Since 1982, the U.S. Environmental Protection Agency (EPA) has been conducting performance assessments of hazardous waste thermal destruction facilities in the United States. The principal objective of these tests has been to characterize emissions and determine if these facilities are capable of meeting the waste destruction and control requirements of the current EPA regulations and standards. To date the test program has involved performance assessments at nine incinerators and over twenty high temperature industrial processes employing hazardous waste as a fuel supplement in their operations. The testing has typically involved stack emissions assessment for SOx, NOx, particulate, HC1, CO, CO2, O2, metals, total hydrocarbon, and quantification of specific organic compound emissions.