Any person, firm, or corporation responsible for any unauthorized (including accidental) discharge shall institute and complete all actions necessary to remedy the effects of such unauthorized discharge, whether sudden or gradual, with the cost borne by the discharger. When deemed necessary by the city, identification and clean-up may be initiated by the city or by an authorized individual or firm. All cost associated with such clean-up, plus the current city administrative and overhead cost, shall be borne by the owner, operator or other person responsible for the unauthorized discharge. These costs will be administratively imposed by the city. In the event that the clean-up costs are less than the cost of legal disposal, an administrative penalty will be levied. The mandatory minimum penalty will be the difference between the cost of legal disposal and the actual cleanup cost. This mandatory minimum penalty shall be cumulative to other potential penalties and enforcement remedies. (Ord. 2282 NCS §3 (part), 2007.)