Amend 0004.pdf

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT 1

1. CONTRACT ID CODE

I

PAG

OF PAGES

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2. AMENDMENT/MODIFICAITON NO. 3. EFFECTIVE DATE 4. REQUISITION/PURCHASE REO. NO.

5. PROJECT NO. (If applicble)

AMENDMENT NO. 0004 08/28/25 24-0014

6. ISSUED BY CODE N40085 7. ADMINISTERED BY (If other than Item 6) CODE I

NAVFAC Mid-Atlantic See Item 6

Resident Officer in Charge of Construction 1107 A Birch Street Camp Lejeune, NC 28547-2521

8. NAME AND ADDRESS OF CONTRACTOR (No., street, county, State and ZIP Code) (X) 9A. AMENDMENT OF SOLICIATION NO.

,c N40085-25-R-9021

9B. DA TED (SEE ITEM 11)

08/08/25

10A. MODIFICATION OF CONTRACT/ORDER NO.

1 OB. DA TED (SEE ITEM 11)

CODE I FACILITY CODE

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

[RI The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offers D is extended, [RI is not extended.

Offers must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended, by one of the following methods:

(a)By completing items 8 and 15, and returning 1 copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted;

or (c) By separate letter or telegram which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGMENT TO BE RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN REJECTION OF YOUR OFFER. If by virtue of this amendment your desire to change an offer already submitted, such change may be made by telegram or letter, provided each telegram or letter makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

12. ACCOUNTING AND APPROPIRATION DATA (If required)

13. THIS ITEM ONLY APPLIES TO MODIFICATION OF CONTRACTS/ORDERS.

IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

CHECK ONE A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE CONTRACT ORDER

NO. IN ITEM 1 OA.

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, appropriation date, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43. 103(b).

C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER (Specify type of modification and authority)

E. IMPORTANT: Contractor D is not, D is required to sign this document and return copies to the issuing office.

14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

24-0014, Multiple Location Diesel Pump Repairs Amendment 0004, Answer Requests for Information

The time and date for receipt of proposals remains September 4, 2025 at 02:00 PM EDT.

This amendment should be acknowledged when your proposal is submitted.

the amendment may constitute grounds for rejection of a proposal.

Failure to acknowledge

See Continuation Page(s)

Except as provided herein, all terms and conditions of the document referenced in Item 9A or 1 OA, as heretofore changed, remains unchanged and in full force and effect.

15A. NAME AND TITLE OF SIGNER (Type or print) 16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)

1 5B. CONTRACTOR/OFFEROR

(Signature of person authorized to sign)

NSN 7540-01-152-8070

Previous edition unusable

15C. DATE SIGNED 16B. UNITED STATES OF AMERICA 16C. DATE SIGNED

(Signature of Contracting Officer)

STANDARD FORM 30 (REV. 10-83)

Prescribed by GSA FAR (48 CFR) 53.243

N40085-25-R-9021 Amendment 0004

CONTINUATION SHEET

1. QUESTION: The lead-time for the Diesel Pump is from 7-9 months. Project duration needs to be at least 1.5 years. Please advise if this assumption is correct.

ANSWER: Concur. 540 day project duration is acceptable.

2. QUESTION: Site RR470 Do we need to maintain the wastewater flow for the wastewater pit? What is the flow rate capacity that needs to be maintained?

ANSWER: Outage durations vary for each location. Coordinate max outage times with PWD.

Tapping sleeves can be used for fast connections to force mains. Flow rates of the lift stations are equivalent to flows identified on pump schedules.

3. QUESTION: Please specify the check valve type that needed for this project.

ANSWER: Provide horizontal swing check valves that permit a free flow of sewage forward and a positive check against backflow. Provide with iron body, bronze mounted, stainless steel shaft, and flanged ends with a minimum working pressure of 175 psig and meets AWWA C508 specifications. See Specification sections 33 31 23.00 10 and 33 32 16.

