201706201120-1

Beverly Eaves Perdue
Governor
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Coleen K Sullins
Mx. Michael E. Johnson
Environmental Manager
E.I. DuPont de Nemours & Company
22828 NC Highway 87 West
Fayetteville, North Carolina 28306-7332
Dear Mr: Johnson:
Director
August 31, 2011
Subject: Draft NPDES Permit
Permit NC0003573
Fayetteville Works
Bladen County
Facility Class III
Dee Freeman
Secretary
Enclosed with this letter is a copy of the draft permit for your facility. Please review the draft very
carefully to ensure thorough understanding of the conditions and requirements it contains,
The draft permit contains the following significant changes from your current permit:
® One clarifier was added to the description of the tr
eatment facility.
® The permit limits have recalculated based on the latest OCPSF production information in accordance with
the 40 CFR 414 Subpart D.
® The limits for Cr, Cu, CN, Pb, Ni, and Zn were added to the permit in accordance with the 40 CFR 414
Subpart D.
® The limit for F was removed from the permit based on the statistical analysis of the effluent data and the
monitoring was reduced to quarterly. The instream monitoring for F was removed from the permit,
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Location: 512 N. Salisbury St. Raleigh, North Carolina 27604
Phone: [phone] FAX: [phone] t Customer Service: 1-877-623-6748
Internet: www.ncwaterquality,org
An Equal Opportunity 1 Affirmative Action Employer

Please submit any comments to me no later than thirty days following your receipt of the draft. Comments
should be sent to the address listed at the bottom of this page. If no adverse comments are received from the
public or from you, this permit will likely be issued in late October, with an effective date of December 1, 2011.
If you have any questions about the NPDES permit process, please contact me at the following e-mail
address: [e-mail], or telephone number: 919-807-6393.
Sincerely,
Sergei Chernikov, Ph.D.
Environmental Engineer II
Complex NPDES Permitting Unit
cc: NPDES Files
Fayetteville Regional Office / Surface Water Protection Section (e -copy)
Aquatic Toxicology Unit (e -copy)
TACU (e -copy)
EPA Region IV (with application, fact sheet, and RPA)
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Location: 512 N. Salisbury St. Raleigh, North Carolina 27604
Phone: [phone] FAX: [phone] \Customer Service: 1-877-623-6748
Internet: www,ncwaterquality.org
An Equal Opportunity\ Affirmative Action Employer

Permit NC0003573
TO DISCHARGE WASTEWATER UNDER THE
In compliance with the provisions of North Carolina General Statute 143-215.1, other lawful standards
and regulations promulgated and adopted by the North Carolina Environmental Management
Commission, and the Federal Water Pollution Control Act, as amended,
is hereby authorized to discharge wastewater and stormwater from a facility located at
22828 NC Highway 87
Duart Township
Bladen County
to receiving waters designated as the Cape Fear River in the Cape Fear River Basin in accordance with
effluent limitations, monitoring requirements, and other conditions set forth in Parts I
hereof. , II, III, and IV
The permit shall become effective
This permit and the authorization to discharge shall expire at midnight on October 31, 2016.
Signed this day
Coleen H. Sullins, Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit NC0003573
All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby
revoked, and as of this issuance, any previously issued permit bearing this number is no longer
effective. Therefore, the exclusive authority to operate and discharge from this facility arises under the
permit conditions, requirements, terms, and provisions included herein,
is hereby authorized to:
1. Continue to operate existing wastewater treatment facilities consisting of:
® equalization;
® neutralization;
® aerated pre -digester tank;
® nutrient feed system;
® aeration tank;
® three clarifiers;
® effluent flow measurement;
® tertiary filters
® DAF unit;
® rotary filter for sludge thickening;
® sludge pump;
® sludge filter press; and
® steam heated sludge dryers.
2. Discharge treated process wastewater from Butacite®, Nafion®, Sentryglas®, and PVF
(polyvinyl fluoride resin), process stormwater, sanitary wastewater, and co -neutralized
regenerate from said treated facilities through internal outfall 001;
3. Discharge stormwater, non -contact cooling water, boiler blowdown and condensate, and
treated wastewater effluent from 001, through outfall 002 at the location specified on
the attached map into the Cape Fear River, a class C water in the Cape Fear River
Basin.

