Answers to RFIs for Solicitation 36C25725R0083.pdf

Answers to RFIs for Solicitation 36C25725R0083

Project 549-25-524 Heat Exchanger Replacement

1. At the top of the Scope it refers to 3 Heat Exchangers to be replaced with an extensive SOW but at the bottom it refers to two Heat Exchangers to be removed. Is there a total of 5 Heat Exchangers? If so, there is no detailed scope on the other two other Heat Exchangers.

Answer:

Yes, there is a total of 5 heat exchangers

3 Aerco Double Wall Steam to Water heaters for Domestic water (or similar)

2 Armstrong Heat Exchangers for VAV

2. Is the VA going to tie in the controls?

Answer:

Contractor will tie into existing controls

3. Is this project tax exempt?

Answer:

The tax code document has been included in Amendment 0002 to provide guidance to contractors on tax exemption.

4. Is there asbestos contained materials on the mechanical piping or hangers?

Answer:

No

5. How many linear feet of concrete needs to be poured for the equipment pad?

1250 Cubic Feet

6. Does a 3rd party inspector need to be onsite for testing of concrete or rebar?

Yes, for concrete testing

7. What steam pressure will be available at the control valve of the Steam to Hot Water unit?

30psi reducing to 15 psi

8. Who is the incumbent controls contractor at the facility?

Siemens

9. Is the contractor required to chemically treat the heating hot water system?

No

10. Please provide as-built drawings of the existing Heat Exchangers scheduled for replacement.

Answer:

Please see attached file name 2P3 Schedules-Plumbing, and 2-P6R Details & Diagrams Plumbing, and H-8R Schedules HVAC

11. Per Section A.4 of the Statement of Work, the contractor is required to provide a temporary water heater to support the existing system for the entirety of construction. To properly size and cost this requirement, please confirm:

Bid / deduct: It is recommended that contractor add the cost of a temporary heat exchanger in his price, however if the use of the heat exchanger is not needed the cost will be deducted from the final cost.

a. The peak hot water demand (GPM and/or BTU/hr) required to be supported by the temporary system OR provide as-built data for the existing exchangers that the temporary system must replicate.

Answer: 130 GPM

b. Whether the VA will allow defined outage periods (nights, weekends, or scheduled windows) where full hot water service is not required, in order to minimize temporary system size and cost.

Answer: Outage will only be allowed for switch over to tie into new system.

Preferably over the weekend to minimize impact on patient care.

12. What are the working hours?

Normal business hours are Monday through Friday 0800-1630. After hours can be coordinated through the COR.

13. What are the flushing and testing requirements?

Newly installed equipment will have to be flushed of any debri prior to putting into service.

14. In reviewing the Statement of Work, we noted what appears to be an inconsistency in the number of heat exchangers to be replaced:

a. Page 6 (Services, item c) states the contractor shall “demo total of 3 steam to hot water heat exchangers, steam traps, associated piping and controls.”

Answer: see answer for 14C

b. Page 11 (General Project Scope) also confirms the replacement of “3 existing domestic water heat exchangers.”

Answer: see answer for 14C

c. However, Page 12 (Build Framework for New Domestic Water Heat Exchangers) specifies “Demo of (2) existing shell and tube heat exchangers” and “Supply and Install of (2) heat exchangers.”

Answer: there are a total of 5 heat exchangers. 3 Aerco Double Wall Steam to Water Heaters for domestic water, and (2) Armstrong Heat Exchangers for VAV boxes.

Request: Please confirm whether the intent is to replace:

Three (3) total heat exchangers (two shell-and-tube units and one Aerco-type u-tube exchanger as described earlier in the SOW), or Only two (2) heat exchangers as listed in the framework.

Answer: there are a total of 5 heat exchangers. 3 Aerco Double Wall Steam to Water Heaters for domestic water, and (2) Armstrong Heat Exchangers for VAV boxes.

15. Are we to dispose/abate of any asbestos, lead, mold, or other hazardous material as part of this project? If so, provide appropriate hazardous material site survey report.

Answer:

There are no known hazardous material Please see attachment name: Bldg 2J Insp&MgmtPlan Final.pdf

16. What will the ICRA level be for this project?

This will be an ICRA level 4 due to falling in the high risk category of installing new hot water and heating water systems.

17. Are there any required/proprietary subcontractors the general contractor is to hire associated with this project?

Siemens for Controls

18. Will all work associated with this project able to be performed during regular working hours?

Please see question 12

19. It is our understanding that the Solicitation is a negotiated Bid (RFP) design-bid-build project with the Government's AE being responsible for the design portion (providing a full and complete set of Specifications and Plans) and the successful offeror being responsible for bidding and building the project based on the Specifications and Plans provided by the Government's AE. Put another way, the successful offeror will not be required to perform any design-build services as part of the contract - correct?

Correct

20. Are we required to provide a 24 hour/day on-site fire watch during demolition?

Based on requirements of hot work permit

21. Please confirm the following:

a.) Fire Suppression to be left in place as-is.

yes

b) Parts of the fire suppression are to be replaced. If so, please specify what is to be replaced.

Answer:

Not replacing fire suppression system

c) The entire fire suppression system is to be removed and replaced throughout the entire construction space.

Not replacing fire suppression system

22. Are there any construction drawings that will be released for the project?

No Construction drawings

23. Will the project be completed as a services, general construction, or special trade contract?

Construction

24. Is there any required controls work to be associated with this project? If so, please specify.

Yes tie new system into existing controls

25. What size of temporary water heater is to be provided to suffice the usage for the facility?

130 GPM