The public health authority may exercise, for such period as the state of public health emergency exists, the following powers over facilities or materials:

(a) Facilities. To close, direct and compel the evacuation of, or to decontaminate or cause to be decontaminated any facility of which there is reasonable cause to believe that it may endanger the public health.

(b) Materials. To decontaminate, or cause to be decontaminated, or destroy any material of which there is reasonable cause to believe that it may endanger the public health.