007 - PPI Log.pdf

17 CES/CENM

JCGU 25-7002 Repair 250-Ton Air-Cooled Chiller, B3139 Goodfellow AFB, TX

PPI LOG 8/25/2025

Date PPI# Inquiry Engineer Response Date of Response

PPI-001

Where does the government want the new transfer switch located? The new transfer switch shall be located on the north wall of the enclosure north of the new chiller location. 8/19/2025

PPI-002

Where will the temporary chiller be placed? Need location to determine materials to supply temporary power.

The temporary chiller shall be placed on the southeast side of the mechanical pad in the grassy area. See attached image titled "PPI-002 Response." Please note that it will need to be out of the way to facilitate work and a crane to bring in new chiller.

8/19/2025

PPI-003

Is it the government’s intent to reuse existing underground conduits and if so, do they line up in the proper place for the new chiller?

If the Contractor's proposed chiller has an incoming power connection from underneath, then the existing stub-ups will suffice. If the proposed chiller has incoming power connection located on the side or elsewhere, the Contractor shall run an exterior flexible conduit from the stub-ups to the connection.

8/19/2025

PPI-004

Will the poles being used for the overhead net be removed at least on the north side to accommodate for new conduits to reach the chiller if underground conduits are abandoned in place?

The Contractor shall remove all poles and fixtures connecting the overhead net. Remaining protruding bolts shall be cut flush with the concrete. 8/19/2025

PPI-005 Please provide details and pictures of the indoor Chilled Water Pump(s). See attached images titled "PPI-005 and 006 Response". 8/14/2025

PPI-006 Are there isolation valves on the Supply and return chilled water piping at the indoor pumps before coming out to the chiller yard?

Yes, see attached image titled "PPI-005 and 006 Response". 8/14/2025

PPI-007

Is there a preferred Controls Vendor that is required to be used for the Controls Disconnect/Reconnect?

No. However, the Controls Vendor must be certified to perform work on the existing control system. 8/19/2025

PPI-008 Will the prime Contractor need to provide a full-time, on-site superintendent during all onsite work?

Yes, during any on-site work. See FAR 52.236-6. 8/19/2025

PPI-009

Will the Government provide a space for the Contractor to use as a temporary office, or will the Contractor be required to provide their own temporary office space?

No. Temporary office space is not required.

8/19/2025

PPI-010

Will the Government provide access to restroom facilities during the duration of work onsite, or is the Contractor required to provide their own temporary restrooms and handwash?

No, the Contractor shall provide all necessary portable toilet facilities. (SOW 1.6.6) 8/19/2025

PPI-011

If the Contractor is required to provide their own independent office space for duration of field work, will the Government provide access to temporary power and water?

The Contractor is not required to provide any temporary office space.

8/19/2025

PPI-012

Please verify the existing breaker serving the chiller is 600-A. Nameplate has been removed.

The 800A panel services 600A breaker to the chiller. See attachment titled "PPI-012 Response".

8/14/2025

PPI-013 Please verify there is no CHWP scope of work for this project. No, chilled water pump work is not within the scope of work. 8/19/2025

PPI-014

Please verify a temporary chiller is only needed while the old chiller is removed, pad extension poured & cured, & new chiller piped & started up.

Yes. The temporary chiller will only be required while the new work is performed and new chiller is installed. 8/19/2025

PPI-015 Please verify that the temporary taps will need to be relocated closer to where the CHW S/R stub up to account for the new chiller layout & pad.

The new pad and chiller layout does not require relocating the taps for a temporary chiller. 8/19/2025

PPI-016 Please verify that new heat trace will be needed for the new CHW S/R. Heat trace is not required for new S/R lines. See SOW Addendum 01. 8/19/2025

PPI-017 Is the DDC scope to just disconnect & reconnect? Please advise if any other controls scope is needed.

Yes, Contractor shall re-utilize existing controls. 8/19/2025

PPI-018

Will the Government extend the proposal due date to allow for at least 7 calendar days after Contractor’s receipt of Government responses to questions?

That decision is up to the Contracting Officer. The current due date was extended to 25 August 2025. 8/14/2025

PRE-PROPOSAL INQUIRIES (PPI)

Project # JCGU 25-7002, Repair 250-Ton Air-Cooled Chiller, B3139

Drew Dycus https://usaf.dps.mil/sites/goodfellowafb/17MSG/17CES/Share Storage new/CEN/CENMP/0_Active Projects/2025/25-7002 Repair 250-Ton Air-Cooled Chiller, B3139/03-Construction/01-Procurement/08- PPIs/JCGU 25-7002 PPI Log

Goodfellow AFB, TX

PPI LOG 8/25/2025

PPI-019

Clarify capacity, type, and acceptable method for temporary cooling to B3139 during chiller replacement.

Contractor shall provide air-cooled chiller with the same capacity as existing chiller 8/19/2025

PPI-020

Confirm process and approval authority for extended work hours/weekend or holiday work.

The Contractor shall request any irregular working hours through the Contracting Officer.

8/19/2025

PPI-021

Confirm procedures for scheduling shutdowns in occupied dorms, including minimum notice and mitigation steps.

The Contractor shall provide a 30-day advance notice for chiller outages to the greatest extent possible. 17 CES shall coordinate all outages with the Facility Mangers and Military Training Leaders.

8/19/2025

PPI-022 Provide sample forms/templates for DD Form 1354, AF IMT 3136, and Project Closeout Checklist.

