is to provide capping/sealing of the RCP pipe ends. Information will be added to identify the extents of this concrete. b) Section will be edited to delete arched cap. Since installation of the flange at the tees will require removal of the entire pipe, the trench will be backfilled per Trenching and Backfilling section. c) Correct. The plans do not at any location where backfill with slurry to 18" is required.

5/12/2020

Buntich 1 1 The outside diameter of HDPE pipe is 63.0” and FRP is set at 62 inch. Could you please confirm and correct the OD to 63 inch for all pipes?

The information provided by the pipe manufacturers during design established the OD for the HDPE as 63.0” and 61.6” for FRP. 5/15/2020

Buntich 1 2 The inside diameter of HDPE pipe is about 57.75”. Would a nominal 57” FRP pipe be acceptable, since they resulting flow capacity would be equal?

No. The two pipe alternatives have been carefully selected to maximize the outside diameter that can be sliplined into the existing pipe, thereby in turn maximizing the finished internal diameter. The inside diameter of the pipeline is designed to provide the maximum available flow capacity to minimize the recurring annual pumping costs.

Buntich 1 3The spacers shown for FRP pipe is not used in long-push slipline operations. The annular space is not enough for any wheeled spacer to be used. We have sliplined over 200,000 LF of FRP pipe without spacers. Please remove spacer requirement for FRP pipes.

The requirement for spacer will be revised to allow the contractor to use them based upon his means and methods. See Addendum 3.

Kiewit 1 1 Are bidders required to submit a price for the HDPE alternate bid item? Yes. 5/12/2020

Kiewit 1 2

Sheets C-31 & C-32 reference detail C on Sheet C-42 for the concrete encasement dimensions for the 60” Steel Pipe. However, Sheets C-34 & C-35 do not reference any details on any encasement for the FRP/HDPE pipe. Please clarify if the contractor is required to encase the FRP/HDPE pipe, and if so please provide dimensions of the encasement.

No concrete encasement is required on the FRP/HDPE Manway tees. Concrete transition "caps" are required as shown on DWG C-34 and C-35. Dimensions and rebar added on C-34 and C-35. See Addendum 3.

5/12/2020

Kiewit 1 3

Spec 02636, Section 3-7.D states, "The pit shall not be wider than required and a no time shall extend more than 2 feet past the outside edge of the existing pipe." Additional space is required to accommodate cutting of host pipe and for the sliplining machine. Please confirm that the pit width is up to the Contractor's means and methods and can be as large as necessary to accommodate the work and fit between the existing pipes on either size. Pits would be up to 16 feet wide.

The pit width should be minimized to avoid conflict with existing utilities and pipelines. The pits may be up to 16 feet wide but at no time shall encroach on OC Flood Control Property. See Addendum 3.

5/12/2020


Page 6 of 13




RFI No. Question#

Kiewit 1 4

The proximity of the existing 66” RCP-SE line to the existing 120” RCP-SE line at insertion pit E on drawing C-24 and the additional soil load from the slope will possibly require an additional pile on the other side of the 120” RCP-SE line so that pressure from the shoring is not exerted on the existing 120” RCP-SE line. The additional pile would be in close proximity to the existing high pressure digester gas line. If necessary, is it possible to install temporary bracing inside the existing 120” RCP-SE pipe such as timber stulling to avoid installing piles on the East side of the 120” RCP-SE line?

The 120" pipeline is the main active pipeline conveying treated flow from Plant 1 to Plant 2. As such, installation of bracing within the 120" not acceptable. Installation of piles between the 120" and HPDG is permissible. Coordination with the Owner and a review of the proposed pile locations will be reviewed by the Owner.

5/12/2020

Kiewit 1 5 Can you please provide as-built drawings for the existing 66”, 84”, and 120” RCP-SE lines to verify the wall thickness of these lines? As builts will be provided. 5/12/2020

Kiewit 1 6 Specification 02200B states select material shall be used for backfill. Please confirm the existing soils on-site are suitable for backfill of the insertion pits. The existing on-site soils are suitable for backfill of the insertion pits. 5/12/2020

Kiewit 1 7

Drawing C-34 calls out pipe spacers for the FRP pipe. There is no mention of pipe spacers in the FRP specs and they are not typically used for sliplining FRP pipe. Please clarify if pipe spacers are required for the sliplined FRP pipe. If so, please provide a specification for the pipe spacers.

