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1� � <br /> Qtrate Mass Balance Calculation <br /> j Data Input: <br /> Effluent Quan Q): 446 gals/day Concentration Rain(Ne): 1.00 mg/L-N <br /> Effluent Stre (N�: -N Denitrification (d):-25.0% <br /> Site A ea (A): 79 0 re Deep Perc. of Rain R): 5.T6 in/yr <br /> r Waste Loading RV -OP08-m/yr <br /> Result: <br /> (f � Mass Balance(ANG): 1. g/ - <br /> MCL Drinking Water Nitrate as�fV-1.0 0-41L-N <br /> Percent of MCL Nitrate as N 16% <br /> Equations: <br /> (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 ftz 1 ft (A)acre <br /> 0.08 in/yr(site) =446 gal/day x (1 cu-ft/7.48 gals)x(365 days/9 year.)x(1 acre/43,560 sq-ft)x(12 in/1 ft)x(1 site/79 acres) <br /> N,= WN-(1-d)+RN,, Hantzsche-Fennemore Equation(Nct <br /> W+R <br /> 1.57 mg/L-N=((0.08 in/yr x 60 mg/L-N x.(1-0.25))+(5.76 in/yr x 1mg/L-N))/(0.08 in/yr+5.76 in/yr) <br /> f <br /> Variables: <br /> Nc=Average nitrate-N concentration(mg/1) of combined effluent and rainfall percolate(1.57 mg/L-N). <br /> W=Uniform waste water loading for study area(in/yr)(0.08 inches/year). <br /> Nw=Total nitrate-N concentration of waste water percolate(60 mg/L-N). <br /> d=Fraction of nitrate-N loss due to denitrification in the soil.(25%). <br /> R=Uniform deep percolation of rainfall (5.76 in/yr). <br /> 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 60 mg/L-N. <br /> 2. Fraction of nitrate-N loss due to denitrification in the soil is assumed to be 25%. <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 1 mg/L-N. <br /> 1�3 <br /> N El L O. AN D'E R S O N <br /> AN D A S S 0 C 3 A T .'E S <br /> Plate 10 <br />