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The general area consists of industrial properties, orchards, vineyards, and rural <br /> residences. A mobile home park is located approximately one-quarter mile northeast of <br /> the Site. <br /> Septic Permit History in the Vicinity <br /> Based on a review of septic permits on file at the San Joaquin County Environmental <br /> Health Department for nearby properties, most septic systems in the area utilize leach <br /> lines with seepage pits. The septic permits can be found in Appendix 4 of this report. <br /> Expected On-Site Maximum Septic Tank Usage <br /> Maximum expected usage on the Site would be from the future employees of Ford <br /> Construction and any other companies leasing space on the Site. Septic system design <br /> should be based on the San Joaquin County On-Site Wastewater Treatment Systems <br /> Standards (2017) or other engineering recommendations. <br /> Ground Water Information <br /> Depth 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 2016 were the most recent available <br /> from this source. According to an analysis of these maps (Plates 5 and 6), ground <br /> water elevation is approximately 30 to 38 feet below mean sea level; ground water flows <br /> predominantly toward the southeast at a rate of approximately six to 13 feet per mile in <br /> the vicinity of the Site. <br /> Given that the ground elevation of the Site is approximately 90 to 93 feet, the depth to <br /> water below the Site is estimated to be 120 to 131 feet, depending on the season. <br /> Potential Ground Water Contamination Issues <br /> The Soil Suitability 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 /> contamination sources with the potential to impact the Site. Several of the industrial <br /> properties to the north of the Site utilize storage ponds, which can be a source of <br /> contamination. <br /> LOGE 1848 Page 3 <br />