[Federal Register Volume 76, Number 164 (Wednesday, August 24, 2011)]
[Pages 52945-52946]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2011-21677]



[EPA-HQ-OPP-2008-0850; FRL-8886-6]

Chlorpyrifos Registration Review; Preliminary Human Health Risk 
Assessment; Extension of Comment Period

AGENCY: Environmental Protection Agency (EPA).

ACTION: Notice; Extension of comment period.


[[Page 52946]]

SUMMARY: EPA issued a notice in the Federal Register of Wednesday, July 
6, 2011, concerning the availability of the chlorpyrifos registration 
review; preliminary human health risk assessment. This document extends 
the comment period for 30 days, from Tuesday, September 6, 2011 to 
Thursday, October 6, 2011.

DATES: Comments, identified by docket identification (ID) number EPA-
HQ-OPP-2008-0850, must be received on or before Thursday, October 6, 

ADDRESSES: Follow the detailed instructions as provided under ADDRESSES 
in the Federal Register document of Wednesday, July 6, 2011.

FOR FURTHER INFORMATION CONTACT: Tom Myers, Pesticide Re-evaluation 
Division, Office of Pesticide Programs, Environmental Protection 
Agency, 1200 Pennsylvania Ave., NW., Washington, DC 20460-0001; 
telephone number: (703) 308-8589; e-mail address: [email protected].

SUPPLEMENTARY INFORMATION: This document extends the public comment 
period for the chlorpyrifos reregistration review, preliminary human 
health risk assessment, established in the Federal Register of 
Wednesday, July 6, 2011 (76 FR 39399) (FRL-8878-9). The document 
announced the availability of the human health assessment, along with 
all supporting documents, and commenced a 60-day public comment period 
that would end on September 6, 2011.
    This preliminary assessment incorporates new information that was 
not available at the time of the last assessment in 2000. Since 2000, 
several Scientific Advisory Panels have been held specifically on 
chlorpyrifos and some of the Agency's science policies and methods have 
changed. Based on the extant data and assumptions made in the 
preliminary assessment, risks have been preliminarily identified for 
drinking water, handlers, and residential bystanders. A Reader's Guide 
accompanied the preliminary human health assessment that detailed some 
of these exposure assumptions and remaining evaluations needed on the 
hazard assessment.
    As of early August, eight comments have been submitted to the EPA 
docket requesting a 60-day extension of the comment period based on the 
complex scientific issues and precedent setting policy applications. 
The submitters are Dow AgroSciences, Gharda Chemicals Limited, 
Agricultural Retailers Association, California Citrus Mutual, 
California Grape and Tree Fruit League, Oregonians for Food and 
Shelter, CropLife America and the Washington Friends of Farms and 
    In recognition of the complex, robust scientific database and 
mechanistic studies available for chlorpyrifos, the Agency will extend 
the public comment period by 30 days to end on October 6, 2011. 
Subsequent to this public comment period, the Agency will be revising 
the human health assessment based on a full weight of the evidence 
evaluation of all available data, and consideration of all comments 
received during the comment period as well as any additional 
information received on the health and exposure analyses. EPA is hereby 
extending the comment period, which was set to end on Tuesday, 
September 6, 2011, to Thursday, October 6, 2011.
    To submit comments, or access the docket, please follow the 
detailed instructions as provided under ADDRESSES in the Wednesday, 
July 6, 2011 Federal Register document. If you have questions, consult 
the person listed under FOR FURTHER INFORMATION CONTACT.

List of Subjects

    Environmental protection, chlorpyrifos, pesticides, and pests.

    Dated: August 18, 2011.
Peter Caulkins,
Acting Director, Pesticide Re-evaluation Division, Office of Pesticides 
[FR Doc. 2011-21677 Filed 8-23-11; 8:45 am]