The document discusses the EPA's revision of standards for PM2.5 in the United States. It first provides background on PM2.5, including its size, composition, sources and environmental concentrations. It then reviews the history of PM standards in the US and legal challenges. The EPA established a new process for revising the PM2.5 standard in 2012, which included scientific assessments, public comments, and economic analyses across multiple documents that are the focus of this discussion.
7. 176 R. D. Brook
PM2.5とは?
Figure 1 Size, sources and composition of PM air pollution
RBC, red blood cell; SVOC, semi-volatile organic carbons; UFP, ultra-fine particles; VOC, volatile organic carbons.
Brook (2011) in Clinical Science 115, 175-187より引用
13年1月24日木曜日 (cardiovascular) system [1–3]. In the present review,
CV elemental carbon). Particle sizes range from clusters of 7
11. どこから来るの?
PRIMARY SECONDARY
Aqueous
phase
reactions
Organic Gas phase of dicarbonyls,
organic acids
Compounds reactions and ·OH, ·NO2, O3
of alkanes,
aromatics, alkenes,
olefins, etc Aerosol
and ·OH, O3, NO2 phase Droplet
reactions evaporation
products
products
products
Gas/particle partitioning
Nucleation, sorption, condensation/evaporation
Figure 3-4. Primary emissions and formation of SOA through gas, cloud and condensed
phase reactions.
It should be noted that many of the products of terpene oxidation are oxidative in nature, and
US EPA merely nonreactive oxidation products. Organic peroxides represent an important class of
are not (2009) Integrated Science Assessment for Particulate Matter より引用
reactive oxygen species (ROS) that have high oxidizing potential and could cause oxidative stress in
13年1月24日木曜日 11
24. 米国PM環境基準値の歴史(訴訟編)
■ 1987年:National Resources Defense Council vs EPA
PM10の第一次改訂は支持される
■ 1997年:American Track Association vs EPA
PM2.5の基準値新設は一旦EPA敗訴
2001年に最高裁でEPA勝訴→PM2.5基準値認可
EPA is not permitted consider the cost of
implementing NAAQS.
陪審員曰く...
NAAQS should be neither more nor less stringent
than necessary.
■ 2009年:American Farm Bureau Federation vs EPA
PM2.5基準値に「差し戻し」の判決!
EPA failed to adequately explain why the standard
陪審員曰く... provided the requisite protection from both of short-
and long-term exposure to fine particles, including
protection for at-risk populations such as children.
13年1月24日木曜日 24
26. 新基準値決定までの流れ
2008 [1] Integrated Review Plan for the NAAQS for PM
2009 [2] Integrated Science Assessment for PM
CASAC
2010 [3] Quantitative Health Risk Assessment for PM Review
&
Public
2011 [4] Policy Assessment for the Review of the PM NAAQS Comm.
2012 [5] Responses to Significant Comments on the 2012
Proposed Rule on the NAAQS for PM
[6] NAAQS for PM
[7] Regulatory Impact Analysis for the Final Revisions
to the NAAQS for PM
13年1月24日木曜日 26
28. [1] Integrated Review Plan for the NAAQS for PM
Integrated Review Plan for the
National Ambient Air Quality
Standards for Particulate Matter
Finalized in 2008, pp85
13年1月24日木曜日 28
30. 3 KEYLINKS TO OF CONTENTS.................................................................................. 18
TABLE OTHER NAAQSISSUES AND OTHER RELATED AGENCY ACTIVITIES .............13
2 1.5REVIEW SCHEDULE ........................................................................................................ 16
1 POLICY-RELEVANT REVIEWS
12 3.1INTRODUCTION..................................................................................................................16
REVIEW SCHEDULE ........................................................................................................ 1
INTRODUCTION.................................................................................................................. 1
KEY ISSUES RELATED TO THE PRIMARY PM NAAQS ..........................................................................18
1 3.2INTRODUCTION..................................................................................................................18
3 1.1REVIEW SCHEDULE ........................................................................................................ 16
POLICY-RELEVANT ISSUES ..................................................................................
