DEQp00022339

State of North Carolina.: ;
Department of Environment,
Health and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Jonathan B. Howes, Secretary
A. Preston Howard, Jr., P.E., Director
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Facsimile Cover Sheet
July 18, 1996
To: Mr. Mike Johnson, Dupont Automotive
Fax: [phone]
From: Greg Nizich
Phone: [phone], ext. 541.
Fax: [phone]
3 pages, including this cover sheet.
Unfortunately, I mistakenly ommitted some instream monitoring requirements for this renewal. I
am sending the effluent sheet for 002 which has been amended with these additions. TP and TN
monitoring has been transferred from 001 to 002, so 001 is being sent along too. We are
requiring all major facilities in the sub -basin to perform instream monitoring. Since DuPont's
oxygen demanding load is near 10% of the total allocated in the sub -basin, it is one of the highest,
and therefore the Division has added the instream requirements. Instream fluoride monitoring
(monthly) is also being added, but as always this can be reduced or removed if sampling data
shows it's justified.
I will be in Winston-Salem all day today, but you can leave me a voice -mail message or get up
with me on Friday. If you would like to submit written comments on these changes let me know.
If these modifications are not an issue we will probably issue the permit with in a week. I'm
sorry this oversight wasn't caught sooner.
l
JUL 1996
CENTRAL FILES
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/ 10% post -consumer paper

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Wasteload Allocation Summary
(approach taken, correspondence with region, EPA, etc.)
The Fayetteville facility has two main process areas: 1) Butacite and PVB intermediates and 2)
Nafion and perfluoronated intermediates. Currently, both process waste streams go through the
treatment plant and are discharged via Outfall 001. DuPont is proposing to route the Nafion stream
around the waste treatment plant because the only :significant pollutant in it is fluoride which is not
removed in the treatment process, so the Nafion stream only constitutes extra hydraulic loading that
lowers retention time in the plant for the treatable PVB waste stream. The Nafion stream would
have to re-enter the Outfall 001 stream prior to the OCPSF sampling and limitation point or such
requirements will have to be applied to it separately.
Only minor changes are recommended for this rend al. Updated application of federal
effluent guidelines will cause a slight reduction of BO�i'mits for this renewal. TP/TN monitoring
requirement has been shifted to Outfall 002 in order to measure nutrient loading to the river. Please
also note the addition of instream monitoring requirements.
Special Schedule Requirements and additional comments from Reviewers:
Recommended by: Date: a
/16
Reviewed by
Instream Assessment: Date: a /�
Regional Supervisor: ` �_�� �'- '` ` Date:`'
Permits & Engineering:
RETURN TO TECHNICAL SUPPORT BY:
FACT SHEET FOR WASTELOAD ALLOCATION
Request
Facility Name:
E.I. DuPont de Nemours & Co.-
Fayettevi Works,
E;
NPDES No.:
NC0003573
Type of Waste:
97% Industrial, 3% Domestic
Facility Status:
Existing
Permit Status:
Renewal
Receiving Stream:
Cape Fear River
-,
Stream Classification:
C
FRf'L_r „
. _ ' - `-'
Subbasin:
03-06-16>
County:
Bladen
Stream Characteristic:
Regulated
Regional Office:
Fayetteville
Source:
Jordan Dam -1-1r,
Requestor:
Greg Nizich
Date:
1989,, _
Date of Request:
12/6/95
Drainage Area (mi2):
4790 f
Topo Quad:
H23SE
Summer 7Q10 (cfs):
791
Average Flow (cfs):
5676 ='
IWC (%):
.2' =y
Wasteload Allocation Summary
(approach taken, correspondence with region, EPA, etc.)
The Fayetteville facility has two main process areas: 1) Butacite and PVB intermediates and 2)
Nafion and perfluoronated intermediates. Currently, both process waste streams go through the
treatment plant and are discharged via Outfall 001. DuPont is proposing to route the Nafion stream
around the waste treatment plant because the only :significant pollutant in it is fluoride which is not
removed in the treatment process, so the Nafion stream only constitutes extra hydraulic loading that
lowers retention time in the plant for the treatable PVB waste stream. The Nafion stream would
have to re-enter the Outfall 001 stream prior to the OCPSF sampling and limitation point or such
requirements will have to be applied to it separately.
Only minor changes are recommended for this rend al. Updated application of federal
effluent guidelines will cause a slight reduction of BO�i'mits for this renewal. TP/TN monitoring
requirement has been shifted to Outfall 002 in order to measure nutrient loading to the river. Please
also note the addition of instream monitoring requirements.
Special Schedule Requirements and additional comments from Reviewers:
Recommended by: Date: a
/16
Reviewed by
Instream Assessment: Date: a /�
Regional Supervisor: ` �_�� �'- '` ` Date:`'
Permits & Engineering:
RETURN TO TECHNICAL SUPPORT BY:

2
TOXICS/METALS/CONVENTIONAL PARAMETERS
OUTFALL 001 - Process Wastewater
Monthly Avg. Daily Max.
Flow (MGD):
2.0
Flow (MGD):
monitor
BOD5 (lbs/day):
175.4
467.7
monitor quarterly
TSS (lbs/day):
292.3
950.1
5000 EL
DO (mg/1):
monitor
TP (mg/1):
monitor
pH (SU):
6.0-9.0
6.0-9.0
temperature of the receiving stream of more than 2.8°C and i nqj
Oil & Grease (lbs/day):
monitor
TN (mg/1):
monitor
TP (mg/1):
monitor
Recommended Limits
Monthly Avg.
Daiiy Max.
WQ or EL
Flow (MGD):
2.0
BOD5 (lbs/day):
157.5
420.1
EL
TSS (ibs/day):
262.5
853.3
EL
DO (mg/1):
pH (SU):
6.0-9.0
6.0-9.0
EL
Oil & Grease (lbs/day):
monitor
OCPSF Parameters:
See attached list
OUTFALL 002 - Non -contact Cooling Water
Existing Limits
Monthly Avg. Daily Max.
Flow (MGD): monitor
BOD5 (lbs/day): monitor quarterly
COD (lbs/day): monitor quarterly
pH (SU): 6.0-9.0 6.0-9.0
Flouride (lbs/day): 5000
Temperature (°C) The temperature of the effluent shall not 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.
Recommended Limits
Monthly Avg. Daily Max. WQ or EL
Flow (MGD):
monitor
BODS (lbs/day):
monitor quarterly
COD (lbs/day):
monitor quarterly
pH (SU).
6.0-9.0 6.0-9.0 EL
Flouride (lbs/day):
5000 EL
TN (mom)' b r'� �,
monitor
TP (mg/1):
monitor
Temperature (°C)
The temperature of the effluent shall not cause an increase in the
temperature of the receiving stream of more than 2.8°C and i nqj
cause the ambient water temperature to exceed 32°F.
JUL
C'ENTPAL F'LES

WHOLE EFFLUENT TOXICITY TEST
Type of Toxicity Test: Chronic (Ceriodaphnia) Quarterly P/F @ IWC
Existing Limit: P/F @ 3.3% (applied to combined final outfall)
Recommended Limit: Renew with existing limit.
Monitoring Schedule: Feb., May, Aug., Nov.
Limits Changes Due To:
Change in 7Q10 data
Change in stream classification
Relocation of discharge
Updated application of fed. effluent guidelines X
New pretreatment information
�viisite ivnicavy :i%uiay, interucuvaa, etc.;
Parameter(s) Affected
BOD, TSS, OCPSF parameters n6
Parameter(s) are water quality limited. For some parameters, the available load capacity of
the immediate receiving water will be consumed. This may affect future water quality based
effluent limitations for additional dischargers within this portion of the watershed.
100
X No parameters are water quality limited, but this discharge may afi:rt future allocations.
INSTREAM MONITORING REQUIREMENTS
Upstream Location: U.S. Army Corps Lock & Dam #3 s�w� e sP e�� ���� w�. re—
Downstream Location: Prospect Hall Landing -6 'IF (ACC
Parameters: Temperature, Dissolved Oxygen, Conductivity, Fluoride PA- --~
if
Special instream monitoring locations or monitoring frequencies:
Instream monitoring for fluoride should occur monthly.
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JUL 30 1996
CENTRAL FILES

4
• T
MISCELLANEOUS INFORMATION & SPECIAL CONDITIONS
Has the facility demonstrated Me ability to meet the proposed new limits with existing treatment
facilities? Yes No ✓✓ �� �'- ' ~ �``
If no, which parameters cannot be met?
Would a "phasing in" of the new limits be appropriate? Yes No
If yes, please provide a schedule (and basis for that schedule) with the regional
office recommendations:
k l i 1 G
If no, why not?
Wasteload sent to EPA? (Major) Y (Y or N)
(If yes, then attach updated evaluation of facility, including toxics analysis, modeling analysis if
modeled at renewal, and description of how it fits into basinwide plan)
Additional Information attached? Y (Y or N) If yes, explain with attachments.
1. List of OCPSF parameters and limits.
2. Summary of federal effluent Guidelines applied to WLA.
3. Toxicity test fact sheets.
T.
JUL SQ 199E
CENTRAL FILES
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If no, why not?
Wasteload sent to EPA? (Major) Y (Y or N)
(If yes, then attach updated evaluation of facility, including toxics analysis, modeling analysis if
modeled at renewal, and description of how it fits into basinwide plan)
Additional Information attached? Y (Y or N) If yes, explain with attachments.
1. List of OCPSF parameters and limits.
2. Summary of federal effluent Guidelines applied to WLA.
3. Toxicity test fact sheets.
T.
JUL SQ 199E
CENTRAL FILES
_ .a

