	 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY

	WASHINGTON D.C., 20460

	OFFICE OF CHEMICAL SAFETY AND POLLUTION PREVENTION

									DP Barcode: 392449

									PC Code: 108800

										October 11, 2011

MEMORANDUM 

SUBJECT: 	Drinking Water Assessment for S-Metolachlor and its Degradates
Ethanesulfonic Acid (ESA) and Oxanilic Acid (OA) for Cilantro and Beet
and Garden Leaves

TO:		Sidney Jackson, Risk Manager Reviewer

		Barbara Madden, Risk Manager	

		Registration Division	

FROM:	Christopher M. Koper, Chemist

		Environmental Risk Branch I

		Environmental Fate and Effects Division

THRU:	Nancy Andrews, Branch Chief

Sujatha Sankula, Lead Biologist

		Environmental Risk Branch I

Environmental Fate and Effects Division (7507P)

A drinking water assessment was requested after a petition was submitted
by the Interregional Research Project Number 4 (IR-4) to establish
s-metolachlor tolerances for cilantro and beet and garden leaves.  These
proposed uses are looking to be added to the Dual Magnum( (EPA Reg. No.
100-816) label.  After further review, the maximum proposed single use
rate of 1.27 lb a.i./acre for beet and garden leaves is the same rate as
turnip greens previously assessed for this chemical.  Therefore, please
refer to the 22 April 2010 drinking water assessment (D368735) for a
summary of recommended surface and groundwater EDWCs for the human
dietary risk assessment for the parent s-metolachlor and its degradates
ESA and OA.  

If there are any questions concerning this matter, please contact Chris
Koper at 703.347.8065 or   HYPERLINK "mailto:koper.christopher@epa.gov" 
koper.christopher@epa.gov .