The requirement for pipe spacers on Drawing C-34 will be revised and the use of spacers will be included as an option. The contractor would submit approach for review and approval. See Addendum 3.

5/12/2020

Kiewit 1 8

During our site walk we noticed a pothole at plant 2 that had been completed which revealed several utilities in close proximity to insertion pit K that appeared to be running parallel over the 66” RCP-SE alignment. Will OCSD relocate all conflicting utilities prior to excavation of the access pits?

No it is the responsibility of the contractor on this project to relocate/support existing utilities for execution of the work. 5/12/2020

Kiewit 1 9

Specification 03610 Low Density Cellular Concrete Grout does not state the required spacing of intermediate grout shafts for grout tubes. Typically, these will need to be spaced about every 150 feet for grouting of the annular space. Is there a maximum distance required for spacing of the intermediate grout shafts?

There is no distance requirement for spacing of grouting tubes. The locations of the grout tubes or how the grout will be installed is part of the contractors means and methods and will be submitted for review and approval during the submittal process.

5/14/2020

Kiewit 1 10

Utilities Note 18 on drawing G-06 states “The Contractor shall assume and include in the bid removal of subsurface rip rap at all insertion pit locations.” Please provide the depth of the existing rip rap that the Contractor should assume needs to be removed at each insertion pit location.

In addition to where rip rap is located on grade, the contractor shall assume rip-rap from 2 to 6 foot below grade at select insertion pits. See Addendum 3. 5/14/2020

Kiewit 1 11Bid Item No.9 was added to provide a noise barrier at an insertion pit. Please provide a specification for the required noise barrier including the required STC rating.

The STC rating shall be STC-25. Additional language is added in Addendum 3. 5/14/2020

Kiewit 1 12Specification 01150, section 1-1.A.4 states that “The Contractor shall provide an onsite security guard at each active insertion pit location during off work hours.” Can one security guard be provided to patrol all the active insertion pit locations?

The contractor shall bid the project based on one security guard at each open pit location. Of issue is vehicle noise from the patrolling security guard along the alignment during the nighttime hours and proximity of neighbors. After award of contract the contractor may propose a reduced number of security guards. Approval would be based on the proximity of the open insertion pits and the ability of the guard to monitor the pits by foot. Approval is at the sole discretion of the Owner.

5/14/2020

Kiewit 1 13 Is fencing required to secure all work areas and equipment or only for the pits? Fencing is required for all work areas. The contractor is warned that the work areas are subject to theft and vandalism due to public accessibility. 5/14/2020

Kiewit 1 14

Earthwork specification 02200B, section 3-6.B.6 states “Backfill around manholes in public streets above the concrete cast-in-place base and below the street zone shall be by sand-cement slurry…” Does this apply to the manholes and access roads on this project? Please clarify if slurry backfill is required anywhere on this project.

No. Slurry backfill is not required anywhere on this project. 5/14/2020

Page 7 of 13




RFI No. Question#

Buntich 1 1

Bollards-Reference drawing C-37- The bollards shown do not match the plan view. Please provide updated plan view to match. Is there supposed to be a total of 8 bollards at the Air Vac locations(4 around the enclosure and 4 around the manway)?

At the air vac locations (Sta 50+00, 70+50, and 111+50) there shall be a total of four bollards at each location. Two on the south side of the air vac and two north of the manway.

5/22/2020

Buntich 1 2

Survey-Plan Page G-06 General Note 4 states in part, “…Construction Survey shall be by OCWD”. This note appears to conflict with various portions of the specifications including but not limited to General Provision Section 6, Special Provision Section 6.6.G, Section 1015 Section 11 and 1060 Section 1 and Section 3. Please clarify what if any survey the Contractor will be required to provide.

