Hazmat Emergency Response Procedures for CDL Drivers

When you're hauling hazardous materials and something goes wrong — a spill, a leak, a fire, or an accident — your response in the first few minutes can mean the difference between a manageable incident and a catastrophe. The Hazmat endorsement test heavily covers emergency response, and for good reason: drivers are the first line of defense. This guide covers the exact procedures you must follow. Practice with our free CDL practice tests.

The 9-Step Hazmat Emergency Response Procedure

When a hazmat incident occurs, follow these steps in order:

1. Park the vehicle away from populated areas, intersections, and drainage systems. If on a highway, pull as far off the road as possible. Turn off the engine and set the parking brake.
2. Check for injuries — yourself, passengers, and anyone else involved. Do not move seriously injured people unless they are in immediate danger from the hazmat.
3. Call 911 immediately. Report the incident, your location, and the type of hazardous material if you know it. Provide the UN number from your shipping papers.
4. Keep people away. Establish a perimeter around the scene. Do not allow bystanders, other drivers, or emergency personnel without protective equipment to approach the spill or leak.
5. Consult the Emergency Response Guidebook (ERG). Look up the material by name or UN number. The ERG tells you the recommended safe distance, protective actions, and whether to use water, foam, or dry chemical on a fire.
6. Do not smoke or allow ignition sources. If the material is flammable (Class 3, 2.1, 4.1, etc.), any spark can ignite vapors. Turn off vehicle engines in the area. Do not use road flares.
7. Do not attempt cleanup unless you are specifically trained and equipped with the proper Personal Protective Equipment (PPE). Wait for the hazmat response team.
8. Keep shipping papers accessible. When emergency responders arrive, they need to know exactly what you're carrying. Keep the shipping papers in the driver's side door pocket, on the driver's seat, or in a clearly marked container.
9. Notify the National Response Center at 1-800-424-8802 as soon as possible. This is required by federal law for any hazmat incident involving a spill, leak, fire, or injury/death.

The Emergency Response Guidebook (ERG)

The ERG is a DOT-published reference book that you must carry in your vehicle when transporting hazardous materials. It is updated every four years (current edition: 2024 ERG). The ERG is organized into color-coded sections:

• White pages (front): Introduction, how to use the guide, general safety precautions
• Yellow pages: Materials listed by UN/ID number. Find the material by its 4-digit UN number and get the Guide Page number.
• Blue pages: Materials listed alphabetically by name. Use this if you know the material name but not the UN number.
• Orange pages: The actual guide pages. Each guide provides potential hazards, public safety measures, and emergency response actions. This is the most critical section.
• Green pages: Table of initial isolation and protective action distances for toxic-by-inhalation materials (TIH) and water-reactive materials.

Spill and Leak Procedures

If you discover a leak or spill from your cargo:

• Stop the vehicle immediately in a safe location away from traffic and populated areas
• Identify the material using your shipping papers and the ERG
• Follow the ERG orange guide page for the specific material — it tells you the initial isolation distance
• Isolate the area: Keep all people at least the recommended distance away. For many materials, this is 100 feet in all directions. For toxic inhalation hazards, it can be much larger — up to half a mile or more
• Stay upwind and uphill from the spill. Vapors travel with the wind and liquids flow downhill
• Do not touch the material without proper PPE — even a small amount of some chemicals can be fatal through skin contact
• Do not use water to wash away a spill unless the ERG specifically recommends it — some materials react violently with water

Fire Procedures for Hazmat Loads

A fire involving hazardous materials is exponentially more dangerous than a standard vehicle fire. The procedure:

1. Evacuate immediately if the fire is near the hazmat cargo. Do not attempt to fight a fire involving hazardous materials unless you have specific training and equipment.
2. Move at least 1/4 mile away (or the distance specified in the ERG, whichever is greater). Some materials can explode or release toxic gases when exposed to fire.
3. Call 911 and report that hazardous materials are involved. This ensures the correct fire response (foam, dry chemical, or special agents) is dispatched.
4. Consult the ERG for the specific material. Some materials require foam, others require dry chemical, and some must be allowed to burn (water can make the situation worse).
5. Never use water on a Class 4.3 (dangerous when wet) material fire — water reacts with these materials and can produce flammable hydrogen gas.
6. Beware of BLEVE: Boiling Liquid Expanding Vapor Explosion. If a tank of liquefied gas is exposed to fire, it can violently rupture. The ERG specifies evacuation distances for BLEVE risk — often 1/2 mile or more.

Reporting Requirements

After the immediate emergency is under control, you have reporting obligations:

• Immediate notification: Call the National Response Center at 1-800-424-8802 for any incident involving a spill, leak, fire, or fatality/injury
• Carrier notification: Notify your carrier/dispatcher immediately with details of the incident
• Written report: If the incident involves a fatality, serious injury, or significant property damage, a written Hazardous Materials Incident Report (DOT Form F 5800.1) must be filed within 30 days
• Failure to report is a crime: Failing to report a hazmat incident can result in criminal prosecution, not just civil fines

What to Keep in Your Truck for Hazmat Emergencies

• Current edition of the Emergency Response Guidebook
• Shipping papers — kept in the door pocket or on the driver's seat while driving
• Fire extinguisher (minimum 10 BC rating, fully charged)
• Reflective triangles or flares (but never use flares near flammable materials)
• Flashlight with extra batteries
• Phone with the NRC number saved: 1-800-424-8802

Frequently Asked Questions