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PRELIMINARY FINDINGS FROM THE DETROIT EXPOSURE AND AEROSOL RESEARCH STUDY (DEARS)
Citation:
WILLIAMS, R. W., A. F. VETTE, C. W. CROGHAN, C. D. STEVENS, A. W. REA, D. A. WHITAKER, W. A. MCCLENNY, AND L. S. SHELDON. PRELIMINARY FINDINGS FROM THE DETROIT EXPOSURE AND AEROSOL RESEARCH STUDY (DEARS). Presented at 2nd Windsor Air Quality Symposium, Windsor, ON, CANADA, March 02, 2005.
Impact/Purpose:
Six objectives have been defined for this study.
(1) To determine the associations between concentrations measured at central site monitors and outdoor residential, indoor residential and personal exposures for selected air toxics, PM constituents, and PM from specific sources.
(2) To describe the physical and chemical factors that affect the relationship between central site monitors and outdoor residential and indoor residential concentrations, including those that affect ambient source impacts.
(3) To identify the human activity factors that influence personal exposures to selected PM constituents and air toxics.
(4) To improve and evaluate models used to characterize and estimate residential concentrations of and human exposures to selected air toxics, PM constituents, and PM from specific sources.
(5) To investigate and apply source apportionment models to evaluate the relationships for PM from specific sources and to determine the contribution of specific ambient sources to residential concentrations and personal exposures to PM constituents and air toxics.
(6) To determine the associations between ambient concentrations of criteria gases (O3, NO2, and SO2) and personal exposures for these gases as well as personal exposures to air toxics, PM constituents, and PM from specific sources.
Description:
The Detroit Exposure and Aerosol Research Study (DEARS) has completed its first monitoring season (summer 2005) and is progressing toward initiation of its second season (February 2005). The assistance obtained from the Michigan Department of Environmental Quality has been instrumental in this success as well as those of other collaborating institutions. This briefing will provide an overview of the study's goal and purposes, the research accomplishments to date and an understanding of current efforts to support the winter 2005 field monitoring effort. A preliminary report on summer 2004 monitoring efforts will be provided. These data indicate that: (1) the study was successful in the recruitment and retention of Wayne County residents during the 1st season, (2) the success of the study has been the result of continued cooperation between numerous governmental, academic, and private organizations, (3) an analysis of summer 2004 data indicates that the methodologies utilized in the monitoring would appear to be successful in detecting environmental analytes of interest, (4) fine particulate matter concentrations appear to have been homogeneous across the study area as indicative by mean concentrations normalized to those collected at Allen Park , and (5) a number of new collaboration efforts will be initiated during the winter 2005 monitoring season (such as the Healthy Heart Study).
Although this work was reviewed by the EPA and approved for publication, it may not necessarily reflect official Agency policy.