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�f :E <br /> Nitrate Mass Balance galculation <br /> " Parcel No. 1, 8.4 Acres <br /> 1 <br /> Data Input: <br /> Site Area (A): 8.4 Acres h <br /> Effluent Quantity (Q): 250 galslday Concentration Rain (Ne): 0.17 mg/L-N <br /> Effluent Stream ft): 45.00 mg(L-N Denitrification (d): 25.0% <br /> t Waste Loading (W): 0.40 in/yr Deep Perc. of Rain (R): 7.86 in <br /> Result: <br /> !3 ' <br /> Mass Balance (N j: 1.80 mg/L-N <br /> MCLDrinking Water: 10. mg/L-N ' <br /> Percent of MCL: 18% <br /> Equations: <br /> E (W) in = (Q) gal x 1 ft, x 365 day x i�1 acre x 12 in x 1 <br /> yr day 7.48 gal 1 year 43,560 ft 1 ft (A) acres <br /> E N,= WNw(1-d)+RNh <br /> W+R <br /> Variables: <br /> Ne=Average nitrate-N concentration (mgll) of combined effluent and rainfall percolate (1.8 mg/L-N). . <br /> W= Uniform waste water loading for study area (n/yr) <br /> W is 150 gallons per day on a 8.4 acre site (0.4 in/yr). <br /> I 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 (25%). <br /> E R= Uniform deep percolation of rainfall (7.86 in/yr). <br /> Nb= Background nitrate-N concentration of rainfall (0.17 mg/C N). <br /> Assumptions: <br /> !i <br /> F 1. Nitrate-N concentration of waste stream based on estimate of 45 mg/L-N. <br /> it Assumption based on work from Hantzsche and Finnemore, 1991. <br /> 2. Fraction of nitrate-N loss due to Denitrification in the soil is'assumed to be 25%. <br /> M Assumption based on work from Hantzsche and Finnemore, 1991. <br /> 3. Estimated deep percolation of rainfall is 7.86 in/yr, see Worksheet No. 1. <br /> ,. 4. Assume background nitrate-N concentration of rainfall is 0.17 ng/L-N based on range by <br /> �- Hantzsche and Fennemore, 1991. <br /> �°ipso <br /> NEIL O.ANDERSON&ASSOC.,INC. > <br /> fEGTEGtNCALSERVILES-Eh0HEMNG L400RATOMES Z <br /> 71 H—tm Ln.LM.CA Sao O <br /> �zao�x7srtn �SSgG�t• <br /> PLATE 9 <br />