Materials that may contain asbestos should be tested by an accredited inspector. If disturbed, the asbestos could enter your lungs, and cause diseases such as mesothelioma or lung cancer.
If the materials contain asbestos and might be disturbed, you should have them removed by an asbestos abatement company. Asbestos removal can be done in different ways depending on the type and location of material, and the ability of workers to safely access it.
Usually, the abatement contractor seals off the work area with plastic sheeting held in place with heavy tape and staples and ventilates the work area with specialized air handlers. The abatement workers enter the work area with respiratory protection and protective clothing. Generally, they remove the material and seal it in doubled heavy plastic bags. They sample the air at a variety of places including inside and outside the work area, and send those to a lab for testing. Once the air samples pass the tests, the workers return to the site to remove the plastic sheeting.