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Nitrate Mass Balance Calculation <br /> 266440, 8875, and 8925 Thornton Road <br /> Data Input: <br /> Effluent Quantity(Q): 6,089 gals/day Concentration Rain (Nb): 1.00mg/L-N <br /> Effluent Stream (N,): 85.00 mg/L-N Denitrification (d): 35.0% <br /> Site Area (A): 2.37Acres Deep Perc. of Rain (R): 5.76 in/yr <br /> Waste Loading (W): 34.54 in/yr <br /> Result: <br /> Mass Balance(N,): 47.5mg/L-N <br /> MCL Drinking Water Nitrate as N: 10.0 mg/L-N <br /> Percent of MCL Nitrate as N 475% <br /> Equations: <br /> (W) in = (Q) gal x 1 ft3 x 365 day x 1 acre x 12 in x 1 Find W <br /> yr day 7.48 gal 1 year 43,560 ft2 1 ft (A) acre <br /> 34.54 in/yr(site) =6,089 gal/day x(I cu-ft/7.48 gals)x(365 days/I year)x(1 acre/43,560 sq-ft)x(12 in/i ft)x r1 site/2.37 acres <br /> N,= WN 1-d +RNb Hantzsche-Fennemore Equation(Nc) <br /> W+R <br /> 47.5 mg/L-N=((34.54 in/yr x 85 mg/L-N x(1-0.35))+(5.76 in/yr x 1mg/L-N))/(34.54 in/yr+5.76 in/yr) <br /> Variables: <br /> Nc = Average nitrate-N concentration (mg/1) of combined effluent and rainfall percolate (47.5 mg/L-N). <br /> W = Uniform waste water loading for study area (in/yr) (34.54 inches/year). <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 (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 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 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 /> pe,ralogix <br /> . .. <br /> Plate 7 <br />