DuPont Haskell Global Centers
for Health and Environmental Sciences
1090 Elkton Road, P.O. Box 50
Newark, DE 19714-0050

meif

June 25, 2009

Via Federal Express

Document Processing Center (Mail Code 7407M)
Room 6428
Attention: 8(e) Coordinator
Office of Pollution Prevention and Toxics
U.S. Environmental Protection Agency
1201 Constitution Ave., NW
Washington, DC 20004

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8EHQ-0609-17558
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Dear 8(e) Coordinator:

Re:

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Perfluorohexanoate Anion (PFHxA) - CAS # 307-24-4
Occupational Serum Sample Results
Chambers Works Facility, Deepwater, New Jersey

This letter is to inform you of the results of serum sampling for PFHxA from the above
referenced DuPont site for 2009. This information is provided to the TSCA 8(e) office in view of
the Agency's continued interest in perfluorinated substances and as precautionary measure.
Sincerely,

{l
A. Michael Kaplan, Ph.D.
Director - Regulatory Affairs
AMK/JLC: clp
(302) 366-5260
Attachment (1 page)
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8

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0

0

0

2

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DCN:88090000282

Contains No C-It
CONTAINS NO eBl

5

8

 DuPont Company
Chambers Works, Deepwater, NJ
Serum Perfluorohexanoate Anion (PFHxA) Results

t
Results for
Samples Collected
ID Number

Exposure Group

March 2009

80070

P

0.5

80172

P

ND*

80301

P

1

80397

P

0.6

80148

P

0.7

80138

P

80161

P

0.5
<0.5....

80349

P

: : - ' ,,,,%%I:t'"

0.7
,A.

Number of Samples

8

Average (ppb)

0.54

Median (ppb)

0.55

Max (ppb)

1

Min (ppb)

ND"
0.28

Std Dev (ppb)
P = Production Group
Results are expressed in parts per billion (ppb).

* ND=Not Detected; a value of 0.1 ppb was used for
statistical analysis, 0.1 ppb is equal to 1/2 of the LOD
** <0.5 is detected but less than the limit of quantitation;
a value of 0.25 ppb was used for statistical analysis
0.25 ppb is equal to 1/2 of LOQ

Samples Analyzed by Axys Laboratory
Sydney, British Columbia, Canada
Limit of Detection = 0.2 ppb
Limit of Quantification = 0.5 ppb

June 9,2009

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