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• "Estimated Applied Water Use" means the average annual total amount of water estimated to be necessary to keep plants in a healthy state, calculated as provided in the Standards. It is based on the reference evapotranspiration rate, the size of the landscape area, plant water use factors, and the relative irrigation efficiency of the irrigation system. "ET adjustment factor" or "ETAF is equal to the plant factor divided by the irrigation efficiency factor for a landscape project, as described in the Standards. The ETAF is calculated in the context of local reference evapotranspiration, using site-specific plant factors and irrigation efficiency factors that influence the amount of water that needs to be applied to the specific landscaped area. A combined plant mix with a site-wide average plant factor of 0.5 (indicating a moderate water need) and average irrigation efficiency of 0.71 produces an ET adjustment factor of (0.7) _ (0.5/0.71), which is the standard of water use efficiency generally required by this Article and the Standards, except that the ETAF for a special landscape area shall not exceed 1.0. "Standards" refers to the Standards for Implementation of this Article, as adopted by the City, which describes procedures, calculations, and requirements for landscape projects subject to this Article. "Hardscapes" means any durable material or feature (pervious and non-pervious) installed in or around a landscaped area, such as pavements or walls. Pools and • other water features are considered part of the landscaped area and not considered hardscapes for purposes of this Article. "Homeowner installed landscape" means any landscaping either installed by a private individual for a single family residence or installed by a licensed contractor hired by a homeowner. A homeowner, for purposes of this Article, is a person who occupies the dwelling he or she owns. This definition excludes speculative homes, which are not owner-occupied dwellings and which are subject under this Article to the requirements applicable to developer-installed residential landscape projects. "Irrigation efficiency' means the measurement of the amount of water beneficially used divided by the amount of water applied. Irrigation efficiency is derived from measurements and estimates of irrigation system characteristics and management practices. The minimum average irrigation efficiency for purposes of this Article is 0.71. Greater irrigation efficiency can be expected from well designed and maintained systems. "Landscaped area" means all the planting areas, turf areas, and water features in a landscape design plan subject to the Maximum Applied Water Allowance and Estimated Applied Water Use calculations. The landscaped area does not • include footprints of buildings or structures, sidewalks, driveways, parking lots, decks, patios, gravel or stone walks, other pervious or non-pervious hardscapes, Ordinance No. NS-2801 Page 19 of 23