20.04.06_SurrenderFieldRoof_SOW_Rev1_Base.pdf

Statement of Work Replace Surrender Field Interpretive Center Flat Roof

COLONIAL NATIONAL HISTORICAL PARK

REPLACEMENT OF FLAT ROOFING SYSTEM

AT SURRENDER FIELD INTEPRETIVE CENTER (PMIS 245100)

YORK COUNTY, VA

STATEMENT OF WORK

PART 1 – General

1. DESCRIPTION OF WORK

This contract provides for the removal and replacement of approximately 700 SF of extant flat roofing system on the Surrender Field Interpretive Center at Colonial National Historical Park. Work will include removing the existing roofing system and installing new flat roofing system. Work also includes replacing additional features such as 125 LF of flashing/Gravel Stop and ensuring the of all roof penetrations for drainage are protected, intact, and seamlessly integrated with the roofing system.

The Surrender Field Interpretive Center was constructed in the late 1970’s to provide an overview of the British surrender to the American and French forces following the siege of Yorktown. It is a concrete structure with a unique shape and features.

a. The contractor shall provide all supervision, labor, materials, and equipment to accomplish the following:

i. Removal and disposal of existing flat roofing system; ballast, built up roofing material, any mastic/adhesives, flashing and flashing fasteners. The contractor is to be responsible for all dumpster and disposal fees. There is the potential that the mastic/adhesive contains asbestos, and the gravel/stop flashing is lead coated copper. Contractor is responsible for testing and appropriate disposal in an approved facility of all materials.

ii. Cleaning and preparing the concrete roof structure for the application of new flat roof system.

iii. Repair/Fill any cracks or voids in the underlying concrete with an appropriate material.

iv. Installation of new fully adhered ethylene propylene diene terpolymer (EPDM) 60 mil flat roofing system coated or colored to match the existing concrete color.

v. Installation of an appropriate metal flashing, replicating the effect of the existing gravel stop, with manufacturer approval.

vi. During this project the contractor shall provide methods for protecting any exposed/uncovered building structure and contents from the weather and other potentially damaging elements.

Attachments

a. Photo Log of existing conditions

2. LOCATION AND ACCESS

a. Job Site: Work will be performed at the Surrender Field Interpretive Structure, located at the intersection of the Historic Tour Road and Surrender Road in York County, VA. The Contractor shall travel to and from the work site using the nearest state road access.

b. Staging: Staging and parking for vehicles, equipment and materials shall be confined to a designated area in the Surrender Field lot.

i. Contractor shall coordinate with the National Park Service to determine parking locations, dumpster locations, and contractor access to the site.

ii. Electricity and water will be available at the site, however restroom facilities will not.

3. QUALITY ASSURANCE

a. Governing Standards: All materials, methods of installation and workmanship associated with this contract work shall conform to the manufacturer’s and EPDM Roofing Association recommendations, the NRCA Roofing and Waterproofing Manual and meet the standards of the current editions of the following codes, standards and regulations:

i. American Society for Testing and Materials (ASTM): Applicable standards mentioned in the specifications or instructions.

ii. Underwriters Laboratories (UL): Roofing Materials and Systems Directory, Fire Resistance Directory

iii. National Historic Preservation Act of 1966

iv. Secretary of the Interior’s Standards for Historic Preservation

b. Contractor’s Qualifications: Contractor and/or his designated subcontractor(s) must be regularly engaged in and skilled in applying flat roofing systems, with a minimum of five (5) years of documented experience in this trade. Roofing installer must also be approved by the materials manufacturer.

4. CONTRACTOR-FURNISHED ITEMS

a. All necessary supervision, personnel, equipment, tools, transportation, supplies, materials and incidentals required to perform the work of the contract in a safe, professional manner.

