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Nitrate Loading Calculations: <br /> Variable Value Units Descriplion <br /> Q 1547.5 gallons per day Effluent flow rate from report <br /> Nw 85.0 mg/L-N Effluent stream concentration from report <br /> A 4.10 acres Site area from report <br /> Nb 0.136 mg/L-N Concentration of rain water from report <br /> d 0.35 constant Denitrification factor from report <br /> R 2.67 inches per year Recharge rate of rainfall from report(evapotranspiration method) <br /> W 5.1 inches per year Uniform waste water loading for site calculation result <br /> Nc 36.2 mg/L-N RESULT. Long-term average concentration of percolating effluent <br /> Find Variable(W <br /> (W) in = (Q) ggi x 1W x 365365 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 /> 5.07 in/yr(site)=1,548 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 /> Nc= WN.J1-d)+R& <br /> W+R <br /> 36.25 mg/L-N=((5.07 in/yr x 85 mg/L-N x(1-0.35))+(2.67 in/yr x 0.136mg4--N))/(5.07 in/yr+2.67 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 35%. <br /> 3. Estimated deep percolation of rainfall is 2.67 in/yr. <br /> 4. Background nitrate-N concentration of rainfall is 0.136 mg/L-N. <br /> Nitrate Loading Calculation Plate No.: 14 <br /> Project No: 2240 <br /> Proposed Arco&AM/PM <br /> LIVE OAK 7500 W.Eleventh St. Date: September 28,2022 <br /> GEO ENVIRONMENTAL INC. Tracy,CA <br />