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Lopes Property <br /> Nitrate Mass Balance Calculation <br /> Nitrate Loading Calculations: <br /> Variable Value Units Description <br /> Q 350 gallons per day Effluent flow rate from report <br /> Nw 35 mg/L-N Effluent stream concentration from report <br /> A 1.50 acres Site area from report <br /> Nb 0.3 mg/L-N Concentration of rain water from report <br /> d 0.35 constant Denitrification factor from report <br /> R 5.54 inches per year Recharge rate of rainfall from report(evapotranspiration method) <br /> W 3.1 inches per year Uniform waste water loading for site calculation result <br /> Nc 8.4 mg/L-N RESULT. Long-term average concentration of percolating effluent <br /> Find Variable W <br /> (W) in = (Q) gal x 11 W 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 /> 3.14 in/yr(site)=350 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/1.5 acres) <br /> Hantzsche-Fennemore Equation(Nc): <br /> N,= WN,,,(1-d)+RN <br /> W+R <br /> 8.42 mg/L-N=((3.14 in/yr x 35 mg/L-N x(1-0.35)) +(5.54 intyr x 0.3mg1L-N))1(3.14 intyr+5.54 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 5.54 in/yr. <br /> 4. Background nitrate-N concentration of rainfall is 0.3 mg/L-N. <br /> LOGE 20-05 Addendum March 11,2020 <br />