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LOGE 20-05: Lopes SSNLS Addendum Page 2 <br /> March 11, 2020 <br /> Table 1. Inputs and Results for Nitrate Loading Calculation, <br /> Wastewater Flow Calculated by March 2020 Method <br /> Variable Value Units Description <br /> Q 350 gpd Effluent flow rate <br /> Nw 35 mg/L-N Effluent stream concentration <br /> A 1.50 acres Site area <br /> Nb 0.3 mg/L-N Concentration of rain <br /> d 0.35 constant Denitrification factor <br /> R 5.54 inches per year Recharge rate of rainfall <br /> W 3.1 inches per year Uniform waste water loading (calculated) <br /> Nc 8.4 mg/L-N Long-term average concentration of percolating effluent <br /> For this Site, the long-term average concentration of percolating effluent is found to be <br /> 8.4 mg/L-N when calculated as shown. This value is below the US EPA recommended <br /> MCL for nitrate in drinking water of 10 mg/L-N. The nitrate loading calculation is <br /> attached. <br /> Please feel free to contact us with any questions about this project. <br /> Sincerely, <br /> Live Oak GeoEnvironmenfal, Inc. <br /> \pNAt <br /> Abigail Racco, Project Manager /a�� DAVID J.N(FLCH <br /> N0.2151 <br /> CERTIFIED <br /> ENGINEERING j; <br /> GEOLOGIST <br /> David J. Welch, CEG, CHG, PGP s�TFC1Ft;AJ <br /> CC: Allen Cain <br /> 7550 S. Amerigo Rd. <br /> Stockton, CA 95215 <br /> Attached: Nitrate Loading Calculation <br />