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Nitrate Mass Balance Calculation <br /> Data Input: <br /> - Waste Loading(1N); 1.02 ir✓yr <br /> Site Area W. 17.15 Ape <br /> Effluent Quantity(Q): 1301 Gals Concentration Rain(Nb): 0.17 mg2-N <br /> Emuent Stream(Nw): 45.00 mg/L-N Denitdfication(d): 10% <br /> Deep Perc.of Rain(R): 6.84 inches <br /> Result: <br /> Mass Balance(Nc): 5.40 mg(L-N <br /> MCL Drinking Water Nitrate as N: 10.00 mg(L-N <br /> Percent of MCL Nitrate as N 54 <br /> Equations: <br /> From Table 7 in Repoli 1301 Gals Find Effluent QuwW(QJ <br /> (W) in = (Q) gal x 1 ft x 365 day x 1 ape x 12 in x Find <br /> yr day 7.48 gal 1 year 43,560 fe t ft (A) <br /> 1.02 =',301 (;:...-.., ,.4.'gas J. —Z u'ayv i yea j x(i acic i 43,560 sy-iy x j i2 in l'i ii)x(i site/f i 5 apes) <br /> N�= WNJ1-dI+RN„ Hantzsche-Fennemore Equation(Ncl <br /> W+R <br /> 5.4 mgiL-N=((1.02 vVyr x 45 mg)L-N x(14.1))+(6.84 inlyr x 0.17mg/L-N))/(1.02 inlyr+584 in/yr) <br /> Variables: <br /> Nc=Average nitrate-N concentration(mglF)of combined effluent and rainfall percolate(5.4 mg/L-N). <br /> W=uniform waste water loading for study area(Myr)(1.02 inches/year). <br /> Nw=Total nitrate-N concentration of waste water percolate(45 mg1L-N). <br /> d=Fraction of nitrate-N loss due to denitrification in Bre soil(10%). <br /> R=uniform deep percolation of rainfall(6.64 intyr). <br /> Nb=Background nitrate-N concentration of rainfall(0.17 mg(L-N). <br /> Assumptions: <br /> 1. Nitrate-N concentration of waste stream based on estimate of 45 mg/L-N. <br /> Assumption based on work from Hanlzsche and Finnemore,1992. <br /> 2. Fraction of nitrate-N loss due to denitrification in the soul is assumed to be 10%. <br /> Assumption based on work from Hantzsche and Finnemore,1992. <br /> 3. Estimated deep percolation of rainfall is 6.84 inlyr,see deep percolation of rain worksheet <br /> 4. Assume background nitrate-N concentration of rainfall is 0.17 mg/L-N based on range by <br /> Hant niche and Fennemore,1992. <br /> =or• <br /> NIM a ANDERSON a ASSOG-INC + <br /> awv-aw .r.c`� <br /> Plate 9 <br />