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Nitrate Loading Calculations: <br />Variable <br />Value <br />Units <br />Description <br />Q <br />400 <br />gallons per day <br />Effluent flow rate from report <br />Nw <br />35 <br />mg/L-N <br />Effluent stream concentration from report <br />A <br />2.42 <br />acres <br />Site area from report <br />Nb <br />0.17 <br />mg/L-N <br />Concentration of rain water from report <br />d <br />0.35 <br />constant <br />Denitrification factor from report <br />R <br />3.23 <br />inches per year <br />Recharge rate of rainfall from report (evapotranspiration method) <br />W <br />2.2 <br />inches per year <br />Uniform waste water loading for site calculation result <br />Nc <br />9.4 <br />mg/L-N <br />RESULT. Long-term average concentration of percolating effluent <br />Find Variable (W <br />(W) in = (Q) gal 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 ftz 1 ft (A) acre(s) <br />2.22 in/yr (site) = 400 gal/day x (1 cu -ft / 7.48 gals ) x (365 daysr 1 year) x (1 acre / 43,560 sq -ft) x (12 in / 1 R) x (1 site / 2.42 acres) <br />Hantzsche-Fennemore Equation (Nc): <br />N,= WN,,,(1-d)+RN,, <br />W+R <br />9.37 mg/L-N = ((2.22 in/yr x 35 mg/L-N x (1 - 0.35)) + (3.23 in/yr x 0.17mg/L-N)) / (2.22 in/yr + 3.23 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 rainfall is 3.23 in/yr. <br />4. Background nitrate -N concentration of rainfall is 0.17 mg/L-N. <br />J1111116 - <br />LIVE OAK <br />GEO ENVIRONMENTAL INC. <br />Nitrate Loading Calculation <br />Ruiz Property <br />11671 E. Ada Ave. <br />Stockton, CA <br />Plate No.: 13 <br />Project No: 2144 <br />Date: September 15, 2021 <br />