You are here:
A PREDICTIVE MODEL RELATING PERSONAL PM EXPOSURES WITH FIXED LOCATION OUTDOOR AND MICROENVIRONMENTAL INDOOR CONCENTRATIONS
Citation:
Rodes, C. E., J. Thornburg, D. Ensor, P. A. Lawless, AND L A. Wallace. A PREDICTIVE MODEL RELATING PERSONAL PM EXPOSURES WITH FIXED LOCATION OUTDOOR AND MICROENVIRONMENTAL INDOOR CONCENTRATIONS. Presented at PM 2000 AWMA Conference, Charleston, SC, January 24-28, 2000.
Impact/Purpose:
The primary study objectives are:
1.To quantify personal exposures and indoor air concentrations for PM/gases for potentially sensitive individuals (cross sectional, inter- and intrapersonal).
2.To describe (magnitude and variability) the relationships between personal exposure, and indoor, outdoor and ambient air concentrations for PM/gases for different sensitive cohorts. These cohorts represent subjects of opportunity and relationships established will not be used to extrapolate to the general population.
3.To examine the inter- and intrapersonal variability in the relationship between personal exposures, and indoor, outdoor, and ambient air concentrations for PM/gases for sensitive individuals.
4.To identify and model the factors that contribute to the inter- and intrapersonal variability in the relationships between personal exposures and indoor, outdoor, and ambient air concentrations for PM/gases.
5.To determine the contribution of ambient concentrations to indoor air/personal exposures for PM/gases.
6.To examine the effects of air shed (location, season), population demographics, and residential setting (apartment vs stand-alone homes) on the relationship between personal exposure and indoor, outdoor, and ambient air concentrations for PM/gases.
Description:
The Atlanta Supersites project is the first of two Supersites projects to be established during Phase I of EPA's Supersites Program; Phase II is being established through a Request for Assistance. The other initial project is in Fresno, California. The Supersites Program is part of EPA's National PM2.5 network, which consists of about 1100 sites for PM2.5 mass measured by the FRM and about 250-300 sites where the major components of PM2.5 will be determined. The objectives of the Supersites Program are to obtain information on atmospheric processes and provide information to assist states with State Implementation Plans (SIPS) for PM2.5, to support health effects related studies, and to evaluate measurement methods for particulate matter (PM) and PM precursors. The Atlanta Supersites project is focused on the last of these objectives, but meets the other objectives through leveraging with ongoing studies, including the Southeastern Aerosol Research Characterization Study (SEARCH), Aerosol Research Inhalation Epidemiological Study (ARIES), Southern Center For the Integrated Study of Secondary Air Pollutants (SCISSAP), and others. Specifically, evaluations at Atlanta focused on state-of the science measurement methods for PM and PM precursors and related species. Methods evaluated as part of the Atlanta Supersite project included four single particle mass spectrometer type methods, a series of semicontinuous methods for mass, sulfate, nitrate, ammonium, gas phase counter parts and other related species, and integrated filter/denuder based methods for PM2.5 mass and the chemical components of mass. Sampling occurred over a 28 day period during the month of August at a SEARCH/AREIS site located in NE Atlanta. This paper will describe the objectives and design of the Atlanta Supersite project and present preliminary results, where available.
This work has been funded wholly or in part by the United States Environmental Protection Agency through internal funding. It has been subjected to Agency review and approved for publication. Mention of trade names or commercial products does not constitute endorsement or recommendation for use.