fluorochemicals in New Hanover drinking water Nadine Kotlarz, PhD - - PowerPoint PPT Presentation

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fluorochemicals in New Hanover drinking water Nadine Kotlarz, PhD - - PowerPoint PPT Presentation

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Update on GenX and other fluorochemicals in New Hanover drinking water Nadine Kotlarz, PhD nkotlar@ncsu.edu Wilmington, April 17, 2018 Preliminary Information Subject to Revision. Not for Citation or Distribution. 1 Preliminary Information

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SLIDE 1

Update on GenX and other fluorochemicals in New Hanover drinking water

Wilmington, April 17, 2018

1

Nadine Kotlarz, PhD nkotlar@ncsu.edu

Preliminary Information Subject to Revision. Not for Citation or Distribution.

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SLIDE 2

Why collect drinking water samples?

1. Get updated information about GenX 2. Analyze for other fluorochemicals

2

Preliminary Information Subject to Revision. Not for Citation or Distribution.

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SLIDE 3

Fluorochemicals we tested for

(tinyurl.com/GenXstudy)

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Preliminary Information Subject to Revision. Not for Citation or Distribution.

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SLIDE 4

Fluorochemicals we tested for

Fluorochemicals Newly identified “Legacy”

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  • 11. GenX
  • 12. Nafion byproduct 2
  • 13. PFMOAA
  • 14. PFO4DA
  • 15. PFO3OA
  • 16. PFO2HxA
  • 17. 6:2 FTS
  • 1. PFBA
  • 2. PFPeA
  • 3. PFHxA
  • 4. PFHpA
  • 5. PFOA
  • 6. PFNA
  • 7. PFDA
  • 8. PFBS
  • 9. PFHS
  • 10. PFOS

(tinyurl.com/GenXstudy)

Preliminary Information Subject to Revision. Not for Citation or Distribution.

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SLIDE 5

Fluorochemicals we tested for

Fluorochemicals Newly identified “Legacy”

5

  • 11. GenX
  • 12. Nafion byproduct 2
  • 13. PFMOAA
  • 14. PFO4DA
  • 15. PFO3OA
  • 16. PFO2HxA
  • 17. 6:2 FTS
  • 1. PFBA
  • 2. PFPeA
  • 3. PFHxA
  • 4. PFHpA
  • 5. PFOA
  • 6. PFNA
  • 7. PFDA
  • 8. PFBS
  • 9. PFHS
  • 10. PFOS

(tinyurl.com/GenXstudy)

Preliminary Information Subject to Revision. Not for Citation or Distribution.

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SLIDE 6

Two CFPUA water treatment plants serve New Hanover County

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Preliminary Information Subject to Revision. Not for Citation or Distribution.

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SLIDE 7

Two CFPUA water treatment plants serve New Hanover County

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Sweeney water treatment plant (Cape Fear River) Richardson water treatment plant (groundwater)

Preliminary Information Subject to Revision. Not for Citation or Distribution.

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SLIDE 8

Water source for 198 participating households

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194 households on CFPUA’s Cape Fear River water plant

Preliminary Information Subject to Revision. Not for Citation or Distribution.

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SLIDE 9

Water source for 198 participating households

4 households

  • n CFPUA’s

groundwater plant

194

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Preliminary Information Subject to Revision. Not for Citation or Distribution.

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SLIDE 10

Chemours GenX spill 3,700 ng/L GenX in Chemours outfall Nafion byproducts still being released in Chemours outfall Sweeney treated water: 33 ng/L GenX Sweeney treated water: 32 ng/L GenX Sweeney treated water: 98 ng/L GenX GenX health advisory level of 140 ng/L issued

July 14

2,400 ng/L GenX in Chemours outfall 290 ng/L GenX in Chemours outfall

Timeline

10

Preliminary Information Subject to Revision. Not for Citation or Distribution.

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SLIDE 11

Water sampling start Water sampling end Chemours GenX spill 3,700 ng/L GenX in Chemours outfall Nafion byproducts still being released in Chemours outfall Sweeney treated water: 33 ng/L GenX Sweeney treated water: 32 ng/L GenX Sweeney treated water: 98 ng/L GenX GenX health advisory level of 140 ng/L issued 2,400 ng/L GenX in Chemours outfall 290 ng/L GenX in Chemours outfall

July 14 Dec 8

Timeline

11

Preliminary Information Subject to Revision. Not for Citation or Distribution.

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SLIDE 12

Water sampling start Water sampling end Chemours GenX spill 3,700 ng/L GenX in Chemours outfall Nafion byproducts still being released in Chemours outfall

Dec 8

Sweeney treated water: 33 ng/L GenX Sweeney treated water: 32 ng/L GenX Sweeney treated water: 98 ng/L GenX Sweeney treated water: 29 ng/L GenX GenX health advisory level of 140 ng/L issued 2,400 ng/L GenX in Chemours outfall 290 ng/L GenX in Chemours outfall

July 14

Timeline

12

Preliminary Information Subject to Revision. Not for Citation or Distribution.

