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Nitrate Mass Balance Calculation, 21.4 AC Parcel 1 <br /> FData Input: <br /> Effluent Quantity(Q): 808 gals/day Concentration Rain (N,,): 1.00 mg/L-N <br /> F Effluent Stream (NH,): 60.00 mg/L-N Denitrification (d): 15.0% <br /> Site Area(A): 21.40 Acres Deep Perc. of Rain (R): 3.30 in/yr <br /> Waste Loading%0.51 in/yr <br /> R' Result: '- <br /> Mass Balance(N.): 7.7 mg/L-N <br /> MCL Drinking Water Nitrate as N: 10.0 mg/L-N <br /> Percent of MCL Nitrate as N 77% <br /> F <br /> Equations: <br /> (W} 'n = (Q) gal 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 ft' 1 ft (A)acre <br /> 0°51Dn�yr(site) =808 gal/day x(1 cu-ft 17.48 gals)x(365 days/1 year)x (i acre/43,560 sq-ft)x(12 in/1 ft)x(1 site/21.4 acres) <br /> F <br /> N,= WN-(1-d)+RNt, Hantzsche-Fennemore Equation (NO <br /> W+R <br /> �,6 mg/L-N ((0.51 in/yr x 60 mg1L-N x (1-0.15))+(3.3 in/yr x 1 mg1L-N))1(0.51 in/yr+3.3 in/yr) <br /> Vaiia les: <br /> Nc=Average nitrate-N concentration (mg/1)of combined effluent and rainfall percolate(7.67 mg/L-N). <br /> W= Uniform waste water loading for study area (in/yr) (0.51 inches/year). <br /> 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 (15%). <br /> R= Uniform deep percolation of rainfall (3.3 in/yr). <br /> Nb= Background nitrate-N concentration of rainfall (1 mg/L-N). <br /> II Assumptions: <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 15%. <br /> 3. Estimated deep percolation of rainfall is 3.3 in/yr, see deep percolation of rain worksheet. <br /> fi 4. Assume background nitrate-N concentration of rainfall is 1 mg/L-N. <br /> F, <br /> F <br /> i <br /> F! <br /> fJ <br /> NEIL O. ANDERSON <br /> A N D A S S 0 C ! A T E S <br /> Plate 10 <br /> 1 .' <br /> t <br />