In - Situ Burning — A Decision - Maker’s Guide to In - Situ Burning This scenario is fictitious, but the ci rcumstances are possible. In - situ burning (ISB) is a response option that ha s been used less frequently than countermeasures like booms and skimme rs or contaminated soil removal. Consequently, familiarity with the pros and cons of this option is limited. There are ISB “experts” in the United States and internationally, but the intentional practice of this response t ool remains relatively limited for both on - water and on - land situations. This booklet is the second in a seri es that were developed as reference documents for oil spill respon se decision - makers. It provides the reader with a comprehensive, concise, yet clear su mmary of the operational requirements and limitations for ISB and allows decision - makers to better understand the function of in - situ burning and the tradeoffs facing decision - makers in smithies technology when responding to an oil spill on land or on water