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Appendix F: Definitions <br />DEFINITIONS <br />The terms used in these Guidelines have the meaning set forth below <br />"Aggregate" area pertains to production home neighborhoods, common interest developments, <br />or other situations where multiple parcels are undergoing landscape development as one project, <br />but may eventually be individually owned or maintained. <br />"Backflow prevention device" means a safety device used to prevent pollution or contamination <br />of the water supply due to the reverse flow of water from the irrigation system. <br />"Check valve" or "anti -drain valve" means a valve located under a sprinkler head, or other <br />location in the irrigation system, to hold water in the system to prevent drainage from sprinkler <br />heads when the sprinkler is off. <br />"Certified Landscape Irrigation Auditor" means a person certified to perform landscape <br />irrigation audits by an accredited academic institution, a professional trade organization or other <br />program such as the US Environmental Protection Agency's WaterSense irrigation auditor <br />certification program and Irrigation Association's Certified Landscape Irrigation Auditor <br />program. <br />"Certification of Design" means the certification included as Exhibit E of these Guidelines that <br />must be included in the Landscape Documentation Package pursuant to Section 2.1 of these <br />Guidelines. <br />"City" means the City of Santa Ana or its authorized designee <br />"Common interest developments" means community apartment projects, condominium projects, <br />planned developments, and stock cooperatives per Civil Code Section 1351 <br />"Distribution Uniformity" or "DU' is a measure of how uniformly an irrigation head applies <br />water to a specific target area and theoretically ranges from zero to 100 percent. <br />"Drip" irrigation means any non -spray low volume irrigation system utilizing emission devices <br />with a flow rate measured in gallons per hour. Low volume irrigation systems are specifically <br />designed to apply small volumes of water slowly at or near the root zone of plants. <br />"Emitter" means a drip irrigation emission device that delivers water slowly from the system to <br />the soil. <br />"Estimated Applied Water Use" or "EAWU" means the annual total amount of water estimated to <br />keep plants in a healthy state. It is based on factors such as reference evapotranspiration rate, the <br />size of the landscape area, plant water use factors, and the irrigation efficiency within each <br />hydrozone. <br />32 <br />