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Nitrate Loading Calculations: <br /> Variable Value Units Description <br /> Q 400 gallons per day Effluent flow rate from report <br /> Nw 35 mg/L-N Effluent stream concentration from report <br /> A 1.50 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 3.6 inches per year Uniform waste water loading for site calculation result <br /> Nc 13.9 mg/L-N RESULT. Long-term average concentration of percolating effluent <br /> Find Variable(IM: <br /> (W) in = (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 /> 3.58 in/yr(site)=400 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/1.5 acres) <br /> Hantzsche-Fennemore Equation(Nc): <br /> N,= WN,,,(1-d)+M <br /> W+R <br /> 13.89 mg/L-N=((3.58 in/yr x 35 mg/L-N x(1-0.25))+(3.23 in/yr x 0.17mg/L-N))/(3.58 intyr+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.:13 <br /> JJFIP� Project No: 2109 <br /> _. Serna Property <br /> LIVE OAK 76 W.Bowman Rd. Date: February 23,2021 <br /> GEO ENVIRONMENTAL INC. French Camp,CA <br />