Q and A HC102825R0076 Part 3 Full.docx

No.

6.5.1.2 in the RFP.

Please reference attached Specifications

Will the contractor have access to DISA’s short circuit study prior to award?

Yes. Study will be provided after award in EasyPower 11.0 format.

Is there a climate-controlled storage space on NSA Mechanicsburg that would be available for new CRAH, PDU and RDU units to be stored until the new units are ready to be installed? Since the CRAH units can only be brought down a few at a time, climatized staging and storage will be necessary to ensure that the project schedule will not be delayed.

If not, should the bidders price in climatized storage off base for the units into the proposal?

Climate controlled space is not available. There is limited warehouse space that is heat only and does not have cooling or humidity control. Warehouse space does not have a loading dock. DISA cannot assist with off-loading or delivery of equipment to building 308.

CRAH units at one time?

Only one unit at a time can be removed from service.

How long do we need to build into the project schedule for ASI’s?

Example MOP will be provided in response.

ASI (HAZCON) notification should be planned with a minimum 30 calendar day notification period to allow for DISA coordination.

Since the new CRAH units require dual feeds, is it the intention of the Government that all of the new CRAH units will receive 2 brand new feeds to include circuit breakers, EMT conduit and wire?

Yes. Reference drawing E-601B for additional CRAH circuits.

With the installation of 14 new CRAH units placed into the system, is it only a requirement for TAB of the mechanical system and commissioning of the controls portion of the project? On previous DISA programs, Independent 3rd party commissioning for the entire mechanical system was required.

Should the contractor along with pricing in TAB also price in 3rd party independent commissioning for the mechanical system? If so please update the specifications to include what is required for the overall commissioning of the mechanical system.

Yes, it is the requirement for TAB of the mechanical systems and commissioning of the integrated controls. No independent 3rd party commissioning has been identified in the PWS and no pricing should be included. Continuous functional performance testing is necessary to ensure operation of new equipment.

As part of the TAB requirements, integrated systems testing with all modified equipment under this PWS is a requirement.

Recommend using ASHRAE 202 as a reference for any testing/commissioning.

· Operational condition of identified equipment

· Any existing deficiencies prior to replacement

· All deficiencies related to integrated controls and alarms of existing identified equipment

The solicitation states that there will be no pre-bid walkthrough for this project. Will there be a change order that happens after contract award once the winning bidder has an opportunity to field verify that demolition work on sheet MD100?

Bid should be consistent with what is on the drawings and in the SOW. If unforeseen conditions occur, we will evaluate if a mod is needed at that time.

Does the site have sufficient laydown space for all new CRAC units? The manufacturer will deliver all CRACs together. The contractor is only allowed to swap one CRAC at a time. Can the site support temporary storage of the new CRACs as they are incrementally installed? If not within the building, can a Connex be located adjacent to the building?

Yes, there is limited warehouse space that is heat only and does not have cooling or humidity control. Warehouse space does not have a loading dock. DISA cannot assist with off-loading or delivery of equipment to building 308.

· Other 2 CRAH = 9’5”

· Lowest door height 7’8” without removing any hardware

2nd Fl – Ceiling = 9’5-1/2”

· Front door (single door) 7’7” without removing hardware

· Rear Doors (double with removable mullion) = 7’7”

· There are 2 cable trays that could cross the entry path from the Rear Doors. One is 7’9” and the other is 7’3”

Correct, the in unit smoke sensors are redundant and do not need to be connected to building system

Please confirm RAF height for all CRACs to suitable size CRAC stand height.

24 inches

Regarding CRAC electrical feeders. Please confirm it is DISA’s intent that all existing feeders be completely demoed, and new conduit, junction boxes, fittings and wiring be installed for both new feeders for each new CRAC. (I.e., the contractor is not allowed to re-use any existing infrastructure.)

Existing CRAH circuits (wire) shall be removed. Drawing ED-102 Plan Note 1 only requires demo of wire. Note requires new circuit breaker. Existing conduit and fittings can be reused if size allows new CRAH circuit wiring. Additional new feeders for new second CRAH unit feed will be new.

Is the contractor responsible for cutover of the branch circuit wiring from the old PDU to the new RDC? If so, how many / what size circuits exist. Is splicing allowed if the existing wiring is too short?

Referencing Plan Note 1 on ED-106. Intent is to remove existing branch circuit and remove PDU. Drawing E-106 empty cloud indicates placement of RDC that will support circuits removed from PDU_2-B-30. This will change circuits to an “A” source.

No “New Work” One-line was provided for UPP-A-1 and UPP-B-1. Are the same 400A breakers to be reused for new PDUs A-28 and B-28? Can feeders (conduit and wire) from Room 116 to the PDUs be reused? Can the breakers in UPP-A-1 and UPP-B-1 be reused?

No. Intent of PDU replacement is to install new feeder breaker and wire. If conduit exists for older feeder, it can be used if sizing meets NEC requirements.

Please confirm that electrical feeders crossing into Room 217 only need dielectric breaks and not RF filtering.

PWS requires following ICD/ICS 750. Only dielectric breaks. No RF filtering.

Is contractor permitted to de-energize EPO control panels for modifications?

Yes. Notification of status should be provided.