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FAI <br /> n <br /> Nitrate Mass Balance Calculation <br />` i <br /> Data Input: <br /> r- j Site Area (A): 25.0 Acres <br /> Effluent Quantity (Q): 343 gals/day Concentration Rain (Nb): 0.17 mg/L-N <br /> Effluent Stream (NI): 45.00 mg/L-N Denitrification (d): 25.0% <br /> Waste Loading (1N): 0.18 irVyr Deep Pere. of Rain (R): 7.86 in <br /> Result: <br /> Mass Balance (NI}: 0.94 mg/L-N <br /> j MCLDrinking Water: 10. mg/L-N <br /> Percent of MCL: 9% <br /> , i <br /> Equations: i <br /> (VII) in = (Q) gal x 1 W x 365 day x 1 acre x 12 in x 1 <br /> yr day 7.48 gal 1 year 43,560 ft2 1 ft (A) acres <br /> Nr ffi _.I= WNw(1-d)+RNb i <br /> M <br /> L W+R <br /> Variables: i <br /> F7 Ne= Average nitrate IN concentration (mg/1) of combined effluent and rainfall percolate (0.94 mg/L-N). i <br /> �. W= Uniform waste water loading for study area (in/yr). <br /> 343 gals/day on a 25 acre site (0.18 in/yr). <br /> Nw=Total nitrate-N concentration of waste water percolate (45 mg/L-N). <br /> d = Fraction of nitrate-N loss due to denitrification in the soil (25%). <br /> R= Uniform deep percolation of rainfall (7.86 in/yr). <br /> Nb= Background nitrate-N concentration of rainfall (0.17 mg/L-N). <br /> L. 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 25%. <br /> Assumption based on work from Hantzsche and Finnemore, 1991. <br /> 3. Estimated deep piercolation of rainfall is 7.86 in/yr, 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 /> Fj <br /> i <br /> F <br /> a";. <br /> IDas <br /> NEIL O.ANDERSON&ASSOC.,INC. s <br /> CEOIEQiNCAL SERVICES-EN[�NEBtNG LABORATORE8 <br /> L- Zw <br /> 72H—d—LLodi.CA 0.4Q/C O <br /> (2W�767.3701 <br /> .PLATE 12 <br />