The purpose of this study was to determine the contribution of itnersections and roadways to PM-10 or PM-2.5 hot spots (areas of significatn pollutatn concentrations). This study was conducted in two independent phases. The first phase analyzed three recent years of nationwide AIRS/AQS data (1994-1996) to determien the PM-10 concentration differences between 22 microscale (hot spot) monitors and associated neighborhood scale monitors. The second phase entailed a field testing program conducted near a major arterial intersection in the City of Lakewood, a suburb of Denver, Colorado.
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