DEQ-CFW_00047382

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The facility is subject to Federal Effluent Guidelines for Organic Chemicals, Plastic and Synthetic Fibers
under 4U[FRPart 414. The guidelines apply tothe manufacture ofrayon fibers, other fibers,
thermoplastic resins, commodity organic chemicals, bulk organic chemicals, and specialty organic
chemicals. These guidelines require limits for BOD, TSS and priority pollutants. The limits are calculated
based onproduction flows.
First VVILA-3/13/1976
1977 — DuPont started the fluorocarbon manufacturing facility (Nafion) the process included the
oxidation of hexafluoropropylene (HFP) to produce Hexafluoropropylene Epoxide (HFPO)
Waste Load Allocations: I9@4'I9@5, 1986 1989,1992
Processes: ButaciteO, Nafion" and Dymetrol" (No permits on file)
2995Permit renewal:
Permit application submitted December l,199S
Permit application included the following manufacturing processes:
1. Butaokel manufacture ofPolyvinyl Butyra|" (PV8), raw materials used 8utyra|dehydeand polyvinyl
alcohol
2.Manufacture ofHexaf|uoropropy|eneEpoxide (HFPO),raw material hexaf|uoropropy|ene(HFP)
3. Nafion" manufacture ofperf|uorinated intermediates, perf|uorinated resins and perf|uorinated
laminated films, raw material HFPO.
Permit issued July 25, 1996, effective September 1, 1996, expiration May 31, 2001. Permit writer Greg
Nizich,signed bVDavid Goodrich.
Internal OutfaU 001—VVVVTP, process wastewaters from 8utaciteO, NafionO, and Dymetro|8. O[PSF limits
for 8OD,TSSand Subpart | priority pollutants.
OutfaU OOJ—[ombined outfa||s, cooling waters, b|oxvdovvn, cooling tower b!o»vdown from BCH Energy,
stomvvater,UU1and UO6. Limits for fluoride.
Internal OutfaU OU6—low biodegradable process wastewaters from Nafiune. 8OD limits.
August 5, 1996 — Permit correction issued by Greg Nizich to revise the OCPS limits using the correct
production flow.

Septenmber26, 2000 — Division approved a replacing an existing vacuum pump with a new liquid ring
vacuum pump. The modification will generate an increase in fluorocarbons that gotothe V8VVTP in the
amount of228|b/xror0.61b/day,
October 20, 2000 — Request to determine if limits would change with the outfall relocation upstream of
Lock & Dam #3. Division withheld making decision until 2001-2002 as additional sampling and modeling
will beperformed.
2DO1Permit renewal:
Permit application submitted onMay D,ZUO1
DuPont requested the following modifications tothe permit:
l— 8CH Energy Project was shutdown.
2 — Add wastewaters from the new TeflonO facility for fluoropolymer resin manufacturing which
produces PMDF and fluoroproducts (APFO). The new facility started production in December 2000.
Process wastewaters are treated inthe VVWTP.
Permit application included the following manufacturing processes:
1.Butache0manufacturing produces Butacitel interlayer plastic sheeting and polyvinyl butyral resin
(PVB).Wastewaters generated are treated inthe VVVVTP. Expected to increase production within the
next five years.
I.NafiunOmanufacturing— produces NafiunOmembrane, Nafion"resins, NafionOSolutions, FLPRvinyl
ether monomers, HFPOmonomers.
3.Tef|on6—Tef|on" resins
4.APFO(Ammoniunperf|uoro'oxidate)manufacturing — produces APFOresins
Permit issued January 9, 2004, effective February 1, 2004, expiration October 31, 2006. Permit writer
Mark McIntire, signed by David Goodrich.
Internal OutfaUOU1—VV\NTP,wastewaters from ButadteO,Dymetro|o, Nafiono,Tef|une PMDF and
APFO, process stormm/ater, sanitary wastewater and co -neutralized regenerate. OCPSF limits for 8OD,
TSSand Subpart | priority pollutants.
Internal OutfaU O06—low biodegradable NafionO vvastexvasters. O[PSF limits for 8OD, T5S and Subpart]
priority pollutants.
Internal OutfaU 007' low biodegradable APFO wastewaters. O[PSF limits for 8OD,TSS and Subpart]
priority pollutants.
OutfaU UU2—combined internal outfa||s, non -contact cooling water, boiler b|oxvdom/n and condensate.
Limit for fluoride.
Permit was modified on February 3, 2004 (signed by Mark McIntire) with the following changes:

