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Nitrate Mass Balance Calculation . <br /> Data Input: <br /> Effluent Quantity(Q): 4,500 Gals Concentration Rain(Nb): 1-00 mg/L-N <br /> Effluent Stream(Nw): 10.00 mg/L-N Denitrification(d): 10% <br /> Waste Loading(W): 30.25 in/yr Deep Perc.of Rain(R): 7-28 in/yr <br /> Site Area(A): 2.0 acres <br /> Result: <br /> Mass Balance(Nc):.7.45 mg/C-N <br /> MCL Drinking Water Nitrate as N: 10-00 mg/L-N <br /> Percent of MCL Nitrate as N 0.74 mg/L-N <br /> Equations: <br /> (W) in = (Q) coal x 1 ft3 x 36� x 1 acre x 12 in x 1 Find <br /> yr day 7.48 gal 1 year 43,5601 1 ft (A)acre <br /> 30.25 in/yr(sifs) =4,500 gal/day x(1 cu-ft/7.48 gals)x(365 days/1 year)x(1 acre/43,560 sq-ft)x(12in/1 ft)x(1 site/2 acres) <br /> NG' WNw(1-d)+Rt\L Hantzsche-FLnnemore F nation Nc <br /> W+R <br /> 7.45 rriglL-N=((30.25 in/yr x 10 mg/L-N x(1-0.1))+(7.28 in/yr x 1mg1L-N))/{30.25 in/yr+7.28 in/ Find Nc <br /> Variables: <br /> Nc=Average nitrate-N concentration(mgA)of combined effluent and rainfall percolate(7.45 mg/L-N). <br /> W=Uniform waste water loading for study area(in/yr)(30.25 inches/year). <br /> Nw=Total nitrate-N concentration of waste water percolate(10 mg/L-N). <br /> d=Fraction of nitrate-N loss due to denitrification in the soil(10%). <br /> R w Uniform deep percolation of rainfall(7.28 in/yr). <br /> Nb=Background nitrate-N concentration of rainfall(1 mg/L-N). <br /> Assumptions: <br /> 1. Nitrate-N concentration of waste stream based on estimate of 10 mg/L-N. <br /> Assumption based on work from Hantzsche and Finnemore, 1992, <br /> 2. Fraction of nitrate-N loss due to denitrification in the soil is assumed to be 10%. <br /> Assumption based on work from Hantzsche and Finnemore, 1992. <br /> 3. Estimated deep percolation of rainfall is 7.28 in/yr,see deep percolation of rain worksheet. <br /> 4. Assume background nitrate-N concentration of rainfall is 1 mg/L-N based on range by <br /> Hantzsche and Fennemore, 1992. <br /> NEIL O.ANDERSON R ASSOC.,INC. ; <br /> _ 4E OlEp>NCAL SFR CWS-B INEEMG LMORAiomE$ Z { <br /> Y1 -au TJS G Gtr. <br /> '� Plate 2 <br />