DEQ-CFW_00010525

From: 8arber, Jim U|K8.BARB[R0
Sent: 8/27/20104:35:1I PM
To: Stanley, Larry [/o=NClVlAlL/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Recipients/cn=larry.stanley]
CC: Ri#aard,Jon [/b=NCK8A|L/ou=ExchangeAdministrative Group (FYD|BOHFI]3PD[T)/cn=Recipient$cn=jon.hsXaard]
Subject: FVV: DuPont Fayetteville Works — River Water Sediment — PFOA Results
Attachments: Z010Sediment Basin PFOAResu|tspdf
Larry;
Here's the sample results relating to the proA in the sediment.
zim Barber
---original message -----
From: Michael s 3ohnson [mailto:[e-mail]]
Sent: Thursday' 3uly 29' 2010 I2:05 PM
To: Barber, 3im; Hardee, Ed
subject: DuPont Fayetteville works — River water sediment — ppoA Results
Per your request, here are the ppox results of the seven samples taken from our river water sediment
basin.
The lab ran the synthetic Precipitation Leaching procedure {spLP; EPA
SW-846 Method I]lZ) in which one part by weight of the sediment is mixed with twenty parts by weight of
an extraction liquid' agitated for 18 hours, and then filtered' with the filtrate being analyzed for the
pFoA.
You will see that the seven samples ranged from <0.014 ug/L PpuA (i.e. less than quantification level) to
0.0I7 ug/L PpuA. so all seven samples were around the analytical method's quantification level.
pvz: Per the lab's documentation, the analytical quantification level is determined by multiplying the
method detection level (moL) by five.
To convert the sPLP results to total prox in the sediment' one can multiple the sPLp result by ZO to
change from ug/L in the leachate to ug/kg of dry sediment.
Therefore the dry sediment would have been in the range of <0.28 ug/kg ppuA to 0.34 ug/kg ppox.
Let me know if you need any other information. z will be on vacation tomorrow (07/30) and the week of
08/02' so z will not be able to respond to your messages until the week of 08/09.
mike
Michael E. zuhnson
Environmental manager
DuPont company
Fayetteville works
(910) 678-I155
(see attached file: 2010 sediment Basin PFOA Results.pdf)
This communication is for use by the intended recipient and contains information that may be privileged,
confidential or copyrighted under applicable law. If you are not the intended recipient, you are hereby
formally notified that any use, copying or distribution of this e-mail, in *hole or in part, is strictly
prohibited. please notify the sender by return e-mail and delete this e-mail from your system. unless
explicitly and conspicuously designated as ^c-Contract Intended", this e-mail does not constitute a
contract offer' a contract amendment' or an acceptance of a contract offer. This e-mail dues not
constitute a consent to the use of sender's contact information for direct marketing purposes or for
transfers of data to third parties.
Francais Deutsch Italiano Espanol Portugues 3apanese Chinese Korean
OEQ-CFVV_00010525