Use of Real-Time Sensors to Assess Misclassification and to Identify Main Sources Contributing to Peak and Chronic Exposures

This unpublished report describes a three-year study aimed at evaluating exposures to air pollutants from traffic and indoor sources. The study followed a panel of participants who lived close to or further away from busy roads and had either gas or electric stoves. The investigators measured the participants’ exposures indoors and outdoors, as well as their personal exposures in various microenvironments, using real-time pollutant sensors that were fairly novel at the time. The investigators tested a series of portable sensors and compared them against reference methods to evaluate the accuracy and precision of those sensors. They focused on measuring ultrafine particles, fine particles, black carbon, and nitrogen dioxide in different microenvironments to identify which activities (e.g., cooking, cleaning, or commuting), microenvironments, and sources (e.g., traffic) contributed most to personal exposures. They were also interested in characterizing the profile of the pollutant mixtures associated with those activities and microenvironments.

This report and the accompanying Review Committee Critique of the report are available upon request.