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Nitrate Mass Balance Calculation <br /> lj <br /> Data Input: <br /> i 4- <br /> Effluent Quantity(Q): 872 gals/day Concentration Rain (Ne): 1.00 mglL-N <br /> Effluent Stream(N,w): -85.00 mg/L-N Denitrification (d): 35.0% <br />` Site Area (A): 2.16 Acres Deep Perc. of Rain (R): 4.00 in/yr <br /> Waste Loading(W): 5.43 in/yr <br /> Result: <br /> M Mass Balance(N j: 32.2 mg/L-N <br /> MCL Drinking Water Nitrate as N: 10.0�ngIL-N <br /> Percent of MCL Nitrate as N 322% <br /> Ff_# Equations: <br /> (W) in = (Q) ga 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 ftz 1 ft (A)acre 23 0) <br /> 5.43 in/yr(site)`=�72 gal/day x(1 cu-ft/7.48 gals)x(365 days/1 year)x(1 acre 143,560 sq-ft)x(12 in/9 ft)x(1-site.12.1 ores,, <br /> v13� C �3 Hantzsche-Fennemore E uation(No <br /> N,= WN-(l-d)+RN,, <br /> W+R <br /> 32.23 mg/L-N=((5.43 in/yr x 85 mg/L-N x(1-0.35))+(4 in/yr x Img/L-N))/(5.43 in/yr+4 irdyr) <br /> Variables: <br /> No=Average nitrate-N concentration(mg/l)of combined effluent and rainfall percolate(32.23 mg/L-N). <br /> FI <br /> W= Uniform waste water loading for study area (in/yr)(5.43 incheslyear). <br /> Nw=Total nitrate-N concentration of waste water percolate(85 mg/L-N). <br /> d=Fraction of nitrate-N loss due to denitrification in the soil(35%). <br /> R= Uniform deep percolation of rainfall(4 in/yr). <br /> t Nb= Background nitrate-N concentration of rainfall (1 mg/L-N). <br /> Assumptions: <br /> 1. Total nitrogen concentration of waste stream based on estimate of 85 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 4 inlyr,see deep percolation of rain worksheet. <br /> 4. Assume background nitrate-N concentration of rainfall is 1 mg/L-N. <br /> F <br /> I <br /> ri <br /> a <br /> 4. <br /> sF1 NEIL O. ANDERSON <br /> A N 'D A S S O C I A T E S <br /> Plate 2 <br /> i { S <br />