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Indoor and outdoor particulate matter at an elementary school: implications for recess activities and asthma.

Veranth-JM; Buchi-K; Frei-N; Eskelson-E; Larsen-R; Nye-D; Parker-J; Perry-K; Wood-E; Smith-G; Chuy-L; Packham-S
Proceedings of the Seventh International Aerosol Conference, September 10-15, 2006, St. Paul, Minnesota, USA.. Biswas P, Chen DR, Hering S, eds. Mount Laurel, NJ: American Association for Aerosol Research, 2006 Sep; :778-779
Winter inversions lead to high concentrations of ambient particulate matter, especially in valley cities that are surrounded by mountains. The mass concentration of particulate matter (PM) is generally lower indoors during air pollution episodes, but building design, air handling equipment operation, and occupant activities all affect the composition and size distribution of the indoor aerosol. (Lillquist, 1998) During high pollution events, health advisories are issued recommending that sensitive individuals stay indoors and that everyone avoid outdoor exercise. However, there is little peer- reviewed data quantifying the reduction in particle exposure that is achieved by staying indoors or the health benefits of this exposure reduction to groups such as children with asthma. An urban elementary school is the test site for an exciting collaborative project between physicians and aerosol scientists that includes the Salt Lake City School District, the University of Utah Departments of Pediatrics, Family and Preventative Medicine, Pharmacology and Toxicology, and Meteorology, the Utah Department of Health, the Utah Division of Air Quality. The overall project is being coordinated though the Utah Asthma Task Force, and is centered around a study of the effect of a 15-minute recess on lung function as measured by spirometry in children with and without asthma. The goals of the air sampling are 1) to provide indoor air quality data to the asthma study investigators; and 2) to allow using receptor-based source apportionment modeling and particle transfer function modeling to understand the contributions of indoor and outdoor sources to the indoor exposure. 3) to provide quantitative data to support guidance for school administrators and parents regarding when it is better for children to play indoors. The long range goal of this research is to contribute to the scientific basis for improved community health advisories and for improved operation of public building air handling systems to reduce exposure to the pollutants that cause or exacerbate attacks in children with asthma. (Thurston, 2003)
Particulates; Indoor-environmental-quality; Outdoors; Bronchial-asthma; Pollution; Pollutants; Aerosols; Humans; Children; Exposure-levels; Risk-factors; Lung; Lung-function; Pulmonary-function; Pulmonary-system; Respiration; Respiratory-irritants; Spirometry; Air-sampling; Models; Author Keywords: Particulate matter; Environmental health; Comparison of indoor and outdoor
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Biswas-P; Chen-DR; Hering-S
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Proceedings of the Seventh International Aerosol Conference, September 10-15, 2006, St. Paul, Minnesota, USA.
Performing Organization
University of Utah, Salt Lake City, Utah