A. If the secretary considers that an imminent hazard exists with respect to the transportation of a hazardous material, he may petition the district court in the parish in which the person sought to be enjoined resides or in the parish in which the danger exists for a restraining order to restrain that person from performing any act creating the hazard, or for any other order necessary to eliminate or ameliorate the hazard. Such actions may be taken without the necessity of posting bond, and actions taken by the secretary in good faith shall make him exempt from suit for civil damage.
B. For the purposes of this Section, an "imminent hazard" exists with respect to the transportation of hazardous materials, when the transportation may present an imminent and substantial endangerment to health or the environment.