Document k9gzO898rrE4x62rQ9Gx67DLq

Vista Chemical Company 900 Threadneedle Houston, Texas 77079 (713) 588-3000 P.O. Box 1 9029 Houston, Texas 77224 Fax (713) 588-3236 April 12, 1990 VISTA Mr. Bruce Cotton Dusek-Campbell P. 0. Box 385 Belleville, Ontario K8N-5A5 Dear Bruce: Vista does not have additional information regarding the specific inhalation toxicity of Vista 1560L Specialty Alkylate. However, based on our knowledge of this specialty alkylate stream and data obtained on similar streams we believe the following to be true. This product has a very low toxic potential via the inhalation route. Further, this product has a very low vapor pressure and very high initial boiling point which results in little or no potential for the product to become or stay airborne in a manner that would result in significant exposure potential. It is difficult to run inhalation toxicity tests on this material due to it's physical and chemical properties. Please contact me at 713-588-3445 if you have further questions. Sincerely, Thomas G. Grumbles, C.I.H. Environmental Quality Manager dlj cc: R. Cooley-Saddlebrook VVV 000012880