3 3.1
1.2
[1] IRP:文書の構成
TABLE OFREQUIREMENTS...........................................................................................................3
CONTENTS
OVERVIEW OF THE NAAQS REVIEW PROCESS...............................................................................2
2 1.1INTRODUCTION.................................................................................................................. 1
OVERVIEW OF THE NAAQS REVIEW PROCESS...............................................................................2
ISSUES RELATED TO THE PRIMARY PM PM NAAQS ....................................................................21
POLICY-RELEVANT SECONDARY NAAQS ..........................................................................18
1 1.1 KEYISSUES RELATED TO THEISSUES .................................................................................. 18
LEGISLATIVE REQUIREMENTS...........................................................................................................3
OVERVIEW OF THE NAAQS REVIEW PROCESS...............................................................................2
1
1.2 LEGISLATIVE THE NAAQS REVIEW PROCESS...............................................................................2
4 1.1 SCIENCE ASSESSMENT OF PRIMARY PMPM PM .............................................................................5
3.1
3.2
1.3
1.3
1.2
OVERVIEW OF
3 1.2KEYLEGISLATIVEREVIEWS OFSECONDARYFORNAAQS ....................................................................21
HISTORY OF REVIEWS .................................................................................................. 18
POLICY-RELEVANT ISSUES .................................................................................. 23
ISSUES RELATED TO THE NAAQS ..........................................................................18
ISSUES RELATED TO THE THE NAAQS FOR PM .............................................................................5
HISTORY OF REQUIREMENTS...........................................................................................................3
THE NAAQS
LEGISLATIVE REQUIREMENTS...........................................................................................................3
3.2 ISSUESRELATED TO THE THE NAAQS FOR PM ..........................................................................18
RELATED TO THE SECONDARY PM NAAQS ....................................................................21
1 1.3 INTRODUCTION.................................................................................................................. 1
3.1 ISSUES AND REVIEWS
SCOPE OF THE CURRENT PRIMARY PM NAAQS.............................................................................5
4.1SCIENCE ASSESSMENTOF REVIEW...................................................................................................12
1.4
1.4
4 1.3 SCOPE OF THE CURRENT REVIEW...................................................................................................12
HISTORY OF ORGANIZATION.............................................................................................................23
.................................................................................................. 23
3.2 HISTORY OFOF THE NAAQS REVIEWAND OTHER RELATED AGENCY ACTIVITIES .............13
OVERVIEW REVIEWS OF REVIEWS PROCESS...............................................................................2
THE NAAQS FOR PM .............................................................................5
1.5
1.1
4.2
1.5
4 1.4 SCOPE TO OTHER TO THE SECONDARY PM NAAQS ....................................................................21
ISSUESTO OTHER NAAQS REVIEWS AND OTHER RELATED AGENCY ACTIVITIES .............13
LINKS RELATED NAAQS ..................................................................................................................24
1.4 SCIENCE OF THEAPPROACHREVIEW...................................................................................................12
ASSESSMENT CURRENT
LINKS ASSESSMENT .................................................................................................. 23
4.1 AND ORGANIZATION.............................................................................................................23
SCOPE OF THEREQUIREMENTS...........................................................................................................3
1.2
1.5 LEGISLATIVE CURRENT REVIEW...................................................................................................12
LINKS TO OTHER PUBLIC REVIEW ...................................................................................................40
SCIENTIFIC AND NAAQS REVIEWS AND OTHER RELATED AGENCY ACTIVITIES .............13
4.3SCIENCESCHEDULE ........................................................................................................ 23
4.1
2 1.3 LINKS TO OF ORGANIZATION.............................................................................................................23
SCOPE AND
4 1.5 REVIEW SCHEDULE ........................................................................................................ 16
2 4.2 REVIEW ASSESSMENT OFREVIEWS AND OTHER RELATED AGENCY ACTIVITIES .............13
REVIEWS .................................................................................................. 16
ASSESSMENT APPROACH ..................................................................................................................24
HISTORY OTHER NAAQS THE NAAQS FOR PM .............................................................................5
4.2 ASSESSMENT APPROACH ..................................................................................................................24
5 4.3REVIEW SCHEDULE ........................................................................................................ 16
SCOPE AND AND PUBLIC REVIEW ...................................................................................................40
SCIENTIFIC ORGANIZATION.............................................................................................................23
2 4.1REVIEW HEALTH RISK AND EXPOSURE ASSESSMENTS ....................................... 16
1.4HUMAN SCHEDULE ........................................................................................................ 41
3 4.3KEY SCIENTIFIC AND PUBLIC REVIEW...................................................................................................12
