[Federal Register Volume 74, Number 239 (Tuesday, December 15, 2009)]
[Pages 66353-66354]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: E9-29591]



[FRL-9090-9; Docket ID No. EPA-HQ-ORD-2007-0517]

Integrated Science Assessment for Particulate Matter

AGENCY: Environmental Protection Agency.

ACTION: Notice of availability.


SUMMARY: The Environmental Protection Agency (EPA) is announcing the 
availability of a final document titled, ``Integrated Science 
Assessment for Particulate Matter'' (EPA/600/R-08/139F) and the 
supplementary annexes (EPA/600/R-08/139FA). The document was prepared 
by the National Center for Environmental Assessment (NCEA) within EPA's 
Office of Research and Development as part of the review of the 
national ambient air quality standards (NAAQS) for particulate matter.

DATES: The document will be available on or about December 15, 2009.

ADDRESSES: The ``Integrated Science Assessment for Particulate Matter'' 
will be available primarily via the Internet

[[Page 66354]]

on the National Center for Environmental Assessment's home page under 
the Recent Additions and Publications menus at http://www.epa.gov/ncea. 
A limited number of CD-ROM or paper copies will be available. Contact 
Ms. Deborah Wales by phone (919-541-4731), fax (919-541-5078), or e-
mail ([email protected]) to request either of these, and please 
provide your name, your mailing address, and the document title, 
``Integrated Science Assessment for Particulate Matter'' (EPA/600/R-08/
139F and EPA/600/R-08/139FA) to facilitate processing of your request.
    For technical information, contact Dr. Lindsay Wichers Stanek, 
NCEA; telephone: 919-541-7792; facsimile: 919-541-2985; or e-mail: 
[email protected].


I. Information About the Document

    Section 108(a) of the Clean Air Act directs the Administrator to 
identify certain pollutants which, among other things, ``cause or 
contribute to air pollution which may reasonably be anticipated to 
endanger public health or welfare'' and to issue air quality criteria 
for them. These 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 * * *.'' 
Under section 109 of the Act, EPA is then to establish national ambient 
air quality standards (NAAQS) for each pollutant for which EPA has 
issued criteria. Section 109(d) of the Act subsequently requires 
periodic review and, if appropriate, revision of existing air quality 
criteria to reflect advances in scientific knowledge on the effects of 
the pollutant on public health or welfare. EPA is also to revise the 
NAAQS, if appropriate, based on the revised air quality criteria.
    Particulate matter (PM) is one of six principal (or ``criteria'') 
pollutants for which EPA has established NAAQS. Periodically, EPA 
reviews the scientific basis for these standards by preparing an 
Integrated Science Assessment (ISA) (formerly called an Air Quality 
Criteria Document). The ISA and supplementary annexes, in conjunction 
with additional technical and policy assessments, provide the 
scientific basis for EPA decisions on the adequacy of the current NAAQS 
and the appropriateness of possible alternative standards. The Clean 
Air Scientific Advisory Committee (CASAC), an independent science 
advisory committee whose existence and whose review and advisory 
functions are mandated by Section 109(d)(2) of the Act, is charged 
(among other things) with independent scientific review of EPA's air 
quality criteria.
    On June 28, 2007 (72 FR 35462), EPA formally initiated its current 
review of the air quality criteria for PM, requesting the submission of 
recent scientific information on specified topics. A draft of EPA's 
''Integrated Review Plan for the National Ambient Air Quality Standard 
for Particulate Matter'' (EPA/452/P-08-006) was made available in 
October 2007 for public comment and was discussed by the CASAC PM 
Review Panel via a publicly accessible teleconference consultation on 
November 30, 2007 (72 FR 63177). EPA finalized the plan and made it 
available in March 2008 (EPA/452/R-08-004; http://www.epa.gov/ttn/naaqs/standards/pm/s_pm_2007_pd.html). In June 2008 (73 FR 30391), 
EPA held a workshop to discuss, with invited scientific experts, 
initial draft materials prepared in the development of the PM ISA and 
its supplementary annexes.
    The First External Review Draft ISA for PM (EPA/600/R-08/139 and 
EPA/600/R-08/139A; http://cfpub.epa.gov/ncea/cfm/recordisplay.cfm?deid=201805) was released on December 22, 2008 (73 FR 
77686). This document was reviewed by the CASAC and discussed at a 
public meeting on April 1 and 2, 2009 (74 FR 7688). The CASAC held a 
follow-up public teleconference on May 7, 2009 (74 FR 18230) to review 
and approve the CASAC PM Review Panel's draft letter providing comments 
to the Agency on the First External Review Draft ISA for PM (http://
    The Second External Review Draft ISA for PM (EPA/600/R-08/139B and 
EPA/600/R-08/139BA; http://cfpub.epa.gov/ncea/cfm/recordisplay.cfm?deid=210586) was released on July 31, 2009 (74 FR 
38185) and reviewed and discussed by CASAC at a public meeting on 
October 5 and 6, 2009 (74 FR 46586). The CASAC held a follow-up public 
teleconference on November 12, 2009 to review and approve the CASAC PM 
Review Panel's draft letter providing comments to the Agency on the 
Second External Review Draft ISA for PM (http://yosemite.epa.gov/sab/sabproduct.nsf/MeetingCal/24CDD0F35DB3EC9F8525762400482B2F?OpenDocument). EPA has considered 
comments by CASAC and by the public in preparing this final ISA.

     Dated: December 1, 2009.
Rebecca Clark,
Acting Director, National Center for Environmental Assessment.
[FR Doc. E9-29591 Filed 12-14-09; 8:45 am]