The respondent is mailed instructions and a sealable plastic bag to collect dust from his/her vacuum cleaner. The respondent is asked to collect the dust from his/her vacuum cleaner and mail it to the laboratory. At the laboratory, the sample is sieved, weighed, and analyzed for environmental contaminants. If the timing of the dust collection (e.g., time of year, timing with respect to prior house cleaning, etc.) is critical the researcher should inform the respondent.
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