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Nitrate Loading Calculations: <br /> Variable Value Units Description <br /> Q 150 gallons per day Effluent flow rate from report <br /> Nw 35 mg/L-N Effluent stream concentration from report <br /> A 0.42 acres Site area from report <br /> Nb 0.30 mg/L-N Concentration of rain water from report <br /> d 0.25 constant Denitrification factor from report <br /> R 11.78 inches per year Recharge rate of rainfall from report <br /> W 4.8 inches per year Uniform waste water loading for site calculation result <br /> Nc 7.8 mg/L-N RESULT: Long-term average concentration of percolating effluent <br /> Find Variable W <br /> (W) jo- = (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 /> 4.8 in/yr(site)=150 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/0.42 acres) <br /> Hantzsche-Fennemore Equation(Nc): <br /> N,,= WN,(1-d)+RNe <br /> W+R <br /> 7.81 mg/L-N=((4.8 in/yr x 35 mg/L-N x(1-0.25))+(11.78 in/yr x 0.3mg/L-N))/(4.8 in/yr+11.78 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 25%. <br /> 3. Estimated deep percolation of rainfall is 11.78 in/yr. <br /> 4. Background nitrate-N concentration of rainfall is 0.3 mg/L-N. <br /> A&VA Nitrate Loading Calculation Plate No.: 13 <br /> jspp� Project No: 20-41 <br /> _. Nienhuis Property <br /> LIVE OAK 5828 E.Fairlane Rd. Date:September 10,2020 <br /> GEO ENVIRONMENTAL INC. Acampo,CA <br />