Environmental Scientist Practice Test

When hazardous waste is created from discarded products, it’s classified into lists that describe the source and level of hazard. Unused pharmaceuticals become hazardous waste when discarded just like other commercial chemical products. Among the waste lists, the P-list is the category for discarded commercial chemical products that are acutely hazardous—those with immediate health risks if mishandled or released. Because many pharmaceuticals pose strong acute hazards, unused drugs are best matched to the P-list. The other lists cover different types of wastes: the F-list includes wastes from non-specific manufacturing sources like solvents, the K-list covers specific industrial waste streams, and the U-list contains other discarded commercial chemical products that are toxic but not necessarily acutely hazardous.