4. QUESTION: On (E) Panel A circuits 25, 27 and 28 belongs to the fresh air HVAC purification unit and there is only one blank circuit available on the unit. Please advise where to get the power from.

ANSWER: Provide a 20A single pole breaker on empty space in Panel A and provide a weatherproof quadruplex receptacle mounted on pump enclosure. Use quadruplex receptacle to plug in desired accessories (block heater, battery charger). No dedicated breakers are required.

Provide and connect wiring and conduit from the breaker to the quadruplex receptacle.

5. QUESTION: CS101, CS102, C104, and CSA 106 Notes 6 and 7 instruct to build a sewer vault and to revery to the mechanical drawings for the location and sizing. The provided vault detail is generic and not to scale. Please provide some details on the vault size and depth location and the valve assembly.

ANSWER: Keynote #6 refers to the manhole structure/access vault for the check valve (min.

Keynote #7 refers to the vault for the isolation valve which can only be accessed via tee handle depending on final tie-in location. Refer to Mechanical sheets for location.

Locations of valves were provided to Civil by Mechanical. Sizing of valves and vaults vary depending on associated pump(s) and dictated min. clearances around valves. Sizing of existing and proposed pipes for connections are located on sheets M-301 to M-306.

Depth of utility lines will be confirmed by Contractor at each tie-in location by potholing and verifying existing depths per notes 2 & 3 on sheet C-001.

6. QUESTION: M350 Does the existing demolished pump need to be turned over to the base or does need to be trashed?

ANSWER: Lift Station M350 temporary pump will be retained and relocated prior to construction with no action required by the general contractor.

7. QUESTION: On sheet E101 at M350 it calls for running three dedicated circuits to panel A at circuit 25, 27 ,and 29. Currently used to feed the air cleaner unit. We have blank space 29 available. Circuit 16 and 19 are currently turned off. Please advise where to get the power from.

ANSWER: Provide a 20A single pole breaker on empty space in Panel A and provide a weatherproof quadruplex receptacle mounted on pump enclosure. Use quadruplex receptacle to plug in desired accessories (block heater, battery charger). No dedicated breakers are required.

Provide and connect wiring and conduit from the breaker to the quadruplex receptacle.

8. QUESTION: The work on the 6 buildings can be done together or they have to go after each other. Please advise.

ANSWER: The work can be done simultaneously.

9. QUESTION: Lift Station PT3C There are two Pine Trees outside of the existing fence. When the new fence is moved to the new location, the trees will be in the way or in the parameter of the facility fence. Do we extend the fence to allow the trees to be inside of the fence border or do we need to cut them down.

ANSWER: Remove and dispose of appropriate trees and vegetation in entirety.

10. QUESTION: Lift Station PT3C, and 590 sheets M-105, M-106, M-305, and M-306 shows some drawings markup corrections (attached). Please correct and/or confirm.

ANSWER: Concur with drawing markups. Contract drawings provided to reflect changes.

11. QUESTION: Lift Station PT3C sheet MD 105 Keyed Note 2 request to demolish the elbow above ground. But it did not mention to cap off the remaining discharge pipe. Please confirm.

ANSWER: Yes, cap existing pipe in vertical above grade once flowable fill is complete to match key note 3 on MD104 and key note 2 on MD106.

12. QUESTION: Lift Stations PT3C, and 590 Does the existing demolished diesel pumps need to be turned over to the base or does need to be trashed?

ANSWER: Give all operational pumps back over to government. Coordinate and deliver to wastewater facility FC441 shown on sheet G-002.

13. QUESTION: Lift Station 59 When moving the fence out, the Vegetation and tree that are in the new area. Do we cut and make the grade level to mow the grass in the new area, or do we just cut what is needed to put up the new equipment and fence?

ANSWER: Remove and dispose of appropriate trees and vegetation in entirety, clear and provide positive drainage away from site and sod all disturbed areas according to vegetation schedule on sheet C-500.

