Rehabilitate the Arts of War and Arts of Peace Statutes Scope of Work

PROJECT SUMMARY:

This project consists of the full conservation and regilding of four (4) monumental equestrian bronze sculptures comprising the Arts of War and Arts of Peace statuary groups located at the eastern terminus of Memorial Bridge and the southern terminus of Parkway Drive, respectively, in Washington, DC. Work includes comprehensive bronze conservation treatment; application of 30-gram, 23.75 karat gold leaf; cleaning and repair of associated granite plinths; installation of scaffold and containment systems, environmental protection measures; and full documentation of treatment activities. All work shall comply with the Secretary of the Interior’s Standards for the Treatment of Historic Properties and shall be completed no later than July 1, 2026.

PART 1 – GENERAL

ITEM 1 – DESCRIPTION OF WORK

1.1 Background

The Arts of War and Arts of Peace statues are monumental equestrian bronze sculptures located at prominent ceremonial gateways in Washington, DC. The Arts of War statues are situated at the terminus of Memorial Bridge under the jurisdiction of the George Washington Memorial Parkway (GWMP), while the Arts of Peace statues are located along Parkway Drive behind the Lincoln Memorial under the jurisdiction of National Mall and Memorial Parks (NAMA).

These statues are significant historic and artistic resources within the National Park Service (NPS) portfolio and are considered contributing features to the historic monumental core of Washington, DC, and associated National Register-eligible cultural landscapes. As such, they are subject to preservation under the Secretary of the Interior’s Standards for the Treatment of Historic Properties (SOI Standards). Previous conservation investigations have identified deterioration and loss of existing gilded finishes, soiling of exterior surfaces, and localized corrosion of bronze substrates.

The primary objective of this project is the full conservation and regilding of all exterior bronze surfaces, including decorative elements of the plinths (bronze stars and incised lettering) to restore visual integrity, ensure long-term protection, and maintain historic character. Secondary work includes cleaning and repair of associated granite plinths.

1.2 Work Covered by the Contract Documents

Project Locations:

• Arts of War Statues – Memorial Bridge Terminus, Washington, DC (GWMP Jurisdiction)

• Arts of Peace Statues – Parkway Drive (behind Lincoln Memorial), Washington, DC (NAMA Jurisdiction)

Work consists of, but is not limited to, the following:

General Dimensional Information (for Contractor Planning):

• Each equestrian sculpture is approximately 15 to 20 feet in height from top of plinth to highest point of sculpture.

• Granite plinths are approximately 10 to 15 feet in height

• Overall working height including plinth and sculpture may exceed 30 feet.

• Contractor shall field verify all dimensions, access constraints, and surface areas prior to execution and shall not rely solely on these approximations for bidding or construction.

A. Bronze Conservation and Gilding (Primary Scope):

• All conservation work shall be performed in accordance with the American Institute for Conservation (AIC) Code of Ethics and Guidelines for Practice, in addition to the Secretary of the Interior’s Standards for the Treatment of Historic Properties.

• Conservation treatment of four (4) monumental equestrian bronze sculptures, including:

o Bronze horse and rider assemblies o Gilded bronze stars mounted to plinths

• Removal of failed coatings, corrosion products, and contaminants using conservation-grade methods in accordance with SOI Standards and applicable ASTM guidelines.

• Full surface preparation including cleaning, stabilization, and repair of all accessible bronze substrates.

• Repair of pits, cracks, casting voids, failed joints, and deteriorated areas using conservation-grade, compatible materials in accordance with AIC guidelines.

• Application of corrosion-inhibiting primer system (zinc chromate or approved equal compatible with gilding system

• Application of 30-gram, 23.75 karat gold leaf, including size, sealers (if applicable), and burnishing.

• Application of clear, protective wax coating

• All materials shall be physically and chemically compatible, appropriate for exterior monumental sculpture, and applied in strict accordance with manufacturer requirements. It remains the responsibility of the Contractor to submit all proposed products for acceptance by the Government.

