Which statement is true regarding TLV/TWA and OSHA PEL?

Which statement is true regarding TLV/TWA and OSHA PEL?

• A. False
• B. True
• C. Not always
• D. It depends on context

Answer: (B)

Both TLV/TWA and OSHA PEL relate to how much chemical a worker can be exposed to over a period of time. TLV/TWA is a guideline (threshold limit value expressed as a time-weighted average, usually over an 8-hour shift) published by a professional body to help assess risk. OSHA PEL is a legally enforceable exposure limit set by regulation. The important common thread is that each provides a time-weighted average exposure limit used to gauge safety over a workday. They may differ in exact values and in enforceability, but the idea of capping average exposure over a typical shift is the shared concept, which makes the statement true.

Both TLV/TWA and OSHA PEL relate to how much chemical a worker can be exposed to over a period of time. TLV/TWA is a guideline (threshold limit value expressed as a time-weighted average, usually over an 8-hour shift) published by a professional body to help assess risk. OSHA PEL is a legally enforceable exposure limit set by regulation. The important common thread is that each provides a time-weighted average exposure limit used to gauge safety over a workday. They may differ in exact values and in enforceability, but the idea of capping average exposure over a typical shift is the shared concept, which makes the statement true.