The contractor shall perform all surveys. See Addendum 4 which will change survey responsibility to Contractor. 5/22/2020

Buntich 1 3 Pressure Testing-Spec Section 02704- 3-3 Pressure Testing- Please provide what the pipeline PSI will be pressure tested to? Addendum 3 identified the test pressure of 75 psi. 5/22/2020

Buntich 1 4Material Testing-Plan Page G-06 General Note 4 states: “Geotechnical Testing and Material testing shall be by OCWD.” Please confirm this applies to the the low density cellular concrete grout testing referenced in specification 03610..

The low density cellular concrete grout testing shall be performed by the Contractor. See Addendum 4. 5/22/2020

Buntich 1 5

Specification 15062 2-16.1 states, “All steel pipe installed on OCSD property shall be lined and coated with a polyurethane system 114 unless noted otherwise on design drawings. , The plans note mortar lining but also conflicts between 2-16.02.02 and 3-13.08 as to whether the mortar is shop vs. field lined. Please confirm that epoxy is an acceptable lining for the steel liner between Sta. 70+50 and Sta. 80+70.

Mortar lining shall be provided on the steel section of pipe from approximately STA 70+25 to STA 81+10. This includes the steel tees and manway up to the above grade access flange. The polyurethane lining shall be provided at all other locations including all manway risers extending from the FRP/HDPE tees, and vacuum assembly steel piping. In addition to the coating requirements in the Contract Document, the exposed steel pipe coating shall have UV inhibitor.

5/22/2020

Buntich 1 6

The Redzone Robotics pipe assessment provided with the supporting documents indicates 187 CF of debris within the 66-in line. Is this the quantity of debris we are to anticipate? The CCTV summary indicates numerous areas where the camera was impeded by debris beyond the limits of the areas debris is identified in the Redzone report.

The contractor is to assume 50 cy of debris to be removed. The contractor will be required to clean/remove debris to STA 181+80. See Addendum 4. 5/22/2020

Buntich

Buntich 1 8

We are concerned that the relatively small annular space between the host pipe and liner pipe will cause the liner pipe to become stuck or otherwise impeded by the use of pipe spacers. Furthermore, it appears that the virtual mandrel test performed by Redzone considers the required spacers and thus, the results are misleading or inaccurate. Can the spacers be omitted?

In Addendum 3 the spacers were made optional. 5/22/2020

Buntich 1 9 The District has provided the “Summary of 2012 CCTV report”. Is the actual CCTV video available for review? Yes. A link will be provided for downloading CCTV video. 5/22/2020


Page 8 of 13




RFI No. Question#

Buntich 1 10

Specification 2-3.02 indicates work shall take place between April 15 and October 15, “…with additional required time being shared near the beginning and end of the wet period. During the wet season, shutdowns shall not be allowed unless authorized by the Owner to do so.” a.Please clarify, “with additional required time being shared near the beginning and end of the wet period.”b.Will the District be authorizing shutdowns during the wet season to accommodate this project?c.What work, if any, is prohibited during the wet season?

a. The intent of this requirement is that the contractor plans the work during the dry season and that additional work time be scheduled just before the beginning of the dry season and just after the end of the dry season to minimize work within the wet season. The Contractor may plan as much work within the wet season to result in completion of the work within the Contract Document completion times. b. Yes the OCSD/OCWD will be authorizing shutdowns during the wet season. c. Work during the wet season is prohibited when OCSD/OCWD requests potential use of the 66-inch pipeline because of an upcoming "major" storm event or other emergency need. The plans and specifications include language for returning use of the 66-inch pipeline to OCSD.

5/22/2020

Buntich 1 11

Specification 2-1.03 requires bulkheads be installed to remove from service the existing 66-in and 84-in lines. Can the District provide any plans or details pertinent to the installation and removal of the existing bulkheads or locations. Additionally, please provide any details pertinent to isolation of each line by way of valves, gates or bypasses and whether the District or the Contractor will bear the cost of this work.

Specification 2-1.02 provide additional information regarding the location of the bulkheads which are in the area of the OOBS. OOBS is located approximately 2,650 ft south of Insertion Pit K. Figure 1 in Attachment B of the Addendum 4 shows the location of the bulkheads and location of where they are to be installed. In addition to the existing Contract Document requirements, it is the Contractor's responsibility to lift and insert the bulkheads. It is OCSD's responsibility to close the valves at the Effluent Junction Box which is the upstream shutoff point for the 66 and 84-inch pipelines. The bulkheads are approximately 10,000 lbs each.

