23A - PROJ - WATER MAIN IMPROVEMENTS

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CITY OF SANTA ANA SPECIFICATIONS PROJECT NO. 11 -6416 SEVENTEENTH STREET WATER MAIN IMPROVEMENTS Specifications for glass beads shall be "8010 -004 (Type II)." Glass beads shall be premixed within the thermoplastic material prior to application and also applied to the thermoplastic striping material immediately following the application of the striping. Thin -mil thermoplastic material shall conform to the requirements of Caltrans Specification No. PTH- 02SPRAY, for Thermoplastic Traffic Striping Material, Sprayable, White and Yellow. The binder material shall be Alkyd. Copies of the Caltrans Specification No. PTH- 02SPRAY are available at the Caltrans Transportation Laboratory, Sacramento, California. Thermoplastic material shall conform to the requirements of Caltrans Specification No. PTH- 02ALKYD. Thin -mil thermoplastic material for traffic stripes shall be applied by spray method in single uniform layer at the minimum thickness of 30 mils and not to exceed 45 mils. Thermoplastic shall not exceed 40 -50 mils. The Contractor shall not begin work until a written notice to proceed has been issued by the Engineer. The Contractor shall notify the City of Santa Ana - Public Works Agency (CSA- PWA) Engineer a minimum of two working days prior to beginning the work to coordinate the work. A schedule of the streets to be re- striped for each day shall be provided to the Engineer one full workday prior to striping or re- striping any streets. The Contractor shall adjust the thermoplastic application rate as necessary to achieve the thermoplastic application rate stated above prior to striping. Thermoplastic application rate tests (up to and including 5 thermoplastic application rate tests per day, including the thermoplastic application rate test at the start of each workday) may be conducted at random times and locations throughout each workday at the discretion of the Engineer. Thermoplastic Application Rate Testing The paint application rate shall be determined by passing the striper over a metal plate while the paint application system is operating. The flow of glass beads shall be stopped while passing over the metal plate. The Engineer or representative shall measure thickness of the applied thermoplastic immediately after application of thermoplastic on the metal plate. Striping shall not continue if the proper thickness of thermoplastic is not being applied. Adjustments and corrective measures shall be applied to insure that the correct thickness of thermoplastic will be applied. Testing of the thermoplastic application rate, as described above, will be required following any adjustment to the thermoplastic application rate, thermoplastic applicator nozzles, or any other thermoplastic application equipment prior to commencement or re- commencement of striping. The initial testing and re- testing of thermoplastic application rates at any location shall be considered as a single thermoplastic application rate test. T -2c 23A -90