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Based on the methods and assumptions described, the nitrate loading calculation <br /> indicates that the use of an on-site septic tank and drain field system on the Site has the <br /> potential to cause a buildup of nitrate in the aquifer up to 36.2 mg/L-N for the proposed <br /> fueling center. This value exceeds the MCL of 10 mg/L-N. It should be remembered <br /> that the Hantzsche and Finnemore equation is a conservative method for determining <br /> potential impacts, and the clay soil in the area may serve to limit the transportation of <br /> nitrate to the aquifer. <br /> Septic system construction utilizing leach lines or a filter bed should follow the San <br /> Joaquin County On-Site Wastewater Treatment Systems Standards (2017) where <br /> applicable. Based on the result of the nitrate loading calculation, an engineered nitrate- <br /> mitigating septic system is recommended for the proposed project. <br /> LOGE 2240 Page 17 <br />