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INDOOR AND OUTDOOR ULTRA-FINE PARTICLE COUNTS IN A 1999 TWO-SEASON FRESNO, CALIFORNIA, USA ACUTE CARDIAC PANEL STUDY
Citation:
Creason, J P., L Sheldon, D Walsh, L Neas, AND C. Rodes. INDOOR AND OUTDOOR ULTRA-FINE PARTICLE COUNTS IN A 1999 TWO-SEASON FRESNO, CALIFORNIA, USA ACUTE CARDIAC PANEL STUDY. Presented at International Society of Environmental Epidemiology, Garmisch-Partenkirchen, Germany, September 2-5, 2001.
Description:
Indoor and Outdoor Ultrafine Particle Counts in a 1999 Two-Season Fresno, California, USA Acute Cardiac Panel Study.
John Creason, Debra Walsh, Lucas Neas, US Environmental Protection Agency, Office of Research and Development, National Health and Environmental Effects Research Laboratory, RTP, NC
Linda Sheldon, US Environmental Protection Agency, Office of Research and Development, National Exposure Research Laboratory, RTP, NC
Charles Rodes, Phil Lawless, Research Triangle Institute, Center for Engineering and Environmental Technology, RTP, NC
A linked epidemiology/exposure study was conducted over two seasons, winter (February 1-28, 1999) and spring (April19-May 16, 1999) in Fresno, CA. One major objective of the study was to investigate the relationship between fine particle pollution and impaired cardiac autonomic control in the elderly. Extensive ambient and indoor monitoring was conducted as a part of this effort, including measurement of ultrafine particle distributions both outdoors and indoors at a single detached residence. Particle sizes ranging from 0.01 to 2.5 mm were collected and have been characterized both as functions of size, season and meteorology and as a function of indoor-outdoor relationships and penetration rates.
Aerosol concentrations were measured using a scanning mobility particle spectrometer (SMPS, TSI Model 3934) and a laser aerosol spectrometer (LASX, Particle Measuring Systems). Combined, these instruments provided particle concentrations in over 40 size bins from 0.01 to 2.5 mm. To investigate the potential relationship of these particle counts to health measures collected from elderly residents of the retirement facility location, hourly summaries of the counts were merged with subject physiological measures. Results of this analysis, incorporating concurrent gas phase pollutants and meteorology, will be discussed.
This is an abstract of a proposed presentation and does not necessarily reflect EPA policy.