During a refurbishment project, a contractor realizes that he may have drilled into some asbestos. What should the first action be? Select one: a. Special personal protective equipment and clothing must be issued b. The provision of local exhaust ventilation c. The total or partial enclosure of the process d. Good supervision and training

Select all the options that apply. What are the objectives of control methods? Select one or more: a. Protect workers safety and health when exposed to a chemical (s). b. Process elimination c. Protection of the workers comfort d. Reduce the use of any chemical that pose a risk for workers e. Substitution of hazardous chemical f. Reduction of environmental pollution.