
[Federal Register Volume 75, Number 235 (Wednesday, December 8, 2010)]
[Notices]
[Pages 76457-76460]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2010-30630]


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ENVIRONMENTAL PROTECTION AGENCY

[EPA-HQ-OPP-2010-0588; FRL-8854-5]


FIFRA Scientific Advisory Panel; Notice of Public Meeting

AGENCY: Environmental Protection Agency.

ACTION: Notice.

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SUMMARY: There will be a 4-day meeting of the Federal Insecticide, 
Fungicide, and Rodenticide Act Scientific Advisory Panel (FIFRA SAP) to 
consider and review the Chlorpyrifos Physiologically-Based 
Pharmacokinetic/Pharmacodynamic (PBPK/PD) Modeling linked to the 
Cumulative and Aggregate Risk Evaluation System (CARES).

DATES: The meeting will be held on February 15-18, 2011, from 9 a.m. to 
approximately 5:30 p.m.
    Comments. The Agency encourages that written comments be submitted 
by January 31, 2011 and requests for oral comments be submitted by 
February 8, 2011. However, written comments and requests to make oral 
comments may be submitted until the date of the meeting, but anyone 
submitting written comments after January 31, 2011 should contact the 
Designated Federal Official (DFO) listed under FOR FURTHER INFORMATION 
CONTACT. For additional instructions, see Unit I.C. of the 
SUPPLEMENTARY INFORMATION.
    Nominations. Nominations of candidates to serve as ad hoc members 
of FIFRA SAP for this meeting should be provided on or before December 
22, 2010.
    Webcast. This meeting may be webcast. Please refer to the FIFRA 
SAP's Web site, http://www.epa.gov/scipoly/SAP for information on how 
to access the webcast. Please note that the webcast is a supplementary 
public process provided only for convenience. If difficulties arise 
resulting in webcasting outages, the meeting will continue as planned.
    Special accommodations. For information on access or services for 
individuals with disabilities, and to request accommodation of a 
disability, please contact the DFO listed under FOR FURTHER INFORMATION 
CONTACT at least 10 days prior to the meeting to give EPA as much time 
as possible to process your request.

ADDRESSES: The meeting will be held at the Environmental Protection 
Agency, Conference Center, Lobby Level, One Potomac Yard (South Bldg.), 
2777 S. Crystal Dr., Arlington, VA 22202.
    Comments. Submit your comments, identified by docket identification 
(ID) number EPA-HQ-OPP-2010-0588, by one of the following methods:
     Federal eRulemaking Portal: http://www.regulations.gov. Follow the on-line instructions for submitting 
comments.
     Mail: Office of Pesticide Programs (OPP) Regulatory Public 
Docket (7502P), Environmental Protection Agency, 1200 Pennsylvania 
Ave., NW., Washington, DC 20460-0001.
     Delivery: OPP Regulatory Public Docket (7502P), 
Environmental Protection Agency, Rm. S-4400, One

[[Page 76458]]

Potomac Yard (South Bldg.), 2777 S. Crystal Dr., Arlington, VA. 
Deliveries are only accepted during the Docket Facility's normal hours 
of operation (8:30 a.m. to 4 p.m., Monday through Friday, excluding 
legal holidays). Special arrangements should be made for deliveries of 
boxed information. The Docket Facility telephone number is (703) 305-
5805.
    Instructions: Direct your comments to docket ID number EPA-HQ-OPP-
2010-0588. If your comments contain any information that you consider 
to be CBI or otherwise protected, please contact the DFO listed under 
FOR FURTHER INFORMATION CONTACT, to obtain special instructions before 
submitting your comments. EPA's policy is that all comments received 
will be included in the docket without change and may be made available 
on-line at http://www.regulations.gov, including any personal 
information provided, unless the comment includes information claimed 
to be Confidential Business Information (CBI) or other information 
whose disclosure is restricted by statute. Do not submit information 
that you consider to be CBI or otherwise protected through 
regulations.gov or e-mail. The regulations.gov Web site is an 
``anonymous access'' system, which means EPA will not know your 
identity or contact information unless you provide it in the body of 
your comment. If you send an e-mail comment directly to EPA without 
going through regulations.gov, your e-mail address will be 
automatically captured and included as part of the comment that is 
placed in the docket and made available on the Internet. If you submit 
an electronic comment, EPA recommends that you include your name and 
other contact information in the body of your comment and with any disk 
or CD-ROM you submit. If EPA cannot read your comment due to technical 
difficulties and cannot contact you for clarification, EPA may not be 
able to consider your comment. Electronic files should avoid the use of 
special characters, any form of encryption, and be free of any defects 
or viruses.
    Docket: All documents in the docket are listed in the docket index 
available at http://www.regulations.gov. Although, listed in the index, 
some information is not publicly available, e.g., CBI or other 
information whose disclosure is restricted by statute. Certain other 
material, such as copyrighted material, is not placed on the Internet 
and will be publicly available only in hard copy form. Publicly 
available docket materials are available either in the electronic 
docket at http://www.regulations.gov, or, if only available in hard 
copy, at the OPP Regulatory Public Docket in Rm. S-4400, One Potomac 
Yard (South Bldg.), 2777 S. Crystal Dr., Arlington, VA. The hours of 
operation of this Docket Facility are from 8:30 a.m. to 4 p.m., Monday 
through Friday, excluding legal holidays. The Docket Facility telephone 
number is (703) 305-5805.
    Nominations, requests to present oral comments, and requests for 
special accommodations. Submit nominations to serve as ad hoc members 
of FIFRA SAP, requests for special seating accommodations, or requests 
to present oral comments to the DFO listed under FOR FURTHER 
INFORMATION CONTACT.

