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x 365 day(s) <br />1 year <br />Find Variable (IN): <br />(w) = (Q) gj x 1 ft3 <br />yr day 7.48 gal <br />x 1 acre x 12 in x 1 site <br />43,560 ft2 1 ft (A) acre(s) <br />If different influent concentrations exist, use weighted average <br />Assumptions: <br />Total nitrogen concentration of influent waste stream is 35 mg/L-N <br />Fraction of nitrate-N loss due to denitrification in the soil is 35%. <br />Estimated deep percolation of rainfall is 8.41 in/yr. <br />Background nitrate-N concentration of rainfall is 0.136 mg/L-N. <br />Plate No.: 13 Nitrate Loading Calculation <br />Sandoval Property <br />25130 N. Pearl Rd. <br />Acampo, CA <br />Project No: 2219 <br />Date: April 5, 2022 LIVE OAK <br />GEO ENVIRONMENTAL INC, <br />Nitrate Loading Calculations: <br />Variable Value Units Description <br />650 gallons per day Effluent flow rate from report <br />Nw 35 mg/L-N Effluent stream concentration from report <br />A 4.95 acres Site area from report <br />N b 0.136 mg/L-N Concentration of rain water from report <br />0.35 constant Denitrification factor from report <br />8.41 inches per year Recharge rate of rainfall from report (evapotranspiration method) <br />1.8 inches per year Uniform waste water loading for site calculation result <br />Nc 4./ mg/L-N RESULT: Long-term average concentration of percolating effluent <br />1.77 in/yr (site) = 650 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 /4.95 acres) <br />Hantzsche-Fennemore Equation (Nc): <br />t\lc = VVN,„(1-d)+RI\li, <br />W+R <br />4.06 mg/L-N = ((1.77 in/yr x 35 mg/L-N x (1 - 0.35)) + (8.41 in/yr x 0.136mg/L-N))/ (1.77 in/yr + 8.41 in/yr)