Appendix A

question 3

Essay

Appendix A.1 lists "Copper fumes" as having a TWA limit of .1 mg/m³.The corresponding PEL in the ppm column is blank.Explain why no ppm PEL is available for copper fumes.

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Definitions:

Unconditioned Response

An involuntary, inherent reaction to a stimulus, occurring without any learned or conditioned prior history.

Unconditioned Response

An automatic and natural reaction to a stimulus that does not require learning.

Increased Heartbeat

A condition where the heart rate speeds up, typically in response to exercise, stress, or excitement.

Positive Reinforcement

A process in behavior modification that involves giving a reward to reinforce a desired behaviour, encouraging its repetition.