The F-list (40 CFR Part 261.31) identifies seven major categories of wastes from common manufacturing and industrial processes as hazardous.1,2,9 Because the processes generating these wastes occur in different sectors of industry, F-listed wastes are considered non-source specific wastes. With the possible exception of non-halogenated solvents such as acetone or xylene (EPA code F003 [I and T]), F-listed wastes are not likely to be found in oral healthcare facilities.1,2,9
The K-list identifies hazardous wastes from specific sectors of industry and manufacturing and, therefore, K-listed wastes are considered source-specific wastes.1,2,9 To qualify as a K-listed hazardous waste, the waste must fit into one of the 13 major categories on the list and the waste must match one of the detailed K-list waste descriptions (40 CFR Part 261.32).1,2,9 K-listed wastes are not likely to be found in oral healthcare facilities.
The P- and U-lists designate as hazardous waste pure and commercial grade formulations of certain chemicals.1,2,9 For a waste to be considered a P- or U-listed waste it must meet the following three criteria: (1) it must contain one of the chemicals listed on the P or U list; (2) the chemical in the waste must be unused; and (3) the chemical in the waste must be 100 percent pure, commercial grade, or the sole active ingredient in a formulation.
The P-list (40 CFR Part 261.33) identifies 239 acutely toxic hazardous wastes from discarded commercial chemical products. Examples of P-listed chemicals found in oral healthcare facilities include epinephrine (P042[H]) and nitroglycerin (P081[H and R]).1,2,9 The U-list (40 CFR Part 261.33) identifies 472 hazardous wastes. Examples of U-listed chemicals that may be found in oral healthcare facilities include formaldehyde (U122[T]) and phenol (U188[T]).1,2,9