5. SUBMITTALS

All submittals are to be approved by the National Park Service prior to installation or work.

a. Product Data: Contractor shall provide manufacturer’s product information sheets, including installation instructions for EPDM roof system, and all items outlined in Part 2 Section 1. All applicable installation instructions shall become a part of these specifications. Standard cutsheets on materials shall be provided.

b. Safety Data Sheets: Provide manufacturer’s Safety Data Sheets (SDS) for all of the products used in the new roofing system. These SDS sheets must contain health and safety information on the product and will serve as guidelines for safe handling and storage of the products during the contract work.

c. Safety and Health Plan: Provide a safety and health plan outlining all hazards associated with the job and the means and methods to prevent employee or visitor injuries. In addition, the contractor will be responsible for developing and providing a site specific COVID 19, detailing contractors safeguards and efforts to reduce employee and visitor exposure.

d. Warranties and Guarantees: If a product has a warranty or guarantee, then the Contractor shall supply copies of such. The roofing systems shall be warranted by the manufacturer for a minimum of 20 years and copies of the warranties shall be provided to the National Park Service.

e. Contractor’s Warranty of Work: After acceptance of the work by the government, the Contractor shall provide a letter warranting all of the work performed as part of this contract, for a period of one year. This letter of warranty will provide for the materials and labor to repair or correct any defects or problems that might occur within the one year warranty period.

f. Schedule of Work & Written Narrative: Prior to commencement of the work, the Contractor shall provide the National Park Service a schedule of the proposed work and a statement as to how the work will be accomplished including how the building envelope will be protected from inclement weather and potential leaks. Upon review and approval by the National Park Service, the Contractor may commence the work of this contract.

6. TEMPORARY CONTROLS

a. Housekeeping: Keep project area neat, orderly and in a safe condition at all times. Provide for daily pickup of refuse and construction debris and deposit in appropriate refuse container(s).

Dispose of refuse and debris in a legal manner at private or public dumping areas outside the park. Do not burn or bury refuse in the park. Provide appropriate and adequate refuse containers for collecting construction debris and refuse.

b. Air and Water Pollution: Take all necessary reasonable measures to reduce air and water pollution by any material or equipment used during this project. Do not dispose of volatile wastes or oils in storm or sanitary drains.

c. Preservation of Existing Features: Confine all operations within the work limits of the project.

Exercise special care to maintain natural surroundings undamaged. Protect all existing structures, vegetation, equipment or utilities from damage. All vegetation, structures, equipment or utilities damaged by the Contractor shall be restored, repaired or replaced by the Contractor to the satisfaction of the National Park Service at no additional cost to the government.

d. Protection of Public: The work site is located in a National Park Service area that receives visits from the general public. The Contractor shall provide suitable signs and barriers, barrier tape or barricades necessary to warn people of and protect people from the construction operations necessary to complete the work of this contract. Weekend work will not normally be allowed.

e. Worker Safety: The Contractor shall take all necessary precautions for the safety of, and shall provide the necessary protection to prevent damage, injury or loss to any or all employees on the project. Safety requirements are governed by OSHA regulations.

f. Contractor Conduct: While at the worksite or travelling to and from it in the boundaries of Colonial National Historical Park, the Contractor shall comply with any rules and regulations of the National Park Service governing the parkway in general and the work site specifically.

g. Fire Prevention and Protection: Contractor shall take all necessary precautions to prevent fire during this contract work. Internal combustion equipment shall be located by the contractor so that exhausts discharge well away from combustible materials. The contractor shall provide a minimum of one fire extinguisher at the job site appropriate for each type of fire that could occur on the job.

PART 2 – MATERIALS

1. MATERIAL SPECIFICATIONS

a. Flat Roofing System: EPDM roofing material to be proposed by the contractor and approved by the NPS prior to purchase or installation. Roof shall be or integrally colored or coated to give the appearance of the concrete structure.

b. Underlayment: Underlayment material, if required by manufacturer for this application, to be proposed by the contractor in accordance with EPDM manufactures’ standards and approved by the NPS prior to purchase or installation.

c. Caulks and Adhesives: Use those caulks and adhesives recommended by the roofing system manufacturer or the NRCA Roofing & Waterproofing Manual.

d. Concrete Filler: Fill material to be utilized to fill any cracking in concrete roof structure.

e. Flashing: flashing that is compatible with existing materials and approved by the EPDM roofing manufacturer and is an analog to the existing flashing/gravel stop.