B. Granite Plinth Cleaning and Repair (Secondary Scope):

• Cleaning of granite plinths using non-destructive, low-pressure methods in accordance with ASTM C1515.

• Repointing and repair of joints using compatible mortar per ASTM C1196.

• Crack repair and localized stone patching using color- and texture-matched materials.

• Incised lettering in the granite plinths that has previously been gilded shall be cleaned, properly prepared to receive gilding, and re-gilded consistent with the monumental sculptures and decorative stars.

C. Access and Temporary Structures:

• Design, engineering, installation, and removal of scaffold systems in accordance with OSHA 29 CFR 1926 Subpart L.

• Scaffold systems shall include full enclosure, debris containment, and environmental control capability.

D. Environmental Protection and Containment:

• Provide full containment of all debris, dust, cleaning agents, and runoff.

• Implement runoff capture systems to prevent contamination of adjacent surfaces and waterways.

• Protect adjacent historic features including sidewalks, balustrades, curbs, and roadways.

• Protect natural resources including turf, trees, and waterways in accordance with EPA and NPS environmental policies.

E. Documentation and Testing:

• Pre-construction condition documentation

• Mock-up preparation and approval

• Continuous photographic documentation

• Final conservation treatment report

F. Coordination:

• Coordination with GWMP and NAMA jurisdictions

• Coordination of pedestrian routing and public safety

All work shall be performed under a single contract.

1.3 Period of Performance

• Start Window: As soon as possible following award (mobilization approximately May 1, 2026 or sooner)

• Mandatory Completion Date: July 1, 2026

• Contractor shall be fully demobilized and all site restoration complete by this date.

• No delays or sequencing conflicts shall relieve Contractor of this requirement without written CO approval.

• Contractor shall provide sufficient staffing, multiple work crews, extended shifts, or concurrent work operations as necessary to meet the mandatory completion date.

ITEM 2 – EXISTING UTILITIES

Contractor shall verify all utilities prior to disturbance per OSHA 1926 Subpart P and local requirements.

ITEM 3 – CONTRACTOR’S USE OF PREMISES

3.1 Conduct of Operations

Contractor shall comply with all NPS regulations and minimize disruption to the public.

3.2 Work Hours

Standard: 7 AM – 5 PM, Mon–Fri. Extended hours or weekend work require written approval from the Contracting Officer.

3.3 Site Use and Access

• Contractor shall submit site logistics plan showing scaffolding, staging, pedestrian routing, and containment zones.

• Access methods are Contractor’s responsibility.

3.4 Public Protection

• Scaffold shall be fully enclosed (scrim, other) and secured against unauthorized access, to protect the public, resources, and the Contractor.

• Scaffold shall not mechanically attach to the sculptures, plinths, or any other components of the site. Protect all surfaces where scaffold member may come into contact with the sculpture.

• Provide anti-climb barriers and lockable access to each scaffold tower.

• Provide pedestrian protection systems per OSHA.

• Contractor shall perform and document daily inspections of all barriers, enclosures, and public protection systems to ensure integrity, stability, and compliance.

Inspection logs shall be maintained on-site and made available to the COR upon request.

3.5 Environmental Protection

• Full containment required.

• Prevent runoff and contamination per EPA standards.

3.6 Housekeeping

Maintain clean site daily.

3.7 Fire and Life Safety

Comply with NFPA 241 and OSHA 1926.

ITEM 4 – COMMENCEMENT, PROSECUTION, AND COMPLETION

Submit a detailed, fully resource-loaded construction schedule (baseline schedule) in bar chart (Gantt) format that clearly defines all phases, sequencing, durations, and interdependencies of work. Schedule shall, at a minimum, include mobilization, submittals and approvals, procurement of long-lead materials (including gold leaf), mock-up execution and approval, surface preparation, conservation repairs, priming, gilding (by statue and/or phased grouping), granite work, inspections, punch list, demobilization, and site restoration.

Schedule shall identify critical path activities and include concurrent/phased work strategies necessary to meet the mandatory completion date. Contractor shall update the schedule bi-weekly and with each pay application, reflecting actual progress and any adjustments. Failure to provide an adequate schedule or maintain progress in accordance with the approved schedule shall be grounds for corrective action as directed by the Contracting Officer.

