Industrial users shall maintain records of all information resulting from monitoring activities. Records shall be kept for a time period consistent with the requirements of 40 CFR 403.12(h) but in no case for a period of less than three years. Such records shall be made available for inspection and upon demand by the city, state and/or EPA. This period of retention shall be extended during the course of any unresolved litigation regarding the discharge of pollutants by the industrial discharger or the operation of the city's pretreatment program or when requested by the state or the Environmental Protection Agency. (Ord. 2006-02 (part), 2006: Prior code § 4280)