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[Fwd: Dupont]
Subject: [Fwd: Dupont]
From: Belinda Henson <[e-mail]>
Date: Thu, 18 May 2006 08:20:56 -0400
To: Paul Rawls <[e-mail]>
Paul,
We wanted to give you an update on where Dupont was on relocation of the discharge
pipe. Thanks.
Belinda S. Henson
Regional Supervisor
NC DENR-Division of Water Quality
Surface Water Protection Section
Fayetteville Regional Office
[phone]
Subject: Dupont
From: Mark Brantley <[e-mail]>
Date: Wed, 17 May 2006 15:07:38 -0400
To: Belinda Henson <[e-mail]>
Belinda
I talked with Mike Jonhson just a few minutes ago about thier outfall line being
relocated. He told me they are in the process of drawing up a contact with Ch2m
(or is it C2hm?) about doing the environmental modeling. They are having some
problems doing it but he feels they should have a contract in about 2 weeks. Then
the modeling work can begin. He told then he will try and provide us with a
timeline for their project.
Chad was the lock and dam yesterday and he said the efflent was very turbid from
the erosin. Will the outfall issue need to be in the
renewal? staff report for the permit
Mark
Mark Brantley
Environmental Chemist
NC DENR-Division of Water Quality
Surface Water Protection Section
Fayetteville Regional Office
[phone]
Dupont
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Content -Type: message/rfc822
Content -Encoding: 7bit
5/18/2006 8:47 AM

4171 PONT
Mr. Gil Vinzani
NCDENR Division of Water Quality
NPDES Unit
Archdale Building — 91h Floor
512 N. Salisbury Street
Raleigh, North Carolina 27604
SUBJECT: NPDES Permit Rer
NPDES Permit No.
Dear Mr. Vinzani:
DuPont Fluoroproducts
22828 NC Highway 87 W
Fayetteville, NC 28306-7332
May 1. 200.6:.
2006
i
Apllicati
003573
Pursuant to requirements of the referenced NPDES permit, the DuPont Company —
Fayetteville Works is submitting the NPDES Form 1 and Form 2C (original and two copies) for
permit renewal by the Division of Water Quality.
Included in the permit application is a Supplemental Information document which describes
the Current Operations and Proposed Changes. This site is implementing a project to construct
and operate a new manufacturing unit. This unit will produce Polyvinyl Fluoride (PVF) polymer
resins. The PVF resins which will be manufactured at the Fayetteville Works plant are used in
the DuPontTM Tedlar® fluoropolymer film business. Tedlar® film is manufactured at another
DuPont site (not the Fayetteville Works site).
The application is being submitted without some of the testing results as these results were
not available at the time of submittal. These absent results are indicated by an asterisk (*) on
Pages V-2 throughV-9 of Form 2C. This data will be submitted as an addendum when the
analytical reports are received and inputted into a Form 2C.
Should you have any questions or need additional information, please feel fr
ee to call me at
[phone].
Enclosures
E.I. du Pont de Nemours and Company
Michael E. Johnson
Environmental Manager

