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Worksheet No_ 2 <br /> Nitrate Mass Balance Calculation <br /> of Effluent <br /> Data Input: <br /> Site Area (A): 1.75 Acres <br /> Effluent Quantity (Q):330 gals/day Concentration Rain Qb): 0.17 mg/L-N <br /> Effluent Stream (N): 48.20 mglL-N Denitrification (d):25.0% <br /> Waste Loading (VII):2.53 inlyr Deep Perc. of Rain (R):7.86 in <br /> `r Result= <br /> �- Mass Balance (k): 8.94 mg/L-N <br /> MCLDrinking Water: 10.0 mg/L-N <br /> ` Percent of MCL:89% <br /> Equations: <br /> (W) -in = (Q) gal x 1 fig x 365 day x 1 acre x '12 in x 1 <br /> yr day 7.48 gal 1 year 43,566 ft 1 ft (A) <br /> NG= WNdl-d)+RNe <br /> W+R I <br /> Variables: <br /> Nc= Average nitrate-N.concentration (mg/1) of combined effluent and rainfall percolate (8.94 mg/L-N). <br /> W= Uniform waste water loading for study area (in/yr) <br /> W is 150 gallons per day on a 1.75 acre site (2.53 in/yr). <br /> Nw= Total nitrate-N concentration of waste water percolate (48.2 mg/L-N). <br /> d =Fraction of nitrate-N loss due to denitrification in the soil (25%). <br /> R=Uniform deep percolation of rainfall (7.86 in/yr). <br /> Nb= Background nitrate-N concentration of rainfall (0.17 mg/L-N). i <br /> i <br /> Assumptions: <br /> 1. Nitrate-N concentration of waste stream based on estimate of 48.2 mg/L-N. <br /> F Assumption based on work from Hantzsche and Finnemore, 1991_ <br /> L. <br /> 2. Fraction of nitrate-N loss due to Denitrification in the soil is assumed to be 25%. <br /> 4 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 mg/L-N based on range by <br /> Hantzsche and Fennemore, 1991. <br /> r VERs y , <br /> NEIL O.ANDERSON&ASSOC.,INC. N <br /> GEOTECHUCAL SOMCES-EMMEBMG LMONKTO"MZ <br /> 22 H-1-L-U-*.GA 9SM O R <br /> Rouyx�9m Ids O`�P <br /> PLATE 10 <br /> k-: <br />