Final answer:
Solvent waste, oily rags, and flammable liquids must be stored in an approved storage locker in accordance with EPA guidelines to manage hazardous waste safely.
Step-by-step explanation:
Items such as solvent waste, oily rags, and flammable liquids need to be kept in an approved storage locker until they are removed from the site. Hazardous waste includes those substances that may be harmful to human health or the environment and requires careful handling. The Environmental Protection Agency (EPA) has created specific guidelines for the management of hazardous waste, including its storage, to reduce the risk of spills, leaks, fires, or contamination. Safe storage in an approved locker helps protect workers and the environment from the potential dangers of characteristic hazardous wastes, which exhibit toxicity, corrosivity, flammability, or reactivity.