Draft Risk and Exposure Assessment Report for Sulfur Dioxide (SO2, 42341-42343 [E8-16671]

Download as PDF Federal Register / Vol. 73, No. 140 / Monday, July 21, 2008 / Notices fashion that will facilitate the orderly conduct of business. Individuals wishing to make public comment will be provided a maximum of five minutes to present their comments. Minutes: Minutes will be available by writing or calling Pat Halsey at the address and phone number listed above. Minutes will also be available at the following Web site: https:// www.oakridge.doe.gov/em/ssab/ minutes.htm. Issued at Washington, DC on July 11, 2008. Rachel Samuel, Deputy Committee Management Officer. [FR Doc. E8–16596 Filed 7–18–08; 8:45 am] BILLING CODE 6450–01–P DEPARTMENT OF ENERGY High Energy Physics Advisory Panel Office of Science, Department of Energy. ACTION: Notice of open meeting. AGENCY: SUMMARY: This notice announces a meeting of the High Energy Physics Advisory Panel (HEPAP). Federal Advisory Committee Act (Pub. L. 92– 463, 86 Stat. 770) requires that public notice of these meetings be announced in the Federal Register. DATES: Thursday, November 13, 2008; 9 a.m. to 6 p.m. and Friday, November 14, 2008; 8:30 a.m. to 4 p.m. ADDRESSES: DoubleTree Hotel, 1515 Rhode Island Ave, NW., Washington, DC. John Kogut, Executive Secretary; High Energy Physics Advisory Panel; U.S. Department of Energy; SC–25/ Germantown Building, 1000 Independence Avenue, SW., Washington, DC 20585–1290; Telephone: 301–903–1298 SUPPLEMENTARY INFORMATION: Purpose of Meeting: To provide advice and guidance on a continuing basis with respect to the high energy physics research program. Tentative Agenda: Agenda will include discussions of the following: Thursday, November 13, 2008, and Friday, November 14, 2008 • Discussion of Department of Energy High Energy Physics Program • Discussion of National Science Foundation Elementary Particle Physics Program • Reports on and Discussions of Topics of General Interest in High Energy Physics • Public Comment (10-minute rule) Public Participation: The meeting is open to the public. If you would like to PWALKER on PROD1PC71 with NOTICES FOR FURTHER INFORMATION CONTACT: VerDate Aug<31>2005 19:22 Jul 18, 2008 Jkt 214001 file a written statement with the Panel, you may do so either before or after the meeting. If you would like to make oral statements regarding any of these items on the agenda, you should contact John Kogut, 301–903–1298 or John.Kogut@science.doe.gov (e-mail). You must make your request for an oral statement at least 5 business days before the meeting. Reasonable provision will be made to include the scheduled oral statements on the agenda. The Chairperson of the Panel will conduct the meeting to facilitate the orderly conduct of business. Public comment will follow the 10-minute rule. Minutes: The minutes of the meeting will be available for public review and copying within 90 days on the High Energy Physics Advisory Panel Web site. Minutes will also be available by writing or calling John Kogut at the address and phone number listed above. Issued at Washington, DC on July 15, 2008. Rachel Samuel, Deputy Committee Management Officer. [FR Doc. E8–16590 Filed 7–18–08; 8:45 am] BILLING CODE 6450–01–P DEPARTMENT OF ENERGY State Energy Advisory Board (STEAB) Department of Energy, Office of Energy Efficiency and Renewable Energy. ACTION: Notice of open meeting. AGENCY: SUMMARY: This notice announces a meeting of the State Energy Advisory Board (STEAB). The Federal Advisory Committee Act (Pub. L. 92–463, 86 Stat. 770) requires that public notice of these meetings be announced in the Federal Register. DATES: August 13–14, 2008. Times: August 13, 2008, 8:30 a.m.–5 p.m. MDT and August 14, 2008, 8:30 a.m.–Noon MDT. Location: Sheraton Denver West Hotel, 360 Union Blvd., Lakewood, CO 80228. FOR FURTHER INFORMATION CONTACT: Gary Burch, STEAB Designated Federal Officer, Office of Commercialization and Project Management, Golden Field Office, U.S. Department of Energy, 1617 Cole Boulevard, Golden, CO 80401, Telephone 303–275–4801. SUPPLEMENTARY INFORMATION: Purpose of the Board: To make recommendations to the Assistant Secretary for the Office of Energy Efficiency and Renewable Energy regarding goals and objectives, programmatic and administrative policies, and to otherwise carry out the PO 00000 Frm 00029 Fmt 4703 Sfmt 4703 42341 Board’s responsibilities as designated in the State Energy Efficiency Programs Improvement Act of 1990 (Pub. L. No. 101–440). Tentative Agenda: Discuss renewable