Laserfiche WebLink
Nitrate Mass Balance Calculation, Addendum Letter <br /> Data Input: a� <br /> Effluent Quantity(Q); 417 gals/da Concentration Rain (Nb): 1.00 mg/L-N <br /> Effluent Stream (NH,):;58:10-rng/L- Denitrification (d): 15.0% <br /> Site Area (A): 5.07 cres Deep Perc. of Rain (R): 5.76 in/yr <br /> /) Waste Loading (W): 1.11 in/yr <br /> Result: <br /> Mass Balance(N j: 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 /> 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 ftz 1 ft (A)acre <br /> 1.11 in/yr(site) =417 gal/day x(1 cu-ft/7.48 gals)x(365 days/1 year)x(1 acre 143,560 sq-ft)x(12 in/1 ft)x(1 site 15.07 acres) <br /> N,= WN-(1-d)+RN,, Hantzsche-Fennemore Equation(Nc) <br /> W+R <br /> 8.79 mg/L-N=((1.11 ids/yr x 58.1 mg/L-N x(1-0.15))+(5.76 in/yr x 1mg/L-N))/(1.11 in/yr+5.76 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) (1.11 inches/year). <br /> Nw=Total nitrate-N concentration of waste water percolate(58.1 mg/L-N). <br /> d= Fraction of nitrate-N loss due to denitrification in the soil (15%). <br /> R= Uniform deep percolation of rainfall (5.76 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 58.1 mg/L-N. <br /> 2. Fraction of nitrate-N loss due to denitrification in the soil is assumed to be 15%. <br /> 3. Estimated deep percolation of rainfall is 5.76 in/yr, see deep percolation of rain worksheet. <br /> 4. Assume background nitrate-N concentration of rainfall is 1 mg/L-N. <br /> '-.44NEIL O. ANDERSON <br /> A N D A S S O C I A T E S <br /> f late 1 <br />