DEQp00021382

AW6,
FW ATDMichael F. Easley
Governor
William G. Ross, Jr., Secretary
—i North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E., Director
Division of Water Quality
December 2.0, 2006
Mr. Michael E. Johnson
Environmental Manager
E.I. DuPont de Nemours & Company
22828 NC Hwy 87 W
Fayetteville, North Carolina 28306-7332
Subject: NPDES Draft Permit
Permit No. NC0003573
Fayetteville Works
Bladen County
Dear Mr. Johnson:
Please find enclosed the DRAFT permit for the subject wastewater treatment plant for your
review and comment. The draft permit includes the following modifications to your existing
permit:
• Outfall 006 was eliminated from the permit as requested. This outfall is not in
operation.
• Wastewaters from the Polyvinyl Fluoride (PVF) process was included in the
supplement to permit cover sheet under the authorized discharges to the wastewater
treatment plant.
Please provide any comments you have regarding the draft permit to this office by
January 26, 2006. At this time, the Division is also publishing a notice in the newspapers of
general circulation in Bladen County, inviting public comment on the draft permit. Following
the 30 -day comment period, we will review all pertinent comments received and take
appropriate action on the permit renewal.
If you have any questions concerning the draft permit or the other requirements for your
facility, please call me at [phone], extension 553.
Sincerely,
Teresa Rodriguez
Eastern NPDES Program
Cc: NPDES Files
Fayetteville Regional Office - Surface Water Protection
Aquatic Toxicology Unit
EPA Region 4
Npr thCarolma
aturally
North Carolina Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617 Phone [phone] Customer Service
Internet: h2o.enr.state.nc.us 512 N. Salisbury St. Raleigh, NC 27604 FAX [phone]
An Equal Opportunity/Affirmative Action Employer -50% Recvcled/10% Post Consumer Paper

Permit NC0003573
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER (,QUALITY
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
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,
E.I. DuPont de Nemours & Co.
is hereby authorized to discharge wastewater and stormwater from a facility located at
DuPont - Fayetteville Works
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, II, III, and IV
hereof.
The permit shall become effective .
This permit and the authorization to discharge shall expire at midnight on October 31, 2011.
Signed this day .
Alan W. Klimek, P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit NC0003573
SUPPLEMENT TO PERMIT COVER SHEET
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.
E.I. DuPont de Nemours & Co., Inc.
is hereby authorized to:
Continue to operate existing wastewater treatment facilities consisting of:
• equalization;
• neutralization;
• aerated pre -digester tank;
• nutrient feed system;
• aeration tank;
• dual clarifiers;
• effluent flow measurement;
• tertiary filters
• DAF unit;
• rotary filter for sludge thickening;
• sludge filter press; and
• steam heated sludge dryers.
2. Discharge treated process wastewater from Butacite, Nafion, Teflon® PMDF, and PVF,
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.

I
Permit NC0003573
A. (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
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:
PARAMETER
EFFLUENT LIMITATIONS
MONITORING REQUIREMENTS
Monthly Daily Maximum
Average
Measurement
Frequency
Sample Sample
Type Location
Flow (MGD)
2.0
Continuous
Recording Effluent
BODs, 200 C
191.3 lbs/day 508.2 lbs/day
3/Week
Composite Effluent
Total Suspended Solids
317.8 lbs/day 10301bs/day
3/Week
Composite Effluent
Temperature
Weekly
Grab Effluent
Oil & Grease
Monthly
Grab Effluent
Chronic Toxicity
See Note 1
Quarterly
Composite LSee Note 1
pH
Between 6.0 and 9.0 Standard Units
3/Week
Grab Effluent
40 CFR 414 Subpart I
See Condition A. (2)
Notes:
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.
THERE SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE
AMOUNTS.

Permit NC0003573
A. (2) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - SUBPART I
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
EFFLUENT LIMITATIONS
MONITORING REQUIREMENTS
Monthly
Average'
Daily
Maximum'
Measurement
Frequency
Sample
T e
Sample
Location
Acenaphthene
0.174
0.465
See Note 2
Grab
Effluent
Acenaphthylene
0.174
0.465
See Note 2
Grab
Effluent
Acrylonitrile
0.757
1.909
See Note 2
Grab
Effluent
Anthracene
0.174
0.465
See Note 2
Grab
Effluent
Benzene
0.292
1.073
See Note 2
Grab
Effluent
Benzo(a)anthracene
0.174
0.465
See Note 2
Grab
Effluent
3,4-Benzofluoranthene
0.181
0.481
See Note 2
Grab
Effluent
Benzo(k)fluoranthene
0.174
0.465
See Note 2
Grab
Effluent
Benzo(a)pyrene
0.181
0.481
See Note 2
Grab
Effluent
Bis(2-ethylhexyl) phthalate
0.813
2.201
See Note 2
Grab
Effluent
Carbon Tetrachloride
0.142
0.300
See Note 2
Grab
Effluent
Chlorobenzene
0.118
0.221
See Note 2
Grab
Effluent
Chloroethane
0.821
2.114
See Note 2
Grab
Effluent
Chloroform
0.166
0.363
See Note 2
Grab
Effluent
2 -Chlorophenol
0.245
0.773
See Note 2
Grab
Effluent
Chrysene
0.174
0.465
See Note 2
Grab
Effluent
Di -n -butyl phthalate
0.213
0.450
See Note 2
Grab
Effluent
1,2 -Dichlorobenzene
0.608
1.286
See Note 2
Grab
Effluent
1,3 -Dichlorobenzene
0.245
0.347
See Note 2
Grab
Effluent
1,4 -Dichlorobenzene
0.118
0.221
See Note 2
Grab
Effluent
1,1-Dichloroethane
0.174
0.465
See Note 2
Grab
Effluent
1,2-Dichloroethane
0.536
1.665
See Note 2
Grab
Effluent
1,1-Dichloroethylene
0.126
0.197
See Note 2
Grab
Effluent
1,2-trans-Dichloroethylene
0.166
0.426
See Note 2
Grab
Effluent
2,4-Dichlorophenol
0.308
0.884
See Note 2
Grab
Effluent
1,2-Dichloropropane
1.207
1.815
See Note 2
Grab
Effluent
1,3-Dichloropropylene
0.229
0.347
See Note 2
Grab
Effluent
Diethyl phthalate
0.639
1.602
See Note 2
Grab
Effluent
2,4 -Dimethylphenol
0.142
0.284
See Note 2
Grab
Effluent
Dimethyl phthalate
0.150
0.371
See Note 2
Grab
Effluent
4,6-Dinitro-o-cresol
0.615
2.185
See Note 2
Grab
Effluent
2,4-Dinitrophenol
0.560
0.970
See Note 2
Grab
Effluent
2,4-Dinitrotoluene
0.892
2.249
See Note 2
Grab
Effluent
2,6-Dinitrotoluene
2.012
5.057
See Note 2
Grab
Effluent
Ethylbenzene
0.252
0.852
See Note 2
Grab
Effluent

