The zero headspace extractor complies with the Toxicity Characteristic Leaching Procedure (TCLP) requirements of the National Environmental Protection Agency for volatile compounds. The purpose of the dissolution test is to determine the presence of two types of flowability, organic and inorganic pollutants, in liquids, solids, and multiphase waste. If the dissolution test is applied to extract samples from solid waste and extract samples from the waste at leaching levels or if the solid waste sample material itself contains concentrations exceeding the allowable limit, the waste refers to hazardous waste that conforms to the toxic characteristic material structure.