J.1 SOB Conservation Maintenance IDIQ SOW.pdf

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Senate Office Buildings - Painted Metal Sculpture &

Architectural Elements Conservation and Maintenance Program

Indefinite Delivery Indefinite Quantity

(IDIQ)

Architect of the Capitol (AOC)

Senate Office Buildings

March 2024 i

CONTENTS

1.0 PROJECT TITLE

2.0 BACKGROUND

3.0 SCOPE OF WORK

4.0 REQUIRED SERVICES

5.0 REQUIREMENTS FOR MAINTENANCE

6.0 REQUIREMENTS FOR CONSERVATION AS NEEDED

7.0 REQUIREMENTS FOR EMERGENCY SERVICES

8.0 APPLICABLE POLICIES AND STANDARDS

9.0 TASKS

10.0 DELIVERABLES AND DELIVERY SCHEDULE

11.0 QUALITY ASSURANCE SURVEILLANCE PLAN (QASP) / QUALITY

CONTROL PLAN (QCP)

12.0 GOVERNMENT FURNISHED EQUIPMENT / PROPERTY (GFE/GFP)

13.0 CONTRACT TYPE

14.0 PERIOD OF PERFORMANCE

15.0 PLACE OF PERFORMANCE/HOURS OF OPERATION

16.0 TELEWORK

17.0 OTHER DIRECT COSTS (ODC)

18.0 TRAVEL

19.0 KEY PERSONNEL

19.1 Senior Conservator

19.2 Conservation Technician

20.0 SUBSTITUTION OF PERSONNEL

21.0 PERSONAL SERVICES

22.0 INVOICING

23.0 SECURITY

24.0 SAFETY

25.0 ENERGY EFFICIENCY / COMPLIANCE

26.0 SUSTAINABILITY

27.0 POINTS OF CONTACT

28.0 ACRONYMS

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29.0 SPECIFIC REQUIREMENTS

29.1 PROPOSAL SUBMISSION

29.2 TRAVEL COSTS

30.0 DELIVERABLES AND REPORTS

30.2 FINAL CONSERVATION REPORTS

30.3 MAINTENANCE REPORT

30.4 DELIVERY INSTRUCTIONS

30.5 INSPECTION AND ACCEPTANCE

1.0 PROJECT TITLE

Senate Office Building Painted Metal Sculpture and Architectural Elements Conservation and Maintenance Program

2.0 BACKGROUND

The Senate Office Buildings has on display numerous reliefs, historic mirrors, historic chandeliers and sconces, painted metal sculpture, ornamentations, and other architectural elements in various mediums, primarily plaster, steel, silver, bronze, and brass. Maintenance, including dusting, vacuuming, re-plating and waxing of selected elements, has been, on average, performed annually, while conservation is performed as needed. Conservation and maintenance of architectural fine art such as brass doors and railings, historic mirrors, lighting fixtures, leaded glass panels, bronze gates and panels, plaster models, and painted metal sculptures are also performed as part of the program.

This procurement aims to establish a single-award Indefinite Delivery Indefinite Quantity (IDIQ) for conserving and maintaining architectural elements in the purview of the Architect of the Capitol in the Senate Office Buildings in order to keep them in excellent condition. Individual task orders will be issued for on-site and off-site conservation and maintenance.

3.0 SCOPE OF WORK

The Offeror shall conserve and maintain brass and ornamental doors, historic mirrors, lighting fixtures, gates, panels and railings, plaster friezes, painted metal sculpture, and other architectural elements of the Senate Office Buildings. This work may include emergency conservation projects for fine art, fine art and sculpture handling, paint analysis, and architectural fine art sculpture as deemed necessary by the Government.

All items are considered to be significant assets of the AOC. They shall be treated with the utmost care to avoid damage, and services shall be conducted in accordance with the AOC Preservation Policy and Standards.

All work performed, including materials and methods used, shall be documented and submitted to the AOC Contracting Officer’s Representative (COR) as part of the deliverables. This includes photographs before, during, and after restoration. The Contractor shall provide a custody receipt for restoring any fixture taken off campus.

4.0 REQUIRED SERVICES

All work shall comply with the American Institute for Conservation of Historic and Artistic Works (AIC) Code of Ethics and Standards of Practice and all applicable codes.

