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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 spring and fall of 2016 were the most recent available from this source. According to an analysis of these maps (Plates 5 and 6), ground water elevation is approximately 40 to 42 feet above mean sea level; ground water flows predominantly toward the north at a rate of approximately zero to seven feet per mile in the vicinity of the Site. Given that the ground elevation of the Site is approximately 71 to 78 feet, the depth to water below the Site is estimated to be 29 to 38 f ' t, depending on the season. Potential Ground Water Con�minatio ssues 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, 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. Live Oak reviewed the EHD's Water Well Data Table dated March 10, 2009 for nearby addresses that have been tested for nitrate and dibromochloropropane (DBCP), common ground-water contaminants in San Joaquin County. Three wells were identified within approximately 1.25 miles of the Site. All of the wells had been tested for nitrate; it was detected in all three, at concentrations of 28.0 to 63.0 mg/L-NO3. All of the wells had been tested for DBCP; it was not detected. The-Maximum Contaminant Level (MCL) set by the US EPA for nitrate as NO3 is 45 mg/L (10 mg/L-N); the MCL for DBCP is 0.2 µg/L. On-Site Wells No wells are currently located on the Site. No well permits were identified for the Site from among files at the San Joaquin County Environmental Health Department. Water Sample No water sample was collected as part of this investigation. LOGE 1846 Page 3