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NitMte Mass Balance Calculation, Pard 1 <br /> Data Input: <br /> uent Quantity(Q): 608 gals/da ` Concentration Rain (Nb): 1.00 mg/L-N <br /> Effluent Stream (N,): 45.00 mg/L-NDenitrification (d): 15.0% <br /> Site Area (A): 5.07 Acres i Deep Perc. of Rain (R): 5.76 in/yr ' <br /> Waste Loading (W): 1.61 in/yr <br /> Result: `� <br /> Mass Balance(NJ- 1 mg&-N <br /> MCL Drinking Water Nitrate as N: 1 /L- <br /> Percent of MCL Nitrate as N 91% <br /> Equations: <br /> (W) in = (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 ftz 1 ft (A)acre <br /> 1.61 in/yr(site) =608 gal/day x(1 cu-ft/7.48 gals)x(365 days/1 year)x(1 acre 143,560 sq-ft)x(12 in/1 ft)x(1 site 15.07 acres) <br /> Nr= WN-(1-d)+RN,, Hantzsche-Fennemore Equation(Nc) <br /> O� %I W+R <br /> 9.15 mg/L-N=((1 61 in/yr x 45 mg/L-N x(1-0.15))+(5.76 in/yr x 1mg/L-N))/(1.61 in/yr+5.76 in/yr) <br /> Va.riablesz— <br /> Nc=Average nitrate-N concentration (mg/1)of combined effluent and rainfall percolate(9.15 mg/L-N). <br /> W= Uniform waste water loading for study area (in/yr) (1.61 inches/year). <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 (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 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 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 /> NEIL O. ANDERSON <br /> AN D ASSOCIATES <br /> f late 10 <br /> y <br />