A04_SOW_256864_Regrout_East_and_Weset_Convenience_Station_Roofs_final.docx

Replace Grout & Seal Tiles on East & West Convenience Station Roofs, SAFR

Statement of Work

Replace Grout & Seal Tiles on East & West Convenience Station Roofs San Francisco Maritime National Historical Park, California

Table of Contents General Information General Requirements Submittals Accident Prevention Quality Control Work Specifications Inspection/Acceptance Contracting Officers Authority Images/Drawing

General Information

1.1 Description: The contractor shall provide all necessary personnel, equipment, tools, materials, training, supervision, and other items necessary to: Preparing the surfaces, remove and replacing grout, and seal the tile roofs of the East and West Convenience Station Roofs at the San Francisco Maritime NHP. Please note that these are historic structures all preservation treatments must meet The Secretary of the Interior’s Standards for the Treatment of Historic Properties.

A. General Information East and West Convenience Station Roofs

i. Both Roofs are approximately 875 sqft for a total of 1750 sqft.

ii. Deck tiles are 18 & 1/8th” x 7 & 3/16” and 7/8” thick, grout width varies between 1/4" to 1/2" inch.

iii. Trim tiles at base of wall 7” x 7 &1/2” and 1/2” thick grout width varies between 1/4 and 5/16.

B. Surfaces preparation includes:

i. Cleaning tiles to remove biological growth, environmental pollution, graffiti, and paint.

ii. Epoxying hairline cracks on approximately 50 tiles.

C. Grout replacement & tile sealing includes:

i. Removing the existing grout from both roof decks and perimeter tiles.

ii. Replace with grout that matches original in color and texture.

iii. Seal grout and tiles with a product that will protect them in a harsh marine environment.

1.2 Maritime Museum Complex Information & Location:

A. The East and West Convenience Stations are Work Progress Administration era buildings dating from 1938, they are National Historic Landmarks. The buildings are owned, operated, and maintained by the San Francisco Maritime National Historical Park (SAFR), which is part then National Park Service, under the Department of the Interior.

B. Under normal operating conditions there is no public access to the roofs of these buildings. The contractor will be given access to buildings roofs after the contract has been awarded.

C. The East Convenience Station is located at 850 Jefferson Street, San Francisco, CA 94109.

D. The West Convenience Station is located at 3260 Van Ness Ave, San Francisco, CA, 94109

1.3 Contractors Use of Premises:

A. Inspections and work performed by the contractor shall be during the business hours of 7:00 am-4:30 pm Monday through Friday excluding Federal holidays. Following the notice to proceed, the contractor shall communicate with the Contracting Officer Representative (COR) to schedule any site visits necessary to proceed with work.

B. Contractor shall always conduct operations to ensure the least inconvenience to the public, staff and occupants. No closures of sidewalks or parking spaces will be permitted without specific approval of COR.

C. Work site shall be kept clean and free of debris and secure at the end of each workday

1.4 Field Verification:

A. Contractor shall field verify all the specifications listed in this Statement of Work.

B. It is highly recommended the contractor verify building dimensions, condition, and location prior to submitting estimates, and work schedules.

1.5 Construction Materials:

A. The Government will furnish water on site.

B. All other materials shall be Contractor-furnished from outside the park.

C. Temporary storage of materials at the worksite is authorized. A material storage area will be identified by the COR. If the contractor chooses to use it they must erect a temporary fence around the area. The area must always be kept neat and orderly. The Government will not be held responsible for any damaged or stolen equipment..

D. The contractor will ensure that any materials brought to the worksite are used in accordance with manufacturer’s instructions.

General Requirements:

2.1 The Contractor performing the tile work must possess a valid California C-54 Ceramic and Mosaic Tile Contractors License.

2.2 Data and information furnished or referred to herein is for the contractor’s information. The Government shall not be responsible for any interpretation of or conclusion drawn from the data or information by the contractor.

2.3 The contractor shall hold and save the Government, it’s officers and agents, free and harmless from liability of any nature occasioned by the contractor’s performance.

2.4 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.

