The pollution characteristics, including fish toxicity, and the treatability of six airplane cleaning wastes from operations at the Lockbourne Air Force Base were investigated. The study involved the collection of waste samples, the determination of the pollutional characteristics of the wastes, the investigation of treatment methods necessary prior to discharge into the stream, and a determination of the toxicity to fish of the untreated and treated effluents. The information developed by this study is to be used as one factor in determining the suitability of the individual compounds for the cleaning of airplanes.