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Pimlico Drive Turnoeet aced Pipeline Project Enviranventa/ Checklist underground storage tank will be encountered because ongoing site remediation has contained the plume within the gas station site and adjacent shopping center bowrdaries as reported to the State Water Resources Control Board (Ueotracker 2006) and the Santa Rita control valve vault will be about 6 feet below the ground surface above the groundwater level Therefore, this would be less than significant. e, f) No Impact. The project is located approximately 1.7 miles from the Livermore Airport and about 1.5 miles from the Camp Parks Heliport and is not within an airport land use plan and is not likely to result in a safety hazard for people residing or working in the area. Therefore, e and f would be no impact. g) Less than Significant. The Project facilities, including the pipeline and tie-in to the existing water transmission pipeline, fluoridation building, Lone 7 turnout and Santa Rita control valve vault locations, are not part of any adopted emergency response plans or emergency evacuation plans (City of Pleasanton 2005). Santa Rita Road is designated as amain arterial for evacuation northbound to Interstate 580 in the City of Pleasanton's Comprehensive Emergency Management Plan (City of Pleasanton 2005) but not the southbound lane. 'therefore, this would be less than significant. h) No Impact. Wildlands do not exist within or adjacent to the project (City of Pleasanton 1996). Therefore, this would be no impact. 8. HYDROLOGYAND WATER QUALITY Environmental Setting The National Pollutant Discharge Elimination System (NPDES) was established in the Clean Water Act to regulate municipal and industrial discharges to surface waters of the U.S. Non- point sources are diffuse and originate over a wide area rather than from a definable point. Two types of non-point source discharges are controlled by the NPDES program: 1) discharges caused by general construction activities; and 2) general quality of storm water in municipal stormwater systems. Standards of Si~niticance For purposes of this environmental document, an impact is considered significant if the proposed project would: • Result in substantially degrading water quality or violate any water quality objectives set by the State Water Resources Control Board due to increased sediments or other contaminants generated by consumption and/or operation activities; • Result in exposing people or property to the risk of injury and damage in the event of a 100 year flood. City of Pleasanton 34 Winzler & Kelly Draft Initial Study/Proposed Negative Declaration August 2006 04263501