B08_Att_1_SOW_Bathhouse_Mural_Maintenance_6_4_24.pdf

BATHHOUSE MURAL MAINTENANCE - 2ND FLOOR Page 1 of 7

SCOPE OF WORK

SAN FRANCISCO MARITIME NATIONAL HISTORICAL PARK

AQUATIC PARK BATHHOUSE

MURAL MAINTENANCE – SECOND FLOOR

JANUARY 29,2024

I. BACKGROUND

San Francisco Maritime National Historical Park’s (SAFR) Aquatic Park Bathhouse is a contributing structure to the Aquatic Park Historic District. The Bathhouse is decorated with extensive wall murals on multiple floors, in multiple rooms and exterior locations.

The National Park Service (NPS) maintains an ongoing, yearly maintenance program for the murals.

The second floor lobby murals have undergone extensive restoration and conservation, removing years of grime and repairing plaster, canvas and paint damage. The scope for those conservation projects included providing recommendations for ongoing maintenance and care of the murals. Those recommendations include regular examination, cleaning, maintenance, repainting and other repairs. The second floor exterior veranda murals have yet to undergo cleaning and treatment but are known to have detached tiles.

II. OBJECTIVE

The objective for this project is to hire an art conservator to conduct an examination of a limited selection of the murals, cleaning of same murals, limited cosmetic touch-ups, re-adhering of approximately 30 square feet of loose tiles and documenting in a treatment report the work conducted and any observed needed repairs that are beyond the scope of this project. Any work beyond the scope of work must be evaluated and approved by the Contracting Officer. Any work conducted without the approval of the Contracting Officer is at the risk of the Contractor.

III. SCOPE

This project is to examine, dust/clean, treat and report on the condition of murals in the following locations:

• Main Lobby; second floor of the Bathhouse – walls only, approximately 2,000 square feet of oil paint mural on canvas on plaster substrate. Ceiling height is approximately 15’-9”.

• Veranda, second floor of the Bathhouse - walls only, approximately 1,750 square feet of glazed ceramic tile. Ceiling height is approximately 15’-9”.

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The scope also includes preparation of two reports, one for each location, documenting the cleaning and treatments undertaken and describing observed damage and recommending treatments for the observed damage.

All work will be performed under a single contract and contract period.

IV. REQUIREMENTS

A. GENERAL PROVISIONS

1. The requirements stated in this document are minimum requirements, and as such are not intended to limit the contractor from surpassing the stated requirements.

2. The Contractor shall be responsible for furnishing all services, labor, parts, equipment (except as noted below), personnel, tools, and materials necessary to completely examine and clean the murals and to generate a report on the mural conditions, meeting all requirements specified herein.

3. Conservator Qualifications: Contractor shall provide experienced conservation staff who have performed similar work. Qualifications shall include:

a) Master’s degree, certificate, and postgraduate training in architectural, murals, and/or objects conservation. Teaming specialties is encouraged if a single conservator does not have all the qualifications.

b) Experience in similar painted mural and tile mosaics in historic building contexts - provide descriptions of 5 similar projects that includes a written paragraph summarizing treatments, and at least one image best showing the project’s scope of work.

4. Minimum OSHA 10 certification for at least one job site participant to be present onsite at all times contractor work is being conducted.

5. All hardware and equipment required for the complete examination and cleaning shall be furnished and provided by the Contractor. No government personnel, equipment (except as noted below), or materials will be available for Contractor use.

6. The Contractor shall immediately notify the Contracting Officer of any ambiguities, inconsistencies and errors discovered in this specification or between contracting documents and existing conditions.

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7. Responsibility for Site Damage: The Contractor will be held responsible for any damage or marks to existing construction resulting from activities of the Contractor and Contractor’s employees. Provide appropriate protection to existing finished surfaces.

8. Building Utilities: Contractor may have use of building electrical outlets.

Outlet locations are limited; Contractor is responsible for any required extension cords. Water, restrooms and a utility sink are available in the building for contractor use.

9. The contractor must follow American Institute for Conservation (AIC)

Code of Ethics and Guidelines for Practice, The Secretary of the Interior's Standards for the Treatment of Historic Properties as well as all federal, state and local health and safety guidelines.