These forms shall be available upon request, post-award. 8/14/2025

PPI-023

Confirm whether existing 277/480V, 600A breaker is adequate for the new chiller or if service upgrades are required.

The existing 600A breaker will is sufficent. Anticipate no service upgrades.

8/14/2025

PPI-024

Provide confirmed as-built utility drawings showing chilled water, electrical, and heat trace routing to avoid conflicts.

See attachments titled "PPI-024 Response." This attachment is shows a diagram of how the water lines and heat trace are connected. We do not have current as-builts of this area. The heat trace is connected outside of the scope of work and shall remain. See SOW Addendum 01.

8/19/2025

PPI-025

Clarify acceptable delivery vehicle weight/load restrictions and any scheduling restrictions beyond 'high pedestrian traffic' avoidance for troopwalk access.

The troopwalk is designed for emergency vehicle usage.

8/19/2025

PPI-026

Confirm if substitutions for refrigerant type (R-513A vs. R-134a) are acceptable due to availability.

Existing R-134a is to be recovered and disposed of by the Contractor.(SOW 3.3.1.b,c)

All new refrigerant shall be R-513A.(SOW 2.4.2.h.vii) 8/19/2025

PPI-027

Clarify EMCS interface protocol requirements for BACnet MS/TP and whether government-furnished programming will be provided.

The Contractor is responsible to disconnect and reconnect the existing EMCS Controls. The Government will ensure proper programming in the future. 8/19/2025

PPI-028

Confirm final kAIC rating and enclosure type for the 3-pole 460V transfer switch.

Confirm reinforcement dowel details, compressive strength testing requirements, and expansion joint placement for concrete pad per TE-1.

See attachment titled "PPI-028 Response" and reference Panel A for kAIC rating. Enclosure type for the transfer switch shall be a NEMA 3R enclosure or approved equal.

Contractor shall dowel 16" #3 rebar at an 8" depth into existing pad at 16" on center. See dimensions of new concrete in TE-1.

8/19/2025

PPI-029

Clarify acceptable manufacturers/models for elastomeric seismic isolators.

Confirm insulation thickness and material for valves and test ports, including removable insulation requirements.

The Contractor shall provide elastomeric seismic isolators per manufacturer's instruction.

The existing S/R piping is 6" diameter piping. At all test ports, the insulation and aluminum sheilding shall be removable, so that using these ports will not require destructive work.

8/19/2025

PPI-030

Verify existing heat trace circuit capacity for new piping and if additional breakers/wiring are required.

All existing heat trace shall remain. New S/R piping does not include heat trace. New wiring is not required. 8/19/2025

PPI-031

Provide sample commissioning forms/checklists acceptable to the Contracting Officer for Trane factory startup.

The Contractor shall utilize Trane equipment startup services and associated checklist for starting up their chillers. 8/19/2025

PPI-032

Clarify required test pressures, duration, and media for chilled water piping prior to insulation.

The Contractor shall leak test with air or water for one hour at 100 psi.

8/19/2025

PPI-033

Confirm whether the 14-day AF Form 103 Work Clearance Request processing can run concurrently with mobilization activities.

Yes. The Contractor may mobilize during the AF 103 processing, given NTP has been issued there is no digging during this mobilization period. 8/19/2025

PPI-034

Clarify fire watch requirements and approval process for AF Form 592 welding/brazing permit.

Obtaining the burn permit is the responsibility of the Contractor if there is any anticipated welding/cutting/brazing. The Contractor shall call the number as described in SOW 4.5.1. A Goodfellow Fire Department representative will schedule a meeting with the site superintendent to provide a briefing on the burn requirements, and will provide the permit.

8/19/2025

Drew Dycus https://usaf.dps.mil/sites/goodfellowafb/17MSG/17CES/Share Storage new/CEN/CENMP/0_Active Projects/2025/25-7002 Repair 250-Ton Air-Cooled Chiller, B3139/03-Construction/01-Procurement/08-

Goodfellow AFB, TX

PPI LOG 8/25/2025

PPI-035

Can the period of performance be extended after the award once the material / equipment lead times are confirmed due to current market conditions for the equipment for this project?

Yes. The Contractor shall inform the Contracting Officer of any time constraints due to lead times and may request an extension. 8/11/2025

PPI-036 Please provide the site visit attendee sign in sheet. The Contracting Officer will attach the attendee sign-in sheet to the solicitation. 8/11/2025

PPI-037

Please confirm that no hazmat is required to be abated by the General Contractor

There is no hazmat abatement required in this scope of work. However, R-134a is a hazardous material and shall be disposed per the requirements listed in Attachment 04 in the original solicitation. (Env Requirements section 6)

8/19/2025

PPI-038

Please confirm that existing concrete housekeeping pads are adequate for the new equipment.

The concrete pad shall be extended to meet the new chiller clear space requirements. See Drawing #3 in TE-1 for details. 8/19/2025

PPI-039

Does this project require a third-party commissioning agent procured by the General Contractor?

Yes.

8/19/2025

PPI-040

Do the Superintendent, SSHO and QC Manager need to be 3 separate individuals?

No, there shall be one superintendent on site serving the roles of SSHO and QC Manager.

8/19/2025

Drew Dycus https://usaf.dps.mil/sites/goodfellowafb/17MSG/17CES/Share Storage new/CEN/CENMP/0_Active Projects/2025/25-7002 Repair 250-Ton Air-Cooled Chiller, B3139/03-Construction/01-Procurement/08-

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