(A) Premises having an auxiliary water supply;
(B) Premises on which, in the opinion of the Superintendent, substances are handled in a manner as to create an actual or potential hazard to the public water supply;
(C) Premises having existing or potential internal cross-connections;
(D) Premises where, in the opinion of the Superintendent, it is impossible or impractical to make a complete cross-connection premises survey;
(E) Premises having more than one customer service pipe.