|MEETING SITE HOME SCHEDULE AUTHOR INDEX SUBJECT INDEX PROGRAM # INDEX ITINERARY SIGNUP|
W11 AM Environmental Chemical Forensics
(JOH-1117-822088) Distinguishing Between Two Types of Aroclor 1254: Considerations for Environmental Forensics Investigations.
Johnson, G1, Hansen, L2, Hamilton, M3, Hermanson, M4, Horsak, R5, O'Keefe, P6, 1 University of Utah, Salt Lake City, UT, USA2 University of Illinois, Urbana, IL, USA3 Axys Analytical Services, Ltd., Sidney, BC, Canada4 University of Pennsylvania, Philadelphia, PA, USA5 3TM International, Inc., Houston, TX, USA6 NY State Dept. Health, Albany, NY, USA
ABSTRACT- Two distinct variants of Arolcor 1254 (A1254) were produced by Monsanto. The "typical" variant was produced through the early 1970s and accounts for the vast majority of A1254 production. It has been reported in the literature that the "late-production" variant was sold from 1974 through 1976. In this paper, we present information that pushes that estimated production start-date back to at least 1972. It may predate 1972, but if so, it is unlikely to have been produced before 1971 because its production was linked to the Aroclor 1016 production process which began that year. Late production A1254 is also notable because it has higher proportions of both coplanar (dioxin-like) PCBs and polychlorinated dibenzofurans, as compared to the more typical A1254 variant. The congener patterns of the two A1254 variants are distinct, and are readily recognizable when encountered in environmental media. While late-production A1254 accounts for a small percentage of total production, it can be and has been encountered in environmental forensics field investigations. We present a litigation related case study where the late-production variant was recognized in industrial site soils, residential soil, and tree bark.
Key words: Aroclor 1254, Polychlorinatd Biphenyls, Environmental Forensics
Internet Services provided by|
Allen Press, Inc. | 810 E. 10th St. | Lawrence, Kansas 66044 USA
e-mail email@example.com | Web www.allenpress.com
All content is Copyright © 2005 SETAC