Facility Namei)cS Permit # AJC ,Q0,1- 73 Pipe # DD
E
CHRONIC TOXICITY PASS/FAIL PERMIT LIMIT (QRTRLY)
The effluent discharge shall at no time exhibit chronic toxicity using test procedures outlined in:
l.) The North Carolina CeriodUhnia chronic effluent bioassay procedure (North Carolina Chronic Bioassay
Procedure - Revised *September 1989) or subsequent versions.
The effluent concentration at which there may be no observable inhibition of reproduction or significant mortality
is ,3.2 % (defined as treatment two in the North Carolina procedure document). The permit holder shall perform
quarterquarterU monitoring using this procedure to establish compliance with the permit condition. The first test will be
performed after thirty days from the effective date of this permit during the months of
. Effluent sampling for this testing shall be performed at the NPDES
permitted ff&l e ent discharge below all treatment processes.
All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge
Monitoring Form (MR -1) for the month in which it was performed, using the parameter code TGP3B.
AdAit;nnally, DEM Form -AT -1 (orisrinal) k to be sent to the following address:
Attention: Environmental Sciences Branch
North Carolina Division of
Environmental Management
4401 Reedy Creek Road
Raleigh, N.C. 27607
Test data shall be complete and accurate and include all supporting chemical/physical measurements performed in
association with the toxicity tests, as well as all dose/response data. Total residual chlorine of the effluent toxicity
sample must be measured and reported if chlorine is employed for disinfection of the waste stream.
Should any single quarterly monitoring indicate a failure to meet specified limits, then monthly monitoring will
begin immediately until such time that a single test is passed. Upon passing, this monthly test requirement will
revert to quarterly in the months specified above.
Should any test_ data from this monitoring requirement or tests performed by the North Carolina Division of
Environmental Management 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 specked in the cited document, such as minimum control organism
survival and appropriate environmental controls, shall constitute an invalid test and will require immediate
retesting(within 30 days of initial monitoring event). Failure to submit suitable test results will constitute
noncompliance with monitoring requirements.
7Q10 771 cfs
Permitted Flow MGD
IWC 3. Z %
Basin & Sub -basin _ 03-6 I6,
Receiving Stream CA4e, r Arc i
County Al adr_�
QCL PIF Version 9191
Recommended by:
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JUL So 1996
CENTRAL FILES

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CENTRAL FILES

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N READY FOR INPUT�KE��8/M�'
CGMPLIANCE EVALUATION
ANALY%I%
REPORT
PA�E i
PERMIT--NC0003573
PIPE--O�i
REPORT PERIOD�
95O2 -960i
LOC ---E
FACILITY--DUPONT-FAYETTEVILLE
DE%I�N
FLOW--
2.00OO
CLA%%--2
LOCATION--FAYETTEVILLE
RE�ION/COUNTY--06
BLADEN
50050 0»3i0 08530
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22.45
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7.6-7.i
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SOC PRIORITY PROJECT: Yes No
If yes, SOC No. _x
To: Attention -r Greg Nizi h,-
Permits ar�Engineering Unit
Water Quality Section
February 21, 1996
NPDES STAFF REPORT AND RECOMMENDATIONS
County ,Bladen
Permit N :' NC0003573
PART I. GENERAL INFORMATION
1. Facility and Address: E.I. DuPont de Nemours & Co., Inc. �e
P.O. Drawer z 9`96
Fayetteville, North Carolina 28302
2. Date of Investigation: January 25, 1996
3. Report Prepared By: Ken Averitte, FRO
4. Persons Contacted and Telephone Number: Mr. Michael Johnson,
Environmental Coordinator
E.I. DuPont, Fayetteville Works
[phone]
Mr. Robert Geddie, ORC
[phone]
5. Directions to Site: This facility is located at the Bladen -Cumberland
County line, between Highway 87 and the Cape Fear River.
6. Discharge Point(s), List for all discharge points:
Latitude: 340 49' 52" Longitude: 780 49' 00"
Attach a USGS map extract and indicate treatment facility site and
discharge point on map.
USGS Quad No.: H 23 SE USGS Quad Name: Duart, NC
7. Site size and expansion area consistent with application?
x Yes No (If no, explain)
DuPont owns approximately 2,600 acres at this site.
8. Topography (relationship to flood plain included);',,
JUL 30 1996
CENTRAL FIL-0

9. Location of nearest dwelling: None within 1,000 feet.
10. Receiving stream or affected surface waters: UT to the Cape Fear River
a. Classification: C
b. River Basin and Subbasin No.: 030616
C. Describe receiving stream features and pertinent downstream uses:
The combined waste discharges from this facility flow in a wood
lined channel installed as an effluent and storm water conveyance.
This combined flow discharges over a fabri-formed concrete lined
ditch until velocities are diminished and thence to the UT. Under
normal (dry) conditions, this facility produces most of the flow in
the UT. The Cape Fear River is located approximately 2500 feet
downstream. (The discharge point has historically been indicated as
the main stem of the Cape Fear River.)
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. a. Volume of Wastewater to be permitted: 2.0 MGD (Ultimate Design
Capacity) of the treatment plant, discharge point 001. A separate
discharge (002) is not flow limited.
b. What is the current permitted capacity of the Wastewater Treatment
facility? 2.0 MGD
C. Actual treatment capacity of the current facility (current design
capacity). 2.0 MGD
d. Date(s) and construction activities allowed by previous
Authorizations to Construct issued in the previous two (2) years.
The permit was modified in 1995 to include boiler blowdown and once
through cooling water from an adjacent solid waste incinerator.
e. Please provide a description of existing or substantially
constructed wastewater treatment facilities. The waste treatment
system, as described in the application, includes a .75 MG aer ted
flow equalization basin plus a .175 MG emergency retention
asr1 for
unsuitable wastewater, a .25 MG aerated pre -digester tank, nutrient
feed, a 1.70 MG aeration tank, two clarifiers, effluent flow
measurement, a DAF unit (out of service at the time), a rotary
filter for sludge thickening, a sludge press and steam heated sludge
dryers.
f. Please provide a description of proposed wastewater treatment
facilities: none anticipated.
g. Possible toxic impacts to surface waters: Properly operated, this
facility poses little toxicity threat. s�
y i E rk
h. Pretreatment Program (POTWs only) : N/A
a
In development Approved
�� �!,3.
Should be required Not needed
CENTRAL FILES
y

2. Residuals handling and utilization/disposal scheme:
a. If residuals are being land applied, please specify DEM Permit
No. .
Residual Contractor
Telephone No.
b. Residuals stabilization: PSRP PFRP Other
C. Landfill: The dried sludge produced at this facility is shipped to
the BFI, Inc., Subtitle D landfill located east of Roseboro in
Sampson County.
d. Other disposal/utilization scheme (Specify):
3. Treatment plant classification (attach completed rating sheet): IV
4. SIC Code(s): 2821, 2869, 3083, 3081, 4939
Wastewater Code(s) of actual wastewater, not particular facilities; i.e.,
non -contact cooling water discharge from a metal plating company would be
14, not 56.
Primary _14_ Secondary _22 _02_ _36_
Main Treatment Unit Code: 05001
PART III - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction Grants Funds or are
any public monies involved (municipals only)? n/a
2. Special monitoring or limitations (including toxicity) requests: none
3. Important SOC, JOC, or Compliance Schedule dates (please indicate):
Date
Submission of Plans and Specifications . . . . . . . .
Begin Construction . . . . . . . . . . . . . . . . . .
Complete Construction . . . . . . . . . . . . . . . .
4. Alternative Analysis Evaluation: Has the facility evaluated all of the
nondischarge options available. Please provide regional perspective for
each option evaluated.
Spray Irrigation: not practical
Connection to Regional Sewer System: not available
Subsurface: not practical `
JUL 30 1996
Other disposal options: none known
CENTRAL FILE

5. Other Special Items: This facility has previously been rated a class III
wastewater treatment plant. Under the newest rating system, it scored at
least 69 points, moving into the class IV category.
PART IV - EVALUATION AND RECOMMENDATION
It is the recommendation of this office that NC0003573 be reissued for an
additional five year period. Since this facility has been re-evaluated and is
considered a Class IV WWTP, the monitoring and operational requirements for
that plant classification should be included. The proposed changes have been
discussed with the ORC, Mr. Robert Geddie.
Signatur of Report Preparer
Water Quality Regional Supervisor
Date

RATING SCALE FOR CLASSIFICATION OF WATER POLLUTION CONTROL SYSTEMS
Name of Facility: - =�
Owner or Contact Person:
_:�Ic. —
Mailing Address:D ' Z /VC 5,L70 = — O
County://�� 4--- -Al Telephone: 9/D - 6 75"
Present Classification: New Facility Existing Facility_
NPDES Per. No. NC00 3.S Nondisc. Per. No.WO Health Dept.Per No.
Rated by: .+/ /i.i�: Telephone: Date:2
Reviewed by: Health Dept. Telephone:
Regional Office Telephone:
Central Office Telephone:
ORC:��o 8ave 7- za Grade: -QL Telephone: G 77--iZI 9
Check Classification (s): Subsurface Spray Irrigati Land Application
Wastewater Classification: (Circle One) . 1 11 111 IV Total Points: 6o�
SUBSURFACE CLASSIFiCATION
(check all units that apply)
1. septic tanks
2. pump tanks
3. siphon or pump -dosing systems
4. sand filters
5. grease trap/interceptor
6. oil/water separators
7. gravity subsurface treatment and disposal:
8. pressure subsurface treatment and disposal:
SPRAY IRRIGATION CLASSIFICATION
(check all units that apply)
1.
preliminary treatment (definition no. 32 )
2.
Iagoons
3.
septic tanks
4.
pump tanks
5.
pumps
6._sand
filter:
7.
grease trap/interceptor
8.
oil/water separators
9.
disinfection
10.
chemical addition for nutrient/algae control
11.
spray irrigation of wastewater
In addition to the above classifications, pretreatment of wastewater in excess of these components shall
be rated using the point rating system and will require an operator with an appropriate dual certification.
LAND APPLICATION/RESIDUALS CLASSIFICATION (Applies only to permit holder)
1. Land application of biosolids, residuals or contaminated soils on a designated site.
WASTEWATER TREATMENT FACILITY CLASSIFICATION
The following systems shall be assigned a Class 1 classification. unless the flow is of a significant quantity or the technology is unusually
complex, to require consideration by the Commission on a case-by-case basis: (Check if Appropriate)
1. O!Vwater Separator Systems consisting only of physical separation, pumps and disposal;
2. Septic Tank/Sand Filter Systems consisting only of septic tanks, dosing apparatus, pumps,sand filters, disinfection
and direct discharge;
3. Lagoon Systems consisting only of preliminary treatment, lagoons, pumps, disinfection, necessary chemical treatment for
algae or nutrient control, and direct discharge;
4. Closed-loop Recycle Systems;
5. Groundwater Remediation Systems consisting only of oiVwater separators, pumps, air-stri o ti edion
and disposal;
6. Aquaculture operations with discharge to surface waters; JUL 1996
7. Water Plant sludge handling and back -wash water treatment;
8. Seafood processing consisting of screening and disposal.
9._Single-family discharging systems, with the exception of Aerobic Treatment Units, will be das'eMr July 1,
1993 or if upon Inspection by the Division, k Is found that the system is not being adequately operated or m n n Such
systems will be notified of the classification or reclassification by the Commission, in writing.

