DEQ-CFW_00059885

Barber, Jim
From: Barber, Jim
Sent: Thursday, August 12, 2010 4:43 PM
To: Hardee, Ed
Cc: Barnhardt, Art
Subject: RE: DuPont Fayetteville Works -- River Water Sediment -- PFOA Results
Ed;
Is the information I'm sending to Mike Johnson the correct format and consistent with what we
discussed with him during our meeting at the site last year.
Please provide any corrections or additional information that you think I need to provide to Mike
so DuPont can prepare and submit the application to manage the sediment from the basin.
Thanks
Jim Barber
��� �I ra1�
Mike;
Thanks for the follow up information concerning the river sediment to be removed from the basin at
DuPont. Based on the information provided (TCLP data and SPLP data) the sediment in the basin would
appear to meet the Class A residual standards. Below is a link to the DWQ website for the
appropriate application template to use in preparing DuPont's application. Use form DRS 08-07
(Distribution of Residual Solids) for a Class A material.
http://portal.ncdenr.org/web/wq/aps/lau/applications
Once you prepare the application consistent with the instructions provided with the application
template and provide the necessary documentation with respect to samples taken; provide a detailed
site map with storage area (and approx. area needed - i.e. acres of mined area for storage) and
supplement with correspondence received from Land Quality concerning storing the sediment in the
on -site mine area(s) under their jurisdiction.
As we discussed a couple of weeks ago, provide estimates for the length of time the sediment will
be stored in the mine area(s). The Division wants to see progress on the use of this material
verses indefinitely being stored in the mine area. I'm sure some additional discussion will take
place, during the review process, based on the timeframes proposed. Also a description of the fill
activities that the sediment is proposed to be used in (i.e. plant road maintenance, building
pad/structural fill, retaining wall backfill, etc.). Provide groundwater information (MW maps with
groundwater depth relative to land surface or seasonal high groundwater contour maps with land
surface contours) for the plant site will be helpf I in understanding the relationship between
groundwater and fill activities at the plant site. The Land Application Unit (LAU) wishes to see at
least three feet between fill activities and seasonal high groundwater at the site. Hopefully
historic groundwater monitoring data exists that will provide a understanding of highest measured
groundwater depths at the plant site (with respect to past weather patterns and not recent drought
conditions) to draw a reasonable conclusion that fill placed at the site will have a buffer to
groundwater.
As you prepare the application; if you have any questions, don't hesitate to call me or Ed Hardee
for assistance.
Jim Barber
-----Original Message -----
From: Michael E Johnson [mailto:[e-mail]]
Sent: Thursday, July 29, 2010 12:03 PM
To: Barber, Jim; Hardee, Ed
Subject: DuPont Fayetteville Works -- River Water Sediment -- PFOA Results
1
DEQ-CFW 00059885

Per your request, here are the PFOA 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 1312) 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 PFOA (i.e. less than quantification
level) to 0.017 ug/L PFOA. So all seven samples were around the analytical method's quantification
level.
FYI: Per the lab's documentation, the analytical quantification level is determined by multiplying
the method detection level (MDL) by five.
To convert the SPLP results to total PFOA in the sediment, one can multiple the SPLP result by 20
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 PFOA to 0.34 ug/kg PFOA.
Let me know if you need any other information. I will be on vacation tomorrow (07/30) and the week
of 08/02, so I will not be able to respond to your messages until the week of 08/09.
Mike
Michael E. Johnson
Environmental Manager
DuPont Company
Fayetteville Works
[phone]
(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 whole 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 "E-Contract
Intended", this e-mail does not constitute a contract offer, a contract amendment, or an acceptance
of a contract offer. This e-mail does 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 Japanese Chinese Korean
http://www.DuPont.com/corp/email_disclaimer.html
2
DEQ-CFW 00059886