21R0014 - B570 - Pre-Bid Questions and Answers_Revised.pdf

FA4418-21-R-0014 Repair Maintenance Facility Hangar B570

Pre-Bid Questions & Answers – Revised 27 Jul 2021 (See Pg. 4 & 5)

Q1. For the CCUs, the AHU, and the HVUs, do all of the control sensors need to be explosion proof? Or only 120V higher?

A1. Yes low voltage requires explosion proof enclosures.

Q2. Will the control valves for HW and CHW need to be explosion proof rated, or enclosed?

A2. All low voltage controls (actuators) for valves shall require explosion proof enclosures.

Q3. Will any devices in Mechanical Room 115 shown on M-103 need to be explosion proof?

A3. No

Q4. There is a note for the HVUs that the units need to be built with explosion proof construction. Do the CCUs and AHU need this as well, or only the electrical components on them?

A4. All power devices within hangar shall be in explosion proof enclosures.

Q5. For the CCUs, there is a note on M-101 that asks for an LED interface to control the units. That interface will not be able to be explosion proof. Will it be acceptable to install the LED interface inside an explosion proof enclosure that will need to be opened for access?

A5. Yes

Q6. We (VFD manufacturer) don’t have any options for mounting VFDs in an explosion proof enclosure. Electronics and flammable vapors don’t play well together. Can you see if the VFDs can be located outside of that environment?

A6. VFD’s are available in a NEMA 7 ventilated explosion proof enclosure. Cordyne is one manufacturer.

Q7. Will a free zone letter be provided so we can access the Bldg. from the flight line?

A7. The contractor will be allowed access per Drawing Sheet G-002 and as described under Spec 01 11 00, part 1.6, Spec 01 50 00, part 2.2 for protection of haul routes and 3.5.4 for storage area requirements. The area surrounding the building will be barricaded away from the flight line. Access to the building can be achieved directly from the street through a large hangar door. The awarded contractor will be given a fee zone authorization letter signed by a senior, Joint Base Charleston manager.

Q8. Sheet F-003 Detail 2 shows a foam inductor being installed. Is there adequate pressure for any loss that may happen with the installation of this item?

A8. A forthcoming addendum will address this issue.

Q9. Spec Section 21 13 25 Para 1.3.7 states “There are four 2,500 GPM diesel driven fire pumps taking supply from two aboveground water storage tanks” Are these pumps Diesel or Electric?

A9. The four fire pumps in B516 that feed B570 are electric driven Fire Pumps.

Q10. With the volatile supply market will there be any adjustments available for material cost increases if contract is not awarded for 180 days?

A10. No. Proposals are required to be valid for 180 days from the response date. If an award is anticipated, but not made within the 180 days, the Government will allow the apparent awardee an opportunity to extend its proposal expiration date. The Government may also choose to cancel the solicitation and resolicit, if changing economic conditions warrant it.

Q11. Is the current Fire Alarm/Mass Notification system under a specific maintenance or service contract? If so, please provide the contact information for this contractor to eliminate a conflict in service agreements while renovating this facility.

A11. This will be coordinated after notice to proceed.

Q12. Please provide the location where the existing shut-off is for the Fire Suppression.

A12. Control valves for the existing foam system and the wet-pipe sprinkler system can be found in Foam Equipment System Room 113. Refer to Sheets FD103 and FD104 Detail 2 for valve locations.

Q13. Spec 01 57 50 Para 3.4.1 states “The contracting office has obtained a Land Disturbance Permit from SCDHEC and an approved Storm Water Pollution Prevention Plan (SWPPP). A copy of this permit and approved SWPPP will be provided to the contractor after award.

A13. Above portion (3.4.1) should be removed from 01 57 50 spec section. Site permitting requirements of the contractor shall meet section 01.11 within SPEC 01 57 20.00 31 (a).

Q14. Spec 01 57 50 Para 3.6.1 states to equip dumpsters with a secure cover and paint the standard base color. Keep cover closed at all times, except when being loaded with trash and debris. Are all dumpsters going to require covers at all times? Are all dumpsters going to be required to be painted a certain color? If so, please provide the specific color requirement.

A14. Dumpsters located within the IMC Area (Flight line area) will require covers.

Dumpsters do not have to be painted a certain color.

