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Nitrate Mass Balance Equation <br /> Data Input <br /> Persons: See Plate 9b Site Acreage (A): 12.25 A <br /> Use: See Plate 9b Concentration Rain N: 0.17 mg/L-N <br /> Effluent Quantity: See Plate 9b Denitrification: 25.0% <br /> Effluent Stream N: See Plate 9b Deep Percolation of Rain: 8.31 in <br /> Waste Loading (W): See Plate 9b <br /> Result <br /> Mass Balance (Nc): See Plate 9b <br /> MCLDrinking Water: 10. mg/L-N <br /> Percent of MCL: See Plate 9b <br /> Equation <br /> NC = WNw(1-d)+RNb <br /> W+R <br /> Variables <br /> Nc = Average nitrate-N concentration (mg/1-N) of combined effluent and rainfall percolate. <br /> W = Uniform waste water loading for study area (in/yr) <br /> Nw= Total nitrate-N concentration of waste water percolate. <br /> d = Fraction of nitrate-N loss due to Denitrification in the soil (25%). <br /> _. R = Uniform deep percolation of rainfall (8.31 in/yr). <br /> Nb= Background nitrate-N concentration of rainfall (0.17 mg/L-N). <br /> Assumptions <br /> 1. Nitrate-N concentration of waste stream based on <br /> work from Hantzsche and Finnemore, 1991. <br /> 2. Fraction of nitrate-N loss due to Denitrification in the soil is assumed to be 25%. <br /> Assumption based on work from Hantzsche and Finnemore, 1991. <br /> 3. Estimated deep percolation of rainfall is 8.31, see percolation worksheet Plate 8 <br /> 4. Assume background nitrate-N concentration of rainfall is (0.17 mg/L-N) based on range by <br /> Hantzsche and Fennemore, 1991. <br /> C <br /> NEIL O.ANDERSON&ASSOC.,INC.LXA9IIlWolminL�.CA VM 7aa \ <br /> Plate 9a <br />