ITEM 5 – EXAMINATION OF SITE

Contractor shall be fully responsible for verifying all existing site conditions prior to commencement of work, including but not limited to dimensions, access constraints, surface conditions, extent of deterioration, existing coatings, environmental conditions, and impacts to adjacent features.

Contractor shall conduct a thorough site investigation and field verification of all conditions that may affect means and methods, sequencing, safety, access, and cost. This includes verification of scaffold access points, staging areas, pedestrian interfaces, and proximity to roadways and sensitive resources.

No additional compensation or time extension will be granted for conditions that were reasonably observable during a site visit or could have been identified through proper investigation. Contractor shall promptly notify the Contracting Officer (CO) and Contracting Officer’s Representative (COR) of any unforeseen or concealed conditions that differ materially from those observed or anticipated, prior to proceeding with affected work.

ITEM 6 – ABBREVIATIONS

Follow National Park Service (NPS) standards and applicable industry standards including

ASTM International (ASTM), Occupational Safety and Health Administration (OSHA)

Environmental Protection Agency (EPA)

American National Standards Institute (ANSI)

Secretary of the Interior’s Standards for the Treatment of Historic Properties (SOI Standards).

ITEM 7 – ACCIDENT PREVENTION

Submit a site-specific Accident Prevention Plan (APP) in accordance with OSHA 29 CFR 1926 requirements. The APP shall be project-specific (generic plans will not be accepted) and shall address all phases of work including scaffolding, containment, conservation activities, and work at height.

The APP shall include, at a minimum:

• Identification of a qualified Site Safety and Health Officer (SSHO) responsible for implementation and enforcement of the APP

• Detailed Job Hazard Analyses (JHAs) for each major phase of work including cleaning, repairs, priming, gilding, scaffold erection, and demobilization

• Fall protection plan in accordance with OSHA 1926 Subpart M, including tie-off requirements, anchor points, and rescue procedures

• Scaffold safety plan in accordance with OSHA 1926 Subpart L, including erection, inspection, and load requirements

• Hazard communication program including Safety Data Sheets (SDS) for all chemicals and materials used

• Procedures for handling, storage, and disposal of hazardous and non-hazardous materials

• Emergency response procedures including evacuation routes, nearest medical facilities, and communication protocols

• Fire prevention and protection measures in accordance with NFPA 241

• Public protection measures and coordination with site safety controls

• Training requirements and documentation for all personnel

The APP shall be submitted, reviewed, and accepted prior to the preconstruction conference and issuance of the Notice to Proceed. Contractor shall implement and maintain the APP throughout the duration of the project, including regular safety meetings, inspections, and updates as required.

ITEM 8 – PRECONSTRUCTION CONFERENCE

Mandatory attendance is required. A preconstruction conference shall be conducted and completed prior to issuance of the Notice to Proceed (NTP). Work shall not commence until the preconstruction conference has been held and all required preconstruction submittals have been reviewed and accepted.

The preconstruction conference shall include, at a minimum, discussion and review of the following:

• Project scope, sequencing, and schedule, including critical path activities and coordination between statue locations

• Conservation Treatment Plan and mock-up approach

• Submittal requirements and approval processes

• Site logistics, access, scaffolding, and containment systems

• Environmental protection measures and runoff control

• Public protection and pedestrian routing

• Safety requirements, including Accident Prevention Plan and Job Hazard Analyses

• Quality control procedures and inspection requirements

• Temporary utilities and environmental control systems

Attendance by the Contractor’s Project Manager, Site Superintendent, QC Manager, and key subcontractors (including conservation and gilding specialists) shall be required.

ITEM 9 – SUBMITTALS

9.1 Required Submittals

• Treatment Plan (step-by-step)

• Gold leaf product information, including weight and purity

• Product data

• Environmental control plan

• Scaffold plan - shall be engineered and stamped by a Professional Engineer, registered in the District of Columbia.

