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Nitrate-Mass Balance Calculation: <br /> Advantex 50% Removal of,Total Nitrogen.(Nw = 38 mg/L-N). <br /> Data Input: <br /> Concentration Rain (Nb): 1,00 mg/L-N. . <br /> Effluent Quantity(Q): 438 gals/day -Denitrification(d):,5.0% <br /> i.: Effluent Stream.(Nj: 38 mgk-N Deep Perc.of Rain (R): 5.01 in/yr <br /> Site Area(A); 14.0 Acres : Waste Loading (W): 0,42 in/yr <br /> Result <br /> Mass,Balance(N.]: 3.7 mg/L-N <br /> MCL Drinking Water Nitrate as K: 10.0 mg/_L-N ' <br /> Percent of MCL Nitrate as N '37%: <br /> Equations <br /> (W) in = (Q) . gal x 1 ft a x 365 dx . 1 acre: x 12 in -x 1 Find <br /> ay <br /> h. yr day 7.48 gal 1 year 43,560 ft' 1 ft (A) <br /> 0.42'in/yr(site)=436 gal/day x(1 cu-ft 1.7:48 gals)x(365 days/1 year)x(1 acre./43,560 sq-ft)x(12 in/1 ft)x(1 site/14-acres) <br /> N, WN„ 1-d +RN Hantzsche-Fennemore Equation Nc <br /> W+R <br /> 3.71 mg/L-N,=((0.42 in/yr x 36 mg/L-N x(1-0:05))+(5,01 in/yr x 1`mg/L-N))/(0.42 in/yr+5.01 in/yr) <br /> Variables: <br /> Nc=Average nitrate-N concentration`(mg/1).of combined effluent and rainfall percolate(3.71 mglL-N): <br /> W'..'Uniform waste water loading for study area(in'/Yr) (0.42 inches/year). <br /> Nw=Total nitrate-N concentration of wastewater percolate(38 mg/L-N): <br /> a d= Fraction of nitrate-N,loss due to-denit-dfication in the soil'(5%).. <br /> R"=Uniform deep percolation of rainfall(5.01 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,38 mgl -N. <br /> 2- Fraction sof nitrate-N loss due to.denitrification in the soil is assumed to be 5%. <br /> 3. Estimated deep.percolation of rainfall is 5.01 in/yr,see deep.percolation of rain worksheet. <br /> 4. Assume background nitrate-N concentration of rainfall is 1 mg/L-N. <br /> i <br /> 'NEIL 0.ANDERSON&ASSOC.,INC. D <br /> - r GEOTEcRNcAL SERVCES-ERGHMEERNG LABORATORIES <br /> - - - 22 Houston Ln.Lodi,CA.93240 O <br /> Plate 3 <br />