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Nitrate Mass Balance Calculation <br /> F, <br /> FData Input: <br />` Effluent Quantity(Q): 841 gals/day Concentration Rain (NO): 1.00 mg/L-N <br /> f � Effluent Stream (N,K): 60.00 mg/L-N Denitrification (d): 10.0% <br /> Site Area (A): 14.32 Acres Deep Perc. of Rain (R): 11.68 in/yr �� 4 <br /> art' <br /> Result: 51 <br /> FMass Balance(N,. 4.4 mg/L-N IJ,4 <br /> MCL Drinking Water Nitrate as N: 10.0 mg/L-N t)� yWaste Loading (W): 0.79 in/yr °C t <br /> Percent of MCL Nitrate as N 44% <br /> 0. <br /> F <br /> Equations: <br /> 4WW 2- <br /> I (W) in = (Q) gal x 1 fta x 365 day x 1 {acre x 12 in x 1 Find r <br /> E yr day 7.48 gal 1 year 43,560 ft2 1 ft (A)acre <br /> 0.79 in/yr(site) =841 gal/day x(1 cu-ft/7.48 gals)x(365 days/1 year)x(1 acre/43,560 sq-ft)x(12 in/1 ft)x(1 site/14.32 acres) <br /> h F N,= WN-(1-d)+RN,, Hantzsche-Fennemore Equation(Nd <br /> W+R <br /> 4.36 mg/L-N=((0.79 in/yr x 60 mg/L-N x(1-0.1))+(11.68 in/yr x 1mg/L-N))/(0.79 in/yr+11.68 in/yr) <br /> Variables: <br /> Nc=Average nitrate-N concentration (mg/1)of combined effluent and rainfall percolate (4.36 mg/L-N). 1 4 ' <br /> W=Uniform waste water loading for study area(in/yr) (0.79 inches/year). <br /> k 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(10%). 0 H G <br /> R=Uniform deep percolation of rainfall (11.68 in/yr). c.. <br /> Nb=Background nitrate-N concentration of rainfall(1 mg/L-N). _ - <br /> Assumptions: fl <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 10%. <br /> 3. Estimated deep percolation of rainfall is 11.68 in/yr, see deep percolation of rain worksheet. <br /> F4. Assume background nitrate-N concentration of rainfall is 1 mg/L-N. <br /> �{ tr <br /> NEIL O. ANDERSON <br /> A N D A S S O C I A T E S <br /> F; <br /> Plate 11 <br /> F'� <br />