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The general area consists of rural residential, industrial, and vacant land. A residential <br /> subdivision is located across Highway 99, and a mobile home <br /> g y park is located <br /> immediately to the south of the Site. <br /> Septic Permit Hisloty in the Vicinity <br /> Based on a recent review of septic permits on file at the San Joaquin County <br /> Environmental Health Department for nearby properties, the majority of septic systems <br /> in the area utilize leach lines and seepage pits. The septic permits can be found in <br /> Appendix 4 of this report. <br /> Expected On-Site Maximum Septic Tank Usage <br /> Maximum expected usage on the Site would be from the truck and trailer repair facility. <br /> p tY <br /> C2,3� Septic syste design should be based on the On-Site Wastewater Disposal Standards �3 <br /> (2003) or other engineering recommendations. <br /> Ground Water Information <br /> Deptli and Gradient <br /> Live Oak reviewed ground water elevation information available from the San Joaquin <br /> County Flood Control and Water Conservation District to determine the ground water <br /> levels near the Site. Data from spring and fall of 2009 were the most recent available <br /> from this so rce. According to an analysis of these maps (Plates 6 and 6), ground <br /> water elevation is 29 to 33 feet below mean sea level; ground water flows toward the <br /> northeast or east at a rate of three to seven feet per mile in the vicinity of the Site. 1 <br /> <J <br /> Given that the ground elevation of the Site is approximately 30 feet, the depth to water <br /> below the Site is estimated to be 59 to 63 feet, depending on the time of year. <br /> Potef ttial Ground Water Contamination Issues <br /> The Soil SL itability Study is not intended to be an investigation into ground-water <br /> contamination sources, and no such investigation was conducted. Many sources can <br /> \ contribute to ground water contamination, including leaking underground storage tanks, <br /> ' agricultural activities, dairies, septic systems, and storm water infiltration. Agricultural <br /> activities and the use of septic systems in the area are known ground water <br /> contaminatic n sources with the potential to impact the Site. <br /> On-Site Wells <br /> One domestic well exists on the Site, as depicted on Plate 2. This well serves the C�3� <br /> existing shop building. No well permits for the Site were identified at the San Joaquin <br /> County Environmental Health Department. <br /> LOGE1025 Page 3 <br />