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INDOOR AND OUTDOOR PM10 AND ASSOCIATED METALS AND PESTICIDES IN ARIZONA
Citation:
Lebowitz, M. D., M. K. O'Rourke, S. Rogan, J. Reses, P. Van de Water, A. Blackwell, D. J. Moschandreas, S. M. Gordon, AND G L. Robertson. INDOOR AND OUTDOOR PM10 AND ASSOCIATED METALS AND PESTICIDES IN ARIZONA. INHALATION TOXICOLOGY 12(Sup 1):139-144, (2000).
Impact/Purpose:
The overall objectives of this task are to
1) conduct analyses of the NHEXAS data for description of data quality and aggregate exposures;
2) review, summarize, and organize the NHEXAS questionnaire and analytical results databases, and
3) collect and record the experiences and recommendations of the study investigators and staff regarding key lessons which were learned in conducting these studies.
Description:
The National Human Exposure Assessment Survey study in Arizona (AZ NHEXAS) sampled trace metals in multimedia in and outside of 176 representative homes in Arizona. PM10 was collected using low-flow impactors indoors and out. Primary metals evaluated from monitoring of indoor and outdoor air were lead, cadmium, chromium, nickel, and arsenic. Secondary metals were also evaluated. They were analyzed using gas chromatography-inductively coupled plasma/atomic emission spectroscopy (GC-ICP/AES). Air concentrations of metals do not contribute appreciable amounts to total concentrations of metals, and none were above levels of concern. Measurements were made of selected pesticides (primarily chlorpyrifos and diazinon) from particulate matter (PM10) filters obtained indoors and outdoors. Indoor air pesticide exposures represent about 25% of the total exposure to these pesticides. The highest 10% of exposures were related to questions about pesticide usage, at home and at work.
The U.S. Environmenal Protection Agency through its Office of Research and Development funded and collaborated in the research described here under cooperative agreement CR821560 and contact 68-D-99-002 to Michael D. Lebowitz. This article has been subjected to agency review and approved for publication. Mention of trade names or commercial products does not constitutute an endorsement or recommendation for use.