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6540 - Supply of Crack Sealing, 3.Statement of Work/ Specifications The scope of work shall be finalized upon the selection of the Firm. The respondent’s submission shall have accurately described your understanding of the objectives and scope of the requested products and services and provided an outline of your process to implement the requirements of the Scope of Work and Services. It is anticipated that the scope of work will include, at a minimum, the following: SCOPE OF WORK: The intent of these specifications is to establish a fixed price for joint and crack sealing services utilizing one of two methods of cleaning, sealing joints and random cracks with approved material in accordance with these specifications. Method 1: Clean and Sealing: (Asphalt Pavement) Method 2: Routing and Sealing: (Concrete Pavement) MATERIALS: The material must be suitable for sealing cracks in asphalt and concrete pavements with the ambient temperature ranging from below 40o F and up to 105o F. B. The rubberized crack seal compound shall conform to the following American Society for Testing Materials (ASTM) specifications. Softening Point 210o F (99o C) Ductility 77o F (25 C) (ASTM D113) 30 cm min. Cone Penetration (ASTM D5329) 15-45 min. Resilience (ASTM D5329) 30% min. Bitumen Content (ASTM D4) 60% min. Tensile Adhesion (ASTM D5329) 400% min. *Any rubber used to make sealant shall be free from fabric, wire, core or other contaminating material. The material shall not be tracked by traffic once cooled to the temperature of the pavement. **Example of approved material is Poly Flex 3. Made by Crafco Inc. C. Backer rod joint filler shall be flexible, lightweight, non-staining, polyethylene, and closed cell. It shall be a heat-resistant, chemical-resistant, ultraviolet-stable, non-absorbent, low density, compressible foam. **Example of approved heat resistant backer rod is CERA- ROD. Made by W.R. Meadows. STOCKPILING AND STORAGE: The storage and handling of sealant material shall be kept in a clean condition at all times and shall be operated in such a manner that there will be no contamination with foreign matter. It shall be the responsibility of the Contractor to provide a storage location for the material, at no cost to the City. EQUIPMENT: Hot Pour Sealing Equipment: The rubberized crack seal material shall be capable of being melted and applied by suitable oil jacketed Kettle equipped with pressure pumps, hose and nozzle at a temperature of 400oF (204 oC) or less. Crack Cleaning Equipment: Equipment utilized for cleaning cracks shall be capable of delivering dry compressed air of sufficient CFM (185 cubic feet per minute) and force to remove all loose debris from cracks to depth specified in the methods of operations. The contractor shall provide at least one handheld pressure wand per crew for the sole purpose of cleaning cracks. Condition of Equipment: All equipment for the handling of all materials and placing of the sealant shall be maintained in good repair and operating condition and subject to the approval of the Street Superintendent or his designated representative. The Contractor, at no cost to the City, will replace any equipment found to be defective and potentially affecting the quality of the crack seal. METHOD OF OPERATIONS: Cleaning and seal method is only to be used on asphalt streets. After applying sealant, the material must be leveled with a squeegee in a narrow band not to exceed a two inches (2”) wide band across the cracks with an overlap beyond the crack edges. Cracks greater than three quarters of an inch (1”) in width with a depth of one inch and half (1½”), shall be filled with heat resistant, non-absorptive backer rod of the appropriate width that will not bind the crack movement, and will provide a uniform sealant reservoir of not more than one inch (1”) in depth. Backer rod will be supplied by the contractor. Transverse and Longitudinal joints shall be cleaned to a depth of one inch and half (1½”) and filled flush with the pavement surface with sealant. The contractor shall use an air compressor with air lance to remove debris and moisture from crack. The contractor shall not apply sealant over existing sealant that’s in good condition. The material shall be applied only when the atmospheric temperature is at least forty (40o) degrees F and rising. Also, the material shall not be applied during rainy weather, or when the humidity is 100%. Route, clean and seal method shall be only used on the concrete streets. Random cracks of one sixteenth (1/16”) and over shall be routed and cleaned before sealing. Cracks greater than three quarters of an inch (1”) in width with a depth of one inch and half (1½”) shall be filled with heat resistant, non-absorptive backer rod of the appropriate width that will not bind the crack movement, and will provide a uniform sealant reservoir of not more than 1” in depth. Transverse and Longitudinal joints shall be cleaned to a depth of one inch and half (1½”) and filled flush with the pavement surface with sealant. Squeegee will only be used where over fill occurs. The sealant band width shall not exceed one quarter of an inch (1/4”) outside any edge of the crack. The material shall be applied only when the atmospheric temperature is at least forty (40o) degrees F and rising. Also, the material shall not be applied during rainy weather, or when the humidity is 100%. The contractor shall not remove sealant that is still in good condition. The final decision on whether or not the remove the old sealant is necessary shall lie with the Street Superintendent or his designated representative Clean up: Contractor will be responsible for hauling off any excessive amount of debris that was created by the cleaning of the cracks and joints. Traffic Control: It shall be the responsibility of the Contractor to provide adequate traffic control measures, such as barricades, flagmen, cones, etc., to protect the uncured crack seal surface from all types of traffic and provide traffic safety in the construction area. Advance warning signs and barricades shall be required (These shall be in accordance with the most current version of the TMUCD Manual). The contractor and his employees shall wear Type II fluorescent orange safety vests at all times while outside vehicles within the work area. Vehicles shall be equipment with warning lights attach to them; strobes or LED warning lights, Notification: The contractor shall give forty-eight (48) hours advanced written notice to the effected residents prior to the work taking place. The contractor must submit a copy of the letter for approval prior to distribution. Work Hours: Residential Streets: No material shall be applied before 7:00 a.m., and the material must be cooled and able to support traffic without tracking by 4:00 p.m. Arterial Streets: No material shall be applied before 9:00 a.m., and the material must be cooled and able to support traffic without tracking by 3:30 p.m.