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Nitrate Loading Calculation <br /> Data'Input: <br /> C�IiC <br /> Effluent Quantity(Q): 1,518 gals/day Concentration Rain (Nb); 1.00 mg/L-N <br /> Effluent Stream(N,)'. 60.00 mg/L-N f/ Denitrification (d): 25.0% <br /> ZNitra <br /> 7149%. <br /> cres Deep Perc. of Rain(R): 5.76 in r <br /> Result: <br /> MaL-N <br /> I <br /> MCL Drinking /L-N Waste Loading (W): 0.06 in/yr I <br /> Percent of <br /> i <br /> Equations: <br /> E <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 z 1 ft (A)acre <br /> 0.06 fn/yr(site) =1,518 gal/day x(1 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/363.66 acres) j <br /> N,= WN 1-d +RN Hantzsche-Fennemore E uatian Nc <br /> W+R <br /> 1.42 mg/ -N=((0.06 in/yr x 60 mg/L-N x(1-0.25))+(5.76 in/yr x 1 mg/L-N))1(0.061n/yr+5.76 in/yr) <br /> Variables: j <br /> 1 <br /> Nc=Average nitrate-N concentration (mg/1)of combined effluent and rainfall percolate (1.42 mg/L-N). <br /> W= Uniform waste water loading for study area(in/yr)(0.06 inches/year). <br /> Nw=;Total nitrate-N concentration of waste water percolate (60 mg/L-N). <br /> d =Fraction of nitrate-N loss due to denitrification 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). �I <br /> Assumptions: i <br /> t. 1. Total nitrogen concentration of waste stream based on estimate of 60 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 in/yr, see deep percolation of rain worksheet. <br /> 4. Assume background nitrate-N concentration of rainfall is 1 mg/L-N, j <br /> i. <br /> i <br /> I <br /> r+ <br /> NEIL O. ANDERSON <br />_ 4 <br /> AND ASS O C i A T L S <br /> Plate 10 <br />_f � <br />