2010 JANUARY - Laserfiche WebLink

14.16.030 health through poisoning or through the spread of dis- ease. H. "Cross- connection" means any physical connection or arrangement of piping or fixtures between two otherwise separate piping systems one of which contains potable water and the other nonpotable water or industrial fluids of questionable safety, through which, or because of which, backflow or back- siphonage may occur into the potable water system. A water service connection between a public potable water distribution system and a customer's water distribution system which is cross- connected to a contaminated fixture, in- dustrial fluid system or with a potentially contaminated supply or auxiliary water system, constitutes one type of cross - connection. Other types of cross- connections in- clude connectors such as swing connections, removable sections, four -way plug valves, spools, dummy sections of pipe, swivel or changeover devices, sliding muttiport tube, solid connections, etc. L "Cross- connections, controlled" means a connection between a potable water system and a non - potable water system with an approved backflow pre- vention device properly installed that will continuously afford the protection commensurate with the degree of hazard. J. "Cross- connection control by containment" means the installation of an approved backflow preven- tion device at the water service connection to any cus- tomer's premises where it is physically and economi- cally infeasible to find and permanently eliminate or control all actual or potential cross - connections within the customer's water system; or, it shall mean the instal- lation of an approved backflow prevention device on the service line leading to and supplying a portion of a cus- tomer's water system where there are actual or potential cross - connections which cannot be effectively elimi- nated or controlled at the point of cross - connection. K. "Operations services director." the opera- tions services director as head of the water and utilities department of the city is invested with the authority and responsibility for the implementation of an effective cross - connection control program and for the enforce- ment of the provisions of this ordinance. L. "Double check valve assembly" means an assembly of two independently operating approved check valves with tightly closing shut -off valves on each side of the check valves, plus properly located test cocks for the testing of each check valve. The entire assembly shall meet the design and performance specifications and approval of a recognized and city - approved testing agency for backflow prevention devices. To be ap- (Pleasanton Supp. No. 3, I -10) 386 proved, these devices must be readily accessible for in- line maintenance and testing. M. "Hazard, degree of' is derived from an evaluation of the potential risk to public health and the adverse effect of the hazard upon the potable water sys- tem. N. "Hazard, health" means any condition, de- vice or practice in the water supply system and its opera- tion which could create, or in the judgment of the opera- tions services director may create a danger to the health and well -being of the water consumer. An example of a health hazard is a structural defect, including cross - connections, in a water system. O. "Hazard, plumbing" means a plumbing type cross- connection in a customer's potable water system that has not been properly protected by a vacuum breaker, air -gap separation or backflow prevention de- vice. Unprotected plumbing type cross- connections are considered to be a health hazard. P. . "I Iazard, pollutional" means an actual or potential threat to the physical properties of the water system or to the potability of the public or the con- sumer's potable water system but which would consti- tute a nuisance or be aesthetically objectionable or could cause damage to the system or its appurtenances, but would not be dangerous to health. Q. "Hazard, system" means an actual or poten- tial threat of severe damage to the physical properties of the public potable water system or the consumer's pota- ble water system or of a pollution or contamination which would have a protracted effect on the quality of the potable water in the system. R. `Industrial fluids system" means any system containing a fluid or solution which may be chemically, biologically or otherwise contaminated or polluted in a form or concentration such as would constitute a health, system, pollutional or plumbing hazard if introduced into an approved water supply. This may include, but not be limited to: polluted or contaminated waters; all types of processed waters and "used waters" originating from the public potable water system which may have deteriorated in sanitary quality; chemicals in fluid form; plating acids and alkalis, circulated cooling waters con- nected to an open cooling tower and /or cooling towers that are chemically or biologically treated or stabilized with toxic substances; contaminated natural waters such as from wells, springs, streams, rivers, bays, harbors, seas, irrigation canals or systems, etc.; oils, gases, glyc- erine, paraffins, caustic and acid solutions and other liquid and gaseous fluids used in industrial or other pur- poses or for firefighting purposes.