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Nitrate Loading Calculations: <br /> Variable Value Units Description <br /> Q 1219.5 gallons per day Effluent flow rate from report <br /> Nw 62.0 mg/L-N Effluent stream concentration from report <br /> A 18.54 acres Site area from report <br /> Nb 0.3 mg/L-N Concentration of rain water from report <br /> d 0.25 constant Denitrification factor from report <br /> R 8.16 inches per year Recharge rate of rainfall from report(evapotranspiration method) <br /> W 0.9 inches per year Uniform waste water loading for site calculation result <br /> Nc 4.8 mg/L-N RESULT: Long-term average concentration of percolating effluent <br /> Find Variable(Vy): <br /> (VV) in = (Q) gel x 11 W x 365 day(s) x 1 acre x 12 in x 1 site <br /> yr day 7.48 gal 1 year 43,560 ft2 1 ft (A)acre(s) <br /> 0.88 in/yr(site)=1,220 gal/day x(1 cu-ft/7.48 gals)x(365 days/1 year)x(1 acre/43,560 sq-ft)x(12 in/1 ft)x(1 site/18.54 acres) <br /> Hantzsche-Fennemore Equation(Nc): <br /> N,= WN.j1-d)+RN,. <br /> W+R <br /> 4.82 mg/L-N=((0.88 in/yr x 62 mg/L-N x(1-0.25))+(8.16 in/yr x 0.3mg4.-N))/(0.88 in/yr+8.16 in/yr) <br /> Assumptions: <br /> 1. Total nitrogen concentration of influent waste stream is 62 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 25%. <br /> 3. Estimated deep percolation of rainfall is 8.16 in/yr. <br /> 4. Background nitrate-N concentration of rainfall is 0.3 mg/L-N. <br /> Plate No.:16 <br /> Nitrate Loading Calculation <br /> California Islamic Center Project No: 1939 <br /> LIVE OAK 12882 N.Lower Sacramento Rd. Date: August 26,2019 <br /> GEO ENVIRONMENTAL INC. Lodi,CA <br />