Internal Outfall 001 — eliminated Dymetrol and APFO WWTP from the wastewaters listed for this outfall,
wastewater from ButackeO' NafionO' TeflonOPMDFare still included
Internal OutfaU OO6'low biodegradable wastewaters from Na0ono
Internal Outfall 007 was eliminated, there will be no discharge of wastewaters from the APFO process
OutfaU DO2—combined outfaU, stormxvater, non contact cooling waters.
April 23, 2002 — Changes in discharges of Toxic Substances, DuPont requested clarification of the
reporting requirements in Part III (C) of the permit, whether it is required to report compounds that are
not detectable leaving theVVVVTP.
August 27, 2002 Request totreat wastewater from Nahun' containing Dimethy| Su|foxide (DK8SO) in
the VVVVTP.Division approved request December 2U,2OO2.
July 16i 2003— Division's letter to DuPont waiving instream monitoring requirements as they are
members ofthe Middle Cape Fear Basin Association.
2OO6Permit renewal:
May l,2UO6 DuPont submitted permit renewal application.
Permit application included the following manufacturing processes:
1. 8utadteO Manufacturing — produces Butadtel inter|ayer plastic sheeting and polyvinyl butyra| resin
(PVB).Wastewaters generated are treated inthe VVVVTP.
2. Nafion" Manufacturing — produces NafionO Membrane plastic film, Nafion" resins, FLPR vinyl ether,
and HFPO monomer. Wastewaters generated are treated inthe VVVVTP.
3. Tef|on" manufacturing — produces TeOonw FEP resin. Wastewaters generated are treated in the
VVVVTP.
4. APFO manufacturing-producesammonium perf|uorooctanoate. Wastewaters from the process are
collected and shipped off'site.
S. SentryG|asO Plus manufacturing —produces SentryG|asO Plus ionop|ast inter|ayer laminate. The
process facility was started in June 2005. No process wastewater discharged.
6. Proposed new manufacturing facility for polyvinyl fluoride polymer resin (PVF)—expectedto begin
production in OctoberJOO7. Wastewaters from the process expected to contain vinyl fluoride. The
estimated concentration ofvinyl fluoride atoutfa||OOZisO.O035mu/|. Wastewaters generated inthe
process will be treated inthe VVWTP.
Permit issued May 25, 2007, effective July 1, 2007, expiration October 31, 2011. Permit writer Teresa
Rodriguez, signed byGil Vinzani
Internal OutfaUO01—wastewater from 8utackeO,NafionO,TefonOPMDFand PVF,process stormwoter,
sanitary wastewater and co -neutralized regenerate. OutfaU includes effluent guidelines limits for 8OD
and TSSand Subpart | priority pollutants.

