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i e <br /> Nitrate Mass Balance Calculation <br /> Parcel 4 <br /> Data Input: <br /> Effluent Quantity(Q): 420 gals/clay Concentration Rain(Nb): 7.00 mg/L-N <br /> Effluent Stream (NW): 45.00 mgt-N Denitri5cation(d); 35.0% <br /> Site Area (A): U6 Acres Deep Pere,of Rain(R): 6.00 inlyr <br /> Result: <br /> Mass Balance(Nj: 7.8 mg&-Ar Waste Loading(W): 1.91 iruyr <br /> MCL Drinking Water Nitrate as N: 10.0 mg1L-N <br /> Percent of MCL Nitrate as N 78% <br /> Equations: <br /> (W) fn = (Q) gal x -1.ft3 x 36"_$.day x 1 afire x 12 in x T Find <br /> yr day 7,48 gal 1 year 43,560 ft' 1 ft (A)acre <br /> 1.91 intyr(site)=420 gal/day x(1 cu-ff/7.48 gels)x(365 days/i year)x(1 acre/43,580 sq-ft)x(12 in/1 ff)x(7 site 12.96 acres) <br /> Nr= IN.�iIu.L1=d)+ftN. Hantzsc e-l�ennemgMEouetlon(Nc) <br /> W+R <br /> 7.81 rng/L-N=((1.91 inlyr x 45 MgIL-N x(10.35))*(6 inlyr x 1mg/L-N))/(1.91 in/yr+6 inlyr) <br /> Variables: <br /> No--Average nitrate-N concentration(mgH) of combined effluent and rainfall percolate(7.81 mg1l.-N). <br /> W-Unlform waste water loading for study area (in/yr)(1.91 inches/year). <br /> Nw="total nitrate-N concentration of waste water percolate(45 mg/L-N). <br /> d=f=raction of nitrate-N loss due to denitrification in the soil(35%). <br /> R=Uniform deep percolation of rainfall(6 inlyr). <br /> 0 <br /> Assumptions: <br /> 1. Total nitrogen concentration of waste stream based on estimate of 45 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 6 in/yr,see deep percolation of rain worksheet, <br /> 4. Assume background nitrate-N concentration of rainfall is 1 mg/L-N. <br /> NEIL O. ANDERSON <br /> AND ASSOC I AT E S <br /> i <br /> f <br /> i <br />