2.5 Work will not begin, nor will timelines be set prior to the preconstruction conference.

2.6 Preconstruction Conference:

A. Before start of construction, Contracting Officer will arrange an on-site meeting with contractor and COR. All required forms for submittals and project execution will be provided at this meeting. The meeting agenda will include the following as a minimum:

i. Correspondence procedures

ii. Designation of responsible personnel

iii. Labor standards provisions

iv. Payroll reports

v. Changes

vi. Payments to Contractor

vii. Subcontractors

viii. National Park Service regulations

ix. Accident prevention program (including name of responsible supervisor)

x. Accident reporting

xi. Documents required under the contract

xii. Park rules and regulations

xiii. Safety program (compliance with the "Accident Prevention" section of this document)

xiv. Tentative construction schedule

xv. Submittal of permits, shop drawings, project data, samples, and approved equals

xvi. Project closeout requirements

2.7 Progress Meetings:

A. The Contracting Officer and COR will work with the Contractor to schedule meetings as necessary on a regular timeline with the Contractor and subcontractors.

B. Subcontractors will not be allowed to work until they have attended a meeting.

C. Additional meetings will be held as needed or for new subcontractors.

D. The meeting agenda will include the following as a minimum:

i. Approval of minutes of previous meetings

ii. Review of work progress

iii. Field observations, problems, and decisions

iv. Identification of problems which impede planned progress

v. Review of submittals schedule and status of submittals

vi. Review of off-site fabrication and delivery schedules

vii. Status of project record drawings (monthly)

viii. Status of operation and maintenance data manuals (monthly)

ix. Maintenance of progress schedule

x. Corrective measures to regain projected schedules

xi. Planned progress during succeeding work period

xii. Coordination of projected progress

xiii. Maintenance of quality and work standards

xiv. Effect of proposed changes on progress schedule and coordination

xv. Other business relating to work Submittals:

3.1 Description:

A. The work of this section consists of submittal requirements before and during construction.

B. From CM-16 will be used for all transmittals.

3.2 Submittal and Approval Procedures:

A. As specified in the individual sections, the following shall be provided to the National Park Service Contracting Officer and COR prior to receiving a Notice to Proceed but no later than four weeks after contract award.

i. Work Plan: A step by step plan outlining a time table for the work outlined in section 6.0 Work Specifications.

ii. Accident Prevention Plan. This plan will address the health and safety of contractor workers, NPS staff and the public concerning the work on site. The Contractor must ensure that the procedures, methods, and materials used in this project are compliant with OSHA standards and best practices for employee and site safety. This plan must include site specific mitigations, and safety signage in order to keep staff and visitors safe during and after project hours. Plan must contain mitigations and safe practices to be used in response to the Covid-19 pandemic.

B. Contracting Officer reserves the right to require submittals in addition to those called in individual sections.

C. Approved Equals:

i. For each item proposed as an “approved equal,” submit supporting data including:

1. Technical Data sheets on all preparation and painting products.

2. Comparison of the characteristics of the proposed item with that specified.

ii. A request for approval constitutes a representation that the contractor:

1. Has investigated the proposed item and determined that it is equal or superior in all respects to the specified product it is replacing.

2. Will provide the same warranties for the proposed item as for the item specified.

3. Has determined that the proposed item is compatible with interfacing items.

4. Will coordinate the installation of an approved item and make all changes required in other elements of the work because of the substitution.

5. Waives all claims for additional expenses that may be incurred as a result of the substitution.

D. Coordinate all submittals and review them for legibility, accuracy, completeness, and compliance with contract requirements. Forward submittals that are related to or affect one another as a package to facilitate coordinated review. Each transmittal shall contain only data specific to that individual submittal.

3.3 Submittal Identification:

A. Identification shall include the park name-package number, project title, contract number, and transmittal number.

B. Identification information on samples shall be applied to the most readily visible area on the sample or on tags attached to sample.

3.4 Submittal Numbering:

A. Number each submittal consecutively.

B. For re-submittals use the original submittal number, plus a letter suffix beginning with A.

C. Additional re-submittals of the same item shall contain the original number with the next consecutive letter.

3.5 Contracting Officer’s Review:

A. Submittals will be returned disapproved without technical review if identification information is missing, not filled in, or if placed on the back of the submittal; an incorrect number or format of submittals is provided; the transmittal form is incorrectly filled out; submittals are not coordinated; or submittals do not show evidence of contractor’s approval. Form will be provided at preconstruction meeting.

B. Any work done or orders for materials or services placed before approval shall be at the contractor’s own risk.

C. After reviewing submittal, the Contracting Officer will return one copy of form DSC-1 (CS) and one copy of applicable (marked up) submittal sheets to the Contractor. Shop drawing review notations will be returned on the reproducible original shop drawing. All other submitted items will be retained. The Contractor is responsible for producing additional copies for his/her own use.