SCOPE OF THE CURRENTISSUES .................................................................................. 18
2 4.2 KEYASSESSMENT APPROACHISSUES .................................................................................. 18
POLICY-RELEVANT REVIEW ...................................................................................................40
3 5.1 POLICY-RELEVANT
LINKS TO OTHER TO THE ..................................................................................................................24
OVERVIEW.............................................................................................................................................41
1.5HUMAN HEALTH NAAQS REVIEWS AND OTHER..........................................................................18
RELATED AGENCY ACTIVITIES .............13
5 4.3KEY SCIENTIFIC ANDRISK AND EXPOSURE ASSESSMENTS ....................................... 18
3 5.2
3.1
3.1 ISSUES .................................................................................. 41
POLICY-RELEVANT RISK ASSESSMENT FROM LAST REVIEW..........................................42
ISSUES RELATED TO THE PRIMARY PM NAAQS ..........................................................................18
ISSUES RELATED PRIMARY PM NAAQS
5 5.1 HUMAN HEALTH PUBLICISSUES .................................................................................. 18
3.2 OVERVIEW OF HEALTH REVIEW ...................................................................................................40
3 3.1KEYISSUES RELATEDRISK AND EXPOSURE NAAQS ....................................................................21
POLICY-RELEVANT ASSESSMENTS ....................................... 41
OVERVIEW.............................................................................................................................................41
ISSUES RELATED TO THE PRIMARY PM NAAQS ..........................................................................18
ISSUES RELATED TO THE SECONDARY PM NAAQS ....................................................................21
3.2REVIEW SCHEDULE ........................................................................................................ 16
TO THE SECONDARY PM
2 3.1
5 3.2HUMANQUALITY CHARACTERIZATION PM PM NAAQS LAST REVIEW..........................................42
5.3
5.1
5.2 ISSUES RELATED TO THE PRIMARY ...............................................................................................44
AIR HEALTH RISK AND ASSESSMENT FROM
ISSUES RELATED TO THE SECONDARY NAAQS ..........................................................................18
OVERVIEW.............................................................................................................................................41
OVERVIEW OF HEALTH RISKEXPOSURE ASSESSMENTS ....................................... 41
....................................................................21
4 3.2 SCIENCE ASSESSMENT .................................................................................................. 23
5.4SCIENCE ASSESSMENT .................................................................................................. 23
POPULATION EXPOSURERISK ASSESSMENT FROM ....................................................................21
ASSESSMENT PM NAAQS LAST REVIEW..........................................42
APPROACH ...................................................................45
3 5.1 KEYISSUES AND OF HEALTH ISSUES .................................................................................. 18
4 5.3
5.2
5.5
POLICY-RELEVANT SECONDARY .......................................................................................49
RELATED TO THE
OVERVIEW
AIR QUALITY CHARACTERIZATION ...............................................................................................44
OVERVIEW.............................................................................................................................................41
HEALTH RISK ASSESSMENT APPROACH
4 5.2SCIENCE ASSESSMENT .................................................................................................. 23
4.1
5.3
5.4
4.1 SCOPE ORGANIZATION.............................................................................................................23
OVERVIEW OF CHARACTERIZATIONPM APPROACH ...................................................................45
SCOPE RELATED TO THE PRIMARY ...............................................................................................44
AIR QUALITY HEALTH RISK ASSESSMENT FROM LAST REVIEW..........................................42
POPULATION EXPOSURE ASSESSMENT NAAQS ..........................................................................18
ISSUES AND ORGANIZATION.............................................................................................................23
3.1SCIENCE ASSESSMENT .................................................................................................. 23
4 4.1
5.6
4.2
5.4
5.5
4.2 BROADER RISK CHARACTERIZATION............................................................................................53
HEALTH RISK APPROACH ASSESSMENT APPROACH ...................................................................45
ASSESSMENT APPROACH ..................................................................................................................24
SCOPE AND ORGANIZATION.............................................................................................................23
ASSESSMENT EXPOSURE ..................................................................................................................24
POPULATION ASSESSMENT APPROACH .......................................................................................49
5.3
3.2
4.1 AIR QUALITY CHARACTERIZATION ...............................................................................................44
ISSUES RELATED TO THE SECONDARY PM NAAQS ....................................................................21
SCOPE AND AND PUBLIC REVIEW ...................................................................................................54
5.7
4.3
4.2 SCIENTIFIC ORGANIZATION.............................................................................................................23
...................................................................................................40
ASSESSMENT EXPOSURE ASSESSMENT APPROACH ...................................................................45
