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<br /> 2.5 Irrigation Design Plan <br /> (A) For the efficient use of water, an irrigation system shall meet all the requirements <br /> listed in this section and the manufacturer's recommendations. The irrigation <br /> system and its related components shall be planned and designed to allow for <br /> proper installation, management, and maintenance. An irrigation design plan <br /> meeting the following design criteria shall be submitted as part of the Landscape <br /> Documentation Package. <br /> (1) System <br /> (a) A separate landscape meter and backflow prevention device shall <br /> be installed for the irrigation system. Dedicated landscape water <br /> meters are highly recommended on landscaped areas smaller than <br /> 5,000 square feet to facilitate water management. <br /> (b) Automatic irrigation controllers utilizing either evapotranspiration <br /> or soil moisture sensor data shall be required for irrigation <br /> scheduling in all irrigation systems. <br /> (c) The irrigation system shall be designed to ensure that the dynamic <br /> pressure at each emission device is within the manufacturer's <br /> recommended pressure range for optimal performance. <br /> i. If the static pressure is above or below the required dynamic <br /> pressure of the irrigation system, pressure-regulating devices <br /> such as inline pressure regulators, booster pumps, or other <br /> devices shall be installed to meet the required dynamic <br /> pressure of the irrigation system. <br /> ii. Static water pressure, dynamic or operating pressure, and flow <br /> reading of the water supply shall be measured at the point of <br /> connection. These pressure and flow measurements shall be <br /> conducted at the design stage. If the measurements are not <br /> available at the design stage, the measurements shall be <br /> conducted at installation. <br /> (d) Sensors (rain, freeze, wind, etc.), either integral or auxiliary, that <br /> suspend or alter irrigation operation during unfavorable weather <br /> conditions shall be required on all irrigation systems, as <br /> appropriate for local climatic conditions. Irrigation should be <br /> avoided during windy or freezing weather or during rain. <br /> (e) Manual shut-off valves (such as agate valve, ball valve, or <br /> butterfly valve) shall be required as close as possible to the point of <br /> connection of the water supply to minimize water loss in case of an <br /> emergency (such as a main line break) or routine repair. <br /> 10 <br /> 75A-39 <br /> <br />