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f <br /> Fj <br /> Nitrate Mass Balance Calculation, 36 AC Parcel 1 <br /> ;. �. Data Input: <br /> Effluent Quantity(Q): 808 gals/day Concentration Rain (Nb): 1.00 mg/L-N <br /> Effluent Stream (Nj: 60.00 mg/L-N Denitrification(d): 15,0% <br /> Site Area (A): 36.00 Acres Deep Perc. of Rain (R): 3.30 in/yr <br /> Waste Loading (W). 0.30 in/yr <br /> FF Result: <br /> Mass Balance(Nj: 5.2 mg/L-N <br /> MCL Drinking Water Nitrate as N: 10.0 mg/L-N <br /> �� Percent of MCL Nitrate as N 52% <br /> Equations: <br /> (W) in = (Q) gal x 1 ft3 x 365 day x 1 acre x 12 in x 1 Find <br /> .-J yr day 7.48 gal 1 year 43,560 ft' 1 ft (A)acre <br /> ` 0.3 in/yr(site) =808 gal/day x(1 cu-ft/7.48 gals)x(365 days/1 year)x(1 acre/43,560 sq-ft)x(12 in/I ft)x(1 site/36 acres) <br /> ~# <br /> N,= WN (1-d)+RN,, Hantzsche-Fennemore E uation Nc <br /> W+R <br /> p + 5.19 mg/L-N=((0.3 irVyr x 60 mg/L-N x(1-0.15))+(3.3 in/yr x 1mg/L-N))/(0.3 in/yr+3.3 in/yr) <br /> t— Variables: <br /> P Nc=Average nitrate-N concentration(mg/1)of combined effluent and rainfall percolate(5.19 mg/L-N). <br /> W= Uniform waste water loading for study area (inlyr) (0.3 inches/year). <br /> Nw=Total nitrate-N concentration of waste water percolate(60 mg/L-N). <br /> i <br /> d = Fraction of nitrate-N loss due to denitrification in the soil (15%). <br /> w R= Uniform deep percolation of rainfall (3.3 in/yr). <br /> h. Nb= Background nitrate-N concentration of rainfall (1 mg/L-N). <br /> Assumptions: <br /> Fi 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 /> N + 4. Assume background nitrate-N concentration of rainfall is 1 mg/L-N. <br /> l � <br /> F <br /> P , <br /> NEIL O. ANDERSON <br /> l 4 <br /> AN D ASSOCIATES <br /> Plate 11 <br /> N ' <br />