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OR BK 1 0808 PG 3338 Page 4 of 8 <br />(1) All new residential, commercial, and institutional construction where a new <br />landscape irrigation system is required. <br />(2) Where significant rehabilitation (50% or greater) of an existing landscape <br />irrigation system will be conducted. <br />(B) General. <br />(1) Nothing within this Section shall require the installation of an irrigation system. <br />Requirements for installing irrigation systems are specified in other Articles <br />within Chapter 23 of the Zoning, Land Use and Development Regulation and <br />Chapter 21 of the Utilities Code. <br />(2) All irrigation systems shall be designed by an irrigation professional consistent <br />with the irrigation systems standards and as set forth in this Section. <br />(3) All irrigation systems must be properly installed and maintained and must <br />operate technology such as rain and/or soil moisture sensors that inhibit or <br />interrupt operation of the irrigation systems during periods of sufficient <br />moisture. <br />(4) Compliance with this Section shall not exempt an individual from any other <br />local, state or federal requirements. <br />(C) System Design and Installation Standards. Irrigation system design and installation <br />shall be consistent with the irrigation system standards and the following <br />requirements: <br />(1) The maximum total irrigated area on residential lots, regardless of lot size, shall <br />not exceed 0.5 acres. This provision does not apply to temporary irrigation such <br />as portable hoses and sprinklers. <br />(2) High-volume irrigation area shall not exceed 60 percent of the landscaped area. <br />This standard is applicable on residential lots over 1/8 acre and commercial <br />lots over 1/8 acre. This standard applies to common areas and open space in <br />developments. This standard excludes vegetable gardens and fruit or nut trees <br />on individual lots or community gardens. <br />(3) Narrow areas, four feet wide or less, shall not be irrigated unless correctly <br />installed low-volume irrigation or correctly installed side -strip irrigation are <br />used. <br />(4) High-volume irrigation shall not be used for trees, shrubs, or groundcover beds. <br />Permanent micro -irrigation may be used in these areas. The City encourages <br />the use of temporary establishment irrigation. <br />(5) Irrigation zones shall be divided according to vegetated groupings (e.g., <br />turfgrass, shrubs, native plants, trees) and the water requirements of the plants. <br />Turf grass and landscaped beds, such as trees, shrubs, and groundcover beds, <br />shall not be irrigated in the same zone as each other. <br />(6) Sprinkler head types, such as spray heads and rotors, shall not be mixed in the <br />same zone. <br />(7) Distribution equipment in each zone shall have matched precipitation rates. <br />(8) Rotors and spray sprinkler heads in turfgrass areas shall be spaced to provide <br />head-to-head coverage. <br />(9) A minimum separation of four inches shall be required between distribution <br />equipment and pavement. <br />(10) A minimum separation of 24 inches shall be required between distribution <br />equipment and buildings and other vertical structures, except fences. <br />(11) Technology that inhibits or interrupts operation of the irrigation system during <br />periods of sufficient moisture shall be required on all irrigation systems to <br />avoid irrigation during periods of sufficient rainfall. Examples of such devices <br />include soil moisture sensors, weather stations, and rainfall shut off devices. <br />M <br />