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Nitrate Loading Calculations: <br /> Variable Value Units Description <br /> Q 560 gallons per day Effluent flow rate from report <br /> Nw 35 mg/L-N Effluent stream concentration from report <br /> A 0.98 acres Site area from report <br /> Nb 0.3 mg/L-N Concentration of rainfall from report <br /> d 0.35 constant Denitrification factor from report <br /> R 4.64 inches per year Recharge rate of rainfall from report <br /> W 7.7 inches per year Uniform waste water loading for site calculation result <br /> Ne 14.3 mg/L-N RESULT. Long-term average concentration of percolating effluent <br /> Find Variable(lM: <br /> (W) in = (Q) g$@I x 11 W x 365 day(s) x 1 acre x 12 in x 1 site <br /> yr day 7.48 gal 1 year 43,560 ft2 1 ft (A)acre(s) <br /> 7.68 in/yr(site)=560 gal/day x(1 cu-ft/7.48 gals)x(365 days/1 year)x(1 acre/43,560 sq-ft)x(12 in/1 ft)x(1 site/0.98 acres) <br /> Hantzsche-Fennemore Equation ft): <br /> N�= WN.,,(1-d)+RN,. <br /> W+R <br /> 14.3 mg/L-N=((7.68 in/yr x 35 mg/L-N x(1-0.35))+(4.64 in/yr x 0.3mg/L-N))/(7.68 in/yr+4.64 in/yr) <br /> Assumptions: <br /> 1. Total nitrogen concentration of influent waste stream is 35 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 35%. <br /> 3. Estimated deep percolation of recharge waters is 4.64 in/yr. <br /> 4. Background nitrate-N concentration of rainfall is 0.3 mg/L-N,per LOGE sampling results. <br /> Nitrate Loading Calculation Plate No.: 16 <br /> J9 (4-Bedroom House) Project No: 1910 <br /> wy-- Kumar Property <br /> LIVE OAK 11325 W.Larch Rd. <br /> GEO ENVIRONMENTAL INC. Tracy,CA <br />