5/22/2020

Buntich 1 12Specification 2-1.04 allows for discharge of treated dewatering effluent to be discharged to a sewer/storm drain within Plant 2. Please identify permissible discharge locations within Plant 2.

Dewatering effluent can be discharge to the catch basins shown in Figure 2 in Attachment B. Please note that discharge of dewatering flow to an OCSD catch basin will require desilting per the Contract Documents.

5/22/2020

Buntich 1 13 Encasement- Reference drawing C36. Is an encasement per C-42 required inside the pits for the temporary connections?

No only the concrete shown on C-36 is required only for the temporary connections. The encasements shown on C-42 is only required for insertion pits D and E. 5/22/2020

Buntich 1 14 Can the utilities that are to be abandoned that interfere with the installation of the pits be cut and left open or is there a procedure for abandonment

The ends of the abandoned utilities shall be plugged. For PVC pipes the end caps shall be installed. For ductile iron, steel, and other pipe material concrete plugs shall be installed to prevent soil from entering the abandoned pipeline after backfilling. The Contractor may proposed an alternative means for positively capping / preventing soil from entering the abandoned pipe. The proposed method shall be submitted for review and approval by the engineer. See Addendum 4.

5/22/2020

Buntich 1 15There is a PVC lining material on the existing pipe in certain areas found in the CCTV report. What are the removal limits of this lining as part of the cleaning procedure.

The PVC liner does not need to be removed as part of this project unless necessary for completion of the work (Spot removal). 5/22/2020

Buntich 1 16 The cleaning operation will discharge a substantial amount of water. Confirm this water can go down the existing pipe towards plant 2.

The washwater from the cleaning operation can go down the pipeline towards Plant 2 for discharge to OOBS. If dewatering water is used for cleaning it cannot be discharged to OOBS but must be desilted then treated at Plant 2.

5/22/2020

NW Pipe 1 1 Would you allow spiral welded pipe for the steel liners ? Yes. 5/22/2020

Shea 6 1

Reference is made to Addendum 3 Modification to Plans C-2, which requires the Contractor to provide a sound barrier, meeting STC-25 requirements. Addendum 3 does not provide the portal locations where the sound barriers will be required to be installed. Please provide each location the sound barrier will be required to be installed or consider using an allowance Bid Item for the sound barrier wall install/remove. Additionally, please clarify why there is a requirement for the sound barrier to be mobile.

The intent is for the Contractor to price one sound barrier in the bid price. It is unknown at this time whether a sound barrier will be needed at one, all, or none of the insertion pits. The sound barrier should be mobile to allow use of the sound barrier components at other insertions pits as the work progresses.

5/27/2020

Page 9 of 13




RFI No. Question#

Shea 7 1

Notice Inviting Bids, page N-1, states under the heading Disadvantaged Business Enterprise Utilization and Participation that “Every bidder is required to submit the Disadvantaged Business Enterprise Contractor Subcontractor Certification form and the Program Disadvantaged Business Enterprise Selected Prime Contractor and Subcontractor(s) form in its bid proposal prior to or at Bid Opening.” Are these two forms the DBE Subcontractor Performance Form (Form 4500-3) and the DBE Subcontractor Utilization Form (Form 4500-4) found in Exhibit A Guidelines for Meeting the California State Revolving Fund (CASRF) Programs (Clean Water and Drinking Water) Disadvantaged Business Enterprise (DBE) Requirements? Or are there other forms required to be submitted with the bid? Please clarify.

Both Form 4500-3 and Form 4500-4 are REQUIRED to meet the California State Revolving Fund Program’s Disadvantaged Business Enterprise (DBE) requirements and must be SUBMITTED WITH THE BID PROPOSAL prior to or at bid opening. In addition, a DBE CERTIFICATION must be attached to each Form 4500-3 (the DBE Subcontractor Performance Form). The DBE certification form is NOT included in the guidelines (i.e., Exhibit A). Each DBE sub-contractor must obtain its DBE certification to prove its DBE status.

