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Plate 1. <br /> Affonso Property <br /> Nitrate Mass Balance Calculation <br /> Nitrate Loadinq Calculations: <br /> Variable Value Units Description <br /> Q 400 gallons per day Effluent flow rate from report <br /> Nw 35 mg/L-N Effluent stream concentration from report <br /> A 2.83 acres Site area from report <br /> Nb 0.30 mg/L-N Concentration of rain water from report <br /> d 0.35 constant Denitrification factor from report <br /> R 3.86 inches per year Recharge rate of rainfall from report(evapotranspiration method) <br /> W 1.9 inches per year Uniform waste water loading for site calculation result <br /> Nc 7.7 mg/L-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 x 12 in x 1 site <br /> yr day 7.48 gal 1 year 43,560 ft2 1 ft (A) acre(s) <br /> 1.9 in/yr(site) =400 gaUday x(1 cu-ft/7.48 gals)x (365 days/1 year)x(1 acre 143,560 sq-R)x(12 in/1 R)x(1 site 12.83 acres) <br /> Hantzsche-Fennemore Equation (Nc): <br /> N,= WN..(1-d)+RN.. <br /> W+R <br /> 7.71 mg/L-N=((1.9 in/yr x 35 mg/L-N x(1 -0.35)) +(3.86 intyr x 0.3mg/L-N))/(1.9 in/yr+3.86 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 3.86 in/yr. <br /> 4. Background nitrate-N concentration of rainfall is 0.3 mg/L-N. <br /> LOGE 20-22 July 6, 2020 <br />