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assumptions for the nitrate loading calculations for the Site, as presented in Plates 17 <br /> and 18. <br /> Table 4. Assumptions for Nitrate Loading Calculations <br /> Variable Value Units Description <br /> Q 450 gpd Effluent flow rate (hypothetical future homes) <br /> Nw 35 mg/L-N Effluent stream concentration <br /> A(Parcel 1) 40.10 acres Area (Parcel 1) <br /> A(Parcel 2) 40.48 acres Area (Parcel 2) <br /> Nb 0.107 mg/L-N Concentration of rain <br /> d 0.25 constant Denitrification factor <br /> R 3.56 inches per year Recharge rate of rainfall <br /> W 0.15 inches per year Uniform wastewater loading, calculated <br /> The details of the nitrate loading calculations are included in Plate 17 and 18. The <br /> results of the calculations are presented in the following table. <br /> Table 5. Results of Nitrate Loading Calculation <br /> Variable Value Units Description <br /> Nc (Parcel 1) 1.2 mg/L-N Long-term average concentration of percolating effluent(Parcel 1) <br /> Nc (Parcel 2) 1.2 mg/L-N Long-term average concentration of percolating effluent(Parcel 2) <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 in the aquifer from the use of septic <br /> systems on the Site is predicted to be 1.2 mg/L-N for each parcel. <br /> LOGE 2307 Page 12 <br />