Backflow prevention assemblies shall be installed at the service connection or within any premises where in the judgment of the water operator the nature and extent of activity on the premises, or the materials used in connection with the activities, or materials stored on the premises would present an immediate and dangerous hazard to health should a cross connection occur, even though such cross connection does not exist at the time the backflow prevention device is required to be installed. This includes:
A. Premises having auxiliary water supply.
B. Premises having internal cross connections that are not correctable or intricate plumbing arrangements that make it impractical to ascertain whether or not cross connections exist.
C. Premises where entry is restricted so that inspections for cross connections do not exist.
D. Premises where materials of a toxic or hazardous nature are handled such that if back siphonage should occur, a serious health hazard may result.
E. The following types of facilities require mandatory service protection, including, but not limited to:
1. Hospitals;
2. Laboratories;
3. Sewage treatment plants;
4. Food or beverage processing plants;
5. Chemical plants using a water process;
6. Metal plating industries;
7. Petroleum processing or storage plants;
8. Radioactive material processing plants or nuclear reactors;
9. Car washes;
10. Hot water and steam boilers for individual, commercial and industrial uses;
11. Others specified by the district manager. (Ord. 173, 2-13-2013)