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<br />Euclid Street Zone Change/Subdivision ER 2005-138 <br /> <br />The proj ect site is located wi thin the Los Alami tos/East <br />Garden Grove/Bolsa Chica sub watershed of the Santa Ana <br />Watershed. The Santa Ana River watershed is under the <br />jurisdiction of the Santa Ana Regional Water Quality <br />Control Board and subject to the objectives, water quality <br />standards and Best Management Practice requirements <br />established in the Santa Ana River Basin Plan and Orange <br />County Drainage Area Management Plan. The City of Santa Ana <br />implements the goals, obj ecti ves and requirements of the <br />Basin Plan and Drainage Area Management Plan through the <br />City's Local Implementation Plan. <br /> <br />The proj ect site storm water flows would drain by sheet <br />flow southerly along Euclid Street to the East Garden Grove <br />Wintersburg Channel ultimately discharging into the Pacific <br />Ocean near Bolsa Chica State Beach. The Santa Ana Regional <br />Water Quality Control Board has identified the mouth of the <br />east Wintersburg Channel at the Pacific Ocean an impaired <br />water body. <br /> <br />The primary source of potential adverse water quality <br />impacts associated with the operation of the proposed <br />project would be from urban runoff flows. Urban runoff is <br />defined as runoff that occurs during periods that are not <br />usually associated with rainfall, and are most commonly <br />produced from landscaping irrigation, leaking pipes, and <br />water used to wash off surfaces tributary to the street. <br />Since urban runoff flows usually originates in the street, <br />they commonly contain many common pollutants found in <br />streets such as oil and grease and sediment. Such impacts <br />could potentially be in conflict with water quality <br />standards established by the State Regional Water Quality <br />Control Board. However, given the scale of the proposed <br />project nuisance flows are expected to be minimal and would <br />have a less than significant water quality impact. <br />Additionally, during construction operations erosion <br />control measures and other Best Management Practices would <br />be employed to minimize construction-related water quality <br />impacts. <br /> <br />B. Substantially deplete groundwater supplies or interfere <br />substantially with groundwater recharge such that <br />there would be a net deficit in aquifer volume or a <br />lowering of the local groundwater table level. <br /> <br />Q. Have a potentially significant adverse impact on <br />groundwater quality? <br /> <br />15 <br /> <br />75A-34 <br />