energy programs at the National Renewable Energy Lab (NREL), discuss how STEAB can continue to support EERE’s commercialization efforts, and update members on routine business matters. A copy of the agenda may be obtained by contacting Gary Burch, the DFO. Public Participation: The meeting is open to the public. Written statements may be filed with the Board either before or after the meeting. Members of the public who wish to make oral statements pertaining to agenda items should contact Gary Burch at the address or telephone number listed above. Requests to make oral comments must be received five days prior to the meeting; reasonable provision will be made to include requested topic(s) on the agenda. The Chair of the Board is empowered to conduct the meeting in a fashion that will facilitate the orderly conduct of business. The Public Comment Period will occur at 3 p.m. MDT on Wednesday, August 13, 2008. Minutes: The minutes of the meeting will be available for public review and copying within 60 days on the STEAB Web site, https://www.steab.org. Issued at Washington, DC, on July 15, 2008. Rachel Samuel, Deputy Committee Management Officer. [FR Doc. E8–16593 Filed 7–18–08; 8:45 am] BILLING CODE 6450–01–P ENVIRONMENTAL PROTECTION AGENCY [EPA–HQ–OAR–2007–0352; FRL–8689–3] Draft Risk and Exposure Assessment Report for Sulfur Dioxide (SO2) Environmental Protection Agency (EPA). ACTION: Notice of draft report for public review and comment. AGENCY: SUMMARY: On or about July 3, 2008, the Office of Air Quality Planning and Standards (OAQPS) of EPA is making available for public review and comment a draft document titled ‘‘Risk and Exposure Assessment to Support the Review of the SO2 Primary National Ambient Air Quality Standards: First Draft.’’ The purpose of this draft document is to convey the approach taken to assess exposures to ambient SO2 and to characterize associated E:\FR\FM\21JYN1.SGM 21JYN1 PWALKER on PROD1PC71 with NOTICES 42342 Federal Register / Vol. 73, No. 140 / Monday, July 21, 2008 / Notices health risks, as well as to present the results of those assessments. DATES: Comments on the above reports must be received on or before August 28, 2008. ADDRESSES: Submit your comments, identified by Docket ID No. EPA–HQ– OAR–2007–0352, by one of the following methods: • https://www.regulations.gov: Follow the on-line instructions for submitting comments. • E-mail: Comments may be sent by electronic mail (e-mail) to a-and-rdocket@epa.gov, Attention Docket ID No. EPA–HQ–OAR–2007–0352. • Fax: Fax your comments to 202– 566–9744, Attention Docket ID. No. EPA–HQ–OAR–2007–0352. • Mail: Send your comments to: Air and Radiation Docket and Information Center, Environmental Protection Agency, Mailcode: 2822T, 1200 Pennsylvania Ave., NW., Washington, DC 20460, Attention Docket ID No. EPA–HQ–OAR–2007–0352. • Hand Delivery or Courier: Deliver your comments to: EPA Docket Center, 1301 Constitution Ave., NW., Room 3334, Washington, DC. Such deliveries are only accepted during the Docket’s normal hours of operation, and special arrangements should be made for deliveries of boxed information. Instructions: Direct your comments to Docket ID No. EPA–HQ–OAR–2007– 0352. The EPA’s policy is that all comments received will be included in the public docket without change and may be made available online at https://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 https:// www.regulations.gov or e-mail. The https://www.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 https:// www.regulations.gov your e-mail address will be automatically captured and included as part of the comment that is placed in the public 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 VerDate Aug<31>2005 19:22 Jul 18, 2008 Jkt 214001 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 https:// www.epa.gov/epahome/dockets.htm. Docket: All documents in the docket are listed in the https:// www.regulations.gov index. 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 either electronically in https:// www.regulations.gov or in hard copy at the Air Docket in the EPA Docket Center, EPA West, Room 3334, 1301 Constitution Ave., NW., Washington, DC. This Docket Facility is open from 8:30 a.m. to 4:30 p.m. Monday through Friday, excluding legal holidays. The Docket telephone number is 202–566– 1742; fax 202–566–9744. FOR FURTHER INFORMATION CONTACT: Dr. Michael Stewart, Office of Air Quality Planning and Standards (Mailcode C504–06), U.S. Environmental Protection Agency, Research Triangle Park, NC 27711; e-mail: stewart.michael@epa.gov; telephone: 919–541–7524; fax: 919–541–0237. General Information A. What Should I Consider as I Prepare My Comments for EPA? 1. Submitting CBI. Do not submit this information to EPA through https:// www.