Atch 7 Post SV Questions and Answers.pdf

DEPARTMENT OF THE AIR FORCE

90TH MISSILE WING (AFGSC)

DETER • MODERNIZE • STRIKE

1 June 2026

MEMORANDUM FOR RECORD

FROM: 90 CONS/PKAB

SUBJECT: Project Number: GHLN 25-5143; Project Title: Replace UST at D02; Notice ID:

FA461326R0002; Attachment #7 - Questions & Answers

1. Please confirm that equipment will be allowed to be kept overnight outside of the fence, 100 feet on each side of the access road.

Answer: The contractor shall be able to store equipment outside of the fence and within 100’ of the access road in accordance with landowner and / or leaseholder agreement(s).

Landowner contact information will be provided after contract award. Contractors shall assume the land will be available for bidding purposes.

2. During Job Walk it was mentioned the spill bucket has been updated. The construction drawings do not provide the information for the updated spill bucket. Please provide the make and model of the new spill bucket the contractor is to provide.

Answer: “The Edge” model 1SC-3112D spill bucket mentioned in the initial SOW is obsolete. the Franklin Defender Model 705555211 CI-GKT or OPW “The Edge” model 1SC-3132D or approved equivalent shall be used. See revised SOW dated 1 June 2026.

3. Due to the size of the excavation to remove the existing fuel tank, the existing light pole may need to be removed. Please confirm the contractor is not required to provide a temporary light tower while the existing light pole is out of service.

Answer: Temporary light tower will not be needed.

4. What is the compaction density of the backfill material around the tank and road required to be?

Answer: Compaction varies by location and depth see the specifications; CSI 31 00 00 – Earthwork.

5. Confirm that there is roughly 140 gallons of diesel/sludge in tank that will be required to be removed.

Answer: 90CES/CEIE representative stated there are 137 gallons of sludge remaining in the tank.

6. The Excavation equipment comes standard with back up cameras and GPS. Will equipment with cameras and GPS be allowed onsite?

Answer: GPS is acceptable so long as no data is recorded and is turned off. Equipment cameras are acceptable so long as no images are recorded.

7. Please confirm vibration alarms are shut off during work activity or will the contractor have restrictions on excavating/backfill.

Answer: Vibrations alarms will not interfere with excavation.

8. On sheet 6, the “Isometric view of LFSB”. Says to “SEE NOTE 4 THIS SHEET” The sheet Notes do not have a note #4. Please confirm the information for Note 4 detail does not apply.

Answer: Information for Note #4 is not applicable.

9. The drawings show abandoning the existing fuel lines in place where they enter the bldg.

and to core new holes through the concrete for the new fuel lines. During site walk it was mentioned we are to tie into existing fuel lines outside of the support building and are not required to core new penetrations into the bldg. Please confirm.

Answer: New fuel lines shall connect into the existing fuel penetrations. No new core penetrations.

10. Please provide pictures from site walk.

Answer: See pages 6-21 of this Q&A.

11. The existing concrete antenna pad shown on sheet 2, shows to “protect in place”. Please confirm the installation of the existing concrete antenna pad is sufficient to not be disturbed/undermined during the removal of existing fuel tank that is 16 feet deep.

Answer: The concrete for the antenna pad is believed to be stable for the specified excavation. The contractor is responsible for notifying 90CES/CEM if the belief is incorrect.

12. Please confirm new tank monitor shown on sheet 5 can use the existing breaker from the old tank monitor, if not provide the size and style of breaker.

Answer: The contractor shall use the existing breaker.

13. Sheet 2 “Detail A” shows existing electrical lines running over the existing fuel tank.

Confirm the existing power lines can be removed and replaced after the installation of the new fuel tank.

Answer: Existing underground electrical lines will be removed then replaced for UST removal and installation.

14. Page 13 of the SOW paragraph 8 Utility Services, states site facilities (i.e. Construction

Trailer) are required for employees for lunch and break. Please confirm site facilities are to be included in the proposal.

Answer: Paragraph 8.b on page 13 of 39 states, “The Contractor shall provide site facilities for lunch and break areas, as needed.”

No additional facilities will be on site other than what was present during the site visit.

