A highway spill of barium peroxide would require consulting which ERG guide?

• A. #42
• B. #39
• C. #54
• D. #7

Answer: (A)

Spills involving oxidizers require looking up the material in the ERG guide that specifically covers oxidizers and peroxides. Barium peroxide is an inorganic peroxide and functions as an oxidizer, meaning it can release oxygen and intensify fires or react with fuels and organics. The oxidizers guide in the ERG provides the hazard overview, recommended protective actions, PPE guidance, and general response steps appropriate for oxidizing solids like peroxides. That makes it the most appropriate reference for this scenario. Guides for acids, hydrocarbons, or other material classes wouldn’t address the unique hazards of an oxidizer spill, so they aren’t suitable here.