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9.0 EIR Subject Areas Requiring No Change in Analysis <br />Avion Project SEIR <br />Page 9-9 <br />9.10.5 Water Supply and Service <br />The 1998 EIR concluded that although buildout of the Subarea Plan would increase water service <br />demand, the increase was not a significant impact with the implementation of conservation <br />measures and recycled water systems. The 1998 EIR included the following mitigation measures, <br />which would be incorporated into future development project design guidelines to address <br />cumulative water usage concerns. <br />1. Limit grading in areas where no construction is proposed; thereby reducing the need for <br />planting and irrigation of graded areas. <br />2. Provide lifts of low-clay content soil in landscaped areas to improve infiltration. <br />3. Reduce runoff potential from landscaped areas by using berming, raised planters, and drip <br />irrigation systems. <br />4. Install soil moisture override systems in all common irrigation areas to avoid sprinkling when <br />the ground is already saturated. <br />5. Identify in the plant materials list in the project design guidelines whether or not plants are <br />native or naturalize easily and incorporate a list of local California sources for native plants. <br />6. Incorporate low-flush toilets, low-flow faucets, and timers on sprinklers (including nighttime <br />watering) into project design. <br />7. Provide information regarding water conservation measures to new residents at the time of <br />lot purchase. <br />The Development Coordinator would review grading, landscape, and building permits to ensure that <br />the above measures have been noted on plans. <br />A Water Supply Assessment and Water Supply Verification Report were prepared for the 2009 <br />Subarea Plan Amendment project by the City Water Department (November 2008) in compliance <br />with the requirements of Senate Bill 610 and Senate Bill 221. The water reports identified that the <br />water demand projections for the amendment project were included in the water demand forecasts <br />within the Urban Water Management Plan and other water resource planning documents of the <br />Water Department, the San Diego County Water Authority, and Metropolitan Water District. Water <br />supplies necessary to serve existing demands, projected demands of the Subarea Plan Amendment <br />project, and future water demands within the Water Department's service area, as well as the <br />actions necessary to develop these supplies, have been identified in the water supply planning <br />documents of the Water Department, the San Diego County Water Authority, and the Metropolitan <br />Water District. <br />The project is consistent with the land use and buildout assumptions and conceptual development <br />footprint identified in the Subarea Plan and subsequent Subarea Plan Amendment. Additionally, the <br />project would implement all water conservation measures identified in the MMRP for the 1998 EIR <br />(see Section 9.11, below).