
[Federal Register: April 16, 2008 (Volume 73, Number 74)]
[Notices]               
[Page 20636-20638]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr16ap08-52]                         

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ENVIRONMENTAL PROTECTION AGENCY

[EPA-HQ-OPPT-2008-0026; FRL-8353-4]

 
National Advisory Committee for Acute Exposure Guideline Levels 
for Hazardous Substances; Proposed AEGL Values; Notice of Availability

AGENCY: Environmental Protection Agency (EPA).

ACTION: Notice.

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SUMMARY: The National Advisory Committee for Acute Exposure Guideline 
Levels (AEGLs) for Hazardous Substances (NAC/AEGL Committee) is 
developing AEGLs values on an ongoing basis to provide Federal, State, 
and local agencies with information on short-term exposures to 
hazardous chemicals. This notice provides a list of 62 hazardous 
chemicals for proposed AEGL values that are available for public review 
and comment. Comments are welcome on both the proposed AEGL values and 
the Technical Support Documents placed in the public version of the 
official docket.

DATES: Comments must be received on or before May 16, 2008.

ADDRESSES: Submit your comments, identified by docket identification 
(ID) number EPA-HQ-OPPT-2008-0026, by one of the following methods:
     Federal eRulemaking Portal: http://www.regulations.gov. 
Follow the on-line instructions for submitting comments.
     Mail: Document Control Office (7407M), Office of Pollution 
Prevention and Toxics (OPPT), Environmental Protection Agency, 1200 
Pennsylvania Ave., NW., Washington, DC 20460-0001.
     Hand Delivery: OPPT Document Control Office (DCO), EPA 
East Bldg., Rm. 6428, 1201 Constitution Ave., NW., Washington, DC. 
Attention: Docket ID Number EPA-HQ-OPPT-2008-0026. The DCO is open from 
8 a.m. to 4 p.m., Monday through Friday, excluding legal holidays. The 
telephone number for the DCO is (202) 564-8930. Such deliveries are 
only accepted during the DCO's normal hours of operation, and special 
arrangements should be made for deliveries of boxed information.
    Instructions: Direct your comments to docket ID number EPA-HQ-OPPT-
2008-0026. 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 website 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. For additional 
information about EPA's public docket, visit the EPA Docket Center 
homepage at http://www.epa.gov/epahome/dockets.htm.
    Docket: All documents in the docket are listed in the docket index 
available in regulations.gov. To access the electronic docket, go to 
http://www.regulations.gov, select ``Advanced Search,'' then ``Docket 
Search.'' Insert the docket ID number where indicated and select the 
``Submit'' button. Follow the instructions on the regulations.gov 
website to view the docket index or access available documents. 
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, will be publicly available only in hard copy. Publicly 
available docket materials are available electronically at

[[Page 20637]]

http://www.regulations.gov, or, if only available in hard copy, at the 
OPPT Docket. The OPPT Docket is located in the EPA Docket Center (EPA/
DC) at Rm. 3334, EPA West Bldg., 1301 Constitution Ave., NW., 
Washington, DC. The EPA/DC Public Reading Room hours of operation are 
8:30 a.m. to 4:30 p.m., Monday through Friday, excluding Federal 
holidays. The telephone number of the EPA/DC Public Reading Room is 
(202) 566-1744, and the telephone number for the OPPT Docket is (202) 
566-0280. Docket visitors are required to show photographic 
identification, pass through a metal detector, and sign the EPA visitor 
log. All visitor bags are processed through an X-ray machine and 
subject to search. Visitors will be provided an EPA/DC badge that must 
be visible at all times in the building and returned upon departure.

FOR FURTHER INFORMATION CONTACT: For general information contact: Colby 
Lintner, Regulatory Coordinator, Environmental Assistance Division 
(7408M), Office of Pollution Prevention and Toxics, Environmental 
Protection Agency, 1200 Pennsylvania Ave., NW., Washington, DC 20460-
0001; telephone number: (202) 554-1404; e-mail address: TSCA-
Hotline@epa.gov.
    For technical information contact: Paul S. Tobin, Designated 
Federal Officer (DFO), Office of Pollution Prevention and Toxics 
(7403M), Office of Pollution Prevention and Toxics , Environmental 
Protection Agency, 1200 Pennsylvania Ave., NW., Washington, DC 20460-
0001; telephone number: (202) 564-8557; e-mail address: 
tobin.paul@epa.gov.

