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Plate 3. <br /> Bavaro Property <br /> Nitrate Mass Balance Calculation <br /> (Reduced Rainfall Method) <br /> Nitrate Loading Calculations: <br /> Variable 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 5.00 acres Site area from report <br /> Nb 1.00 mg/L-N Concentration of recharge waters from report <br /> d 0.20 constant Denitrification factor from report <br /> R 9.3 inches per year Recharge rate of percolating waters from report(reduced rainfall method) <br /> W 1.1 inches per year Uniform waste water loading for site calculation result <br /> Nc 3.9 mgiL-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 <br /> x 12 in x 1 site <br /> 1.13 inlyr(site) =420 gal/day x(1 cu-ftl7.48 gals)x(365 days/1 year)x(1 acre 143,560 sq-ft)x(12 in l 1 ft)x(1 site l5 acres) <br /> Hantzsche-Fennemore Equation(Nc): <br /> N,= WN 31-d)+RNe <br /> W+R <br /> 3.92 mglL-N=((1.13 inlyr x 35 mglL-N x(1-0.2))+(9.3 inlyr x 1mg/L-N))/(1.13 inlyr+9.3 inlyr) <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 20%. <br /> 3. Estimated deep percolation of recharge waters is 9.3 in/yr. <br /> 4. Background nitrate-N concentration of recharge waters is 1 mg/L-N. <br /> LOGE 1907 March 15,2019 <br />