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Nitrate Loading Calculations: <br /> Variable Value Units Description <br /> Q 1300 gallons per day Effluent flow rate from report <br /> Nw 85 mg/L-N Effluent stream concentration from report <br /> A 25.12 acres Site area from report <br /> Nb 1.00 mg/L-N Concentration of rain water from report <br /> d 0.25 constant Denitrification factor from report <br /> R 13.7 inches per year Deep percolation of rain water from report <br /> W 0.7 inches per year Uniform waste water loading for site calculation result <br /> Nc 4.0 mg/L-N RESULT. Long-term average concentration of percolating effluent <br /> Find Variable(W): <br /> (W) in = (Q) gsl 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 ftz 1 ft (A)acre(s) <br /> 0.7 in/yr(site)=1,300 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/25.12 acres) <br /> Hantzsche-Fennemore Equation(NC): <br /> N�= WNW(1-d)+M <br /> W+R <br /> 4.03 mg/L-N=((0.7 in/yr x 85 mg/L-N x(1-0.25))+(13.7 in/yr x 1 mg/L-N))/(0.7 in/yr+13.7 in/yr) <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 25%. <br /> 3. Estimated deep percolation of rainfall is 13.7 in/yr. <br /> 4. Background nitrate-N concentration of rainfall is 1 mg/L-N. <br /> Plate No.: 11 <br /> Nitrate Loading Calculation <br /> j1% Project No: 1848 <br /> Proposed Ford Construction Facility Date:January 23,2019 <br /> LIVE OAK 12505 E.Brandt Rd. <br /> GEO ENVIRONMENTAL INC. Lockeford,CA <br />