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Efficient Irrigation SD-12 <br />Design Objectives <br />0 <br />Maximize Infiltration <br />0 <br />Provide Retention <br />0 <br />Slow Runoff <br />Minimize Impervious Land <br />Coverage <br />Prohibit Dumping of Improper <br />Materials <br />Contain Pollutants <br />Collect and Convey <br />Description <br />Irrigation water provided to landscaped areas may result in excess irrigation water being <br />conveyed into stormwater drainage systems. <br />Approach <br />Project plan designs for development and redevelopment should include application methods of <br />irrigation water that minimize runoff of excess irrigation water into the stormwater conveyance <br />system. <br />Suitable Applications <br />Appropriate applications include residential, commercial and industrial areas planned for <br />development or redevelopment. (Detached residential single-family homes are typically <br />excluded from this requirement.) <br />Design Considerations <br />Designing New Installations <br />The following methods to reduce excessive irrigation runoff should be considered, and <br />incorporated and implemented where determined applicable and feasible by the Permittee: <br />■ Employ rain -triggered shutoff devices to prevent irrigation after precipitation. <br />■ Design irrigation systems to each landscape area's specific water requirements. <br />■ Include design featuring flow reducers or shutoff valves <br />triggered by a pressure drop to control water loss in the event <br />of broken sprinkler heads or lines. <br />■ Implement landscape plans consistent with County or City <br />water conservation resolutions, which may include provision <br />of water sensors, programmable irrigation times (for short <br />cycles), etc. <br />CALFORn1A5 ORNv ATER <br />January 2003 California Stormwater BMP Handbook 1 of 2 <br />New Development and Redevelopment <br />www.cabmphandbooks.com <br />