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• introduction of water borne disease organisms, or harmful chemical, physical, or <br /> radioactive substances into a public water system, and which presents an <br /> unreasonable risk to health. <br /> B. Medium Hazard a condition, device, or practice which is conducive to the <br /> introduction of any pollutant or contaminant into the public water system, even <br /> though the substance does not pose an immediate unreasonable risk to health. <br /> C. Low Hazard a hazard which could cause aesthetic problems or have a detrimental <br /> effect on the quality of the public potable water supply. <br /> 2.9 ENFORCEMENT ACTION <br /> Where backflow prevention is required, the Approving Authority shall require the <br /> problem to be eliminated or controlled by a properly installed, approved backflow <br /> prevention assembly. Such protective measures may include, but not be limited to, <br /> a backflow prevention assembly on the consumer's water service line. Every effort will be <br /> made to secure the voluntary cooperation in correcting cross connection hazards. If <br /> voluntary corrective action can not be obtained within a reasonable period of time, the <br /> water service shall be terminated. <br /> Section 3 <br /> PUBLIC WATER SYSTEMS <br /> 3.0 OTHER PUBLIC WATER SYSTEMS <br /> The Water System shall be protected as outlined in the Arkansas Department of Health <br /> publication, "Policies and Procedures for Backflow Prevention Devices Location and <br /> Installation" by an approved method of backflow prevention at the point of connection to <br /> the Water System if a public water supply other than the Water System is connected to the <br /> water system. Backflow prevention is required regardless of actual development or cross <br /> connection between the Water system and the other public water system. <br /> A. RPZA containment is required if the other water supply could be subjected to a� <br /> high hazard, or is not operated under the authority of the Arkansas Department of <br /> Health. <br /> B. DCVA Containment is required if the other water supply is being operated under <br /> the authority of the Arkansas Department of Health, and the owner of the supply <br /> can document that there are no potential high hazards on the premises. <br /> • 10 <br /> i <br /> i <br />