Laserfiche WebLink
Nitrate Mass Balance Calculation - Revised <br /> Phrabuddhivongsamunee Buddhist Temple (APN: 055-200-03) <br /> Septic System No. 1, 2, 3 - Proposed 12 Bedroom Dormitory <br /> Terracon Project No. NA177056 <br /> Data Input: <br /> Effluent Quantity(Q): 1,000 gals/day <br /> Effluent Stream(N„,): 4 7.00 mg/L-N <br /> Site Area(A): 4.60 Acres <br /> Concentration Rain(No): 1.00 mg/L-N <br /> Denitrification(d): 30.0% <br /> Deep Perc.of Rain(R): 9.05 in/yr <br /> Result: <br /> Mass Balance(NJ: 8.8 mg/L-N <br /> MCL Drinking Water Nitrate as N: 10.0 mg/L-N <br /> Percent of MCL Nitrate as N 88% <br /> Waste Loading(W): 2.92 in/yr <br /> Equations: <br /> Find W <br /> (W) in = (Q) gal x 1 ft3 x 365 day x 1 acre x 12 in x 1 <br /> yr day 7.48 gal 1 year 43,560 ftz 1 ft (A)acre <br /> 2.92 in/yr(site)=1,000 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(t)x(1 site/4.6 acres) <br /> N�= WN„ 1( -d)+RN,, <br /> +R - <br /> VV Hantzsche-Fennemore Eauation(NO <br /> 8.79 mg/L-N=((2.92 in/yr x 47 mg/L-N x(1-0.3))+(9.05 in/yr x 1 mg/L-N))/(2.92 in/yr+9.05 in/yr) <br /> Variables: <br /> Nc=Average nitrate-N concentration(mg/1)of combined effluent and rainfall percolate(8.79 mg/L-N). <br /> W=Uniform waste water loading for study area(in/yr)(2.92 inches/year). <br /> Nw=Total nitrate-N concentration of waste water percolate(47 mg/L-N). <br /> d=Fraction of nitrate-N loss due to denitrification in the soil(30%). <br /> R=Uniform deep percolation of rainfall(9.05 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 47 mg/L-N. <br /> 2. Fraction of nitrate-N loss due to denitrification in the soil is assumed to be 30%. <br /> 3. Estimated deep percolation of rainfall is 9.05 in/yr,see deep percolation of rain worksheet. <br /> 4. Assume background nitrate-N concentration of rainfall is 1 mg/L-N. <br /> Irerracon <br />