36C24220B0036-0001001.pdf

QUESTIONS AND ANSWERS – 36C24220B0036 – AMENDMENT 0001 (ANSWERS IN RED)

1. Please note that the drawing list in the specifications includes drawing 15.AD101, but the drawing list on the drawings and the drawing set does not include this drawing.

Please confirm that drawing 15.AD101 is part of this project, and if it is, please issue this drawing

Response: “Drawing 15.AD101 is NOT part of this project. Disregard all reference to Drawing

15.AD101 in the contract documents.”

2. Paragraph 1.3. A thru C Statement of Bid item(s in)Specification Section 01 00 00(General requirement) states Base bid, Alternate 1 & Alternate 2 respectively but whereas Bid sheet (Page

7 of 46) of the solicitation document includes Item 1 Base Bid only. Please let us know which is correct.

Response: Page 7 of the solicitation is correct, please ignore specification 010000 section 1.3.

3. a )Line 3 of Keyed Note 1 in bid drawing #13.ES101(page 17 of 42) states to “provide above ground diesel fuel tank & concrete pad per detail C1 & C2 on drawing E002 and specification” but there is no specification or drawing showing the detail of the above ground diesel fuel tank. Please provide the detailed specification & drawings for this above ground fuel tank along with detailed layout for supply & return fuel lines between the new generator day tank

& this new above ground storage tank.

b) Key note 9 of above drawing: Please provide the detail of the temporary generator (capacity of generator/day tank capacity & approximate duration so as to enable bidder to account this cost in the bid.

Response to 3a: The basis of design for the above ground deisel fuel tank shall be the Petro

Hopper model manufactured by Highland Tank. The tank shall be 1,000 gallons. The inner tank diameter shall be 84”, outer tank diameter shall be 90”, and the overall height of the tank shall be 64”. The tank shall contain an inner and outer tank. The tank shall meet UL 142. The fuel oil tank shall be factory painted white in color. Approved equal to that listed in the basis of design shall be based on approval of VAMC and A/E. Refer to pictures and cut sheets below.

The contractor shall route rigid conduit with Glass Fiber Reinforced Plastic (FRP) within concrete cell-duct system underground from fuel oil tank to Boiler Plant (Approximately 450 yards). The contractor shall include ground penetrating radar in bid. See specification

231000/2.4/C/1-3 for additional information. The conduit shall be designated for monitoring and no other disciplines shall be permitted within conduit system.

The contractor shall route rigid conduit with Glass Fiber Reinforced Plastic (FRP) within concrete cell-duct system underground from fuel oil tank to Building No. 3 (Approximately 250 yards). The contractor shall include ground penetrating radar in bid. See specification

231000/2.4/C/1-3 for additional information. The conduit shall be designated for monitoring and no other disciplines shall be permitted within conduit system.

The fuel lines between the main fuel storage tank and the generator shall be double wall piping.

The routing of the fuel lines is the responsibility of the contractor to coordinate at site. See attachment 231000 (Facility Fuel Oil Systems) for additional information.

Response to 3b: The size of the new permanent diesel generator is 600KW / 750KVA. The size of the new above ground desiel fuel tanl serving the new generator is approximately 1,000 gallons. The temporary generator and associated day tank shall be the responsibility of the contractor to provide. The construction documents are detailed as to the scope and general guidelines for phasing. It is the Contractor’s responsibility to take this information and do a detailed phasing plan and determine the specifics for the temporary generator (size, fuel supply and duration determined by the contractor to be necessary to perform the scope and all work as specified and detailed on the contract documents.

4. Paragraph 2.5.D.2 (fuel piping system) of specification section 26 32 13 for Engine Generator states “ to provide necessary valves & gauges on supply & return line from the day tank to underground Storage tank” please clarify whether there is an existing underground diesel fuel storage tank if so please provide details/location of this tank & detail /routing for the new fuel lines (Supply & return).

Response: There is NO existing underground fuel tank. The new generator fuel storage tank to be installed under this contract shall be above ground. Any reference to an “Under Ground” fuel storage tank should ignored.

