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'4. Nitrate Mass Balance Calculation <br /> Whiskey Slough Marina <br /> Data Input: <br /> Effluent Quantity(Q): 960gals/day Concentration Rain(NJ 1.00mgE-N <br /> Effluent Stream(N,); 45.00mg/L-N Denitr'Ification (d): 35,0% <br /> Site Area (A): 26.00Acras Deep Perc, of Rain(R): 4.00in/yr <br /> Result: <br /> Mass Balance(N j: 4.1 mg/L-N Waste Loading (W); O.SOin/yr <br /> MCL Drinking Water Nitrate as N: 10.0 mg/L-N <br /> Percent of MCL Nitrate as N 41% <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 43,550 ft z 1 ft (A)acre <br /> 0.5 In/yr(site)=960 gai/day x(1 cu-ft/7-48 gals)x(365 days/1 year)x(1 acre/43,560 sq-ft)x(12/n/1 ft)x(1 site/26 acres) <br /> N,= WNw(1d)+RN. Hantzsche-PeonemoreEquation fNcl <br /> W+R <br /> 4.12 mg/L-N=((0.5 in/yr x 45 mgt-N x(1-0.35))+(4 in/yr x Jmg/L-N))/(0.5 in/yr+4 in/yr) <br /> Variables: <br /> Nc=Average nitrate-N concentration(mg/1)of combined effluent and rainfall percolate (4,12 mg/L-N). <br /> W=Uniform waste water loading for study area(in/yr)(0.5 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(35%). <br /> R=Uniform deep percolation of rainfall (4 in/yr). <br /> 0 <br /> Assumptions: <br /> 1. Total nitrogen concentration of waste stream based on estimate of 45 mg/L-N. <br /> 2. Fraction of nitrate-N loss due to denitrification in the soil is assumed to be 35%. <br /> 3. Estimated deep percolation of rainfall is 4 in/yr,see deep percolation of rain worksheet. <br /> 4, Assume background nitrate-N concentration of rainfall is 1 mg/L-N. <br /> 'A4 NEIL O. ANDERSON <br /> A N D A S S O C I A T F, S <br /> Plata 10 <br />