Meeting Summary

EPA/MAATF Organic Arsenical Herbicides RED Meeting

February 13, 2007, 3:00 PM to 4:00 PM

Room S-12100, 2777 S. Crystal Drive, Arlington, VA 22202

Participants

MAATF: Charlie Grizzle (Grizzle Co.), Steven Lamm (CEOH), Roy Olson
(Drexel Chemical Co.), Sam Cohen (UNMC), Roger Jackson (KMG), Michal
Eldan (Luxembourg-Pamol), Lorenz Rhomberg (Gradient)

EPA: Jim Jones (Director, OPP), Rick Keigwin (BEAD), Steve Bradburry
(EFED), Tina Levine (HED), Debbie Edwards (SRRD), Jonathan Chen (AD),
Anna Lowit (HED), Vicki Dellarco (HED), Dirk Helder (SRRD), Margaret
Rice (SRRD), Lance Wormell (SRRD)

Summary

On February 13, 2007, the Office of Pesticide Programs (OPP) Office
Director and the Division Directors/team members from the Special Review
and Reregistration Division, Health Effects Division, Environmental Fate
and Effects Division, and Biologic and Economic Analysis Division met
with representatives from the MAA (Monomethyl Arsonic Acid) Research
Task Force (MAATF) to discuss the organic arsenical herbicides MSMA,
DSMA, CAMA, and cacodylic acid.  The MAATF presented a summary of recent
meetings held with EFED and BEAD and a review of inorganic arsenic
carcinogenicity which the MAATF believes demonstrates that the “risk
cup” for inorganic arsenic is not full.  The information presented was
recently submitted to EPA as part of the MAATF’s formal comments on
the RED as part of the comment period that closed on January 19, 2007. 
EPA will review all comments received and issue a formal response in the
future.  Cacodylic acid is used as a defoliant in cotton and lawn
renovation.  MSMA and DSMA are used for weed control in cotton and
ornamental/residential turf.  CAMA is used for weed control in
residential turf.  

