Questions and Answer 20APR2021.pdf

LARC HVACR Support Contract

W91ZLK-21-R-0016

Q&A 20 April 2021

• Does this contract account for PM?

o Yes. The COR will delegate PMCS IAW tasks outlined in the SOW. Time to complete these tasks will be billed against the CLIN 0001 hour total.

• What is the required response time for unscheduled service?

o Two hours to be on-site, as required by the SOW

• What specialty and/or non-OEM equipment is currently in service at each site?

o Included in PWS Appendix

• Is there a list of models and serial numbers?

o Included in PWS Appendix

• Is all equipment to be maintained stationed at a single location?

o No. Thirteen firing ranges at one central location. Portable environmental chambers throughout Aberdeen and Edgewood areas of APG.

• What hazards are present at the various job sites?

o Other than the standard industrial/electrical and HVAC-related hazards, lead exposure and slip, trip, and fall hazards are commonly encountered.

• Will vendor personnel need to be escorted full-time each time they come onsite?

o Primary POCs will have non-escort access to restricted areas, and have permission to escort additional support personnel as needed.

• What type of engineer is required for CLIN 0002?

o At least two Professional Engineers with at least five years of HVACR, automation, controls, and design experience each

• Does CLIN 0003 account for inflation and part price increases?

o Fair market pricing determined as of March 2021. All vendors should bid based on active market prices to ensure fair and consistent bidding.

• How often is servicing of the LARC ranges required?

o Bi-annual seasonal changeovers is generally two to three weekends each in April and September. Routine servicing throughout the year varies depending on test schedules.

• When was LARC last overhauled?

o Late 2000s

• Are there only 4 makeup air units in B690?

o Included in PWS Appendix

• Do the air handlers contain desiccant wheels?

o No. None of the LARC air systems contain desiccant wheels.

• What make and model are the lead-catching filters?

o All filters are made by Air Handler. Model numbers used include 2GHR3, 11Z806, 6B924, 6B930, 6B937, 6B950, 6B956, and 6B657. Filter dimensions and approximate annual quantities used are listed below:

Filter Size QTY. Used Per Year 24 x 24 x 2 560

24 x 24 x 12 380 24 x 24 x 11.5 50

22.5 x 22.5 x 2 10

20 x 25 x 2 240 20 x 22 x 1 10 20 x 20 x 2 360 16 x 25 x 2 500 16 x 25 x 1 10 16 x 20 x 2 80 16 x 20 x 1 20

8.75 x 42.125 x 1 25

8.875 x 61.125 x 1 10

21-5/8 x 43-7/8 x 2-7/8 3

• Where are the LARC lead catcher filters located?

o Lead-catching filters are installed in the exhaust plenums of each range.

• How often are the LARC air filters changed?

o The schedule is dependent on the specific range and usage; replacement intervals can vary from twice daily to every 60 days depending on load experienced.

• Are air filters procured through the government, or is the vendor responsible for procurement?

o Government generally procures via GPCC, but may procure via CLIN 0003 depending on urgency

• Are air filters recycled onsite?

o Contractor will support physical removal of filters; Government will handle recycling of filters.

• Does the government typically obtain advance knowledge of when heavy testing (lead output) will occur?

o Schedule is generally generated on a weekly basis due to evolving needs of customers

• Is automation for the LARC ranges web- or computer-based?

o Web based

• What software is used to control the LARC air handlers?

o Honeywell Niagara N4 is the primary central control software used, except one building that uses Niagara AX.

• Is there an existing service contract with Honeywell?

o The vendor for this contract is responsible for providing Honeywell support. A separate contract with Honeywell does NOT exist directly with the Government.

• Do mobile temperature boxes use standard refrigeration, cascade, CO2?

o Mechanical (single stage and cascade) and CO2 for rapid and supplemental cooling

• How is centralized control of the chambers set up for LARC and the mobile chambers?

o LARC system operates via Honeywell Niagara as stated above. MEU has centralized control of its chambers via SuperView software, which interfaces with chamber process controllers (i.e. Micristar).