Which item is not included in PERC consumer safety material?

• A. The physical properties of propane
• B. A scratch and sniff to illustrate odorant
• C. How to turn off the propane supply valve(s)
• D. None of the above

Answer: (A)

Consumer safety materials focus on practical actions you can take and how to detect problems, not on technical chemistry details. The item about the physical properties of propane isn’t presented in PERC consumer safety material because homeowners don’t need those technical facts to stay safe at home. What’s included are useful safety aids and steps: a scratch-and-sniff demonstration to help you recognize the odorant added to propane so you can notice leaks, and clear instructions on how to shut off the propane supply valve(s) in an emergency. Since those practical safety elements are covered, the option referring to the physical properties is the one not included.