Conducting Residential Cross Connection Inspections

Transcription

1 Michigan Backflow Prevention Association Annual Conference Conducting Residential Cross Connection Inspections Presented by: Dave Cardinal

2 We ve never had a problem, why do we need to do something now?

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8 Backflow Incident at a Swimming Pool Due to a cross contamination incident with a customer s swimming pool, the Liddieville Water System issued a boil water advisory for all 441 connections in Franklin Parish. The problem has been corrected and system personnel are flushing the system. Samples are planned to be collected on Monday the 6th with results anticipated from the Shreveport lab on Wednesday the 8th. A resident called the Louisiana Department of Health and Human Services to report her family being ill with bacteriological infections. Her suspicions stemmed from the Liddieville Water System as being the source of their problems. The resident stated that their water began smelling and that it had been occurring for quite a while. The resident also stated that she contacted the water system months back and that they sent one of their operators out to flush the line. The complainant stated that the operator was unable to turn on the flush valve at the end of their line due to a tree root that was blocking access to the valve, but that the operator asked the resident to turn on all of their faucets in the home and allow them to flush the line out. The complainant stated that she did and it made the problem better, but the odors had returned and now her son was ill with the same infection that her daughter had earlier during the first episode (at the time she did not know what the children had been treated for). The complainant stated she wanted someone to test their water and findout what it was that was making them sick and if it was coming from the water. The LA Department of Health and Human Services informed the complainant that they were unaware of a recent positive coliform sample for their system. They also informed the complainant that their system did have issues with nitrates and that it should not be an issue as their system chlorinates their water. They asked the complainant what odor she smelled, with her response being algae. They asked the complainant how far off of the main line was their home, with her response being 0.25 miles and that their drive was once a parish maintained road but was now a private drive and they owned 50 acres. The asked the complainant if they had livestock troughs on their farm, to which she said no. When asked about swimming pools, she said yes. They inquired further how was their pool filled and was it an above or below ground pool, with her response being; a big above ground pool and that she filled it with a garden hose. They LA DHHS asked if they left the garden hose in the pool and she replied yes. They asked if she ever noticed it siphoning water at which time she replied yes. They asked what kind of chlorination system do you have with the pool and she said they would turn it on when they were using it, but it was not operated all of the time. The LA DHHS informed the complainant that this was most likely was caused the problem and that she should remove the hose immediately and never to do this again. They informed the complainant that this is a problem for water systems and this type of action can contaminate a distribution system and affect not only her family but her neighbors and other member of the water system. They told her that she should always use an air gap when filling her pool. When the LA DHHS contacted the Liddieville Water System about their findings they stated that they would begin another flush. They said their system has a lot of customers with swimming pools and stock tanks as well as farm chemical tanks. After the discovery boil water advisory was issued for the Liddieville Water System and they also started a program to alert customers about the problems with cross connection.

9 NUMBERS DATA 33% 26,065 CCC initial surveys of residential homes 8,601 compliant upon initial CCC Survey

10 TOP UNPROTECTED CROSS- CONNECTIONS DISCOVERED Outside Hose Bibbs 20,387 Interior Hose Connections 11,169 Water Softener Drains 3,096 Boilers 841 Lawn Irrigation 1,636

11 COMPLIANCE HC has provided over 15,700 AFHBVB to homeowners in 2017 for installation on unprotected cross connections.

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14 UPDATE: WATER QUALITY ALERT COMMUNITY ALERT September 14, 2017 FOR IMMEDIATE RELEASE UPDATE: WATER QUALITY ALERT The do-not-drink advisory remains in place. Residents and businesses should not drink, cook, or consume the water at Alameda Point until additional tests confirm it s safe for consumption. However, as confirmed by various tests and the State Water Resources Control Board Division of Drinking Water, the water is safe for bathing and showering. Next Update: Expect an update tomorrow, Friday, by 3 pm on the status of the water quality alert and the most recent results from laboratory tests.

15 Non-Residential Fire Sprinklers Cooling Towers Complex Piping Hose Bibbs Approved Vacuum Breaker? C.I.P. Systems Lawn Irrigation Backflow Prevention? Process Use Water Softener Drains Proper Air Gap at Drain? Chemical mixers Boilers Treated with Chemicals?

16 Residential Survey Letters

17 Do What? Says

18 Residential Survey Fire Sprinklers Letters

19 Residential Fire Sprinkler Systems Requirements NFPA 13D NFPA 13R Michigan Residential Code International Fire Code (if applicable) Local requiremens

20 Multipurpose Piping System Example 1

21 Multipurpose Piping System Example 2

22 Multipurpose Piping System Example 3 Network System

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26 Fire Sprinklers Residential Survey Letters Water Softener Drains Proper Air Gap at Drain?

