It shall be the responsibility of the water consumers of commercial and industrial water connections and consumers of new residential water connections, to purchase, install, test and maintain backflow prevention devices/assembly where necessary and to control cross connections. Commercial and industrial consumers shall have certified inspections and operational tests made at least once a year upon request by the City at the consumer's own expense. Where the City deems a hazard to exist, any water consumer may be required to have such inspections and tests completed at a more frequent interval and as prescribed by the City. All such tests shall be made according to the standard set forth by the Utah State Department of Health, Bureau of Drinking Water and Sanitation. (Ord. 91-02 § 3)