

[Federal Register: September 19, 2007 (Volume 72, Number 181)]
[Notices]               
[Page 53577-53579]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr19se07-81]                         

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ENVIRONMENTAL PROTECTION AGENCY

[EPA-HQ-OPPT-2006-0832; FRL-8132-6]

 
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 on an ongoing basis to provide Federal, State, and 
local agencies with information on short-term exposures to hazardous 
substances. This notice provides a list of 37 hazardous substances for 
Proposed AEGL values, which are available for public review and 
comment. Comments are welcome on both the Proposed AEGL values and the 
Technical Support Documents in the public docket.

DATES: Comments must be received on or before October 19, 2007.

ADDRESSES: Submit your comments, identified by docket identification 
(ID) number EPA-HQ-OPPT-2006-0832, 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-2006-0832. 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-
2006-0832. 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 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

[[Page 53578]]

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 
(7406M), 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 EPA's 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) 
published in the Federal Register of October 31, 1995 (Ref. 1) a notice 
establishing the NAC/AEGL Committee with the stated charter objective 
of ``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 AEGLs for 
hazardous substances 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 37 hazardous substances. These values represent the 10\th\ set of 
exposure levels proposed and published by the NAC/AEGL Committee. For 
the previous 9 Federal Register notices (Refs. 2-10) that proposed 
AEGLs values for 140 hazardous substances, see Unit IV. These 9 Federal 
Register notices were published to provide an opportunity for public 
review and comment. Background information on the AEGL Program may be 
found in these earlier Federal Register notices 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 (NA). The NA 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 
NA.

III. List of Hazardous Substances

    On behalf of the NAC/AEGL Committee, EPA is providing an 
opportunity for public comment on the Proposed AEGL values for the 37 
hazardous substances identified in the table in this unit. Technical 
Support Documents and key literature references are in the public 
docket.

                 Proposed AEGL Hazardous Substances Table
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         Hazardous Substances Name                   CAS Number
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1,2,3-trimethylbenzene                      526-73-8
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1,2,4-trimethylbenzene                      95-63-6
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1,3,5-trimethylbenzene                      108-67-8
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[[Page 53579]]


Adamsite                                    578-94-9
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Aluminum phosphide                          20859-73-8
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Arsenic trioxide                            1327-53-3
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Biphenyl                                    92-52-4
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bis-Chloromethyl ether                      542-88-1
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Calcium phosphide                           1305-99-3
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Cyclohexyl isocyanate                       3173-53-3
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Diphenylchloroarsine                        712-48-1
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Ethyldichloroarsine                         598-14-1
------------------------------------------------------------------------
Hexafluoroacetone                           684-16-2
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Hexafluoropropylene                         116-15-4
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Ketene                                      463-51-4
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Magnesium aluminum phosphide                None
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Magnesium phosphide                         12057-74-8
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Methyl chlorosilane                         993-00-0
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Methyl dichlorosilane                       75-54-7
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Methyl t-butyl ether                        1634-04-4
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Methyldichloroarsine                        593-89-5
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Nitrogen mustard HN-1 bis(2-                538-07-8
 chloroethyl)ethylamine
------------------------------------------------------------------------
Nitrogen mustard HN-2 bis(2-                51-75-2
 chloroethyl)methyl amine
------------------------------------------------------------------------
Nitrogen mustard HN-3 tris(2-               555-77-1
 chloroethyl)amine
------------------------------------------------------------------------
Phenyldichloroarsine                        696-28-6
------------------------------------------------------------------------
Phenylmercaptan                             108-98-5
------------------------------------------------------------------------
Potassium phosphide                         20770-41-6
------------------------------------------------------------------------
Propargyl alcohol                           107-19-7
------------------------------------------------------------------------
Selenium hexafluoride                       7783-79-1
------------------------------------------------------------------------
Silane                                      7803-62-5
------------------------------------------------------------------------
Sodium phosphide                            12058-85-4
------------------------------------------------------------------------
Strontium phosphide                         12504-13-1
------------------------------------------------------------------------
Sulfuryl chloride                           7791-25-5
------------------------------------------------------------------------
Tetramethoxy silane                         681-84-5
------------------------------------------------------------------------
Trimethoxy silane                           2487-90-3
------------------------------------------------------------------------
Vinyl acetate monomer                       108-05-4
------------------------------------------------------------------------
Zinc phosphide                              1314-84-7
------------------------------------------------------------------------

