Chap+18+Environmental+Regulations++Hazardous+Substances+and+Wastes

Environmental Regulations : Hazardous Substances and Wastes

**Please start on the first page of this chapter Listed as Environmental Regulation Hazardous Substance and Waste** (No Chapter 18)



Hazardous Substances

[|Environmental Regulations] This is an important link. It will bring you to all the Environmental Regulations. If you are planning on taking the exam I would suggest committing them to memory.



When are identify substances as hazardous or toxic? Factors to consider when identifying a substance as hazardous or toxic? Is the substance:
 * Historically substances get identified after they have caused a problem
 * examples DDT Asbestos Lead in paint & gasoline
 * toxic
 * flammable
 * corrosive
 * explosive
 * mutagen

The goal of all environmental regulations is to control and /or stop pollution and environmental degregation. There is an economic consideration when shutting down an industry; if the government shuts down a company, that company will not be around to help pay for the clean up.

**[|__Hazardous Substances and Hazardous Waste__]**

**[|**__Common Contaminants__**]**

**__[|The Superfund Cleanup Program]__** **__﻿__** **__[|Common Cleanup Methods]__**

**__Top Ten Hazardous Substances__**

1. ARSENIC 2. LEAD 3. MERCURY 4. VINYL CHLORIDE 5. POLYCHLORINATED BIPHENYLS 6. BENZENE 7. POLYCYCLIC AROMATIC HYDROCARBONS 8. CADMIUM 9. BENZO(A)PYRENE 10 BENZO(B)FLUORANTHENE

**Answer the following Questions:** **1. Distinguish between acute and chronic toxicity.**

**2. Explain the problems associated with hazardous-waste dump sites and how such sites are developed.**

**3. Explain how hazardous substances contaminate ground water?**

**4. What is meant by pollution prevention and waste minimization?**

**5. Give two reasons why regulation hazardous wastes is difficult?**

**6. Describe the pollution-prevention hierarchy.**

**7. How might a company benefit from enacting an environmental management system?**

**8. What are RCRA and CERCLA? Why is each important for managing hazardous wastes?** **10. Scientist at the EPA have to make decisions about thresholds in order to identify which materials are toxic. What thresholds would you establish for various toxic materials? Explain your reasoning for the thresholds you set.** **11. Go to the [|EPA's website]** **and identify the major** releaser's of toxic materials in our area?