Laserfiche WebLink
08/16/96 FRI 16 49 FAX 916 366 7013 HLEINFELDER STOCKTON QD004 <br /> Chemical Summary Methyl-Tert-Butyl Ether- Microsoft Internet Explorer Page 4 of 13 <br /> Fina Oil 6 Chemical Big spring, TX 48 <br /> Global Octanes (Mitsui) Deer Park, TX 1, 188 <br /> Hill Petroleum (Phibro) Houston, TX 130 <br /> Kerr McGee Corpus Christi, TX 171 <br /> Lyondell Petrochemical Channelview, TX 285 <br /> Marathon Oil (USX) Detroit, MI 133a <br /> Robinson, IL 133a <br /> Mark west south Shore, KY 162 <br /> Mobil Beaumont, TX 240 <br /> Oxychem Chocolate Bayou, TX 190 <br /> Phillips Sweeny, TX 285 <br /> Star Enterprises <br /> (Texaco/Aramco) Convent, LA 190 <br /> Sun Refining <br /> 6 Marketing Co. Marcus Kook, PA 240 <br /> ' Texaco Port Neches, TX 950 <br /> Texas Petrochemicals <br /> Corp Houston, TX 2,090 <br /> Valero Refining Co_ Corpus Christi, TX 160 <br /> a - Estimated Combined capacity was reported for both locations listed <br /> Source Mannsville 1993 <br /> ' (Sack to TOCK <br /> III ENVIRONMENTAL FATE <br /> A. Environmental Release <br /> Environmental releases of MTBE may occur at industrial sites <br /> involved in the manufacture of MTBE or in the blending of MTBE <br /> with gasoline, during the storage, distribution and transfer of <br /> MTBE-blended gasoline, and from spills or leaks or fugitive <br /> emissions at automotive service stations Total annual industrial <br /> emissions of MTBE in the U.S .in 1992, as reported on the Toxics <br /> I Release Inventory, were 3 million pounds 2 8 million pounds to <br /> air, 100 thousand pounds to surface water, 68 thousand pounds to <br /> underground in)ection sites, and 288 pounds to land (TR192 1994) <br /> vapor emissions of MTBE from gasoline blended with MTBE may also <br /> contribute substantially to atmospheric levels (U.S EPA 1988a) <br /> The annual mean concentration of MTBE in the atmosphere in the <br /> United States during 1987-1988 was estimated to be <0 2 ppb (V S. <br /> EPA 1993b) MTBE has been detected in potable well water samples <br /> in several locations, maximum reported concentrations ranged from <br /> 20 micrograms/L to more than 200 mg/L (U S EPA 1993b) <br /> B Transport <br /> MTBE is highly volatile (vapor pressure 245 mm Hg, Henry's Law <br /> Constant 5 5 x 10-4 atm-m3/mole) , and would be expected to <br /> volatilize rapidly from soil surfaces or water (U S EPA, 1993) <br /> Calculations based on the environmental partitioning model <br /> (ENPART) in the Graphical Exposure Modeling System (GEMS) indicate <br /> that 99 99% of MTBE will partition to air (U S. EPA 1993a) <br /> However, MTBE leaking from underground gasoline storage tanks may <br /> not readily reach the atmosphere With estimated organic carbon <br /> partitioning coefficients (Koc) of 12 3 (derived from water <br /> solubility data) and 10 96 (derived from. Kow data) (U S EPA <br /> 1993a) , MTBE is expected to be highly mobile in soils, and leaching <br /> of the chemical into groundwater is likely (U S EPA 1993x) <br /> C Transformation/Persistence <br /> Friday, August 16, 1996 4 25 PM <br /> 1 <br />