(a) The type of protective device required under this article shall be determined by the degree of hazard which exists as follows.
(1) Premises having auxiliary water supply shall protect the public system by either an approved air gap or an approved reduced pressure principle backflow prevention assembly.
(2) Premises having water or substances which would be nonhazardous to the health and well- being of the consumers shall protect the public system with no less than an approved double check valve assembly.
(3) Premises where material dangerous to health is handled in a manner which creates an actual or potential hazard shall protect the public system by an approved air gap or an approved reduced pressure principal backflow prevention assembly.
(4) Premises where cross-connections are uncontrolled shall protect the public water supply by installing an approved air gap or an approved reduced pressure principle backflow prevention device at the service connection.
(5) Premises where because of the security requirements or other prohibitions it is impossible to complete an inplant cross-connection inspection, the public system shall be protected by an approved air gap or an approved reduced pressure principle backflow prevention assembly.
(b) Premises which may fall into one or more of the above-mentioned categories may be, but are not limited to, the following:
(1) Beverage bottling plants;
(2) Buildings; hotels, apartments, public or private buildings, or other structures having actual or potential cross connections;
(3) Car wash facilities;
(4) Chemical manufacturing, handling or processing plants;
(5) Chemically contaminated water;
(6) Dairies and cold storage facilities;
(7) Film or photography processing laboratories;
(8) Fire systems;
(9) Hospitals, medical centers, morgues, mortuaries, autopsy facilities, clinics, or nursing and convalescent homes;
(10) Irrigation systems;
(11) Laundries;
(12) Metal cleaning, processing or fabricating plants;
(13) Oil and gas production, storage or transmission facilities;
(14) Packing or food processing plants;
(15) Paper and paper products plants;
(16) Power plants;
(17) Radioactive materials plants or handling facilities;
(18) Restricted or classified facilities;
(19) Rubber plants;
(20) Sand, gravel or asphalt plants;
(21) Schools or colleges;
(22) Sewage and storm drainage facilities and reclaimed water systems;
(23) Solar heating systems;
(24) Temporary service; fire hydrants, air valves, blow-offs and other outlets; and
(25) Water from marinas.
(2010 Code, § 232)