14. QUESTION: The specification 333216 paragraph 2.5 "Pump Motor" describes electric motors however the project involves diesel powered pumps. Please specify the diesel-powered pump.

ANSWER: Substitute spec section 33 32 16 paragraph 2.5 with the following:

The drive unit shall be a diesel, water-cooled engine. The engine shall drive the pump by use of a direct-connected intermediate drive plate. Starter shall be 24VDC. A control panel consisting of a low oil pressure safety shutdown and high temperature shutdown shall be integrated into the engine control panel. Unit shall include a tachometer and an hour meter. A certified continuous duty engine curve shall be provided in the product submittal for review and approval.

15. QUESTION: Lift Station MD106 the sewer suction line at the left is penetrating a sidewalk.

The drawing did not call for repair or replace the concrete sidewalk section. Please advise

ANSWER: Saw cut, remove and dispose of concrete sidewalk as required to remove/ dispose of the suction line. Infill demolished area of sidewalk with concrete to match existing sidewalk in width, surface finish and edging.

16. QUESTION: Lift Station MD104 Keynote 5 and M-104 keynote 2 are not matching the electrical ED104 keynotes 1 & 3 and E-104 keyed note 2. Please confirm that the correct panel is ( E ) Panel B S1650 and NOT ( E ) Panel A.

ANSWER: Concur, correct panel for 1650 on ED104 and E-104 is (E)Panel B S1650.

17. QUESTION: M101 directs the contractor to terminate the suction end 24" above the bottom of the lift station, M301 indicates the end of suction at -3' elevation and bottom of the pump station a -7' elevation. Do we terminate at 2' or 4' from the bottom of the wet well.

ANSWER: M- Refer to addendum drawings Rev 1 dated 8/21/2025.

18. QUESTION: M102 directs the contractor to terminate the suction end 24" above the bottom of the lift station, M302 indicates the end of suction at -3' elevation and bottom of the pump station a -7' elevation. Do we terminate at 2' or 4' from the bottom of the wet well.

ANSWER: M- Refer to addendum drawings Rev 1 dated 8/21/2025.

19. QUESTION: M104 directs the contractor to terminate the suction end 24" above the bottom of the lift station, M304 indicates the end of suction at 12'-6" elevation and bottom of the pump station a 8'9"' elevation. Please advise

ANSWER: M- - Refer to addendum drawings Rev 1 dated 8/21/2025.

20. QUESTION: M305 indicates the top of the wet well wall at elevation 16'. CS105 indicates the surrounding ground contours at 26' elevation. Please advise.

ANSWER: Civil elevations are based on NAD83 for horizontal and NAVD88 for vertical.

Mechanical elevations are based on as-built drawings. Refer to civil drawings for absolute elevations. For work on mechanical drawings, utilize elevations as relative distances from grade and from bottom of existing pit.

21. QUESTION: M105 directs the contractor to terminate the suction end 24" above the bottom of the lift station, M305 indicates to terminate 4' above the floor of the wet well. Please advise

ANSWER: M- Refer to addendum drawings Rev 1 dated 8/21/2025.

22. QUESTION: CS105 shows the check valve vault for the pump is in 5'-3" space between both pump pads. The drawing calls for 24" clearance around the valve, so when we add up 6" vault wall, 24" clearance, 18" valve, 24" clearance and a 6" vault wall the required space equals 6'-6". This means the vaults will encroach on the pump pads. Please advise.

ANSWER: Move pump #1 to the east (plan south on sheet M-between the two pads is - -

23. QUESTION: M306 shows the top of the wet well wall at elevation 16', but the surrounding ground contours of sheet CS106 is at elevation 9'. Please advise.

ANSWER: Civil elevations are based on NAD83 for horizontal and NAVD88 for vertical.

