content_image/738085.jpg
<img src='content_image/738085.jpg'>

## Classes of Hazardous Materials 

Hazardous materials are categorized into nine major hazard classes and additional categories for consumer commodities and combustible liquids. The classes of hazardous materials are listed in Figure 9.12. 

## Subsections 9.6 and 9.7 Test Your Knowledge 

1. If your placarded trailer has dual tires, how often should you check the tires? 

2. What is a safe haven? 

3. How close to the traveled part of the roadway can you park with Division 1.2 or 1.3 materials? 

4. How close can you park to a bridge, tunnel, or building with the same load? 

5. What type of fire extinguisher must placarded vehicles carry? 

6. You’re hauling 100 pounds of Division 4.3 (dangerous when wet) materials. Do you 

7. At a rest area you discover your hazardous materials shipments slowly leaking from the vehicle. There is no phone around. What should you do? 

8. What is the Emergency Response Guide (ERG)? 

These questions may be on your test. If you can’t answer them all, re-read subsections 9.6 and 9.7. 

## 9.8 – Hazardous Materials Glossary 

This glossary presents definitions of certain terms used in this section. A complete glossary of terms can be found in the federal Hazardous Materials Rules (49 CFR 171.8). You should have an up-to- date copy of these rules for your reference. 

(Note: You will not be tested on this glossary.) 

Sec. 171.8 Definitions and abbreviations. 

Bulk packaging  – Packaging, other than a vessel, or a barge, including a transport vehicle or freight container, in which hazardous materials are loaded with no intermediate form of containment and which has: 

1. A maximum capacity greater than 450 L (119 gallons) as a receptacle for a liquid; 

2. A maximum net mass greater than 400 kg (882 pounds) or a maximum capacity greater than 450 L (119 gallons) as a receptacle for a solid; or 

3. A water capacity greater than 454 kg (1000 pounds) as a receptacle for a gas as defined in Sec. 173.115. 

Cargo tank  - A bulk packaging which: 

1. Is a tank intended primarily for the carriage of liquids or gases and includes appurtenances, reinforcements, fittings, and closures (for "tank", see 49 CFR 178.345-1(c), 178.337-1, or 178.338-1, as applicable); 

2. Is permanently attached to or forms a part of a motor vehicle, or is not permanently attached to a motor vehicle but which, by reason of its size, construction, or attachment to a motor vehicle is loaded or unloaded without being removed from the motor vehicle; and 

3. Is not fabricated under a specification for cylinders, portable tanks, tank cars, or multi-unit tank car tanks. 

need to stop before a railroad-highway crossing? 