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30 Fire Sprinklers Residential Survey Letters Wash Tubs Vacuum Breaker? Water Softener Drains Proper Air Gap at Drain?

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33 Fire Sprinklers Residential Survey Hose Bibbs Approved Vacuum Breaker? Letters Wash Tubs Vacuum Breaker? Water Softener Drains Proper Air Gap at Drain?

34 Source of Pollutant or Contaminant Cross Connection Control Potable Water Supply Cross Connection Control Device

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38 What Risk do some Frost Free Hydrants pose? - Bacterial Contamination Ground level Potential source of contamination Manure, septic, pesticide or fertilizer Water level Potential backflow of contaminated water into riser pipe through weep holes

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41 Fire Sprinklers Residential Survey Hose Bibbs Approved Vacuum Breaker? Toilet Tanks Approved Device? Letters Wash Tubs Vacuum Breaker? Water Softener Drains Proper Air Gap at Drain?

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43 Anti-Siphon Ballcock Installation Requirements

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47 Fire Sprinklers Residential Survey Alternative Heating Solar, In-floor heating, Geo Thermal? Hose Bibbs Approved Vacuum Breaker? Toilet Tanks Approved Device? Letters Wash Tubs Vacuum Breaker? Water Softener Drains Proper Air Gap at Drain?

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50 Fire Sprinklers Residential Survey Alternative Heating Solar, In-floor heating, Geo Thermal? Hose Bibbs Approved Vacuum Breaker? Toilet Tanks Approved Device? Letters Wash Tubs Vacuum Breaker? Water Softener Drains Proper Air Gap at Drain? Boilers Treated with Chemicals?

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54 Fire Sprinklers Residential Survey Alternative Heating Solar, In-floor heating, Geo Thermal? Letters Bath Tubs Proper Air Gap? Hose Bibbs Approved Vacuum Breaker? Toilet Tanks Approved Device? Wash Tubs Vacuum Breaker? Water Softener Drains Proper Air Gap at Drain? Boilers Treated with Chemicals?

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58 Fire Sprinklers Residential Survey Alternative Heating Solar, In-floor heating, Geo Thermal? Letters Bath Tubs Proper Air Gap? Hose Bibbs Approved Vacuum Breaker? Toilet Tanks Approved Device? Lawn Irrigation Backflow Prevention? Wash Tubs Vacuum Breaker? Water Softener Drains Proper Air Gap at Drain? Boilers Treated with Chemicals?

59 Lawn Irrigation System Approved PVB Installation

60 I can fix it I watch the DIY Network. WON T HAPPEN HERE LACK OF TRAINING KNOWLEDGE WE LL TAKE OUR CHANCES COSTS TOO MUCH MONEY WE DON T HAVE THE STAFF WE LL GET TO IT DURING SLOW TIMES ELECTED OFFICIALS DON T UNDERSTAND Presented by Paul Patterson- Hydro Designs, Inc.

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70 Fire Sprinklers Residential Survey Water Softener Drains Proper Air Gap at Drain? Letters Bath Tubs Proper Air Gap? Hose Bibbs Approved Vacuum Breaker? Toilet Tanks Approved Device? Lawn Irrigation Backflow Prevention? Wash Tubs Vacuum Breaker? Back-Up Sump Pumps Powered by Water Pressure! Boilers Treated with Chemicals?

71 Sump Pumps? -Emergency back up system -Powered by Municipal Water!

72 -Must have RPZ separation -Must have DNR Written Approval

73 Professionally installed code violation

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76 Fire Sprinklers Residential Survey Well Supply Interconnection? Water Softener Drains Proper Air Gap at Drain? Letters Bath Tubs Proper Air Gap? Hose Bibbs Approved Vacuum Breaker? Toilet Tanks Approved Device? Lawn Irrigation Backflow Prevention? Wash Tubs Vacuum Breaker? Back-Up Sump Pumps Powered by Water Pressure! Boilers Treated with Chemicals?

77 Before After

78 Review Residential Cross Connections do present a hazard to public health Many of the same hazards exist in a home that you would find at a commercial building If you do not have a Residential CCC Program your system may be at risk

79 Questions??

80 Dave Cardinal Vice President Operations Municipal Division Hydro Designs, Inc Crooks Road, Ste. 100 Troy, MI toll free Office: