R0066 80 Atch 1 Statement of Work R1.pdf

Task Order Attachment 1 - Statement of Work 1 of 8 W91238-10-R-0066 August 18, 2010

Statement of Work

Install Singly Ply Membrane and Insulation on Roof of Bldg 52 &53 Part I – General Roofing

1.1 General: The contractor shall furnish and provide all labor, materials, equipment and professional supervision necessary to install new 4” rigid insulation and 40 mil single ply membrane over existing built up roofing. This work shall be performed at buildings 52 and 53.

1.1.1 Stated Objectives for Roofing System: The contractor shall then furnish and install a laminated, nominal 40 mil, single ply membrane roofing system that is non-ballasted and fabricated of a weft inserted low shrink, anti-wicking polyester fabric that has a thermoplastic coating (PVC).

The single ply membrane shall be prefabricated into various panel sizes with the largest size not exceeding 2,500 SF. Each panel shall have a factory dialectically (heat) welded 3-1/4” minimum mechanical securing tab formed at intervals not exceeding 60” o/c. Mechanical anchors (screws) and distribution plates shall be used in the field areas to fasten the tabs into place meeting a minimum wind-uplift requirement of 90 psi. Full perimeter termination bar strips fasten to buildings outside edge with lag screws shall be installed to secure membrane’s outer edge. Contractor shall replace all existing gutters and downspouts with new and provide new gutters and downspouts over any door opening on the downhill slope side of the roofs where they are lacking now. Gutters run the circumference of the building with downspouts every 20 feet. Gutters and downspouts shall be24 gauge galvanized commercial grade. Other mechanical methods for anchoring the roof material into place will be considered if the satisfy the90 psi wind lift requirements. The thermoplastic coated membrane shall be recognized and categorized by the National Roofing Contractors Association as vinyl chloride polymer based materials combined with other substances (i.e. Bond Coat) and not an acceptable substitute.

Rigid insulation shall be placed under the singly ply membrane.

1.1.2 Stated Objective for Repairs: Approximately 16,980 SF of roof area each. Some removal of underlayment layers, which include asbestos silver painted tarpaper (refer to Safety 1.11), may be required. Wherever possible, the underlayment layers shall be returned to its original thickness for re-use. Those areas that do not have underpayment layers dues to excessive damage may not be required to be rebuilt. However, they may be repaired or filled in if it is necessary to maintain integrity of the new roof elements.

1.1.3 General Requirements:

1.1.3.1 Roofing Assembly Approval: The membrane and related items shall be approved by Factory Mutual research as a 1-90 roofing assembly.

1.1.3.2 Additional Weight Requirements: The total weight of the installed roofing system including all insulation, plates, screws and membrane shall not exceed 50 pounds per square. Each square is

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10’ x 10’.

1.1.3.3 NESHP Notification: The contractor shall provide National Emission Standards for Hazardous Pollutants notification a minimum 10 days prior to commencement of work.

1.1.3.4 Certifications and Medical Qualifications: The contractor shall supply copies of all employees’ Asbestos Worker/Competent Person certifications with respirator qualifications and medical qualifications.

