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Nitrate Loading Calculations: <br /> Variable Value Units Description <br /> Q 200 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 0.17 mg/L-N Concentration of rain water from report <br /> d 0.25 constant Denitrification factor from report <br /> R 3.23 inches per year Recharge rate of rainfall from report <br /> W 1.3 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) in = (Q) g_l 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 ftz 1 ft (A)acre(s) <br /> 1.34 in/yr(site)=200 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/2 acres) <br /> Hantzsche-Fennemore Equation ft): <br /> N,= WN..(1-d)+RNA <br /> W+R <br /> 7.83 mg/L-N=((1.34 in/yr x 35 mg/L-N x(1-0.25))+(3.23 in/yr x 0.17mg/L-N))/(1.34 in/yr+3.23 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 3.23 in/yr. <br /> 4. Background nitrate-N concentration of rainfall is 0.17 mg/L-N. <br /> Nitrate Loading Calculation Plate No.:15 <br /> (Parcel 1) Project No: 2111 <br /> Van Dyk Property <br /> LIVE OAK 20290&20306 E.River Rd. Date:March 11,2021 <br /> GEO ENVIRONMENTAL INC. Ripon,CA <br />