SUPPLEMENTARY INFORMATION:

I. General Information

A. Does this Action Apply to Me?

    This action is directed to the general public to provide an 
opportunity for review and comment on proposed AEGL values and their 
supporting scientific rationale. This action may be of particular 
interest to anyone who may be affected if the AEGL values are adopted 
by government agencies for emergency planning, prevention, or response 
programs, such as EPAs Risk Management Program under the Clean Air Act 
and Amendments Section 112r. It is possible that other Federal agencies 
besides EPA, as well as State and local agencies and private 
organizations, may adopt the AEGL values for their programs. As such, 
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?

    1. Submitting CBI. Do not submit this information to EPA through 
regulations.gov or e-mail. Clearly mark the part or all of the 
information that you claim to be CBI. For CBI information in a disk or 
CD-ROM that you mail to EPA, mark the outside of the disk or CD-ROM 
that you mail to EPA, mark the outside of the disk or CD-ROM as CBI and 
then identify electronically within the disk or CD-ROM the specific 
information that is claimed as CBI. In addition to one complete version 
of the comment that includes information claimed as CBI, a copy of the 
comment that does not contain the information claimed as CBI must be 
submitted for inclusion in the public docket. Information so marked 
will not be disclosed except in accordance with procedures set forth in 
40 CFR part 2.
    2. Tips for preparing your comments. When submitting comments, 
remember to:
    i. Identify the document by docket ID number and other identifying 
information (subject heading, Federal Register date and page number).
    ii. 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.
    iii. Explain why you agree or disagree; suggest alternatives and 
substitute language for your requested changes.
    iv. Describe any assumptions and provide any technical information 
and/or data that you used.
    v. If you estimate potential costs or burdens, explain how you 
arrived at your estimate in sufficient detail to allow for it to be 
reproduced.
    vi. Provide specific examples to illustrate your concerns and 
suggest alternatives.
    vii. Explain your views as clearly as possible, avoiding the use of 
profanity or personal threats.
    viii. Make sure to submit your comments by the comment period 
deadline identified.

II. What Action is the Agency Taking?

    EPA's Office of Prevention, Pesticides and Toxic Substances (OPPTS) 
provided notice in the Federal Register of October 31, 1995 (60 FR 
55376) (FRL-4987-3) of the establishment of the NAC/AEGL Committee with 
the stated charter objective as ``the efficient and effective 
development of AEGLs and the preparation of supplementary qualitative 
information on the hazardous substances for Federal, State, and Local 
agencies and organizations in the private sector concerned with 
[chemical] emergency planning, prevention, and response.'' The NAC/AEGL 
Committee is a discretionary Federal advisory committee formed with the 
intent to develop AEGL values for hazardous chemicals through the 
combined efforts of stakeholder members from both the public and 
private sectors in a cost-effective approach that avoids duplication of 
efforts and provides uniform values, while employing the most 
scientifically sound methods available.
    This action provides notice of availability, for public review and 
comment, of proposed AEGL values and underlying supporting documents 
for 62 hazardous chemicals. These AEGL values represent the 11\th\ set 
of exposure levels proposed and published by the NAC/AEGL Committee. 
These 11 sets of AEGL values cover 239 hazardous chemicals. Background 
information on the AEGL Program may be found in the earlier Federal 
Register notices available in regulations.gov or on the AEGL website 
(http://www.epa.gov/oppt/aegl).
    Following public review and comment, the NAC/AEGL Committee will 
reconvene to consider relevant comments, data, and information that may 
have an impact on the NAC/AEGL Committee's position and will again seek 
consensus for the establishment of interim AEGL values. Although the 
interim AEGL values will be available to Federal, State, and local 
agencies and to organizations in the private sector as biological 
reference values, it is intended to have them reviewed by a 
subcommittee of the National Academies (NAS). The NAS subcommittee will 
serve as a peer review of the interim AEGL values and as the final 
arbiter in the resolution of issues regarding the AEGL values, and the 
data and basic methodology used for setting AEGL values. Following 
concurrence, final AEGL values will be published under the auspices of 
NAS.

III. List of Chemicals

    On behalf of the NAC/AEGL Committee, EPA is providing an 
opportunity for public comment on the proposed AEGL values for the 62 
hazardous chemicals identified in the table in this unit. Technical 
Support Documents and key references may be obtained in the Docket 
described under ADDRESSES.


