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S I <br /> 1 <br /> Nitrate Mass Balance Calculation <br /> Designated Remainder <br /> Da"Input <br /> } Effluent Quantity(Q); 490 galVday Concentration <br /> Effluent Stream N Rain(Nn); 7.00 mg/L.N <br /> vu),, 4500 mgIL_N Denitrification(d); 350% <br /> Site Area(A); 5,00Acres Deep Perc. of Rain(R); 6.00 in/yr <br /> Result: <br /> Mass Balance(N,): 8'.9 mgrL N Waite Loading MCL Drinking Water Nitrate as N; 10,0�_N g(ft 1.32 rrVyr <br /> Percent of MCL Nitrate as N 61% <br /> fEquations: <br /> (Q) gal x ,IJ2 x 38_5 day x IM Ilk x I Pintf <br /> Yr day 7.48 gal 1 year 43,560 fl2 1 ft (A)acre <br /> 1.32!n/yr($+te)=490 ga1/day x(1 cu-ft/7.48 gals)x(365 days/7 year)x(1 acm 143,560 sq-ft)x(12 In/1 ft)x(pacres) <br /> I <br /> N0` W+R # N HA sChe-Fennemore Eauahon fNcl <br /> i <br /> 6.09 mgdL-ld=((1.32 r'n/yr x 45 mg/L-N x(1-0.35))+(6 lnlyr x 1mg1L.•N))/(1.32 rn/yr+6 in/yr) <br /> variables: <br /> Nc=Average nitrate-N concentration (mg/l}of combined effluent and rainfall percolate (6,09 mg/L-N), <br /> W=Uniform waste water loading for study area(inlyr)(1,32 inches/year), <br /> Nw Total nitrate-N concentration of waste water percolate(45 mg/L-N). <br /> d�FraCtion of nitrate-N loss due t0 denitrification in the soil(35%), <br /> R=Uniform deep percolation of rainfall(6 in/yr). <br /> 0 <br /> ,Assumptions: <br /> 1. Total nitrogen concentration of waste stream based on estimate of 45 mg/L-N. <br /> 2. Fraction of nitrate•N loss due to denitriflcation in the sail is assumed to be 359'x, <br /> 3. Estimated deep percolation of rainfall is 6 In/yr, see deep percciation of rain worksheet_ <br /> 4. Assume background nitrate-N concentration of rainfall is I rng/L-N, <br /> I <br /> j <br /> NEIL 0. ANDERSQN <br /> oAOA N d A S 5 0 C i A 7 E $ <br /> i <br /> i. <br /> I <br />