• Mock-up plan

• Schedule

• Safety plan

• Waste plan

• Supplier certification of gold leaf confirming minimum 23.75 karat purity, 30-gram weight

• Batch traceability documentation for gold leaf materials, including manufacturer, lot numbers, and delivery records

9.2 Mock-Up Requirement

• Mock-up area shall be of sufficient size and complexity to be representative of the work, including curved surfaces, detailed elements, and figural sculpture versus decorative bronze star.

• Minimum mock-up extent shall include no less than 5 square feet of surface area or a discrete, visually and technically representative portion of the sculpture, as approved by the COR.

• Provide full system mock-up

• Must be approved prior to the full implementation of work

• Approved mock-up shall remain as part of final work

ITEM 10 – TEMPORARY SERVICES

Contractor shall provide all temporary utilities, equipment, connections, and distribution systems necessary to perform the work.

Water Service: Contractor shall provide temporary water for cleaning, surface preparation, and other construction activities. Contractor shall provide water via tanker or other approved means.

Electric Power: Contractor shall provide temporary electrical power for all construction operations including lighting, tools, environmental control systems (heating, cooling, dehumidification), and containment systems. Contractor shall provide generators as necessary. All electrical systems shall comply with NEC, OSHA 29 CFR 1926 Subpart K, and grounding requirements.

Environmental Control Systems: Contractor shall provide all temporary systems required to maintain environmental conditions necessary for conservation and gilding work, including but not limited to temporary enclosures, heating units, air conditioning, dehumidification equipment, and monitoring systems.

Lighting: Provide temporary task lighting sufficient to safely perform detailed conservation and gilding work, including color-correct lighting where necessary to evaluate surface finishes.

Sanitary Facilities: Contractor shall provide portable toilet facilities for personnel in accordance with OSHA requirements. Facilities shall be properly maintained, serviced, and located in approved areas.

All temporary services shall be included in the contract price and shall be removed upon completion of the work. Contractor shall restore all areas impacted by temporary utility installations to original condition.

ITEM 11 – PROJECT CLOSEOUT

Submit final treatment report, photos, and warranties.

PART 3 – EXECUTION

3.1 Mobilization

Provide full mobilization including delivery, staging, erection, maintenance, and removal of all scaffolding, containment systems, and associated temporary works in accordance with OSHA 29 CFR 1926 Subpart L and all applicable ANSI standards.

Scaffolding shall be designed to safely access all portions of the sculptures and plinths, accounting for complex geometry, varying elevations, and restricted site conditions.

Scaffold design shall accommodate work platforms, material handling, environmental control systems, and worker safety, and shall be engineered as required.

Install full containment systems integrated with scaffolding, including impermeable sheeting, sealed joints, debris netting, and runoff collection systems to fully isolate work areas. Containment shall prevent release of dust, debris, cleaning agents, and coating materials into the surrounding environment.

Provide comprehensive site protection measures including, but not limited to:

• Protection of adjacent historic surfaces such as granite plinths, balustrades, sidewalks, and curbs using non-staining, impact-resistant coverings

• Protection of roadways and vehicular areas from falling debris and equipment damage

• Installation of ground protection systems (e.g., plywood, mats) to prevent damage to turf and landscaped areas

• Protection of nearby trees and vegetation in accordance with NPS requirements

• Installation of runoff containment and filtration systems to prevent contamination of stormwater systems and nearby waterways

All scaffold, containment, and protection systems shall be inspected daily and maintained in safe, fully functional condition for the duration of the project.

3.2 Documentation

Perform a comprehensive pre-construction condition survey and documentation of all sculptures, plinths, and adjacent features.

Survey shall include:

• Detailed assessment identifying corrosion, coating failure, cracks, biological growth, staining, previous repairs, and areas of deterioration

• High-resolution digital photographic documentation (minimum 8 MP) capturing overall views and detailed close-ups of all surfaces, including hard-to-access areas

• Annotated photo logs keyed to elevation views or diagrams identifying specific conditions and locations

• Documentation of existing gilding extents, adhesion failures, and areas of loss

• Identification of sensitive features requiring special protection during work

All documentation shall be organized in a structured format (PDF and image files) and submitted to the COR prior to commencement of conservation activities. This documentation shall serve as the baseline record for comparison throughout the project and at closeout.

