You've probably been warned to exercise extreme caution when working in close proximity to asbestos. But in order to fully appreciate why it's important to do so, you need to understand exactly what asbestos is and how it can affect your health. You should also know what training you need to stay safe. In this program, we'll talk all things asbestos. We'll go over where asbestos is found and asbestos-containing materials, or ACM. We'll also cover the permissible exposure limit or PEL for asbestos. Lastly, we'll talk about the four classes of asbestos work.