PERFORMANCE WORK STATEMENT (PWS)

Arlington House Bunker – HVAC System Repairs and Upgrades Location: Arlington House / The Robert E. Lee Memorial 321 Sherman Drive Fort Myer VA 22211 8/24/2026 Arlington House, The Robert E. Lee Memorial, sits at the heart of Arlington National Cemetery and is managed by the National Park Service (NPS). Constructed between 1802 and 1818 as the home of George Washington Parke Custis and later associated with Robert E. Lee, the estate embodies complex layers of American history, from the early republic and plantation life to Civil War conflict and contemporary preservation efforts.

Prepared by: Daryl Leftwood National Park Services (NPS)

1.0 DESCRIPTION OF SERVICES

The National Park Service requires the repair, upgrade, and commissioning of the HVAC systems serving the Arlington House Bunker at Arlington National Cemetery. These services include replacement of variable frequency drives (VFDs), chilled water piping and valve repairs, refrigerant leak testing and repairs, circulating pump replacement, restoration of the water treatment system, and upgrades to the Metasys controls platform. The work also requires full system commissioning and the delivery of all associated documentation.

The Contractor shall provide all management, labor, materials, supervision, tools, equipment, testing, controls programming, commissioning, and disposal services necessary to restore the HVAC system to full operational readiness. All required services shall be completed no later than December 30, 2026.

Required tasks include:

· Replacement of failed VFDs

· Chilled water piping and valve repairs

· R‑410A refrigerant leak testing and repair

· Circulating pump replacement

· Water treatment system restoration

· Metasys controls update and validation

· System startup and commissioning, including airflow validation, safety controls testing, and water treatment functionality checks

· Environmentally compliant disposal of all removed materials

· Delivery of an assessment report, commissioning report, controls documentation, and as‑built drawings

1.0.1. DEFINITIONS

a. Contracting Officer (CO): The Contracting Officer is the Government official with the legal authority to enter into, administer, or terminate contracts and to make related determinations on behalf of the Government. Only the CO may bind the Government contractually, including authorizing repairs and replacements (R&R), issuing contract modifications, and negotiating contract terms

b. Contracting Officer’s Representative (COR): The COR is a Government employee designated in writing by the CO to perform specific technical and administrative functions under the contract. The COR’s authority is defined in the CO’s appointment letter. The COR monitors contractor performance and provides technical direction within the scope of the contract but may not change contract terms, conditions, price, schedule, or authorize repairs or replacements outside the scope of the contract.

c. Defect: A condition, flaw, or inadequacy in the contractor’s performance that fails to meet contractual standards, specifications, or quality requirements, including work that is incomplete, incorrect, or inconsistent with functional or appearance criteria.

d. Deficiency: A condition in a unit, system, or component that does not meet required operational, functional, or performance standards. A deficiency indicates improper operation, damage, or noncompliance with contract requirements.

e. Maintenance: Routine servicing and upkeep of systems, equipment, or components to ensure proper function and compliance with applicable standards. Maintenance includes cleaning, lubricating, calibrating, adjusting, and replacing nominal‑value items (e.g., screws, nuts, bolts). Maintenance prevents failures and extends service life but does not include major repairs or component replacements.

f. Repair: Work performed to restore an item, system, or component to original or functional condition after damage, wear, or failure. Repair activities may include fixing, adjusting, patching, or refurbishing parts without replacing the entire item.

g. Replacement: The removal of an existing item, system, or component and installation of a new, identical, or equivalent item when repair is not feasible, cost‑effective, or practical.

h. Additional Repair: A repair with an estimated total cost that exceeds $2,500.

i. Minor Repair: A repair with an estimated total cost that does not exceed $2,500 or is highly unlikely to exceed that threshold. If it is reasonably likely the cost may exceed $2,500, the work shall be treated as an Additional Repair.

j. Additional Replacement: A replacement with an estimated total cost that exceeds $2,500.

k. Minor Replacement: A replacement with an estimated total cost that does not exceed $2,500 or is highly unlikely to exceed that threshold. If a reasonable likelihood exists that the cost may exceed $2,500, the work shall be treated as an Additional Replacement.

l. Additional Repair & Replacement (R&R) (“Additional R&R”): Repair and/or replacement work with an estimated total cost exceeding $2,500.

m. Minor Repair & Replacement (R&R) (“Minor R&R): Repair and/or replacement work with an estimated total cost that does not exceed $2,500 or is highly unlikely to exceed it. If the total cost may reasonably exceed $2,500, the work shall be treated as Additional R&R.

