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Nitrate Loading Calculations: <br /> Vanable Value Units Description <br /> Q 420 gallons per day Effluent flow rate from report <br /> Nw 35 mg/L-N Effluent stream concentration from report <br /> A 10.0 acres Site area from report <br /> Nb 1.00 mg/L-N Concentration of rain water from report <br /> d 0.30 constant Denitrification factor from report <br /> R 3.12 inches per year Recharge rate of rainfall from report(evapotranspiration method) <br /> W 0.6 inches per year Uniform waste water loading for site calculation result <br /> Nc 4.6 mg/L-N RESULT. Long-term average concentration of percolating effluent <br /> Find Variable(W <br /> (W) in = (Q) gal x 1 ft3 x63 5 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 /> 0.56 in/yr(site)=420 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/10 acres) <br /> Hantzsche-Fennemore Equation(Nc): <br /> Nc= WN,j1-d)+RN, <br /> W+R <br /> 4.6 mg/L-N=((0.56 in/yr x 35 mg/L-N x(1-0.3))+(3.12 in/yr x 1mg/L-N))/(0.56 in/yr+3.12 in/yr) <br /> Assumptions: <br /> 1. Total nitrogen concentration of influent waste stream is 35 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 30%. <br /> 3. Estimated deep percolation of rainfall is 3.12 intyr. <br /> 4. Background nitrate-N concentration of rainfall is 1 mg/L-N. <br /> Nitrate Loading Calculation Plate No.: 16 <br /> Project No: 1921 <br /> Ng Property Date: May 13,2019 <br /> LIVE OAK 7670 E.Melton Rd. <br /> GEO ENVIRONMENTAL INC. Manteca,CA <br />