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Nitrate Mass Balance Calculation <br /> Parcel 1 <br />{ Data Input <br /> Effluent Quantity(0): 490 gals/day Concentration Rain(Nj: 1.00 m_q&-N <br /> Effluent Stream{Nj: gg Op -N Denitrification(d): 35.0% <br /> Site Area(A); 2.01 Acres Deep pert. of Rain(R); 6.00In/yr <br /> Result: . <br /> Mass Balance 1 a.0 mgr/L--N Waste Loading(W): 3.28 in/yr <br /> MCL <br /> DrinkingWater Nitrate _ <br /> as N• <br /> . 90.0 mg/L'A! <br /> Percent of MCL Nitrate as N 110% <br /> Equations: <br /> (W) in = ((0) Of x x 365 day x 7_ac[e._.. x 12 in x Find NVJ <br /> yr day 7.48 gal 1 year 43,560 ftp 1 ft (A)acre <br /> 3.28 in/yr(site =4907 a1/da x 7 cu- 7 <br /> ) 9 Y ( fk/ .48 gals)x(365 days/1 year)x(1 sere/43,580 sq-ft)x(92 in/1{t)x(1 site/2.09 aCres) <br /> Ne= WN,,,(l-d)+RNb Hantzsche-F more uatlon NC,� <br /> W+R <br /> 70.98 mg/L-N=((3.28 in/yr x 45 mg/1,-N x(1-0.35)J+(fi In/yr x 9mg1L-N))/(3.28 Inlyr*Bin/yr) <br /> VaNables: <br /> Nc=Average nitrate-N concentration (mg/1)of combined eluent and rainfall percolate(10.98 mg/L-N). <br /> W=Uniform waste water loading for study area(in/yr)(3.28 inches/year). <br /> Nw=Total nitrate-N Concentration of waste water percolate(45 mg/L-N). <br /> d=Fraction of nitrate-N loss due to denitrification in the soil(35%). <br /> � Uniform deep percolation of rainfall(6 in/yr). <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 denitHfiication in the soil is assumed to be 35%, <br /> 3. Estimated deep percolation of rainfall is 6 in/yr,see deep percolation of rain worksheet, i <br /> 4. Assume background nitrate-N concentration of rainfall is 1 mg/L-N. <br /> NEIL 0. ANDERSON <br /> AND ASSOCIATES <br /> .. f <br /> I <br />