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1 <br /> ' Nitrate Mass Balance Calculation <br /> Data Input: <br /> Effluent Quantity(Q): 21.43 gals/day Concentration Rain(ND): 1.00 mg/L-N <br /> t Effluent Stream(Nw): 85.00 mg/L-N Denitriflca5on(d): 25.0% <br /> Site Area(A)7 7.37 Acres I Dee Perc,of Rain R: 2.47 irdyr <br /> Waste Loading(W):10.04 inlyr <br /> ' Result: <br /> Mass Balance(Nj: 2.0 mg/L-N <br /> MCL Drinking Water Nitrate as N: 10.0 mgt-N Waste Loading(W): 0.04 irVyr <br /> Percent of MCL Nitrate as N 20% <br /> Equations: <br /> (W) in = (Q) gal x 1 ft3 x 365 day x 1 acre x 12 in x 1 Find W <br /> yr day 7.48 gal 1 year 43,560 ft2 1-ft- (A)acre <br /> 0.04 in/yr(site)=21 gal/day x(1 cu-ft/7.48 gals)x(365 days/1 year)x(1 acre/43,560 sq-R)x(12 in/1 R)x(1 site/7.37 acres) <br /> No= W N 1-d+RN_ Hantzsche-Fennemore Equation(NO <br /> W+R <br /> ' 1.98 mg/L-N=((0.04 in/yr x 85 mg/L-N x(1-0.25))+(2.47 in/yr x 1 mg/L-N))/(0.04 ir✓yr+2.47 in/yr) <br /> Variables: <br /> Nc=Average nitrate-N concentration(mo)of combined effluent and rainfall percolate(1.98 mg/L-N). <br /> ' W=Un'rform waste water loading for study area(in/yr)(0.04 inches/year). <br /> Nw=Total ndrate-N concentration of waste water percolate(85 mg/L-N). <br /> d=Fraction of nitrate-N loss due to denitrification in the soil(25%). <br /> R=Uniform deep percolation of rainfall(2.47 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 85 mg/L-N. <br /> ' 2. Fraction of nitrate-N loss due to denitrfication in the soil is assumed to be 25%. <br /> 3. Estimated deep percolation of rainfall is 2.47 inlyr,see deep percolation of rain worksheet. <br /> 4. Assume background nitrate-N concentration of rainfall is 1 mg[L-N. <br /> ' F'.j.d Mana9 <br /> R <br /> Plate <br /> lrerraconNitrate Loading Calculation Sunrise Trucking8 <br /> 9oY Intlustrial way 866 Roth RoadLod],CA 96MO Lathrop,CA <br />