Document jn5J76700K74Ze8EDKMbOvyO

March 23, 1987 DRAFT Document Control Officer Information Management Division Office of Toxic Substances (WH-557) Environmental Protection Agency 401 M Street, SW Washington, DC 20460 Gentlemen: This notice is being submitted by Vista Chemical Company in accordance with Section 8(e) of the Toxic Substances Control Act. Vista Chemical has recently discovered a previously unsuspected extent of ethylene dichloride contamination (1,2 Dichloroethane, CAS No. 107-06-2) in the groundwater underneath it's vinyl chloride monomer manufacturing plant located in Westlake, Louisiana. A groundwater investigation is currently underway at the plant in accordance with a Louisiana Department of Environmental Quality (LDEQ) compliance order, dated March 31, 1986. On March 13, soil samples taken from a boring hole located on the western fence line of the plant property indicated levels of ethylene dichloride in the 0.3 - 1.0 ppm range. Subsequent water samples taken from that boring indicated EDC levels of approximately 0.3 ppm. These results indicate previously unknown lateral migration of contamination at the site. Vista is continuing to investigate potential off-site migration and potential for human exposure from the groundwater contamination in VVV 000001009 this aquifer. This information will be communicated to the LDEQ as part of the ongoing investigation. Please contact the undersigned at 713/531-3445 if you have questions regarding this report. Sincerely, Thomas G. Grumbles, C.I.H. Environmental Quality Manager aj o w. L. McClain R. T. Ferrell J . A. DeBernardi M. G. Hayes R. A. Conrad VVV 00000101