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Nitrate Mass Balance Calculation <br />Buddhist Temple <br />April New Year Event <br />Data Input: <br />Effluent Quantity (Q): 7 gals/day <br />Effluent Stream (N,,): 85.00 mg/L-N <br />Site Area (A): 4.60 Acres <br />Concentration Rain (Nb): 1.00 mg/L-N <br />Denitrification (d): 30.0% <br />Deep Perc. of Rain (R): 4.49 in/yr <br />Result: <br />Mass Balance (NO: 1.3 mg/L-N <br />MCL Drinking Water Nitrate as N: 10.0 mg/L-N <br />Percent of MCL Nitrate as N 13% <br />Waste Loading (W): 0.02 in/yr <br />Equations: <br />Find (W) <br />(W) in = (Q) gi x 1 ft3 x 365 day x 1 acre x 12 in x 1 <br />yr day 7.48 gal 1 year 43,560 ft2 1 ft (A) acre <br />0.02 in/yr (site) =7 gaUday 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 /4.6 acres) <br />Nc = WN (1-d)+RN6 <br />VV+R Hantzsche-Fennemore Equation (Nc) <br /> <br />1.26 mg/L-N = ((0.02 in/yr x 85 mg/L-N x (1-0.3))+(4.49 in/yr x 1mg/L-N))/(0.02 in/yr +4.49 in/yr) <br />Variables: <br />Nc = Average nitrate-N concentration (mg/I) of combined effluent and rainfall percolate (1.26 mg/L-N). <br />W = Uniform waste water loading for study area (in/yr) (0.02 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 (30%). <br />R = Uniform deep percolation of rainfall (4.49 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 85 mg/L-N. <br />Fraction of nitrate-N loss due to denitrification in the soil is assumed to be 30%. <br />Estimated deep percolation of rainfall is 4.49 in/yr, see deep percolation of rain worksheet. <br />Assume background nitrate-N concentration of rainfall is 1 mg/L-N. <br />lierracon