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Nitrate Loading Calculations: <br /> Variable Value Units Description <br /> Q 840 gallons per day Effluent flow rate from report <br /> Nw 35 mg/L-N Effluent stream concentration from report <br /> A 2.00 acres Site area from report <br /> Nb 0.3 mg/L-N Concentration of rain water from report <br /> d 0.35 constant Denitrification factor from report <br /> R 12.60 inches per year Recharge rate of rainfall from report(evapotranspiration method) <br /> W 5.6 inches per year Uniform waste water loading for site calculation result <br /> Nc 7.2 mg/L-N RESULT: Long-term average concentration of percolating effluent <br /> Find Variable(W) <br /> (Wu) in = (Q) g-al 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 /> 5.65 in/yr(site)=840 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/2 acres) <br /> Hantzsche-Fennemore Equation(Nc): <br /> Nc= WN,(1-d)+RW <br /> W+R <br /> 7.25 mg/L-N=((5.65 in/yr x 35 mgrL-N x(1-0.35))+(12.6 in/yr x 0.3mg/L-N))/(5.65 in/yr+12.6 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 12.6 in/yr. <br /> 4. Background nitrate-N concentration of rainfall is 0.3 mg/L-N. <br /> Aga Nitrate Loading Calculation Plate No.: 15 <br /> Project No: 1933 <br /> LaPierre Property <br /> LIVE LAK 3231 E.Spiess Rd. Date: June 28,2019 <br /> GEO ENVIRONMENTAL INC. Acampo,CA <br />