FOR FURTHER INFORMATION CONTACT: Sharlene R. Matten, DFO, Office of 
Science Coordination and Policy (7201M), Environmental Protection 
Agency, 1200 Pennsylvania Ave., NW., Washington, DC 20460-0001; 
telephone number: (202) 564-0130; fax number: (202) 564-8382; e-mail 
address: matten.sharlene@epa.gov.

SUPPLEMENTARY INFORMATION: 

 I. General Information

 A. Does this action apply to me?

    This action is directed to the public in general. This action may, 
however, be of interest to persons who are or may be required to 
conduct testing of chemical substances under the Federal Food, Drug, 
and Cosmetic Act (FFDCA), FIFRA, and the Food Quality Protection Act of 
1996 (FQPA). Since other entities may also be interested, the Agency 
has not attempted to describe all the specific entities that may be 
affected by this action. If you have any questions regarding the 
applicability of this action to a particular entity, consult the DFO 
listed under FOR FURTHER INFORMATION CONTACT.

 B. What should I consider as I prepare my comments for EPA?

    When submitting comments, remember to:
    1. Identify the document by docket ID number and other identifying 
information (subject heading, Federal Register date and page number).
    2. Follow directions. The Agency may ask you to respond to specific 
questions or organize comments by referencing a Code of Federal 
Regulations (CFR) part or section number.
    3. Explain why you agree or disagree; suggest alternatives and 
substitute language for your requested changes.
    4. Describe any assumptions and provide any technical information 
and/or data that you used.
    5. If you estimate potential costs or burdens, explain how you 
arrived at your estimate in sufficient detail to allow for it to be 
reproduced.
    6. Provide specific examples to illustrate your concerns and 
suggest alternatives.
    7. Explain your views as clearly as possible, avoiding the use of 
profanity or personal threats.
    8. Make sure to submit your comments by the comment period deadline 
identified.

 C. How may I participate in this meeting?

    You may participate in this meeting by following the instructions 
in this unit. To ensure proper receipt by EPA, it is imperative that 
you identify docket ID number EPA-HQ-OPP-2010-0588 in the subject line 
on the first page of your request.
    1. Written comments. The Agency encourages that written comments be 
submitted, using the instructions in ADDRESSES, no later than January 
31, 2011, to provide FIFRA SAP the time necessary to consider and 
review the written comments. Written comments are accepted until the 
date of the meeting, but anyone submitting written comments after 
January 31, 2011, should contact the DFO listed under FOR FURTHER 
INFORMATION CONTACT. Anyone submitting written comments at the meeting 
should bring 30 copies for distribution to FIFRA SAP.
    2. Oral comments. The Agency encourages that each individual or 
group wishing to make brief oral comments to FIFRA SAP submit their 
request to the DFO listed under FOR FURTHER INFORMATION CONTACT no 
later than February 8, 2011, in order to be included on the meeting 
agenda. Requests to present oral comments will be accepted until the 
date of the meeting, and to the extent that time permits, the Chair of 
FIFRA SAP may permit the presentation of oral comments at the meeting 
by interested persons who have not previously requested time. The 
request should identify the name of the individual making the 
presentation, the organization (if any) the individual will represent, 
and any requirements for audiovisual equipment (e.g., overhead 
projector, 35 mm projector, chalkboard). Oral comments before FIFRA SAP 
are limited to approximately 5 minutes unless prior arrangements have 
been made. In addition, each speaker should bring 30 copies of his or 
her comments and presentation slides for distribution to the FIFRA SAP 
at the meeting.
    3. Seating at the meeting. Seating at the meeting will be open and 
on a first-come basis.