3.3 Mock-Up

Execute a comprehensive, phased mock-up program and obtain written approval prior to proceeding with full production work.

Mock-ups shall be performed for EACH major phase of work, including:

• Cleaning (demonstrating proposed cleaning agents, dwell times, methods, and impact on substrate)

• Surface preparation and corrosion removal

• Bronze repairs (filling, patching, and surface integration techniques)

• Priming (including application method, thickness, and adhesion)

• Gold leaf

• Protective clear coating

Each mock-up shall:

• Be executed on representative areas including complex geometry, vertical and horizontal surfaces, and detailed elements

• Demonstrate full sequencing of materials and methods proposed for that phase

• Include environmental control conditions representative of actual working conditions

• Be documented with written procedures, product data, and photographic records

Mock-ups shall be reviewed and approved by the COR prior to proceeding to the next phase of work. Approval of one phase does not constitute approval of subsequent phases.

If mock-ups are rejected, Contractor shall revise methods and repeat mock-up process at no additional cost to the Government.

Approved mock-ups shall serve as the standard of quality for the project and shall remain in place as part of the completed work where feasible.

3.4 Cleaning

• Clean all bronze surfaces to remove soiling, corrosion products, failed coatings, biological growth, and any other contaminants that may interfere with adhesion of primer and gilding systems. Cleaning methods shall be conservation-grade, non-destructive, and appropriate for historic bronze, and shall be selected to achieve a sound, stable, and contaminant-free substrate.

• Use non-abrasive methods only unless specifically approved in writing by the COR.

Prohibited methods include sandblasting, grinding, or any aggressive mechanical abrasion that may damage the historic surface.

• Cleaning procedures shall include testing and adjustment of cleaning agents, dwell times, and techniques to ensure effectiveness without substrate damage.

• All residues from cleaning operations shall be fully removed and neutralized as required to ensure compatibility with subsequent primer and gilding applications.

• The goal of surface preparation is to achieve a clean, stable, and properly profiled substrate that will ensure a successful, durable, and long-lasting gilded finish.

• Capture, contain, and properly dispose of all runoff, debris, and waste materials generated during cleaning operations in accordance with EPA and NPS environmental requirements.

• 3.5 Repairs

Perform comprehensive bronze repairs based on conditions identified during the pre-construction documentation survey. Repairs shall address a range of deterioration types including, but not limited to, casting defects, corrosion-related material loss, failed previous repairs, open or deteriorated seams, cracking, pitting, and deformation.

Repair methodologies shall be specifically selected and tailored to the nature and severity of each condition and shall be consistent with AIC conservation guidelines and best practices for historic bronze.

Repair work may include, as appropriate:

• Stabilization and treatment of active corrosion, including chloride removal and passivation techniques

• Filling of pits, voids, and casting defects using compatible conservation-grade fill materials

• Rebuilding or fairing of deteriorated surfaces to restore intended profiles and visual continuity

• Repair and sealing of seams, joints, and connections to prevent moisture intrusion

• Removal and replacement or stabilization of failed previous repair materials that are incompatible or deteriorated

All repair materials shall be chemically and physically compatible with the existing bronze substrate and suitable for exterior exposure. Repairs shall be executed in a manner that is minimally invasive, visually integrated with surrounding surfaces, and reversible where feasible.

Repair procedures shall be tested and approved as part of the mock-up process prior to full implementation. All repaired areas shall be properly prepared to receive primer and gilding systems, ensuring a continuous, stable substrate for subsequent coatings.

3.6 Priming

Apply a corrosion-inhibiting, bonding primer system specifically formulated for exterior bronze substrates and compatible with the selected gilding system.

