Final answer:
The incorrect statement is that Level D protection is used in situations where there are no known hazards, whereas it actually provides the minimum protection but is not specific to chemical hazards.
Step-by-step explanation:
OSHA, the EPA, and other agencies classify protective clothing and equipment into four levels—A, B, C, and D—to safeguard against chemical hazards. Level A protection is the highest level and includes fully encapsulating, vapor-tight suits with self-contained breathing apparatuses (SCBA) for incidents with high risk of exposure to hazardous materials. Level B protection requires a SCBA or an airline respirator for potential splash hazards, but the suit is not vapor-tight. Level C protection includes the use of air-purifying respirators when the concentration and type of airborne substance are known and is less comprehensive than Level A or B. Finally, Level D protection provides the minimum protection, typically a work uniform without respiratory protection, for situations with no known hazards. The incorrect statement in the question is that Level D protection is used when there are no known hazards, as it generally provides the minimum level of protection but does not include personal protective equipment used specifically for chemical hazards.