Permit NC0003573
A. (2) SUBPART I REQUIREMENTS (CONTINUED)
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
EFFLUENT LIMITATIONS
MONITORING REQUIREMENTS
Monthly
Average'
Daily
Maximum'
Measurement
Frequency
Sample
Type
Sample
Location
Fluoranthene
0.197
0.536
See Note 2
Grab
Effluent
Fluorene
0.174
0.465
See Note 2
Grab
Effluent
Hexachlorobenzene
0.5 lig/L
Annually3
Grab
Effluent
Hexachlorobutadiene
0.158
0.387
See Note 2
Grab
Effluent
Hexachloroethane
0.166
0.426
See Note 2
Grab
Effluent
Methyl Chloride
0.679
1.499
See Note 2
Grab
Effluent
Methylene Chloride
0.316
0.702
See Note 2
Grab
Effluent
Naphthalene
0.174
0.465
See Note 2
Grab
Effluent
Nitrobenzene
0.213
0.536
See Note 2
Grab
Effluent
2-Nitrophenol
0.323
0.544
See Note 2
Grab
Effluent
4-Nitrophenol
0.568
0.978.
See Note 2
Grab
Effluent
Phenanthrene
0.174
0.465
See Note 2
Grab
Effluent
Phenol
0.118
0.205
See Note 2
Grab
Effluent
Pyrene
0.197
0.529
See Note 2
Grab
Effluent
Tetrachloroethylene
0.174
0.442
See Note 2
Grab
Effluent
Toluene
0.205
0.631
See Note 2
Grab
Effluent
1,2,4-Trichlorobenzene
0.536
1.105
See Note 2
Grab
Effluent
1,1,1 -Trichloroethane
0.166
0.426
See Note 2
Grab
Effluent
1,1,2 -Trichloroethane
0.166
0.426
See Note 2
Grab
Effluent
Trichloroethylene
0.166
0.426
See Note 2
Grab
Effluent
Vinyl Chloride
0.821
2.114
See Note 2
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. A sufficiently sensitive analytical technique shall be employed for determining the presence of
hexachlorobenzene in the effluent.

Permit NC0003573
A. (3) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
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:
Notes:
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.
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 2.8oC and in no case cause the ambient water temperature to exceed 320C.
3. Daily shall be defined as every day except Saturdays, Sundays, and legal holidays. Instream temperature
sampling shall be conducted weekly.
4. The samples for fluoride shall be taken downstream of the 001 discharge, unless or until, all neutralized
Nafion area streams are discharged entirely into the cooling water outfall, 002. Instream fluoride monitoring
shall be conducted monthly and shall coincide with effluent monitoring.
THERE SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE
AMOUNTS.
EFFLUENT LIMITATIONS
MONITORING REQUIREMENTS
PARAMETER
Monthly
Daily Maximum
Measurement
Sample
Sample
Average
Frequency
Type
Location'
Flow (MGD)
Continuous
Recording
Effluent
Effluent,
Temperature, °C
See Note 2
Daily'
Grab
Upstream,
Downstream
BODS, 200 C
Quarterly
Composite
Effluent
COD
Quarterly
Composite
Effluent
Effluent,
Fluoride4
7917lbs/day
Weekly
Grab
Upstream,
Downstream
Dissolved Oxygen
Weekly
Grab
Upstream,
Downstream
Total Phosphorus
Monthly
Composite
Effluent
Total Nitrogen
(NO2+NO3+TKN)
Monthly
Composite
Effluent
Conductivity
Monthly
Grab
Upstream,
Downstream
pH
Between 6.0 and 9.0 Standard Units
3/Week
Grab
Effluent
Notes:
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.
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 2.8oC and in no case cause the ambient water temperature to exceed 320C.
3. Daily shall be defined as every day except Saturdays, Sundays, and legal holidays. Instream temperature
sampling shall be conducted weekly.
4. The samples for fluoride shall be taken downstream of the 001 discharge, unless or until, all neutralized
Nafion area streams are discharged entirely into the cooling water outfall, 002. Instream fluoride monitoring
shall be conducted monthly and shall coincide with effluent monitoring.
THERE SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE
AMOUNTS.

Permit NC0003573
A. (4) CHRONIC TOXICITY PERMIT LIMIT (QUARTERLY) — OUTFALL 001
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 11 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 THP3B 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 indicating 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.

Permit NC0003573
A. (5) RE -OPENER CONDITION
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.
A. (6) BIOCIDE CONDITION
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.