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Nitrate Loading Calculations: <br /> Variable Value Units Description <br /> Q 25.7 gallons per day Effluent flow rate from report <br /> Nw 85 mg/L-N Effluent stream concentration from report <br /> A 4.10 acres Site area from report <br /> Nb 0.17 mg/L-N Concentration of rain water from report <br /> d 0.25 constant Denitrification factor from report <br /> R 9.42 inches per year Recharge rate of rainfall from report(evapotranspiration method) <br /> W 0.1 inches per year Uniform waste water loading for site calculation result <br /> Nc 0.7 mg/L-N RESULT: Long-term average concentration of percolating effluent <br /> Find Variable(W: <br /> (W) in— = (Q) x 1 W x 365 days) 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 /> 0.08 in/yr(site)=26 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/4.1 acres) <br /> Hantzsche-Fennemore Equation(Nc): <br /> N�= WN,(1-d)+RN, <br /> W+R <br /> 0.73 mg/L-N=((0.08 in/yr x 85 mg/L-N x(1-0.25))+(9.42 in/yr x 0.17mg/L-N))/(0.08 ir✓yr+9.42 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 9.42 in/yr. <br /> 4. Background nitrate-N concentration of rainfall is 0.17 mg/L-N. <br /> Plate No.: 14 <br /> Nitrate Loading Calculation <br /> Woodbridge Truck Project No: 2107 <br /> LIVE OAK 19320&19351 Date: April 5,2021 <br /> N.St.Rt.99 W. Frontage Rd. <br /> GEO ENVIRONMENTAL INC. Acampo,CA <br />