5.5
4.3
5.6
5.4 POPULATION APPROACH REVIEW ...................................................................................................40
SCIENTIFIC AND PUBLIC ..................................................................................................................24
HEALTH RISK ASSESSMENT APPROACH .......................................................................................49
BROADER RISK CHARACTERIZATION............................................................................................53
4 4.3 VISIBILITY RISK APPROACHREVIEW ...................................................................................................40
4.2 ASSESSMENT ..................................................................................................................24
SCIENTIFICRISK CHARACTERIZATION............................................................................................53
SCIENTIFIC AND RISK .................................................................................................. 23
BROADER AND PUBLIC REVIEW ...................................................................................................54
5.7SCIENCE ASSESSMENTAND APPROACH .......................................................................................49
5.6 PUBLIC
5 5.5 HUMAN HEALTH PUBLICWELFARE-RELATED ASSESSMENTS ............................ 41
HEALTH ANDASSESSMENT
6 4.3 HUMAN HEALTH RISK AND EXPOSURE ASSESSMENTS ....................................... 55
OTHER REVIEW ...................................................................................................54
SCIENTIFIC AND PUBLICREVIEW ...................................................................................................40
5 4.1
5.7 EXPOSURE ASSESSMENTS ....................................... 41
SCIENTIFIC ORGANIZATION.............................................................................................................23
SCOPE AND AND
5.6HUMAN HEALTH CHARACTERIZATION............................................................................................53
5.1 BROADER RISK RISK AND EXPOSURE ASSESSMENTS ....................................... 41
5 6.1VISIBILITY AND OTHER WELFARE-RELATED ASSESSMENTS ............................ 55
OVERVIEW.............................................................................................................................................41
OVERVIEW.............................................................................................................................................55
6 5.7HUMAN HEALTH RISK AND EXPOSURE ASSESSMENTS ....................................... 41
5.1 OVERVIEW.............................................................................................................................................41
5 5.1 VISIBILITY AND VISIBILITY-RELATED ASSESSMENTLAST REVIEW..........................................42
4.2 ASSESSMENT APPROACH ..................................................................................................................24
SCIENTIFIC AND PUBLICRISK ASSESSMENT FROM ASSESSMENTS ............................ 55
6 6.1
5.2
6.2
5.2 OTHER REVIEW ...................................................................................................54
OVERVIEW OF HEALTH WELFARE-RELATED FROM LAST REVIEW............................55
OVERVIEW OF HEALTH RISK ASSESSMENT FROM LAST REVIEW..........................................42
OVERVIEW.............................................................................................................................................41
OVERVIEW.............................................................................................................................................55
4.3
5.1
5.3
6.3 SCIENTIFIC AND PUBLIC REVIEW ...................................................................................................40
OVERVIEW.............................................................................................................................................41
5.2VISIBILITY ANDCHARACTERIZATION ...............................................................................................44
AIR QUALITY VISIBILITY-RELATED ASSESSMENT FROM LAST REVIEW............................55
OVERVIEWAND OTHER WELFARE-RELATED ASSESSMENT APPROACH ...............................60
VISIBLITY OF HEALTH RISK ASSESSMENT FROM LAST REVIEW..........................................42
6.1
5.3
6.2
6 5.2 OVERVIEW OF CHARACTERIZATION ...............................................................................................44
OVERVIEW.............................................................................................................................................55
AIR QUALITY OTHER WELFARE-RELATED ASSESSMENTS ............................ 55
6.4
6.2
5.4 OVERVIEW OFEXPOSURE REVIEW ...................................................................................................62
POPULATION HEALTH RISK ASSESSMENT FROM LAST REVIEW..........................................42
5.3 HUMAN HEALTHVISIBILITY-RELATED ASSESSMENT ...................................................................45
5.4 POPULATION EXPOSURE ASSESSMENT APPROACH ...................................................................45
SCIENTIFIC ANDRISK WELFARE-RELATED ASSESSMENTLAST REVIEW............................55
OVERVIEW OF PUBLIC ASSESSMENT APPROACH FROM APPROACH ...............................60
AIR QUALITY CHARACTERIZATION ...............................................................................................44
5 5.3
6.3
6.1 VISIBLITY AND OTHERAND EXPOSURE ASSESSMENTS ....................................... 41
OVERVIEW.............................................................................................................................................55
AIR QUALITY CHARACTERIZATION ...............................................................................................44
5.5
5.4 SCIENTIFIC OF ASSESSMENT APPROACH .......................................................................................49
HEALTH RISK ASSESSMENT APPROACH .......................................................................................49
POPULATION EXPOSURE ASSESSMENT APPROACH ...................................................................45
5.1AMBIENT AIRAND OTHER WELFARE-RELATED ASSESSMENT APPROACH ...............................60
6.3
5.5
6.4
6.2
7 5.5