1.2 Applicable Documents:

1.2.1 SIAD Regulation 420-7 (Fire Prevention and Protection)

1.2.2 SIAD Regulation 385-1 (Safety)

1.2.3 All local, state and federal laws

1.2.4 Safety Requirements for Fall Protection (29 CFR 1926.500)

1.2.5 Asbestos Abatement (Cal-OSHA 8 CCR 1529)

1.2.6 POCA Division 00 and 01 Specifications

1.3 Materials Approval: All materials shall be approved by the ACO prior to installation.

1.4 Submittals: in addition to basic IDIQ spec required submittals

1.4.1 Manufacturers Literature/Cut Sheets on the following:

1.4.1.1 Roofing Membrane with heat welded seams

1.4.1.2 Pre-manufactured parapet wall flashing and pipe flashing

1.4.1.3 PVC Weld able drip edges, gravel stops and termination bars

1.4.1.4 Membrane liner layouts

1.4.1.5 Manufacturer’s details for sealing around roof penetrations

1.4.1.6 Fasteners pull out test results performed by fastener manufacturer for this project

1.5 Unscheduled Interruptions: Work operations are subject to unscheduled interruptions and contractor personnel may be required to immediately leave the designated work area or be denied access due to security operations. Mission requirements may necessitate suspension or cancellation of custodial operations for that period. All incomplete work shall be rescheduled for completion at a later time/date mutually agreed upon by the ACO.

1.6 Working Area Verification: The floor areas and other quantitative data stated in this task order have been computed from drawings or site measurements. The contractor shall be responsible for the coordination and proper relationship of this work to the building premises, and thoroughly familiarize themselves with all the details of the work and working conditions, to verify all dimensions in the field, and advise the ACO of any discrepancies before performing any

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1.7 Quality Assurance: While performing this work the contractor shall be subject to onsite inspections by a COR. If the work is found to be in violation of specification requirements, the ACO will issue a stop work order until the violation is resolved. Standby time and expenses required resolving the violation shall be at contractor expense.

1.8 Debris:

1.8.1 Non-Hazardous Waste: All scrap, solid waste, non-hazardous materials shall be disposed off the depot and in accordance with applicable laws and regulations at the contractor’s expense.

1.8.2 Hazardous Waste: Hazardous waste generated by contractors on Sierra Army Depot shall be disposed of in accordance with depot policy, contact the Environmental Office, 530-827-4318, for proper disposal instructions. Government receptacles will be provided for hazardous waste only. The government will dispose of the hazardous waste. The government shall be notified a minimum of 10 days prior to using the receptacle, so that it can be staged.

1.9 Materials and Equipment Stored on Depot: The government shall not assume any responsibility for the security or protection of any materials or equipment stored on the depot by the contractor.

1.10 Environmental Notification: The silver painted tarpaper on the roof contains asbestos.

1.11 Dimensions: The roofs are approximately 16,980 square feet each.

1.12 Roofing Contractor Qualifications: The roofing contractor must be approved and trained by the membrane manufacturer prior to the start of the installation process.

1.13 Warranties:

1.13.1 Craftsmanship and Application Warranty: The installation contractor shall warrant the roof application with respect to craftsmanship and proper application for a period of two (2) years from the date of acceptance by the COE. Should any leaks occur under this warranty during the two-year period, corrective action will be taken by the contractor to repair the roof within five days of notification and according to the membrane manufacturer’s specifications at no cost to the government.

1.13.2 Written Warranties: The membrane manufacturer shall provide a written minimum 15-year limited warranty at no additional cost or charge. Warranties shall cover ponding or standing water without voiding the warranty or shortening the time coverage.

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1.14 Manufacturer of Membrane: All roofing system components shall conform to the current published specifications and details provided by the membrane manufacturer. There shall be no deviation from these specifications without prior written approval by the membrane manufacturer and the ACO.

1.15 Product Delivery and Storage:

1.15.1 All materials shall be delivered in unopened packaging.

1.15.2 All containers shall be labeled with manufacturer’s name, brand name and identification of item.

1.15.3 All materials shall be stored in a dry area and protected from inclement weather; damaged materials shall be replaced at contractor expense.

2.0 Additional Training for Depot Employees: The single-ply membrane liner manufacturer shall agree to provide a training course for Sierra Army Depot’s maintenance crew. Training shall cover minor repairs to the liner and proper handling of its components. All training shall take place after membrane installation and at a time, location and cost agreed upon by manufacturer and the ACO.

Note: Should the single ply membrane match existing single ply membranes already installed on the depot, and depot crews have already received training under a previous contract, then additional training is no required.