Permit NC0003573
Beginning on the effective date of this permit and lasting through the expiration date, the Permittee is authorized
to discharge from Outfall 001. Such discharges shall be limited and monitored by the Permittee as specified
below:
1. Chronic Toxicity (Ceriodaphnia) P/F @ 3.3% February, May, August, November; see condition A. (4) of this
permit. The compliance monitoring point for chronic toxicity shall be downstream of the confluence of outfall
001 and 002.
i
THERE SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE AMOUNTS.
rem 1M IN IMMI I&ION1
FrING
1. Chronic Toxicity (Ceriodaphnia) P/F @ 3.3% February, May, August, November; see condition A. (4) of this
permit. The compliance monitoring point for chronic toxicity shall be downstream of the confluence of outfall
001 and 002.
i
THERE SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE AMOUNTS.

hermit NC0003573
Beginning on the effective date of this permit and lasting through the expiration date, the Permittee shall comply
with the limitations and monitoring frequencies established below at outfall 001:
PARAMETER
t
EFFLUENT LIMITATIONS
MONITORING REQUIREMENTS
Monthly
Average'
Daily
Maximuml
Measurement
Frequency
Sample
Type
Sample
Location
Acenaphthene
0.166
0.444
See Note 2
Grab
Effluent
Acenaphthylene
0.166
0.444
See Note 2
Grab
Effluent
Acrylonitrile
0.723
1.821
See Note 2
Grab
Effluent
Anthracene
0.166
12.8 ug/L
See Note 2
Grab
Effluent
Benzene
0.278
1.024
See Note 2
Grab
Effluent
Benzo(a)anthracene
0.166
0.444
See Note 2
Grab
Effluent
3,4-Benzofluoranthene
0.173
0.459
See Note 2
Grab
Effluent
Benzo(k)fluoranthene
0.166
0.444
See Note 2
Grab
Effluent
Benzo(a)pyrene
0.173
0.459
See Note 2
Grab
Effluent
Bis(2-ethylhexyl) phthalate
0.775
2.100
See Note 2
Grab
Effluent
Carbon Tetrachloride
0,135
0.286
See Note 2
Grab
Effluent
Chlorobenzene
0.113
0.211
See Note 2
Grab
Effluent
Chloroethane
0.783
2.017
See Note 2
Grab
Effluent
Chloroform
0.158
0.346
See Note 2
Grab
Effluent
2 -Chlorophenol
0.233
0.738
See Note 2
Grab
Effluent
Chrysene
0.166
0.444
See Note 2
Grab
Effluent
Di -n -butyl phthalate
0.203
0.429
See Note 2
Grab
Effluent
1,2 -Dichlorobenzene
0.580
1.227
See Note 2
Grab
Effluent
1,3 -Dichlorobenzene
0.233
0.331
See Note 2
Grab
Effluent
1,4 -Dichlorobenzene
0.113
0.211
See Note 2
Grab
Effluent
1,1-Dichloroethane
0.166
0.444
See Note 2
Grab
Effluent
1,2-Dichloroethane
0.512
1.588
See Note 2
Grab
Effluent
1,1-Dichloroethylene
0.120
0.188
See Note 2
Grab
Effluent
1,2-trans-Dichloroethylene
0.158
0.406
See Note 2
Grab
Effluent
2,4-Dichlorophenol
0.294
0.843
See Note 2
Grab
Effluent
1,2-Dichloropropane
1.152
1.731
See Note 2
Grab
Effluent
1,3-Dichloropropylene
0.218
0.331
See Note 2
Grab
Effluent
Diethyl phthalate
0.610
1.528
See Note 2
Grab
Effluent
2,4 -Dimethylphenol
0.135
0.271
See Note 2
Grab
Effluent
Dimethyl phthalate
0.143
0.354
See Note 2
Grab
Effluent
4,6-Dinitro-o-cresol
0.587
2.085
See Note 2
Grab
Effluent
2,4-Dinitrophenol
0.534
0.926
See Note 2
Grab
Effluent
2,4-Dimtrotoluene
0.851
2.145
See Note 2
Grab
Effluent
2,6-Dimtrotoluene
1.919
12.3 ug/L
See Note 2
Grab
Effluent
Ethylbenzene
0.241
0.813
See Note 2
Grab
Effluent