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 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: • Identify the rulemaking by docket number and other identifying PO 00000 Frm 00030 Fmt 4703 Sfmt 4703 information (subject heading, Federal Register date and page number). • 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. • Explain why you agree or disagree; suggest alternatives and substitute language for your requested changes. • Describe any assumptions and provide any technical information and/ or data that you used. • If you estimate potential costs or burdens, explain how you arrived at your estimate in sufficient detail to allow for it to be reproduced. • Provide specific examples to illustrate your concerns, and suggest alternatives. • Explain your views as clearly as possible, avoiding the use of profanity or personal threats. • Make sure to submit your comments by the comment period deadline identified. SUPPLEMENTARY INFORMATION: Under section 108(a) of the Clean Air Act (CAA), the Administrator identifies and lists certain pollutants which ‘‘cause or contribute to air pollution which may reasonably be anticipated to endanger public health or welfare.’’ The EPA then issues air quality criteria for listed pollutants, which are commonly referred to as ‘‘criteria pollutants.’’ The air quality criteria are to ‘‘accurately reflect the latest scientific knowledge useful in indicating the kind and extent of all identifiable effects on public health or welfare which may be expected from the presence of [a] pollutant in the ambient air, in varying quantities.’’ Under section 109 of the CAA, EPA establishes NAAQS for each listed pollutant, with the NAAQS based on the air quality criteria. Section 109(d) of the CAA requires periodic review and, if appropriate, revision of existing air quality criteria. The revised air quality criteria reflect advances in scientific knowledge on the effects of the pollutant on public health or welfare. The EPA is also required to periodically review and revise the NAAQS, if appropriate, based on the revised criteria. Air quality criteria have been established for the sulfur oxides (SOx) and NAAQS have been established for sulfur dioxide (SO2), an indicator for SOx. Presently, EPA is reviewing the air quality criteria for SOx and the NAAQS for SO2. As part of its review of the NAAQS, EPA is preparing an assessment of exposures and characterization of health risks associated with ambient SO2. A draft E:\FR\FM\21JYN1.SGM 21JYN1 Federal Register / Vol. 73, No. 140 / Monday, July 21, 2008 / Notices plan describing the proposed approaches to assessing exposures and characterizing risks is described in the draft document, Sulfur Dioxide Health Assessment Plan: Scope and Methods for Exposure and Risk Assessment. This document was released for public review and comment in November 2007 and was the subject of a consultation with the Clean Air Scientific Advisory Committee (CASAC) on December 5 and 6, 2007. Comments received from that consultation have been considered in developing the draft risk and exposure assessment document being released at this time. The draft document being released at this time conveys the approach taken to assess exposures to ambient SO2 and to characterize associated health risks, as well as to present the results of those assessments. This draft document will be available online at: https:// www.epa.gov/ttn/naaqs/standards/so2/ s_so2_cr_rea.html. The EPA is soliciting advice and recommendations from the CASAC by means of a review on the draft document at an upcoming public meeting of the CASAC scheduled for July 30–31, 2008 in Research Triangle Park, NC. Following the CASAC meeting, EPA will consider comments received from the CASAC and the public in preparing a second draft risk and exposure assessment report. The release of the second draft report will be followed by another CASAC meeting which will be announced in a future Federal Register notice and ultimately EPA will release a final risk and exposure assessment document taking into consideration comments from the CASAC and public. Dated: July 3, 2008. Mary Henigen, Acting Director, Office of Air Quality Planning and Standards. [FR Doc. E8–16671 Filed 7–18–08; 8:45 am] For information on access or services for