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Nitrate Mass Balance Calculation: <br /> Advantex 75% Removal of Total Nitrogen (Nw = 19 mg/L-N) <br /> Data Input: <br /> Concentration Rain(N b); 1"00 mg/L-N <br /> Effluent Quantity(Q): 436 gaWday Denitrification(d): 5.0% <br /> I Effluent StreamN w')- 19 m <br /> ( g/L-N Deep Perc.of Rain(R): 5.01 in/yr <br /> Site Area(A): 14.0 Acres Waste Loading (W): 0.42 inlyr <br /> Result: <br /> Mass Balance(N j: 2.3 mglL-N <br /> MGL Drinking Water Nitrate as N: 10"0 mg/L-N <br /> Percent of MCL Nitrate as N 23% ; <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 f I ft (A) <br /> 0.42 inlyr(site) 1136 gal/day x(1 cu-ft/7.48 gals)x(365 daysi 1 year).x(1 acre 143,560-sq-ft)x(12 in l 1 R)x(1 site l 14 acres) <br /> NC= WN dl-d)+kN,, Nantzsche-Fennemore Equation Nc . <br /> W+R <br /> 2.31 mg/L-N=((0.42 in/yr x 19 mg/L-N x(1.-0.05))+(5.01 in/yr x'1 mg/L-N))/(0.42 inlyr+5.01 in/yr) <br /> Variables: <br /> Nc=Average nitrate-N concentration (mg/1)of combined effluent and rainfall percolate(2.31 mg/L-N). <br /> W= Uniform waste water loading for study area(in/yr)(0.42 inches/year)" <br /> Nw=Total nitrate-N concentration of waste water percolate(19 mg/L-N). <br /> d Fraction of nitrate-N loss due to denitrification in the soil(5%). <br /> R=Uniform deep percolation of rainfall(5.01 in/yr). <br /> Nb=Background nitrate-N concentration of,rainfall(1,mg/L-N). <br /> Assumptions: <br /> 1. Total nitrogen"concentration of waste stre*n based on estimate of 19 mg/L-N. <br /> 2. Fraction of nitrate-N loss due to denitrification in the soil is assumed to be 5%. <br /> 3. 'Estimated:deep percolation of rainfall is 5.011 in/yr, see deep percolation of rain worksheet. <br /> 4. Assume background nitrate-N concentration of rainfall is 1 mg/L-N. <br /> i <br /> NEIL O.ANDERSON&ASSOC.,INC. �r <br /> WO-MCHMCAL SMUCES•EMINEMN0 LMOFATMES E W <br /> - 22 Nous[enL0,Lnd1,CA 15216 d <br /> - (2051367.3781 <br /> Plate 4 <br />