Questions and Answer SDC.pdf

MCC SAN DIEGO – REPLACE BOILERS

PROJECT 6D9T QUESTIONS & ANSWERS

SOLICITATION 15B61021B00000002

SUBMITTED BY SOPH CONSULTING, LLC:

1. The amount of time to complete the boiler replacement project at MCC San Diego is 378 days, correct?

CLARIFICATION: Correct, The performance period is 378 calendar days after issuance of the notice to proceed.

2. As the prime contractor, will my small business company (SOPH Consulting, LLC) hire R.F. MacDonald Co. which is a large company as a subcontractor to complete the boiler replacement project?

CLARIFICATION: Please see FAR 52.219-14(c)(4) for Limitations on Subcontracting.

SUBMITTED BY EMCOR SERVICES:

3. Please confirm that the existing automation system is supervised by a Tridium/Niagara based Supervisor or Jace.

CLARIFICATION: The existing automation and control system has a central supervisory workstation that is open protocol.

4. Are we to reuse the existing main flue piping.

CLARIFICATION: Per M1.1 – demolish existing flue.

5. Was there a volume tank in line and if so, what size.

CLARIFICATION: There is no existing volume (storage) tank. The existing system has an expansion tank at the heat exchanger shown on M1.1 note 8.

6. Please provide the temporary hot water pump gpm and tdh.

CLARIFICATION: 300GPM/85FT

7. Please provide the Gas PSI for the temporary boilers.

CLARIFICATION: Camus MicoFlame 2mbtu Hot Water Skid – gas pressure = 11INW or Camus 3mbtu MicoFlame Series 2 Combined Hot Water Skid – gas pressure = 14INW

8. On the drawings, what is meant by HXR. What size is the HXR?

CLARIFICATION: HXR(Heat Exchanger Return) 6” pipe.

9. The new boilers power requirements on M0.2 B1,B2,B3 schedule says 460/3/60 and also lists the control circuit as 120/1/60. Are the boilers a single point of connection for 460v and they have a built in transformer or do they require a separate 120v circuit for the controls?

CLARIFICATION: Single point power connection. No separate 120V control circuit required.

10. On E2.2 it shows the temporary boiler power conduit going to PNL-L1 which is a 208/120v panel with (1) ¾”(RGS) with 3#12+1#12GND but on E2.3 Keynote 3 it says the temporary power goes to PNL-H2 with (3) ¾”(RGS) with 3#12+1#12GND. Please clarify.

CLARIFICATION: The temporary boilers are 120V or 208V depending on the available equipment from the rental company (TBD)when the construction starts. However, the power provided on Sheet E0.1, Panel “L1” schedule is 20A, 120V based on the “BT1” thru “BT4” equipment schedule on Sheet M0.2 The 120/208V power will serve the gas blower fans. The power will be derived from existing power panel “L1” as shown on the drawing. Provide the required branch circuit breakers which will be determined later. The circuit breakers shown on “L1” is subject to change as to quantity, ampere ratings and branch circuit conductors/conduit required to match the available equipment. Keynote #3 on Sheet E2.3 was the earlier version but was not revised after the equipment revision at the last minute.

11. Please clarify what detail 4 is representing on E3.1 because it doesn’t match anything else from the prints. It shows 240V and new equipment is 460V.

CLARIFICATION: Detail 4 was the part of the initial scheme in providing power for the intended boilers and should have been deleted in the review submittal.

But yes, the power for the new boilers is 460V, 3-phase as shown in the boiler equipment schedule on Sheet M0.2.

12. Please clarify keynote 2 on E1.1 because we did not talk about these pumps on the job walk and they are heating hot water not domestic hot water. Where is the source of their power?

CLARIFICATION: Yes, they are Hot Water Heating Pumps as shown on Keynote #7 on Sheet M1.1. The power is derived from existing power panel “P1” as shown on Sheet E1.1.

SUBMITTED BY SPECTRUM SERVICES GROUP, INC:

13. The is no specification for Heating Hot Water Piping or Boiler Water Piping in the provided Hydronic Piping specification section 232113:

a. Can a specification please be provided for Heating Hot Water Piping or Boiler Water Piping?

CLARIFICATION: updated specification section to add Hot water heating piping, makeup water and blowdown water

14. Project Note 3/M0.1 states that all Heating Hot Water Piping shall be Type L Copper Tube with 15% Silver Solder Joints, normally schedule 40 steel piping is acceptable for pipe sizes 2.5” and larger:

a. Please confirm that all Heating Hot Water Piping / Boiler Water Piping can be installed using schedule 40 steel piping for sizes 2.5” and larger.

b. Please indicated whether grooved fittings will be acceptable for Heating Hot Water Piping Systems.

CHANGE: updated Part 2 – Products of the specification section to add Hot water heating piping, makeup water and blowdown water

15. No specification is provided for the Temporary Heating Hot Water Piping:

a. Please provide the specification or required material types for the Temporary Hot Water Piping Systems.

b. Will temporary flexible hoses be acceptable for use on temporary water piping systems.

c. Will flexible gas piping be acceptable for use on the temporary gas piping systems?

CHANGE: updated Part 2 of the specification section to add Hot water heating piping, makeup water and blowdown water. Add 2.2/L Temporary System Piping.

16. Should we assume that system shutdowns will occur after normal working hours?

CLARIFICATION: All system shut downs will be addressed on a case by case basis.

17. How many escorts should we plan on being provided to escort our personnel each day?

CLARIFICATION: One escort will be provided daily. Additional escorts will be determined on a case by case basis.

18. Based on the guards work schedule should we assume we can get in a full 8-hours of work each day?

CLARIFICATION: 7 hours, Due to processing procedures.

19. What should we assume for the daily work schedule (start time, stop time & duration)?

CLARIFICATION: 6 am – 2 pm With 30 min of processing time on each end of the shift.

20. How much time should we plan on for security check-in and check-out each day?

CLARIFICATION: 30 MINUTES AT THE BEGINNING AND END OF THE DAY

21. Please confirm there are no ACM’s or PACM’s (Asbestos Containing Materials or Presumed Asbestos Containing Materials) on the mechanical systems.

CLARIFICATION: MCC San Diego, Cannot confirm there are no ACM or PACM materials on the mechanical systems

22. Please confirm if there are ACM’s or PACM’s that the mechanical contractor will not be responsible for testing or abatement of these materials.

CLARIFICATION: The contractor will be responsible for testing and abatement of all materials ACM or PACM