Primer shall:

• Provide effective corrosion resistance to the bronze substrate, including inhibition of future oxidation and environmental degradation

• Promote strong adhesion between the prepared bronze surface and gold leaf

• Be chemically compatible with all system components including cleaning residues (post-neutralization), repair materials, mordants/adhesives, and gold leaf

Primer selection shall be based on manufacturer recommendations, field testing, and approved submittals, and may include zinc chromate or approved equivalent systems specifically designed for historic metal conservation applications.

Application requirements:

• Apply primer only to properly cleaned, repaired, and prepared surfaces that are free of contaminants, moisture, and residues

• Apply in accordance with manufacturer specifications for thickness, coverage, environmental conditions, and curing times

• Verify adhesion through field testing as part of the mock-up process prior to full-scale application

• Ensure full and uniform coverage, including complex geometries, recesses, and joints

Primer application shall be included as part of the mock-up approval process and shall not proceed to production work until accepted. The completed primed surface shall provide a stable, continuous, and properly bonded substrate suitable for high-performance exterior gilding.

3.7 Gilding

• Apply 30-gram gold leaf with a minimum purity of 23.75 karat. Gold leaf shall be of consistent type, manufacturer, and batch to ensure uniform color, thickness, and visual appearance across all treated surfaces. Contractor shall procure sufficient quantities from a single manufacturer and production run where feasible to minimize variation.

• Gold leaf shall meet industry standards for exterior architectural gilding, including consistent thickness, absence of defects, and suitability for long-term exterior exposure. Supplier certification and batch traceability documentation shall be maintained and submitted.

• Gilding system (including size) shall be selected based on compatibility with primer and environmental exposure conditions, and shall be appropriate for exterior monumental sculpture.

• Application shall be performed by experienced gilding specialists using accepted industry techniques to achieve full, continuous coverage without holidays, voids, or inconsistencies.

• Gilding shall be applied only under environmental conditions that meet manufacturer requirements for temperature, humidity, and wind. Contractor shall implement environmental controls (enclosures, heating, cooling, dehumidification) as necessary to maintain required conditions.

• Final gilded surface shall exhibit uniform color, sheen, and appearance across all surfaces, including complex geometries and transitions, with no visible seams, overlaps, or inconsistencies.

• Apply protective clear wax coating over gilded surfaces to prolong the project lifespan of gilding.

• All gilding materials, including primer, size, gold leaf, and clear wax coating shall be installed in strict accordance with the written instructions and technical data provided by the manufacturer. Contractor shall comply with all specified requirements for surface preparation, environmental conditions, application methods, coverage rates, curing times, and sequencing to ensure system compatibility and long-term performance. Any deviations from manufacturer requirements must be submitted in writing and approved by the COR prior to implementation.

3.8 Environmental Controls

Maintain environmental conditions in strict accordance with manufacturer requirements for all conservation and gilding materials, including but not limited to temperature, relative humidity, and wind exposure. Contractor shall continuously monitor environmental conditions within the work enclosure using calibrated instruments and shall maintain conditions within acceptable ranges throughout all phases of priming and gilding operations.

Provide and operate temporary environmental control systems, including enclosures, heating, cooling, dehumidification, and ventilation equipment, as necessary to achieve and maintain required conditions. Conditions shall be stabilized prior to application and maintained for the full duration of application and curing periods.

Contractor shall record environmental data at regular intervals (minimum hourly during active work periods) including temperature, humidity, and other relevant parameters. Logs shall be maintained on-site and submitted to the COR on a weekly basis or upon request.

Failure to maintain required environmental conditions shall require suspension of work until compliant conditions are achieved.

3.9 Granite Work

Perform cleaning and repair of granite plinths using a phased, conservation-based approach. Initial cleaning shall consist of general cleaning to remove atmospheric soiling, biological growth (e.g., algae, lichen), and accumulated surface contaminants using low-pressure water washing and non-ionic or pH-neutral cleaning agents in accordance with preservation best practices. Following general cleaning, perform localized or targeted cleaning to address persistent staining, discoloration, or embedded contaminants using more controlled and specific methods (e.g., poultices, specialty cleaners) appropriate to the stain type and substrate condition.

