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Listed Waste

Is Your Solid Waste a Listed Waste?

EPA's four types of listed hazardous wastes include;

F-listed wastes: The F list includes wastes from common industrial processes. Because they are not specific to one type of industry, they are called wastes from non-specific sources. This list includes for example many types of spent (or used) solvents. See 40 CFR 261.31 to see if your waste is F-listed.

K-listed wastes: The K list includes wastes from specific industrial processes, such as wood preservation, organic chemical production, and pesticide manufacturing. See 40 CFR 261.32 for the complete list of manufacturing process wastes to see if your facility might have a K-listed waste.

P- and U-listed wastes: These two lists designate certain commercial chemical products as hazardous when disposed of unused. These unused chemicals may become wastes in a number of ways. Some can be spilled while in use, while others can be intentionally discarded if out of specification.

For waste to qualify as a P or U listed waste, it must meet all three of the following criteria: The formulation must contain at least one chemical on the P or U list. The chemical in the waste must be unused and the chemical in the waste must be in the form of a commercial chemical product (CCP), which is a chemical that is of technical (commercial) grade, 100% pure, and the only active ingredient in the formulation.

There are hundreds of P- and U-listed wastes in 40 CFR 261.33. Chemicals with the "P" code are acutely hazardous. P chemicals posses extremely hazardous properties, which makes the chemicals lethal in very small quantities. Generators with acutely hazardous waste are subject to different accumulation limits for P wastes. If a facility generates a single P waste at a rate greater than 1 kg/month, the facility is regulated as a large quantity generator (LQG). The U list chemicals are regulated at a regulatory threshold of 100 kg/month. A facility generating a U listed waste greater than 100 kg/month to 1000 kg/month is regulated as a small quantity generator (SQG).

U- Listed wastes are generally the result of a spills/leaks or disposal of pure chemical, such as acrylamide, acrylic acid, formaldehyde, methanol, ethylene dichloride, methyl chloride, and methyl methacrylate to name few.

A simple method to help make a determination on whether a material is a listed is by examining the container's label. If the container's label uses one of the generic chemical names from the list to describe the contents of the container, the material is a listed waste. However if the label does not use a name or term on the P or U-list, the material is probably not listed.) Waste generated during either storage or transfer of a CCP (P or U listed) before entering the first step of a manufacturing process will carry the associated P or U listed code. Once a P or U listed CCP is in the manufacturing process any subsequently generated process wastes will not carry the P or U listing. The process waste generated may be a K or F listed waste or a D characteristic waste.

Is the solid waste a listed waste (F, K, P, or U waste)?

If YES - the waste is a listed and subsequently regulated under RCRA Subtitle C.

If NO - go to Characteristic Waste Page

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Last modified: Nov, 2017

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