B. DOCUMENTS

The following documents are provided for use in completing the work:

1. This Scope of Work Document

2. Conservation and Treatment Report – Main Lobby

3. Sargent Johnson Veranda Tile Mural Conservation Assessment and

Treatment Recommendations

4. Murals Maintenance – Drawings and Photographs

5. Guidance on Site Specific Safety Plans

C. SUBMITTALS

1. Schedule - Prior to start of work, provide projected completion timeline/schedule from date of award showing milestones for onsite work and issuance of report.

2. Safety:

a) Prior to start of work, Contractor to provide a Site Specific Safety Plan. See document “Guidance on Site Specific Safety Plans”.

b) If scaffolding will be utilized, submit evidence of training and certification on the safe use of scaffolding for every worker on site.

c) If any solvents or VOC products are to be used on site, workers are to submit proof of certifications for respirator fit testing and must comply with all SDS recommendations.

3. Products – submit Technical Data Sheets (TDS) and Safety Data Sheets (SDS). Work may not commence until submittals are accepted.

4. Condition and Recommended Treatment Report, Draft– Following examination and cleaning, produce a report explaining the cleaning undertaken, describing observed damage and/or deterioration, including photographs, and recommending treatments and repairs to correct the

BATHHOUSE MURAL MAINTENANCE - 2ND FLOOR Page 4 of 7 damage and/or deterioration. Provide report as an editable Microsoft Word digital document. NPS will review and provide written comment on the report.

5. Condition and Recommended Treatment Report, Final – Contractor will respond NPS comments and make any necessary changes and submit a final report.

D. PRODUCTS AND EXECUTION

1. Products

a) Cleaning Agents – per Conservation and Treatment Reports

b) Materials should be selected to be as low in volatile organic compounds (VOCs) and as environmentally friendly as possible, and must comply with the California VOC product regulations.

The building is likely to be open to the public during treatment and the contractor must recognize that individuals may be highly sensitive to solvent vapors and other smells.

2. Execution – General

a) Protect all areas and surfaces including adjacent walls and floors.

Tape off adjacent surfaces with removable painters tape and visqueen. Do not tape to any artwork, murals, or sensitive surfaces.

Clean all surfaces of tape residues following removal of masking materials. Equipment shall not be dragged, skidded, or slid which would cause visible scratches, dents, or other damage to building surfaces.

b) Do not pour solvents on site. Bring solvents in single small sealed containers as needed. Label all containers according to OSHA requirements.

c) Contractor is responsible for cordoning off the work area, including during mobilization, duration of work and demobilization, and ensure there are no trip hazards, overspray of materials being used, or other hazards for workers, NPS staff or the public.

d) Conduct a conditions assessment of the entire mural that can be documented with images, annotated images or diagrams to be included in the Condition and Recommended Treatment Reports.

3. Execution – Painted Murals

a) Examination - Contractor shall examine the murals for damage and deterioration, including but not limited to:

(1) Flaking paint – with particular attention to the top of walls

(2) Moisture damage

(3) Scratches, abrasion etc.

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(4) Delaminating canvas - with particular attention to the window recesses in the Main Lobby.

b) Cleaning - Cleaning of murals is to be consistent with recommendations in the Conservation and Treatment Report, see included documents. Cleaning is expected to be limited to dusting and removal of loose particulates. Dry cleaning or other more intensive cleaning, if required, should be listed as a recommended treatment in the Condition and Recommended Treatment Report.

c) Cosmetic Touch-up – Cosmetic Touch-up is to be consistent with recommendations in the Conservation and Treatment Reports.

4. Execution – Tile Murals

a) Examination - Contractor shall examine the murals for damage and deterioration, including but not limited to:

(1) Moisture damage

(2) Scratches, abrasion etc.

(3) Investigate double door transoms for cause of vertical cracking in centers.

(4) Conduct soundings overall to determine any further areas of tile separation from wall.

(5) Conduct cleaning tests on foreign residues with heat and/or limited solvent/stripper.