D. The returned submittal will be marked in one of three ways as defined below:

i. APPROVED: Acceptable with no corrections.

ii. APPROVED WITH NOTATIONS: Minor corrections or clarifications required. All comments are clear, and no further review is required. The Contractor shall address all review comments when proceeding with the work.

iii. DISAPPROVED - RESUBMIT: Rejected as not in accordance with the contract or as requiring major corrections or clarifications. The Contracting Officer will identify the reasons for disapproval. The contractor shall revise and resubmit with changes clearly identified.

Accident Prevention

4.1 Description:

A. The work of this section consists of establishing an effective accident prevention plan and providing a safe environment for all personnel and visitors.

4.2 Submittals:

A. Accident Prevention Plan: Before the pre-construction meeting, submit for acceptance an accident prevention plan. The Contracting Officer and COR will review the proposed program for compliance with OSHA and project requirements. If the plan requires any revisions or corrections, the Contractor shall resubmit the plan within 10 days. No progress payments will be made until the program is approved. The program shall include:

i. Name of responsible supervisor to carry out the plan.

ii. Weekly and monthly safety meetings.

iii. First aid procedures.

iv. Outline of each phase of the work, the hazards associated with each major phase, and the methods proposed to ensure property protection and safety of the public, National Park Service personnel, and contractor's employees. Identify the work included under each phase. Specifically identify the methods of protecting workers and visitors from exposure to lead paint hazard.

v. Include possible environmental hazards and mitigations with each phase of work performed.

vi. Applicable training, both initial and continuing.

vii. Planning for possible emergency situations, such as floods, fires, slides, power outages, and wind and rainstorms. Such planning shall take into consideration the nature of the project, site conditions, and degree of exposure. Consult COR if needed.

viii. Plan must include protocols to follow Federal, State and local guidelines and orders as is relates to the Covid-19 pandemic. At a minimum, plan should contain measures on proper sanitation and hygiene, social distancing protocol, and actions taken to protect employees, vulnerable populations and the community at large as it pertains specifically to the contracted scope of work.

B. Certificates: Provide certificates from a mechanic that all mechanical equipment to be used (if applicable) has been inspected and meets OSHA requirements.

C. Submit a report of safety meetings and safety inspections.

D. Upon request, submit proof of employees' qualifications to perform assigned duties in a safe manner.

4.3 Quality Assurance:

A. In case of conflicts between Federal, state, and local safety and health requirements, the most stringent shall apply. Equipment or tools not meeting OSHA requirements will not be allowed on the project sites. Failure to comply with the requirements of this section and related sections may result in suspension of work.

B. Qualifications of Employees:

i. Ensure that employees are physically qualified to perform their assigned duties in a safe manner.

ii. Do not allow employees to work whose ability or alertness is impaired because of drugs, fatigue, illness, intoxication, or other conditions that may expose themselves or others to injury.

iii. Operators of vehicles, mobile equipment shall be able to understand signs, signals, and operating instructions, and be capable of operating and setting up such equipment. Provide operating instructions for all equipment. Newly hired operators shall be individually tested by an experienced operator or supervisor to determine if they are capable of safely operating equipment.

4.4 Accident Reporting:

A. Reportable Accidents: A reportable accident is defined as death, occupational disease, traumatic injury to employees or the public, property damage and fires. Notify Contracting Officer’s Representative immediately in the event of a reportable accident. Within 7 days of a reportable accident, fill out and forward to Contracting Officer an Accident/Property Damage Report (Form CM-22). Form may be obtained from the Contracting Officer and COR.

B. In the event of an emergency DIAL 9-1-1. The contractor shall contact US Park Police Emergency dispatch immediately (1-415-561-5656) and the Contracting Officer and COR as soon as possible. Outside of an emergency, any hazardous or unsafe conditions shall be reported to the COR as soon as possible. All hazardous or unsafe conditions shall be red tagged immediately to ensure a safe environment for all staff and visitors. A follow up report to the Contracting Officer shall be made within 24 hours.

4.5 First Aid Facilities:

A. Provide adequate facilities for the number of employees and the type of construction at the site.

4.6 Emergency Instructions:

A. Post telephone numbers and reporting instructions for ambulance, physician, hospital, fire department, and police in conspicuous locations at the work site.

4.7 Egress:

A. Always provide and maintain adequate egress in accordance with the Life Safety Code (NFPA 101). No corridor, aisle, stairway, door, or exit shall be obstructed or used in a manner that interferes with egress. Main sidewalks must not be blocked off to the public.

