Q and A HC102825R0076 Part 2.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 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?

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.

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?

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?

During the period of time that some old CRACs remain and some new CRACs remain, is it permissible for the new CRACs to be operated in “manual” mode, i.e., not integrated into the control systems? This would facilitate a controls integration after all new CRACs have been installed

Please confirm cooling capacity of existing CRACs is comparable to that desired in the new CRACs and that existing piping is sufficiently sized for reuse.

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

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.)

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?

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?

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

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