The Offeror shall provide a Senior Conservator and Conservation Technician who meets the requirements in the Key Personnel section 19.0.

The Senior Conservator and Conservation Technician are expected to perform maintenance and conservation work as needed on site approximately 60 person-days per year—not to exceed eight (8) trips, with the timing flexible. The approximation of 60 days for the maintenance and conservation work does not include the time for any emergency work or individual task orders that may be issued for other on-site and off-site maintenance and conservation.

5.0 REQUIREMENTS FOR MAINTENANCE

1. The Senior Conservator shall thoroughly inspect each painted metal sculpture, frieze, and architectural element and alert the COR by the end of the next business day of conservation work needed for damage and problems, including abraded patination, degraded coatings, and corrosion. The Conservation Technician shall perform required maintenance on various painted metal sculptures, architectural elements, lighting, and historic mirrors in the Senate Office Buildings under the guidance of the Senior Conservator. The required maintenance includes thoroughly dusting each element, including high dusting from a ladder or Denka atrium lift, using brushes and a HEPA vacuum, removing minor accretions, and applying and buffing a coat of microcrystalline to frequently-touched areas of the brass and bronze elements. Certain elements, especially brass and bronze ornamentations, may be subject to more significant dust accumulation or abrasion because of their location or material and may need to be cleaned more often. These elements will be identified in consultation with the COR and the Office of the Senate Curator. The Technician shall perform maintenance on each designated painted metal sculpture one (1) to four (4) times a year, dependent on differing painted metal sculpture and site conditions, unless conservation work is planned in the near future or has been recently completed. The Technician shall meet with the COR at the beginning of each on-site work period.

2. The Senior Conservator shall inspect, produce and submit a written report for each maintenance trip, including a list of materials used. The report generated is named the Maintenance Report detailed in Section 30.3. The report must include treatment dates and for each asset name, location and treatment summary. Select photographs before, during, and after treatment with captions must be included.

6.0 REQUIREMENTS FOR CONSERVATION AS NEEDED

1. The Senior Conservator shall perform the conservation of elements identified during the maintenance inspection as needing conservation work. If requested by the COR, the Senior Conservator shall provide a treatment proposal and cost estimate.

2. The Senior Conservator shall perform the following conservation work identified as needed during the maintenance inspection:

• Document current conditions. If requested, provide a treatment proposal and cost estimate;

• Remove dust with soft brushes and HEPA vacuums;

• Clean all surfaces using surfactants and rinse;

• Reattach broken pieces, fabricate and attach missing pieces, and patinate or in-paint as needed; and

• For bronze elements, patinate and or in-paint locally as needed. Apply and buff with microcrystalline wax or lacquer.

7.0 REQUIREMENTS FOR EMERGENCY SERVICES

The following are the requirements for emergency services:

7.1 Emergency services shall be performed by and under the direction of the Senior Conservator.

7.2 The Contractor shall be on-site within 48 hours of being notified by the Curator or COR via telephone or email if needed for emergency treatment of painted metal sculptures and fine architectural art damaged by impact, water leaks, etc.

7.3 Examine painted metal sculpture and architectural elements, document, and assess condition.

7.4 Provide estimates for time, materials, and equipment needed for emergency treatment.

7.5 Carry out needed emergency treatment as soon as authorized by the Contracting Officer (CO) and COR. (The emergency treatment may be billed under the maintenance with conservation as needed contract line item number (CLIN) or a separately issued task order. The decision as to whether or not a separate task order is required will be made when the emergency service is identified).

7.6 Submit a report documenting emergency treatment and recommendations for additional needed treatment.

Note: The Architect of the Capitol will provide access by means of ladders or lift for emergency services as needed.

8.0 APPLICABLE POLICIES AND STANDARDS

The following policies and standards are applicable to this requirement and are available upon request:

• AOC Guidelines for Conservation Reports and Photo Documentation (November 2011);

• AOC Guidelines for Conservators Regarding the Handling of Hazardous

Materials/Hazardous Waste (June 2011); and

• AOC Preservation Policy and Standards.

The Contractor shall not deviate from any of the above documents without express approval granted by the COR.

9.0 TASKS

Typical task orders against this IDIQ may include but are not limited to the following.

9.1 Calder Mountains Sculpture Cleaning and Maintenance

The objective of this task order is for the conservation and maintenance of the Calder Mountains Sculpture in the Hart Senate Office Building. This individual task order will be issued for on-site conservation and maintenance only.