5/28/2020

Shea 8 1

In Addendum No. 3 it states for Drawing No. C-34 to delete Note 1 and 2 requiring spacers and in its place the revised Note 1 states spacers are recommended, but not required. However, in the same addendum Drawing No. C-34 is re-issued with the old notes 1 and 2. In addition the re-issued Drawing No. C-34 pipe detail shows the carrier pipe being centered with an equal annulus all around. Please confirm that the carrier pipe cannot lay on the invert of the existing pipe and an even annulus is required.

The spacers are optional as stated in Addendum 3. Reissuance of the drawing was to show the rebar and dimensional data on the concrete encasement. With the option of using / not using spacers the carrier pipe may lay on the carrier pipe invert if other installation requirements are met.

5/29/2020

Hobas 1 1

The pressure rating of this system is stated as 25 psi, with occasional surge to 50 psi. This is well within the ASTM D3262 and ASTM D4161 specifications. ASTM D3754 Table 5 Hydrostatic Pressure Class starts at C50 psi and extends to Class 450 psi. We manufacture PN25 (for gravity & “low pressure” systems) as well as PN50 pipes. That said, the correct specification for a 25 psi pressure class is ASTM D3262. Please include D3262 as an allowable product standard. If other suppliers wish to furnish D3754 pipe, allow both ASTMs as an “either or” option.

The ASTM Standard D3262 covers fiberglass pipe “intended for use in gravity-flow systems” and does not address pressure testing for the pipe. There is no indication of pressure testing or pressure operations in the D3262 standard. As indicated in the question this system is designed to operate at 25 psi with occasional surge to 50 psi. The product standard for this project is ASTM D3754 and D3262 will not be allowed as an option.

5/27/2020

Hobas 1 2

Hobas CCFRPM pipes are centrifugally cast which results in a solid/monolithic wall with no pin

‐

holes, weld

‐

lines or filament cross

‐

overs. The product by its nature is leak

‐

free and has a void content of less than 0.2%. ASTM D3754 requires 100% hydrostatic testing which is appropriate for filament

‐

wound pipes at the factory. CCFRPM pipes typically either are NOT mill tested, or if tested are set a rate of 1 out of 50 joints per lot, similar to what is specified in the SSPWC Greenbook Section 207

‐

20 for fiberglass pipes. Please confirm 1 per 50 joints to be acceptable interval testing for CCFRPM pipe.

As indicated in Section 6.4 of ASTM D3754 the frequency of hydrostatic leak test shall be each length of pipe up to 96-inches unless otherwise agreed upon. The frequency of testing is to provide assurance that the pipe meets the standard and should be a high enough number of pipes to be accomplish that. Based on 20-foot lengths for the 15,000 feet that would be 750 pipes, if only 1 in 50 was tested that would be 15 pipes for the project. This does not appear to be sufficient to provide the required quality assurance, but 1 out of 5 pipes would be about 150 pipe sections or 20% which provides more confidence. The required frequency of testing in ASTM D3754 for hydrostatic leak test will be modified to be 1 out of 5 pipes for the complete project

5/27/2020

Hobas 1 3

As an alternate to hydrostatic test, ASTM D2290 the “Standard Test Method for Apparent Hoop Tensile Strength of Plastic or Reinforced Plastic Pipe” is often used to verify the pressure rating. Please confirm that ASTM D2290 test is acceptable with both ASTM D3262 and ASTM D3754 standard pipes at the 1 out of 50 joints.

As indicated in Section 8.6 of ASTM D3754 the hoop tensile strength can be determined by Test Method D2290, except as modified to suit the size of the specimen to be tested. The ASTM D3754 also allows Test Method D638. The ASTM D2290 or ASTM D638 is acceptable as indicated in ASTM D3754 but not with ASTM D3262 and not for 1 out of 50 pipes.

