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�4 <br /> Nitrate Mass Balance Calculation <br /> Data Input: <br /> Effluent Quantitq(A): <br /> 11 ay r oncentration Rain (Nb : /L-N <br /> Effluent Stream65.00 mg/L- Denitrification (d 35.0% <br /> *_ py�Site Are1.64 Acres Deep Perc. of Rain (R}: n/r <br /> Result: <br /> Mass Balance(N j: 9.9 mg/L-N <br /> MCL Drinking Water Nitrate as N: 10.0 mg/L-N Waste Loading (W : <br /> Percent of MCL Nitrate as N 99% <br /> Equations: <br /> (W) in = (Q) WI x x- x 365 d x 1 a[-Cr6l x 2 in x 1 Find <br /> 94 7.48'# 1 year 43,ft2 (A)/cre <br /> 0.9 in/y (site) =110 gal/day x'(1 cu-ft/7.48 gals)x(365 days/1 year)x(1 acre 143,560 sq-ff)x(12 in/1 ft)x(1 site/1.64 acres) <br /> iNc= WN,.,(1-d)+RN,, Hantzsche-Fennemore Equation(Nc) <br /> W+R <br /> 9.91 mg/L-N= ((0.9 in/yr x 65 mg/L-N x(1-0.35))+(3.27 in/yr x 1 mg/L-N))/(0.9 in/yr+3.27 in/yr) <br /> t Variables: <br /> Nc=Average nitrate-N concentration (mg/1)of combined effluent and rainfall percolate (9.91 mg/L-N). <br /> W= Uniform waste water loading for study area(in/yr) (0.9 inches/year). <br /> w-� Nw=Total nitrate-N concentration of waste water percolate(65 mg/L-N). <br /> d=Fraction of nitrate-N loss due to denitrification in the soil (35%). <br /> R=Uniform deep percolation of rainfall (3.27 in/yr). <br /> Nb= Background nitrate-N concentration of rainfall(1 mglL-N}. �41 <br /> Assumptions: <br /> 1. Total nitrogen concentration of waste stream based on estimate of 65 mg/L-N. <br /> 2. Fraction of nitrate-N loss due to denitrification in the soil is assumed to be 35%. <br /> 3. Estimated deep percolation of rainfall is 3.27 inlyr, see deep percolation of rain worksheet. <br /> 4. Assume background nitrate-N concentration of rainfall is 1 mg/L-N. <br /> s + <br /> I � <br /> "0004 NEIL O. ANDERSON <br /> AN D ASSOCIATES <br /> I Plate 1 <br /> it <br />