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Nitrate Loading Calculations: <br /> Variable Value Units Description <br /> Q 1085 gallons per day Effluent flow rate from report <br /> Nw 39.8 mg/L-N Effluent stream concentration from report <br /> A 21.70 acres Site area from report <br /> Nb 1.00 mg/L-N Concentration of rain water from report <br /> d 0.25 constant Denitrificafion factor from report <br /> R 13.70 inches per year Deep percolation of rain water from report <br /> W 0.67 inches per year Uniform waste water loading for site calculation result <br /> Nc 2.3 mg/L-N RESULT. Long-temp average concentration of percolating effluent <br /> Find Vadable(IM: <br /> (VV) t = (Q) a x 1W x 365 dav(s) x t acre x 12 in x 1 site <br /> yr day 7.48 gal 1 year 43,560 ftz 1 It (A)acre(s) <br /> 0.67 in/yr(site)=1,085 get1day x(1 cu-ft/7.48 gals)x(365 daysr 1 year)x(1 acre 143,560 sq-ft)x(12 in/I B)x(1 site/21.7 acres) <br /> Hanhsche-Fennemore Equation(Nc): <br /> N�= VVNw(1-d)+RN. <br /> W+R <br /> 2.35 mgr.-N=((0.67 inyr x 39.8 mgA-N x(1-0.25))+(13.7 inyr x 1mgiL-N))/(0.67 in/yr+13.7 inyr) <br /> Assumptions: <br /> 1. Total nitrogen concentration of influent waste stream is 39.8 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 25%. <br /> 3. Estimated deep percolation of rainfall is 13.7 ii <br /> 4. Background nitrate-N concentration of rainfall is 1 mg/L-N. <br /> Plate No.: 11 <br /> Nitrate Loading Calculation <br /> Project No: 1820 <br /> Lockewood Stables Date: April 13,2018 <br /> LIVE OAK 20703 N.Elliott Rd. <br /> GEO ENVIRONMENTAL INC. Lockeford, CA <br />