5. Note 11 on drawing 13.ES101 & Note 19 on drawing 13.EP502 indicate new 1200A, 3p, 4W

MTS (Manual Transfer switch) with quick connect outdoor. Please provide specification for this MTS.

Response: The contractor shall provide manual transfer switch (MTS) per note No. 11 on drawing 13.ES101.

6. Drawing 13.EP502 one line drawing shows ATS#EQ as 600A rated but whereas ATS schedule on the same drawing shows ATS#EQ as 800A rated. Please let us know which is correct.

Response: A 600amp ATS (Automatic Transfer Switch) is correct.

7. Drawing 13.EP502: Please provide panel schedule for following replacement/New Panels:

B-13-ATTIC-P1 208/120V, 3P, 3W, 225A MLO

B13-G-20 208/120V, 3P,4W 100A main MCB

B13-G-3-LS 208/120V 1P,3W, 60A main MCB

Response: See panel schedules included in this document.

8. Bid drawing 13.ES101 keyed notes 2,4,5 and 12: Please provide the trench details for the above noted underground electrical feeders.

Response: The installation of feeder conductors within trench is a means and methods contractor installation issue. Install per notes No. 2, 4, 5 and 12 on drawing 13.ES101.

9. Bid specification division 16 section 260573 over current protection device coordination study. Is this study for only overcurrent protective devices installed under this project.

Response: The contractor shall provide overcurrent protective device coordination study described within section 1.1.A-D of specification 260573.

10. In the specifications 263213-8, it states a 96 hour day tank is required to be fed via a remote main storage tank. On drawing 13.ES101, Keyed Notes #1 states an above ground diesel tank. If a 96 hour tank is furnished as part of the enclosure sub base, will this be acceptable.

Response:. Disregard all mention of “a 96 hour day tank” in the design documents. The new generator shall be fed from one (1) above ground main diesel fuel storage tank which shall sit on its own concrete pad as shown on the contract drawings. The basis of design for the main diesel fuel storage tank shall be the Petro Hopper model manufactured by Highland Tank. The tank shall be 1,000 gallons. The inner tank diameter shall be 84”, outer tank diameter shall be 90”, and the overall height of the tank shall be 64”. The tank shall contain an inner and outer tank.

The tank shall meet UL 142. The fuel oil tank shall be factory painted white in color. Approved equal to that listed in the basis of design shall be based on approval of VAMC and A/E. Refer to pictures and cut sheets included in this document for additional information.

11. On drawing 13.EP502, it states to provide generator enclosure. However, specifications does not have any verbiage on it.

Response: The generator enclosure shall be Walk-In Style, weather proof, sound attenuated for

Level II.

12. Drawing 13.EP501 single line diagram (Existing Condition):

Please provide more detail of existing unit substation / SWGR B13.MDPB & copy of previous

SC study for the gear / facility (If available).

Response: Building 13 is currently served with an interior 15KV – 208Y/120V, 3-phase, 4-wire substation type transformer with adjacent Main Distribution Switchboard B13.MDPB rated at

1200A, with a 1000A setting on the Main Circuit Breaker. This information is shown on

Drawing 13.EP.501 Building 13 single line drawing (existing condition). Additional photos are included.

The previous SC study will be made available to be viewed by the contractor on station after award.

13. Bid drawing 13.ES101 Building 13 Electrical utility site plan New: Keyed Note 9 (for temporary generator) line3 & 4 state that “Contractor to provide all necessary testing & inspection including documentation as per NFPA” please clarify whether this test & inspection to be performed @ site or off site.

Response: NFPA 99(12), Sec. 6.4. 4.1. 1.4(A), requires that emergency generator sets be tested

12 times a year, with testing intervals of not less than 20 days nor more than 40 days.

14. Bid drawing 13EP.502 Building 13 Single line diagram New work: Please provide feeder details between New Panel B13-LS & New Panel B13-G-3-LS

Response: Please refer to New Feeder Schedule ident No. “60” on drawing 13.EP502.