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*- Nitrate Mass Balance Calculatiof^r <br /> Whiskey Slough Marina <br /> Data Input: <br /> Effluent Quantity(Q); 3,948 gals/day Concentration Rain(Nb); 1.00 mg/L-N <br /> Effluent Stream(N„): 45.00mg/L-N <br /> Denitrification(d): 35,0% <br /> Site Area(A); 29.00Acres Deep Perc, of Rain(R)! 4.oo in/yr <br /> Result: <br /> Mass Balance(N j: 10.0 mg/LN Waste Loading(W); 1,88 inryr <br /> MCL Drinking Water Nitrate as M 10.0 mg/L-N <br /> Percent of MCL Nitrate as N 100% <br /> Equations: <br /> (W) in = (q) gal x 1 ft' x 38. 5 day x 1 acre x 12 in x 1 Find <br /> yr day 7.48 gal 1 year 43,580 it ' 1 it (A)acre <br /> 1.89 iniyr(site) =3,849 gai/day x(1 cu-ft/7.48 gals)x(385 days/1 year)x(1 erre 143,560 sq-t})x(12 in/1 R)x(1 site/26 acres) <br /> N,= WNJI-dl+RNg Hantxsche-Fennemora Equation(No) <br /> W+R <br /> 10.05 mg/L-N=((1.89 in/yr x 45 mgiL-N x(1-0.35))+(4 in/yr x lmg1L-N))/(1.89/n/yr+4 in/yr) <br /> Variables: <br /> No=Average nitrate-N concentration(mg/1)of combined effluent and rainfall percolate (10.05 mg/L-N). <br /> W=Uniform waste water loading for study area(in/yr)(1.89 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 (41Nyr), <br /> 0 <br /> Assumptions: <br /> 1. Total nitrogen concentration of waste stream based on estimate of 45 mg/1--N, <br /> 2. Fraction of nitrate-N loss due to denitrification In the soil is assumed to be 35%. <br /> 3, Estimated deep percolatlon 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 /> '444 NEIL O. ANDERSON <br /> A N D A 5 5 0 C I A T E 5 <br /> Plate 10 <br />