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Nitrate Mass Balance Calculations <br /> Heritage Oak Winery <br /> Nitrate Loading Calculations: <br /> Variable Value units Description <br /> o 751.7 gallons per day Effluent flow rate from report <br /> Nw 53.1 mg/L-N Effluent stream concentration from report <br /> A 10.00 acres Site area from report <br /> Nb 1.00 mg/L-N Concentration of rain water from report <br /> d 0.25 constant Denitrification factor from report <br /> R 6.58 inches per year Deep percolation of rainwater from report <br /> W 1.01 inches per year Uniform waste water loading for site calculation result <br /> Nc 8.17 mg/L-N RESULT: Long-term average concentration of percolating effluent <br /> Find Variable(W): <br /> (W) in = (Q) gal x 1 ft'- x 365 da s x 1 acre x 12 in x 1 site <br /> yr day 7.48 oal 1 veer 43.560 ft 1 R (A)acre(s) <br /> /37 b ji CWD 27A 0 / <br /> 1.01 frVyr(site)=752 gal/day x(1 cu-})/ . gals)x(365 daysr 1 year)x(1 acre/43,560 sq-ft)x(12 in/1 ft)x(1 si(a/10 acres) = L 0 <br /> Hantzsche-Fennemore Equation(Nc): <br /> N�= WN„ L-d)+RN_c <br /> W+R <br /> �S 5 <br /> 6.17 mgt-N=((1.01 in/yr x 53 1)mgrL-N x(1-0.25))+(6.58 inyr x lmg/L-N))/(.01#W+6.58 in/yr) <br /> Assumptions: <br /> 1. Total nitrogen concentration of influent waste stream is 53.1 mgt--N. If different influent concentrations exist,use weighted average <br /> 2. Fraction of nitrate-N loss due to denitrification in the soil is 25%. <br /> 3. Estimated deep percolation of rainfall is 6.58 in/yr. <br /> 4. Background nitrate-N concentration of rainfall is 1 mg/L-N. <br />