What sources of emissions data were used for the CEP modeling study?
• Point Sources. EPA’s 1990 Toxics Release Inventory (TRI), a database of estimated emissions for large manufacturing sources. • Area and Mobile Sources. EPA’s 1990 base year national interim emissions Inventories for volatile organic compounds (VOCs) and particulate matter (PM) Inventories, which includes facility-specific data on point sources such as incinerators and county-level emissions totals for mobile sources and small industrial, commercial, consumer and agricultural sources. Hazardous air pollutant emissions estimates were derived from VOC and PM emission estimates by the applying speciation profiles, which are industry-specific and/or process-specific estimates of particular chemicals in a VOC or PM emissions stream. These profiles were obtained from an EPA database and from numerous journal articles and published reports. • Background Concentrations. These were estimated using measurements taken in remote “clean air locations” which were removed from the impact of local po