4.8 Protective Equipment:

A. Inspect personal protective equipment daily and maintain in a serviceable condition. Clean, sanitize, and repair, as appropriate, personal items before issuing them to another individual.

B. Inspect and maintain other protective equipment and devices before use and on a periodic basis to ensure safe operation.

4.9 Safety Meetings:

A. A monthly Safety Meeting must be scheduled with the project COR. These meetings shall be used to review the effectiveness of the contractor's safety effort, to resolve current health and safety problems, to provide a forum for planning safe construction activities, and for updating the accident prevention program.

4.10 Training:

A. First Aid: Provide adequate training to ensure prompt and efficient first aid.

B. Hazardous Material: Train and instruct each employee exposed to hazardous material in safe and approved methods of handling and storage. Hazardous materials are defined as explosive, flammable, poisonous, corrosive, oxidizing, irritating, or otherwise harmful substances that could cause death or injury. In this case the potential hazard is lead based paint.

Quality Control

5.1 General: The quality of all work shall be the responsibility of the Contractor. Inspect and test all work often enough to ensure that the quality of materials, workmanship, construction, finish, and functional performance follows applicable specifications and drawings.

5.2 Preservation of Historic Structures: Work at this site shall meet The Secretary of the Interior’s Standards for the Treatment of Historic Properties and shall be performed using the gentlest methods possible to remove and replace materials so as to retain the integrity of the Historic fabric of this building.

5.3 Quality Control Staff: The contractor's job supervisory staff may be used for quality control, supplemented as necessary by additional technicians. The contractor's designated Quality Control Supervisor shall be employed full time at the project site whenever contract work is in progress.

5.4 On-Site Control:

A. Preparatory: Perform before beginning each feature of work.

i. Review control submittal requirements with personnel directly responsible for the quality control work.

ii. Ensure that provisions have been made for field control testing.

iii. Examine the work area to ensure that all preliminary work has been completed.

iv. Verify all field dimensions and advise the Contracting Officer of discrepancies.

v. Ensure that necessary equipment and materials are at the project site and that they comply with approved products and submittals.

B. Initial: As soon as work begins, inspect, and test a representative portion of a particular feature of work for quality of workmanship. Review control testing procedures to ensure compliance with contract requirements.

C. Follow-Up: Inspect and test as work progresses to ensure compliance with contract requirements until completion of work.

5.5 Documentation:

A. Maintain Daily Quality Control log of quality control activities and tests on Contractor’s QC daily report and submit weekly to COR. Form will be supplied at pre-construction meeting.

5.6 Enforcement:

A. The contractor shall stop work on any item or feature pending satisfactory correction of any deficiency noted by the quality control staff or the Contracting Officer. Construction shall not proceed on any feature of work containing uncorrected work.

Work Specifications:

GENERAL

6.1 This work includes: Removing and replacing grout, thoroughly cleaning tiles, making epoxy repairs to cracked tile, sealing grout and tiles. The combined square footage for both roofs/observations decks is approximately 1750 square feet. The details of each task are sequenced and outlined in EXECUTION.

6.2 Submittals

A. Manufacturer’s Data: Submit to COR, Technical Data Sheets for all products to be used in surface preparation, grouting, and tile sealing.

B. Grout: results of grout analysis, and a mortar board with samples to match to existing grout.

C. Submit all information using guidelines specified in Section 3.0.

6.3 Quality Assurance

A. Qualifications of Tile Setters and Finishers: Use only qualified journeyman Tile Setters and Finishers for this project. Contractor will possess a valid California C-54 Ceramic and Mosaic Tile Contractors License.

B. Project inspection: Surface preparation, grout removal, grout installation, tile repairs, and sealing shall be inspected (and approved) by the COR prior to the next phase of work commencing.

C. Comply with applicable regulations of OSHA, 28 CFR 1926-1993, and EPA and State of California regulations regarding Volatile Organic Compounds (VOC).

D. Manufactures application instructions for product uses must be followed.

6.4 Project Conditions

A. Use extra care in the protection, preparation, and working around features and materials on historic structures. Protect adjacent historic and non-historic materials.

i. The tiles on these roofs is matchless, replacing them will require custom fabrication.

B. Power washing with a detergent is an option, but no wastewater will be permitted to run in to storm drains or the bay.

C. The location in this contract is subject to extreme fog and wind conditions for much of the year. The Contractor shall schedule the work such that work occurs only when conditions at the individual project sites satisfy the requirements of the products being used.