The following scale is used for rating wastewater treatment facilities: (circle appropriate points)
REM POINTS
(1) Industrial Pretreatment Units or Industrial Pretreatment Program (see definition No. 33) ...................................................4
(2) DESIGN FLOW OF PLANT IN gpd [not applicable to non-oontaminated cooling waters, sludge handling facilities for
water purification plants, totally closed cycle systems(see definition No. 11), and facilities consisting only of item
(4)(d) or Items (4)(d) and (11)(d))
0 - 20,000......................................................................................................................................1
20,001 - 50,000......................................................................................................................................2
50,001 - 100.000.....................................................................................................................................3
100.001 - 250.000...................................................................................................................................4
250.001 - 500.000..................................................................................................................................
500.001 - 1,000.000..........................................................................................................................�0
1.000.001 - 2,000,000........................................................................................................................ .1
2.000.001 (arid up) rate 1 point additional for each 200.000 gpd capacity up to a maximum of ..............
Design Flow (gpd)
(3) PRELIMINARY UNrrS/PROCESSES (see definition No.32)
(a) BarScreens...............................................................................................................................................1
or
(b) Mechanical Screens, Static Screens or Comminuting Devices.............................................................»...........2
(c) Grit Removal..............................................................................................................................................i
or
(d) Mechanical or Aerated Grit Removal.............................................................................................................2
(a) Flow Measuring Device .».............................................................................................................................1
or
(1) Instrumented Flow Measurement ................................... ........
(g) Preaeration............ ...�.L1.LatC. rT. /� .�...........•..................................•.....�................
.(h) Influent Flow Equalization......................................................................................................................... 2
(1) Grease or Oil Separators - Gravity.................................................................................................................
Mechanical.................................................................................................................................................3
DissolvedAir Flotation................................................................................................................................8
(1) Prechlorination........................... »............................................................................................................. 5
(4) PRIMARYTREATMENTLINiTS/PROCESSES
(a) Septic Tank (see definition No. 43)....»......................................................................................................2
(b) Imhoff Tank..............................................................................................................................................5
(c) Primary Cladde.rs........................................................................................................................................5
(d) Settling Ponds or Settling Tanks for Inorganic Non•toxlo Materials (sludge handling facilities for water
purification plants, sand, gravel, stone, and other mining operations except recreational activities such as gem
orgold mining)........................................................................................................................................2
(5) SECON ARYTREATMENTUNnWROCESSES
(a) Carbonaceous Stage
(i) Aeration -High Purity Oxygen System..............................................»..............................2
DiffusedAir System.................................................................................................... 0
Mechanical Air System (fixed, floating or rotor)....................»...........................»...»........A
SeparateSludge Reaeration.............................................................................................3
Trickling Filter
HighRate..................................................................................................................7
Standard Rate..............................................................................................................5
PackedTower................................................................................................................5
(iii) Biological Aerated Filter or Aerated Biological Filter .....» .....................................................10
(IV) Aerated Lagoons..........................................................................................................10
(v) Rotating Biological Contactors......................................................................................10
(vi) Sand Filters -intermittent biological.....................................................»...........................2
Recirculating biological.....................................................................................................3
(vii) Stabilization Lagoons....................................................................................................
(Vul) Clarifier.......................................................................................................................
(ix) Single stage system for combined carbonaceous removal of BOD and nitrogenous removal by
nhrffloatlon (see definition No. 12)(Points for this hem have to be in addition to items
(5)(a)(1) through (5)(a)(viii), . a
utilizing the extended aeration process (see definition No.3a)..........................................2
utilizing other than the extended aeration process....................................................»......e
(x) Nutrient additions to enhance BOD removal .................................................. .................
©
(xi) Biological Culture ('Super Bugs')addhion........................................................................5
(b) Nitrogenous Stage
(1) Aeration High Purity Oxygen System ................................. »....»..........»....»..............20
Diffused Air System. .. .................................................................10
Mechanical Air System (fixed, floating or rotor) ........................................................... A
Separate Sludge Reaeration.............................................................................................3
(il)Trickling Filter -High Rate ................... <............................................................................... 7
StandardRate...............................................................................................................5
PackedTower................................................................................................................5
(Ili) Biological Aerated Filter or Aerated Biological Fllter........»........»».»........»».»».»...»».»».».10
(iv) Rotating Biological Contactors......................................................................................10
(v) Sand Filter - Intermittent biological..................................................................................2
Recirculating biological....................................................................................................2
(VI) CIarmw..........................................................................................................................5
(6) TER71AR1fORADVANCEOTREATMB4TUNnWFIOCESSES
(a) Activated Carbon Beds -
without carbon regeneration.................................................................. .........5
withcarbon regeneration.......................................................................
(b) Powdered or Granular Activated Carbon Feed- fir'
withoutcarbon regeneration.............................................................. ......................
with carbon regeneration.................................................................... ...................»....1
(c)
(d)
(0)
(f)
(h)
(I)
(k)
Airstripping.....................................................................
Denitrification Process.......................................................
FoamSeparation........................................».».......................................................
tonExchange..................................................................................................».....
Land Application of Treated Effluent (see definition No. 22b) (rat applicable for sand,
and other similar mining operations) by high rate Infiltration ...... .... ..... .... .... »... ...
/O
34
/0
...... ---•-...................................... -....... ------------------------------------ --
Phosphorous
Phosphorous Removal by Biological Processes (See definition No. 26) .......................:..:.....::..3.,.,...............20
Polishing Ponds - without aeration ....................................... .........:::::;�.»2
withaeration .............. ».»..»............................................. ...................................... ..... 5 .�

