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Nitrate Mass Balance Gaicu)ation <br /> Data Input: <br /> Effluent Quantity(0): 14,830 gals/day Concentration Rain(ND): 1.00 mg/L-AI <br /> Effluent Stream (Na,): 45.17 mg/1--N Denitrification (d): 25.0% <br /> Site Area(A): 22.61 Acres Deep Perc. of Rain(R): 5.76 inlyr <br /> Result: <br /> Mass Balarce (N,),: 20.9 mg/L-N Waste Loading (W): 8.82 inlyr <br /> MCL Drinking Water Nitrate as N: 10.0 rnglL-N <br /> Percent of MCL Nitrate as N 209% <br /> Equations; <br /> (W) in = (Q) gal x 1 ft3 x 365 day x 1 acre x 12 in x 1 Find <br /> yr day 7.48 gal 1 year 43,560 ft' 1 ft (A)acre <br /> 8.82 inlyr(site) =14,830 gallday x (1 cu-ft 17.48 gals)x (365 days/1 year) x (1 acne/43,560 sq-ft)x(12 in/1 ft)x (1 site 122 61 acres) <br /> N.= Hantzsche-Fennemore Equation(Nc) <br /> 1N+R <br /> 20.89 mglL-N=((8.82 in/yr x 45.17 mglL-N x(1-0,25))+(5,76 inlyr x 1mg1L-N))/(8.82 inlyr+--5.76 inlyr) <br /> Variables: <br /> Nc=Average nitrate-N concentration(mg/l)of combined effluent and rainfall percolate(24.89 mg/L-N). <br /> W= Uniform waste water loading for study area (inlyr) (8.82 inches/year). <br /> Nw=Total nitrate-N concentration of waste water percolate(45.17 mg/L-N). <br /> d= Fraction of nitrate-N loss due to denitrifcation in the soil(25%). <br /> R-Uniform deep percolation of rainfall(5.76 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 45.17 mg/L-N. <br /> 2. Fraction of nitrate-N loss due to denitrification in the soil is assumed to be 25%. <br /> 3. Estimated deep percolation of rainfall Is 5.76 inlyr, see deep percolation of rain worksheet. <br /> 4. Assume background nitrate-N concentration of rainfall is 1 mg/L-N. <br /> "04 NEiL O. ANDERSON <br /> A rr D A 5 5 0 C I A T E S <br /> 'date 10 <br />