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Nitrate Loading Calculations: <br /> Variable Value units Descdotion <br /> Q 1960 gallons per day Effluent flow rate from report <br /> Nw 35 mg/L-N Effluent stream concentration from report <br /> A 2.13 acres Site area from report <br /> Nb 1.00 mg/L-N Concentration of rain water from report <br /> d 0.35 constant Denitrification factor from report <br /> R 7.4 inches per year Deep percolation of rainwater from report <br /> W 12.4 inches per year Uniform waste water loading for site calculation result <br /> No 14.6 nri RESULT: Long-tenn average concentration of percolating effluent <br /> Find Variable(W): <br /> (VV)- 1[L = (Q) gal x 1 W x 365 day(s) x Iacre_ x .]2j0- x 1 site <br /> yr day 7.48 gal 1 year 43,560 ft2 1 ft (A)acre(s) <br /> 12371nryr(site)=1,960 galydayx(1 co-R/7.48 gals)x(365 daysr 1 year)x(1 acre/4$560 sq-8)x(12 in/1 ft)x(1 site/2.13 acres) <br /> Hantzsche-Fennemore Eguation(Nc): <br /> • N,= WN (1-d)+RNA <br /> W+R <br /> 14.61 mryL-N=((12.37 in(yr x 35 mgd.-N x(1-0.35))+(7.4 ir✓yr x lmg,L-N))/(1237 inyr+7,4 in6T) <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 7.4 in/yr. <br /> 4. Background nitrate-N concentration of rainfall is 1 mg/L-N. <br /> Plate No.: 8 <br /> Nitrate Loading Calculation <br /> y r <br /> • Atwal Property Project No: 1833 <br /> LIVE OAK 28488 S. Bird Rd. Date: June 18,2017 <br /> GEO ENVIRONMENTAL INC. Tracy, CA <br />