Definit Definition : Any actual Any actual or potentia or potential l physical physical connect connection between a on between a potable potable water water line line and and any any pipe, vessel, or pipe, vessel, or machine machine conta containing a ng a non-p non-potab table e fluid fluid or or has has the possibi the possibility ty of conta of containing ng a a non- non- potable fluid, gas, potable fluid, gas, or or solid such that solid such that it it is possible is possible for the for the non-po non-pota tabl ble fluid fluid to to enter enter the water system by the water system by backf backflow ow Defin Definition : Backs Backsiphona phonage The The unwa unwante ted flow of d flow of used or used or water line breaks, undersized piping, sudden supply pressure loss non-potabl non- ble wate water or othe r or other r (fire hydrant usage) substance substance, from , from any source back any source back Backpressure pressure into the distributi into the distrib tion piping of a on piping of a boilers, pumps, elevation potable water potabl e water suppl supply system. y system. Elements of a program Regulations • Adopt the Authority • IDAHO ADMINISTRATIVE CODE IDAPA 58.01.17 Ordinance, Resolution, or Bylaw Department of Environmental Quality Recycled Water Rules • Surveys - Degree of Hazard • Recommended Standards for Wastewater Facilities Great Lakes-Upper Mississippi River Board of State Sanitary Engineers Evaluate every location • Training to implement the program • AWWA Manual M24 Personnel to answer and ask questions Chapter 4 for dual water systems • Idaho Standards for Public Works Construction Current Edition 1
Elements of a program Elements of a program • Create public education program • Requirements for testing/inspecting to standards Public Meetings – News Paper Mailer – Radio - Television USC - FCCHR Procedures • Procedure for responding to a backflow incident • Develop and maintain a records program Notification – Isolation - Sampling History is Value Potable / Reuse Water Indicators (obvious) Both Require Backflow Prevention Prevent contamination with backflow prevention DATE OF BACKFLOW INCIDENT: September 1996 The problem happened in March 2002, when the LOCATION OF BACKFLOW INCIDENT: Hillsborough County, Brackenridge Golf Course switched its sprinkler Florida SOURCE(S) OF INFORMATION: system to "recycled water" ‐ water that's cleaned up at the city's sewage plants, but still not safe to drink. - Hillsborough County Water Department Apparently, the County's reclaimed water service connection to this residential premises had recently been hooked up to There was a valve ‐ a drinking valve ‐ that was not an existing irrigation system at the premises. The irrigation properly cut and capped. Consequently, when the system, which was previously supplied with water from the home's potable water system, was not disconnected from recycled water was turned on, some of that recycled the home's potable water system. water did get into the drinking water system. Furthermore, a backflow preventer was not installed at the County's potable water service connection to the premises. The problem affected the River Road neighborhood The County Water Department estimated that about 50,000 just behind the golf course. They were getting ill, a gallons of reclaimed water backflowed into the public potable water system. lot of digestion and intestinal problems and diarrhea. 2
June 2004 ... Gold Coast W ater and other state agencies are investigating a contam ination incident in w hich recycled w ater w as pum ped into 6 3 0 hom es tw o w eeks ago. The Bulletin last week revealed that a second major contamination happened at the same Pimpama plant late last year. The potential for More than 3 7 5 council w orkers, contractors and visitors w ere exposed to w ater quality, hazardous cross-connections ranging betw een Class B and D can be expected to increase where reuse and potable systems are close together Allen Wilder Backflow Assembly Testing & Supply LLC (208) 456 - 2287 bftest@ida.net Ultimate GOAL 3
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