HomeMy WebLinkAboutDEQ-CFW_00000405Brower, Connie
From: Grzyb, Julie
Sent: Thursday, June 15, 2017 9:34 AM
To: Brower, Connie
Subject: FW: questions
FYI —
Michael's responses to my questions on HFPO dimer acid verses HFPO dimer acid fluoride and others below
Julie
From: JOHNSON, MICHAEL E [mailto:MICHAEL.E.JOHNSON@chemours.com]
Sent: Thursday, June 15, 2017 7:07 AM
To: Grzyb, Julie <julie.grzyb@ncdenr.gov>
Subject: RE: questions
Hi Julie.
See my answers below in bold.
Mike
Michael F. Johnson, PE
Environmental Manager
Chemours Company — Fayetteville Works
(910) 678-1155
Chemours-
The Chemours Company FC, LLC
22828 NC Highway 87 W
Fayetteville, NC 28306-7332
From: Grzyb, Julie [mailto:iulie.grzvb@ncdenr.gov]
Sent: Wednesday, June 14, 2017 5:26 PM
To: JOHNSON, MICHAEL E<MICHAEL.E.JOHNSON@chemours.com>
Subject: questions
Michael,
Are statements A and C correct ? And can you answer B and D?
A. The GenX manufacturing area for FRD 902 "GenX" and FRD 905 "GenX" referred to as PPA is closed loop and
does not have a discharge. All process wastewaters generated in this area are shipped to AR or OH for
incineration. Yes
I
DEQ-CFW 00000405
B. What you thought was primarily measured in the Cape Fear was HFPO dimer acid — which is what is used to
make FRD 903 "GenX".
Is this process closed loop as well? No. HFPO dimer acid fluoride is produced in the Vinyl Ethers
Process as an intermediate for the perfluoropropyl vinyl ether ("PPVE") finished product
(produced in the Vinyl Ethers Process) and also is sent to the PPA Manufacturing area as the raw
material for GenX (produced in the PPA Process). The Vinyl Ethers Process does have
wastewater discharges, so it would not be "closed loop". In the Vinyl Ethers Process, unreacted
HFPO dimer acid fluoride comes in contact with water and is converted to HFPO dimer acid, and
that is what was detected in the river.
Connie - I didn't ask my question properly — I really wanted to know if the process of making
FRD 903 was closed loop like 902 and 905.
C. In addition, you stated that the HFPO dimer acid fluoride is possibly discharged in the wastewaters from two
manufacturing areas -
1. the VINYL ETHERS PROCESS because it is a byproduct`
2. and the manufacturing of PPVE because it's feedstock 1
The Vinyl Ethers Process produces PPVE as a finished product. Unreacted HFPO dimer acid
fluoride (a byproduct of the process) during the PPVE campaign comes in contact with water and
is converted to HFPO dimer acid.
D. The samples being collected will be tested for HFPO dimer acid (can I assume this is the same as HFPO dimer
acid fluoride)? Is the fluoride left out because it's redundant?
The HFPO dimer acid fluoride immediately reacts with water and is converted to HFPO dimer
acid. The scrubber system uses an aqueous solution of potassium hydroxide (KOH), so the
chemistry is the HFPO dimer acid fluoride reacts with water to become HFPO dimer acid and
HF, then the HF is immediately reacted with the KOH to form potassium fluoride (KIP).
Trying to clarify the process in my mind.
Thanks,
Julie A Grzyb
Supervisor
NPDES Complex Permitting
NC DEQ / Division of Water Resources / Water Quality Permitting
New 919 807 6390 office
919 707 9000 main office
aulie.grzyb(a ncdenr.yov
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