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CFE minutes 091117
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CFE minutes 091117
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Date
9/11/2017
Meeting Type
Regular Meeting
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Advisory Bd. Minutes
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CFE agenda 091117
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The Partnership for Safe Water is a voluntary EPA program to go above and beyond and OWASA was the <br />first in the state to achieve the highest level and 9th in the nation. So this preparation, their <br />interconnections, and their commitment to excellence encouraged them to take plant offline. <br /> <br /> No water with elevated fluoride left the treatment plant. 1.5 million gallons of over-fluoridated water <br />needed to be diluted and pumped in a controlled manner from the water treatment plant into the <br />wastewater system. The fluoride system has been off since February and is expected to be turned back <br />on this month (Sept 2017). <br /> <br /> The water connection from Durham would have kept the plant operating at a moderate level, but then <br />there was a water main break in the Foxcroft drive area of Chapel Hill. Only 2-3 breaks of this magnitude <br />in the past 40 years, and they’d never had a fluoride overfeed. The source of the water main break was <br />an incorrectly–installed water main pipe that was installed 42 years ago before OWASA was created. Over <br />½ of all OWASA’s pipes are less than 20 years old. <br /> <br /> With the water supply having dropped so low, OWASA requested Orange County activate the Emergency <br />Operations Center (EOC) to help manage the response. The EOC could focus on meeting all resident <br />needs so that OWASA could focus on getting the plant back online. OWASA had recently undergone a <br />water emergency simulation to practice this very type of scenario, and they were able to put that training <br />into practice. <br /> <br /> Drinking water is used for firefighting and sanitation as well as for drinking water, so it is often unsafe to <br />turn off water supply. Instead, OWASA customers were asked not to use the water. The OC Health <br />Director also issued a “Do Not Use, Do Not Drink” to help with water conservation and out of an <br />abundance of caution to help maintain pressure so that there would not be inflow of contaminated <br />groundwater. 20psi is the state minimum. Water tests revealed that there was not contamination just <br />under 24 hours later and the “Do Not Use, Do Not Drink” order was lifted. <br /> <br /> Post-Emergency Actions: <br />OWASA hired two independent consultants to figure out why the fluoride was overfed and why the break <br />happened. They were posted on their website before OWASA could read them in an effort to reinforce <br />their objectivity and transparency. <br /> <br /> They have also instituted internal After-Action Reviews (AARs) to look into what happened in this <br />emergency and also elsewhere. <br /> <br /> OWASA is currently doing a detailed risk assessment in both plants based on ISO 31000 standards. The <br />results should be in next June. <br /> <br /> Results of the after action review for this event show that OWASA customers saved 37% of their normal <br />usage while the “Do Not Use, Do Not Drink” order was in place. This was not all the essential use from <br />hospitals. While this is a significant portion of the total demand, there is still a long way to go to ensure <br />that non-essential water usage is curtailed when necessary. A parallel project to move to Advanced <br />Metering Infrastructure (AMI) will help to pinpoint who is using water during those emergencies. <br /> <br /> A Note on Climate Change: <br /> Based on the available data, OWASA is expecting that future rainfall should be around the same, but <br />climate change will make it more likely to happen in bigger bursts. This is much harder to manage <br />productively. <br /> <br /> <br />Lands Legacy Program – Kim Livingston <br />This 17 year old program was borne out of a County Commissioners initiative 1998 (along with the CFE) to <br />protect important lands: parkland, nature preserves, historic/cultural lands, etc. This program leverages a strong
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