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f <br /> Nitrate Mass Balance- ce Calculation. <br /> Advanteic;50%o Removal of Total Nitrogen (NW 38 mg/L-N) <br /> Data Input- <br /> Co centration Rain ( b): <br /> 1.0 <br /> 0 mg/L_ <br /> N' <br /> Effluent Quantify Q}: 436 ga!slday Denitrifc i <br /> ( } . <br /> f Effluent Stream(N,N): 38 mg/L-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 N 0.0-mg&-N , <br /> Percent of MGL N itrate as N'37%1 <br /> Equations: <br /> (W) in = .(0.) gal x 1 ft3 x 365 day x nacre x 12 in x 1 Find <br /> yr I day 7.48 qal 1 year 43,560 ft2 1 ft (A) <br /> 0.42 in/yr(site) =436 ga!/dayx(I-cu-ft/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 Hanfzsche-Fennemore Equation Nc <br /> W+R-­ <br /> 3.71 mg/L-N=(.(0.42 in/yr x 38 nig/L-N`x(1-0.05))+(5.01 in/yr x 1mg/L-N))/(0.42 in/yr+5.01 in/yr) <br /> Variables: , <br /> Nd=Average nitrate-N'concentratian (mgll)of combined effluent and'rainfall percolate(3.71 mg/L--N)'. <br /> W-Uniform waste water loading for study area(in/yr) (0.42 inches/year). <br /> . <br /> Nw=Total nitrate-N concentration of waste water percolate(38 mg/L-N). <br /> ' d�= Fraction of nitrate-N[loss due to denitrification in the soil(5%). <br /> -.R=.Uniform deep percolation of rainfall (5.01 inlyr). <br /> Nb=.Background nitrate-N concentration of rainfall(1 mg/L-N): <br /> If Assumptions: <br /> 1. Total nitrogen concentration of waste stream-based on estimat t'AA mgIL N� Zc�r $� <br /> 2. Fraction of 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 /> NEIL O.ANDERSON&AS SOC.,INC. <br /> C>QTECHMN AL SERI CES-EN INEERNO L ORATOItl ES <br /> - - u.ou <br /> - i[OhLO.LeCI,C:A 9520 O � <br /> d <br /> Piate 3 <br />