The paper describes the recent modifications made to the U.S. Environmental Protection Agency's (EPA) Mobile Incineration System. These modifications were aimed toward increasing the capacity of the system as well as its on-stream factor. The operation of the modified system was resumed on June 1. 1987. During the three month period following that, various system performance tests were conducted. Besides these tests, over a million pounds of dioxin-contaminated lids and liquids including soil, plastics, trash, grass, tyvek, clothing, wood, etc. have been incinerated. A brief summary of the various test results and the highlights of the major problems encountered during the system operation, adopted solutions, and lessons learned are also presented in the paper.