9.2 Historic Mirror Cleaning and Condition Assessments

The objective of this task order is for in-situ cleaning and condition assessment of historic mirrors in the Russell Senate Office Building. The cleaning shall correct any issues related to debris related contaminants and to restore the original appearance. The mirrors are considered significant and irreplaceable historic assets of the AOC. They shall be treated with the utmost care to avoid damage and in accordance with the AOC Preservation Policy and Standards.

9.3 Russell 8-Arm Chandelier Re-Plating and Restoration

The objective of this task order is for the re-plating and restoration of 8-arm chandeliers from the Russell Senate Office Building. The restoration shall correct any issues related to corrosion and restore to its original appearance. These lighting fixtures are considered to be significant assets of the AOC. They shall be treated with the utmost care to avoid damage and services shall be conducted in accordance with the AOC Preservation Policy and Standards.

9.4 Committee Room Chandelier and Wall Sconce Cleaning and Condition Assessments

The objective of this task order is for the safe cleaning and restoration of nickel-plated chandeliers and wall sconces in the Russell Senate Office Building. The restoration shall correct any issues related to corrosion and to restore the original appearance. These lighting fixtures are considered to be significant assets of the AOC. They shall be treated with the utmost care to avoid damage and services shall be conducted in accordance with the AOC Preservation Policy and Standards.

9.5 Art and Sculpture Handling

The objective of this task order is for the safe handling of artwork and sculptures in the Senate Office Buildings. These items are considered to be significant assets of the AOC. They shall be treated with the utmost care to avoid damage and services shall be conducted in accordance with the AOC Preservation Policy and Standards.

10.0 DELIVERABLES AND DELIVERY SCHEDULE

10.1 Kick-Off Meeting

The awarded Contractor shall host a Kick-Off meeting with the Contracting Officer, Contracting Officer’s Representative (COR), and Curator to review the IDIQ, locations of the painted metal sculpture to be conserved, and the logistics of the IDIQ.

10.2 Transition-In Plan

The contractor shall be responsible for the transition of all technical activities identified in this requirement. The contractor shall submit a final Transition-in Plan within 14 days after contract award reflecting all necessary activities to facilitate the transition of services to the contractor and expected completion dates of those activities. All activities must be completed within 30 days after the kickoff meeting. The following technical activities must be included as part of the Transition-in Plan:

• Inventory and orderly transfer of all Government Furnished Equipment and Property (GFE/GFP), software and licenses;

• Transfer of current project activities;

• Workplace logistics and staffing plan;

• Coordination of knowledge transfer sessions with the incumbent contractor; and

• Anticipated Entry of Duty (EOD) dates for all contractor staff.

The Transition-in Plan shall be approved by the COR and describe the contractor’s process for transitioning from the incumbent with no disruption in operational services.

10.3 Project Management Plan

The contractor shall submit a Project Management Plan 30 days after award that outlines the project execution and project control approach, roles, responsibilities, cost, schedule, and scope. The plan shall be used to facilitate key decision points, milestones, and communication among key stakeholders.

10.4 Weekly Status Report

The contractor shall prepare a weekly status report. The intended audience includes Government and contractor project managers. During the period of performance, the contractor shall attend weekly progress meetings to be held in-person or via teleconference.

Weekly status reports are due by 12:00 PM Eastern Time on Thursday. The weekly status report shall include:

• Accomplishments - Description of work accomplished;

• Planned Activities - Work planned for the following week;

• Milestone Schedule - Work planned out to six months;

• Quality Assurance - Compliance to Quality Assurance tasks;

• Scope Change - Deviations from planned tasks; and

• Open Issues - Outstanding issues and risks to including remediation plan.

10.5 Monthly Status Report

The contractor shall prepare a monthly status report. The intended audience includes senior management and executive leadership from the Government and from the contractor.

Monthly status reports are due by the 5th day of each months for actions that occurred during the previous month

The contractor shall include historical information for trending purposes, and include the following elements:

• Milestone Schedule - An outlook on the milestones and deliverables 6-12 months out.

