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The general area consists of vineyard, orchard, agricultural land, and rural residences. A large dairy is located approximately 900 feet east and southeast of the Site. Septic Permit History in the Vicinity Based on a review of septic permits on file at the San Joaquin County Environmental Health Department for nearby properties, it appears that most septic systems in the area utilize leach lines or leach lines with sumps. The septic permits can be found in Appendix 3 of this report. Expected On-Site Maximum Septic Tank Usage Maximum expected septic usage on the Site would be from the employees and customers of the winery and olive mill. Ground Water Information Depth and Gradient Live Oak reviewed ground-water elevation information available from the San Joaquin County Flood Control and Water Conservation District to determine the ground-water levels near the Site. Data from the spring and fall of 2016 were the most recent available from this source (Plates 5 and 6). According to an analysis of these maps, the ground-water elevation in the area is approximately 10 to 18 feet below mean sea level. The ground-water flow direction is to the southeast at a rate of approximately four to six feet per mile. Given that the ground elevation of the Site is approximately nine to 10 feet above sea level, based on the County ground-water maps the depth to ground water below the Site is estimated to be 19 to 28 feet below ground surface. According to the Geotechnical Investigation prepared by Neil O. Anderson & Associates (2014), ground water was encountered in a boring on the Site at a depth of approximately 23 feet below ground surface. The report notes that the "test hole was not allowed to remain open for an extended period of time; therefore, the actual groundwater depth should be considered approximate." Potential Ground Water Contamination Issues The Soil Suitability Study is not intended to be an investigation into ground-water contamination sources, and no such investigation was conducted. Many sources can contribute to ground-water contamination, including leaking underground storage tanks, agricultural activities, dairies and cattle ranches, septic systems, and storm water infiltration. Agricultural activities and the use of septic systems in the area are known ground-water contamination sources with the potential to impact the Site. LOGE 20-02 Page 3