At such time as a premises connects to the sanitary system, all existing septic tanks, cesspools or any similar sewage treatment facility serving said premises shall be abandoned in the following manner:
(A) The sludge held in the facility, solid and liquid, shall be pumped out and disposed of in a legal manner. The sludge shall not be disposed of into the sanitary sewer system; and
(B) The facility shall be filled with sand and its top broken out.
(O.C. § 2.48)