Okaloosa County BOCC — August 2, 2016 — proposed Water & Sewer Ordinance (tracked changes version) — reading text

polluted in a form or concentration that would constitute a health, system, pollution or plumbing hazard if introduced into the public potable water system. These may include but shall not be limited to; polluted or contaminated water; all types of process waters and used water originating from the public potable water system that may have deteriorated in sanitary quality; chemicals in fluid form; plating acids and alkalis; circulating cooling waters connected to an open cooling tower; or cooling towers that are chemically or biologically treated or stabilized with toxic substances; contaminated natural waters, such as wells, springs, streams, etc.; oils, gases, glycerin, paraffins, caustic and acid solutions; and other liquid and gaseous fluids used in industrial or other purposes, including firefighting purposes. Isolation means protection of the customer's internal plumbing system by the installation of devices to prevent backflow from potentially hazardous cross connections. Pollutant means any foreign substance in water that tends to degrade its quality so as to constitute a non-health hazard or impair the usefulness of the water, or any chemical, matter or material that may change the color of, or add odor to the water. Pressure vacuum breaker means a pressure vacuum breaker is similar to an atmospheric vacuum breaker except that the checking unit "poppet valve" is activated by a spring. This type of vacuum breaker does not require a negative pressure to react and can be used on the pressure side of a valve. Public water supply means any system or water supply intended or used for human consumption or other domestic use, including source, treatment, storage and distribution where water is furnished to any community, collection or number of individuals, or is made available to the public for human consumption or domestic use, but excluding supplies serving one single-family residence. Reduced pressure principle backflow prevention device means a device incorporating two or more check valves and an automatically operating differential relief valve located between the two check valves, two shutoff valves and equipped with necessary appurtenances for testing. The device shall operate to maintain the pressure in the zone between the two check valves, less than the pressure of the public water supply side of the device even at cessation of normal flow. In case of leakage of each check valve, the differential relief valve shall operate to maintain this reduced pressure by discharging to the atmosphere. When the inlet pressure is two pounds per square inch or less, the relief valve shall open to the atmosphere, thereby providing an air gap in the device. This air gap shall also be above the 100-year flood level. Page 72 of 118 Sec. 24-345. - Responsibilities of department, customers. (1) The Okaloosa County Water and Sewer Department is responsible for the protection of its public potable water distribution system from backflow of contaminants or pollutants through any water service connection. If, in the judgment of the department, an approved backflow prevention device is required at the water service connection to any of its customer's premises for the safety of the users of the water system, the department shall give notice in writing to the customer that an approved backflow prevention device shall be installed at the customer's expense. Once installed, the backflow prevention device shall be owned by the customer, and the customer shall be responsible for all necessary maintenance and repair. (2) Failure, refusal or inability on the part of the customer to meet the department's time schedule for installation of such device or devices shall constitute grounds for discontinuance of water service until such device or devices have been properly installed. Any licensed plumber may install the proper device in the correct manner. (3) Compliance testing after initial installation of a backflow prevention device shall be performed by the department. (4) In the event of any known or suspected accidental pollution or contamination of the customer's or the department's potable water system, the customer shall promptly take steps to confine any further spread of pollution or contamination and shall immediately notify the department of the situation. Sec. 24-346. - Backflow prevention devices required. (1) Questionable water supply. When premises having an auxiliary water supply which is not or may not be of safe bacteriological or chemical quality and which is not acceptable as an additional source to the Okaloosa County Water and Sewer Department and it is determined that a potential cross connection exists, then such premises shall have an approved reduced pressure principle backflow prevention device installed in order to protect the public water supply against backflow. (2) Objectionable water or substances. For all premises where there is water or substances that could be objectionable but not hazardous to health, if introduced into the public water system, the public water system shall be protected by an