DEQ-CFW_00003264

DuPont Company — Fayetteville Works NPDES Permit No. NC0003573
Supplemental Information
Supplemental Information — Permit Renewal Application — April 29, 2011
Current Operating Conditions
Butacite® Manufacturing: The DuPont Company — Fayetteville Works' Butacite®
manufacturing area produces two final products. DuPont— Butacite® Interlayer plastic sheeting
is the final product used in safety glass such as automobile windshields. Polyvinyl butyral
(PVB) resin is shipped off -site as a transfer to other DuPont locations for final processing.
Wastewater generated from this manufacturing facility is treated in the site's biological
wastewater treatment plant ("W WTP").
Nafion® Manufacturing: The DuPont Company — Fayetteville Works' Nafion®
manufacturing area produces five final products. DuPontr' Nafion® Membrane is a plastic film
used in the chloroalkali industry and in electrochemical fuel cells. Nafion® Resins are
ultimately extruded into a finished film. The FLPR Vinyl Ether and IIFPO monomers are
shipped to other DuPont locations to produce various fluorochemical products such as DuPonfrm
Teflon®. Wastewater generated from this manufacturing facility is neutralized and discharged to
the WWTP.
PPA Manufacturing: The DuPont Company — Fayetteville Works' PPA manufacturing
area produces several polymer processing aids. The processing aids produced in this unit are
used to produce fluoropolymers and fluorinated telomers, but none of the produced processing
aids are used at the Fayetteville Works site. This facility was started up in November 2002. All
process wastewater generated from this manufacturing facility is collected and shipped off -site
for disposal. No process wastewater from this manufacturing facility iddischarged to the site's
biological WWTP or to the Cape Fear River.
SentrvGlasO Manufacturin : The DuPont Company — Fayetteville Works' SentryGlas®
manufacturing area produces DuPont"' SentryGlas® ionoplast interlayer laminate. SentryGlas®
interlayer is used for laminated safety glass in side, rear, and, overhead automobile windows. It
is also used in architectural applications desiring safety glass. This facility was started up in
June 2005. There is no contact process wastewater generated from this manufacturing facility,
therefore only sanitary waste fiom this area is treated in the WWTP . This manufacturing facility
does discharge non -contact cooling water to a surface ditch and ultimately to Outfall 002.
PVF Manufacturin : The DuPont Company — Fayetteville Works' PVF manufacturing
area produces polyvinyl fluoride resin is used in the electronics industry as a backing for
Photovoltaic cells, as well as many other uses. The PVF-1 facility was constructed in 2006-2007
and was started up in September 2007. The PVF-2 facility was constructed in 2008-2010 and
was started up in June 2010. Process wastewater generated from this manufacturing facility is
treated in the WWTP.
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