Permit NC0003573
LIMITATIONS r,
limitationsBeginning on the effective date of this permit and lasting through the expiration date, the Permittee shall comply
with the • monitoring frequencies,• • below at outfall 11
PARAMETER
EFFLUENT LIMITATIONS
MONITORING REQUIREMENTS
Average'
4
Daily
Maximuml
Measurement
Frequency
Sample
Type
1:Monthly Sample
Location
Fluoranthene
0.188
28.2 ug/L
See Note 2
Grab
Effluent
Fluorene
0.166
0.444
See Note 2
Grab
Effluent
Hexachlorobenzene
0.113
0.5 µg/L
Annually3
Grab
Effluent
Hexachlorobutadiene
0.151
0.369
See Note 2
Grab
Effluent
Hexachloroethane
0.158
0.406
See Note 2
Grab
Effluent
Methyl Chloride
0.647
1.430
See Note 2
Grab
Effluent
Methylene Chloride
0.301
0.670
See Note 2
Grab
Effluent
Naphthalene
0.166
0.444
See Note 2
Grab
Effluent
Nitrobenzene
0.203
0.512
See Note 2
Grab
Effluent
2-Nitrophenol
0.309
0.519
See Note 2
Grab
Effluent
4-Nitrophenol
0.542
0.933
See Note 2
Grab
Effluent
Phenanthrene
0.166
0.444
See Note 2
Grab
Effluent
Phenol
0.113
0.196
See Note 2
Grab
Effluent
Pytene
0.188
0.504
See Note 2
Grab
Effluent
Tetrachloroethylene
0.166
0.422
See Note 2
Grab
Effluent
Toluene
0.196
0.602
See Note 2
Grab
Effluent
1,2,4-Trichlorobenzene
0.512
1.054
See Note 2
Grab
Effluent
1,1,1 -Trichloroethane
0.158
0.406
See Note 2
Grab
Effluent
1,1,2 -Trichloroethane
0.158
0.406
See Note 2
Grab
Effluent
Trichloroethylene
0.158
0.406
See Note 2
Grab
Effluent
Vinyl Chloride
0.783
2.017
See Note 2
Grab
Effluent
Total Chromium
8.355
20.849
Annually
Grab
Effluent
Total Copper
10.914
25.441
Annually
Grab
Effluent
Total Cyanide
3.161
9.032
See Note 2
Grab
Effluent
Total Lead
2.409
5.194
See Note 2
Grab
Effluent
Total Nickel
12.720
29.957
Annually
Grab
Effluent
Total Zinc 7.903
19.645 Annually
Grab
Effluent
Notes•
1. All units are lbs/day unless otherwise noted.
2. Monitoring for the specified parameters has been waived based on a demonstration made by the Permittee in
accordance with 40 CFR 122.44(a)(2)(i). This waiver is good only for the term of the permit. Please note that
any exceedence of the effluent limitations found herein shall be considered a permit violation subject to
appropriate enforcement action.
3. The most sensitive analytical method available shall be employed for determining the presence of
hexachlorobenzene in the effluent.

Permit NC0003573
Beginning on the effective date of this permit and lasting through the expiration date, the Permittee is authorized
to discharge from Outfall 002 (boiler blowdown, once -through cooling water, and treated wastewater from
outfall 001) Such discharges shall be limited and monitored by the Permittee as specified below:
PARAMETER-
EFFLUENT LIMITATIONS
MONITORING REQUIREMENTS
Monthly Daily
Average Maximum
Measurement
Fre ueiic
Sample
eI
Sample
Location'
Flow (MGD)
Continuous
Recording
Effluent
Temperature, °C
See Note 2
Daily3
Grab
Effluent,
Upstream,
Downstream
BODS 20°C
Quarterly
Composite
Effluent
COD
Quarterly
Composite
Effluent
Fluoride (ug/L)
Quarterly
Grab
Effluent
Dissolved Oxygen
Weekly
Grab
Upstream,
Downstream
PFOA4
Monthly
Grab
Effluent
Total Phosphorus
Monthly
Composite
Effluent
Total Nitrogen
(NO2+NO3+TKN)
Monthly
Y
Composite
P
Effluent
Conductivity
Weekly
Grab
Upstream,
Downstream
pH
Between 6.0 and 9.0 Standard Units
3/Week
Grab
Effluent
1. Upstream shall be at the Permittee's river pump station; downstream shall be at the boat ramp approximately
4500 feet downstream at Prospect Hall Landing.
As a participant in the Cape Fear River Basin Association, the instream monitoring requirements as stated
above are waived. Should your membership in the agreement be terminated, you shall notify the Division
immediately and the instream monitoring requirements specified in your permit shall be reinstated.
2. The temperature of the effluent shall be such as not to cause an increase in the temperature of the receiving
stream of more than 2.8°C and in no case cause the ambient water temperature to exceed 32'C.
3. Daily shall be defined as every day except Saturdays, Sundays, and legal holidays. Instream temperature
sampling shall be conducted weekly.
4. PFOA (Perfluorooctanoic acid) - The Cape Fear River water intake may be sampled for PFOA on a monthly
basis and reported as an upstream parameter in DWQ Form — MR -3.
THERE SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE AMOUNTS.

