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Nitrate Loading Calculations., <br /> Variable Value Units Description <br /> Q 1050 gallons per day Effluent flow rate from report <br /> Nw 35 mg/L-N Effluent stream concentration from report <br /> A 4.83 acres Site area from report <br /> Nb 0.17 mg/L-N Concentration of rain water from report <br /> d 0.35 constant Denitrification factor from report <br /> R 6.24 inches per year Recharge rate of rainfall from report(evapotranspiration method) <br /> W 2.9 inches per year Uniform waste water loading for site calculation result <br /> Nc 7.4 mg/L-N RESULT: Long-term average concentration of percolating effluent <br /> Find Variable W <br /> (W) in = (Q) gal x 1 ft3 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 /> 2.92 in/yr(site)=1,050 gal/day x(1 cu-ft/7.48 gals)x(365 days/1 year)x(1 acre/43,560 sq-ft)x(12 011 ft)x(1 site/4.83 acres) <br /> Hantzsche-Fennemore Equation(NO: <br /> N�= WN N-d)+RNA <br /> W+R <br /> 7.37 mg/L-N=((2.92 in/yr x 35 mg/L-N x(1-0.35))+(6.24 in/yr x 0.17mg/L-N))/(2.92 in/yr+6.24 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 35%. <br /> 3. Estimated deep percolation of rainfall is 6.24 in/yr. <br /> 4. Background nitrate-N concentration of rainfall is 0.17 mg/L-N. <br /> Plate No.: 7 <br /> Nitrate Loading Calculation <br /> j9FTW APN 063-240-25 Project No: 2119 <br /> LIVE OAK 12448,12436,12472,12484 Date: April 21,2020 <br /> E.Harney Ln. <br /> GEO ENVIRONMENTAL INC. Lodi,CA <br />