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STORMWATER POLLUTION PREVENTION 02 1330-4 A. Reclaimed water shall be used to control dust on a daily basis or as directed by the Engineer B. At the end of each working day, or as directed by the engineer, the roadways and on-site paved areas shall be cleaned and swept of all materials attributed to or involved in the work. Streets shall not be washed down into a storm drain or creek in lieu of street sweeping. Water wash may be picked up by a vacuum unit in lieu of sweeping. 3.05 SAWCUTTING A. The contractor shall cover or barricade catch basins using control measures such as filter fabric, straw bales, sand bags and fine earthen dams to keep slurry out of the storm drain system. The contractor shall ensure that the entire opening is sealed. B. Sawcutting debris and spoils be removed by shovel, absorption, vacuum or pick up of waste prior to moving to the next location or at the end of each working day, whichever is sooner. C. If slurry enters a catch basin, the slurry shall be removed from the storm drain immediately. 3.06 DEWATERING OPERATIONS A. Water shall be routed through a control measure as determined and approved by the Engineer such as a sediment trap, sediment basin or Baker tank to remove settleable solids prior to discharge to the storm drain system. Filtration of the water following the control measure may be required on a case-by-case basis. B. The filtered water shall be reused for other purposes such as dust control or irrigation to the extent possible. C. If the project is within an area of known groundwater contamination, the water from dewatering operations shall be tested prior to discharge. If the water meets the Regional Water Quality Control Board standards, it may be discharged into the storm drain. With South Bay System Authority (SBSA) permit, water may be discharged into the sanitary sewer. Otherwise, the water shall be treated and hauled off-site for proper disposal. 3.07 CONCRETE GROUT AND MORTAR WASTE MANAGEMENT A. Concrete, grout and mortar shall be stored away from the drainage areas and ensure that these materials do not enter the storm drain system. B. Concrete trucks shall not be washed out into streets, gutters, storm drains, drainage channels or creeks. C. Concrete trucks and equipment shall be washed out off-site or in a designated area on-site where the water will flow onto dirt or into a temporary pit or bermed area. The water shall percolate into the soil and the hardened concrete placed in a waste