CHAPTER 25 Objectives 1 of 3 Identify the nine hazard classes as defined by DOT. Identify the hazards associated with each hazard class. Identify the standard occupancies where hazardous materials may be used and stored.
CHAPTER 25 Objectives 2 of 3 Identify the standard container shapes and sizes and common products. Identify both facility- and transportation- related markings and warning signs. Identify the standard transportation types for highway and rail.
CHAPTER 25 Objectives 3 of 3 Explain the NFPA 704 System. Explain the use of transportation containers in identifying possible contents. Explain the location of emergency shutoff valves on highway containers. Explain the importance of understanding chemical and physical properties of hazardous materials.
CHAPTER 25 Introduction Four basic clues to recognition and identification: Location and occupancy. Placards, labels, and markings. Container types. The use of senses.
CHAPTER 25 Location and Occupancy Average home has a large amount of hazardous materials. Rural communities and farms have unique risks. Hazardous materials storage. Businesses present a wide range of risks.
CHAPTER 25 Senses Vision and hearing are acceptable senses in investigating potential chemical releases. Sensory clues from others are useful. Many toxic materials can be harmful if touched.
CHAPTER 25 Chemical and Physical Properties States of matter. Vapor pressure. Vapor density. Specific gravity. Corrosivity. Chemical reactivity. Flashpoint. Autoignition temperature. Flammable range. Toxic products of combustion.
CHAPTER 25 Wrap-Up Ability to recognize hazardous materials is important. Memorization is not important, but knowing how to access information is. Physical properties of chemicals will affect how they react and should be managed. Firefighters must be able to use available resources.