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Nitrate Mass Balance Calculation <br /> Data Input* <br /> Effluent Quantity(Q): 4,050 gals/day Concentration Rain(Nr,): 1.00 mg/I.N <br /> Effluent Stream(N,): 58.00 mg/L-N Denitrillcatlon(d): 35.0% <br /> Site Area(A): 17.10 Aeras D Waste Loading(W): 3.18 in/Yr <br /> Result: <br /> Mass Ralance(N�): 14.E mg/1-N <br /> MCL Drinking Water Nitrate as N: 10,0 mg/L-N <br /> Percent of MCI.Nitrate as N 141% <br /> Equations: <br /> (W) in x 1 ft' x 36 a da Y x 1 acre x !%A x 1 <br /> yr day 7,48 gal 1 year 43,560 fly i ft (A)ACre <br /> J33� 3g'L3' IGca �� nys <br /> 3,18 InM-(site)=4,050 gal/day x(I cu-ft/7,48 gals)x(365 days/1 ywr)x(1 acre/43,560 5q-ft)x(12 In/1 R)x(1 sim 1.7.1 acres, <br /> moi,rv�y i5'7Cac:�f <br /> N,= WAI,,Il-d)+RN_ nnemo _Eo&jM= <br /> W+R <br /> 1,4,06 mg/L-N=((3.18 irl/yr x 58 mg/!_-N x(1-0.35))+(5.76 InI r x 1mg/Z-N))/(3.18 In/yr+5.76 in/yr) <br /> Variables- <br /> NC=Average nitrate-N concentration(mg/I)of combined effluent and rainfall percolate(14.06 mg/L-N). <br /> W=Uniform waste water loading for study area(in/yr)(3.18 Inches/year). <br /> mw=Total nitrate,N concentration of waste water percolate(58 mg/L-N). <br /> d=Fraction of nitrate-N loss due to denitrification in the soil(35%). <br /> R-Uniform deep percolation of rainfall(5.76 In/yr). <br /> Nb W Racltground nitrate-N concentration of rainfall(,I mg/L-N). <br /> Assunnptions; <br /> 1. Total nitrogen concentration of waste stream based on estimate of 58 mg/L N, <br /> 2. Fraction of nitrate-N loss due to denit-flcmtion in the toil is assumed to be 35%. <br /> 3. Estimated deep percolation of rainfall Is 5.76 in/yr,see deep percolation of rain worksheet. <br /> 4, Assume background nitrate-N concentration of rainfall is i mq/L-N. <br /> NEIL O. ANDERSON <br /> A N D A 5 5 O C 1 A T 5 <br /> Plate Z <br /> l <br />