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' rr 1./ <br /> Nitrate Mass Balance Calculation <br /> Data Input: <br /> Effluent Quantity(Q): 237ga1s/day Concentration Rain(Ni,): 1.00 mg/GN <br /> Effluent Stream (Nu,): 85.00 mg/L-N Denitrification (d): 35.0% <br /> Site Area(A): 4.00Acres Deep Perc. of Rain (R): 4.00/n/yr <br /> Result: <br /> Waste Loading (W): a80in/yr <br /> Mess Balance (NJ: 10.0 mg/L-N <br /> MCL Drinking Water Nitrate as N: 10.0 mg/L-N <br /> Percent of MCL Nitrate as N 100% <br /> Equations: <br /> (W) in = (Q) gal x _Lf2 x 365 day x 1 @ore x 12 in x 1 <br /> yr day 7,48 gal 1 year 43,560 fe 1 h (A)acre <br /> 0.8 in/yr(site)=237ga1/dayx(1 cu-If/7.48 gals)x(365 day$/1 year)x 0 acre/43,560 sq-R)x(12 in/I R)x(1 site/4 acres) <br /> N,= WN 1-d +RN Han ._a-Penne lore Equation Nc, <br /> W+R <br /> 10,01 mg/L-N=((0.8 in/yr x 85 mg/L-N x(1-0.35))+(4 in/yr x Img/L-N)J/( .8 A& 14 in/yr) <br /> Variables: <br /> Nc=Average nthate-N concentration(mg/1)of combined effluent and rainfall enolate(10.01 mg/L-N). <br /> W= Uniform waste water loading for Study area (in/yr)(0.8 inches/year). <br /> Nw =Total nitrate-N concentration of waste water percolate(85 mg/L-N). <br /> d = Fraction of nitrate-N loss due to denitrification in the soil <br /> R = Uniform deep percolation of rainfall(4 in/yr). <br /> Nb = Background nitrate-N concentration of rainfall(1 mg/L-N). <br /> Assumptions: <br /> 1. Total nitrogen concentration of waste stream based on estimate of 85 mg/1--N. <br /> 7.. Fraction of nitrate-N loss due to denitrification in the soil is assumed to be 3S%. <br /> 3. Estimated deep percolation of rainfall is 4 In/yr,see deep percolation of rain worksheet. <br /> 4. Assume background nitrate-N concentration of rainfall is 1 mg/L-N. <br /> "44 NEIL O. ANDERSON <br /> A N D A S 5 o C I A T E 5 <br /> E07213A <br /> Plate 2 <br />