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Nitrate Mass Balance Calculation �ftd <br /> (10--Acre Parcel) <br /> Data Input: <br /> Waste Loading(W): 0.71 lrVyr <br /> Site Area(A): 10 00 Acre <br /> Effluent Quantity(Q): 525 Gals Concentration Rain(Nb): 1.00 mg&-N <br /> Effluent Stream(Nw): 45.00 mg&-N Denitrification(d): 25% <br /> ResultDeep Perc.of Rain(R): 1.85 inches <br /> Mass Balance(Nc): 10.0 ffV&-N <br /> MCL Drinking Water Nitrate as N: 10.00 mg/L-N <br /> Percent of MCL Nitrate as N 100% <br /> Equations: <br /> From Table 7 in Report: 525 Gals Fina Effluent Qu►aM to) <br /> (W) io,- = (Q) " x S fe— x 365 day x 1 acre x 12-1h x 1 Fin <br /> Yr day 7.48 pal 1 year 43.560 ftp 1 ft (A) <br /> a 71 in/yr(sffe)=525 gallday x(1 cu-it 17.48 gals)x(385 dayal 1 year)x(1 acre 143,580 sq-ft)x(12 fn/11f)x(1 sffe 110 acres) <br /> N,=_MfN,..f 1-d)+RHantrAche-Fennsmc Eag&!Na) <br /> W+R <br /> 10.04 mg!/L-N=((0.71 in/yr x 45 mg✓L-N x(1-0.25))+(1.851n/yr x 1mg1L-N))/(0.711W+1.85#W) <br /> VarlaMes: <br /> No=Average nitrate-N concentration(mgA)of combined effluent and rainfall percolate(10.04 mg/L-N). <br /> W=Uniform wastewater loading for study area(lnlyr)(0.71 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(25%). <br /> R=Uniform deep percolation of rainfall(1.85 in/yr). <br /> Nb=Background nitrate-N concentration of rainfall(1 mg/"). <br /> AssurnpUons: <br /> 1. Nitrate-N concentration of waste stream based on estimate of 45 mg/L-N. <br /> Assumption based on work from Hantzsche and Finnemore, 1992. <br /> 2. Fraction of nitrate-N loss due to denifriflc ation in the soil is assumed to be 25%. <br /> Assumption based on work from Hantzsche and Finnemore, 1992. <br /> 3. Estimated deep percolation of rainfall is 1.85 in/yr,see deep percolation of rain worksheet. <br /> 4. Assume ground nitrate-N concentration of rainfall is 1 mg/L-N fused on range by <br /> Hantzsche and Fennemore, 1%Q. <br /> NEIL O.ANDERSON i ASSOC..INC. <br /> palmy. <br /> a1WY�iLIKM " <br /> Plate 5 <br />