DuPont Company — Fayetteville Works
NPDES Permit No. NC0003573
Supplemental Information
Supplemental Information — Permit Renewal Application — May 1, 2006
Current Site Water Management
Process wastewater and stormwater from the various manufacturing areas are collected in the
respective area sumps and ultimately conveyed via a gravity flow underground process sewer -
pipe to the site's central wastewater treatment plant (WWTP). Sanitary sewage is conveyed via a
separate underground sewer system to the WWTP. The permitted flowrate of the WWTP is
2.0 MGD, with an actual average flowrate of approximately one MGD.
This process wastewater is commingled in the WWTP Influent Sump where it is pumped to
an 850,000 -gallon Equalization Basin. The Equalization Basin is mixed with two floating
submerged mixers. Three floating surface aerators in the basin cool and aerate the incoming
wastewater.
A 175,000 -gallon Emergency Retention Tank is available for temporary storage of
wastewater which may need additional treatment or acclimation in the WWTP activated sludge
process at a controlled rate that allows for proper biological treatment.
Wastewater from the Equalization Basin is normally pumped to a 250,000 -gallon Predigester
Tank in which initial biological activity with the WWTP activated sludge begins. The
Predigester Tank is aerated. The partially treated wastewater from the Predigester Tank is
pumped to a 1,700,000 -gallon Aeration Tank.
The Aeration Tank is the site of the majority of the biological activity. The Aeration Tank is
aerated primarily by a diffused air system located in the bottom of the tank. The tank can have
supplemental aeration via a floating Biomixer@ that injects air through submerged rotors.
The biologically treated wastewater is then sent to two in -ground clarifiers (119,000 gallons
and 1685000 gallons respectively) in parallel. The clarified treated effluent is discharged to and
through Outfall 001.
The wasted sludge is sent to a Dissolved Air Floatation (DAF) unit, then to a 47,000 gallon
Sludge Storage Tank, and finally to a Rotary Filter for thickening. The thickened sludge is
dewatered in a Sludge Press, and can be dried in a steam -heated dryer for additional moisture
removal. The dewatered and/or dried sludge is transported off-site to a commercial Subtitle D
landfill.
Non -contact process cooling water and non -process stormwater are conveyed via surface
ditches to the site's Woodlined Ditch. In addition, excess riverwater flow and Outfall 001
effluent are discharged directly to the Woodlined Ditch. The combined, total flow of water from
the site is discharged and monitored at Outfall 002. The Outfall 002 maximum 30 -day average
flow was 16.3 MGD during the period from 2005 to 2006. Flow variability at Outfall 002 is
from 3.0 to 18.6 MGD, however, flow can consistently be in the 16.3 MGD range.

DuPont Company – Fayetteville Works
NPDES Permit No. NC0003573
Supplemental Information
Proposed Changes in Operations
PVF Manufacturing Facility: The DuPont Company – Fayetteville Works has been selected as
the location for the DuPontTM Polyvinyl Fluoride (PVF) manufacturing process. The
manufacturing facility is in the process of being designed, and will produce PVF polymer resins.
PVF resin to be manufactured at the Fayetteville plant is used in DuPontTM Tedlar®
fluoropolymer film business. Tedlar® film is manufactured at other DuPont site location (not
the Fayetteville plant). Tedlar® is used in the photovoltaic industry in photovoltaic cells and the
aircraft industry for interior cabin surfaces, as well as many other uses. This new facility
construction will be completed in August 2007 and begin start up in October 2007.
The manufacturing facility will be located near the existing Teflon® FEP resin manufacturing
area. This process will produce polyvinyl fluoride (PVF) resin (CAS No. 24981-14-4).
As with most fluorochemical processes, the wastewater from the PVF manufacturing process is
expected to have very little or no biological oxygen demand (BODS) value. Treatability tests
have been performed on samples from another DuPont site which curren ly manufactures PVF.,
These studies have indicated use of non- io ogica treatment will meet effluent limitation of
OCPSF NSPS guidelines of Subpart D—Thermoplastic Resins (40 CFR 414.40). DuPont
proposes to discharge the treated wastewaters from this new facility through a currently
permitted outfall, designated as Outfall 006. The contact process wastewater and stormwater
will be treated with solids separation technology prior to discharging to the outfall.
A suggested change to the language of the current permit's narrative for Outfall 006 that would
accommodate the new PVF Manufacturing Facility follows:
"Beginning on the effective date of this permit and lasting through the expiration date, the
Permittee is authorized to discharge from Outfa11006 (Polyvinyl fluoride Manufacturing
Facility low -biodegradable process wastewaters). Such discharges shall be limited and
monitored by the Permittee as specified below:"
The process wastewater is expected to contain unreacted vinyl fluoride (CAS No. 00075-02-5).
The anticipated quantity of vinyl fluoride from the PVF Manufacturing Facility is 0.312 pounds
er day. This quantity would equate to 0.9 mg/L vinyl fluoride at Outfall 006 and 0.0035 mg/L
vinyl fluoride at Outfall 002. –
Finally, non -contact cooling, condensate, and stormwater fr
om the PVF Manufacturing Facility
will be discharged directly to Outfall 002 via the site's Woodlined Ditch.