individuals with disabilities, please contact Gloria Car, U.S. EPA, at (228) 688–2421 or car.gloria@epa.gov. To request accommodation of a disability, please contact Gloria Car, preferably at least 10 days prior to the meeting, to give EPA as much time as possible to process your request. DATES: The meeting will be held in conjunction with the Gulf of Mexico Alliance Implementation Workshop on Tuesday, August 19, 2008, from 9 a.m. to 5 p.m., Wednesday, August 20, 2008, from 9 a.m. to 5 p.m., and Thursday, August 21, 2008, from 9 a.m. to 12 p.m. ADDRESSES: The meeting will be held at the Omni Corpus Christi Hotel-Marina Tower, 707 North Shoreline Boulevard, Corpus Christi, Texas 78401. FOR FURTHER INFORMATION CONTACT: Gloria D. Car, Designated Federal Officer, Gulf of Mexico Program Office, Mail Code EPA/GMPO, Stennis Space Center, MS 39529–6000 at (228) 688– 2421. The proposed agenda includes the following topics: Citizens Advisory Committee Overview, which includes the purposes, member responsibilities, bylaws, and a committee priority setting topic; GMP Program Update; CAC Participation in the Governors’ Alliance and input on Action Plan II; Succession Planning to vote on a new slate of officers and to select alternates; discussions of meeting frequency, date of next meeting and future meeting topics, participation in Workshop Plenary Sessions and Priority Issue Team Meetings. The meeting is open to the public. SUPPLEMENTARY INFORMATION: Dated: July 14, 2008. Gloria D. Car, Designated Federal Officer. [FR Doc. E8–16637 Filed 7–18–08; 8:45 am] ENVIRONMENTAL PROTECTION AGENCY [FRL–8695–1] Proposed CERCLA Administrative Cost Recovery Settlement; Old Village Mill, LLC, Brunswick Mill Site and Carvill Combing Company Site, Plainfield, CT [FRL–8695–4] Gulf of Mexico Program Citizens Advisory Committee Meeting Environmental Protection Agency (EPA). ACTION: Notice of meeting. PWALKER on PROD1PC71 with NOTICES AGENCY: VerDate Aug<31>2005 19:22 Jul 18, 2008 Jkt 214001 Environmental Protection Agency (EPA). ACTION: Notice of proposed settlement; request for public comment. AGENCY: SUMMARY: Under the Federal Advisory Committee Act (Pub. L. 92–463), EPA gives notice of a meeting of the Gulf of Mexico Program (GMP) Citizens Advisory Committee (CAC). and Liability Act, as amended (‘‘CERCLA’’), 42 U.S.C. 9622(i), notice is hereby given of a proposed administrative settlement for recovery of past costs concerning the Brunswick Mill Superfund Site and Carvill Combing Company Superfund Site in Plainfield, Connecticut with the following settling party: Old Village Mill, LLC. The settlement requires the settling party to pay $225,000.00 to the Hazardous Substance Superfund. The settlement includes a covenant not to sue for the settling party pursuant to sections 106 and 107(a) of CERCLA, 42 U.S.C. 9606 and 9607(a). For thirty (30) days following the date of publication of this notice, the Agency will receive written comments relating to the settlement. The Agency will consider all comments received and may modify or withdraw its consent to the settlement if comments received disclose facts or considerations which indicate that the settlement is inappropriate, improper, or inadequate. The Agency’s response to any comments received will be available for public inspection at One Congress Street, Boston, MA 02114–2023. Comments must be submitted on or before August 20, 2008. DATES: Comments should be addressed to Mary Jane O’Donnell, Chief, ME/VT/CT Superfund Section, U.S. Environmental Protection Agency, Region I, One Congress Street, Suite 1100 (HBT), Boston, Massachusetts 02114–2023 (Telephone No. 617–918– 1371) and should refer to: In re: Brunswick Mill Superfund Site and Carvill Combing Company Superfund Site, U.S. EPA Docket No. 01–2008– 0029. ADDRESSES: A copy of the proposed settlement may be obtained from Mary Jane O’Donnell, Chief, ME/VT/CT Superfund Section, U.S. Environmental Protection Agency, Region I, One Congress Street, Suite 1100 (HBT), Boston, Massachusetts 02114–2023 (Telephone No. 617–918– 1371; e-mail odonnell.maryjane@epa.gov). FOR FURTHER INFORMATION CONTACT: BILLING CODE 6560–50–P BILLING CODE 6560–50–P ENVIRONMENTAL PROTECTION AGENCY Dated: April 17, 2008. James T. Owens, III, Director, Office of Site Remediation and Restoration. [FR Doc. E8–16640 Filed 7–18–08; 8:45 am] BILLING CODE 6560–50–P In accordance with section 122(i) of the Comprehensive Environmental Response Compensation SUMMARY: PO 00000 Frm 00031 Fmt 4703 42343 Sfmt 4703 E:\FR\FM\21JYN1.SGM 21JYN1