• Quality Assurance - Compliance to Quality Assurance tasks;

• Scope Change - Deviations from planned tasks

• Open Issues - Issues and risks summary

10.6 Government Furnished Equipment / Property (GFE/GFP) Inventory Report

The Contractor shall provide their own materials and equipment. The Government will provide the Contractor with access to running water and electricity and provide access by means of ladders or lift for emergency services as needed. Arrangements can be made for dropping off equipment and supplies. Storage space for equipment and supplies may be available.

10.7 Transition-Out Plan

Not applicable to this requirement.

10.8 Delivery Instructions

The Contractor shall provide the conservation report in accordance with the IDIQ “Attachment 1 - Guidelines for Conservation Reports and Photo Documentation”. The Contractor shall provide the maintenance report to the COR in both electronic and hard copy format. The electronic copy shall be emailed to the COR.

The Contractor shall provide electronic copies of the conservation report for review, approval, and appropriate action. Electronic copies shall be delivered via email attachment to the Contracting Officer (CO) and COR as appropriate. The electronic copies shall be compatible with Microsoft Office 2010 or other applications as appropriate and mutually agreed to by the parties.

The Contractor shall follow the invoicing instructions outlined in the contract to submit their invoices.

Once created, deliverables and work products are considered the property of the Federal Government.

The deliverables shall be considered final upon receiving Government approval. The Government shall provide written notification of acceptance or rejection of all deliverables, with the exception of invoicing, within two (2) days of receipt. Approval or rejection of invoicing is within 30 days. All notifications of rejection will be accompanied with an explanation of the specific deficiencies causing the rejection. Items must be approved by the CO and COR to be considered “accepted.”

Deliverables shall be deemed acceptable if the document adequately covers all required topics, meets general quality measures, and is professionally prepared in terms of accuracy, clarity, format, and timeliness. Quality measures, as set forth below, shall be applied to each work product received from the Contractor.

• Accuracy: Documents shall be accurate in presentation, content, and style;

• Clarity: Documents shall be clear and concise;

• File Editing: Documents shall be editable by the Government;

• Format: Documents shall be transmitted via mutually agreed upon media; and

• Timeliness: Documents shall be submitted on or before scheduled due date.

11.0 QUALITY ASSURANCE SURVEILLANCE PLAN (QASP) / QUALITY CONTROL PLAN (QCP)

The Contractor shall meet with the COR on a daily basis when on-site to review the progress and acceptability of the work, i.e., to determine if it is in 100% accordance with the stated requirements. If the COR determines that the work does not meet the stated requirements, the Contractor shall be responsible for correcting the issue at its own cost until accepted by the

COR.

The Government reserves the right to use other performance metrics at the individual task order level.

12.0 GOVERNMENT FURNISHED EQUIPMENT / PROPERTY (GFE/GFP)

The Government will provide the Contractor with access to running water and electricity and provide access by means of ladders or lift for emergency services as needed. Arrangements can be made for dropping off equipment and supplies. Storage space for equipment and supplies may be available.

Any equipment or property furnished by the Government to the Contractor to perform work under this requirement shall be returned to the Government at the end of the period of performance.

13.0 CONTRACT TYPE

This contract is a single award IDIQ contract. It is anticipated that the “maintenance with conservation as needed” requirements’ task orders will be issued on a labor-hour basis as the total amount of conservation needed for all the painted metal sculptures in the Senate Office Buildings cannot be predicted at the time of task order issuance. Separate task orders for unique or more in-depth conservation of specific pieces will be issued on a firm-fixed-price (FFP) basis.

14.0 PERIOD OF PERFORMANCE

One (1) 12-month Base Year plus four (4) 12-month option years from date of award.

14.1 FUNDING

Funding will not be obligated to the IDIQ contract. Funds will be provided for each task order unless the AOC is operating under a Continuing Resolution (CR). If a task order is issued during a CR, it will be issued in accordance with clause AOC52.232-13 Availability of Funds – Continuing Resolution (Dec 2006).

14.2 PRIVACY ACT

The Contractor will not have access to Personally Identifiable Information (PII) in the course of this contract.

15.0 PLACE OF PERFORMANCE/HOURS OF OPERATION

In most cases, painted metal sculpture maintenance and conservation work must be performed outside of public hours, from 9:00 a.m. to 4:30 p.m., Monday through Saturday. Work may be performed on Sundays when the building is closed to the public, but the Contractor must schedule a time during the normal office hours to meet with the Curator and COR. Work may also be permitted during public hours in low-traffic areas during recesses of the Senate.