[[Page 20638]]



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               Chemical Name                          CAS Number
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1,2-Dibromoethane                           106-93-4
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2-Ethylhexyl chloroformate                  24468-13-1
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Acrylonitrile                               107-13-1
------------------------------------------------------------------------
Allyl chloride                              107-05-1
------------------------------------------------------------------------
Allyl chloroformate                         2937-50-0
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Allyl trichlorosilane                       107-37-9
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Amyl trichlorosilane                        107-72-2
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Benzyl chloroformate                        501-53-1
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Boron tribromide                            10294-33-4
------------------------------------------------------------------------
Bromine chloride                            13863-41-7
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Butyl trichlorosilane                       7521-80-4
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BZ (3-quinuclidinyl benzilate)              6581-06-2
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Carbonyl fluoride                           353-50-4
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Carbonyl sulfide                            463-58-1
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Chlorobenzene                               108-90-7
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Chloromethyltrichlorosilane                 1558-25-4
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Chloropicrin                                76-06-2
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Chlorosulfonic acid                         7790-94-5
------------------------------------------------------------------------
Chlorotrifluroethylene                      79-38-9
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Dichlorosilane                              4109-96-0
------------------------------------------------------------------------
Diethyldichlorosilane                       1719-53-5
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Diketene                                    674-82-8
------------------------------------------------------------------------
Dimethylamine                               124-40-3
------------------------------------------------------------------------
Dimethylchlorosilane                        1066-35-9
------------------------------------------------------------------------
Diphenyldichlorosilane                      80-10-4
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Docecyltrichlorosilane                      4484-72-4
------------------------------------------------------------------------
Ethyl chloroformate                         541-41-3
------------------------------------------------------------------------
Ethyl chlorothioformate                     2941-64-2
------------------------------------------------------------------------
Ethylamine                                  75-04-7
------------------------------------------------------------------------
Ethylene chlorohydrin                       107-07-3
------------------------------------------------------------------------
Ethyltrichlorosilane                        115-21-9
------------------------------------------------------------------------
Hexyltrichlorosilane                        928-65-4
------------------------------------------------------------------------
Isobutyl chloroformate                      543-27-1
------------------------------------------------------------------------
Isopropyl chloroformate                     108-23-6
------------------------------------------------------------------------
Methacrylaldehyde                           78-85-3
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Methanesulfonyl chloride                    124-63-0
------------------------------------------------------------------------
Methyl amine                                74-89-5
------------------------------------------------------------------------
Methyl chloroformate                        79-22-1
------------------------------------------------------------------------
Methyl vinyl ketone                         78-94-4
------------------------------------------------------------------------
Methylvinyldichlorosilane                   124-70-9
------------------------------------------------------------------------
n-Butyl chloroformate                       592-34-7
------------------------------------------------------------------------
Nonyltrichlorosilane                        5283-67-0
------------------------------------------------------------------------
Octadecyltrichlorosilane                    112-04-9
------------------------------------------------------------------------
Octyltrichlorosilane                        5283-66-9
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Osmium tetroxide                            20816-12-0
------------------------------------------------------------------------
Oxygen difluoride                           7783-41-7
------------------------------------------------------------------------
Pentaborane                                 19624-22-7
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Phenyl chloroformate                        1885-14-9
------------------------------------------------------------------------
Propyl chloroformate                        109-61-5
------------------------------------------------------------------------
Propyltrichlorosilane                       141-57-1
------------------------------------------------------------------------
sec-Butyl chloroformate                     17462-58-7
------------------------------------------------------------------------
Silicon tetrachloride                       10026-04-7
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Silicon tetrafluoride                       7783-61-1
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Stibine (Antimony hydride)                  7803-52-3
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Sulfuryl fluoride                           2699-79-8
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Tetrafluoroethylene                         116-14-3
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Thionyl chloride                            7719-09-7
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Trichloro(dichlorophenyl)silane             27137-85-5
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Trichlorophenylsilane                       98-13-5
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Trichlorosilane                             10025-78-2
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Trimethylamine                              75-50-3
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Vinyltrichlorosilane                        75-94-5
------------------------------------------------------------------------
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List of Subjects

    Environmental protection, Acute Exposure Guideline Levels, 
Hazardous substances.


    Dated: April 10, 2008.
James B. Gulliford,
Assistant Administrator, Office of Prevention, Pesticides and Toxic 
Substances.
[FR Doc. E8-8184 Filed 4-15-08; 8:45 am]

BILLING CODE 6560-50-S
