The permit holder shall apply for approval to close an underground storage tank and pay the closure fee as established by City Council no less than 30 days before closing the facility. Such closure shall be performed by a person holding a current license as an underground tank installer or on-site supervisor in accordance with the applicable rules and regulations of the Texas Water Commission or its Successor, and shall be in accordance with the closure plan included in the materials management plan for the facility, unless an addition to or modification of the closure plan is necessary, in which case the application for closure shall contain such addition(s) or modification(s). This 30-day period may be waived by the city for good cause. The final stage of the underground storage tank closure shall be witnessed by an inspector from the city. If reinspection is necessary due to improper closure, a reinspection fee as established by City Council shall be paid.