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Nitrate Loading Calculations: <br />Variable <br />Value <br />Units <br />Description <br />Q <br />500 <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 />35.21 <br />acres <br />Site area from report <br />Nb <br />0.15 <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 />2.25 <br />inches per year <br />Recharge rate of rainfall from report (evapotranspiration method) <br />W <br />0.2 <br />inches per year <br />Uniform waste water loading for site calculation result <br />Nc <br />1.9 <br />mg/L-N <br />RESULT. Long-term average concentration of percolating effluent <br />Find Variable (W <br />(W) in = (Q) gal x 1 ft3 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 />0.19 in/yr (site) = 500 gal/day x (1 cu -ft/ 7.48 gals) x (365 days/ 1 year) x (1 acre 143,560 sq -ft) x (12 in / 1 ft) x (1 site 135.21 acres) <br />Hantzsche-Fennemore Equation (Nc): <br />N�= WN,j1-d)+RN, <br />W+R <br />1.92 mg/L-N = ((0.19 in/yr x 35 mg/L-N x (1 - 0.35)) + (2.25 in/yr x 0,15mg/L-N)) / (0.19 in/yr + 2.25 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 2.25 in/yr. <br />4. Background nitrate -N concentration of rainfall is 0.15 mg/L-N. <br />LIVE OAK <br />GEO ENVIRONMENTAL INC. <br />Nitrate Loading Calculation, Plate No.: 18 <br />Parcel 2 (Two Houses) Project No: 2141 <br />La Velle /Lara Property <br />32521, 32619, & 32705 S. Koster Rd. Date: November 12, 2021 <br />Tracy, CA <br />