VISIBLITY AND PUBLIC REVIEW ...................................................................................................62
HEALTH RISK VISIBILITY-RELATED ASSESSMENT FROM LAST REVIEW............................55
OVERVIEW.............................................................................................................................................41
OVERVIEWRISK CHARACTERIZATION............................................................................................53
5.4
5.6
6.4
5.6
5.2
6.3 SCIENTIFICOF OTHER RISK ......................................................................................... 63
MONITORING
POPULATION EXPOSURE ASSESSMENT APPROACH ...................................................................45
BROADER RISK CHARACTERIZATION............................................................................................53
HEALTH RISK ASSESSMENT APPROACH .......................................................................................49
OVERVIEW AND PUBLIC REVIEW ...................................................................................................62
BROADER ANDHEALTHWELFARE-RELATEDFROM LAST REVIEW..........................................42
ASSESSMENT ASSESSMENT APPROACH ...............................60
VISIBLITY MONITORING ......................................................................................... 63
5.5AMBIENT AIR AND PUBLIC REVIEW ...................................................................................................54
7.1
7 5.6
5.7
5.7 HEALTH RISK ASSESSMENT APPROACH .......................................................................................49
OVERVIEW.............................................................................................................................................63
SCIENTIFIC AND PUBLIC REVIEW ...................................................................................................54
BROADER RISK CHARACTERIZATION............................................................................................53
SCIENTIFIC
5.3
6.4 AIR QUALITY CHARACTERIZATION ...............................................................................................44
SCIENTIFIC AND PUBLIC REVIEW ...................................................................................................62
7 5.7 AMBIENT AIRANDCHARACTERIZATION............................................................................................53
5.6
7.2 HISTORICALMONITORING ......................................................................................... 63
BROADER RISK PUBLIC REVIEW ...................................................................................................54
7.1 SCIENTIFIC PERSPECTIVE................................................................................................................63
OVERVIEW.............................................................................................................................................63
6 5.7 VISIBILITY ANDISSUES RELATED TO THEAPPROACH ...................................................................45
5.4
7.3
7.1 MONITORING EXPOSURE ASSESSMENT PM NAAQS...................................................................65
POPULATION
7.2AMBIENT AIR AND PUBLICWELFARE-RELATED ASSESSMENTS ............................ 63
HISTORICAL OTHER REVIEW ...................................................................................................54
SCIENTIFIC PERSPECTIVE................................................................................................................63 55
OVERVIEW.............................................................................................................................................63
7 5.5 MONITORING ......................................................................................... 55
HEALTH RISK ASSESSMENT APPROACH .......................................................................................49
6 7.3VISIBILITY ANDPERSPECTIVE................................................................................................................63
6.1
6.1
7.2 MONITORING OTHER WELFARE-RELATED ASSESSMENTS ............................
OVERVIEW.............................................................................................................................................55
OVERVIEW.............................................................................................................................................55
HISTORICAL ISSUES RELATED TO THE PM NAAQS...................................................................65
6 6.1 POLICY ASSESSMENT/ RELATED TO THE ........................................................................ 71
7.1VISIBILITY AND OTHER WELFARE-RELATED ASSESSMENTS ............................ 55
8 5.6
6.2
6.2
7.3
OVERVIEW.............................................................................................................................................63
OVERVIEW OFISSUES RULEMAKING PM NAAQS...................................................................65
BROADER RISKVISIBILITY-RELATED ASSESSMENT FROM LAST REVIEW............................55
MONITORING CHARACTERIZATION............................................................................................53
OVERVIEW.............................................................................................................................................55
OVERVIEW OF VISIBILITY-RELATED ASSESSMENT FROM LAST REVIEW............................55
7.2
6.1
5.7 HISTORICAL PERSPECTIVE................................................................................................................63
OVERVIEW.............................................................................................................................................55
SCIENTIFICAND OTHER WELFARE-RELATED ASSESSMENT APPROACH ...............................60
VISIBLITY AND PUBLIC REVIEW ...................................................................................................54
8 6.2 POLICY ASSESSMENT/ RULEMAKING ........................................................................ 71
6.3 OVERVIEWAND OTHER WELFARE-RELATED ASSESSMENT APPROACH ...............................60
6.3REFERENCESOF VISIBILITY-RELATED ASSESSMENT FROM LAST REVIEW............................55
VISIBLITY ....................................................................................................................