Facilities having a rating of one through four points, Inclusive, do not require a certified operator.
Facilities having an activated sludge process will be assigned a minimum classification of Class If.
Facilities having treatment processes for the removal of metal or cyanide will be assigned a minimum classification of Class II.
Facilities having treatment processes for the biological removal of phosphorus will be assigned a minimum classification of Class ill.
MU DEFINITIONS
The following definitions shall apply throughout this Subchapter.
(1) Activated Carbon Beds. A physicallchemical method for reducing soluble organic material from wastewater effluent; The column -type beds used in this
method will have a flow rate varying from two to eight gallons per minute per square foot and may be either upflow or downflow carbon beds. Carbon may or
may not be regenerated on the wastewater treatment plant site;
(2) Aerated Lagoons. A basin in which all solids are maintained in suspension and by which biological oxidation or organic matter is reduced through artificially
accelerated transfer of oxygen on a flow-through basis;
(3) Aeration. A process of bringing about Intimate contact between air or high purity oxygen in a liquid by spraying, agitation or diffuslon;(3a) Extended
Aeration. An activated sludge process utilizing a minimum hydraulic detention time of 18 hours.
(4) Agriculturally managed she. Any site on which a crop Is produced. managed, and harvested (Crop includes grasses, grains, trees, etc.);
(5) Air Stripping. A process by which the ammonium ion is first converted to dissolved ammonia (pH adjustment) with the ammonia then released to the
atmosphere by physical means; or other similar processes which remove petroleum products such as benzene, toluene, and xylene;
(6) Carbon Regeneration. The regeneration of exhausted carbon by the use of a furnace to provide extremely high temperatures which volat
absorbed impurities;
(7) Carbonaceous Stage. A sV2ge of wastewater treatment designed to achieve 'secondary' effluent limits;
(8) Centrifuge. A mechanical device in which centrifugal force Is used to separate solids from liquids or to separate liquids of different densh
(9) Chemical Addition Systems- The addition of chemical(s) to wastewater at an application point for purposes of Improving solids removal, pH adjostment,
alkalinity control, etc.; the capability to experiment with different chemicals and different application points to achieve a specific result will be consid8".0ngQ
system; the capability to add chemical(s) to dual units will be rated as one system; capability to add a chemical at a different application points for diff_elan!' ® 1996
purposes will result in the systems being rated as separate systems;
(10) Chemical Sludge Conditioning. The addition of a chemical compound such as time. ferric chloride, or a polymer to wet sludge to coalss0s, mass prior to
its application to a dewatering device;
(11) Closed Cycle Systems. Use of holding ponds or holding tanks for containment of wastewater containing inorganic, non-toxic materials from TRjfrli_v�1t
crushed stone or other similar operations. Such systems shall carry a maximum of two points regardless of pumping facilities or ady other appurtenan�cees;8� E$
(12) Combined Removal of Carbonaceous BOD and Nitrogenous Removal by Nitrification- A single stage system required to achieve permit effluertAmits_on BOD
and ammonia nitrogen within the same biological reactor,
(13) Dechlorination. The partial or complete reduction of residual chlorine in a liquid by any chemical or physical process;
I. — 0.wwwww rk— ww....ww.tww wt wN.Mw wN.w..ww 4- ,.t,-wwww wow. ...
(1)
Post Aeration - cascade.............................................................................................................................0
diffusedor meth&Alcal.......:...............................................................................................
(m)
Reverse Osmosis........................................................................................................................................5
(n)
Sand or Mixed-Media Filters - low rate..........................................................................................................2
highrate......................................................................5
(o)
Treatment processes for removal of metal or cyanide...................................................................................15
(p)
treatment processes for removal of toxic materials other than metal or cyanide..............................................15
(7)
SLUDGETREATMENT
(a)
Sludge Digestion Tank - Heated (anaerobic)...............................................................................................10
Aerobic.............................................................................................................................................5
Unheated(anaerobic)................................................................................................................................3
(b)
Sludge Stabilization (chemical or thermal)...................................................................................................5
(c)
Sludge Drying Beds - Gravity......................................................................................................................2
VacuumAssisted......................................................................................................................................5
(d)
Sludge Elutriation.....................................................................................................................................5
(e)
(f )
Sludge Conditioner (chemical or thermal).....................................................................................................5
Sludge Thickener (gravity).........................................................................................................................
(g)
Dissolved Air Flotation Unit [not applicable to a unit rated as(3)(1)]..........................................................4V
(h)
Sludge Gas Utilization (including gas storage).............................................................................................
(1)
Sludge Holding Tank - Aerated....................................................................................................................5
Non-aerated ............................................................................................................................................. 2
(i)
(k)
Sludge Incinerator (not including activated carbon regeneration)..:.............................................................10
Vacuum Filter, Centrifuge. or Filter Press or other similar dewatering devices.................................................®
/10
(8)
RESIDUALS LITILIZATIOWDISPOSAL (inducting incinerated ash)
(a)
Lagoons..................................................................................................................................................2
(b)
Land Application (surface and subsurface) (see definition 22a)
by contracting to a land application operator or landfill operator who holds the land application permit
(c)
orlandfill permit.......................................................................................................................................Q
Dedicated Landflll(budai) by the permittee of the wastewater treatment facility..............................................5
(9)
DGWECTICN
(a)
Chlorination..............................................................................................................................................5
(b)
Dechlorination..........................................................................................................................................5
(c)
Ozone......................................................................................................................................................5
(d)
Radiation.................................................................................................................................................5
(10)
CHEMICAL ADDITION SYSTEM(S) (see definition No. 9) [not applicable to chemical additions rated as Rem (3)(j),
(5)(a)(xi),6)(a),
ListY
k6)(b), (7)(b), (7)(e), (9a), (9)(b) or (9)(c) 5 points each:
...............................................................................................................................5
v. . —...................................................................................................................................5
S
........................................................................................................................5
(11)
MISCELLANEOUS UNIT&PROCESSES
(a)
Holding Ponds, Holding Tanks or Settling Ponds for Organic or Toxic Materials Including wastes from mining
operations containing nitrogen or phosphorus compounds in amounts significantly greater than Is common
fordomestic wastewater...........................................................................................................................A
(b)
Effluent Flow Equalization (not applicable to storage basins which are inherent in land application systems).....2
(c)
(d)
Stage Discharge (not applicable to storage basins Inherent in land application systems) ..................................
Pumps...................................................................................................................................................
(6)
Stand-By Power Supply............................................................................................................................
(f)
Thermal Pollution Control Device.................................................................................................................3
TOTAL POINTS..........................................................................
y f
CLASSIFICATION
Class1...........................................................................................................5-25 Points
Class11.........................................................................................................26-50 Points
classin........................................................................................................51-65 Points
---------------------------------------------------------
ClassN.......................................................................................................66-Up Points
Facilities having a rating of one through four points, Inclusive, do not require a certified operator.
Facilities having an activated sludge process will be assigned a minimum classification of Class If.
Facilities having treatment processes for the removal of metal or cyanide will be assigned a minimum classification of Class II.
Facilities having treatment processes for the biological removal of phosphorus will be assigned a minimum classification of Class ill.
MU DEFINITIONS
The following definitions shall apply throughout this Subchapter.
(1) Activated Carbon Beds. A physicallchemical method for reducing soluble organic material from wastewater effluent; The column -type beds used in this
method will have a flow rate varying from two to eight gallons per minute per square foot and may be either upflow or downflow carbon beds. Carbon may or
may not be regenerated on the wastewater treatment plant site;
(2) Aerated Lagoons. A basin in which all solids are maintained in suspension and by which biological oxidation or organic matter is reduced through artificially
accelerated transfer of oxygen on a flow-through basis;
(3) Aeration. A process of bringing about Intimate contact between air or high purity oxygen in a liquid by spraying, agitation or diffuslon;(3a) Extended
Aeration. An activated sludge process utilizing a minimum hydraulic detention time of 18 hours.
(4) Agriculturally managed she. Any site on which a crop Is produced. managed, and harvested (Crop includes grasses, grains, trees, etc.);
(5) Air Stripping. A process by which the ammonium ion is first converted to dissolved ammonia (pH adjustment) with the ammonia then released to the
atmosphere by physical means; or other similar processes which remove petroleum products such as benzene, toluene, and xylene;
(6) Carbon Regeneration. The regeneration of exhausted carbon by the use of a furnace to provide extremely high temperatures which volat
absorbed impurities;
(7) Carbonaceous Stage. A sV2ge of wastewater treatment designed to achieve 'secondary' effluent limits;
(8) Centrifuge. A mechanical device in which centrifugal force Is used to separate solids from liquids or to separate liquids of different densh
(9) Chemical Addition Systems- The addition of chemical(s) to wastewater at an application point for purposes of Improving solids removal, pH adjostment,
alkalinity control, etc.; the capability to experiment with different chemicals and different application points to achieve a specific result will be consid8".0ngQ
system; the capability to add chemical(s) to dual units will be rated as one system; capability to add a chemical at a different application points for diff_elan!' ® 1996
purposes will result in the systems being rated as separate systems;
(10) Chemical Sludge Conditioning. The addition of a chemical compound such as time. ferric chloride, or a polymer to wet sludge to coalss0s, mass prior to
its application to a dewatering device;
(11) Closed Cycle Systems. Use of holding ponds or holding tanks for containment of wastewater containing inorganic, non-toxic materials from TRjfrli_v�1t
crushed stone or other similar operations. Such systems shall carry a maximum of two points regardless of pumping facilities or ady other appurtenan�cees;8� E$
(12) Combined Removal of Carbonaceous BOD and Nitrogenous Removal by Nitrification- A single stage system required to achieve permit effluertAmits_on BOD
and ammonia nitrogen within the same biological reactor,
(13) Dechlorination. The partial or complete reduction of residual chlorine in a liquid by any chemical or physical process;
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(15) Electrodialysis. Process for removing Ionized salts from water through the use of Ion -selective ion -exchange membranes;
(16) Filter Press. A process operated mechanically for partially dewatering sludge;
(17) Foam Separation. The planned frothing of wastewater or wastewater effluent as a means of removing excessive amounts of detergent materials through
the introduction of air in the form of fine bubbles; also called foam fractionation;
(18) Grit Removal. The process of removing grk anis other heavy mineral matter from wastewater;
(19) Imhoff Tank. A deep two story wastewater tank consisting of an upper sedimentation chamber and a lower sludge digestion chamber.
(20) Instrumented Flow Measurement. A device which Indicates and records rate of flow;
(21) ion Exchange. A chemical process in which Ions from two different molecules are exchanged;
(22) Land application:
(a) Sludge Disposal. A final sludge disposal method by which wet sludge may be applied to land either by spraying on the surface or by subsurface injection
(i.e., chisel plow); (not applicable for types of sludge described In (11) of this Rule);
(b) Treated Effluent. The process of spraying treated wastewater onto a land area or other methods of application of wastewater onto a land area as a
means of final disposal or treatment;
(23) Microscreem A low speed, continuously back -washed, rotating drum filter operating under gravity conditions as a polishing method for removing
suspended solids from effluent;
(24) Nitrification Process. The biochemical conversion of unoxidized nitrogen (ammonia and organic nitrogen) to oxidized nitrogen (usually nitrate);
(25) Nitrogenous Stage. A separate stage of wastewater treatment designed for the specific purpose of converting ammonia nitrogen to nitrate nitrogen;
(26) Phosphate Removal, Biological. The removal of phosphorus from wastewater by an oxIctanoxic process designed to enhance luxury uptake of phosphorus
by the microorganisms;
(27) Polishing Pond. A holding pond following secondary treatment with sufficient detention time to allow settling of finely suspended solids;
(28) Post Aeration Aeration following conventional secondary treatment units to Increase effluent D.O. or for any other purpose;
(29) Post Aeration. (Cascade) A polishing method by which dissolved oxygen Is added to the effluent by a nonmechanical, gravity means of flowing down a
Serle$ of steps or weirs, The flow occurring across the steps or weirs moves in a fairly thin layer and the operation of the cascade requires no operator
adjustment; thus, zero points are assigned even though this is an essential step to meeting the limits of the discharge permit;
(30) Powdered to Granular Activated Carbon Feed. A biophysical carbon process that utilizes biological activity and organic absorption by using powdered or
granular activated carbon; Virgin or regenerated carbon is feed controlled Into the system;
(31) Preasration. A tank constructed to provide aeration prior to primary treatment;
(32) Preliminary Units. Unit operations in the treatment process, such as screening and comminution, that prepare the liquor for subsequent major operations;
(33) Industrial Pretreatment.
(a) Pre-treatment Unit, Industrial. The conditioning of a waste at its source before discharge, to remove or to neutralize substances injurious to sewers and
treatment processes or to effect a partial reduction in load on the treatment process which is operated by the same governing body as the wastewater
treatment plant being rated;
b) Pre-treatment Program, Industrial - must be a State or EPA required program to receive points on the rating sheet;
(34) Primary Clarifiers. The first settling tanks through which wastewater is passed in a treatment works for th
solids and BOD which is associated with the solids; e purpose of removing settleable and suspended
(35) Pumps. All influent, effluent and in -plant pumps;
(36) Radiation. Disinfection or sterilization process utilizing devices emitting ultraviolet or gamma rays;
(37) Reverse Osmosis. A treatment process in which a heavy contaminated liquid is pressurized through a membrane loaning nearly pure liquid Iree from
suspended solids;
(38) Rotating Biological Contractors. A fixed biological growth process in which wastewater flows through tanks in which a series of partially submerged circular
surfaces are rotated;
(39) Sand Filters:
(a) Intermittent Biological. Filtration of effluent following septic tanks, lagoons, or some other treatment process in which further biodecomposition Is
expected to produce desired effluents; Hydraulic loading rates on these filters are computed In gpd/ac and have a resulting low gpndsf (less than one);
b) Recirculating biological - the same type of sand filter as defined in Subparagraph (39) (a) of this Rule with the added capability to recycle effluent back
through the sand filter,
(40) Sand or Mixed -Media Filters. A polishing process by which effluent limits are achieved through a further reduction of suspended solids;
(a) low rate — gravity, hydraulically loaded filter with loading rates in the one to three gprr✓sf range;
(b) high rate — a pressure, hydraulically loaded filter with loading rates in the five gprn/si range, At any rate, the loading rate will exceed three gprNsf;
(41) Secondary Clarifiers. A tank which follows the biological unit of treatment plant and which has the purpose of removing sludges associated with the
biological treatment units;
(42) Separate Sludge Reaeration. A part of the contact stabilization process where the activated sludge Is transferred to a tank and aerated before retumlrg it
to the contact basin;
(43) Septic Tank. A single -story settling tank in which settled sludge is in contact with the wastewater flowing through the tank: shad not be applicable for
septic tank systems serving single family residences having capacity of 2,000 gallons or less which discharge to a nitrification field;
(44) Sludge Digestion. The process by which organic or volatile matter and sludge is gasified. liquefied, mineralized or converted into more stable organic matter
through the activity of living organisms, which includes aerated holding tanks;
(45) Sludge Drying Beds. An area comprising natural or artificial layers of porous materials upon which digested sewage sludge is dried by drainage and
evaporation;
(46) Sludge Elutriation. A process of sludge conditioning in which certain constituents are removed by successive washings with fresh water or plant effluent;
(47) Sludge Gas Utilization. The process of using sewage gas for the purpose of heating buildings, driving engiries, etc.;
(48) Sludge Holding Tank (Aerated and Nonaerated). A tank utilized for small wastewater treatment plants not containing a digester in which sludge may be
kept fresh, and supernatant withdrawn prior to a drying method (Le. sludge drying beds); This may bedone by adding a small amount of air simply to keep the
sludge fresh, but not necessarily an amount that would be required to achieve stabilization of organic matter. A nonaerated tank would simply be used to
decant sludge prior to dewatering and would not allow long periods (several days of detention) without resulting odor problems;
(49) Sludge Incinerators. A furnace designed to bum sludge and to remove all moisture and combustible materials and reduce the sludge to a sterile ash;
(50) Sludge Stabilization (Chemical or Thermal). A process to make treated sludge less odorous and putrescble, and to reduce the pathogenic organism
content; This may be done by pH adjustment, chlorine dosing, or by heat treatment;
(51) Sludge Thickener. A type of sedimentation tank in which the sludge 1s permitted to settle and thicken through agitation and gravity;
(52) Stabilization Lagoon. A type of oxidation lagoon in which biological oxidation of organic matter Is effected by natural transfer of oxygen to the water from
air (not a polishing pond
(53) Stand -By Power Supply. On she or portable electrical generating equipment;
(54) Static Screens. A stationary screen designed to remove solids, including nombiodegradabie particulate (floatabie solids, suspended solids and BOO
reduction) from municipal and industrial wastewater treatmerk systems;
(55) Tertiary Treatment. A stage of treatment following secondary which is primarily for the purpose of effluent polishing; A settling lagoon or sand or coal biter
might be employed for this purpose;
(56) Thermal Pollution Control Device. A device providing for the transfer of heat from a fluid flowing In tubes to another fluid outside the tubes, or vice versa;
or other means of regulating liquid temperatures;
(57) Thermal Sludge Conditioner. A conditioning process by which heat is added for a protracted period of time to impId
e dewaterabli ty of sludge by the
solubilizing and hydraulizing of the smaller and more highly hydrated sludge particles;
(58) Toxic Materials. Those wastes or combinations of wastes. Including disease -causing agents which after discharge tion
or assimilation Into any organism, either directly from the environment or indirectly by ingestion through food chains, will
abnormalities, cancer, genetic mutations, physiological malfunctions (including malfunctions in reproduction) or physical ns, In such orgy heir
offspring; Toxic materials Include, by way of illustration and not limkatlon: lead, cadmium, chromium, mercury, vanadium,,zinc, Ortho nitro -chic ne
(ONCE), polychlorinated biphenyls (PCBs) and dichlorodiphenyl trichloroethane (DDT); and any other materials that have or ma er tertnin e
toxic properties; V �+p�ft w V r 6
(59) Trickling Filter. A biological treatment unit consisting of a material such as broken stone or rock over which wastewater Is distributed; A ht's PMIS trickling
filter is one which operated at between 10 and 30 mgd per acre. A low rate trickling filter Is one which is designed to operate at one to four mgd per acre;
(60) Trickling Filter (Packed Tower). A plug flow type of operation in which wastewater flows down through successive lays r fjkrata ,mat i; Organic
material Is removed continually by the active biological fixed growth In each successive layer. This method may produce "so �flpsj�tr a br
adapted to produce a nitrified effluent; y
(61) Vacuum Filter, Centrifuges, or Filter Presses. Devices which are designed to remove excess water from either ested or undigested slu a prior to disposal
or further treatment. SUG ge dg p isp

