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The Multiple Air Toxics
Exposure Study III (MATES III) is a monitoring and evaluation study
conducted in the South Coast Air Basin (Basin). The study is a follow
up to
previous air toxics studies in the Basin and is part of the South Coast Air
Quality Management District Governing Board's
2003-04
Environmental Justice Workplan.
Seven
Public Workshops on
MATES III were conducted in the months of February and March 2008
at various locations throughout the Basin, including Burbank, Long Beach,
Carson, Riverside, Rancho Cucamonga, Diamond Bar and San Pedro. At the workshops, SCAQMD staff presented an overview of the findings, and
sought input and
comments on the study from the public.
Presentation (PDF - 403 KB)
Also, a MATES III Technical Advisory Group Meeting took place at the SCAQMD
Headquarters on March 13, 2008.
Agenda (Provides
Presentation Material)
The MATES III Study consists of several elements. These include a
monitoring program, an updated emissions inventory of toxic air
contaminants, and a modeling effort to characterize risk across the Basin.
The study focuses on the carcinogenic risk from exposure to air toxics. It
does not estimate mortality or other health effects from particulate
exposures.
The initial scope of the monitoring occurred during a one-year period
between April,
2004 and March, 2005. However, because the heavy rains in the Basin
during this
period were not reflective of typical meteorology, the study was extended for a
second year between April, 2005 and March, 2006.
MATES
III Carcinogenic Risk Interactive Map
Click on the link for the Interactive Map of the Basin to identify the
estimated modeled carcinogenic risk from air toxics by geographic location
as shown in Figure ES-4 in the Executive Summary of the Draft MATES III
Report. See Chapter 4 of the Draft Report for details of the
modeling analysis.
A Draft Report was available for a 90-day
public review and comment period, which ended April 4, 2008. Comments on the MATES III
were sent to
Dr. Jean Ospital, AQMD Health Effects Officer
at (909) 396-2582 or jospital@aqmd.gov
Draft Report
Cover (PDF - 213k)
Authors and Contributors, Table of
Contents (PDF - 33k)
Executive Summary (PDF - 1.1MB)
Chapter 1: Introduction and
Chapter 2: MATES III Monitoring Program
(PDF - 236k)
Chapter 3: Emissions Inventory
Development (PDF - 63k)
Chapter 4: Regional Model
Evaluation (PDF - 925k)
Chapter 5: Microscale Study
(PDF - 85k)
Chapter 6:Summary Findings and
Conclusions (PDF - 19k)
Appendices
Cover (PDF - 213k)
Authors and Contributors
(PDF - 17k)
Appendix I: List of Substances
and their Associated Risk Factor (PDF - 16k)
Appendix II: List of MATES III
Technical Advisory Group Members
(PDF - 10k)
Appendix III: Monitoring and
Laboratory Analysis Protocols (PDF - 241k)
Appendix IV: Measurements of
Ambient Naphthalene and Other PAHs
(PDF - 56k)
Appendix V: PM2.5 Particulate
Bound Organic Compound Analysis
(PDF - 56k)
Appendix VI: Summary of Fixed
Monitoring Site Data (PDF - 400k)
Appendix VII: PM2.5 Source
Apportionment Methodology (PDF - 202k)
Appendix VIII: 2005
Emissions by Major Source Category (PDF - 58k)
Appendix IX: Air Toxic Regional
Modeling (PDF - 2.8MB)
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