IV. References

    1. EPA. Establishment of a National Advisory Committee for Acute 
Exposure Guideline Levels (AEGLs) for Hazardous Substances. Federal 
Register (60 FR 55376, October 31, 1995) (FRL-4987-3). Available on-
line at: http://www.epa.gov/fedrgstr.

    2. EPA. National Advisory Committee for Acute Exposure Guideline 
Levels for Hazardous Substances; Notices. Federal Register (62 FR 
58840, October 30, 1997) (FRL-5737-3). Available on-line at: http://www.epa.gov/fedrgstr
.

    3. EPA. National Advisory Committee for Acute Exposure Guideline 
Levels (AEGLs) for Hazardous Substances, Proposed AEGL Values; Notice. 
Federal Register (65 FR 14186, March 15, 2000) (FRL-6492-4). Available 
on-line at: http://www.epa.gov/fedrgstr.

    4. EPA. National Advisory Committee for Acute Exposure Guideline 
Levels (AEGLs) for Hazardous Substances, Proposed AEGL Values; Notice. 
Federal Register (65 FR 39264, June 23, 2000) (FRL-6591-2). Available 
on-line at: http://www.epa.gov/fedrgstr.

    5. EPA. National Advisory Committee for Acute Exposure Guideline 
Levels(AEGLs) for Hazardous Substances; Proposed AEGL Values. Federal 
Register (65 FR 77866, December 13, 2000) (FRL-6752-5). Available on-
line at: http://www.epa.gov/fedrgstr.

    6. EPA. National Advisory Committee for Acute Exposure Guideline 
Levels (AEGLs) for Hazardous Substances; Proposed AEGL Values. Federal 
Register (66 FR 21940, May 2, 2001) (FRL-6776-3). Available on-line at: 
http://www.epa.gov/fedrgstr.

    7. EPA. National Advisory Committee for Acute Exposure Guideline 
Levels (AEGLs) for Hazardous Substances; Proposed AEGL Values. Federal 
Register (67 FR 7164, February 15, 2002) (FRL-6815-8). Available on-
line at: http://www.epa.gov/fedrgstr.

    8. EPA. National Advisory Committee for Acute Exposure Guideline 
Levels (AEGLs) for Hazardous Substances; Proposed AEGL Values. Federal 
Register (68 FR 42710, July 18, 2003) (FRL-7189-8). Available on-line 
at: http://www.epa.gov/fedrgstr.

    9. EPA. National Advisory Committee for Acute Exposure Guideline 
Levels (AEGLs) for Hazardous Substances; Proposed AEGL Values; Notice 
of Availability. Federal Register (69 FR 54144, September 7, 2004) 
(FRL-7350-2). Available on-line at: http://www.epa.gov/fedrgstr.

    10. EPA. National Advisory Committee for Acute Exposure Guideline 
Levels (AEGLs) for Hazardous Substances; Proposed AEGL Values; Notice 
of Availability. Federal Register (71 FR 60141, October 12, 2006) (FRL-
8095-1). Available on-line at: http://www.epa.gov/fedrgstr.


List of Subjects

     Environmental protection, Acute Exposure Guideline Levels (AEGLs), 
Hazardous substances.


    Dated: September 10, 2007.
James B. Gulliford,
Assistant Administrator, Office of Prevention, Pesticides and Toxic 
Substances.
[FR Doc. E7-18479 Filed 9-18-07; 8:45 am]

BILLING CODE 6560-50-S
