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Nitrate Loading Calculations: <br /> Variable Value Units Description <br /> Q 521.8 gallons per day Effluent flow rate from report <br /> Nw 57.4 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 5.05 mglL-N RESULT: Long Eerm average concentration of percolating effluent <br /> Find Variable(W <br /> (W) in = (Q) gal x 1 ft-' x 365 day(sl x 1 acre x 12 in x 1 site <br /> yr day 7.48 gal 1 year 43,560 ftz 1 ft (A) acre(s) <br /> 0.7 in/yr(site)=522 gaUday x(1 cu-ft/7.48 gals)x(365 days/1 year)x(1 acre/43,560 sq-N)x(12)n/1 ft)x(1 site/10 acres) <br /> Find Concentration Nc(Hantzsche-Fennemore Equation). <br /> N,= WN,„(1<L+RN <br /> W+R <br /> 5.05 mg/L-N=((0.7 in/yr x 57.4 mg/L-N x(1-0.25))+(6.581n/yr x lmg/L-N))/(0.7 in/yr+6.58 in/yr) <br /> Assumptions: <br /> 1. Total nitrogen concentration of influent waste stream is 57.4 mg/L-N. If different influent concentrations exist,use weighted average <br /> 2. Fraction of ndrate-N loss due to denitrification in the soil is 25W <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 /> Nitrate Loading Calculation Plate No.: 10 <br /> - (Standard Method) <br /> Project No.: 1124 <br /> Christ Lutheran Church <br /> LIVE OAK 13021 N.Elderberry Ct. Date: September 21,2011 <br /> Lodi, CA 95242 <br />