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State of North Carolina ,
Department of Environment,
Health and Natural Resources
Division of Environmental Management
James B. Hunt, Jr., Governor
Jonathan B. Howes, Secretary
A. Preston Howard, Jr., P.E., Director
DL> ?E/"'T
�EHNF�
November 10, 1993
Mr. Michael E. Mayberry, Plant Manager
E.I. Dupont de Nemours & Company, Inc.
P.O. Drawer Z
Fayetteville, NC 28302
Subject: NPDES Permit # NC0003573
E.I. Dupont de Nemours & Company, Inc.
Fayetteville Works
Bladen County
Dear Mr. Mayberry:
In accordance with your application for discharge permit received on November 29, 1990; we are
forwarding herewith the subject State - NPDES permit. This permit is issued pursuant to the
requirements of North Carolina General Statute 143-215.1 and the Memorandum of Agreement
between North Carolina and the US Environmental Protection Agency dated December 6, 1983.
In response to comments raised at a meeting between DuPont representatives and Division staff on
September 21, 1993, regarding your draft permit, the following modifications have been made:
General -
• The map showing the location of the discharge point has been corrected.
-The expiration date of May 31, 1996 is based on the basinwide permitting strategy for the
Cape Fear River basin. All facilities are being given permits with terms consistent with this
strategy. A number of facilites have received permits with expiration in less than two years.
Subsequent permit terms will befive years.
• As discussed in our meeting, the stormwater component of the discharge is being addressed
in a separate permit. Subsequent permitting actions, in 1996, will consolidate all sources
under one permit.
Outfall 001-
• Oil and grease monitoring is required due to detection in the annual pollutant analysis. The
monitoring frequency has been changed from 3/week to monthly to be consistent for this type
of discharge. After 12 months of monitoring data has been collected, you may request that the
Division reevaluate the monitoring requirement.
• OCPSF parameters - Since DuPont has sampled for these parameters over Y .,
without detection, the monitoring frequency has been reduced from quarterl
footnote statement has been added to the OCPSF table addressing changes i nitoring
frequency if parameters are detected in the future. JUL 30
1996
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/ 10% post -consumer TRAL FILES

• Polynuclear Aromatic Hydrocarbons (PAHs) - The limit has been corrected to a daily
maximum of 57.0 µg/l. This value is based on an average stream flow of 5676 cfs.
• Fluoride limit - The daily maximum limit has been changed from 44.0 mg/1 to
5000.0 lbs/day as DuPont requested.
• Toxicity test location and concentration - The location of the test will remain the same as in
the current permit (downstream of the confluence of outfalls 001 and 002). The test
concentration will also remain the same (3.3%).
• Turbidity limits and monitoring have been deleted since the filter backwash portion of the
discharge is minimal.
If any parts, measurement frequencies or sampling requirements contained in this permit are
unacceptable to you, you have the right to an adjudicative hearing upon written request within thirty
(30) days following receipt of this letter. This request must be in the form of a written petition,
conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office of
Administrative Hearings, Post Office Drawer 27447, Raleigh, North Carolina 27611 -7447.
Unless such demand is made, this decision shall be final and binding.
Please take notice this permit is not transferable. Part II, EA. addresses the requirements to be
followed in case of change in ownership or control of this discharge.
This permit does not affect the legal requirements to obtain other permits which may be required by
the Division of Environmental Management or permits required by the Division of Land Resources,
Coastal Area Management Act or any other Federal or Local governmental permit that may be
required.
If you have any questions concerning this permit, please contact Mr. Greg Nizich at telephone
number 919/733-5083.
cc: Mr. Jim Patrick, EPA
Fayetteville Regional Office
Compliance
Central Files
Sincerely,
Original Signed By
Coleen H. Sullins
A. Preston Howard, Jr., P.E.
rMq
JUL V-1 ?0qA
CEN't i. FILES

