All users subject to this chapter shall retain and preserve for no less than three years, any records, books, documents, memoranda, reports, correspondence and any and all summaries thereof, related to monitoring, sampling and chemical analyses made by or in behalf of any user in connection with its discharge. All records which pertain to matters which are the subject of administrative adjustment or any other enforcement or litigation activities brought by the City pursuant hereto shall be retained and preserved by the user until all enforcement activities have concluded and all periods of limitations with respect to any and all appeals have expired.
(1980 Code 50.33)