9 6.3 POLICY ASSESSMENT/ RULEMAKINGPM NAAQS...................................................................65
7.3
8 6.2
6.4 MONITORING ISSUES RELATED TO THE ........................................................................ 72
VISIBLITY ANDVISIBILITY-RELATED ASSESSMENT FROM LAST REVIEW............................55
OVERVIEW OF OTHER WELFARE-RELATED ASSESSMENT APPROACH ...............................60
SCIENTIFIC AND PUBLIC REVIEW ...................................................................................................62 71
6.4 SCIENTIFIC AND PUBLIC REVIEW ...................................................................................................62
6 6.4 REFERENCESANDOTHER WELFARE-RELATED ASSESSMENT APPROACH ...............................60
9 6.3 VISIBILITY AND OTHER WELFARE-RELATED ASSESSMENTS ............................ 72
VISIBLITY ....................................................................................................................
SCIENTIFICAND PUBLIC REVIEW ...................................................................................................62 55
APPENDIX A............................................................................................................................... 77
8 6.4POLICY ASSESSMENT/ RULEMAKING ........................................................................ 71
9 REFERENCES MONITORING ......................................................................................... 63
SCIENTIFIC .................................................................................................................... 72
7 6.1AMBIENT AIRAND PUBLIC REVIEW ...................................................................................................62
OVERVIEW.............................................................................................................................................55
APPENDIX A............................................................................................................................... 63
OVERVIEW MONITORING ......................................................................................... 77
7 6.2AMBIENT MATTER INTEGRATED SCIENCE ASSESSMENT - PROPOSED OUTLINE ....................77
PARTICULATEAIR OF VISIBILITY-RELATED ASSESSMENT FROM LAST REVIEW............................55
7.1 OVERVIEW.............................................................................................................................................63
9 PARTICULATE AIR .................................................................................................................... 63
REFERENCES MONITORING ......................................................................................... 72
APPENDIX A............................................................................................................................... 77
7 7.1AMBIENT MATTEROTHER WELFARE-RELATED ASSESSMENT APPROACH ...............................60
6.3
7.2 VISIBLITY AND INTEGRATED SCIENCE ASSESSMENT - PROPOSED OUTLINE ....................77
OVERVIEW.............................................................................................................................................63
HISTORICAL PERSPECTIVE................................................................................................................63
PARTICULATE MATTER INTEGRATED SCIENCE PM NAAQS...................................................................65
7.1
7.2
6.4
7.3 MONITORING ISSUES RELATED TO THE ASSESSMENT - PROPOSED OUTLINE ....................77
OVERVIEW.............................................................................................................................................63
HISTORICALAND PUBLIC REVIEW ...................................................................................................62
SCIENTIFIC PERSPECTIVE................................................................................................................63
APPENDIX A............................................................................................................................... 77
7.2
7.3 MONITORINGPERSPECTIVE................................................................................................................63
HISTORICAL ISSUES RELATED TO THE ASSESSMENT - PROPOSED OUTLINE ....................77
PARTICULATE MATTER INTEGRATED SCIENCE PM NAAQS...................................................................65
13年1月24日木曜日8
7 POLICY ASSESSMENT/ RULEMAKING ........................................................................ 71
AMBIENT AIR MONITORING ......................................................................................... 63 30
31. [1] IRP Ch2:今後のタイムスケジュール案
Table 2-1. Proposed Schedule for Development of PM Integrated Science Assessment (ISA) and
Review of PM2.5 and PM10 NAAQS