Permit No. NC0003573
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT, HEALTH, AND NATURAL RESOURCES
DIVISION OF ENVIRONMENTAL MANAGEMENT
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
In compliance with the provision 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., Inc.
is hereby authorized to discharge wastewater from a facility located at
Fayetteville Works
NC Highway 87
Duart .
Bladen County
to receiving waters designated as 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, and III hereof.
This permit shall become effective December 1, 1993
This permit and the authorization to discharge shall expire at midnight on May 31, 1996
Signed this day November 12, 1993
Original Signed By
Coleen H. Sullins
A. Preston Howard, Jr., P.E., Director
Division of Environmental Management
By Authority of the Environmental Management Commission
JUL 30 }
CZNTFY , Mft
4

Permit No. NC0003573
SUPPLEMENT TO PERMIT COVER SHEET
E.I. DuPont de Nemours & Co., Inc.
is hereby authorized to:
1. Continue to operate existing wastewater treatment facilities consisting of neutralizaion,
equalization, a nutrient feed sytstem, a sludge aeration basin, an aeration tank, clarification,
disinfection facilities, a sludge filter press (001), boiler blowdown, once through cooling water,
and filter backwash discharge (002) located at Fayetteville Works, NC Highway 87, Duart,
Bladen County (See Part III of this Permit), and
2, Discharge from said treatment works at the location specified on the attached map into Cape Fear
River which is classified Class C waters in the Cape Fear River Basin.
h
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CENTRAL FILE$

EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS FINAL NC0003573
During the period beginning on the effective date of the permit and lasting until expiration, the
Permittee is authorized to discharge from outfall serial number 001. Such discharges shall be limited
and monitored by the Permittee as specified below:
Effluent Characteristics
Mon. Avg.
Daily Max.
Measurement
Sample
*Sample
lbs/day
lbs/day
Frequency 1
Type
Location
Acenaphthene
0.16
0.43
Annually
Grab
E
Acrylonitrile
0.70
1.77
Annually
Grab
E
Benzene
0.27
0.99
Annually
Grab
E
Carbon Tetrachloride
0.13
0.28
Annually
Grab
E
Chlorobenzene
0.11
0.20
Annually
Grab
E
1,2,4-Trichlorobenzene
0.50
1.02
Annually
Grab
E
Hexachlorobenzene
0.11
0.20
Annually
Grab
E
1,2-Dichloroethane
0.50
1.54
Annually
Grab
E
1,1,1 -Trichloroethane
0.15
0.39
Annually
Grab
E
Hexachloroethane
0.15
0.39
Annually
Grab
E
1,1-Dichloroethane
0.16
0.43
Annually
Grab
E
1,1,2 -Trichloroethane
0.15
0.39
Annually
Grab
E
Chloroethane
0.76
1.96
Annually
Grab
E
Chloroform
0.15
0.34
Annually
Grab
E
2 -Chlorophenol
0.23
0.72
Annually
Grab
E
1,2 -Dichlorobenzene
0.56
1.19
Annually
Grab
E
1,3 -Dichlorobenzene
0.23
0.32
Annually
Grab
E
1,4 -Dichlorobenzene
0.11
0.20
Annually
Grab
E
1,1-Dichloroethylene
0.12
0.18
Annually
Grab
E
1,2-trans-Dichloroethylene
0.15
0.39
Annually
Grab
E
2,4-Dichlorophenol
0.29
0.82
Annually
Grab
E
1,2-Dichloropropane
1.12
1.68
Annually
Grab
E
1,3-Dichloropropylene
0.21
0.32
Annually
Grab
E
2,4 -Dimethylphenol
0.13
0.26
Annually
Grab
E
2,4-Dinitrotoluene
0.83
2.08
Annually
Grab
E
2,6-Dinitrotoluene
1.86
4.68
Annually
Grab
E
Ethylbenzene
0.23
0.79
Annually
Grab
E
Fluoranthene
0.18
0.50
Annually
Grab
E
Methylene Chloride
0.29
0.65
Annually
Grab
E
Methyl Chloride
0.63
1.39
Annually
Grab
E
Hexachlorobutadiene
0.15
0.36
Annually
Grab
E
Naphthalene
0.16
0.43
Annually
Grab
E
Nitrobenzene
0.20
0.50
Annually
Grab
E
2-Nitrophenol
0.30
0.50
Annually
Grab
E
4-Nitrophenol
0.53
0.91
Annually
Grab
E
2,4-Dinitrophenol
0.52
0.90
Annually
Grab
E
4,6-Dinitro-o-cresol
0.57
2.02
Annually
Grab
E
Phenol
0.11
0.19
Annually
Grab
E
Bis(2-ethylhexyl)phthalate
0.75
2.04
,Annually
Grab
E
Di -n -butyl phthalate
0.20
0.42
Annually
Grab
E
Diethyl phthalate
0.59
1.48
Annually
Grab
- E
Dimethyl phthalate
0.14
0.34
Annually
Grab
E `
' ' 1996

(continued)
Effluent Characteristics
Mon. Avg.
Daily Max.
Measurement
Sample
*Sample
lbs/day
lbs/day
Frequency l
Type
Location
Benzo(a)anthracene**
0.16
0.43
Annually
Grab
E
Benzo(a)pyrene**
0.17
0.45
Annually
Grab
E
3,4-Benzofluoranthene**
0.17
0.45
Annually
Grab
E
Benzo(k)fluoranthene**
0.16
0.43
Annually
Grab
E
Chrysene**
0.16
0.43
Annually
Grab
E
Acenaphthylene
0.16
0.43
Annually
Grab
E
Anthracene
0.16
0.43
Annually
Grab
E
Fluorene
0.16
0.43
Annually
Grab
E
Phenanthrene
0.16
0.43
Annually
Grab
E
Pyrene .
0.18
0.49
Annually
Grab
E
Tetrachloroethylene
0.16
0.41
Annually
Grab
E
Toluene
0.19
0.58
Annually
Grab
E
Trichloroethylene
0.15
0.39
Annually
Grab
E
Vinyl Chloride
0.76
1.96
Annually
Grab
E
Total PAH's (ng/l)**
***
Annually
Grab
E
* Sample Location: E -Effluent
** Total PAH's are comprised of Benzo(a)anthracene; Benzo(a)pyrene; 3,4-Benzofluoranthene;
Benzo(k)fluoranthene; Chrysene, Dibenz (a,h) anthracene and Indeno (1,2,3 - ed) pyrene.
*** The daily maximum concentration shall not exceed 57.0 µg/l.
1Should any annual monitoring result in detection of any OCPSF parameters contained in 40 CFR
414 Subpart I (excluding metals), then quarterly monitoring will begin immediately for the detected
parameter(s). After four consecutive quarterly samples resulting in non -detection are achieved, the
monitoring frequency will revert to annually.
JUL4
CEM -RAL FILES

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S{,�r;n� B. Schta alt of imri�
1 The pennittet s1121I comply with Fina] Effluent Limitations spedfied for discharges in
a:ucrdance %iib the follov ing scbedule:
Pe-rirz sh2m comply with Final EMUtnt Limitations by the effective daze of the parfait Ualess
spe.-ified below.
Z. Fcrmirte= shall st all rimes provide the operarion and maintenance necessary to operate the
existing faHLties at optimtun e>'xtnq.
JUL t
3. NO later than 34 caJendar d.ays following a date identified in the above schedule of con r 6
the permittee shaJl submit either a report of progress or, in the case of specific actions being
requued by identified dates, a %47inen notice of compliance or noncompliance. In the latter
case, the nonce shall include the cause of noncomplianct, any remedial actions taken, 2nd tht
probability of meeting the next schedule requirements.

Part III Permit No. NC0003573
E. This permit shall be modified, or revoked and reissued to incorporate 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.
F. The permittee shall not use any biocides 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 Environmental Management. Such
notification shall include completion of Biocide Worksheet Form 101 and a map locating the
discharge point and receiving stream.
G. CHRONIC TOXICITY PASS/FAIL PERMIT LIMIT (QRTRLY)
The effluent discharge shall at no time exhibit chronic toxicity using test procedures outlined in:
1.) The North Carolina Ceriodaphnia chronic effluent bioassay procedure (North Carolina Chronic
Bioassay Procedure - Revised *September 1989) or subsequent versions.
The effluent concentration at which there may be no observable inhibition of reproduction or
significant mortality is 3.3% (defined as treatment two in the North Carolina procedure document).
The permit holder shall perform quarterly monitoring using this procedure to establish compliance
with the permit condition. The first test will be performed after thirty days from the effective date
of this permit 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.
All toxicity testing results required as part of this permit condition will be entered on the Effluent
Discharge Monitoring Form (MR -1) for the month in which it was performed, using the parameter
code TGP3B. Additionally, DEM Form AT -1 (original) is to be sent to the following address:
Attention:
Environmental Sciences Branch
North Carolina Division of
Environmental Management
4401 Reedy Creek Road
Raleigh, N.C. 27607
Test data shall be complete and accurate and include all supporting chemical/physical measurements
performed in association with the toxicity tests, as well as all dose/response data. Total residual
chlorine of the effluent toxicity sample must be measured and reported if chlorine is employed for
disinfection of the waste stream.
Should any single quarterly monitoring indicate a failure to meet specified limits, then monthly
monitoring will begin immediately until such time that a single test is passed. Upon passing, this
monthly test requirement will revert to quarterly in the monihs specified above. h
Should any test data from this monitoring requirement or tests performed b
Division of Environmental Management indicate potential impacts to the r ing strea ,
permit may be re -opened and modified to include alternate monitoring requirements 9111ir*
1996
NOTE: Failure to achieve test conditions as specified in the cited document ch as minimum

