This report documents results of 42 hazardous waste combustion tests performed on 11 full-scale industrial boilers. The report discusses the boiler operating conditions, measured organic and other gaseous emissions, and the achieved destruction efficiency of principal organic hazardous constituents (POHC's) present in the waste. The report is divided in two volumes. Volume I presents a summary of all test data, discusses conclusions, and highlights trends in POHC destruction and other byproduct emissions with respect to boiler operation and POHC type. The destruction efficiency of 14 other volatile and semivolatile hazardous organics is also reported. In general, industrial boilers tested achieved greater than 99.99 percent POHC destruction efficiency under conditions investigated. Although not clearly evident, the collected data point out lower destruction efficiencies with transient or off-specification burner and feedrate conditions. Emissions of identifiable products of incomplete combustion (PIC's) were generally one to two orders of magnitude greater than POHC breakthrough emissions. Lower PIC emissions accompanied greater POHC destruction efficiencies.