1.0.2 ABBREVIATIONS

a. CO: Contracting Officer

b. COR: Contracting Officer’s Representative

c. NPS: National Park Service

1.1 BACKGROUND

Arlington House, The Robert E. Lee Memorial, is a nationally significant historic site managed by the National Park Service (NPS). The mansion and surrounding facilities underwent a major multi‑year rehabilitation beginning in 2018, including structural stabilization, restoration of historic finishes, installation of modern mechanical systems, and improvements to visitor accessibility. As part of this broader effort, the NPS constructed a dedicated mechanical bunker to support upgraded fire suppression and climate management systems essential for protecting historic structures, museum collections, and interpretive spaces.

The HVAC systems within the Arlington House Bunker play a critical role in maintaining stable temperature, humidity, and ventilation conditions needed to preserve the site’s artifacts and ensure reliable operation of recently modernized building systems. Maintaining these systems is also necessary to support ongoing NPS initiatives aimed at improving environmental control, energy efficiency, and long‑term preservation of cultural resources across Arlington House. The required HVAC repairs, upgrades, and commissioning activities directly support these mission‑driven objectives and ensure the mechanical infrastructure continues to function effectively as part of the larger rehabilitation program.

1.2 SCOPE

The Contractor shall furnish all labor, materials, supervision, tools, equipment, testing services, controls programming, commissioning, and compliant disposal necessary to restore the Arlington House Bunker HVAC system to full operational readiness. Work shall be completed in a logical, sequential order to ensure safe and efficient system restoration. The scope of services includes:

1.2.1 Preliminary Activities

· Review existing system conditions, drawings, controls architecture, and equipment layouts.

· Coordinate site access, safety protocols, and shutdown procedures with NPS representatives.

· Verify equipment compatibility, staging requirements, and planned sequencing to minimize system downtime.

1.2.2 Mechanical and Electrical Repairs

· Replace failed variable frequency drives (VFDs) and verify proper motor integration.

· Repair or replace chilled water piping, insulation, and valves as needed to restore leak‑free operation.

· Perform R‑410A refrigerant leak testing, repair identified leaks, and recharge the system in accordance with EPA requirements.

· Remove and replace the circulating pump, including alignment, electrical reconnection, and performance testing.

· Restore the water treatment system, including chemical balance, filtration components, and verification of corrosion‑control functionality.

1.2.3 Controls Upgrades

· Update and validate the Metasys building automation system, including sensor calibration, sequence‑of‑operations verification, and programming of any new components.

· Confirm integration of all HVAC equipment into the control platform and ensure proper alarm, trend, and reporting functionality.

1.2.4 System Startup and Commissioning

· Conduct full system startup including airflow verification, valve operation checks, and safety control validation.

· Test chilled water flow, refrigerant performance, pump operation, and water treatment functionality.

· Document commissioning procedures, results, and corrective actions.

1.2.5 Disposal and Site Restoration

· Remove all replaced materials, debris, refrigerants, chemicals, and waste in accordance with environmental and regulatory requirements.

· Restore all work areas to clean, safe, and serviceable condition.

1.2.6 Documentation Deliverables

· Provide a complete assessment report outlining existing conditions and corrective actions.

· Submit commissioning report detailing all testing results and verifications.

· Deliver updated controls documentation reflecting programming changes.

· Provide accurate as‑built drawings for all HVAC system modifications.

1.2 Performance‑Based Tasks

1.2.1 Variable Frequency Drive (VFD) Replacement

The Contractor shall remove failed VFDs, install new units, verify proper motor operation, and ensure stable performance under all load conditions.

1.2.2 Chilled Water Piping and Valve Repairs

The Contractor shall repair or replace chilled water piping, insulation, and valves to restore leak‑free and structurally sound flow through the system.

1.2.3 Refrigerant Leak Testing and Repair (R‑410A)

The Contractor shall conduct refrigerant leak testing, repair identified leaks, and recharge the system in compliance with all environmental and regulatory standards.

1.2.4 Circulating Pump Replacement

The Contractor shall remove the existing circulating pump, install a new unit, align and reconnect all mechanical/electrical components, and validate flow performance.

1.2.5 Water Treatment System Restoration

The Contractor shall restore full water treatment functionality, including chemical balancing, filtration, corrosion control, and verification of system stability.