control organism survival and appropriate environmental controls, shall constitute -an invalid test
and will require immediate retesting(within 30 &ys of initial monitoring event). Failure to submit
suitable test results will constitute noncompliance with monitoring requirements.
H. The permittee may submit data one year after permit issuance to the Division of Environmental
Management requesting the Division to re-evaluate the monitoring frequencies for certain
parameters in this permit.
6
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TABLE 1
Outfall 001 Flow Data: January 92 - April 96
CENTRAL FILES ;�
Avg Flow
Max Flow
MonthNear
(MGD)
(MGD)
Jan -92
0.759
0.943
Feb -92
0.762
0.877
Mar -92
0.871
1.150
Apr -92
0.936
1.410
May -92
0.660
0.993
Jun -92
0.789
1.032
Jul -92
0.617
0.886
Aug -92
0.803
1.015
Sep -92
0.675
0.878
Oct -92
0.746
0.939
Nov -92
0.714
1.141
Dec -92
0.748
0.936
Jan -93
0.731
0.857
Feb -93
0.741
0.955
Mar -93
0.698
0.907
Apr -93
0.799
0.975
May -93
0.816
1.008
Jun -93
0.827
1.018
Jul -93
0.836
0.985
Aug -93
0.756
1.605
Sep -93
0.832
1.027
Oct -93
0.786
1.300
Nov -93
0.817
0.981
Dec -93
0.811
1.105
Jan -94
0.896
1.472
Feb -94
0.938
1.116
Mar -94
0.940
1.540
Apr -94
1.028
1.255
May -94
0.989
1.218
Jun -94
0.905
1.330
Jul -94
0.947
1.179
Aug -94
1.004
1.133
Sep -94
0.984
1.141
Oct -94
0.858
1.169
Nov -94
0.952
1.228
Dec -94
0.989
1.793
CENTRAL FILES ;�

TABLE 1
Outfall 001 Flow Data: January 92 - April 96
January 92 - June 95
Average (MGD) 0.853
Maximum Average (MGD) 1.054
Daily Maximum (MGD) 1.793
May 94 - Apr 96 ,
Average (MGD) 0.929
Maximum Average (MGD) 1.054
Daily Maximum (MGD)
Avg Flow
Max Flow
MonthNear
(MGD)
(MGD)
Jan -95
0.954
1.075
Feb -95
1.054
1.172
Mar -95
1.049
1.162
Apr -95
1.006
1.160
May -95
0.875
1.678
Jun -95
0.934
1.160
Jul -95
0.845
1.083
Aug -95
0.795
1.044
Sep -95
0.873
1.113
Oct -95
0.950
1.435
Nov -95
0.793
0.994
Dec -95
0.746
0.915
Jan -96
0.928
1.240
Feb -96
0.902
1.218
Mar -96
0.954
1.163
Apr -96
1.006
1.156
January 92 - June 95
Average (MGD) 0.853
Maximum Average (MGD) 1.054
Daily Maximum (MGD) 1.793
May 94 - Apr 96 ,
Average (MGD) 0.929
Maximum Average (MGD) 1.054
Daily Maximum (MGD)

TABLE 2
Sorted Outfall 001 Flow Data: May 95 - April 96
CENTRAL FILES
Avg Flow
Max Flow
Percentile
MonthNear
(MGD)
(MGD)
(%)
Apr -96
1.006
1.156
100.0%
Mar -96
0.954
1.163
91.7%
Oct -95
0.950
1.435
83.3%
Jun -95
0.934
1.160
75.0%
Jan -96
0.928
1.240
66.7%
Feb -96
0.902
1.218
58.3%
May -95
0.875
1.678
50.0%
Sep -95
0.873
1.113
41.7%
Jul -95
0.845
1.083
33.3%
Aug -95
0.795
1.044
25.0%
Nov -95
0.793
0.994
16.7%
Dec -95
0.746
0.915
8.3%
CENTRAL FILES

TABLE 3
Sorted Outfall 001 Flow Data: May 94 - April 96
Pi
•r
JUL 30 1996
CENTRAL FILES
Avg Flow
Max Flow
Percentile
MonthNear
(MGD)
(MGD)
(%)
Feb -95
1.054
1.172
100.0%
Mar -95
1.049
1.162
95.8%
Apr -95
1.006
1.160
91.7%
Apr -96
1.006
1.156
87.5%
Aug -94
1.004
1.133
83.3%
May -94
0.989
1.218
79.2%
Dec -94
0.989
1.793
75.0%
Sep -94
0.984
1.141
70.8%
Jan -95
0.954
1.075
66.7%
Mar -96
0.954
1.163
62.5%
Nov -94
0.952
1.228
58.3%
Oct -95
0.950
1.435
54.2%
Jul -94
0.947
1.179
50.0%
Jun -95
0.934
1.160
45.8%
Jan -96
0.928
1.240
41.7%
Jun -94
0.905
1.330
37.5%
Feb -96
0.902
1.218
33.3%
May -95
0.875
1.678
29.2%
Sep -95
0.873
1.113
25.0%
Oct -94
0.858
1.169
20.8%
Jul -95
0.845
1.083
16.7%
Aug -95
0.795
1.044
12.5%
Nov -95
0.793
0.994
8.3%
Dec -95
0.746
0.915
4.2%
Pi
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JUL 30 1996
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DIVISION OF ENVIRONMENTAL MANAGEMENT
April 15, 1996
To: Greg Nizich
Through: Matt Matthews Alf"`
From: Melissa Rosebrock Com`
Subject: E.I. Dupont - Fayetteville
Use of Water Treatment/Biocide Products
NPDES No. NC0003573 (002)
Bladen County
E.I. Dupont - Fayetteville has submitted the following chemicals for approval: 1.) Bio-Trol 88P;
2.) Cor-Trol 778P; 3.) Balanced Polymer 54401; 4.) Opti-Meen; 5.) Continuum 41623; and 6.) Polymer
CDP -41788. Material Safety Data Sheets (MSDS), memos, and Biocide/Chemical Treatment rn
Worksheets - Form 101 have been reviewed and evaluated by Aquatic Toxicology Group staff. n
Data submitted by E.I. Dupont concerning the dosage rate of Bio -Trot 88P, system volume, average'_
daily discharge, toxicity of the active ingredient and/or breakdown products, and minimum stream flow
have also been reviewed and evaluated. Calculations summarized on the accompanying worksheet
predict that the use of Bio-Trol 88 at the stated dosage rate and discharge conditions will not result in
toxic impact to aquatic life in the receiving stream. Therefore, the use of this product as a biocide at E.I4;'
Dupont - Fayetteville is deemed acceptable.
00
Compounds 2-6 do not appear to be, nor are they labeled as biocidal compounds and would
thus not require individual review and approval using the standard biocide review process. Since many
additives can affect the effluent pH, the discharge at this facility should be monitored. We performed the
attached calculations for Polymer CDP -41788 as if it were a biocide to address concerns we had
regarding toxicity of the active ingredient (aluminum sulfate). Calculations summarized on the
accompanying worksheet predict that the use of Polymer CDP -41788 at the stated dosage rate and
discharge conditions will not result in toxic impact to aquatic life in the receiving stream. Following
current permitting practices, the use of these compounds 2-6 should be allowable at E.I. Dupont -
Fayetteville.
Please contact me at [phone] if you have questions regarding this review.
attachments
cc: Michael Wicker FRO
Central files JUL g® 1996
,..
CENTpAL FILES

Page 1
DvPo�T -! NCOOD6673
Note for Greg Nizich
From: Dave Goodrich
Date: Mon, Apr 8, 1996 8:41 AM
Subject: RE: DuPont F'ville - Nafion routing
To: Greg Nizich
Yup. I think you've got it. Giddy -up!
From: Greg Nizich on Mon, Apr 8, 1996 8:16 AM
Subject: DuPont F'ville - Nafion routing
To: Dave Goodrich
They are planning to reroute the Nafion stream around the plant and have it rejoin the WWTP
effluent before it connects with 002 (the fabulous woodlined ditch). Since the eff. guidelines
have different limits for the 64 OCPSF parameters without end -of -pipe treatment, does that
mean I need to set-up another outfall on the effluent sheet? I think this also means I will have
two different eff. sheets for 001 (WWTP) - with and without Nafion. Does that make sense?
CENTRAL FILES

*****************************************************************
*****************************************************************
DIVISION OF ENVIRONMENTAL MANAGEMENT
FAYETTEVILLE REGIONAL OFFICE
April 17, 1996
*****************************************************************
MEMORANDU M
TO GREG NIZICH, PERMITS AND ENGINEERING
FROM Michael C. Wicker, P.E.
Regional Water Quality Supervisor
SUBJECT E. I. DUPONT :.:.
NPDES PERMIT NO. NC0003573
BLADEN COUNTY
This office has reviewed the request of DuPont to bypass the WWTP
with the Nafion HFPO Process Scrubber and Waste Gas Scrubber
discharges to the wood -lined ditch at the Fayetteville Works site.
The data submitted indicates no appreciable pollutants of concern;
however this office concurs that a separate outfall should be
established for toxicity and OCPSF monitoring as is currently done
on the WWTP discharge.
Should any toxicity test fail or OCPSF value show exceedence then
increased monitoring and a re-evaluation of the constituents of the
discharge should be required as a permit condition.
If you have any questions about this matter please contact me at
[phone].
MCW:mcw:dupont Jul SU
1996 F
CENTRAL FILES
mow. t
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9E FEMOc-C FOP, DuPo�T- �AYF,TTC—VI LLE NG0Cb3G73
• Page 1
From:
Date:
Subject:
To:
Note for Greg Nizich
Dianne Williams Wilburn
Mon, Oct 17,1994 11:37 AM
FW: Reusing an old outfall number
Greg Nizich
Hey! See Sandra's response below! Let's not use an old outfall number!
From: Sandra Gillaspie on Mon, Oct 17, 1994 8:33 AM
Subject: RE: Reusing an old outfall number
To: Dianne Williams Wilburn
You're right. If the old outfall number is used we would loose the historical data. For
example: If the outfall was made inactive in 91 and the made active in 94 with a new
wastestream it would look as though the old data was going into the new wastestream.
From: Dianne Williams Wilburn on Mon, Oct 17, 1994 8:18 AM
Subject: FW: Reusing an old outfall number
To: Sandra Gillaspie
See Greg]s question. I wouldn't think we would want to use the same number. What do you
think?
From: Greg Nizich on Mon, Oct 17, 1994 7:47 AM
Subject: Reusing an old outfall number
To: Dianne Williams Wilburn
Do we have a policy on using a discontinued outfall number? This is for ALCOA. The new
wastestream is not the same wastestream that was previously dropped from the permit.
CENTRAL FILES

