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Table 7. Result of Nitrate Loading Calculation <br /> Variable Value Units Description <br /> Long-term average concentration of percolating <br /> Nc 1.83 mg/L-N effluent <br /> The US EPA recommended MCL for nitrate in drinking water is 10 mg/L-N. In a worst- <br /> case situation, the maximum buildup of nitrates from the use of septic systems in the <br /> aquifer is predicted to be 1.83 mg/L-N. The result of the nitrate loading estimate is well <br /> below the maximum drinking water standard. <br /> Special Events Scenario <br /> Although no special events are planned for the winery at this time, Mr. Bokisch indicated <br /> that in the future he may wish to host events. He stated that a maximum of four special <br /> events could be held per year; attendance at each event could include up to 300 <br /> people. <br /> A second nitrate loading estimate was prepared to address the additional waste water <br /> flow from these potential special events. In this situation, the maximum buildup of <br /> nitrates from the use of septic systems in the aquifer is predicted to be 1.87 mg/L-N. <br /> Details of the additional calculation are presented in Appendix 6. <br /> Discussion of Nitrate Loading Results <br /> Total Nitrate Impact <br /> Based on the method and assumptions described, the result of the nitrate loading <br /> estimate indicates that the existing and proposed development on the Site should not <br /> cause a buildup of nitrates in the aquifer above 10 mg/L-N. Because of the satisfactory 121-2-/ <br /> result, no mitigation measures are warranted. <br /> �" LOGE 1402 Page 14 <br />