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Nitrate Mass Balance Calculation <br /> Effluent Quantity (Q): 265.00 gals/day Site Area (A): 2.0 Acres <br /> Effluent Stream (N,): 55.10 mg/L-N Concentration Rain (Nb): 0.17 mg/L-N <br /> Waste Loading (W): 1.78 in/yr Denitrification (d): 15.0% <br /> Result: Deep Perc. of Rain (R): 6.79 in <br /> Mass Balance (Nj: 9.87mg/L-N <br /> MCLDrinking Water: 10.0 mg/L-N <br /> Percent of MCL: 98.67% <br /> Equations: <br /> 0 <br /> (W) in = (Q) -'f x 14 x 36� x 1 acre x 12 in x 1 <br /> yr "y 7.48_gal 1 year 43,560 ff2 1 A' (A}acre>� <br /> N, mg WN-(1-d)+RN, <br /> L W+R <br /> Variables: <br /> Nc= Average nitrate-N concentration (mg/1) of combined effluent and rainfall percolate (9.87 mg/L-N). <br /> W= Uniform waste water loading for study area (in/yr). <br /> 265 gals/day on a 2 acre site (1.78 in/yr). <br /> Nw= Total nitrate-N concentration of waste water percolate (55.1 mg/L-N). <br /> d = Fraction of nitrate-N loss due to denitrification in the soil (15%). <br /> R = Uniform deep percolation of rainfall (6.79 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 estimate of 55.1 mg/L-N. <br /> Assumption based on work from Hantzsche and Finnemore, 1991. <br /> 2. Fraction of nitrate-N loss due to Denitrification in the soil is assumed to be 15%. <br /> Assumption based on work from Hantzsche and Finnemore, 1991. <br /> 3. Estimated deep percolation of rainfall is 6.79 in/yr, see deep percolation of rain table. <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 /> F pE RS0 <br /> NEIL O.ANDERSON&ASSOC.,INC. 3 <br /> CEOTE04M CAL SERVICES-EN34NEERNG LABORATORIES 22 <br /> r <br /> 22 Ho—Ln.Lodi.CA 9520D O <br /> (20D(307-3701 q �o <br /> rS OL <br /> PLATE 11 <br />