D. Do not allow fire hazards to occur on the project sites; remove from the area daily all oily rags, waste, and other combustibles.

PRODUCTS

6.5 Tile Products:

A. Grout must match original in color and texture. The new grout does not have to match the color of the worm grout but should approximate grout color as it was originally installed.

B. Tile cleaning products and sealant must not stain or discolor the tile.

C. Epoxy must be color matched to the tile to conceal as best as possible any repairs.

D. Product Coordination: The grout, epoxy, tile cleaner and sealant must all be compatible with each other and the tiles.

6.6 Product Material Quality

A. Provide the best quality grade of the various types of grout, epoxy, tile cleaner and sealer as regularly manufactured by an approved material manufacturer. Material not displaying the manufacturer’s identification as a standard, best-grade product will not be acceptable.

EXECUTION

Note: This is a historic preservation project. The Standards for Preservation must be followed, any damage that is caused by violating the Standards for Preservation will be repaired at no extra cost to the Government. The Standards for Preservation can be found here: Preservation as a Treatment and Standards for Preservation—Technical Preservation Services, National Park Service (nps.gov)

6.7 Grout Sample: Remove enough grout to have it analyzed by a lab to determine type and color need to match original grout mix.

i. AMR Lab is the preferred vendor for this.

1. Mortar Analysis/Mortar Matching Services - Analysis of Mortar - AMR Labs- Mortar Testing Lab (mortarlab.com)

ii. Provide a copy of the mortar analysis to COR

iii. Using the results of the analysis create a grout sample for the COR to review and approve.

6.8 Remove Grout.

i. Remove all existing grout using the gentlest means necessary.

ii. Extreme care must be taken when removing the grout. The tiles date to the 1930’s and no longer in production. Short of a custom reproduction run these tiles cannot be replaced.

6.9 Clean Tiles

A. Before using any cleaning products on the roof test, them on sample tile provided by the COR.

B. Clean all roof and trim tiles, use the gentlest means possible to remove biological growth, environmental staining, grease, paint, graffiti, or anything else that prevents the tiles from being sealed.

C. If the product manufacture recommends sealing the tiles before grouting that can be done at this point.

6.10 Install Grout

A. Install grout following manufactures instructions, and industry best practices.

B. The final product should be free from any visible defects, blemishes, hazing etc.

6.11 Seal Grout and Tiles

A. Before using approved products test them on provided tiles to ensure the products do not stain or drastically alter the tiles color.

B. Following manufacturers instructions apply as many coats as recommended to protect tiles and grout in a harsh marine environment.

i. Ensure adequate drying and curing times are observed before applying the next coat.

C. Tiles must be free of hazing or any other defects caused by the improper application of grouts and sealants.

Project Closeout

7.1 Description:

A. The work of this section consists of final cleanup, closeout submittals, and final inspection procedures.

7.2 Completion Report. This report must include:

A. A drawing or photographs that shows where tiles were repaired on both roofs.

B. Technical Date Sheets for all the cleaners and sealers used on the roofs.

i. Include epoxy products and the names of the colors used to match tiles.

C. Results of the grout analysis, name and type of grout used, and grout care instructions.

D. Contact information for the Contractor and all Subcontractors.

7.3 Cleaning:

A. Before scheduling the final inspection, remove all tools, equipment, surplus materials, and pick up all construction debris from the site. At time of final inspection, project shall be thoroughly clean and ready for use.

7.4 Substantial Completion and Final Inspection

A. When project, or designated portion of project, is substantially complete, request in writing a final inspection. Upon receipt of written request that project is substantially complete, the Contracting Officer’s Representative will proceed with inspection within 10 days of receipt of request or will advise the Contractor of items that prevent the project from being designated as substantially complete.

B. If, following final inspection, the work is determined to be substantially incomplete, Contracting Officer’s Representative will prepare a list of deficiencies to be corrected before final acceptance and issue a Letter of Substantial Completion. Contractor shall complete the work described on the list of deficiencies within 30 calendar days, as weather permits Contracting Officers Authority

8.1 The contracting officer is the only person with the authority to act as agent of the Government under this contract. Only the contracting officer has authority to:

A. Direct or negotiate any changes in the Statement of Work or specifications B. Modify or extend the period of performance C. Change the delivery schedule D. Change any terms and conditions of this contract Images/Drawings

9.1 East Convenience Station

9.2 West Convenience Station

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