approved double check valve assembly, or an approved vacuum breaker. (3) Dangerous material or substances. For all premises where there is any material dangerous to health, or which is handled in such a fashion as to create an actual or potential hazard to the public water system, the public water system shall be protected by an approved reduced pressure principle backflow prevention device. Examples of premises where these conditions have been found to exist include sewage treatment plants, sewage pumping stations, chemical manufacturing plants, hospitals, mortuaries and plating plants. (4) Uncontrolled cross connections. For all premises where there are "uncontrolled" cross connections, either actual or potential, the public water system shall be protected by an approved reduced pressure principle backflow prevention device. (5) Survey not performed. For all premises where security requirements or other prohibitions or restrictions make it impossible or impractical to perform a complete in-plant cross connection survey, the public water system shall be protected with an approved reduced pressure principle backflow prevention device. (6) Premises higher than two stories. For all non single-family residential premises more than two stories high (excluding basements), the public water system shall be protected by an approved double check valve assembly, unless otherwise dictated by Section 24-346 (8). (7) Installation requirements. a. All backflow prevention devices shall be installed at a location designated by the Okaloosa County Water and Sewer Department. Generally, this will be immediately on the customer's side of the meter. If circumstances make this location impractical, then the backflow prevention device may be placed further Page 73 of 118  downstream from the meter. However, any piping between the meter and the backflow prevention device must be either exposed or readily accessible for inspection. Double check (D.C.) valves and reduced pressure principle (R.P.) backflow prevention devices shall be installed 12 inches above finished grade. b. A reduced pressure principle assembly shall not be installed upstream of a fire line pump. c. Reduced pressure principle backflow prevention assemblies shall be installed with no plug or additional piping affixed to the pressure differential relief valve port, except for specifically designed funnel apparatus available from the manufacturer, and with the pressure differential relief valve port a minimum of 12 inches above finished grade. Consideration should also be given to the possibility of occasional venting of the relief port. The assembly shall therefore not be installed too close to electrical circuit breaker boxes or any other location where the vented water might cause damage or become a hazard. d. Each backflow assembly shall be installed at a location that allows easy access to the assembly for maintenance, testing and repair. It is the responsibility of the customer to protect the assembly from freezing. e. In all cases, backflow assemblies intended for containment purposes as defined in this article shall be installed before the first branching of the water service line intended to be protected by the assembly. f. No bypass piping shall be allowed around any backflow prevention assembly unless the bypass is equipped with the same level of backflow protection. g. No reduced pressure principle backflow prevention assembly shall be installed in any box, vault or pit below grade, with or without provisions for drainage. The assembly itself can become a cross connection if the relief port sticks open and the pit becomes flooded. h. No backflow prevention assembly shall be installed bolted flange to flange to a county water meter. i. All double check and reduced pressure principle backflow prevention assemblies shall be installed in a horizontal orientation unless a different orientation is specifically approved in advance by the director of the water and sewer department. (8) Types of facilities. The following types of facilities shall normally require the designated backflow prevention devices. This list is presented as a guideline and should not be construed as being final or complete. Each case will be judged on its own merit. (a) Types of Protection: (1) R.P. Reduced pressure principle backflow prevention device (2) D.C. Double check valve assembly (3) V.B. Vacuum breaker (type to be designated) Page 74 of 118  (b) Type of Facility Type of Protection Ice cream and dairy products D.C. Car wash R.P. Chemical plant R.P. Film lab or development R.P. Food or beverage processing plant D.C. Hospitals, clinics, and medical buildings R.P. Laboratories R.P. Laundries or dry cleaners D.C. Machine tool plants (health hazard) R.P. Machine tool plants (no health hazard) D.C. Metal plating plants R.P. Morgues, mortuaries or autopsy facilities R.P. Multistory buildings, non single-family residential D.C. Packing houses R.P. Paper product plants R.P. Pesticide and herbicide exterminations R.P. Petroleum processing plants R.P. Petroleum storage plant or yard (health hazard) R.P. Petroleum storage plant or yard (no health hazard) D.C. Pharmaceutical or cosmetic plants R.P.