Permit NC0003573
rLIrmRL`"�
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to
Ceriodaphnia dubia at an effluent concentration of 3.3%.
The permit holder shall perform at a minimum, quarterly monitoring using test procedures outlined in the "North
Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised February 1998, or subsequent versions or
"North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent
versions. The tests will be performed during the months of February, May, August, and November. Effluent
sampling for this testing shall be performed at the NPDES permitted final effluent discharge below all treatment
processes.
If the test procedure performed as the first test of any single quarter results in a failure or ChV below the permit
limit, then multiple -concentration testing shall be performed at a minimum, in each of the two following months
as described in "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998)
or subsequent versions.
The chronic value for multiple concentration tests will be determined using the geometric mean of the highest
concentration having no detectable impairment of reproduction or survival and the lowest concentration that does
have a detectable impairment of reproduction or survival. The definition of "detectable impairment," collection
methods, exposure regimes, and further statistical methods are specified in the "North Carolina Phase II Chronic
Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent versions.
All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge
Monitoring Form (MR -1) for the months in which tests were performed, using the parameter code TGP3B for the
pass/fail results and THP313 for the Chronic Value. Additionally, DWQ Form AT -3 (original) is to be sent to the
following address:
Attention: Environmental Sciences Section
North Carolina Division of Water Quality
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Environmental Sciences Section no later than 30
days after the end of the reporting period for which the report is made.
Test data shall be complete, accurate, include all supporting chemical/physical measurements and all
concentration/response data, and be certified by laboratory supervisor and ORC or approved designate signature.
Total residual chlorine of the effluent toxicity sample must be measured and reported if chlorine is employed for
disinfection of the waste stream.
Should there be no discharge of flow from the facility during a month in which toxicity monitoring is required, the
permittee will complete the information located at the top of the aquatic toxicity (AT) test form cating the
facility name, permit number, pipe number, county, and the month/year of the report with the notation of "No
Flow" in the comment area of the form. The report shall be submitted to the Environmental Sciences Section at
the address cited above.
Should the permittee fail to monitor during a month in which toxicity monitoring is required, monitoring will be
required during the following month.
Should any test data from this monitoring requirement or tests performed by the North Carolina Division of Water
Quality indicate potential impacts to the receiving stream, this permit may be re -opened and modified to include
alternate monitoring requirements or limits.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control organism
survival, minimum control organism reproduction, and appropriate environmental controls, shall constitute an
invalid test and will require immediate follow-up testing to be completed no later than the last day of the month
following the month of the initial monitoring.

Pexmit NC0003573
f C I
This permit shall be modified, or revoked and reissued to incorporate additional toxicity limitations and
monitoring requirements in the event toxicity testing or other studies conducted on the effluent or receiving
stream indicate that detrimental effects may be expected in the receiving stream as a result of this discharge.
The permittee shall not use any biocide except those approved in conjunction with the permit application. The
permittee shall notify the Director in writing not later than ninety (90) days prior to instituting use of any
additional biocide used in cooling systems which may be toxic to aquatic life other than those previously reported
to the Division of Water Quality. Such notification shall include completion of Biocide Worksheet Form 101 and a
map locating the discharge point and receiving stream.