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II <br /> I <br /> li II <br /> i <br /> � I <br /> I i <br /> Table 1 <br /> SELECTED PHYSICAL PARAMETERS OF CONTAMINANTS <br /> f <br /> Molecular FOD Partition <br /> Henry's Vapor Diffusion <br /> Weight Coefficient Coefficient(Koc) Solubility Constant(Hc) Pressure(20°C) Coefficient(HZO) <br /> (g/mole) (Days) (mL/g) (mg/L) (atm) (ern/s) <br /> I <br /> I <br /> II <br /> Benzene 78 720 3 8 1800 022 0 125 1 10E-05 <br /> Toluene ; 92 28 135 I 524 026 0 037 9 40E-06 <br /> r <br /> Ethylbenzeae 106 228 -1290 206 0 32 0 0125 8 50E-06 <br /> I � - <br /> Xylenes(total) 106 360 240 } 200 029 00087 8 50E-06 <br /> MTBE 88 15 360 1 15 1 48000 0 024 025 8 71 E-06 <br /> I <br /> Explanation <br /> g/mole grams per mole <br /> mug milliliters per gram j <br /> mg/L nulligrams per liter <br /> atm atmospheres - <br /> cmZ/s square centimeters per second <br /> MTBE Methyl tertiary butyl ether <br /> FOD Fust order decay <br /> Data after Aruianantham and Salhotra, 1996 <br /> I I r <br /> I <br /> I I � <br /> CLEARWATER GROUP(NATURAL ATTENUATION) <br /> revised October 3,2002 <br /> I <br /> � i i <br />