[[Page 76459]]

    4. Request for nominations to serve as ad hoc members of FIFRA SAP 
for this meeting. As part of a broader process for developing a pool of 
candidates for each meeting, FIFRA SAP staff routinely solicits the 
stakeholder community for nominations of prospective candidates for 
service as ad hoc members of FIFRA SAP. Any interested person or 
organization may nominate qualified individuals to be considered as 
prospective candidates for a specific meeting. Individuals nominated 
for this meeting should have expertise in one or more of the following 
areas: Risk assessment, organophosphate pesticides, cholinesterase 
inhibition, data-derived uncertainty factors (also referred to as 
chemical-specific adjustment factors), pharmacodynamic modeling, 
physiologically-based pharmacokinetic modeling, biomonitoring data, 
statistical modeling, probabilistic techniques, and dietary exposure to 
pesticides. Nominees should be scientists who have sufficient 
professional qualifications, including training and experience, to be 
capable of providing expert comments on the scientific issues for this 
meeting. Nominees should be identified by name, occupation, position, 
address, and telephone number. Nominations should be provided to the 
DFO listed under FOR FURTHER INFORMATION CONTACT on, or, before 
December 22, 2010. The Agency will consider all nominations of 
prospective candidates for this meeting that are received on or before 
this date. However, final selection of ad hoc members for this meeting 
is a discretionary function of the Agency.
    The selection of scientists to serve on FIFRA SAP is based on the 
function of the panel and the expertise needed to address the Agency's 
charge to the panel. No interested scientists shall be ineligible to 
serve by reason of their membership on any other advisory committee to 
a Federal department or agency or their employment by a Federal 
department or agency except the EPA. Other factors considered during 
the selection process include availability of the potential panel 
member to fully participate in the panel's reviews, absence of any 
conflicts of interest or appearance of lack of impartiality, 
independence with respect to the matters under review, and lack of 
bias. Although, financial conflicts of interest, the appearance of lack 
of impartiality, lack of independence, and bias may result in 
disqualification, the absence of such concerns does not assure that a 
candidate will be selected to serve on FIFRA SAP. Numerous qualified 
candidates are identified for each panel. Therefore, selection 
decisions involve carefully weighing a number of factors including the 
candidates' areas of expertise and professional qualifications and 
achieving an overall balance of different scientific perspectives on 
the panel. In order to have the collective breadth of experience needed 
to address the Agency's charge for this meeting, the Agency anticipates 
selecting approximately 10-15 ad hoc scientists.
    FIFRA SAP members are subject to the provisions of 5 CFR part 2634, 
Executive Branch Financial Disclosure, as supplemented by EPA in 5 CFR 
part 6401. In anticipation of this requirement, prospective candidates 
for service on the FIFRA SAP will be asked to submit confidential 
financial information which shall fully disclose, among other financial 
interests, the candidate's employment, stocks and bonds, and where 
applicable, sources of research support. EPA will evaluate the 
candidates financial disclosure form to assess whether there are 
financial conflicts of interest, appearance of a lack of impartiality 
or any prior involvement with the development of the documents under 
consideration (including previous scientific peer review) before the 
candidate is considered further for service on FIFRA SAP. Those who are 
selected from the pool of prospective candidates will be asked to 
attend the public meetings and to participate in the discussion of key 
issues and assumptions at these meetings. In addition, they will be 
asked to review and to help finalize the meeting minutes. The list of 
FIFRA SAP members participating at this meeting will be posted on the 
FIFRA SAP Web site at http://epa.gov/scipoly/sap, or may be obtained 
from the OPP Regulatory Public Docket at http://www.regulations.gov.

 II. Background

 A. Purpose of FIFRA SAP

    FIFRA SAP serves as the primary scientific peer review mechanism of 
EPA's Office of Chemical Safety and Pollution Prevention (OCSPP) and is 
structured to provide scientific advice, information and 
recommendations to the EPA Administrator on pesticides and pesticide-
related issues as to the impact of regulatory actions on health and the 
environment. FIFRA SAP is a Federal advisory committee established in 
1975 under FIFRA that operates in accordance with requirements of the 
Federal Advisory Committee Act. FIFRA SAP is composed of a permanent 
panel consisting of seven members who are appointed by the EPA 
Administrator from nominees provided by the National Institutes of 
Health and the National Science Foundation. FIFRA, as amended by the 
Food Quality Protection Act of 1996 (FQPA), established a Science 
Review Board consisting of at least 60 scientists who are available to 
the SAP on an ad hoc basis to assist in reviews conducted by the SAP. 
As a peer review mechanism, FIFRA SAP provides comments, evaluations 
and recommendations to improve the effectiveness and quality of 
analyses made by Agency scientists. Members of FIFRA SAP are scientists 
who have sufficient professional qualifications, including training and 
experience, to provide expert advice and recommendation to the Agency.

