The disposal of industrial solid waste streams to landfills often requires characterization of the waste to differentiate hazardous from non-hazardous wastes. The USEPA has established (under RCRA) procedures for determining hazardous characteristics: The Toxicity Characteristic Leaching Procedure (TCLP) and Synthetic Precipitation Leaching Procedure (SPLP). Many waste companies also have instituted specific test regimens before acceptance of wastes for disposal.