If hot patina is needed, work must be done outside public hours, with special hot-work permits approved 48 hours before the start of the work. The Contractor shall submit the request for permits to the COR.

16.0 TELEWORK

Telework will not be authorized under this requirement.

17.0 OTHER DIRECT COSTS (ODC)

The Contractor may be required to buy supplies to support the requirements of this SOW.

Supply purchases must be approved in advance by the COR for reimbursement and shall remain the property of the Government. Such ODCs may include:

• Unique project equipment

In addition to adherence to the security standards outlined below, Commercial Off-The-Shelf (COTS) and Government Off-The-Shelf (GOTS) products shall be approved through the Information Technology Division (ITD) prior to purchase and implementation.

18.0 TRAVEL

Travel will be authorized under this requirement. Costs for transportation, lodging, meals and incidental expenses incurred by the Contractor on official company business are allowable and are subject to FAR 31.205-46, Travel Costs. These costs will be considered to be reasonable and allowable only to the extent that they do not exceed on a daily basis the maximum per diem rates in effect at the time of travel as set forth in the Federal Travel Regulations (FTR). The Contractor will not be reimbursed for travel and per diem within a 50 mile radius of the worksite where a contractor has an office. A worksite is the same as a contractor’s place of performance location. All travel outside of the Washington Metropolitan area must be approved by the COR in advance. No travel will be reimbursed without prior approval from the COR. If the Contractor is required to travel outside of the Washington Metropolitan area, the Contractor shall provide the COR with a completed Request for Travel Authorization Form at least 10 calendar days prior to the requested travel date. The Contractor shall not incur costs in excess of the funded value of travel, without prior written approval from the CO.

19.0 KEY PERSONNEL

The Government has identified the need for two (2) key personnel under this requirement. The Contractor shall propose a Senior Conservator and a Conservation Technician who meet the required skills outlined below. Required certifications may be substituted with experience, provided a written justification is approved by the Government and the labor rate is reduced by 15%. Key personnel must exhibit critical soft skills including:

• Excellent active listening and verbal communication skills;

• Strong business writing ability;

• Flexible and adaptable attitude;

• Can conform to shifting priorities, demands, and timelines;

• Ability to elicit cooperation from a wide variety of stakeholders; and

• Ability to discuss technical issues with non-technical, executive-level government officials.

19.1 Senior Conservator

The Senior Conservator shall have overall responsibility of task order activities: planning, organizing, directing, controlling, staffing and reporting status, deliverables and schedules to the Government.

Required Skills/Experience:

The Senior Conservator shall be a Professional Associate or Fellow of the American Institute for Conservation (AIC) to serve as the Project Director for a task order. The Senior Conservator shall have professional training in object conservation at an accredited institution resulting in a master’s degree or 10 years of comparable training and experience as well as experience as the Project Director on at least five (5) similar bronze or marble sculpture conservation projects. The number of years of experience shall be calculated in accordance with AIC’s standards. The Senior Conservator is expected to be on-site the majority of the time work is under way, providing guidance to the Conservation Technician on maintenance and performing conservation work.

19.2 Conservation Technician

The Conservation Technician shall have a bachelor’s degree from an accredited school, college, university or a minimum of four (4) years of comparable training and experience performing the same functions as outlined in this SOW on at least three (3) sculpture conservation projects in the past five (5) years to be considered qualified.

20.0 SUBSTITUTION OF PERSONNEL

Key personnel are critical to performance under this requirement. During the period of performance, key personnel shall only be replaced with people of comparable education and experience levels. The Contractor shall obtain approval from the Government prior to replacement of any key personnel.

No changes in key personnel shall be made unless the Contractor can demonstrate that the qualifications of prospective replacement personnel are equal to or better than the qualifications of the key personnel being replaced. The CO shall be notified in writing of any proposed substitution at least 15 calendar days in advance of the proposed substitution. Such notification shall include:

• An explanation of the circumstances necessitating the replacement;

• A resume of the proposed substitute that outlines their education, and basic and specialized experience; and

• As requested by the CO or COR, any other information, which will enable them to judge, whether or not the Contractor is maintaining the same level of high-quality key personnel.

