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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 1680 gallons per day Effluent flow rate from report <br /> Nw 35 mg/L-N Effluent stream concentration from report <br /> A 31.15 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 0.7 inches per year Uniform waste water loading for site calculation result <br /> Nc 3.0 mg/L-N RESULT. Long-term average concentration of percolating effluent <br /> Find Variable (W). <br /> (VV) in = (Q) gal x 1 ft3 x 365 day(s) x 1 acre <br /> x 12 in x 1 site <br /> 0.72 in/yr(site)= 1,680 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(i site/31.15 acres) <br /> Hantzsche-Fennemore Equation (Nc): <br /> N,= WN„.(1-d)+RNe <br /> W+R <br /> 2.95 mg/L-N=((0.72 in/yr x 35 mg/L-N x(1-0.2)) +(9.3 in/yr x 1 mg/L-N))/(0.72 in/yr+9.3 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 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 14,2019 <br />