PART 3 – WORK REQUIREMENTS

1. PREPARATION

a. Surrender Field Interpretive Structure and surrounding grounds are open to the public from dawn to dusk throughout the year. Contractor shall provide for safe access to and from the inside of the building for employees and visitors using various barriers, barricades, barrier tape and signs.

Contractor shall confine installation operations to the immediate work site.

b. Contractor shall prepare a schedule of work and written narrative on how work will be accomplished and shall receive approval from the National Park Service prior to commencement of the work. The Contractor shall also provide for a method to ensure that the building envelope is watertight at the end of each day’s work.

2. EXECUTION

a. Demolition: Only that amount of demolition work that can be accomplished in a workday’s time allowing the building to be made watertight, shall be attempted each day. Contractor shall assure that the building envelope is watertight at the end of each day and during inclement weather that might cause damage to interior spaces. The method of demolition shall be at the Contractor’s option, but shall be in such a manner that complete removal is accomplished safely. All demolition debris shall be disposed of outside the park in accordance to local and state regulations.

i. Removal of existing flat roofing system: Remove and dispose of all old ballast, membrane/built up material, adhesives/mastic, roof penetration boots, and flashing gravel stops. All materials shall be removed, down to the concrete roof structure. Concrete shall be cleaned in a manner that prepares it for receiving the EPDM roofing system.

b. Repair: Repair or fill concrete cracking or spalling prior to installing the EPDM roofing system.

c. Flat Roof System: Contractor will insure the fully adhered EPDM flat roof system is installed in accordance with all applicable manufacturer, industry and Virginia state standards

d. Safety: The work of this contract is governed by OSHA safety standards. The contractor is expected to provide the materials and equipment necessary to protect workers and park visitors.

Provide proper scaffolding or mechanical lifts for roof work. Proper roofer safety harnesses and lines shall be used during the contract work in accordance to OSHA regulations. Materials used in the contract work shall be handled in accordance to the MSDS recommendations for each material.

e. Cleanup

i. Routine Cleanup: Keep project site neat, orderly and in safe condition at all times.

Provide enough refuse containers for collecting construction debris. Pick up construction debris daily to prevent blowing and scattering. Keep volatile wastes in covered containers. Unless otherwise specified, all removed material becomes the property of the contractor and shall be disposed of outside of the park in accordance to local, state and county regulations.

ii. Final Cleanup: Remove all tools, equipment, surplus materials and rubbish from the site upon completion of the work. Restore or refinish surfaces of existing facilities that are marred, scratched or damaged due to work of this contract, to match the original condition. Remove any grease, dirt, asphalt, stains or foreign material from the finished surfaces. Use cleaning materials recommended by the manufacturer of the surface to be cleaned. Sweep paved or concrete areas and rake grounds to remove all construction debris. At time of the final inspection, project site shall be thoroughly clean and ready for use. All nails shall be found, collected and removed during the final cleanup of the site and through the entirety of the project at the end of each work day.

f. Closeout

i. Closeout Submittals: After the Government accepts the work of this contract, the Contractor shall submit a letter of warranty which will provide for the materials and labor to repair or correct any defects or problems that might occur within the one year warranty period following acceptance. Contractor shall also supply the roofing manufacturer’s warranties on the EPDM membrane roofing system.

ii. Substantial Completion and Final Inspection: Submit written certification that project, or designated portion of the project, is substantially complete, and request in writing a final inspection. The National Park Service or designated representative will make an inspection within 10 days of receipt of request. When the National Park Service determines that the work is substantially complete, it will prepare a list of any deficiencies to be corrected before final acceptance and issue a Letter of Substantial Completion. If the National Park Service determines that the work is not substantially complete, it will immediately notify the Contractor in writing, stating reasons. After completing work, Contractor shall resubmit certification and request a new final inspection.

END OF STATEMENT

ATTACHEMENTS

ATTACHMENT 1

Existing Conditions