1.2.6 Metasys Controls Update and Validation

The Contractor shall update Metasys controls programming, calibrate sensors, validate sequences of operation, and confirm full integration of HVAC equipment into the control platform.

1.2.7 System Startup and Commissioning

The Contractor shall perform commissioning including airflow verification, safety control testing, chilled water performance checks, and water treatment functionality testing.

1.2.8 Environmental‑Compliant Disposal

The Contractor shall dispose of all replaced materials, refrigerants, chemicals, and waste in accordance with federal, state, and local environmental requirements.

1.2.9 Documentation Deliverables

The Contractor shall provide all required documentation, including an assessment report, commissioning report, updated controls documentation, and accurate as‑built drawings.

Period of Performance:

The period of performance will be 122-calendar days after Award.

1.3 PERMITS, LICENSE & INSURANCE

The Contractor shall be responsible for obtaining and holding all necessary permits, licenses and insurance required to accomplish these services, including final disposition. The contractor shall be responsible for complying with all Federal, State and Local requirements for waste disposal and any other service activities made under this effort. The contractor shall be responsible to ensure sub-contractors possess the appropriate licensing for the sub-contracted service activities provided.

1.4 GOVERNMENT FURNISHED PROPERTY AND SERVICES

No government furnished property or services provided.

1.5 CONTRACTOR PROVIDED EQUIPMENT AND SUPPLIES

The Contractor shall provide and maintain all equipment and vehicles required to perform the work under this contract. Cleaning, minor repairs, and routine equipment maintenance may be performed on site; however, major maintenance or repairs of Contractor containers, vehicles, or privately owned vehicles shall not be conducted on site.

Contractor equipment and vehicles shall be maintained in a neat, professional condition and used solely for performing services described in this Performance Work Statement during normal hours of operation.

All equipment used under this contract shall be in good, operable condition. Equipment that is unsafe or unable to function as designed shall not be used. The Contracting Officer (CO) or Contracting Officer’s Representative (COR) may inspect Contractor equipment at any time while on Government property or at the YB Piers 39‑40 and may direct removal of unsafe or unusable equipment.

The Contractor shall provide a sufficient number of equipment items and vehicles to fully meet contract requirements. The Contractor shall also maintain backup capability to ensure continuous service if primary equipment becomes unavailable due to extended maintenance or repair. Equipment failure does not relieve the Contractor of responsibility to meet any contract requirement

2.0 CONTRACT PERFORMANCE

All work will be evaluated against the Performance Objectives and Performance Thresholds in the Service Summary. The Government will validate and confirm services using the methods identified in the Service Summary.

2.1 SERVICE SUMMARY (SS)

The contract service requirements are summarized in the performance objectives contained in the Service Summary. Each objective includes a performance threshold that defines the minimum acceptable level of service. The Service Summary outlines the required services, the expected level of Contractor performance, and the Government’s method for validating and confirming performance.

QASP Service Summary Table

2.2 PRE-PERFORMANCE MEETING

The Contractor shall participate in a mandatory pre‑performance meeting with the Government. This meeting will address pre‑performance coordination, performance expectations, communication protocols, and operational requirements necessary for effective contract execution. The Contractor’s attendance is required to ensure a shared understanding of roles and responsibilities before performance begins. The meeting typically occurs prior to the start of performance; however, the Contracting Officer (CO) may authorize performance to commence before the meeting is held

The Contractor shall submit a schedule for all services described in this PWS and Appendices to the COR for approval 5 calendar days prior to the scheduled performance start date. The Contractor shall not deviate from the approved schedule without prior approval from the CO. Permanent changes to the schedule shall be submitted 5 days before implementation and must receive CO approval before the Government will allow the proposed changes. The schedule must be submitted electronically using a file format compatible with Government software.

2.4 PROGRESS MEETINGS

The CO, COR, other government personnel, as appropriate, and the Contractor shall periodically meet to discuss the Contractor’s performance. The following issues shall be discussed: opportunities to improve the contract, required contract modification(s), unsatisfactory inspections and trends against each performance objective observed, positive performance and steps taken by the contractor to prevent unsatisfactory occurrences in the future. The Contractor shall provide a summary of unsatisfactory inspections and customer complaints and shall provide insight into any identified trends, root cause analysis, and performance improvement plan.

