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Nitrate Loading Calculations: <br /> Vanable Value Units Description <br /> Q 152.5 gallons per day Effluent flow rate from report <br /> Nw 85.0 mg/L-N Effluent stream concentration from report <br /> A 0.94 acres Site area from report <br /> Nb 1.00 mg/L-N Concentration of rain water from report <br /> d 0.35 constant Denitrification factor from report <br /> R 11.50 inches per year Deep percolation of rain water from report <br /> W 2.18 inches per year Uniform waste water loading for site calculation result <br /> Nc 9.65 mg/L-N RESULT: Long-term average concentration of percolating effluent <br /> Find Variable(W): <br /> (W) in = (C) Qall x 1 ft3 x 365 day(s) x I acre x 12 in x 1 site <br /> yr day 7.48 gal 1 year 43,560 ft2 1 ft (A)acre(s) <br /> 2.16inlyr(site)=153 gal/day x(1 cu-6/748 gals)x(365 days/1 year)x(1 acre/43,560 sq-R)x(12 in/1 ft)x(1 site/0.94 acres) <br /> Hantzsche-Fennemore Equation(Nc): <br /> • Nc= WNw(1-d)+RN, <br /> W+R <br /> 9.65 mg/L-N=((2.18 in/yr x 85 mg1L-N x(1-0.35))+(11.5 in/yr x lmgrL-N))/(2.18 in/yr+11,5 iroyr) <br /> Assumptions: <br /> 1. Total nitrogen concentration of influent waste stream is 85 mg/L-N. If different influent concentrations exist,use weighted average <br /> 2. Fraction of nitrate-N loss due to denitrification in the soil is 35%. <br /> 3. Estimated deep percolation of rainfall is 11.5 inryr. <br /> 4. Background nitrate-N concentration of rainfall is 1 mg/L-N. <br /> AIIAL Nitrate Loading Calculation Plate No.: 11 <br /> • AJW Project No: 1806 <br /> KW Defense <br /> LIVE OAK 1640 N.Broadway Ave. Date: February 20,2018 <br /> GEO ENVIRONMENTAL INC. Stockton,CA <br />