All records relating to compliance with pretreatment requirements or standards shall be made available to officials of the EPA, state, and city, or their authorized representatives. These records shall be maintained for a minimum of three years from the date of the compliance report to which these records are applicable or three years from any investigation or enforcement action undertaken by the city, state or EPA has been concluded, except where there is unresolved litigation regarding the user or the city to which such records are relevant, in which cases the records will be retained until the litigation is concluded. (Ord. 01-102 § 2(part), 2001).