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Nitrate Mass Balance Calculation <br />1246 N Fine Road, Linden <br />Data Input: <br />Result: <br />Effluent Quantity (Q): 450 gals/day <br />Effluent Stream (N„,,): 35.00 mg/L-N <br />Site Area (A): 2.00 Acres <br />Concentration Rain (N b): 1.00 mg/L-N <br />Denitrification (d): 25.0% <br />Deep Perc. of Rain (R): 3.21 in/yr <br />Waste Loading (W): 3.02 in/yr <br />Mass Balance (NO: 13.2 mg/L-N <br />MCL Drinking Water Nitrate as N: 10.0 mg/L-N <br />Percent of MCL Nitrate as N 132% <br />Equations: <br />(W) in = (Q) gpJ x 1 ft3 x 365 day x 1 acre x 12 in <br />yr day 7.48 gal 1 year 43,560 ft2 1 ft <br />x 1 <br />(A) acre <br />Find (W) <br />3.02 in/yr (site) =450 gal/day x (1 cu-ft/ 7.48 gals) x (365 days/1 year) x (I acre / 43,560 sq-ft) x (12 in / 1 ft) x (1 site / 2 acres) <br />N c = WN,„(1-d)+RN b <br /> HanIzsche-Fennemore Equation (Nc) <br />W+R <br />13.25 mg/L-N = ((3.02 in/yr x 35 mg/L-N x (1-0.25))+(3.21 in/yr x lmg/L-N))/(3.02 in/yr +3.21 in/yr) <br />Variables: <br />Nc = Average nitrate-N concentration (mg/I) of combined effluent and rainfall percolate (13.25 mg/L-N). <br />W = Uniform waste water loading for study area (in/yr) (3.02 inches/year). <br />Nw = Total nitrate-N concentration of waste water percolate (35 nrig/L-N). <br />d = Fraction of nitrate-N loss due to denitrification in the soil (25%). <br />R = Uniform deep percolation of rainfall (3.21 in/yr). <br />Nb = Background nitrate-N concentration of rainfall (1 mg/L-N). <br />Assumptions: <br />Total nitrogen concentration of waste stream based on estimate of 35 mg/L-N. <br />Fraction of nitrate-N loss due to denitrification in the soil is assumed to be 25%. <br />Estimated deep percolation of rainfall is 3.21 in/yr, see deep percolation of rain worksheet. <br />Assume background nitrate-N concentration of rainfall is 1 nrig/L-N. <br />petra log ix <br />geophr,tc environmental geology <br />Plate 9