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<br />Pleasanton Gateway Environmental Checklist <br /> <br />f) Wildlands do not exist within or adjacent to the subject site. Therefore, this would be catego- <br />rized as no-impact. <br /> <br />8. HYDROLOGY AND WATER QUALITY <br /> <br />Environmental Setting <br /> <br />The subjcct property is vacant and relatively t1at. Surrounding propertics and uses include Stanley Bou- <br />levard and the Union Pacific Railroad to the north, a variety of commercial!industrial! service uses to the <br />west, the P.G. & E, substation to the east, and the Templc Beth Emek Synagogue to thc south. At its <br />closest point, the Arroyo Del Valle is approximatcly 200 feet from its northernmost bank to the site. <br /> <br />The National Pollutant Discharge Elimination System (NPDES) was established in the Clean Water Act <br />to regulatc municipal and industrial discharges to surface watcrs of the U.S, Non-point sourccd diffuse <br />and originate over a wide arca rather than from a definable point. Two typcs of non-point sourcc dis- <br />charges are controlled by the NPDES program; dischargcs caused by gencral construction activities and <br />general quality of storm water in municipal storm water systems. <br /> <br />Standards of Significance <br /> <br />For purposes of this environmental document, an impact is considered significant if the proposed project <br />would: <br /> <br />· Result in substantially degrading water quality or violate any water quality objectives set by thc <br />State Water Resources Control Board due to increased sediments or other contaminants gener- <br />ated by consumption and/or operation activities; <br />· Result in exposing people or property to the risk of injury and damage in the event of a 100-year <br />t1ood. <br /> <br />Issues <br /> <br />Potentially <br />Significant <br />Impact <br /> <br />Less Than <br />Significant <br />With Mitigation <br />Incorporated <br /> <br />I.css Than <br />Significant <br />Impact <br /> <br />No <br />Impact <br /> <br />Hvdrolo!!V and Water Qualitv <br />Would the project: <br /> <br />a) Violate any water quality standards or waste discharge <br />requirements? <br /> <br />D <br /> <br />D <br /> <br />w <br /> <br />D <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 (e.g., the <br />production rate of pre-existing nearby wells would <br />drop to a level which would not support existing land <br />uses or planned uses for which permits have been <br />granted)? <br /> <br />D <br /> <br />D <br /> <br />D <br /> <br />[K] <br /> <br />Pleasanton Gateway Initial Study <br /> <br />Page 24 of 37 <br /> <br />November 8, 2006 <br />