Agencies

[Federal Register Volume 73, Number 140 (Monday, July 21, 2008)]
[Notices]
[Pages 42341-42343]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: E8-16671]


=======================================================================
-----------------------------------------------------------------------

ENVIRONMENTAL PROTECTION AGENCY

[EPA-HQ-OAR-2007-0352; FRL-8689-3]


Draft Risk and Exposure Assessment Report for Sulfur Dioxide 
(SO2)

AGENCY: Environmental Protection Agency (EPA).

ACTION: Notice of draft report for public review and comment.

-----------------------------------------------------------------------

SUMMARY: On or about July 3, 2008, the Office of Air Quality Planning 
and Standards (OAQPS) of EPA is making available for public review and 
comment a draft document titled ``Risk and Exposure Assessment to 
Support the Review of the SO2 Primary National Ambient Air 
Quality Standards: First Draft.'' The purpose of this draft document is 
to convey the approach taken to assess exposures to ambient 
SO2 and to characterize associated

[[Page 42342]]

health risks, as well as to present the results of those assessments.

DATES: Comments on the above reports must be received on or before 
August 28, 2008.

ADDRESSES: Submit your comments, identified by Docket ID No. EPA-HQ-
OAR-2007-0352, by one of the following methods:
     https://www.regulations.gov: Follow the on-line 
instructions for submitting comments.
     E-mail: Comments may be sent by electronic mail (e-mail) 
to a-and-r-docket@epa.gov, Attention Docket ID No. EPA-HQ-OAR-2007-
0352.
     Fax: Fax your comments to 202-566-9744, Attention Docket 
ID. No. EPA-HQ-OAR-2007-0352.
     Mail: Send your comments to: Air and Radiation Docket and 
Information Center, Environmental Protection Agency, Mailcode: 2822T, 
1200 Pennsylvania Ave., NW., Washington, DC 20460, Attention Docket ID 
No. EPA-HQ-OAR-2007-0352.
     Hand Delivery or Courier: Deliver your comments to: EPA 
Docket Center, 1301 Constitution Ave., NW., Room 3334, Washington, DC. 
Such deliveries are only accepted during the Docket's normal hours of 
operation, and special arrangements should be made for deliveries of 
boxed information.
    Instructions: Direct your comments to Docket ID No. EPA-HQ-OAR-
2007-0352. The EPA's policy is that all comments received will be 
included in the public docket without change and may be made available 
online at https://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 https://
www.regulations.gov or e-mail. The https://www.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 https://www.regulations.gov your e-mail address will be 
automatically captured and included as part of the comment that is 
placed in the public 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 https://www.epa.gov/
epahome/dockets.htm.
    Docket: All documents in the docket are listed in the https://
www.regulations.gov index. 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 either electronically 
in https://www.regulations.gov or in hard copy at the Air Docket in the 
EPA Docket Center, EPA West, Room 3334, 1301 Constitution Ave., NW., 
Washington, DC. This Docket Facility is open from 8:30 a.m. to 4:30 
p.m. Monday through Friday, excluding legal holidays. The Docket 
telephone number is 202-566-1742; fax 202-566-9744.

