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itrate Mass Balance Calculation <br /> Parcel S <br /> Data Input:. <br /> Effluent Quantity(Q): 630 galslday Concentration Rain (Nb): 1.00 mg/L-N <br /> Effluent Stream (N,H): 45.00 mg/L-N Denitrification (d): 15.0% <br /> Site Area (A): 9.81 Acres Deep Perc. of Rain (R): 3.54 inlyr <br /> Waste Loading (W): 0.86 in/yr <br /> Result: <br /> r Mass Balance(N j: 8.3 mg/L-N <br /> MCL Drinking Water Nitrate as N: 10.0 mg1L-N <br /> Percent of MCL Nitrate as N 83% <br /> t^. <br /> Equations: <br /> i_ (W) in = (Q) coal 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 ft2 1 ft (A) acre <br /> 0.86 inlyr(site) =630 gailday x(1 cu-ft 17.48 gals)x(365 days/1 year)x(9 acre 143,560 sq-ft)x(12 in/1 ft)x(1 site/9.81 acres) <br /> N,= WN (1-d)+RNb Hantzsche-Fennemore Equation(Nc) <br /> W+R <br /> 8.3 mg/L-N=((0.86 inlyr x 45 mg1L-N x(1-0.15))+(3.54 inlyr x 1mg1L-N))/(0.86 inlyr+3.54 inlyr) <br /> Variables: <br /> Nc=Average nitrate-N concentration (mg/1)of combined effluent and rainfall percolate(8.3 mg/L-N). <br /> W=Uniform waste water loading for study area (in/yr) (0.86 incheslyear). <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 (15%). <br /> R= Uniform deep percolation of rainfall(3.54 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 45 mg/L-N. <br /> ! 2. Fraction of nitrate-N loss due to denitrification in the soil is assumed to be 15%. <br /> 3. Estimated deep percolation of rainfall is 3.54 in/yr, see deep percolation of rain worksheet. <br /> 4. Assume background nitrate-N concentration of rainfall is 1 mg/L-N. <br /> G , <br /> NEIL O. ANDERSON <br /> AN D ASSOCIATES <br /> Plate 10 <br />