DuPont Company — Fayetteville Works
Current Operating Conditions
NPDES Permit No. NC0003573
Supplemental Information
Butacite® Manufacturing: The DuPont Company — Fayetteville Works' Butacite®
manufacturing area produces two final products. DuPontTM 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 tre � nt WWTP).
Nafion® Manufacturing: The DuPont Company — Fayetteville Works' Nafion®
manufacturing area produces five final products. DuPontTM 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 HFPO monomers are
shipped to other DuPont locations to produce various flu-oroc e `cal products such as DuPontTM
Teflon®. Wastewater generated from this manufacturing facility is neutralized and dischar eg d to
the WWTP.
Teflon® Manufacturing: The DuPont Company —Fayetteville Works' PMDF Teflon®
manufacturing area produces DuPontTM Teflon® FEP resin. Teflon® FEP resin is used in the
electronics industry as a coating for wire, --as well as many other uses. This facility was
constructed in 1999-2000 and was started up in December 2000. Wastewater generated from
this manufacturing facility is treated in the WWTP.
APFO Manufacturing: The DuPont Company —Fayetteville Works' APFO manufacturing
area produces, mmomum perfluorooctanoate. The APFO produced in this unit is used to
produce fluoropolymers and fluorinated telomers, but none of the produced APFO is used at the
C Fayetteville Works site. This facility was started up in November 2002. All wastewater
generated from this manufacturing facility._ is and shipped off site for disposal.
No process wastewater from this manufacturing facility is discharged- to-the-site'8-biological
WWTP or to the Cape Fear River.
SentryGlas® Plus Manufacturing_: The DuPont Company —Fayetteville Works' SentryGlas®
Plus manufacturing area produces DuPontTM SentryGlas® Plus Tonoplast interlayer laminate.
SentryGlas® Plus 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 200.5_; There is no contact process wastewater generated from this
manufacturing facility, therefore only sanitary waste from this area is treated in the WWTP.
This manufacturing facility does discharge non -contact cooling water to the woodlined ditch and
ultimately to Outfall 002. _ --- --

DuPont Company — Fayetteville Works
Form 2C Permit Application
Data Unavailable
NPDES Permit No. NC0003573
Supplemental Information
Priority Pollutants, special conventional and non -conventional analysis required testing results
ww not available at the time of Permit Application submittal. This data will be submitted when
o/lab not
are received and input into the Form 2C as an appendum. These absent analytical
results are indicated with an asterisk (*) on the Form 2C, Pages V4 through V-9.
Data Abnormalities
When compiling the Outfall analytical database to perform the statistical analysis required in
Form 2C, there were several apparent data abnormalities reported in the DMRs. These
abnormalities, whether analytical or sampling event derived, are worth noting and or correcting
in the Form 2C as they are misleading of representing the discharge from the site.
Data Noted: On 11!08/OS a COD value of 102 mg/L was reported for Outfa11002 at a high flow
rate of 13.3 MGD resulting in a calculated mass of 11,292 lb/day. Upon review of Outfall 001
data and site's operating conditions, this value appears in error and the corresponding mass
discharge is believed to be incorrect. As with all analytical results when retains are not available
for retest, one must apply logic based on available information. This value was still reported in
the 2C data, but noted here as to the possible error.
Data Revised: Total Phosphorus is monitored at Outfa11002 once a month. On site there is only
one potential source of phosphorus. The Butacite® operation uses phosphoric acid in the batch
operation. During the months of December and March 2005, the maximum number of batches in
a given day was twenty (20) batches. The quantity of phosphoric acid "as Phosphorus" in each
batch is 4.7 lb/batch or a maximum of 94.5 lb/day "Total Phosphorus" potentially being
discharged. This value is in line with what is normally reported 15 to 50 lbs per day which will
vary as biological uptake will occur as well as equalization within the biological treatment
system. Any value grossly in excess of 95 lb/day Phosphorus is highly probable in error, either
analytical or sampling, and not representative of operations, therefore misleading. In March
2005, a concentration of 307 ppm was reported and a respective 14,092 lb Total P/day in the
discharge. In December 2005, a concentration of 10.7 ppm was reported and a respective 1,040
lb Total P/day in the discharge. In both cases these values are orders of magnitude greater than
what can physically be used and processed through manufacturing much less through
biotreatment and are evidently grossly in error. The likely scenario is either typographic or
analytical dilution calculation errors, in which both cases would be decimal place transposing
errors. Rather than just not include these two data points, for purposes of the Form 2C reporting
we chose to revise the numbers from 307 ppm to 0.307 ppm and 10.7 ppm to 0.107 ppm and
respective mass discharge of 14.092 and 10.4 lbs P/day. These are in ranges of normal reported
values of the time periods of concern and more in line with likely amounts from the operating
unit.

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