OuthaU0UJ Combined outfall. Includes limit for fluoride, instrearn monitoring for fluoride and effluent
monitoring for PFOA.Footnote had optional upstream sampling for PFOA.
Internal OutfaU 006was eliminated, the wastewaters from Nafiono we rerouted tothe VVVVTP.
December 5, 2007 — Notification of discharge of fluoromalonate from the WWTP clarifier at 0.97 mg1l.
December 7, 2015 — Review of DuPont's Qual2K model report, DEQ concurs that relocation will not
affect the dissolved oxygen levels in the Cape Fear River. DuPont can proceed with a permit modification
request torelocate the discharge.
February 26, 2008 — A permit modification was issued to allow the relocation of outfall 002. The
proposed outfa||location iuupstream Lock and Dam 3.
July 15'2008—Authorization toConstruct issued for clarifier #3.
August 3, 2009 — DuPont informed the Division that they shut down the TeflonO PM DF manufacturing
facility. This process manufactured Teflon using CO2 as the solvent. This process was 0.5% of the
influent flow to the WVVTP.DVVOinformed DuPont that apermit mod was not needed for this change, it
would beaddressed inZ022renewal.
August 26, 2010 — meeting with DuPont and DWM to discuss replacing PFOA with GenX.
Decenmber21^ 2O10—Authorization to Construct approval to relocate OotfaU 002 upstream of Luck and
Dam #3.Signed bySeth Robertson.
June 20, 2011 — Received Engineer's Certification for the completion of clarifier #3.
2O12Permit renewal:
May 2,2U11—DuPont submitted permit renewal application
Permit application included the following manufacturing processes:
1. 8utadteO manufacturing — produces 8utacitel |nter|ayer plastic sheeting and polyvinyl butyra| resin
(PVB).Wastewaters generated are treated inthe VVVVTP.
2. Nafion" manufacturing — produces NafionO Membrane plastic film, Nafion" resins, FLPR vinyl ether,
and HFPO monomer. Wastewaters generated are treated in theVV\NTP.
3. Polymer processing aides (PPA) manufacturing no process wastewaters are discharged.
4. SentryG|asO manufacturing — produces SentryG|as" ionop|ast inter|ayer laminate. No process
wastewater discharged.
S. PVF manufacturing— polyvinyl fluoride resin. Wastewaters generated are treated in the\NVVTP.
Permit issued February 6, 2012, effective March 1, 2012, expiration October 31, 2016. Permit writer
Sergei[hern|kov,signed byTom 8einick.

Internal OutfaU 001—VVVVTP, treated process wastewaters from Butacheo, Nafion", SentryG|as"
(Cooling water), and PVF and neutralized regenerate. Outfall includes Effluent Guidelines limits for BOD
and TSSand Subpart | priority pollutants.
OuttaUOOZ—combined oudaU.Includes PFOAmonitoring. Fluoride limit was eliminated based ona
Reasonable Potential Analysis.
February 25, 2015 — 316(b) preliminary determination letter sent to DuPont. Received response from
them unMarch D,2D15�
June 24, 2015- Meeting between DEQ and Dupont to discuss EPA study that identified a new
pe/f|uorinatedcompound inthe Cape Fear Basin.
October 28, 2015 - Change in ownership from DuPont to Chemours. Approved and signed by Tom
Be|nick.
February26, 2016 — Division approved a|ternative316(b) schedule requested byChenouuoon October
25, 2015 in accordance with 40CFR 125.
2016 Permit Renewal:
K4ay3, 2016—Chemours submitted permit renewal application
Permit application included the following manufacturing processes:
1. [hemours F|uonnmonomers/NafionO manufacturing — produces NafionO Membranes, Nafione
polymer dispersions, HFP0 monomer and vinyl ether monomers. Wastewaters generated are treated in
theVVVVTP.
I. [hemours Polymer processing aid production' no process wastewaters are discharged, they are
collected and shipped oMf-site.
3. Kuraray 8utadte"—produces 8utacite inter|ayer plastic sheeting and and polyvinyl butyra| resin.
Wastewaters generated are treated inthe VVVVTP.
4. Kuraray5entryG|asO—produces SentryG|asO ionop|ast inter|ayer|aminate. No process water
generated. Non- contact cooling water isdischarged toOutfa||OOZ
5. DuPont Polyvinyl fluoride (PVF)—produces polyvinyl fluoride resin. Wastewaters generated are
treated in theVVVVTP.
OuthaUsDeschption:
Internal OuttaU 001 isthe discharge from the \NVVTP.The VV\NTP is biological treatment system. K
receives wastewaters from manufacturing processes, process areas stormvvater, sanitary wastewaters,
and regenerate from the water deminera|izabon system.
OuthaU 002 isthe outhaU to the [ape Fear River. |tcombines the effluent from internal outfaU 001vvhh