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• The details of the nitrate loading calculation are included in Plate 8. The results of the <br /> calculation are presented in the following table. <br /> Table 3. Result of Nitrate Loading Calculation <br /> Variable Value Units Description <br /> Long-term average concentration of percolating <br /> Nc 7.9 mg/L-N effluent <br /> The US EPA recommended Maximum Contaminant Level (MCL) for nitrate in drinking <br /> water is 10 mg/L-N. In a worst-case situation, the maximum buildup of nitrates in the <br /> aquifer from the use of an on-site septic system is predicted to be 7.9 mg/L-N. It should <br /> be noted that the existing level of nitrate in the ground water is already approaching 10 <br /> mg/L-N. <br /> • <br /> • LOGE 1818 Page 9 <br />