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PnQ,0@W a,ld aesbngstpbcsYstt:irm-Oat Fa <br /> Data Input: <br /> Effluent Quantity in GPD(Q): 782 Gal/Day <br /> Effluent Stream in mg/L-N (N„): 65.6 mg/L-N <br /> Site Area in Acres(A): 31 Acres <br /> Concentrawon in Rain in mg/L-N (NJ : 1 mg/L-N <br /> Denitrification in percent(d): 25 % <br /> Deep Perc.Of Rain in mches/yr(R): 7.85 Inlyr <br /> Calculations: <br /> Wi=Q x Cu-Ft/Gal x(Days/Yr)x (Sq-Ft/Acre x Inches/Ft) x(1/A) <br /> Wi=782 x (1/7.48) x 365 x(1/43560)x 12 x (1/31) =0.339 <br /> N�=Wi*N (1-d)+RN <br /> Wi+R <br /> N�=0.339'65.6(1-0.25)+(7.8511) =2.99 <br /> 0.339+7.85 <br /> Result: <br /> Uniform waste water loading(Wi) 0.34 Inches/Y, <br /> Mass Balance in mg/L-N (NJ: 3.00 mg/L-N <br /> Total Nitrate Mass 117 lbs <br /> MCL Drinking Water N as N: 10 mg/L-N <br /> Perecnt of MCL Nitrate as N <br /> Variables: <br /> N,=Average nitrate-N concentration(mg/L)of combined effluent and rainfall percolate <br /> WI =Uniform waste water loading for study area(m/year) <br /> Nw=Taal nitrate-N concentration of waste water percolate(mg/L-N) <br /> d=Fraction of mtrate-N loss due to denitrification in the soil N <br /> R=Uniform deep percolation of rainfall (inches/yr) <br /> Nb=Background nitrate-N concentration of rainfall (mg/L-N) <br /> Assumptions: <br /> Res.Effluent Stream in mg/L-N (N,): 44 mg/L-N <br /> Concentrauion.n Rain in mg/L-N (NJ : 1 mg/L-N <br /> Denitrification in percent(d): 25 % <br />