UNITED STATES ENVIRONMENTAL PROTECTION AGENCY

WASHINGTON, D.C. 20460

 OFFICE OF

PREVENTION, PESTICIDES

AND TOXIC SUBSTANCES

	

MEMORANDUM

Date/Time: 	September 22, 2016 / 9:00 a.m. – 11:00 a.m.

Subject: 	Office of Pesticide Programs Meeting with Syngenta on EPA's
Draft Ecological Risk Assessment for Atrazine

From: 		Marianne A. Mannix, Chemical Review Manager

Re-evaluation Management and Implementation Branch III

Pesticide Re-evaluation Division (7508P)

Participants:  EPA: Avivah Jakob, Frank Farruggia, Elizabeth Donovan,
Jim Cowles, Kimberly Nesci, Anita Pease, Rosanna Louie-Juzwiak, Kris
Garber, Collen Rossmeisl, Rick Keigwin, James Hetrick, Dana Spatz, Jack
Housenger

	Syngenta: Janis McFarland, Dan Campbell, Wenlin Chen, Richard Brain,
Jerry Wells, Mark White 

Waterborne Environmental: Daniel Perkins

Weed Science Society of America: Michael Barnett

Baylor: Ryan King

Meeting Summary:

At the request of Syngenta (a technical registrant of atrazine), the
Environmental Protection Agency’s (EPA) Office of Pesticide Programs
(OPP) met with Syngenta on September 22, 2016 to discuss several issues
and concerns the registrant has identified while reviewing the Refined
Ecological Risk Assessment for Atrazine. The draft atrazine ecological
risk assessment was posted in the atrazine registration review docket
for public comment on June 6, 2016 and the comment period is scheduled
to end on October 5, 2016.  Topics of discussion included registrant
proposed refinements to the avian assessment, registrant data quality
concerns for a fish reproduction study used in risk quotient
calculations, registrant concerns related to EPA's review of cosm
studies used to derive the concentration equivalent level of concern
(CELOC), some irregularities found in the water monitoring database, the
methodology used for calculating maximum 60-day averages, and a
comparison of modeling versus monitoring results.  Syngenta was
encouraged by EPA to submit their comments to the atrazine registration
review docket so that they may be considered along with the entirety of
public comments received before the draft ecological risk assessment is
updated. The risk assessment can be found in the atrazine registration
review docket on regulations.gov (Docket ID: EPA-HQ-OPP-2013-0266-0315).