 B. Public Meeting

    Chlorpyrifos (0,0-diethyl-0-3,5,6-trichloro-2-pyridyl 
phosphorothioate) is a broad-spectrum, chlorinated organophosphate (OP) 
insecticide. In 2000, nearly all residential uses were voluntarily 
cancelled by Dow AgroSciences, but agricultural uses remain. The 2000 
human health risk assessment was largely based on adult laboratory 
animal data (rat or dog) for cholinesterase inhibition and the 
application of default uncertainty factors to address inter- and intra-
species differences including susceptible populations. Currently, the 
Agency is developing a new human health risk assessment expected to be 
released in 2011. In 2008, the FIFRA Scientific Advisory Panel (SAP) 
reviewed a draft science issue paper on the human health effects of 
chlorpyrifos. Since that time, Dow AgroSciences has undergone a 
research effort to improve the existing physiologically-based 
pharmacokinetic/pharmacodynamic model (PBPK/PD) developed by Dr. 
Charles Timchalk and co-workers at Pacific Northwest National 
Laboratory. Dow AgroSciences has also developed a proposed approach for 
merging this PBPK/PD model with CARES Cumulative and Aggregate Risk 
Evaluation System, see http://www.ilsi.org/ResearchFoundation/Pages/CARES.aspx, a publically-available probabilistic exposure model. The 
purpose of the February 2011 SAP meeting will be to review the PBPK/PD 
model and to evaluate the proposed approach for linking this PBPK model 
to the probabilistic exposure model.
    The linking of the chlorpyrifos PBPK/PD model with a probabilistic 
exposure model may provide opportunities to calculate distributions of 
exposure to chlorpyrifos and its metabolites with cholinesterase 
inhibition levels across the U.S. population. In addition, this

[[Page 76460]]

approach may allow estimation of data-derived uncertainty factors that 
consider use of toxicokinetic and toxicodynamic data to inform 
quantitative extrapolations for interspecies differences and human 
variability in dose response assessment. The topics to be covered in 
the February 2011 SAP are consistent with EPA's Office of Pesticide 
Programs continuing efforts to improve the scientific basis for risk 
assessment by broadening the application of probabilistic exposure 
techniques and PBPK models. The Agency has a conceptually similar 
effort on-going to link PBPK models for pyrethroids with Stochastic 
Human Exposure and Dose Simulator (SHEDS) exposure software, a 
probabilistic exposure model developed by the EPA's Office of Research 
and Development, which was reviewed by the SAP in July 2010. The 
current effort by Dow AgroSciences is a research effort which may, if 
sufficiently robust, inform future risk assessments; the February 
meeting is a key milestone in this research. The Agency will solicit 
feedback from the Panel on technical issues related to PBPK/PD model, 
the proposed approach for merging the PBPK/PD model with CARES, and the 
use of such merged models in risk assessment.

C. FIFRA SAP Documents and Meeting Minutes

    EPA's background paper, related supporting materials, charge/
questions to FIFRA SAP, FIFRA SAP composition (i.e., members and ad hoc 
members for this meeting), and the meeting agenda will be available by 
late January 2011. In addition, the Agency may provide additional 
background documents as the materials become available. You may obtain 
electronic copies of these documents, and certain other related 
documents that might be available electronically, at http://www.regulations.gov and the FIFRA SAP homepage at http://www.epa.gov/
scipoly/sap.
    FIFRA SAP will prepare meeting minutes summarizing its 
recommendations to the Agency approximately 90 days after the meeting. 
The meeting minutes will be posted on the FIFRA SAP Web site or may be 
obtained from the OPP Regulatory Public Docket at http://www.regulations.gov.

List of Subjects

    Environmental protection, Pesticides and pests.

    Dated: November 23, 2010.
Frank Sanders,
Director, Office of Science Coordination and Policy.
[FR Doc. 2010-30630 Filed 12-7-10; 8:45 am]
BILLING CODE 6560-50-P