5/27/2020

Page 10 of 13




RFI No. Question#

Hobas 1 4

The Outside Diameter of CCFRPM pipe as published in our technical literature for over 30 years as well as available online is 62.9”. This was submitted to the Black and Veatch design team back on 9/27/2018. We have sliplined over 95,000 LF of 66” RCP pipes with 62.9” OD pipes in the past 30 years with complete success. The HDPE pipe OD is 63” therefore please correct the Fiberglass Pipe OD to maximum 63 inches as well

The current Specification 02636 Item 1-1 Scope indicates “The existing RCP pipe shall be rehabilitated with a nominal 62-inch outside diameter Fiberglass Reinforced Polymer Mortar (FRPM) Pipe for a sliplining installation.” The specification should be changed to “The existing RCP pipe shall be rehabilitated with Fiberglass Reinforced Polymer Mortar (FRPM) Pipe having a nominal 61-inch to 63-inch outside diameter for a sliplining installation.” The OD of the Fiberglass Pipe will be revised to a nominal range of 61 to 63 inches.

5/27/2020

Kiewit 2 15

Specification 02636, section 3-5.B states “After cleaning, inspection of pipelines shall be performed by the Contractor using closed circuit television (CCTV) inspection techniques as specified in the Television Inspection of Sewer Pipelines Section to confirm the pipe is prepared for lining.” The Television Inspection of Sewer Pipelines specs could not be located in the documents. Please provide the CCTV specs.

Contractor should hire competent firm with CCTV experience to verify cleaned condition of pipe is acceptable to slipline pipe installer. 5/26/2020

Kiewit 2 16

Specifications, Volume 1, IFB, I-6, Contractor’s Insurance requires subcontractors to maintain the same insurance required of the Contractor under the Contract Documents. These coverages and limits may not be commercially available or would be cost prohibitive to most subcontractors, particularly the DBE subcontractors. Please amend to: “CONTRACTOR’S INSURANCE: . . .The Contractor shall not allow any subcontractor to commence Work on its subcontract until any such subcontractor has obtained the same insurance required of the Contractor under the Contract Documents Contractor shall require subcontractors to provide insurance per Subcontractor’s usual business practices.”

If necessary, the General Contractor may insure their respective subcontractors for the full required coverage. 5/26/2020

Kiewit 2 17

Specifications, Volume 1, Insurance Conditions, IC-1, 2nd Paragraph requires subcontractors to provide and maintain the same insurance as the Prime Contractor. These coverages and limits may not be commercially available or would be cost prohibitive to most subcontractors, particularly the DBE subcontractors. Please amend to:“ . . . nor shall the Contractor allow any subcontractor to commence work on its subcontract until all insurance required herein of the Contractor has been obtained by such subcontractor. Contractor shall require subcontractors to provide insurance per Subcontractor’s usual business practices.”


Kiewit 2 18

Specifications, Volume 1, Insurance Conditions, IC-1, 4th Paragraph requires renewal Certificates of Insurance 30 days prior to the expiration of the current coverage. Renewal policy numbers are not always available 30 days in advance. Will the Owner amend the requirement to 15 days in advance of expiration?

Noted. The wording will not be changed at this time, however OCWD will review this on a case by case basis. 5/26/2020

Kiewit 2 19

Specifications, Volume 1, Insurance Conditions, IC-1, 4th Paragraph states if additional insurance requirements are required at a later date, the Contractor will satisfy those additional insurance requirements. Please confirm these are limited to insurance that is commercially available at the time of the request and will be at the OCWD’s cost.

Confirmed. 5/26/2020

Page 11 of 13




RFI No. Question#

Kiewit 2 20

Specifications, Volume 1, Insurance Conditions, IC-1, 1. requires $10 mill per occurrence limits or the full policies limits available, whichever is greater. However, the required Additional Insured ISO forms CG 20 10 04 13 and CG 20 37 04 13, only provides limits as required by contract. Further, the most current versions of these endorsements ISO CG 20 10 12 19 and CG 20 37 12 19. Please amend to the following:“. . ($10,000,00) per occurrence or the full per occurrence limits of the policies available, whichever is greater.” “1. Additional Insured Status - . . . CG 20 1004 1312 19 and CG 20 37 04 1312 19 may be used in lieu of CG 20 10 10 01 and CG 20 37 10 01.”