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SLIDE 13

Treated water from Sweeney Plant

Groundwater source Cape Fear River source

North Carolina health value (140 parts per trillion)

GenX (parts per trillion)

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Most samples with Cape Fear River source had GenX

Preliminary Information Subject to Revision. Not for Citation or Distribution.

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SLIDE 14

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140 parts per trillion = 140 drops in an Olympic size swimming pool

Preliminary Information Subject to Revision. Not for Citation or Distribution.

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SLIDE 15

Treated water from Sweeney Plant

Groundwater source Cape Fear River source

North Carolina health value (140 parts per trillion)

GenX (parts per trillion)

15

Samples with groundwater source did not have GenX

Preliminary Information Subject to Revision. Not for Citation or Distribution.

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SLIDE 16

Groundwater source Cape Fear River source

Similar GenX concentrations in Sweeney treated water

North Carolina health value (140 parts per trillion)

Treated water from Sweeney plant, Oct 2-Dec 5, 2017 GenX (parts per trillion)

One sample shows current exposure

Preliminary Information Subject to Revision. Not for Citation or Distribution.

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SLIDE 17

GenX in Sweeney treated water after Chemours stopped discharging GenX

100 200 300 400 500 600 700 800

6/21 6/26 7/1 7/6 7/11 7/16 7/21 7/26 7/31 8/5

GenX (parts per trillion)

North Carolina Health Value 140 parts per trillion

Date in 2017

Prior to June 2017 Average: 600 parts per trillion Maximum: 4,500 parts per trillion

June 21 June 26 July 1 July 6 July 11 July 16 July 21 July 26 July 31 Aug 5

Data source: CFPUA and NC DEQ

Preliminary Information Subject to Revision. Not for Citation or Distribution.

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SLIDE 18

Individualized water results

“Non-detect” Concentration (parts per trillion)

18

water samples

Preliminary Information Subject to Revision. Not for Citation or Distribution.

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SLIDE 19

Individualized water results

Health value Participant’s sample Average concentration (45 parts per trillion)

*

water samples

Concentration (parts per trillion) “Non-detect”

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Preliminary Information Subject to Revision. Not for Citation or Distribution.

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SLIDE 20

Fluorochemicals with health values

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Concentration (parts per trillion)

Preliminary Information Subject to Revision. Not for Citation or Distribution.

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SLIDE 21

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Other “legacy” fluorochemicals

Concentration (parts per trillion)

Preliminary Information Subject to Revision. Not for Citation or Distribution.

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SLIDE 22

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A pure sample of each chemical is needed to get concentration

Mass spectrometer

Preliminary Information Subject to Revision. Not for Citation or Distribution.

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SLIDE 23

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Average mass spectrometer response

A pure sample of each chemical is needed to get concentration

Preliminary Information Subject to Revision. Not for Citation or Distribution.

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SLIDE 24

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Response Parts per trillion in water Pure chemical

  • r “standard”

Average mass spectrometer response

A pure sample of each chemical is needed to get concentration

Preliminary Information Subject to Revision. Not for Citation or Distribution.

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SLIDE 25

Other fluorochemicals were present

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No pure chemicals were available

Average mass spectrometer response

Preliminary Information Subject to Revision. Not for Citation or Distribution.

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SLIDE 26

Newly identified fluorochemicals

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Preliminary Information Subject to Revision. Not for Citation or Distribution.

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SLIDE 27

Conclusions

  • 1. GenX found in most water samples with Cape Fear River

source

  • 2. No samples were above current public health values for

GenX, PFOA or PFOS

  • 3. Other newly identified fluorochemicals were present in

water samples

27

Preliminary Information Subject to Revision. Not for Citation or Distribution.

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SLIDE 28

Blood and urine analyses are

  • ngoing
  • 1. Water analysis helped to characterize exposure
  • 2. Water shows current exposure levels but blood levels may

provide more information about long-term exposures

  • 3. Fluorochemicals that were low in water may be higher in

blood

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Preliminary Information Subject to Revision. Not for Citation or Distribution.

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SLIDE 29

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Acknowledgments

Study participants National Institute of Environmental Health Sciences (NIEHS, 1R21ES029353) Mark Strynar, US EPA Andrew Lindstrom, US EPA James McCord, US EPA Zachary Hopkins, NCSU Madi Polera, Samantha Davis, Nick Iraola, Leah Becton, Shannon Schaible, Spencer Bloom, Samuel Elter, Yamile Eucinda (UNCW), Janhavi Kulkarni, Lan Cheng (NCSU) New Hanover County Health Department Community Science Advisory Panel

Preliminary Information Subject to Revision. Not for Citation or Distribution.