This number, developed by federal EPA, is to identify the hazardous waste handler.
Hazardous waste is categorized into two types.
One is called RCRA and is regulated by the federal government. RCRA stands for Resource Conservation and Recovery Act. This law lists specific types of hazardous waste. The other type of hazardous waste in California is called non-RCRA waste. U.S. EPA issues numbers for generators, transporters, and TSDFs handling RCRA wastes.