(a) Before installing fertilizer facilities for the distribution or storage of anhydrous ammonia or low-pressure nitrogen solutions, the owner shall apply to the Department for approval of the location of the facilities. Distribution and storage facilities shall be in compliance with local zoning ordinances and the minimum distance requirements for safe storage of anhydrous ammonia or low-pressure nitrogen solutions as established by Department rule. Existing storage tanks installed prior to the effective date of this amendatory Act of 1983 shall be exempt from the requirements for location approval. Prior to any expansion or modification of such existing storage tanks, written approval shall be obtained from the Department and such tanks shall meet current requirements as established by Department rule.
     (b) Authorized Department personnel may enter upon any public or private premises during reasonable business hours and inspect facilities, equipment and vehicles used in the storage, application, and distribution of anhydrous ammonia and low-pressure nitrogen solutions and observe operations as necessary to determine compliance with the provisions of this Act and the rules promulgated hereunder. Department personnel may enter the premises at any time when the health, safety or welfare of the public is threatened by escaping gas, spills, fire, damaged or faulty equipment, accident or act of God.
     (c) It shall be unlawful for any entity to distribute, store, transport, or use anhydrous ammonia or low-pressure nitrogen solutions in violation of this Act or the rules adopted by the Department or to violate a stop use order issued by the Director.
     (d) The Director or his authorized agent may issue and enforce a written stop use order to the owner or custodian of the facility upon a violation of this Act or the rules and regulations. The Director shall terminate the stop use order upon compliance with the requirements of this Act and rules and regulations.
     (e) (Blank).
     (f) Nothing in this Section shall apply to facilities that manufacture anhydrous ammonia subject to the OSHA Process Safety Management regulations cited under 29 C.F.R. § 1910.119.