Detailed Characterization of Indoor and Personal Particulate Matter Concentrations;Final rept

摘要

The study was conducted to characterize indoor and personal exposures to PM (sub 2.5), its major components, and to specific-size ranges for households located in the Los Angeles CA (LA) metropolitan area. This study is a continuation of our efforts to characterize exposures to particles and their constituents. In this study, PM (sub 2.5), black carbon (BC), nitrate (NO (sub 3)), and size-resolved particle volume concentrations were measured continuously inside and outside 17 LA homes. In addition, 24-h personal PM (sub 10), PM (sub 2.5), BC NO (sub 3) exposures were measured for one individual living in each household. Daily time-activity and housing characteristics data were also collected for each household, while a house dust sample was collected in each home on one of the monitoring days. Data from our study provided novel and important information about the composition and size distribution of PM in LA homes, as it-for the first time-combined measurements of PM size and composition with data on air exchange rates, ventilation conditions, and activity patterns.