Which of the following pages in the ERG index hazardous materials in numerical order of their 4-digit ID numbers?

The correct choice is the yellow-bordered pages in the Emergency Response Guidebook (ERG). These pages are specifically designed to list hazardous materials in numerical order, based on their 4-digit ID numbers. This organization allows first responders to quickly locate information about specific substances in an incident scenario, facilitating efficient and effective emergency responses.

The yellow-bordered section streamlines the process of identifying hazards and appropriate safety measures for the hazardous materials involved. This is particularly important during emergency situations where time is critical and first responders need quick access to essential information regarding the risks and necessary actions associated with different materials.

Other sections of the ERG, such as the blue-bordered pages, are organized alphabetically by the name of the material, which is useful for accessibility but does not address the need for numeric ordering by ID. The orange-bordered pages contain general information on the material's properties, emergency handling, and response actions, while the green-bordered pages focus on isolation distances and protective clothing recommendations. These pages serve different purposes, reinforcing the importance of a systematic approach to identifying hazards for effective emergency management.