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<br />S. Impact aquatic, wetland or riparian habitat? <br /> <br />Potentially Significant Unless Mitigation Incorporated <br /> <br />The project site is located within the Santa Ana River Watershed <br />and the San Diego Creek sub-watershed. Water quality within the <br />watershed is under the jurisdiction of the Santa Ana Regional <br />Water Quality Control Board and subject to the objectives, water <br />quality standards and Best Management Practice requirements <br />established in the Santa Ana River Basin Plan and the Orange <br />County Drainage Area Management Plan. The City of Santa Ana <br />implements the goals, obj ecti ves and requirements of the Basin <br />Plan and Drainage Area Management Plan through the City's Local <br />Implementation Plan. <br /> <br />The project site consists of 81,022 square feet of area of which <br />15,300 square feet of area would consist of pervious landscape <br />areas. Presently, the project site is vacant and without <br />structural Best Management Practices to minimize long-term water <br />quality impacts associated with the operation of the proposed <br />project. <br /> <br />The project site storm water flows would drain by sheet flow <br />along the project parking lot to an existing underground storm <br />drain located near the western boundary of the project site. The <br />drainage flows would be conveyed southerly to the Santa <br />Ana/Santa Fe open storm drain before ultimately discharging into <br />the lower Newport Back Bay. The Santa Ana Regional Water Quality <br />Control Board has identified the Lower Newport Back Bay as an <br />impaired water body. <br /> <br />Short-Term Construction Related Water Quality Impacts <br /> <br />During construction operations there is the potential that <br />surface water runoff could be degraded. If the degraded surface <br />water runoff is conveyed into the local storm drain system, <br />potential adverse water quality impacts could occur to <br />downstream receiving waters. To minimize potential construction <br />related water quality impacts, the proposed project would be <br />required to prepare and implement a storm water pollution <br />prevention plan. <br /> <br />Long Term Operational Water Quality Impacts <br /> <br />The primary concern for water quality pollutants associated with <br />the operation of the proposed project would be from urban <br />runoff. Urban runoff is defined as runoff that occurs during <br /> <br />17 <br /> <br />3~5;31 <br />