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i <br /> Titrate Mass Balance Calculation <br /> Parcel 18 <br /> I <br /> Data Input: <br /> r <br /> Effluent Quantity(Q): 630 gaWday Concentration Rain (Nb): 1.00 mg/L-N <br /> Effluent Stream (N,N): 45.00 mg/L-N Denitrification (d): 15.0% <br /> Site Area(A): 9.81 Acres Deep Perc. of Rain (R): 3.54 in/yr <br /> Waste Loading (W): 0.86 in/yr <br /> Result: <br /> Mass Balance(N,): 8.3 mg/L-N <br /> - MCL Drinking Water Nitrate as N: 10.0 mg/L-N <br /> Percent of MCL Nitrate as N 83% <br /> Equations: <br /> (W) in = (Q) gal x 1 ft3 x 365 day x 1 acre x 12 in x 1 Find j <br /> yr day 7.48 gal 1 year 43,560 ftz 1 ft (A) acre <br /> 0.86 in/yr(site)=630 gal/day x(i cu-ft/7.48 gats)x(365 days/1 year)x(1 acre 143,560 sq-R)x(12 in/1 ft)x(1 site 19.81 acres) <br /> Hantzsche-Fennemore Equation(Nc) <br /> W+R <br /> 8.3 mg/L-N=((0.86 in/yr x 45 mg/L-N x(1-0.15))+(3.54 in/yr x 1 mg/L-N))/(0.86 in/yr+3.54 in/yr) <br /> Variables: <br /> �l 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 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 (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 /> Fr! <br /> Fjl' <br /> i <br /> P <br /> F <br /> 1 <br /> NEIL O. ANDERSON <br /> ANDOAO ASSOC IATES <br /> t�l <br /> Plate 20 <br /> t i <br /> ,` I <br />