GenX Information

Posted on: July 27, 2017

CFPUA Chairman's Afternoon Update: July 27, 2017

Mike Brown, CFPUA Board chairman, will provide two daily updates—one morning and one afternoon—with information on activity surrounding GenX. Updates will be provided each weekday. Below please find Chairman Mike Brown’s afternoon update on updated water sample results from NC DEQ and new testing equipment at the Sweeney Water Plant. 


1. NC DEQ today released new data for GenX concentrations in water samples collected on July 12 and 13 in the Cape Fear River. According to their news release, “those test results show that concentrations of the unregulated chemical GenX in all treated water samples collected by the state during week four of sampling remained below the 140 parts per trillion health goal.”

“It’s good news that recent test results are showing levels of GenX in treated water trending downward to below our health goal,” said Mandy Cohen, secretary of the N.C. Department of Health and Human Services. “We will continue to monitor these results to look for any new, emerging trends, and will alert the public in timely fashion as we have new results to share.”

Michael Regan, secretary of the Department of Environmental Quality, added that his agency and staff at DHHS continue to investigate.

“The first four weeks of data gathered as part of our investigation are encouraging, and we’re continuing our investigation to protect the health and safety of those who depend on the Cape Fear River for drinking water and other uses,” Regan said.

To read the full news release, click here.


2. Late yesterday afternoon, CFPUA received updated water sampling data from Eurofins for our Sweeney Water Plant. The most recent data shows levels of GenX below the NC DHHS health advisory goal of 140 ppt. See below for specific sampling data:


Sweeney WTP GenX Data (ng/L) -MRL 2 ng/L


Date

Raw

Finished


6/26/17

149

156


6/28/17

87.5

120


6/30/17

68.6

89.5


7/3/17

55.6

55.4


7/5/17

93.9

87.4


7/7/17

136

132


7/10/17

102

145


7/12/17

93.0

122


7/14/17

114

113


7/15/17

194

127


7/16/17

336

250


7/17/17

166

286


7/18/17

128

185


7/19/17

112

137


7/20/17

84.9

115






























CFPUA remains committed to providing the highest quality drinking water for our customers. We will continue to prioritize communication and transparency as we seek additional information.

To view the full test results, click here.


3. For CFPUA customers who prefer water from an alternate source, CFPUA is offering free water from a ground source. This water is treated at CFPUA’s nanofiltration plant. On July 13, CFPUA sampled water at this Richardson Nanofiltration Plant—which serves the free water station at Ogden Park—for GenX and it was not detected. This water is supplied by aquifers that have not been affected by Chemours’ discharge of GenX.

Residential CFPUA customers may fill their clean personal containers at New Hanover County’s Ogden Park near the tennis courts at 615 Ogden Park Drive. This is available daily from 8:00 a.m. to 8:00 p.m. CFPUA will continue to offer this service until we confirm a trend line that is at or below the health advisory goal set by NC DHHS.


4. Testing equipment arrived yesterday for the pilot testing of GAC (granular activated carbon) at the Sweeney Water Plant. This testing station is being constructed on site, and the tests are designed to give CFPUA an idea of how effective this treatment option is in the removal of GenX and other per-fluorinated compounds.

GAC adsorption is a water treatment process that uses a granular media produced from carbon-based materials such as coal, coconut shells, peat, or wood that have been “activated” by heat and sometimes other manufacturing steps to yield the desired properties. There are many types of GAC media, and selection of an effective carbon for a given situation is frequently based on site-specific testing.

GAC is implemented in water treatment in one of two roles: as a filter-absorber, providing both filtration and adsorption functions or, as a post-filter contactor in which adsorption is the primary treatment objective. As the adsorptive capacity of the GAC becomes exhausted, microbial growth on the GAC can be used to convert some of the chemicals in the water to cell mass. This is referred to as biofiltration. The GAC filters at the Sweeney plant operate as biofilters.

We will continue to provide updates as we learn more about the viability of this testing option.


5. CFPUA encourages the public to check our website and social media channels for updates as this continues to unfold. We are committed to transparency, and we look forward to continuing our partnership with you through the duration of this process.

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