B09_A2_Answers_to_RFIs_0002.docx

George Washington Memorial Parkway (GWMP) The Robert E. Lee Memorial (ARHO) RFP 140P1326Q0033 Arlington House Bunker HVAC Amendment 0002 – RFIs and RFI Answers Issued:9/25/2026 All RFIs received following the instructions in the solicitation by the due date and time specified are in this document along with answers provided by the Government.

1. Refer to SOW 1.0; 1.21.0; 1.2; 1.2.1-1.2.7 – Overall Equipment Scope / Site Visit Clarification. During the site visit, the Contractor was shown multiple components throughout the HVAC system; however, the equipment discussed in the field did not fully align with the equipment and tasks identified in the PWS. Please identify the specific pieces of HVAC equipment and components that are to be repaired, replaced, tested, or commissioned under the base scope. If available, please provide a marked-up equipment schedule, drawings, photographs, or equipment list identifying each item. Please confirm that equipment not specifically identified by the Government is excluded from the base bid unless subsequently authorized by the Contracting Officer.

a. The complete system that all contractors looked at while doing site visit.

2. Refer to SOW 1.2.1; 1.2.2 – Pump VFD Replacements. Please confirm that Pumps 1 and 2, which currently appear to have existing HOA/motor control devices, are to have those existing controls removed and replaced with new VFDs. Please also identify the applicable pump motors and provide or confirm motor horsepower, voltage, FLA, and any required VFD control/interface requirements.

a. Replace any failed pumps and need vailed VFD.

3. Refer to SOW 1.2.2; 1.2.4 – Circulating Pump Replacement. The PWS references replacement of the circulating pump in the singular. Please identify the specific circulating pump to be replaced and confirm whether this is one of the Pumps 1 or 2 referenced above or a separate pump. Please provide available pump data including manufacturer/model, design flow, head, motor horsepower/voltage, and whether the existing base, piping connections, and electrical feed are intended to be reused.

a. All non-working circulating pumps replaced.

4. Refer to SOW 1.2.2; 1.2.2 Performance-Based Tasks – Chilled Water / Heating Water Piping and Valve Repairs. Please clarify the extent of chilled water and heating water piping and valve repairs required. The PWS specifically references chilled water piping, insulation, and valves; please confirm whether heating water piping/valves are also included. Please identify the specific piping, valves, insulation, locations, sizes, quantities, and anticipated repairs or replacements to be included in the base scope.

a. All damaged carbon steel piping within bunker is to be replaced.

5. Refer to SOW 1.2.3; 1.0.1(h)-(m) – Chiller Refrigerant Leak Testing and Repairs. Please identify the specific chiller/refrigeration circuit(s) requiring leak testing and provide any known leak history or previously identified leak locations. Because the source and extent of the leak are presently unknown, please confirm whether the base bid may include a defined block of labor for leak investigation/troubleshooting, with any required repair materials, replacement components, refrigerant, and additional labor handled as Additional Repair & Replacement (R&R) subject to Contracting Officer authorization. If not, please provide the pricing assumption the Government expects bidders to carry for unknown leak repairs.

a. Make a complete system leak test for the system within the bunker and outside of bunker throughout the complete system and make repairs as need.

6. Refer to SOW 1.0.1(e); 1.2.3 – Chiller Condenser Maintenance. Please confirm whether maintenance and/or cleaning of the chiller condenser section is required under this project. The condenser appears to have been out of operation for an extended period. If included, please identify the required cleaning/maintenance method, inspection requirements, and acceptance criteria.

a. No cleaning required on chiller.

7. Refer to SOW 1.2.5; 1.2.2 Mechanical Repairs – Water Treatment System Restoration - Scope. Please clarify the extent of work anticipated to restore the water treatment system. Please identify the specific equipment and components included, such as chemical feed pumps, tanks, filters/strainers, controllers, probes/sensors, piping, valves, controls, and chemicals. Please also confirm whether an initial chemical charge/treatment and any replacement consumables are to be included in the base bid.

a. Chemical water treatment system stays. GWMP will conduct water treatment testing.

8. Refer to SOW 1.2.7; 2.1 – Water Treatment System Restoration – Water Treatment Functionality Testing. Please clarify what is expected as part of water treatment functionality testing. Please identify the required water-quality parameters, sampling/testing procedures, chemical concentration targets, corrosion-control criteria, reporting requirements, and final acceptance criteria.

a. GWMP will conduct water treatment testing.

9. Refer to SOW 1.2.4; 1.2.7 – Airflow Validation. Please clarify the airflow validation requirements referenced in the commissioning scope. Please identify the equipment, air systems, outlets, or zones to be tested and whether the requirement is limited to verification of existing airflow or requires full testing, adjusting, and balancing (TAB) services, including system adjustments and a certified TAB report.

a. Yes, test air flow on complete system.

