In the case of premises having a:
(A) Internal cross-connections that cannot be permanently corrected or controlled; or
(B) Intricate plumbing and piping arrangements or where entry to all portions of the premises is not readily accessible for inspection purposes, making it impracticable or impossible to ascertain whether or not dangerous cross-connections exist, the public water system shall be protected against backflow from the premises by installing an approved backflow preventer in the service line. In the case of any premises where there is any material dangerous to health that is handled in such a manner that, in the opinion of the utility, could create an actual or potential hazard to the public water system, an approved air-gap separation or an approved reduced-pressure principle assembly shall protect the public water system. Examples of premises where these conditions will exist include sewage treatment plants, hospitals, mortuaries, plating plants, and car wash establishments. In the case of any premises where, in the opinion of the utility, an undue health threat is posed because of the presence of toxic substances, the utility may require an approved air gap or reduced pressure principle assembly at the service connection to protect the public water system. This requirement will be at the discretion of the utility.
(Ord. 2670, passed - -)