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Nitrate Loading Calculations: <br />Variable Value Units Description <br />Q 420 gallons per day Effluent flow rate from report <br />Nw 35 mg/L-N Effluent stream concentration from report <br />A 10.0 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 3.64 inches per year Recharge rate of rainfall from report (evapotranspiration method) <br />W 0.6 inches per year Uniform waste water loading for site calculation result <br />Nc 4.4 mg/L-N RESULT: Long-term average concentration of percolating effluent <br />Find Variable MO: <br />(W) j . = (Q) gal x JA2 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 />0.56 in/yr (site). 420 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 / 10 acres) <br />Hantzsche Fennemore Equation (Nc): <br />Nc = WN(1-c1)+RN, <br />W+R <br />4.39 mg/L-N = ((0.56 in/yr x 35 mg/L-N x (1 -0.25)) + (3.64 in/yr x 1 mg/L-N)) 1(0.56 in/yr + 3.64 in/yr) <br />Assumptions: <br />Total nitrogen concentration of influent waste stream is 35 mg/L-N. If different influent concentrations exist, use weighted average <br />Fraction of nitrate-N loss due to denitrification in the soil is 25%. <br />Estimated deep percolation of rainfall is 3.64 in/yr. <br />Background nitrate-N concentration of rainfall is 1 mg/L-N. <br />LIVE OAK <br />GEO ENVIRONMENTAL INC, <br />• <br />Nitrate Loading Calculation <br />Madzier Property <br />11006 E. St. Rt. 120 <br />Manteca, CA <br />Plate No.: 16 <br />Project No: 1924 <br />Date: May 30,2019 <br /> 4