Method 3540 is a procedure for extracting nonvolatile and semivolatlle organic compounds from solids such as soils, sludges, and wastes. The Soxhiet extraction process ensures intimate contact of the sample matrix with the extraction solvent.This method is applicable to the isolation and concentration of water-insoluble and slightly water soluble organics in preparation for a variety of chromatographic procedures.This method is restricted to use by or under the supervision of trained analysts. Each analyst must demonstrate the ability to generate acceptable results with this method.