Noted. The wording will not be changed at this time. 5/26/2020

Kiewit 2 21

Specifications, Volume 1, Insurance Conditions, IC-2, 4. requires the Contractor to have the risk of loss for the Work until final acceptance. Builders’ risk coverage ends upon Substantial Completion or when the Work, or portion of the Work, is put to its intended use, whichever occurs earlier. It is not equitable to give the Contractor the risk for loss it cannot insure. The Contractor’s risk of loss should end upon Substantial Completion or at the point the Work is put to its intended use by the Owner, whichever is earlier. Accordingly, Bidder requests the following revision: “Responsibility for Work – Until the Substantial Completion and final acceptance by the OCWD of all the work, or portion of the work deemed Substantially Complete, under and implied by this agreement, the work shall be under the Contractor’s responsible care and charge. . .The Contractor shall provide and maintain Builder’s Risk (course of construction) or an installation floater (for materials and equipment) covering all risks of direct physical loss, damage or destruction to the work to insure against such losses until final acceptance Substantial Completion of the work, or portion of the Work, by the OCWD.”


Kiewit 2 22

Specifications, Volume 1, Insurance Conditions, IC-4 requires that if the Contractor maintains higher limits than the minimums shown above, the OCWD shall be entitled to those limits. However, the required Additional Insured ISO forms CG 20 10 04 13 and CG 20 37 04 13, only provides limits as required by contract. Please amend to the following: “If the Contractor maintains broader coverage and/or higher limits than the minimums shown above, the OCWD requires and shall be entitled to the broader coverage and/or higher limits maintained by the Contractor.”


Kiewit 2 23

Specifications, Volume 1, Insurance Conditions, IC-4, Continuation of Coverage states the Contractor shall provide products-completed operations for at least five years after completion of the Project. Please confirm Liability Insurance policies that renew annually for 5 years will meet this requirement.


Page 12 of 13




RFI No. Question#

Kiewit 2 24

Specifications, Volume 1, Insurance Conditions, IC-4, Subcontractors requires subcontractors to meet the same minimum insurance requirements as the Prime Contractor. As indicated above these coverages and limits may not be commercially available or would be cost prohibitive to most subcontractors, particularly the DBE subcontractors. Further, the size and scope of this project would also make the additional premium cost of a project-specific Contractor Controlled Insurance Program (CCIP) poor value for money and potentially cost prohibitive. Please consider the below amendment: “Subcontractors – In the event that the Contractor employs other contractors (subcontractors) as part of the work covered by this agreement, it shall be the Contractor’s responsibility to require and confirm that each that each subcontractor meets the minimum insurance requirements specified above (via as broad as ISO CG 20 38 04 13)maintains appropriate insurance pursuant to the subcontractors’ scope of work.”


Kiewit 2 25

Specifications, Volume 1, Insurance Conditions, IC-4, Note 3 requires renewal Certificates of Insurance are subject to approval and acceptance by the Orange County Water District. Please confirm the OCWD will accept the below revision: “Note 3: All insurance terms provided by the Contractor for this contract are subject to reasonable approval and acceptance by the Orange County Water District.”


Kiewit 2 26

Specifications, Volume 1, General Provisions, GP-42.K requires the Contractor to bear the risk of loss until formal acceptance of the Work by the District. Contractor’s risk of loss should end upon Substantial Completion or at the point the Work is put to its intended use by the Owner, whichever is earlier. Please consider the following revision: “Contractor’s Responsibility for Work – Until the formal acceptance Substantial Completion of the Work, or portion thereof, by the District, the Contractor shall have the charge and care thereof and shall bear the risk of injury or damage to any part thereof by the action of the elements or from any other cause whether arising from the execution or form the nonexecution of the Work . . . The Contractor shall rebuild, repair, restore, and make good all injuries or damages to any portion of the Work occasioned by any of the above causes before its Substantial completion and acceptance and shall bear the expense thereof; . . .”


Page 13 of 13

Attachment B

Figures

OOBS

STOREDBULKHEADS

66-INCH BULKHEADINSERTION POINT

84-INCH BULKHEADINSERTION POINT

FIGURE 1

BULKHEADS

OOBS

CATCH BASIN

CATCH BASIN

APPROXLOCATION OFINSERTION PIT K

OCSD PLANT 2

CATCH BASIN

CATCH BASIN

FIGURE 2CATCH BASINS