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Worksheet No. 3 <br /> Estimated Ground Water Concentration <br /> After Mixing <br /> Data Input For Ground Water <br /> Given Aquifer Section (feet): 60.0 ft <br /> Est. Aquifer Porosity (%): 25.0% <br /> Ground Water Sample: 0.000 mg/L-N --Non-Detectable <br /> Concentration Rain N: 0.17 mg/L-N <br /> Site Acreage (A): 0.57 A <br /> Mass Balance Estimation for Nitrate (from Worksheet#2) Effluent <br /> Persons Use Effluent Stream Denitrification: Deep Perc. Rain Quantity Rate Naste Loading (W Aass Balance (Nc): <br /> 50 persons 5 gals/day/person 45.00 mg/L-N 15.0% 7.86 in 250 gals/day 5.90 in/yr 16.49 mg/L-N <br /> Volume of Ground Water <br /> Acres Aquifer Section Estimated Porosity Acre Feet Ground Water <br /> 0.57 A 60.0 ft 25% 8.55 AF <br /> Volume of Septic Effluent and Deep Percolation Rain <br /> Acres Waste Loading NV) )eep Percolation RaiW+ Rain (in/yr) W + Rain (ft/yr) W+ Rain (Acre-ft/year) <br /> 0.57 A 5.90 in/yr 7.9 in 13.8 in 0.05 ft/yr 0.03 AF/yr <br /> Estimation of Nitrate in Water <br /> N-Concentration Volume Volume Nitrate <br /> For Aquifer: 0.00 mg/L-N 8.55 AF 10,544,390 L 0 mg-N <br /> For W+ Rain: 16.49 mg/L-N 0.03 AF 33,391 L 550,658 mg-N <br /> Total: 10,577,781 L 550,658 mg-N <br /> *Given a 60 foot aquifer section, the concentration of ground <br /> water after one (1) mixing per year is estimated to be: 0.052 mg/L-N <br /> Maximum Contaminate Level (MCL), Drinking Water Standard: 10.0 mg/L-N <br /> Percent MCL-N of Ground Water Before Mixing: 0.0% <br /> Percent MCL-N of Ground Water After Mixing: 0.5% NEIL o.ANDERSON&ASSOC.,INC.OEOIE01N CALSERN("S-E"NEERNG LABORATO.-71"-.1 nLn.Lodi.CA 9520 Conservative assumption of one (1) volume of ground water mixing for the site for a year. nm)"'"°' (So <br /> Ground water most likely flows below the site. <br />