The National Enforcement. Investigations Center of the EPA provides support services for the enforcement activities of the Agency. Recently, we have analyzed hazardous wastes as part of efforts to enforce the Resource Conservation and Recovery Act. Inorganic analysis often consists of elemental determinations. However, sometimes it is necessary to identify specific compounds. Some wastes are classified as hazardous by their origin, for instance, the wastes from the manufacture of several chromium pigments. On occasion, it is necessary to trace wastes to their source. In cleaning dumps and treating wastes, knowledge of the compounds present is useful.