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Nitrate Loadinq Calculations: <br />Variable <br />Value <br />Units <br />Description <br />Q <br />150 <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 />0.46 <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 />9.42 <br />inches per year <br />Recharge rate of rainfall from report (evapotranspiration method) <br />W <br />4.4 <br />inches per year <br />Uniform waste water loading for site calculation result <br />Nc <br />7.3 <br />mg/L-N <br />RESULT: Long-term average concentration of percolating effluent <br />Find Variable (IM: <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 ft2 1 ft (A) acre(s) <br />4.38 in/yr (site) = 150 gal/day x (1 cu -ft 17.48 gals) x (365 days/1 year) x (1 acre /43, 560 sq -ft) x (12 in / 1 ft) x (1 site 10.46 acres) <br />Hantzsche-Fennemore Equation (Nc): <br />Nc= WIN (1-d)+RW <br />W+R <br />7.34 mgA-N = ((4.38 in/yr x 35 mgiL-N x (1 - 0.35)) + (9.42 in/yr x 0.17mg/L-N)) / (4.38 in/yr + 9.42 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 9.42 in/yr. <br />4. Background nitrate -N concentration of rainfall is 0.17 mg/L-N. <br />A&' <br />JJFTW <br />LIVE OAK <br />GEO ENVIRONMENTAL INC. <br />Nitrate Loading Calculation <br />Pinnell Property <br />8888 W. Pine St. <br />Thornton, CA <br />Plate No.: 13 <br />Project No: 2135 <br />Date: July 7, 2021 <br />