Which reference standard is specifically mentioned in Informational Note No. 2 for information on the classification of locations at petroleum facilities?

• ANSI/API RP 500-2012
• NFPA 70E-2015
• NFPA 497-2012
• NFPA 30-2015, Flammable and Combustible Liquids Code
• ISA-12.10-1988