The Government will evaluate key personnel substitutions. The CO will promptly notify the Contractor of their approval or disapproval in writing. All disapprovals will require submission of another substitution to fill key positions within 15 calendar days from the date the Contractor was notified.

Additionally, the Contractor shall immediately replace any individual under this statement of work who fails to perform their duties adequately, is chronically absent/late, or conducts themselves in a manner that is inconsistent with AOC policies and practices, or engages in practices that are disruptive to the working environment.

21.0 PERSONAL SERVICES

Personal services are not authorized under this requirement.

22.0 INVOICING

The Contractor shall follow the invoicing instructions outlined in clause AOC52.232-1 when submitting invoices. The AOC will approve or reject an invoice within 30 days.

23.0 SECURITY

All contractor employees shall submit an E-Verify form and a United States Capitol Police background check form (CP-491) prior to the performance of work. Contractor employees shall also complete a contractor badging request form. All members of the team working on-site will be required to wear an identification badge at all times. On-site work may be interrupted because of Congressional events or U.S. Capitol Police requirements. All work to be performed is subject to Government interruptions.

Please be advised, the AOC does not follow certain exceptions as described in the E-Verify federal contractor rule. Contractors are required to use E-Verify to verify that all employees working on AOC contracts are authorized to work in the United States.

24.0 SAFETY

The Contractor shall comply with all AOC safety policies and shall require all employees to wear appropriate clothing apparel for the assigned tasks. No sandals or any style of open-toe shoes shall be allowed for any position that requires lifting of 5lbs or greater as this would pose a risk of injury.

If solvents are to be utilized, the Contractor must provide a Ventilation and Solvent Control Plan as well as SDS for approval before beginning on-site work. No solvents may be stored in the Senate Office Buildings (See Architect of the Capitol “Guidelines for Conservators Regarding the Handling of Hazardous Materials/Hazardous Waste”). The Contractor is responsible for controlling dust-generating activities.

All surrounding surfaces shall be considered historic and shall be protected during treatment.

25.0 ENERGY EFFICIENCY / COMPLIANCE

There are no special energy efficiency requirements. The Contractor shall minimize energy use while on Government site.

26.0 SUSTAINABILITY

This is not applicable to this requirement.

27.0 POINTS OF CONTACT

Contracting Officer Tatjana Johnson Phone: 202.262.0934 Email: Tatjana.johnson@aoc.gov

Contracting Officer’s Representative Kirby Broughton

Phone: 202.224.7990 Email: Kirby.Broughton@aoc.gov

28.0 ACRONYMS

AIC - American Institute for Conservation of Historic and Artistic Works

AOC - Architect of the Capitol

CO - Contracting Officer

COR - Contracting Officer’s Representative

FFP - Firm-Fixed-Price

GFP - Government Furnished Property

OSHA - Occupational Safety and Health Administration

SDS - Safety Data Sheets

29.0 SPECIFIC REQUIREMENTS

29.1 PROPOSAL SUBMISSION

The Offeror shall follow the proposal submission instructions found in Section L of this solicitation package and AOC52.215-1 Instructions to Offerors.

29.2 TRAVEL COSTS

All transportation and travel will be provided by the Contractor. No separate line items for reimbursable expenses will be included in the IDIQ or future task orders.

30.0 DELIVERABLES AND REPORTS

30.1 FINAL CONSERVATION REPORTS

The final conservation report with photo documentation shall be submitted no later than 45 days after the completion of conservation treatment per “AOC Guidelines for Conservation Reports and Photo Documentation.”

30.2 MAINTENANCE REPORT

A maintenance report for each trip shall be submitted no later than 45 days after the completion of treatment. The report must include treatment dates and for each individual sculpture and architectural element, location, and a summary of the treatment. Select photographs before, during, and after treatment with captions must be included.

mailto:Kirby.Broughton@aoc.gov

30.3 DELIVERY INSTRUCTIONS

The Contractor shall provide the conservation report in accordance with AOC’s Guidelines for Conservation Reports and Photo Documentation. The Contractor shall provide the maintenance report to the COR in both electronic and hard copies. The electronic copy shall be emailed to the COR.

30.4 INSPECTION AND ACCEPTANCE

Inspection and acceptance shall be accomplished in accordance with the contract clauses.

If any of the services do not conform to contract requirements, the Government may require the Contractor to perform the services again in conformity with contract requirements at no additional cost to the Government within the period of performance.