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SC-44 Drainage System Maintenance <br />■ Clean catch basins, storm drain inlets, and other conveyance structures before the wet <br />season to remove sediments and debris accumulated during the summer. <br />■ Conduct inspections more frequently during the wet season for problem areas where <br />sediment or trash accumulates more often. Clean and repair as needed. <br />■ Keep accurate logs of the number of catch basins cleaned. <br />■ Store wastes collected from cleaning activities of the drainage system in appropriate <br />containers or temporary storage sites in a manner that prevents discharge to the storm <br />drain. <br />■ Dewater the wastes if necessary with outflow into the sanitary sewer if permitted. Water <br />should be treated with an appropriate filtering device prior to discharge to the sanitary <br />sewer. If discharge to the sanitary sewer is not allowed, water should be pumped or <br />vacuumed to a tank and properly disposed. Do not dewater near a storm drain or stream. <br />Storm Drain Conveyance System <br />■ Locate reaches of storm drain with deposit problems and develop a flushing schedule that <br />keeps the pipe clear of excessive buildup. <br />■ Collect and pump flushed effluent to the sanitary sewer for treatment whenever possible. <br />Pump Stations <br />■ Clean all storm drain pump stations prior to the wet season to remove silt and trash. <br />■ Do not allow discharge to reach the storm drain system when cleaning a storm drain pump <br />station or other facility. <br />■ Conduct routine maintenance at each pump station. <br />■ Inspect, clean, and repair as necessary all outlet structures prior to the wet season. <br />Open Channel <br />■ Modify storm channel characteristics to improve channel hydraulics, increase pollutant <br />removals, and enhance channel/creek aesthetic and habitat value. <br />Conduct channel modification/improvement in accordance with existing laws. Any person, <br />government agency, or public utility proposing an activity that will change the natural <br />(emphasis added) state of any river, stream, or lake in California, must enter into a Steam or <br />Lake Alteration Agreement with the Department of Fish and Game. The developer -applicant <br />should also contact local governments (city, county, special districts), other state agencies <br />(SWRCB, RWQCB, Department of Forestry, Department of Water Resources), and Federal <br />Corps of Engineers and USFWS. <br />Illicit Connections and Discharges <br />■ Look for evidence of illegal discharges or illicit connections during routine maintenance of <br />conveyance system and drainage structures: <br />- Is there evidence of spills such as paints, discoloring, etc? <br />2 of 6 California Stormwater BMP Handbook January 2003 <br />Industrial and Commercial <br />www.cabmphandbooks.com <br />