2.4.1 Progress Meeting Minutes

The CO will develop meeting minutes and distribute those minutes to the Government team and the Contractor. Should the Contractor not concur with the minutes, the Contractor shall provide a written notification to the CO identifying areas of non-concurrence for resolution.

2.5 CONTRACTOR’S QUALITY CONTROL

The Contractor shall develop and maintain a quality program to ensure the services described by this PWS are performed in accordance with commonly accepted commercial practices. The Contractor shall develop and implement procedures to identify, prevent, and ensure non-recurrence of defective services. At a minimum the contractor shall develop quality control procedures addressing the areas identified in paragraph 2.0, Service Summary.

2.5.1 Contractor’s Quality Control Plan (QCP)

The Contractor shall develop and maintain a Quality Control Plan that, at a minimum, communicates: (1) What will be monitored; (2) How monitoring will take place; (3) When monitoring will take place; (4) Who will conduct monitoring; and, (5) How monitoring efforts and results will be documented.

2.5.2 Contractor’s Quality Control Checklist(s)

The Contractor shall develop and maintain one or more Quality Control Checklists that align with the Contractor’s QCP and capture, at a minimum, the following: (1) Tasks; (2) Validation of acceptability of tasks; (3) Inspector name; (4) Inspection method; (5) Inspection date; and, (6) Inspection time.

2.6 QUALITY ASSURANCE

The Government shall inspect and evaluate the Contractor’s performance to ensure services are received in accordance with requirements set forth in this PWS. The CO will appoint a primary and alternate representative for management of the day-to-day activities of the contract. The identity, title, and authority of this representative will be provided in writing to the Contractor after contact award. The contractor shall provide work schedules to the Contracting Officer’s Representative (COR). The COR may inspect by validating actual work performance, physically checking an attribute of the completed task, checking a management information report, investigating customer complaints, conferring with facility managers or otherwise inspecting the task or its results to determine whether or not performance meets the standards contained in this PWS.

2.7 GOVERNMENT REMEDIES

The Contracting Officer (CO) will follow FAR 52.212-4 Contract Terms and Conditions-Commercial Items, for the contractor’s failure to perform satisfactory services or failure to correct non-conforming services.

2.8 COMMERCIAL WARRANTY

The Government shall receive the same warranty service as the Contractor’s most favored customers. If the services fail to be performed or otherwise fail due to workmanship or materials, the Contractor shall correct the defects, deficiencies, and/or affected area(s) at no additional cost to the Government. The Government reserves the right to reject any unserviceable or substandard item and to require replacement with a serviceable like item or acceptable quality item or to require full credit for the item.

The contractor shall establish a contract manager or alternate(s) that can be contacted during work hours. The contract manager or alternate shall be available during normal duty hours to discuss contract related matters. The contractor shall provide the CO the telephone number(s) where performance validation results and complaints can be reported. This information will be kept updated by the contractor whenever personnel changes occur. The contract manager or alternate shall have full authority to act for the contractor on all contract matters relating to the daily operation of this contract.

3.2 CONTRACTOR PERSONNEL APPEARANCE

Contractor personnel shall present a neat appearance. contractor personnel shall be easily recognizable while on the installation in conjunction with this contract. This shall be accomplished through the wear of distinctive clothing, overcoats, or hats, bearing the company name or logo. The coloring or design of the items selected should be such that identifies personnel easily and quickly for reasons of safety and personal protection. All contractor personnel shall always be fully clothed while performing the services of this contract. "Fully Clothed" is deemed to mean that a shirt (or T-shirt), trousers, closed-toe shoes and personal protective equipment, if required, shall always be worn. Tact, diplomacy, and courtesy shall always be used during contact with the community.

3.3 REMOVAL OF CONTRACTOR EMPLOYEES

The contractor shall utilize only experienced, responsible and capable employees in the performance of this contract. The KO may require that the contractor remove any of his/her employees who endanger persons or property, or whose continued employment under this contract is inconsistent with the interests of the U.S. Government.

3.4 EMPLOYEE RESTRICTIONS

The Contracting Officer is authorized to restrict employment under the contract of any contractor employee or prospective contractor employee who is identified as a potential threat to the health, safety, security, general well-being, or operational mission of the installation and its population.

3.5 EMPLOYEE ROSTER

The Contractor shall provide a complete roster of all personnel (including the Contract Manager) to the COR prior to start of performance. The roster must include all employee names and telephone numbers. The Contractor shall maintain a current listing of employees, providing updates as changes occur.

