Document ZnD88pkDknnBgvZyxJpZynbXd

AGENDA VISTA CHEMICAL COMPANY AND MDEQ AIR PERMIT MEETING FEBRUARY 12, 1991 1:30 PM - 3:30 PM Attendees: R. W. Seymour J. C. Ledvlna R. B. Newton F. G. Jeanson J. R. Ganc Bill Smith Peter Voytek Dwight Wiley Connie Simmons Jay Barkley Don Watts J. Dewayne Headrick Hevidar Abrawi Plant Manager; Aberdeen, Miss. Director of Environmental Quality; Vista, Houston Chief Process Engineer; Aberdeen, Miss. Senior Environmental Coordinator; Aberdeen, Miss. Process Engineer; Aberdeen, Miss. Vista Legal Counsel; Jackson, Miss. Clement International Chief Air Quality Division; MDEQ MDEQ MDEQ MDEQ MDEQ MDEQ VAB.0001166645 Topic Person 1 Review of Permit Application Actions to Date 1 and Status I Discussion of Unit Risk Factors (ug/m3)"1 I A. Choices: 4.2xl0"5, 1.61xl0"5 I 4. lxlO"6, 2.72xl0"6 fl B. Vista believes that 2.72xl0~6 is the I correct unit risk factor. 1) 4.2xl0"5 and 4.1xl0"6 are incorrectly calculated. Incorrect conversion I factors were used. I 2) The study that provides the 4.2xl0"5 I (1.61xl0~5 when corrected) Unit risk factor is not scientifically valid. I a. Data is for oral ingestion not I inhalation. I b. Data from two different studies was I used. No proof that the two study's 1 can be treated the same. 1 c. Not all data from the two studies was I used. 1 1 d. Study did not have adequate peer | review. I 3) EPA's Cancer Risk Assessment group's I opinion based on discussions with Peter Voytek. I 4) Vinyl Institute work with LDEQ. F. Jeanson P. Voytek P. Voytek P. Voytek J. Ledvina Vista's Data 1 A. Fenceline and residential concentrations | plot based on modeling data. F. Jeanson I B. Inhalation risk assessment work by Lape I of Clement International. F. Jeanson 1 C. Sara 313 data for 1989.__________________________ F. Jeanson I New Air Permit I Vista proposes | 420 ppm daily average 380 ppm monthly average Time 15 I 20 20 10 1 10 5 15 1 5 20 mm I VAB.0001166646