[Federal Register Volume 75, Number 130 (Thursday, July 8, 2010)]
[Notices]
[Pages 39252-39253]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2010-16491]


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ENVIRONMENTAL PROTECTION AGENCY

[EPA-HQ-OAR-2007-0492; FRL-9171-8]


Release of Final Documents Related to the Review of the National 
Ambient Air Quality Standards for Particulate Matter

AGENCY: Environmental Protection Agency (EPA).

ACTION: Notice of Availability.

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SUMMARY: The Office of Air Quality Planning and Standards (OAQPS) of 
EPA is announcing the availability of two final documents titled, 
Quantitative Health Risk Assessment for Particulate Matter and 
Particulate Matter Urban-Focused Visibility Assessment. These two 
documents describe the quantitative analyses that have been conducted 
as part of the review of the national ambient air quality standards 
(NAAQS) for particulate matter (PM).

DATES: These documents will be available on or about June 30, 2010.

ADDRESSES: The documents will be available primarily via the Internet 
at the following Web site: http://www.epa.gov/ttn/naaqs/standards/pm/s_pm_2007_risk.html.

FOR FURTHER INFORMATION CONTACT: For questions related to the final 
document titled, Quantitative Health Risk Assessment for Particulate 
Matter, please contact Dr. Zachary Pekar, Office of Air Quality 
Planning and Standards (Mail code C504-06), U.S. Environmental 
Protection Agency, Research Triangle Park, NC 27711; e-mail: 
[email protected]; telephone: 919-541-3704; fax: 919-541-0237.
    For questions related to the final document titled, Particulate 
Matter Urban-Focused Visibility Assessment, please contact Ms. Vicki 
Sandiford, Office of Air Quality Planning and Standards (Mail code 
C504-06), U.S. Environmental Protection Agency, Research Triangle Park, 
NC 27711; e-mail: sandiford,[email protected]; telephone: 919-541-2629; 
fax: 919-541-0237.

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 these 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 primary (health-based) and secondary 
(welfare-based) NAAQS for pollutants for which air quality criteria are 
issued. 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

[[Page 39253]]

periodically review and revise the NAAQS, if appropriate, based on the 
revised criteria.\1\
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    \1\ See http://www.epa.gov/ttn/naaqs/review.html for more 
information on the NAAQS review process.
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    Presently, EPA is reviewing the NAAQS for PM. The EPA's overall 
plan and schedule for this review is presented in the Integrated Review 
Plan for the National Ambient Air Quality Standards for Particulate 
Matter.\2\ A draft of this integrated review plan was released for 
public review and comment in October 2007 and was the subject of a 
consultation with the Clean Air Scientific Advisory Committee (CASAC) 
on November 30, 2007 (72 FR 63177; November 8, 2007).\3\ Comments 
received from that consultation and from the public were considered in 
finalizing the plan and in beginning the review of the air quality 
criteria.
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    \2\ EPA 452R-08-004; March 2008; Available: http://www.epa.gov/ttn/naaqs/standards/pm/s_pm_2007_pd.html.
    \3\ See http://yosemite.epa.gov/sab/sabproduct.nsf/WebProjectsbyTopicCASAC!OpenView for more information on CASAC 
activities related to the current PM NAAQS review.
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    As part of EPA's review of the primary and secondary PM NAAQS, the 
Agency conducted quantitative assessments characterizing: (1) The 
health risks associated with exposure to ambient PM, and (2) urban 
visibility impairment associated with ambient PM. The EPA's plans for 
conducting these assessments, including the proposed scope and methods 
of the analyses, were presented in two planning documents titled, 
Particulate Matter National Ambient Air Quality Standards: Scope and 
Methods Plan for Health Risk and Exposure Assessment and Particulate 
Matter National Ambient Air Quality Standards: Scope and Methods Plan 
for Urban Visibility Impact Assessment (henceforth, Scope and Methods 
Plans).\4\ These documents were released for public comment in February 
2009 and were the subject of a consultation with the CASAC on April 2, 
2009 (74 FR 11580; March 18, 2009).
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    \4\ EPA-452/P-09-001 and -002; February 2009; Available: http://www.epa.gov/ttn/naaqs/standards/pm/s_pm_2007_pd.html.
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    First and second external review drafts of the assessment documents 
were released for CASAC review and public comment in September 2009 (74 
FR 46589; September 10, 2009) and January/February 2010 (75 FR 4067; 
January 26, 2010), respectively, and were the subjects of CASAC review 
meetings in October 2009 (74 FR 46586; September 10, 2009) and March 
2010 (75 FR 8062; February 23, 2010), respectively. In preparing the 
final assessment documents, EPA has considered comments received from 
CASAC and the public on these earlier draft documents. The final 
assessment documents announced today convey the approaches taken to 
assess PM-related human health risks and urban visibility impairment, 
as well as present key results, observations, and related uncertainties 
associated with the quantitative analyses performed. These documents 
will be available on or about June 30, 2010, through the Agency's 
Technology Transfer Network (TTN) Web site at http://www.epa.gov/ttn/naaqs/standards/pm/s_pm_2007_risk.html.

    Dated: June 25, 2010.
Jennifer Noonan Edmonds,
Acting Director.
[FR Doc. 2010-16491 Filed 7-7-10; 8:45 am]
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