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i <br /> I <br /> Worksheet No. 2 <br /> I <br /> Nitrate Mass Balance Calculation <br /> Data Input <br /> Effluent Quantity: 3,840 gals/day Site Acreage (A): 126.35 A <br /> Effluent Stream N: 45.00 mg/L-N Concentration Rain N: 0.17 mg/L-N <br /> Waste Loading (W): 0.41 iW Denitrification: 25.0% <br /> Deep Percolation of Rain: 2.54 in <br /> Result <br /> Mass Balance (Nc): 4.82 my/L-N <br />! MCLDrinking Water: 10.0 mglL-N <br /> Percent of MCL: 48% <br /> Equation <br /> No = WNw(1-d)+RNb <br /> W+R <br /> Variables <br /> Nc=Average nitrate-N concentration (mgA) of combined effluent and rainfall percolate (4.82 mg/L-N). <br /> W= Uniform waste water loading for study area (in/yr) <br /> Nw=Total nitrate-N concentration of waste water percolate (45 mg/L-N). <br /> j d= Fraction of nitrate-N loss due to Denitrification in the soil (25%). <br /> R= Uniform deep percolation of rainfall (2.54 in/yr). <br /> Nb= Background nitrate-N concentration of rainfall (0.17 mg/L-N). <br /> a <br /> i Assumptions <br /> 1. Nitrate-N concentration of waste stream based on estimate of 45 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 26%. <br /> Assumption based on work from Hantzsche and Finnemore, 1991_ <br /> 3. .Estimated deep percolation of rainfall is 2.54, see Worksheet No. 1. <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 /> NEIL O.ANDERSON&ASSOC.,INC. y <br /> OEOTECNNCAL 39"XES-MMEMNO"BOWTORIM x w <br /> 22 HouiA—U.Lad.G 03M O ~ <br /> Gaol <br /> SSOL <br /> plate 9 <br />