Skip common site navigation and headers
United States Environmental Protection Agency
Exposure Research
Begin Hierarchical Links EPA Home > Research & Development > Exposure Research > Publications/Presentations > End Hierarchical Links

 

Preliminary Exposure Assessment Findings from the Tampa Asthmatic Children's Study

spacer
spacer
Abstract: The Tampa Asthmatic Children's Study (TACS) was a pilot study that focused on developing and evaluating air pollution exposure assessment methods and participant recruiting tools. The four-week study was performed in October and November, 2003. The study involved repeated daily personal, residential, and ambient air pollution measurements for a cohort of nine children. Measurements were taken to determine the microenvironmental concentrations of combustion-related products (CRP), particulate matter (PM), and some air toxics. A portable "lunch box" was developed that permitted air in close proximity to the young child (personal) to be continuously monitored. The lunch box was designed to fully contain all of the active and passive sampling devices needed for personal monitoring of each child in a safe and effective manner. The lunch box had to be lightweight, quiet, and portable so that it would be easy to move the box and keep it near their child at all times. Participating children were clinically diagnosed as being asthmatics, less than or equal to 5 years of age, and lived in single family dwellings with nonsmoking parents. They were recruited through a broad-based campaign consisting of public notices, physician and community contacts. The study involved 24-hour integrated PM2.5 and PM10 mass measurements over four consecutive days for each participant. Real-time measurement of PM2.5 mass concentrations were collected using the MIE-pDR nephelometer. These measures and the activities recorded in a daily dairy will be used to correlate the child's personal PM exposure with their activities and the microenvironments where they spend time. Concentrations of a number of criteria pollutants (CO, SO2, NO2, O3) were also measured. Data collection for the study has been completed and an initial data analysis has been performed. Mean daily personal, residential indoor, residential outdoor, and ambient PM2.5 mass concentrations were 12.5, 9.3, 11.3, and 12.7 µg/m3, respectively. Personal PM2.5 mass concentrations ranged from 6.1 to 26.1 µg/m3. Specific source events such as exposure to cooking aerosols, household cleaning events, riding in an automobile, and burning candles were determined to contribute to the children's total personal PM exposure. Personal and residential indoor concentrations of criteria pollutants were below the national ambient air quality standards for all participants.

This work has been funded wholly by the United States Environmental Protection Agency' s Office of Research and Development under contract # 68-D-99-012 to the Research Triangle Institute. It has been subjected to Agency review and approved for publication.

spacer
Citation:Stevens, C., R. W. Williams, F. L. Chen, A. F. Vette, R. L. Seila, E. Amos, L. S. Sheldon, C. Rodes, and J. Thornburg. Preliminary Exposure Assessment Findings from the Tampa Asthmatic Children's Study. Presented at Tampa Environmental Protection Commission, Tampa, FL, April 29, 2003.
spacer
spacer
Contact: Liz Hope - (919) 541-2785 or hope.elizabeth@epa.gov
spacer
Division: Human Exposure & Atmospheric Sciences Division
spacer
Branch: Exposure Measurements & Analysis Branch
spacer
Product Type: Abstrct/Oral
spacer
Presented: 04/29/2003
spacer
Related Entries:
spacer
Bullet Item Field Studies to Identify and Quantify Factors That Effect Microenvironmental Concentrations and Exposures
spacer Relationship Reason:   A Project of the Product
spacer
spacer
spacer

 

ORD Home | Search EPA | Search NERL | Search EIMS | Contacts | Help

 
Begin Site Footer

EPA Home | Privacy and Security Notice | Contact Us

Last Updated on Monday, October 22, 2007
URL: http://cfpub.epa.gov