Sam Nunn UST Replacement Questions and Responses (1) (1).pdf

Solicitation #47PE0220R0035 UST Replacement Sam Nunn AFC Atlanta, GA

Pre-Proposal Site Visit Questions and Responses

1. We need to know the Structural Load Capacity of the Van Loading/ Parking area (The safe Load Capacity per square foot) GSA RESPONSE: This is a design-build project.

Any required structural calculations or investigation must be completed by the A/E.

Contractor is responsible for verification of all existing conditions.

2. Storing and Staging areas of materials/ materials for backfill and temporary storage of the removed 10,000 gal dbl wall tank. GSA RESPONSE: No separate storage or staging area available for materials and equipment (new or removed). Materials and equipment must be delivered to the site as needed for immediate installation.

3. Equipment storage areas. GSA RESPONSE: See response to Question #2.

4. What is the structural load capacity above the existing UST? GSA RESPONSE: See response to Question #1.

5. We are requesting all O&M/ Drawings on fuel tank and system. GSA RESPONSE: See attached O & M documents.

6. Can we fill existing UST(after washout) with a grout slurry and abandon in place? GSA RESPONSE: If abandon in place is approved by the government after all replacement options have been considered, the contractor must follow proper GA DNR guidelines and regulations for proper tank closure.

7. Can a Self Contained AST be installed in the same location of the existing UST? GSA RESPONSE: Per the SOW and as part of the design, the contractor shall provide options for tank configuration and placement. The government will determine the best option based on all identified factors for consideration. Please Note: The Proposed Design and Location for the AST must be in accordance with the requirements of GSA’s current edition of PBS-P100 and its currently adopted edition of NFPA 30. This will likely require an indoor AST to be installed within a Vault meeting the criteria of NFPA 30.

8. Can the existing UST be removed back filled and a self contained AST be installed in the same location? GSA RESPONSE: See response to Question #7.

9. Does the GSA intend to hire a CM (SOW paragraph III.C, pg 6)? GSA RESPONSE: GSA has not determined if a CM will be used on this project.

10. How much notice will be required for after hours work? And will we have to arrange for security? GSA RESPONSE: A 48 hour notice will be required for after hours work.

And the contractor will need to arrange for security.

Sam Nunn AFC Atlanta, GA

11. SOW Paragraph 7.III - are there any existing as-builts? GSA RESPONSE: See response to Question #5.

12. Can the sprinkler service be tapped off the existing buildings system? Or is new service, meter, backflow, riser, etc. required for the new enclosure? GSA RESPONSE: The Fire Sprinkler Service may be tapped off the Existing Building System if done in accordance with the current edition of GSA’s PBS-P100 and it's currently adopted Editions of NFPA 13 and NFPA 30. Any Fire Sprinkler Work shall require a Licensed Fire Protection Engineer as part of the Design Team in accordance with GSA’s PBS-P100.

13. Can the government provide details of any Notices of Violation issued by GA EPD? GSA

RESPONSE: See attached Notice of Violation dated March 2, 2020.

14. Does the government have any as-built drawings or material quantity details from the original UST and piping installation that can be provided? GSA RESPONSE: See response to Question #5.

15. Can the government provide any available OEM information on the existing system? GSA RESPONSE: See response to Question #5.

16. Can a site visit be planned with all bidders and the State and Local Fire Marshal prior to the proposal due date? GSA RESPONSE: No additional pre-bid site visits will be scheduled.

17. Can the due date be extended two weeks to allow for scheduling a site visit with all bidders and the Fire Marshals? GSA RESPONSE: No additional pre-bid site visits will be scheduled.

18. If the Fire Marshals have already cleared the potential locations for the replacement tank, can correspondence be provided? GSA RESPONSE: The contractor will be responsible for obtaining any required permits and clearances from GA DNR or other regulatory agencies for suggested tank locations. Contractor is responsible for completing any required structural analysis of potential locations. Any structural analysis or calculations must be completed by a licensed Structural Engineer. Please Note: The Contractor will need to install any proposed AST in a Vault in accordance with the current Edition of NFPA 30 if it is located within the Building.

19. Does the government have an estimate of the amount of fuel that will be remaining in the tank at the time of Notice to Proceed? GSA RESPONSE: Approximately 8,000 gallons.

20. Will temporary tanks need to be wired into the existing control system? GSA RESPONSE:

Yes.

Sam Nunn AFC Atlanta, GA

21. Can structural details be provided for the CMU wall and bracing in the room behind the generator room? GSA RESPONSE: Some original structural drawings are available.

These must be requested individually. General access will not be granted.

22. What is the fuel consumption per hour for the generators at full capacity? GSA RESPONSE: Under full demand conditions, the generators consume fuel at a rate of approximately 150 gal./hr

23. What is the piping run distance from the UST to the generator room day tank? GSA

RESPONSE:

24. Temporary tank – What is the required capacity in gallons for the temporary fuel tank?

GSA RESPONSE: 3000 gallons (JF, Scott please double check if this is OK)

25. Fire Protection – Does fire protection need to be provided for the temporary fuel tank? GSA

RESPONSE: Yes, Fire Protection needs to be provided for the temporary fuel tank and the Contractor must comply with NFPA 241, Standard for Safeguarding Construction, Alteration, and Demolition Operations, 2013 Edition.

26. Type of Tank:

a. Item I on page 9 states that a double-wall UL 2085 UST or AST is to be installed.

For clarification, manufacturers do not make a UL 2085 UST; that rating is only for a type of double-wall AST (it is a fire resistant tank). GSA RESPONSE: Comment acknowledged.

b. Item L on page 9 refers to a containment berm/wall capable of holding 100% of the tank’s content. Is the double-wall tank sufficient for this definition or is a containment berm to be “in addition to” the double-wall tank. GSA RESPONSE: If it is a double wall tank, no need to have secondary containment.

27. The pandemic may affect the time required to get a replacement UST or AST(s). Is the duration time allowed for the construction phase flexible to allow for acquisition of the new tank(s)? GSA RESPONSE: Yes.