4.0 PARK GROUNDS REQUIREMENTS

4.1 WORK RESTRICTIONS & RESOURCE PROTECTION

The NPS is the steward of unique resources found within the national parks. The NPS is committed to protecting natural, cultural, historical, archaeological, and other resources found within the parks and the adjacent lands.

4.2 INSTALLATION SECURITY AND ACCESS REQUIREMENTS

Contractor will need to acquire a entrance pass from ANC. GWMP will need vehicle/staffing information to help facilitate this pass. The pass will be provided at no cost to the contractor.

4.3 SAFETY REQUIREMENTS AND REPORTING

The Contractor shall perform work in a safe manner as required by the Occupational Safety and Health Administration’s (OSHA) requirements. The Contractor shall immediately provide a verbal report to the CO and COR for each occurrence of damage to Government property or an accident resulting in death, injury, occupational disease, or adverse environmental impact.

Reclaim any refrigerant when required.

ACCIDENT REPORTING: The contractor shall report emergency situations, such as accidents involving property and/or personal injury or other unforeseen circumstances and shall follow required emergency reporting procedures according to the CO/COR approved Safety Plan. In the event of an emergency the contractor shall dial 911.

A. Accident Reporting: Reportable Accidents: A reportable accident is defined as death, occupational disease, traumatic injury to employees or the public, property damage by accident in excess of $100, and fires.

a. Notify COR/POC and CO immediately in the event of a reportable accident.

b. Fill out and forward an Accident/Property Damage report Form (CM-22) to COR/POC and CO within 7 days of a reportable accident. Obtain form from COR/POC or CO.

B. All Other Accidents: The Contractor shall report all other accidents to the CO as soon as possible and assist the Contracting Officer and other officials as required in the investigation of the accident.

FIRE PREVENTION, PROTECTION AND REPORTING: Any fires shall be reported immediately to COR. Should the fire exceed the size of a campfire and threaten workers safety, the contractor should depart the area and call 911 immediately.

· Hazard Control: Take all necessary precautions to prevent fire during construction. Keep flammable substances or materials at a safe distance from use of volatile or noxious substances.

· Smoking is prohibited in the work areas in sites designated for the contractor’s use. Designate a space away from the work area be used for smoking. Cigarette butts must be disposed of properly.

· Protection Equipment Required: Furnish a minimum of one extinguisher for each 1,500 square feet of area or major fraction thereof and a sufficient number to meet the requirement that a travel distance from any workstation to the nearest extinguisher shall not exceed 75 feet. Fire extinguisher shall be of type and size appropriate for the work but no less than 10lb.

4.4 DAMAGES TO GOVERNMENT BUILDINGS, EQUIPMENT OR VEGETATION

Damages to government buildings, equipment, or vegetation are addressed in FAR 52.237-2, Protection of Government Buildings, Equipment and Vegetation. The Contractor shall use reasonable care to avoid damaging existing buildings, equipment, and vegetation on the Government installation. If the Contractor’s failure to use reasonable care causes damage to any of this property, the Contractor shall replace or repair the damage at no expense to the Government as the Contracting Officer directs. If the Contractor fails or refuses to make such repair or replacement, the Contractor shall be liable for the cost, which may be deducted from the contract price.

4.5 OFF LIMIT SIGNS

Contractor employees shall adhere to any warning and/or “OFF LIMITS” signs posted at the park. As required by federal, state, or local law and/or DOI or NPS policy, the Contractor shall post warnings and/or “OFF LIMITS” signs at the entrances of jobsite, and barricades around the jobsite while the equipment and/or systems are being serviced. The Contractor shall control all personnel desiring access into jobsite areas when work is in progress.

4.6 CONSERVATION OF UTILITIES

The contractor shall instruct employees in utility conservation practices. The contractor shall be responsible for operating under conditions, which preclude the waste of utilities. The contractor shall comply with additional energy policies upon notification by the CO.

4.7 CLEANLINESS

The Contractor is responsible for cleanliness of the service areas. This includes, but is not limited to, washing, sweeping, dusting and other janitorial services necessary to maintain the area in a clean and sanitary condition. The contractor shall furnish such supplies as required.

As a general policy, the National Park Service makes payments after work is complete for one time service and supply contracts. Recurring service contracts are paid at varying frequencies based the terms and conditions within the contract. The CO may establish a payment schedule, but payments will only be made after the Government has received a distinguishable benefit. Regardless of payment frequency, the process for payment is the same.

