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e <br /> Nitrate Mass Balance Calculation <br /> Data ZnpuC <br /> Effluent Quantity(Q): 4,050 gals/day Concentration Rain(N„ : 1.00 mg/l.-N <br /> Effluent Stream(NN,): 58.00 mg/L-N Denitrification(d): 35.0% <br /> Site Area(A): 17.10 Acres Deep Perc.of Rain(R): 5.76 irNyr <br /> Waste Loading(W): 3.18 in/yr i <br /> Result; <br /> Mass Balance(NG]: 14.1,rag/L-N <br /> MCL Drinking Water Nitrate as N: 10.0 mg/,L-N <br /> Percent of MCI.Nitrate as N 1410/a <br /> Equations: <br /> (W) in T (Q) ggj x 1 ft' x 36__5_d.BY x 1 acre x 12 In x 1 <br /> yr day 7.48 gal 1 year 43,560 f? 1 ft (A)acre <br /> ,-,33C 54 v • 6,�a07 <br /> 3,161ntyr(site)=4,050 gal/day x(1 cu-ft j 7.48 gals)x(365 days/1 year)x(1 acre-/43,560 sq-rt)x(12 In/1 ft)x(1 site/.17.1 acres, = �� <br /> I <br /> N�= WN 1•d+RN <br /> W+R <br /> 14.06 mg/L-N=((3.1B in/yr x 58 mg/!_-N x f1-0.35))+(5.76!n/yr x 1mg/L-N))/(3.18 Inlyr+5.76 in/yr) /fi 6ali a <br /> Variables: <br /> Nc=Average nitrate-N concentration(mg/I)of comWned eluent and rainfall percolate(14.06 mg/L-N). <br /> W= Uniform waste water loading for study area(In/yr)(3.18 Inches/year). <br /> Nw�TMI nit mte-N concentration of waste water percolate(58 mg/L-N). <br /> d Fraction of nitrate-N loss due to denit;riflration in the soil (35%). <br /> R Uniform deep percolation of rainfall(5.76 In/yr). <br /> Nb=background nitrate-N concentration of rainfall(1 mgfL-N). <br /> Assumptions, <br /> 1. Total nitrogen concentration of waste stream based on 45tlmat:2 of 58 mg/L-N. <br /> 2. Fraction of nitrate-N loss due to denitrlflcation in the soil is assumed to be 35%. <br /> 3. Estimated deep percolation of rainfall Is 5.75 in/yr,see deep percolation of rain worksheet. <br /> 4, Assume background nitrate-N concentration or rainfall is 1 mg/I.-N. <br /> ".44NEIL O. ANDERSON <br /> A N o A 5 S O C 1 A T E S <br /> Plate 2 2 <br />