Laserfiche WebLink
Table 2. Assumptions for Nitrate Loading Calculation <br /> Variable Value Units Description <br /> Q 560 gpd Effluent flow rate <br /> Nw 35 mg/L-N Effluent stream concentration <br /> A 5.35 acres Site area <br /> Nb 1.00 mg/L-N Concentration of rain <br /> d 0.35 constant Denitrification factor <br /> R 12.60 yea es per Deep percolation of rain water <br /> inches per <br /> W 1.4 year Uniform waste water loading (calculated) <br /> The results of the calculation are presented in the following table. <br /> Table 3. Result of Nitrate Loading Calculation <br /> Variable Value Units Description <br /> Nc 3.2 mg/L-N Long-term average concentration of percolating <br /> 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 on-site septic systems on the Site is predicted to be 3.2 mg/L-N. <br /> LOGE 1918 Page 8 <br />