Brandon Kernen(603)271-0660 / [email protected]
Highly Fluorinated Compound Conference
June 14, 2017
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• UCMR3
• 18 systems - 80 samples
• 3 systems with detections
2013-2015
• Pease Tradeport Water System
• Haven Well - 2,500 ppt PFOSApril 2014
• SGPP facility – Merrimack
• Sink (public water source) – 30 ppt PFOAFebruary 2016
• Former TCI AmherstApril 2016
• Southern NH investigations and statewide assessment
April 2016 to present
AGQS - Ambient Groundwater Quality Standards
(Env-Or 600)◦ PFOA, total of all isomers – 70 ng/L or ppt
◦ PFOS, total of all isomers – 70 ng/L or ppt
◦ Combined total PFOA + PFOS – 70 ng/L or ppt
Soil guidance - direct contact◦ PFOA – 0.5 mg/kg (500 ppb)
◦ PFOS – 0.5 mg/kg (500 ppb)
◦ No leaching based standard
No surface water standard
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****NH is integrating the PFOA+PFOS sampling into all of
applicable regulatory programs****
Identify Potential Sources
+Targeted Well
Sampling
Waste Sites Sampling
700+ sites
Class B Foam
Outreach –Letters &
online forms
New Community Well Siting
Groundwater Discharge
Permits
100+ sites
Public Water Supply
Sampling –Voluntary
400+ sources
Wastewater/ Biosolids
Assessment
Assessment of PFAS
OccurrenceIn NH
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6
869
553
119244
0
100
200
300
400
500
600
700
800
900
1000
<10 10 - <45 45 - <70 ≥70
Nu
mb
er
of
Dete
cti
ons
parts per trillion (ppt)
NHDES Sampling
Results
PFOA + PFOS
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0
50
100
150
200
250
300
350
400
450
FabricCoating (2)
OtherPotentialIndustrial
PFAS Users(7)
Landfills (5) FireDepartments
/ FireTraining (6)
Other UnknownSources
# o
f D
ete
cti
on
s
<10
10 - <45
45 - <70
≥70
(6)
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PFOA +
PFOS
(ppt)
(3)
0
100
200
300
400
500
600# o
f D
ete
cti
on
s
>10 <70 ppt
>70 ppt
PFAS Occurrence
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Analytical
Requirements
• Extended list (9-
23 analytes)
• Low reporting
limits (<5 ppt)
Analytical Issues
• PFOA (linear &
branched)
• Labs reporting
different forms of
same compounds
• Standards from
different vendors are
off by 20%
• PE/PT Testing
Enhanced
Assessment
• Other PFAS
compounds not
typically tested
• Forensic/finger-
printing sources
• Holistic
analytical
approaches
Laboratory Considerations and Challenges
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