All cleaning methods shall be tested and approved through the mock-up process prior to full implementation. Cleaning shall not damage the stone surface, alter natural patina, or cause etching or discoloration. Use findings from previous cleaning mock-up studies (provided) to inform sequencing.

Repairs shall include repointing of joints, crack repair, and localized patching using compatible materials matched in color, texture, and performance characteristics.

Deteriorated or failed joint materials shall be carefully removed and replaced in accordance with ASTM C1196. All repairs shall be executed to prevent water intrusion, maintain structural integrity, and preserve the historic appearance of the plinths.

Protect adjacent bronze elements during all cleaning and repair operations, and ensure all runoff, debris, and cleaning agents are fully contained and properly disposed of in accordance with EPA and NPS environmental requirements.

Granite repairs shall specifically include repointing of cracks and open joints using a compatible mortar system designed for historic granite. Mortar shall be matched in color, texture, composition, and permeability to the existing material to ensure compatibility and prevent future deterioration. Prior to repointing, existing deteriorated or failed joint material shall be carefully removed by hand using non-damaging methods to avoid spalling or edge loss of the stone. Joints and cracks shall be cleaned, prepared, and preconditioned as required to promote proper adhesion of new mortar.

Mortar installation shall be performed in lifts as required, properly tooled to match existing joint profiles, and cured in accordance with manufacturer recommendations and ASTM C1196. All repointing work shall be watertight, visually integrated, and designed to accommodate thermal movement and moisture transfer without causing stress to the surrounding stone.

Gild incised lettering on each granite plinths that have been previously gilded. Perform all cleaning and surface preparation required to promote adhesion of the gold leaf. Gild incised lettering consistent with the figural sculptures and bronze stars. The application of a clear, protective coating is not required on incised lettering unless specifically indicated by the manufacturer and recommended by the Contractor.

3.10 Protection

Maintain full containment systems and provide comprehensive protection of all surrounding features throughout the duration of the work.

Contractor shall ensure that all work areas are fully enclosed and isolated to prevent the release of dust, debris, cleaning agents, coatings, and other materials into the surrounding environment. Containment systems shall be continuously maintained in a sealed and functional condition.

Protect all adjacent historic and site features including, but not limited to, granite plinths, balustrades, sidewalks, curbs, roadways, and architectural elements from damage, staining, abrasion, and impact. Protective measures shall include non-staining coverings, rigid barriers, and impact-resistant materials as appropriate.

Provide ground protection systems to prevent damage to paved surfaces, lawns, and landscaped areas from construction activities, scaffolding loads, and equipment movement. Coordinate protection measures to prevent soil compaction and disturbance to turf and root zones of nearby trees.

Implement runoff control measures to ensure that all liquids generated during cleaning, repair, priming, and gilding operations are captured, filtered if necessary, and properly disposed of in accordance with EPA and NPS environmental requirements. No discharge to storm drains or natural waterways shall be permitted.

All protection systems shall be inspected daily and maintained in effective condition. Any damage to adjacent features or site elements resulting from construction activities shall be immediately reported and repaired by the Contractor at no additional cost to the Government.

3.11 QC

Provide dedicated QC oversight.

QC personnel shall include an experienced conservation specialist with demonstrated experience in historic metal conservation and gilding of monumental-scale sculptures. The designated QC lead shall have a minimum of five (5) years of relevant experience and shall be responsible for verifying compliance with approved treatment methods, material specifications, environmental controls, and workmanship standards throughout all phases of the work. QC personnel shall be present during all critical activities including cleaning, repair, priming, and gilding operations.

3.12 Completion

Remove all systems and restore site.

Contractor shall prepare and submit an as-built treatment document and report identifying all areas of the sculptures and plinths that were cleaned, repaired, primed, and gilded.

Documentation shall include annotated drawings, photographs, and written descriptions correlating treatment locations with materials and methods used. The as-built documentation shall be organized in a manner suitable for long-term asset management and future conservation reference.

END OF SECTION