(6) Conduct cleaning tests for reduction of surface staining using poultices and light abrasive sponges.

(7) Conduct cleaning tests and mockups for grout losses, including color compensation.

(8) Present mockups for spall, crack and drilled holes cleaning, consolidation, fills, and cosmetic compensation.

(9) Present mockups for reattachment of loose tiles, including sealing exposed edges where gaps exist.

b) Cleaning - consistent with recommendations in the Tile Mural

Conservation Assessment and Treatment Recommendations Report.

c) Loose tiles –re-adhered consistent with recommendations in the

Tile Mural Conservation Assessment and Treatment Recommendations Report. For initial bidding purposes, the quantity of loose tiles can be estimated at 20 sf.

d) Spalls - consolidation without cosmetic compensation, consistent with recommendations in the Tile Mural Conservation Assessment and Treatment Recommendations Report.

e) Cracks – clean and seal consistent with recommendations in the Tile Mural Conservation Assessment and Treatment Recommendations Report.

f) Missing Grout – infill consistent with recommendations in the Tile Mural Conservation Assessment and Treatment Recommendations Report (without cosmetic compensation).

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g) Although sections of the mural can be accessed by ladder or a rolling “painters” scaffold, the two stairwells (18’x 7’) will likely require a professional scaffolding installation (see attached document “Drawings and Photographs Mural Maintenance 2024” for location). The scaffolding and work will need to be phased to allow public access to at least one stairwell at a time. The building has limited access and can accommodate hand carried scaffold parts to be assembled on site. The veranda cannot easily accommodate an aerial or manlift as it is challenging to get it into the building.

E. CONTRACT LINE ITEMS

Separate pricing shall be provided for the following Contract Line Items:

1. Contract Line Item #1 – Main Lobby Painted Mural

Examine, clean and treat painted murals in the Main Lobby; prepare a Condition and Recommended Treatment Report

2. Contract Line Item #2 – Veranda Tile Mural Examine, clean and treat tile murals on the Veranda; prepare a Condition and Recommended Treatment Report

V. DELIVERY

A. CONTRACTOR IDENTIFICATION

When performing as contractor, the contractor shall identify themselves as contractors for the government both orally and in writing. Under no circumstances shall the contractor state or imply that it is acting on behalf of the government.

B. DELIVERY AND PRODUCTS

Delivery of materials and equipment will be directly to the work site.

VI. GOVERNMENT FURNISHED PROPERTY (GFP)

A. Access - The government will provide for access to the facility for both required site visits and execution of the work.

VII. SECURITY

The contractor and its’ representatives must check-in with National Park Service staff before entering the building.

VIII. TRAVEL

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There are no travel requirements or provisions.

IX. OTHER UNIQUE REQUIRMENTS AND CONSIDERATIONS

A. WORK HOURS

Work shall take place on weekdays (Monday – Friday) between 8:00 AM and 4:00 PM, excluding federal holidays and closures. Contractor shall at all times conduct his operations to ensure that inconvenience to SAFR employees who work within the area is kept to a minimum.

B. WALL/CEIILNG HEIGHT

The murals in all locations extend to the ceiling, at a height of approximately 15 feet.

Adequate equipment and safety measures (complying with OSHA standards for working at elevated heights) will need to be provided by the contractor.

X. PLACE OF PERFORMANCE

The work will be performed at 900 Beach Street, San Francisco, CA, which is part of the San Francisco Maritime National Historical Park (SAFR), National Park Service.

XI. PERIOD OF PERFORMANCE

Work shall begin no later than 30 days after contract award notice to proceed, and work shall be completed within 45 days beginning work.

XII. ACCEPTANCE

A. The Contracting Officer’s Representative, and NPS conservators, will review cleaning procedures while in process.

B. The Contracting Officer’s Representative, and NPS conservators, will review the draft Condition Reports within 14 days of receipt.

C. Final acceptance will be considered complete when the Contracting Officer’s

Representative determines that the established criteria as identified in this Scope of Work have been met.

D. After all deficiencies, if any, have been corrected, a Letter of Acceptance will be issued.

END OF SCOPE OF WORK