The contractor shall submit their request for payment via IPP. The request for payment must be based on work completed.

The Contractor shall:

(a) Submit to the COR and CO all invoices for review and approval.

(b) Ensure invoices are associated with the correct contract prior to submission.

(c) Ensure invoices identify the Contract Line Item Number (CLIN) under which the invoiced performance tasks and/or items are associated.

(d) Ensure billing aligns with any established CO-approved payment schedule.

(e) Ensure final invoice results in $0 balance prior to submission.

After submission to IPP, the RO will receive a payment request through FBMS and coordinate approval/rejection with the COR (courtesy copy the CO and CS). If the invoice is approved by the COR, the RO will process for payment.

5.2 DEPOSIT PAYMENTS

The Government shall not make payments for equipment, items, and/or other materials until a benefit is conferred. Payments shall not be made to reimburse the Contractor for deposits required for these items.

5.3 CONTRACT FINANCING

The requirements of FAR Part 32.003 apply and the Government will not provide contract financing.

The Contractor shall perform the required services during regular park business hours, Monday-Friday, from 6:30 to 3:30 pm Eastern Time.

6.2 HOLIDAYS & CLOSURES

No work shall be performed on Holidays. Contractor shall make every effort to schedule work on days other than those noted below.

Independence Day

Note - if any of the holidays stated above fall on a Saturday, the Friday before the actual day is the official day the Government takes for the holiday. If the holiday falls on a Sunday, the Monday after the actual day is the official day the Government takes for the holiday. These dates do not account for any other days or shorten days that may be added prior to any of the holidays mentioned above that may be added at the discretion of any Presidential Administration and implemented by the DOI.

6.3 DELIVERY AND STORAGE OF MATERIALS

All materials delivered and placed in storage shall be protected from the weather, humidity and temperature variations, dirt and dust, or other contaminants by the contractor.

6.4 DISPOSAL OF MATERIALS

All debris and unserviceable materials generated under this contract such as industrial waste, non-recyclable materials and equipment/material not listed on hand-receipts shall be disposed of off-base by the contractor in accordance with the prevailing and applicable laws. Hand receipt items require turn-in action by the contractor when the listed items have to be replaced.

6.5 HAZARDOUS MATERIALS

All hazardous materials must be contained and stored in the appropriate storage containers and/or cabinets. The contractor shall immediately report spills or release of hazardous materials to the CO and COR. The contractor shall be liable for containment and environmental clean-up of spill or release of such substance. The contractor shall comply with municipal environmental laws to protect the health and safety of employees/residents and minimize or eliminate environmental pollution. The contractor shall follow manufacturer’s guidelines and professional recommendations for control of humidity, temperature, cleanliness, and materials handling. Reclaim refrigerant.

The contractor shall comply with environmental and hazardous materials storage and handling requirements and maintain current Material Safety Data Sheets (MSDS).

6.7 PROHIBITIONS

DRONES/UNMANNED AERIAL VEHICLE (UAV) USAGE: The use of drones and/or UAVs are not authorized at INDE during performance of this contract.

PROHIBITION OF WEAPONS/FIREARMS: 18 USC 930 is Federal law that supersedes Section 512 of Public Law 111-24 and prohibits the possession of a firearm or other dangerous weapon in a Federal facility. Federal facilities are buildings or parts thereof owned or leased by the Federal Government, where Federal employees are regularly present for the purpose of performing official duties. No weapon or firearms are authorized within INDE at any time.

7.0 APPENDICES

The Government will make all of the below listed documents, forms, references and report formats directly addressed within this Performance-Based Work Statement available. Supplements or amendments to the below listed materials from any organizational level may be issued during the life of the contract. When notified by the CO, the Contractor shall immediately implement those changes in publications, which result in a decrease, or no change in the contract price. Prior to implementing any such revision, supplement, or amendment that will result in an increase in contract price, the Contractor shall submit to the CO a price proposal and obtain prior approval. Price proposals shall be submitted within 15 calendar days from the date the Contractor receives notice of the revision, supplement, or amendment giving rise to the increase in cost of performance. Changes in the contract price due to supplements and amendments shall be considered under the FAR 52.212-4, Contract Terms and Conditions – Commercial Items clause. Failure of the Contractor to submit a price proposal within 15 calendar days from the date of receipt of any change, shall entitle the Government to performance in accordance with such change, at no increase in contract price.