UNITED STATES ENVIRONMENTAL PROTECTION AGENCY

		     WASHINGTON, D.C. 20460

							                                            	  OFFICE OF

				PREVENTION, PESTICIDES

	AND TOXIC SUBSTANCES

	

April 16, 2008

MEMORANDUM

SUBJECT:	Preliminary Risk Assessments to Support the Reregistration
Eligibility Decision (RED) Document for
Hexahydro-1,3,5-tris(2-hydroxyethyl)-s-triazine (HHT) (Case 3074) 

FROM:	Lance Wormell, Chemical Review Manager

		Regulatory Management Branch 2

Antimicrobials Division (7510P)

TO:		Public Docket EPA-HQ-OPP-2003-0250

	This document presents the Environmental Protection Agency’s (EPA or
“the Agency”) Case Overview and revised risk assessments for
reregistration Case 3074:
Hexahydro-1,3,5-tris(2-hydroxyethyl)-s-triazine or “HHT.”

Attachments

Attachment 1:

Hexahydro-1,3,5-tris(2-hydroxyethyl)-s-triazine (HHT).  Revised Human
Health and Ecological Effects Risk Assessments for the Reregistration
Eligibility Decision (RED) Document.  April 16, 2008.

Attachment 2: 

Occupational and Residential Exposure Chapter for
Hexahydro-1,3,5-tris(2-hydroxyethyl)-s-triazine (HHT) for the
Reregistration Eligibility Decision (RED) Document (Case 3074).  

Attachment 3: 

Dietary Risk Assessment for  HHT (Grotan) for the RED Process. February
12, 2008.

Attachment 4: 

Drinking Water Assessment  for HHT (Grotan) Reregistration Eligibility
Decision (RED) Process. January 30, 2008.

Attachment 5: 

Ecological Hazards Assessment for Grotan. January 2, 2008.

Attachment 6: 

Environmental Fate Assessment of HHT for RED. January 31, 2008.

Attachment 7: 

INCIDENT REPORTS ASSOCIATED WITH
Hexahydro-1,3,5-tris(2-Hydroxyethyl)-s-Triazine. January 29, 2008.

Attachment 8: 

Product Chemistry  Science Chapter of  HHT (Grotan). January 23, 2008.

Attachment 9: 

Hexahydro-1,3,5-tris(2-Hydroxyethyl)-s-Triazine:  Toxicology
Disciplinary Chapter for the Issuance of the Reregistration Eligibility
Decision (RED) Document. January 30, 2008.

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