16-1019C_RFI.pdf

DEPARTMENT OF THE AIR FORCE

30TH SPACE WING (AFSPC)

GUARDIANS OF THE HIGHER FRONTIER

Contract No. FA4610-18-R-0012; XUMU 16-1019C, Install A/C at Youth Center Building

16170 – Request for Information (RFI)

1. Question: Can The QC Manager, SSHO and Superintendent be one person?

Government Response: Per Statement of Work paragraph 2.8.1 “The SS [ Site

Superintendent] and the QCM [QCM] shall be two separate individuals…”

2. Question: Will a third party Commissioning Agent be required?

Government Response: Per Specification Section 23 05 93 “The TAB Firm must be a prime subcontractor of the Contractor and be financially and corporately independent of the mechanical subcontractor, reporting directly to and paid by the Contractor.”

3. Question: Will a third party Fire Protection Engineer be required?

Government Response: A Fire Protection Engineer is not required.

4. Question: Please provide LBP/ACM survey for this project.

Government Response: No LBP/ACM survey are available as the building was built post 1990.

5. Question: Please provide sign in sheet from site visit.

Government Response: Sign in sheet has been posted to FBO

6. Question: Is there any As built Drawing available for this building?

Government Response: Available as-builts have been added to FBO.

7. Question: 2.2 General description (7) states install new duct insulate on all existing ductwork.

Q. Is there duct insulation on the existing supply and return ducting now ?

Q. please provide ceiling types (acoustical tile or drywall hard lids) for all rooms.

Government Response: In the gym there is no insulation on both supply and return, it has one AHU. The other two AHUs have insulation on the return duct inside of the mech room, none on the supply. In the bldg. though the supply ducts are insulated. The classrooms have attic return so there is no duct work going back to the mech room. On the lobby side there is a return duct, but the walls are sheet rock so we can’t tell if the return is insulated. The supply duct is insulated on the lobby side.

8. Question: How much of the ductwork shown on sheet M-103 is existing ?

Government Response: All ductwork shown is existing. Project only requires new ductwork be installed to reconnect air handlers.

9. Question: Are there manual balancing damper at the existing supply and return branch lines for balancing purposes ?

Government Response: There are balancing dampers on the supply ducts on the classroom side, there marked with orange long tags. None on the AHU in the gym but the diffusers can be open and closed. None on the other two mech room AHUs or the one for the kitchen.

10. Question: Will Duct Air Leakage Testing be required on the existing and or new ductwork ? (Check spec)

Government Response: Per Specification Seciton 23 00 00 “Perform ductwork leak test on the entire air distribution and exhaust system, including fans, coils, filter through Class

2500 Pa (10 inch water gauge).”

11. Question: Specifications Section 26 00 00.00 20 – Basic Electrical Materials and

Methods:

a. § 1.4 - Electrical Characteristics; “Electrical Characteristics for this project shall be 12.47 kV primary, three phase, three wire, 60 Hz, and 480/277 volts secondary, three phase, four wire. …” upon review of the Single Line Diagram(s) on Plan Sheet(s) ED-601, E-602, and Panel Schedules on Plan Sheets E-604 & E-

605 Shows that all existing distribution equipment is not being replaced but is

120/208 volt, three phase, four wire, 60Hz. Is it the intent to replace the complete front end service equipment to 480/277 volt, three phase, four wire, 60 Hz as stated above?

Government Response: Specification section 26 00 00.00 20 detail the basic electrical material and methods, contractor shall follow the 100% drawings specification and notes for the equipment and material to be replaced.

12. Question: Specifications Section 26 08 00 Apparatus Inspection and Testing:

a. § 1.4 Quality Assurance; 1.4.1 Qualifications “Contractor shall engage the services of a qualified testing organization to provide inspection, testing, calibration, and adjustment of the electrical distribution system and generation equipment…” It would be normal practice that we would have NETA Testing on

Distribution/Branch Circuit Breakers 100 Amp and Larger. Is it the Governments position that the entire distribution system is to be Tested? Please provide

Clarification.

Government Response: Specification 26 08 00, 1.4.1 specified that contractor needs to hire a qualified organization for testing the electrical system, contractor shall follow the

100 % design drawings

13. Question: Please Clarify the type of Junction Boxes and Disconnect Switch Enclosures to be used Outside the Building at this project. Will NEMA 3R Enclosures be accepted

[Sheet Note #2. On E-102 & Sheet Note #3 & #4 on Plan Sheet E-602]] or will NEMA

4X (Stainless Steel) be required as the base in next to the ocean?

Government Response: Contractor shall follow the 100 % drawings details and notes, NEMA 3R enclosures are accepted.

14. Question: Please Clarify the feeder Ground for the (N) Chiller Circuit called out on Plan

Sheet E-102 & E-602 Should have a 1#1/0 GND and not 1#1/10 GND?

Government Response: Contractor shall follow the description from drawing E-602, 1#1/0, disregard 1#1/10.

15. Question: Please Clarify the Type of wire that will be acceptable for this project: Per

Section 26 05 00.00 40 Common Work Results For Electrical; § 2.1.3 Wire and Cable, Calls out specifically ‘XHHW for conductors installed in conduit. On Plan Sheets E-102, E-602, and Specifications Section 26 20 00 Interior Distribution System § 2.5.3

Insulation Calls out either THWN/THHN or XHHW. What Type of Wire Insulation will the Government Accept?

Government Response: Per clause 52.236-21 “In case of difference between drawings and specifications, the specifications shall govern.”

16. Question: On Plan Sheet E-102 (N)DS-CH1 600A, 3P, WP. On Plan Sheet E-602 (N)

DS-CH1 is Called out to be 800A, 3P, WP. Please Clarify the Size of the New Chiller

CH-1 Disconnect Switch.

Government Response: Contractor shall install an 800 A disconnect switch. Follow the sheet note #3 of sheet E-602

17. Question: On Note #2 on Plan Sheet E-602; Is the Breaker a Spare and can be used as shown? Or is the Breaker Space a Prepared Space with a Preinstalled Frame that we can utilize for the installation of a (N) 800 Amp Frame Molded Case Breaker? Please

Clarify.

Government Response: For bidding purpose assume the breaker is a Spare and can be used, the preparation to be done by Contractor.