2.1 Applicable Documents:

2.1.1 SIAD Regulation 420-7 (Fire Prevention and Protection)

2.1.2 SIAD Regulation 385-1 (Safety)

2.1.3 All local, state and federal laws

2.1.4 POCA Division 00 and 01 Specifications

2.2 Material Approval: All materials shall be approved by the ACO prior to installation.

2.3 Submittals: as required by basic IDIQ specifications

2.4 Unscheduled Interruptions: Work operations are subject to unscheduled interruptions and contractor personnel may be required to immediately leave the designated work area or be denied access due to security operations. Mission requirements may necessitate suspension or cancellation of custodial operations for that period. All incomplete work shall be rescheduled for completion at a later time/date mutually agreed upon by the ACO.

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2.5 Working Area Verification: The floor areas and other quantitative data stated in this task order have been computed from drawings or site measurements. The contractor shall be responsible for the coordination and proper relationship of this work to the building premises, and thoroughly familiarize themselves with all the details of the work and working conditions, to verify all dimensions in the field, and advise the ACO of any discrepancies before performing any work.

2.6 Quality Assurance: While performing this work the contractor shall be subject to onsite inspections by a COR. If the work is found to be in violation of specification requirements, the ACO will issue a stop work order until the violation is resolved. Standby time and expenses required resolving the violation shall be at contractor expense.

2.7 Debris:

2.7.1 Non-Hazardous Waste: All scrap, solid waste, non-hazardous materials shall be disposed off the depot and in accordance with applicable laws and regulations at the contractor’s expense.

2.7.2 Hazardous Waste: Hazardous waste generated by contractors on Sierra Army Depot shall be disposed of in accordance with depot policy, contact the Environmental Office, 530-827-4318, for proper disposal instructions. Government receptacles will be provided for hazardous waste only. The government will dispose of the hazardous waste. The government shall be notified a minimum of 10 days prior to using the receptacle, so that it can be staged.

2.8 Damages: The contractor shall be responsible for repairing any damage caused by construction and or repair activities. Any damages incurred as a result of contractor actions shall be repaired or replaced at no additional cost to the government.

2.9 Materials and Equipment Stored on Depot: The government shall not assume any responsibility for the security or protection of any materials or equipment stored on the depot by the contractor.

3.0 Part II – PRODUCTS:

3.1 Contractor Supplied Materials: The contractor shall supply normal industry standard approved materials.

3.1.1 Minimum Requirements:

3.1.1.1 Minimum Physical Specifications for Membrane:

3.1.1.1.1 Type: Laminated single-ply membrane, that is non ballasted and fabricated of a weft inserted low shrink, anti-wicking polyester fabric that has a thermoplastic coating

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(PVC). The thermoplastic-coated membrane shall be recognized and categorized by the National Roofing Contractors Association as a vinyl chloride polymer-based blend (PVC) single ply membrane. Substitutes that contain a mixture of vinyl chloride polymer-based materials combined with other substances (i.e. Bond Coat) are not acceptable substitutes.

The single-ply membrane shall be prefabricated into various panel sizes with the largest size not to exceed 2,500 square feet. Each panel shall have a factory dialectically (heat) welded 3-1/4” minimum mechanical securing tab formed at intervals not to exceed 60” O/C.

3.1.1.1.2 Minimum Thickness: Nominal 40 mil.

3.1.1.1.3 Tear Strength: 130 x 110 lb when tested by ASTM D-751 (Tongue Method 8” x 8” samples).

3.1.1.1.4 Breaking Strength: 200 x 200 lb when tested by ASTM D-751 methods.

3.1.1.1.5 EMMAQUA Exposure: Minimum EMMAQUA exposure (Desert Sun) greater than

6.1 million Langley with testing done by ASTM E938 methods.

3.1.1.1.6 Elongation: Elongation not to exceed 27% with testing done by ASTM D-751.

3.1.1.1.7 Dimensional Stability: Dimensional Stability is to be less that 5% change tested with ASTM D-1 204 methods.

3.1.1.1.8 Low Temperature Flexibility: Low temperature flexibility shall show no cracks at minus forty (-40) degrees F when tested by ASTM D2136 (1-1/8” mandrel).

