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1 <br /> 1 Nitrate Mass Balance Calculation <br /> 25288 N Cherokee Lane, Galt <br /> 1 <br /> Data Input: <br /> 1 Effluent Quantity(Q): 420 gals/day Concentration Rain(Nb): 1.00 mg/L-N <br /> Effluent Stream(NV,): 35.00 mg/L-N Denitrification(d): 35.0% <br /> Site Area(A): 1.84 Acres Deep Perc.of Rain(R): 5.29 in/yr <br /> 1 Waste Loading(W): 3.07 in/yr <br /> Result: <br /> Mass Balance(Nj: 9.0 mg/L-N <br /> MCL Drinking Water Nitrate as N: 10.0 mg/L-N <br /> 1 Percent of MCL Nitrate as N 90% <br /> Equations: <br /> 1 (W) in = (Q) gal x 1 ft3 x 365 day x 1 acre x 12 in x 1 Find <br /> yr day 7.48 gal 1 year 43,560 ft2 1 ft (A)acre <br /> 1 3.07 in/yr(site)=420 gaUday x(1 cu-ft/7.46 gals)x(365 days/1 year)x(1 acre/43,560 sq-ft)x(12 in/1 R)x(I site/1.84 acres) <br /> N - WNvS_1-d +RN� Hanbsche-Fennemore Eauation(Nc) <br /> _)_ <br /> W+R <br /> 1 8.98 mg/L-N=((3.07 in/yr x 35 mg/L-N x(1-0.35))+(5.19 in/yr x 1mg/L-N))/(3.07 in/yr+5.29 in/yr) <br /> Variables: <br /> 1 Nc=Average nitrate-N concentration(mg/1)of combined effluent and rainfall percolate(8.98 mg/L-N). <br /> W= Uniform waste water loading for study area(in/yr)(3.07 inches/year). <br /> Nw=Total nitrate-N concentration of waste water percolate(35 mg/L-N). <br /> d = Fraction of nitrate-N loss due to denitrification in the soil(35%). <br /> 1 R= Uniform deep percolation of rainfall (5.29 in/yr). <br /> Nb= Background nitrate-N concentration of rainfall(1 mg/L-N). <br /> Assumptions: <br /> 1 1. Total nitrogen concentration of waste stream based on estimate of 35 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 5.29 in/yr,see deep percolation of rain worksheet. <br /> 4. Assume background nitrate-N concentration of rainfall is 1 mg/L-N. <br /> 1 <br /> 1 <br /> 1 <br /> 1 <br /> qpetralogix <br /> 1 <br /> Plate 8 <br /> 1 <br />