Stage of Review Major Milestone Target Dates
Integrated Plan Literature Search Ongoing
Federal Register Call for Information June 2007
Workshops on Science/Policy Issues July 2007
Prepare Draft Integrated Review Plan October 2007
CASAC Consultation November 2007
Prepare Final Integrated Review Plan March 2008
Science Prepare First Draft ISA September 2008
Assessment
CASAC/Public Review of First Draft ISA December 2008
Prepare Second Draft ISA March 2009
CASAC/Public Review of Second Draft ISA May 2009
Prepare Final ISA September 2009
Risk/Exposure Prepare Draft Scope and Methods Plan October 2008
Assessments
CASAC Consultation on Scope and Methods Plan December 2008
Prepare First Draft Risk/Exposure Assessments April 2009
CASAC/Public Review of First Draft Risk/Exposure May 2009
Assessments
Prepare Second Draft Risk/Exposure Assessments November 2009
CASAC/Public Review of Second Draft Risk/Exposure January 2010
Assessments
Prepare Final Risk/Exposure Assessments March 2010
Policy Advance Notice of Proposed Rulemaking (ANPR) June 2010
Assessment/
CASAC Review/Public Comment on ANPR August 2010
Rulemaking
Proposed Rulemaking January 2011
Final Rulemaking October 2011
13年1月24日木曜日 31
32. oracic coarse particles in the ambient air. This evaluation of the available scientific evidence
[1] IRPpolicy-relevant issues by addressing a series of questions including the
ll focus on key
Ch3:キーとなるpolicy-relevant issueの特定
llowing: 3 KEY POLICY-RELEVANT ISSUES
Has new information policy-relevant issues to be addressed in this review are presented below as occurrence of health
The key
altered the body of scientific support for the a
series of policy-relevant questions that will frame our approach to determining whether the
effects following short- secondary NAAQS for PM should be retainedtorevised. The ISA and and thoracic coarse
current primary and and/or long-term exposure or levels of fine
risk/exposure assessments to be conducted in this review will provide the basis for addressing
particles found questions. ambienttoair? questions, and the resulting conclusions regarding the
these in the The answers these
corresponding policy-relevant issues, will inform the policy assessment/rulemaking that will lead
Has new information altered conclusions from previous reviews regarding the plausibility
to the decision of whether to retain or revise the current 24-hour and annual primary and
of adverse health effects associated with exposures to PM2.5, PM10,10PM10-2.5, or
secondary standards for PM2.5 and the 24-hour primary and secondary standards for PM .
alternative PM indicators thatcategories of particle18
In the last PM NAAQS review, EPA focused on particle mass and primarily
distinguished between two
might be considered? on size (i.e., fine- and coarse-
pollution based
What evidence is particles), and conductedrecentevaluations offocused on specific size fractions,
fraction available from parallel studies the available scientific evidence relating
to each category. The importance of specific PM components and sources was evaluated within
chemical components, sources, or environments (e.g., urban andextent to
the context of this basic size differentiation. In this review, EPA will consider the non-urban areas) of PM
to inform our understanding of the available toof PM exposures particle are linked to various
which new information has become
nature assess and determine how that pollution is
defined. Specific characteristics to consider will include particle size/mass, composition, and
health outcomes?
sources/environments (e.g., urban and rural areas). This information will inform decisions
related to whether sufficient evidence exists to warrant consideration of alternative indicators for
To what extent and,key scientific evidence becoming available to improve our
PM,
is if appropriate, the development of new NAAQS.
understanding of the health effects THE PRIMARY PMvarious time periods of PM exposures,
3.1 ISSUES RELATED TO associated with NAAQS
The first step in reviewing the adequacy of the current primary PM standards is to
including not onlywhether the available body ofor multi-day)assessedchronicand addressed in years)
consider
short-term (daily scientific evidence, and in the ISA (months to
exposures, but air quality and risk/exposure assessments, supports or calls into question the scientific extent is critical
the also peak PM exposures (less than 24-hour)? To what
13年1月24日木曜日
conclusions reached in the last review regarding health effects related to exposure to fine and 32
33. [2] Integrated Science Assessment for PM
December 2009
EPA/600/R-08/139F
Integrated Science Assessment for
Particulate Matter
Includes Errata Sheet created on 2/10/2010
Finalized in 2009
1071pp + Annex1157pp
National Center for Environmental Assessment-RTP Division
Office of Research and Development
U.S. Environmental Protection Agency
Research Triangle Park, NC
13年1月24日木曜日 33