(a) If a person ordered to eliminate an imminent and substantial endangerment to the public health and safety or the environment has failed to do so within the time limits specified in the order or any extension of time approved by the commission, the commission may implement the remedial action program for the facility.
(b) The reasonable expenses of implementing the remedial action program by the commission shall be paid by the persons to whom the order was issued and shall be recoverable under Section 361.197.