3.1.1.1.9 Puncturing: Puncturing (dynamic impact) shall not be less than 250 lb as tested by Fed Std 101 B methods.

3.1.1.1.10 Accelerated Weathering: Accelerated weathering, using Carbon Arc 6000 Hr and ASTM G-53 88 2000 Hr shall show no cracking or blistering.

3.1.1.2 Mechanical Anchors and Distribution Plates: Mechanical galvanized corrosion resistant anchors and distribution plates shall be used to fasten the tabs into place meeting a minimum wind-uplift requirement of 90 psi. Other mechanical methods for anchoring the roof material into place will be considered based on satisfaction of the 90 psi wind lift requirements.

3.1.1.3 Insulation: Type ES rigid foam insulation, which must comply with federal specification factory mutual class “1” roofing insulation. Underwriters Laboratories classified as a class “A” roofing insulation with thermal properties for 4” equal an R-value of 30.3. Thermal properties for a 4” tapered shall be equal to an R-value of 26.3.

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3.1.1.4 Lumber: Pressure treated, 2” x 6”, kiln dried, LP 22, treated to .40.

3.2 Government Supplied Materials: The government shall supply the non-asbestos shingles required to return the exterior of the warehouse buildings to the original state.

4.0 Part III – Execution:

4.1 Roofing:

4.1.1 Repair and Removal: Wherever possible, the underlayment shall be left in the original condition for reuse. Some removal of the underlayment layers may be required.

Wherever possible the underlayment layers shall be returned to the original thickness for reuse.

Those areas that do not have underlayment layers due to excessive damage may not be required to be rebuilt up. However, they may be repaired or filled in if necessary to maintain the integrity of the new roof elements.

4.1.2 Installation: The roofing assembly including the insulation shall be installed in accordance with the manufacturer’s installation instructions. All field welds and procedures shall conform to manufacturer’s recommendations and all surfaces shall be clean and moisture free.

Note: Any section or portion of the roof that is being worked on shall be completed in a single day to avoid exposure or damage due to rain, dew and/or snow to any roofing component or interior of the facility. Any components that must be left exposed shall be covered and water cut-offs formed around exposed edges and incomplete flashing areas as minimums.

4.1.2.1 Fasteners: Galvanized corrosion resistant screws and plates of appropriate size and lengths as recommended by the PVC single-ply membrane manufacturer shall be used to anchor the liner into place. Spacing of all anchors shall conform to the patterns provided by the manufacturer to perimeters and parapet walls. Fasteners for insulation and membrane shall penetrate a minimum ¾ inch wood deck by a minimum of 1/8 inch. Fasteners and plates shall meet Factory Mutual Standard 4470 for corrosion resistance and wind uplift resistance. Pull out tests shall be performed. They shall meet the fastener manufacturer standards.

4.1.2.2 Cut-Outs: All protrusions through the membrane shall be made to allow for complete sealing afterwards. The membrane shall be slit only wide enough to allow for the membrane to fit over the stack, flue or protrusions. Fasten around cut-outs with only approved membrane manufacturer’s fasteners. Place skirt or stainless steel band around the protrusion and tighten to prevent water penetration, cut off excess banding or material using a factory-approved sealant, and seal the top of the band or collar. Penetrations are between 2 and 4 inches diameter.

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4.1.2.3 Parapet Walls: Fasten bottom tab of prefabricated parapet wall flashing 12” O/C with approved fasteners. Base skirt shall extend a minimum of 6” onto the roof area and a minimum of 8” up parapet walls. Install termination bar on parapet wall anchoring with approved fasteners and seal completely with factory approved sealant only.

4.1.2.4 Gutters: For gutters, the edge of the membrane shall extend to within ¼” of the gutter and terminate with the termination bars fastened 6” O/C. Apply sealant as specified by the manufacturer.