Amd0001_Attch7__Q A_BuffaloSwitchgear.pdf
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- Solicitation number
- 36c25920r0065
About this file
This document contains questions and answers related to solicitation number 36c25920r0065 for the replacement of basement switchgear at the Buffalo VA Medical Center. The opportunity involves removing existing transformers and installing new galvanized steel hollow metal doors and frames. The project location map confirms the work area can be fenced off. Only spare conduits need be installed in manhole 13, and the VA will assist with switching loads between sectionalizers during the work. The existing wall must be located for rebar prior to core drilling. Removed equipment will be disposed of by the contractor. The response includes a design to bury a new storm drain line for trench drain tie-in. Past performance can be evidenced by CPARS or questionnaires.
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Questions & Answers for RFP 36C25920R0065
Replace Buffalo Basement Switchgear (442-18-003):
1. Refer to Sheet AE101, Door Schedule. The material specified for both the door and frame is Hollow Metal, painted. Specification Section 08 11 13, paragraph 2.4 & 2.5 specify
Interior Door/Frame material as Stainless Steel.
a. Please confirm the doors and frames shown on Sheet AE101 are to be fabricated using standard steel, 16 Gauge.
(ANSWER 1) Hollow metal door and frame should be galvanized sheet steel minimum
Z275 (G90) coating.
2. Refer to Sheet AE101, Door Schedule. The door material specified is HM=Hollow Metal, not IHM=Insulated Hollow Metal. Section 7/AE301indicates that the door is “Insulated
HD HM Door”.
a. Please confirm the HM Doors are not required to be insulated.
(ANSWER 2) Per door schedule, they do not need to be insulated.
3. Refer to Sheet S-101, Foundation.
a. Please provide a copy of the soils report.
(ANSWER 3) See attached – Attachments 3 thru 6
4. Refer to Sheet S-101, Detail 6/S-101. The width of the stem wall is dimensioned as 14”.
KN #2 indicates “16” Wide Stem Wall”.
a. Please confirm the correct width of the stem wall should be 14”.
(ANSWER 4) The width of the stem wall is 14”. Key note 2 should indicate 14” and not
16”.
5. During the Site Walk, it was observed that the only way to get the existing transformers out of Electric Rm BL-95 is through an existing set of double doors.
a. Please confirm the existing transformers will fit through the existing double doors.
(ANSWER 5) Include oil removal and fin removal from transformers prior to removal.
Transformers may have to be tilted on side to be removed.
6. Refer to Sheet G-001, Project Location Map.
a. Please confirm the “Area of Work” shown on the map can be fenced in for the duration of the project.
(ANSWER 6) Confirmed
7. Sheet E-601 indicates “Spare” conductors into Man hole 13. This is not a typical installation. Typically we would install the pathways to the manhole and have the load-break connections for future.
a. Please confirm if we are to have spare cables left in MH 13?
(ANSWER 7a) Only spare conduits need to be provided where spare locations are indicated.
b. Please indicate any temporary provisions for connections leading onto other manholes/sectionalizer cabinets during the time the Sectionalizers 13a and 13b are de-energized? Sheet E-601 indicates re-connects of existing feeds to MH 6 and MH 10 to the new sectionalizer cabinets.
(ANSWER 7b) existing sectionlizers are separated into an A and a B feed. VA will assist is switching around campus for all loads to be removed from one sectionalizer at a time.
Intent is to maintain the existing feed terminations. Lift the old sectionlizer over the existing feeds and place a longer sectionlizer over the existing and new feeds.
8. Please confirm that DP-NHB1 is existing to remain?
(ANSWER 8) Confirmed
9. It is understood that temporary provisions must be provided by the contractor for outages that are expected to last more than 4 hours. Sheet E-601 Key Note 8 states to provide temp cable connections to NHP1 and Chiller 2 in 500 kcmil cables.
a. Please confirm 500cmil cables are required for NHP-1 (shown to be a 200a load)?
(ANSWER 9a) Bid 500 kcmil.
b. Please confirm what the intent of Key Note 8 is for bidding purposes.
CS called the Contractor to clarify --- Per the SOW since it is already identified for power to not be down for any longer than 4 hours – and anything greater --- than the 4 hours proper coordination is to be made to ensure power is provided.
- KTR is unclear as to why on E601 Note 8 it identifies the need for additional temporary power to Chillers 1&2 when the need to address the lose of power is already overall addressed within the SOW.
- Is there a reason the two chillers are specifically identified?
(ANSWER 9b) This should address contractor’s concern:
1. After NHB1 is energized, reroute the feeders for Chiller #2 and NHP-1 to Panel
NHB1. Chiller #3 will remain de-activated.
2. Existing (On-site) Emergency Generator(s) will power loads from NHB2 allowing deactivation of TF1CA2 and NHB2 when deenergized.
3. Two (2) chillers are required to run at all times. The third chiller to remain off until NHB2 is energized.
4. No other temporary power sources are required.
10. Please confirm if the existing wall will need to be x-rayed for structural rebar prior to being core-drilled?
(ANSWER 10) The existing bars shall be located prior to core drilling to ensure the bars are not disturbed per key note 11 on sheet S-101. X-raying the wall is an appropriate method to determine the location of the existing bars. Greg Gordon, S.E. Calibre
Engineering
11. Please confirm if there are any PCBs in the existing Transformers to be removed?
(ANSWER 11) There are no PCBs in the existing transformers.
12. Please confirm the NEMA rating of the existing transformers.
(ANSWER 12) Nema 1
13. Please confirm if all the removed equipment will need to be disposed of by the contractor?
(ANSWER 13) Confirmed.
14. Refer to Sheet AE101, KN #10 indicates to refer to Sheet E-102 for the trench drain tie-in to the storm drain. Sheet E-102 does not show any new storm drain work.
a. Please provide a design for any new storm drain work required.
(ANSWER 14) Storm Drain located approximately 35’ from leader location. Include in bid burying 6” storm drain line up to 4’ below grade for distance and connecting into existing storm manhole. Work to include patching asphalt at completion.
15. Can CPAR Evaluations be submitted in lieu of Past Performance Questionnaires?
(ANSWER 15) Past Performance submissions can consist of either CPARS evaluations and/or the Past Performance Questionnaires.
16. Requested - Site visit log from 7/10/20 <<< CORRECTION 06/10/2020
(ANSWER 16) Please see attached documents: Site Visit Attendance Sheet and Site Visit
Agenda (see Amd0001_Attachements 1 and 2)
17. Do the existing sectionalizing cabinets have spare terminals?
(ANSWER 17) No, the existing sectionalizers do not have any spares. The new sectionalizers that need to be provided under this project will expand the capacity of the sectionalizers to support the new transformer work.
18. CLARIFICATION - NAICS code for the Replace Buffalo Basement Switchgear?
(ANSWER 18) UPDATED to 236220, Commercial and Institutional Building
Construction
19. Provide a one line diagram for what the new gear is feeding?
(ANSWER 19) Single Line drawing is provided on Sheet E-601
(last question – total of 19)
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