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NOV05 <br /> Mass in Groundwater. <br /> Based on analytical results November 2005 <br /> porosity 25%, saturated thickness 20 feet. <br /> Area Volume Average Mass of Mass of <br /> Contaminant (sq-ft.) (cu. ft.) Concentration Contaminant Contaminant <br /> (Ug,l) k (lbs) <br /> Zone 1 - Innermost contour <br /> TPHG 1400 28000 30000.0 5.94 13.07 <br /> Benzene 600 12000 1450.0 0.12 0.27 <br /> Toluene 600 12000 1500.0 -0.13i 0.28 <br /> Eth lbenzene 700 14000 1750.0 0.17 0.38 <br /> Xylenes 600 12000 12500.01 1.06 2.33 <br /> Zone 2 <br /> TPHG 4400 88000 5500.0 3.42 7.53 <br /> Benzene 2100 42000 550.0 0.16 0.36 <br /> Toluene 2100 42000 550.0 0.16 0.36 <br /> Eth lbenzene 3200 64000 550.0 0.25 0.55 <br /> Xylenes 11001 220001 5500.01 0.861 1.88 <br /> Zone 3 <br /> TPHG 7600 152000 550.0 0.59 1.30 <br /> Benzene 4000 80000 55.0 0.03 0.07 <br /> Toluene 4000 80000 55.0 0.03 0.07 <br /> Eth lbenzene 7400 148000 55.0 0.06 0.13 <br /> Xylenes 31 00 62000 550.01 0.241 0.53 <br /> Zone 4 <br /> TPHG 3500 70000 55.0 0.03 0.06 <br /> Benzene 6100 122000 5.5 0.00 0.01 <br /> Toluene 6100 122000 5.5 0.00 0.01 <br /> Ethylbenzene 6100 122000 5.5 0.00 0.01 <br /> Xylenes 49001 980001 55.01 0.04 0.08 <br /> Zone 5 <br /> X lenes 5400 1080001 5.51 0.001 0.01 <br /> Total Mass of Contaminants in Groundwater <br /> TPHG 9.98 21.97 <br /> Benzene 0.32 0.71 <br /> Toluene 0.33 0.72 <br /> Eth lbenzene 0.48 1.07 <br /> Xylenes 7.70 16.93 <br /> NOTES <br /> Based on isoconcentration contours November 2005 isoconcentration map. <br /> Assume similar distribution for other detected constituents. <br /> mass = (Volume in cu ft)(porosity)(Conc. in ppb)(E-9)(7.48 gal/cu ft)(8.34 lblgal)(0.4536 kgllb) <br /> Thickness of aquifer is 20 feet; porosity is 0.25; <br /> k.11 <br /> Page 2 <br />