The paragraph does not require the contractor to provide additional site facilities for lunch, etc. It is a heads up not a USAF requirement.

15. During the site walk the requirements for red-line drawing were discussed. Please confirm red-lines can be done on hard copies and turned over to the government and the red-lines do not need to be in digital files from electronic drafting software.

Answer: Redlines can be hand drawn and turned over to 90CES/CEM as long as dimensions are provided for others to draw at scale, are neatly written, and are legible.

16. During the site visit it was stated the existing fuel tank is 14,000 gallons and is approximately 8 feet diameter, 40 feet long, and the thickness of the tank walls are 1 inch. Please confirm these sizes for calculating the weight of the existing tank.

Answer: Dimensions are confirmed.

17. During the site visit we discussed government access for re-fueling the day tank during the removal of the existing fuel tank (open excavation) and backfilling around the new fuel tank. Please confirm during these construction activities the government will suspend training exercises and refueling of the day tank.

Answer: The contractor shall provide access for re-fueling day tank. The day tank is minimally run unless there is a power outage. In the event of a power outage the USAF will need access to the day tank to refill the day tank regardless of project phase. The contractor will be notified of training exercises in a timely manner.

18. Please confirm the use of nuclear density testing equipment is allowed for compaction testing.

Answer: Nuclear soil density gauge use is authorized.

19. Engineer of Record mentioned that the model of the spill bucket in the drawings has been changed to a different model. We will need updated information on the correct model for this project.

Answer: See question 2 answer.

20. Govt mentioned Contractor obtaining dig permit within the footprint of contracted scope of work. Recommended calling 811 for outside of the contracted work area. What kind of address or identifying location is to be used for this site location when calling into 811?

Answer: When contract is awarded an address for the LF will be provided.

21. Sensor Alarms on rails – will sensor alarms be disengaged at a minimum during construction work hours? Due to sensitivity of rail sensors the equipment being used during excavation, tank removal, construction will cause vibration and continual setting off of alarms?

Answer: Sensor Alarms will be managed by USAF and are not expected to be an issue.

22. Electric lines extending out from underground facility structures run out beyond secured fence area. Please confirm if these lines are abandoned or are in use and what they feed.

Answer: These lines are in use but will be de-energized until electrical connection can be re-established after proposed UST installation.

23. Will As-built drawings be readily accessible on-site during construction?

Answer: As-built drawings were used to develop bid drawings. As built drawings will be made available if requested after contract award.

24. In case of inclimate weather where is the nearest shelter in place?

Answer: In case of inclimate weather direction will be provide through site escort for shelter in place location.

25. Compaction testing – is it acceptable to use “nuclear” testing equipment on this site?

Answer: See question 18 answer.

26. Can you verify the volume of material in the tank?

Answer: See question 5 answer.

27. Can the tank be removed from current location prior to removing the material inside the tank?

Answer: Yes, provided movement is in accordance with all applicable laws and regulations.

28. Is it known if there are lifting eyes on the existing tank? Can lifting eyes be welded on if needed.

Answer: Lifting eyes are believed to be present. Unknown if they are suitable for lifting the tank after 60-70 years below grade. The contractor shall use any prudent and practicable means needed to safely lift the tank.

29. Can you verify maximum excavation depth is 12’?

Answer: Maximum excavation depth is 16’ or top of existing concrete anchor slab for existing UST. Minimum testing depth is 12’ not to exceed 16’ below existing grade.

30. Can the ditches outside the fence be temporarily filled if a culvert is installed for equipment use?

Answer: Contractor shall be responsible for any flooding which may result from insufficient site drainage.

31. Abandon in place product lines requires sampling by drilling to ground water. Is the ground water depth known?

Answer: Through consultation with 90CES/CEIE the existing fuel lines shall be removed for disposal and are believed to match the UST for materials used. Groundwater depth is not known. See revised SOW dated 1 June 2026.

32. If the excavation to remove the contaminated soil is around the product lines, can they be removed instead of abandoned in place?

Answer: The project scope is revised so the fuel lines are to be removed instead of abandoned in place. See revised SOW dated 1 June 2026.

LIEZEL McINTYRE, Civ, DAF Contracting Officer **Photos from the Site Visit Below**

1545667513C Stamp