S05_RFI 2 Tracking Log 673_22_109 DB Install Fan Array AHU OR 2_7_Final.docx

Request for Information (RFI) #2

D/B Install Fan Array AHU OR 2-7 & Replace Exhaust Fans Project 673-22-109

Response

VA Response: No, power exhaust is not to be replaced

VA Response: N/A

VA Response: N/A

VA Response: Yes

VA Response: A pre-TAB will need to be completed so a previous TAB report is not relevant

VA Response: A pre-TAB will need to be completed so a previous TAB report is not relevant

VA Response: HEPA filters will be replaced by facility prior to work commencing. Contractor will be responsible for replacing filters after work is completed and prior to final TAB

VA Response: Yes

VA Response: ISO EF LAB 1 EF LAB 2 and LAB 3 serve hoods in “new” main lab. The small ISO EF 144 serves the Morgue. EF OR1 and EF OR2 serve the ORs. The replacements for these fans will need to meet current requirements for these areas. Site investigation will need to be conducted by contractor to confirm.

VA Response: Yes. HEPA filters will be replaced by facility prior to work commencing. Contractor will be responsible for replacing filters after work is completed and prior to final TAB

VA Response: ISO EF LAB 1 EF LAB 2 and EF LAB 3 serve hoods in “new” main lab. The small ISO EF 144 serves the Morgue. EF OR 1 and EF OR 2 serve the ORs. Field verification will be necessary. Additional EF information provided

VA Response: Yes. A system site survey of equipment shall be conducted by contractor.

VA Response: The portion of the chiller replacement project in the area has the following scope as it applies to OR2-7:

– Remove existing 80 ton York chiller and modify structure as required to accommodate new chiller footprint

– Provide and install 80 ton York air cooled chiller

– Reuse existing electrical service and tie into new disconnect

– Remove all system components within pre-engineered metal building to make room for new pumps and electrical components

– Provide and install new buffer tank with insulation and aluminum jacketing

– Provide and install structural support to accommodate tank

– Provide and install new dedicated and redundant base mounted pumps with associated VFDs to be located within metal building

– Reconfigure piping to ensure chiller is dedicated to AHU 2-7 only

– Reinsulate piping as required to match existing insulation

– Provide and install new isolation valves, temperature and pressure gauges to match existing

– Connect all new components into the JCI BAS

– Create program switch over to CEP or dedicated chiller in the event of failure

– Commission chilled water system

– Provide a pre and posttest and balance to verify performance.

VA Response: Yes

VA Response: Yes, they shall be upgraded to the latest available tech

VA Response: Yes

VA Response: As work will be coordinated with affected services, a temporary unit will no longer be needed. SOW has been revised accordingly. The government will consider extending the PoP as a zero-cost time extension as needed due to lead times.

VA Response: Yes, see response to RFI 17. Work must be scheduled with coordination with the services affected.

VA Response: Yes. The SOW has been updated accordingly

VA Response: Available Electrical Information attached. Changes to the feed may be deemed necessary based on electrical requirements for replacement systems.

VA Response: The government will consider extending the PoP as a zero-cost time extension as needed due to lead times.

VA Response: Scheduling for test and balance will take place according to services’ needs.

Will the contractor simply be required to perform a preconstruction traverse at the main ducts and therefore only be required to meet the preconstruction values upon final test and balance?

-A yes response would indicate that the contractor would not inspect the downstream duct and areas served. This option ignores any potential shortcomings of the system and while it is the cheapest option, it presents the most risk to the VA.

VA Response: Contractor will be responsible for conducting a traverse at the main ducts as well as end of point use to determine if current system meets requirements or will need upgrades, and upgrade accordingly if needed.

Will the contractor be required to perform a preconstruction air flow at the mains and at all of grilles and hoods served, provide a single line as built of existing conditions, and then have our engineer verify code compliance for required ACH and pressure relationship.

-A yes response would indicate that the contractor would confirm all points on the system and determine if the existing system meets code compliance. Additionally, this option would provide an engineered solution to any shortcomings of the system. Any additional scope (if found) would need to be handled as a change order.

VA Response: Yes

VA Response: Unit information can be found in OR renovation package that was provided

VA Response: Additional information available provided, however site investigation will be required. The contractor will be responsible for field verification to obtain this information.

VA Response: Refer to OSHA safety guidelines.

VA Response: Unclear what units are being referred to. Exhaust fans will need to be replaced. Existing AHU will remain but be converted to fan wall and recommissioned. Humidifier shall be repaired or replaced as needed – an add alternate may be submitted for replacement.

VA Response: Work hours will be coordinated with affected services. This will include some off-hour work when shutdowns will be required.

VA Response: The facility uses Metasys for a BAS and controls equipment must be compatible.

VA Response: Additional exhaust fan and electrical information will be attached. No other documentation is available at this time.

Attachment 2 RFI Tracking Log