Users subject to this chapter shall document all cleaning and maintenance activities performed on their GRS. These records shall be maintained for a minimum of three years and be available for inspection and copying by the director or his representative. This period shall be automatically extended for the duration of any litigation concerning the user or the POTW, or where the user has been specifically notified of a longer retention period required by the director. (Ord. 3071-08 § 4.1, 2008.)