Q15. Sheet G-003 Contaminated Soils states “ANY SOIL TO BE REMOVED FROM THE SITE SHOULD BE EXCAVATED, CONTAINED IN 55-GALLON DRUMS OR PLASTIC-LINED ROLL-OFF BINS, COVERED, LABELED WITH HOLD PENDING ANALYSIS STICKERS, AND STORED ON BASE UNTIL THE SOIL HAS

BEEN SAMPLED AND CHARACTERIZED. A COMPOSITE SOIL SAMPLE SHOULD BE COLLECTED FROM

EVERY ROLL-OFF BIN (OR ONE COMPOSITE SAMPLE FROM EVERY FIVE 55-GALLON DRUMS) AND

ANALYZED FOR VOCs.” Will an estimated quantity of contaminated soil be provided?

A15. CLIN 0002 is provided in the solicitation documents for this work. Please reference Section

B.

Q16. Drawing notes state Flooring shall receive striping to match existing. Will the existing striping layout be provided?

A16. The contractor will measure and verify existing markings and restripe in the same locations.

Q17. Sheet S-001 Structural Steel note 10 states all exposed structural steel shall be primed and painted. Does this only apply to new steel? Does all the structural steel in the whole facility get painted?

A17. The note pertains only to new steel.

Q18. Section 09 90 00 Para 1.4.2 SSPC QP 1 Certification All contractors and subcontractors that perform surface preparation or coating application must be certified by the Society for Protective Coatings (formerly Steel Structures Painting Council) (SSPC) to the requirements of SSPC QP 1 prior to contract award, and must remain certified while accomplishing any surface preparation or coating application. If a contractor's or subcontractor's certification expires, the firm will not be allowed to perform any work until the certification is reissued. Requests for extension of time for any delay to the completion of the project due to an inactive certification will not be considered and liquidated damages will apply. Notify the Contracting Officer of any change in contractor certification status. Does this include the interior gyp board painting?

A18. This applies to the specialty coating applications only.

Q19. Spec Section 23 64 10 Para 2.1 States “Materials and equipment will be standard Commercial cataloged products of Trane Company. Is Trane the only mfg. that will be accepted?

A19. Trane chillers are required.

Q20. Can further detail be provided for the reconnection to the existing boiler?

A20. Pipe reconnection is within hangar; no new connections to boiler are required.

Q21. Sheet M-001 Ductwork Construction and Leakage Testing Schedule has a column for notes.

Each line states note 1. What does note 1 represent?

A21. Note added and reads as follows: 1. TEST IN ACCORDANCE WITH SPECIFICATION UFGS

23 05 93, TESTING, ADJUSTING, AND BALANCING FOR HVAC AND THE PROCEDURES IN

SMACNA HVAC AIR DUCT LEAKAGE TEST MANUAL. ALL DUCTWORK SHALL BE TESTED.

Q22. Are alternate manufacturers acceptable for the Epoxy Resinous Flooring?

A22. Other products may meet specification requirements. Up to specification's date of issue, previously tested materials in Table II of Specification 09 67 23.16 met specification requirements. It is the offorer's responsibility to confirm previously tested material formulations have not changed and specification requirements will be met.

**Polyspec T-2235SL sealant may be used. Alternate manufacturers may be acceptable for the Epoxy Resinous Flooring as long as they meet Specification 09 67 23.16 PART 2.

Q23. I have 3 SC Roofing Contractors who would like to visit the site before supplying a bid number.

A23. If additional site visit requests are received, another group site visit may be scheduled in

July.

Q24. “.. would like permission to supply a PVC bid number as an alternate, Sika/Sarnafil and our Sarnafil

PVC Membrane is an approved manufacture of the DOD and USAF, … can provide supporting documentation if requested.”

A24. Propose to comply with the posted Contract Documents.

Q25. The mechanical drawings do not specify the class/div ratings. We found this note on the electrical drawings, note 3. Are we safe to assume this extends to the mechanical equipment as well? Also, can you please clarify what the Group and T-Code is?

A25. Class 1, Div II Ratings shall be used

Q26. Will we there be a required 3rd party certification of the explosion proof ratings?

A26. Submittal process will verify class and division ratings. Equipment shall be labeled with rating.

Q27. HV-4, VF-10, and EF-D-1 are not in the hangar area but still has the note that it needs to be explosion proof. There is a big cost difference between explosion proof and not, so if it does not need to be explosion proof, can that be clarified?

A27. All equipment in hangar area shall require class 1, div II rating. Equipment not in hangar areas do not require explosion proof rating.