SOURCES, COMPOSITION, VARIABILITY AND TOXICOLOGICAL CHARACTERISTICS OF COARSE (PM10-2.5) PARTICLES IN SOUTHERN CALIFORNIA
Impact/Purpose:
The objective of this proposal is to provide the much-needed information on the relationships between coarse particulate matter (PM) sources, spatial and seasonal characteristics, and toxicity in Southern California. The proposed multidisciplinary research in ambient measurements, exposure assessment and toxicology will be integrated with other major research efforts currently under way in Southern California, including the EPA-funded Southern California PM Center.
Description:
Our research will help EPA understand the linkage between sources, composition and the toxicity of coarse PM, which provides a strong scientific basis to develop cost-effective strategies to protect the public from the toxic sources of coarse particulate matter. The current data will help determine if there is a scientific foundation for controlling coarse particulate matter from only a subset of coarse particulate sources. Moreover, data on coarse PM characteristics will become an invaluable resource to the ongoing and planned PM exposure and health studies in the LAB, including major research programs, such as the Southern California PM Center (SCPC) and MESA Air investigations
Record Details:
Record Type:PROJECT(
ABSTRACT
)
Start Date:11/01/2007
Completion Date:10/31/2009
Record ID:
187703
Keywords:
AIR POLLUTION, AMBIENT AIR QUALITY, MONITORING, ENVIRONMENTAL EXPOSURE, TOXICOLOGY, HUMAN HEALTH, SENSITIVE POPULATIONS, ENVIRONMENTAL MONITORING, AIR SAMPLING, AIRBORNE PARTICULATE MATTER, CHEMICAL CHARACTERISTICS, CHEMICAL SPECIATION SAMPLING, SOURCE APPORTIONMENT,
Related Organizations:
Role
:OWNER
Organization Name
:UNIVERSITY OF CALIFORNIA - LOS ANGELES
Mailing Address
:405 Hilgard Ave
Citation
:Los Angeles
State
:CA
Zip Code
:90024
Role
:OWNER
Organization Name
:UNIVERSITY OF WISCONSIN - MADISON
Mailing Address
:500 Lincoln Dr
Citation
:Madison
State
:WI
Zip Code
:53706
Role
:OWNER
Organization Name
:UNIVERSITY OF SOUTHERN CALIFORNIA
Mailing Address
:University Park
Citation
:Los Angeles
State
:CA
Zip Code
:90089
Project Information:
Approach
:The proposed project spans an approximate 24-month cycle of measurements at ten locations impacted by different PM sources and representing distinctly different areas (urban, rural- receptor and desert) of the Los Angeles Basin (LAB). Seven of these locations are also sampling sites of the MESA (Multi-Ethnic Study of Atherosclerosis) Air Pollution Study (“MESA Air”). Two of them are high schools in urban Los Angeles with a high Hispanic student population. In each of our fixed sites, measurements of coarse PM mass, inorganic ions (sulfate and nitrate), elemental and organic carbon (EC-OC), speciated organic tracers, trace elements and metals as well as concurrent in vitro measurements of their redox activity and oxidative potential will be conducted on continuous and time-integrated bases. We will also conduct winter and summer intensive campaigns in these areas. The 24 hr averaged sampling campaigns are designed to give us an estimate of the spatial variability of coarse PM metrics and how they affect the observed particle toxicity, whereas the purpose of the intensive campaigns will be to determine the diurnal variability in chemical composition of these particles. Indoor-outdoor ratios for coarse PM mass and each species will be determined for selected sites. Coarse PM source apportionment and linkages of sources to toxicological outcomes will be a major focus of analysis.
Cost
:$1,120,641.00
Research Component
:Air Quality and Air Toxics
Approach
:The proposed project spans an approximate 24-month cycle of measurements at ten locations impacted by different PM sources and representing distinctly different areas (urban, rural- receptor and desert) of the Los Angeles Basin (LAB). Seven of these locations are also sampling sites of the MESA (Multi-Ethnic Study of Atherosclerosis) Air Pollution Study (“MESA Air”). Two of them are high schools in urban Los Angeles with a high Hispanic student population. In each of our fixed sites, measurements of coarse PM mass, inorganic ions (sulfate and nitrate), elemental and organic carbon (EC-OC), speciated organic tracers, trace elements and metals as well as concurrent in vitro measurements of their redox activity and oxidative potential will be conducted on continuous and time-integrated bases. We will also conduct winter and summer intensive campaigns in these areas. The 24 hr averaged sampling campaigns are designed to give us an estimate of the spatial variability of coarse PM metrics and how they affect the observed particle toxicity, whereas the purpose of the intensive campaigns will be to determine the diurnal variability in chemical composition of these particles. Indoor-outdoor ratios for coarse PM mass and each species will be determined for selected sites. Coarse PM source apportionment and linkages of sources to toxicological outcomes will be a major focus of analysis.
Cost
:$1,120,641.00
Research Component
:Particulate Matter
Project IDs:
ID Code
:R833743
Project type
:EPA Grant