Upon arrival at a hazmat incident involving a truck carrying magnesium scrap and you cannot obtain the 4-digit number, where should you look FIRST in the ERG for guidance?

Upon arrival at a hazmat incident involving a truck carrying magnesium scrap and you cannot obtain the 4-digit number, where should you look FIRST in the ERG for guidance?

• A. Yellow-bordered section
• B. Green-bordered section
• C. Blue-bordered material index section
• D. Orange-bordered section

Answer: (C)

When you can’t read a 4-digit UN number, identify the material by name using the blue-bordered Material Index. This section is designed for exactly this situation: you look up the material (magnesium scrap) alphabetically and it will point you to the correct UN/guide number, which you then use to access the specific actions in the orange section. From there, you’d use the green section for protective action distances if needed. So the blue-bordered material index is the first place to look because it bridges the gap between a known material name and the exact guidance you need.

When you can’t read a 4-digit UN number, identify the material by name using the blue-bordered Material Index. This section is designed for exactly this situation: you look up the material (magnesium scrap) alphabetically and it will point you to the correct UN/guide number, which you then use to access the specific actions in the orange section. From there, you’d use the green section for protective action distances if needed. So the blue-bordered material index is the first place to look because it bridges the gap between a known material name and the exact guidance you need.