27-412. Dust control A. Every operator shall do everything reasonably within his power to encourage good practices in the use of any appliances for allaying dust. Each employee shall use such devices as are furnished by the operator. Employees shall not be allowed to work in hazardous dust or gas concentrations without approved respiratory and eye protection. B. In every operation where employees are exposed to hazardous dust conditions, some mechanical or other means which will alleviate this condition shall be used whenever and wherever practical. C. In dry places where the operation of a power drill produces dust, such dust shall be controlled either by wet drilling, spraying, or approved dust catching devices.
Arizona Legal Code