FOR FURTHER INFORMATION CONTACT: Dr. Michael Stewart, Office of Air 
Quality Planning and Standards (Mailcode C504-06), U.S. Environmental 
Protection Agency, Research Triangle Park, NC 27711; e-mail: 
stewart.michael@epa.gov; telephone: 919-541-7524; fax: 919-541-0237.

General Information

A. What Should I Consider as I Prepare My Comments for EPA?

    1. Submitting CBI. Do not submit this information to EPA through 
https://www.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 
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:
     Identify the rulemaking by docket number and other 
identifying information (subject heading, Federal Register date and 
page number).
     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.
     Explain why you agree or disagree; suggest alternatives 
and substitute language for your requested changes.
     Describe any assumptions and provide any technical 
information and/or data that you used.
     If you estimate potential costs or burdens, explain how 
you arrived at your estimate in sufficient detail to allow for it to be 
reproduced.
     Provide specific examples to illustrate your concerns, and 
suggest alternatives.
     Explain your views as clearly as possible, avoiding the 
use of profanity or personal threats.
     Make sure to submit your comments by the comment period 
deadline identified.

SUPPLEMENTARY INFORMATION: Under section 108(a) of the Clean Air Act 
(CAA), the Administrator identifies and lists certain pollutants which 
``cause or contribute to air pollution which may reasonably be 
anticipated to endanger public health or welfare.'' The EPA then issues 
air quality criteria for listed pollutants, which are commonly referred 
to as ``criteria pollutants.'' The air quality criteria are to 
``accurately reflect the latest scientific knowledge useful in 
indicating the kind and extent of all identifiable effects on public 
health or welfare which may be expected from the presence of [a] 
pollutant in the ambient air, in varying quantities.'' Under section 
109 of the CAA, EPA establishes NAAQS for each listed pollutant, with 
the NAAQS based on the air quality criteria. Section 109(d) of the CAA 
requires periodic review and, if appropriate, revision of existing air 
quality criteria. The revised air quality criteria reflect advances in 
scientific knowledge on the effects of the pollutant on public health 
or welfare. The EPA is also required to periodically review and revise 
the NAAQS, if appropriate, based on the revised criteria.
    Air quality criteria have been established for the sulfur oxides 
(SOx) and NAAQS have been established for sulfur dioxide 
(SO2), an indicator for SOx. Presently, EPA is 
reviewing the air quality criteria for SOx and the NAAQS for 
SO2. As part of its review of the NAAQS, EPA is preparing an 
assessment of exposures and characterization of health risks associated 
with ambient SO2. A draft

[[Page 42343]]

plan describing the proposed approaches to assessing exposures and 
characterizing risks is described in the draft document, Sulfur Dioxide 
Health Assessment Plan: Scope and Methods for Exposure and Risk 
Assessment. This document was released for public review and comment in 
November 2007 and was the subject of a consultation with the Clean Air 
Scientific Advisory Committee (CASAC) on December 5 and 6, 2007. 
Comments received from that consultation have been considered in 
developing the draft risk and exposure assessment document being 
released at this time.
    The draft document being released at this time conveys the approach 
taken to assess exposures to ambient SO2 and to characterize 
associated health risks, as well as to present the results of those 
assessments. This draft document will be available online at: https://
www.epa.gov/ttn/naaqs/standards/so2/s_so2_cr_rea.html.
    The EPA is soliciting advice and recommendations from the CASAC by 
means of a review on the draft document at an upcoming public meeting 
of the CASAC scheduled for July 30-31, 2008 in Research Triangle Park, 
NC. Following the CASAC meeting, EPA will consider comments received 
from the CASAC and the public in preparing a second draft risk and 
exposure assessment report. The release of the second draft report will 
be followed by another CASAC meeting which will be announced in a 
future Federal Register notice and ultimately EPA will release a final 
risk and exposure assessment document taking into consideration 
comments from the CASAC and public.

    Dated: July 3, 2008.
Mary Henigen,
Acting Director, Office of Air Quality Planning and Standards.
[FR Doc. E8-16671 Filed 7-18-08; 8:45 am]
BILLING CODE 6560-50-P
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