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r Nitrate Mass Balance Calculation <br /> Parcel 3 <br /> i <br /> ii <br /> f 1 Data Input: <br /> E.? <br /> Effluent Quantity(Q): 350 gals/day Concentration Rain (Ne): 1.00 mg/L-N <br /> Effluent Stream(Nv,): 45.00 mg/L-N Denitrification (d): 35.0% <br /> !r <br /> Site Area(A): 2.00 Acres Deep Perc. of Rain (R): 6.00 in/yr <br /> ,i <br /> Result: <br /> Mass Balance(Nj: 9.0 mg/L-N Waste Loading (W): 2.35 in/yr <br /> MCL Drinking Water Nitrate as N: 10.0 mg/L-N <br /> r Percent of MCL Nitrate as N 90% <br /> . � it <br /> Equations: <br /> (W) in = (Q) gal x i< 1 ft3 x 36_ 5 day x 1 acre x 12 in x 1 Find <br /> _ yr day i;7.48 gal 1 year 43,560 ft2 1 ft (A)acre <br /> 2.35 in/yr(site) =350 gal/day x(1 cu-ft/7.48 gals)x(365 days/1 year)x(1 acre 143,560 sq-ff)x(12 in/1 ft)x(1 site/2 acres) <br /> k <br /> N, WN1-d +RN <br /> Nantzsche-Fennemore E uation (Nd <br /> _ = <br /> W+R <br /> 8.96 mg/L-N=((2.35 in/yr x 45 mg/L-N x(1-0.35))+(6 in/yr x 1mg/L-N))/(2.35 inlyr+6 in/yr) <br /> Variables: <br /> Nc=Average nitrate-N concentration (mgll) of combined effluent and rainfall percolate (8.96 mg/L-N). <br /> r r W=Uniform waste water loading for study area(in/yr) (2.35 inches/year). <br /> Nw=Total nitrate-N concentration of waste water percolate (45 mg/L-N). <br /> d = Fraction of nitrate-N',loss due to denitrification in the soil (35%). <br /> I R= Uniform deep percolation of rainfall (6 in/yr). <br /> =' 0 <br /> I <br /> --t. Assumptions: <br /> 1. Total nitrogen concentration of waste stream based on estimate of 45 mg/L-N. <br /> 2. Fraction of nitrate-Nil 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 /> i <br /> r �Y <br /> I! <br /> Li- <br /> } <br /> i <br /> f <br /> Fi <br /> ' f <br /> NEIL O. ANDERSON <br /> e <br /> AN D ASSOC I A T E S - <br /> r . <br /> "r li <br />