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33. Stutzmann, T., and B. Siffert, "Contribution to the Absorption Mechanism of Acetamide <br />and Polyacrylamide on to Clays," Clays Clay Miner., 25, 392-406 (1977). <br />34. Tolstikh, L. L, N. L Akimov, I. A. Golubeva, and L A. Shvetsov., "Degradation and <br />Stabilization of Polyacrylamide in Polymer Flooding Conditions," Int J Polymeric <br />Material, 17, 177-193 (1992). <br />35. US Environmental Protection Agency (EPA), List of Contaminants & their MCLs, EPA <br />816-F-02-013,(2002). <br />36. Wallace, A., G. A. Wallace, and A. M. Abouzamzam., "Effects of Excess Levels of a <br />Polymer as a Soil Conditioner on Yields and Mineral Nutrition of Plants," Soil Sci., 141, <br />377-379 (1986). <br />37. Windholz, M., Merck Index - An Encyclopedia of Chemicals, Drugs and <br />Biologicals, Merck and Co., lnc., Rahway, NJ., (1983). <br />Table 1. Physical Properties of Selected Components of TPH. <br />Component Mol. Mol. Vapor <br /> <br />Formula Weight Pressure <br />° Log IC°„` Solubilityd <br /> (g/mol) (T=25 <br />C) g/L <br /> mm Hg <br />Undecane CiiHz4 156 0.5988a 6.94 Sparingly soluble <br />Dodecane C,zHza 170 0.12" 7.24 3.75E-OS <br />Tridecane Ci3HZS 184 0.03756 7.57 Sparingly soluble <br />Tetradecane CiaH3o 198 0.0286a 7.2 Sparingly soluble <br />aPerry and Green (28). <br />6Lide (25). <br />`Gustafson et al. (19). <br />dSafety Sheets from Acros Organics and Fisher Scientific (2; 18). <br />Table 2. Disappearance of Petroleum Hydrocarbons in Mixture of Organics <br />From Open Soil Microcosm. <br />Time t=0 t=2weeks t--4weeks <br />Weight of TPH 0. 24 g 0.015 g 0. 013 g <br />