1. In order to fight a fire at a hazardous materials spill site, caution should be exercised when choosing a fire extinguishing method. Give two examples where application of water to a fire may actually do more harm than good. Be specific with your examples, and explain the alternative to use of water.

2. See the following statement: "ABOVE ALL: Do not assume that gases or vapors are harmless because of lack of a smell- odorless gases or vapors may be harmful. Use CAUTION when handling empty containers because they may still present hazards until they are cleaned and purged of all residues." List at least three instances in which odorless gases or vapors harmed hazardous materials workers.

3. List and discuss two factors that can change or increase protective action distances.

4. Describe at least three ORM-D-Other Regulated Materials, and describe how their transportation requirements differ from more hazardous materials.

5. Describe what challenges a responder would face from a chemical spill of a water reactive material that produces a toxic inhalation hazard (TIH) in a stream or river, and what actions you would take to protect yourself and the public.