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Nitrate Loading Calculations: <br /> Variable Value Units Descriob'on <br /> Q 521.8 gallons per day Effluent flow rate from report <br /> Nw 85.4 mg/L-N Effluent stream concentration from report <br /> A 10 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 rain water from report <br /> W 0.70 inches per year Uniform waste water loading for site calculation result <br /> Nc 7.07 mglL-N RESULT: Long-term average concentration of percolating effluent <br /> Find Variable W <br /> (W) in = (Q) gal x 1 ft- x 365 day(s) x 1 acre x 12 in x 1 site <br /> yr day 7.48 gal 1 year 43,560 W 1 it (A)acre(s) <br /> ,11__ ., r <br /> 0.7 intyr(site)=522 gallday x(i cu-R l 7..48 gals)x(365 days/1 year)xF(1 acre 43 <br /> 1 ,560rsq-ft)x(12 in l 1 R)x(1 site/10 acres) - <br /> Find Concentration Nc(Hantzsche-Fennemore Equation): <br /> N,= WN (1-d)+RN. <br /> W+R <br /> 7.07 mgrL-N=((0.7 in/yr x 85.4 mgrL-N x(1-0.25)) +(6.58 in7yr x lmg/L-N))1(0.7 inryr+6.58 in(yr) <br /> Assumptions: <br /> 1. Total nitrogen concentration of influent waste stream is 85.4 mg/L-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 intyr. <br /> 4. Background nitrate-N concentration of rainfall is 1 mg/L-N. <br /> Nitrate Loading Calculation Plate No.: 11 <br /> (Existing Nitrate Included) <br /> r " Christ Lutheran Church Project No.: 1124 <br /> LIVE OAK 13021 N. Elderberry Ct. Date: September 21,2011 <br /> Lodi,CA 95242 <br />