When a user's discharge, whether due to negligence, accident, spill or otherwise, causes an obstruction, damage or any other impairment to the city's operation or facilities, the city may impose a charge on the user for the cost incurred to clean or repair the facility, or to resume normal operations assessments or penalties including any fines imposed upon the city for violation of its discharge requirements directly resulting from the discharge. An administrative fee of twenty-five percent of the city's costs may be added to these charges. The total amount will be paid within forty-five days of invoicing by the city. (Ord. 01-102 § 2(part), 2001).