10. Refer to SOW 1.2.3 Controls Upgrades; 1.2.6 – Metasys Controls Update and Validation. Please provide the intended limits of the Metasys controls work, including the existing points list/sequence of operations if available. Please confirm whether NPS will provide access to the existing Metasys server/database and necessary credentials/licensing, and identify any required new points, graphics, alarms, trends, sensor replacements/calibration, or programming changes that must be included.

a. Updated version of Metasys software required and access will be provided.

11. Refer to SOW 1.2.4; 1.2.7; 1.2.9 – Third-Party Commissioning. Please confirm whether third-party independent commissioning is required. If so, please provide the required commissioning-agent qualifications, scope, functional performance tests, witnessing requirements, documentation, and responsibilities. If third-party commissioning is not required, please confirm that commissioning may be performed and documented by the Contractor and its qualified subcontractors.

a. No.

12. Refer to SOW 3.1; Applicable Contract Requirements – Project Superintendent / Site Supervisor. Please confirm whether a dedicated Project Superintendent or Site Supervisor is required in addition to the Contract Manager identified in the PWS. If required, please confirm whether this individual must be a direct W-2 employee of the prime contractor or whether a qualified subcontractor employee may serve in that capacity under the prime contractor's direction and authority. Please also confirm whether the Superintendent/Site Supervisor must be onsite whenever work is being performed.

a. Employee of Prime Contractor.

13. Refer to SOW 4.3; Applicable Safety Requirements – Site Safety and Health Officer (SSHO). Please confirm whether a designated SSHO is required for this project. If required, please identify the minimum training, experience, and certification requirements; whether the SSHO must be a direct W-2 employee of the prime contractor or may be a qualified subcontractor employee; and whether the SSHO must be onsite whenever work is performed.

a. No.

14. Refer to SOW 2.5; 2.5.1; 2.5.2 – Quality Control Manager (QCM). The PWS requires a Quality Control Plan and Quality Control Checklists. Please confirm whether a dedicated QCM is also required. If so, please identify the qualification requirements and confirm whether the QCM must be a direct W-2 employee of the prime contractor or may be a qualified subcontractor employee operating under the prime contractor's Quality Control Plan.

a. No.

15. Refer to SOW 2.5; 3.1; 4.3 – Combined Key Personnel Roles. Please confirm whether one qualified individual may serve concurrently as the Project Superintendent/Site Supervisor, SSHO, and QCM, or in any combination of those roles. If the roles must be separate, please identify which positions require separate personnel and which positions must remain onsite during performance.

a. Yes.

16. Refer to SOW 1.2.8; 2.1; 4.3; 6.5 – Refrigerant Recovery / Environmental Documentation. The PWS requires refrigerant reclamation/recovery and compliant disposal documentation. Please identify the specific closeout documentation required for refrigerant removed from the system, such as EPA Section 608 technician credentials, refrigerant recovery logs, quantity/type of refrigerant recovered, reclamation or disposal certificates/manifests, and final refrigerant charge records.

a. Yes, closeout documentation required for refrigerant removed from the system, such as EPA Section 608 technician credentials.

17. Refer to SOW 1.0 Description of Services; 1.2 Period of Performance – Project Completion Date / Period of Performance. The PWS states that all required services shall be completed no later than December 30, 2026, while a later section states that the period of performance will be 122 calendar days after award. Please confirm the controlling completion requirement bidders should use for scheduling and pricing.

a. The period of performance is 122 calendar days after award. Section 1.0 of the SOW shall be revised accordingly. If the award date changes, the period of performance shall be adjusted to ensure that the contractor receives the full 122 calendar days. Delivery and acceptance of a fully operational system are required no later than 122 calendar days after award.

18. Refer to SOW 6.1; 1.2.4 System Startup and Commissioning – Work Hours / Shutdown and Commissioning Activities. The PWS identifies regular work hours as Monday-Friday, 6:30 AM to 3:30 PM Eastern Time. Please confirm whether all shutdowns, startup, functional testing, controls work, and commissioning must occur within these hours or whether after-hours/weekend work may be required or permitted. Please identify any known operational restrictions or required outage windows.

a. Within the hours stated in PWS.

19. Refer to SOW 1.2.1 Preliminary Activities; 1.2.3 Controls Upgrades – Existing Drawings and System Documentation. The PWS requires the Contractor to review existing drawings, controls architecture, and equipment layouts. Please confirm whether current as-built mechanical drawings, equipment schedules, original equipment submittals, sequence-of-operations documents, and BAS/Metasys points lists will be provided to bidders or to the awardee. If available before bid, please provide them to support accurate scope and pricing.

a. No drawings available or equipment schedules.