Chapter 1: Atmosphere 🔒

Phrase 1: toxic vapors

Phrase 2: toxic vapors present

Phrase 3: make sure no toxic vapors are present

Chapter 2: Non entry rescue 🔒

Phrase 1: self rescue

Phrase 2: preferred

Phrase 3: self rescue is preferred

Chapter 3: Gas meters 🔒

Phrase 1: Gas meter

Phrase 2: bump check

Phrase 3: bump check your gas meter

Bonus Chapter: Permit 🔒

Phrase 1: Permit

Phrase 2: confined space

Phrase 3: confined space permit