Mechanical elevations are based on as-built drawings. Refer to civil drawings for absolute elevations. For work on mechanical drawings, utilize elevations as relative distances from grade and from bottom of existing pit.

24. QUESTION: M106 indicates termination of the suction 24" above the bottom of the floor.

M306 shows the suction 4' off the floor of the wet well. Please advise.

ANSWER: M- Refer to addendum drawings Rev 1 dated 8/21/2025.

25. QUESTION: There was significant hydrogen sulfide corrosion observed on the existing pipe around the lift station. Has the owner considered using HDPE pipe for the suction and discharge in lieu of ductile iron for its corrosion resistance?

ANSWER: Provide ductile iron piping.

26. QUESTION: No air reliefs are shown in the proposed pump drawings, air relief should be considered on the discharge pipe to prevent air locking the pump.

ANSWER: Provide pump with priming system per specifications. Provide additional air relief valves if required per recommendations.

27. QUESTION: Valve access well detail 9-C500 is misleading, detail shows a hand wheel below grade, specification 333123.0010 calls for 2" square nut on a stem extension within 6" of the surrounding ground. Typically a cast iron valve box with 2'x2' concrete collar is used in this situation. Please advise.

ANSWER: Concur, in lieu of detail 9/C-500 as drawn, see following detail:

28. QUESTION: A insulation specification is provided however the drawings do not indicate where insulation is required. We assume the exposed discharge piping would only require insulation because the check valves would retain liquid in the discharge pipe when not in use. The suction pipe would drain back into the wet well when suction is lost, so none is needed there.

Please advise.

ANSWER: Concur, suction piping does not need insulation.

29. QUESTION: M104, the pump suction line appears to utilize the same opening with the access ladder. The ladder will not be usable once the pipe is installed. Please advise.

ANSWER: Concur, the suction line will be shifted plan south to avoid the access ladder.

30. QUESTION: CD104 and CD106 have notes to fill and seal the existing pipe to the inside surface of the wet well. A bulkhead will be required inside this chamber of the wet well to prevent the filling material from filling the actual wet well. Is there any existing drawings of these pipes and the inside connection point? Is there a particular fill material specified in sealing the pipes, i.e. sand,, concrete, flowable fill? Or does the owner just want us the cap the pipe outside of the pump station 1' below grade?

ANSWER: Both ends need to be capped to prevent unwanted intrusion. Contractor to cap both ends, furnish and install flowable fill and seal.

31. QUESTION: During the site visit at PT3C, an offset was observed in the existing suction pipe for pump 1 that was not shown in the drawings. The proposed suction layout appears to utilize the same core however without the offset the proposed piping will miss the existing hole in the slab.

Is the contractor to core a new hole and cover the existing hole with a plate? Please advise.

ANSWER: Provide offset and reuse the existing hole in slab.

32. QUESTION: Drawings M101, M102, M104 and M105 are vague in the connection of the new discharge piping and to the existing force main. We assume this connection will be done using a tapping saddle and tapping valve. This is the cheapest method that would allow the force main to stay in operation and not be interrupted. The tapping valve would also serve as the isolation valve.

Please advise.

ANSWER: Concur, tapping sleeve is acceptable. Provide pipe spool extension such that isolation valve can be located within vault per detail 9/C-500.

33. QUESTION: Lift Station PT3C: Lift station has the above-mentioned signs. PT3C has an area where part of the chain fence needs to be relocated. A new area will be added the work area that will includes digging and utilizing the equipment in possible munitions hazard area. How will we deal with the possible munitions hazards warning within the contract area? Who will search and clear that area from the munitions? Please advise

ANSWER: 3R training is required for all construction workers which can be completed by viewing one of the videos on the following link. A training roster must be available on site and provided upon request. If any UXO is found during work, then workers should Call 911.

https://www.lejeune.marines.mil/Offices-Staff/Environmental-Mgmt/Training-Video/

34. All other terms and conditions remain unchanged.