JAN 10 '96 11:29
615 P02
ENVIRONMENTAL 1•ROTECYION AGENCY OAT& OF M109CTION
REPORT ON OPERATION AND MAINTENANCE
OF WASTEWATER TREATMENT PLANT
A. GENERAL IN091 MA N
i. PLANT
a.) NAME
VM46
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4 cry
1. TYPE Of PLANT
S_ PROJECT NO.
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E. i1GN ProyLAt10N
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i. COLLECTION SYSTEM
7. DATE PRESENT PLANT BEGAN OPERATING
1 127'o / 'U
B. STATE PERMIT NO,
NC.D 000-5517-j
COM OI NEt? SSV;!-"CSOTN
I. IN TME SPACE PROVIDED BELOW. FURN154 A SI LI f FI,OW DIA31jM4 00 A WRITTItH DCSCATION OF THC PLANT UNITS IN
FLOW SEQUENCE.
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10. IDENTIFY RECEIVING MATERS
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11. IDENTIFY PERTINENT STREAM STANDAROS ANI). OR USES OF TWE RRC&IViNG WATERS
12. GIVE TWE EFF4UENT STANDARDS AMD; Op REOUIREMENTS $0Oft STATIC OPERATING PERMIT
S. cueleeNt PLANT Lo Na
1, ANNUAL AVG DAILY FLOW PATE (mRd)
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6. PRINCIPAL TVPES OF tNOUSTRfAL WASTE DISCWARp*O To
7. OO 44 t N EQUIVALCNT opow IFW 1 Dui RIAL WASTES
MUNICIPAL SYSTEM
S. O UL I N EQUIVALENT -418S) OF INDUS I L
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11D. INFILTRATION PROBLEMS -
JUL 30 1996
CENTRAL FILES

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AVERAGE FLOWS IN TH WEIS OF GALLONS PER GAY.
SOX FLOWS ARE ESTIMATED TO GIVE IMARE AND
OTSDIAROE TOTALS.
SCHEMATIC WATER FLOW
E.I. DU PONT OE NEMOURS & CO.
FAYETTEVILLE WORKS JUL 30 1996
PAGE I OF 2 ENT RAL
CFILES

m WFFAWNT
SCHEMATIC WATER FLOW
PROCESS USES
E.I.OU PONT DE NEMOURS & CO.
FAYETTEVILLE WORKS
PAGE 2 OF 2
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31JL 30 1996
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DIVISION OF ENVIRONMENTAL MANAGEMENT
March 8, 1996
MEMORANDUM
To: Michael Wicker
Fayetteville Regional Office
From: Greg Nizich `�O
NPDES Permits Group
Subject: DuPont Automotive
NPDES Permit No. NC0003573
Bladen County
A letter from Mike Johnson is enclosed questioning the rating of their wastewater
treatment facility as a Class IV plant. Let me know if you agree with their interpretation
of the classification definitions.
Attachment
JUL
80 1996 i
i
CENTRAL FILES

Ji
DuPont Automotive
P.O. Drawer Z
Fayetteville, NC 28302
M
DuPont Automotive
March 4, 1996
Mr. Gregory Nizich
NC DEHNR - DEM w
o, r
Water Quality Section
Permits & Engineering Unit
P. O. Box 29535
Raleigh, NC 27626-0535 rn
RE: NPDES Permit No. NC0003573
Reclassification of DuPont -Fayetteville Wastewater Treatment Facility 0
Dear Mr. Nizich,
A letter dated February 26, 1996, from Mr. Michael Wicker (DEHNR-Fayetteville Regional
Office) states that this site's Wastewater Treatment Plant (WWTP) will be reclassified from a
Class III to a Class IV facility upon the renewal of the referenced NPDES Permit.
In reviewing the points allocated to the WWTP in determining this reclassification, I believe two
items totaling four points were incorrectly included. Without these four points, the facility
assessment would total 65 points, and the WWTP would remain a Class III facility.
After you have reviewed this letter, please call me so that we can discuss this issue. Assuming
that you agree with my following assessment, we could then discuss what steps would be needed
to reverse this reclassification.
PRE -DIGESTER TANK
The Pre -Digester Tank is a 250,000 gallon above -ground tank with a diffused air system, and
acts as the first stage of the two-stage activated sludge system. The Pre -Digester Tank receives
the untreated influent from the Equalization Basin. Returned activated sludge (RAS) and the
diffused air provides the initial biological treatment. The effluent from this tank is sent to the
1.7 -million gallon Aeration Tank, which is the second and final stage of activated sludge. The
RAS from the two clarifiers is sent to both the Pre -Digester and the Aeration Tank to introduce
the biological microbes into the untreated and partially treated wastewater respectively.
The Facility Assessment counted the Pre -Digester Tank as a "Preaeration Unit'
the Preliminary Units/Processes Category. Per definition No. 31 of NCAC T . A\Chapter
JUL 30 1996
E. I. du Pont de Nemours and Company
GENTR,AL FILES
® Printed on Recycled Paper
Z-544 Rev. 8/95

Mr. Gregory Nizich
NC DEHNR - DEM
March 4, 1996
Page 2
Rule .0004, "Preaeration" is "a tank constructed to provide aeration prior to primary treatment."
In doing so, two (2) separate points were counted for this tank.
As described above, the Pre -Digester Tank provides activated sludge biological trreatment
(secondary treatment), and should have been counted as part of the Carbonaceous Stage -Diffused
Air System [Item 5(a)(i)] under the Secondary Treatment Units/Processes Category, along with
the Aeration Tank. The ten (10) points for this item should have covered both the Pre -Digester
Tank and the Aeration Tank.
Therefore, I request that the Pre -Digester Tank be counted under Item 5(a)(i), and the two (2)
points added for "Preaeration" be eliminated.
SLUDGE DISPOSAL
The site's wasted excess sludge is dried via steam -heated dryers, and then disposed of at the BFI
(Subpart D) Landfill in Sampson County.
The Facility Assessment counted the sludge disposal as "Land Application (surface and
subsurface) by contracting to a land application operator or landfill operator who holds the land
application permit or landfill permit" [Item 8(b)] under the Residuals Utilization/Disposal
Category. In doing so, two (2) separate points were counted for this disposal activity.
Item 8(b) is defined by Definition No. 22a of NCAC Title 15A\Chapter8\Rule .0004, which
states in part:
"(22) Land application:
(a) Sludge Disposal. A final sludge disposal method by which wet sludge may be
applied to land either by spraying on the surface or by subsurface injection"
I believe that our sludge disposal is outside of this definition. Our dried sludge is not wet and
could not physically be sprayed on the surface nor injected underground. If the sludge does not
meet Definition 22a, then our sludge disposal should not be counted under Item 8(b).
Therefore, I request that the two (2) points. allocated for the sludge `disposal activity counted
under Item 8(b) be eliminated.
SUMMARY
I hope that you will agree that the above two items have been incorrectly categodv- , and that the ;
four total points given for those items should be removed from the classification poin'tc 1,
CENSRII:- l

S
Mr. Gregory Nizich
NC DEHNR - DEM
March 4, 1996
Page 3
resulting in a new point total of 65 points, and a maintaining of the current Class III Facility
classification for this site's WWTP.
Please feel free to call me at [phone] to discuss this matter.
cc: Mr. Michael Wicker, DEHNR, Fayetteville
Mr. Ken Averitte, DEHNR, Fayetteville
Mr. John E. Hagle, DuPont
Mr. Robert J. Geddie, DuPont
Michael E. Johnson
Environmental Coordinator
-
Its
UUL 30 1996
CENTRAL FILES

DIVISION OF ENVIRONMENTAL MANAGEMENT
March 26, 1996
MEMORANDUM
To: Ken Averitte
Fayetteville Regional Office
From: Greg Nizich
NPDES Pers oup
Subject: Rerouting Nafion® Wastestream
DuPont Automotive
NPDES Permit No. NC0003573
Bladen County
The attached correspondence from Michael Johnson documents the facilities plan to
reroute wastewater from the Nafion® BFPO Process Scrubber and Waste Gas Scrubber
around the WWTP and discharge into the wood lined ditch. The/have performed BOD
analysis and WET testing on these wastestreams. No measurable BOD was found and
the WET data indicated no toxic effects.
To incorporate this proposal into their permit, it would be necessary to establish a new
outfall and require quarterly toxicity testing and annual monitoring for the OCPSF
priority pollutants contained in 40 CFR 414, Appendix J.
Let me know if you have any concerns with their proposal, or with the need to establish a
new outfall to monitor this wastestream.
Attachment
JUL 30 1996
CENTRAL FILES

DIVISION OF ENVIRONMENTAL MANAGEMENT
March 26, 1996
M E M 0 R A N D U M
TO:LNPDES
g Nizich Review Engineer
Per itsFROM:Averitte
Fayettevilleegional Office
SUBJECT: Plant Classification
E.T. DuPont, NPDES Permit NC0003573
Bladen County
RFCFT7F MAS 1995
, ,- 6 anV
We have reviewed the memorandum from Ron Ferrell of the Technical
Assistance and Certification Group and agree with their decision on removal of
the points for preaeration and sludge disposal. Although there is a
possibility of "super bug" addition, which would keep in place the Class IV
rating, it is our opinion that there is no justifiable need to pursue this
issue at this time. This is based on the compliant history of the facility and
questions over the real value of the extra data.
If you have questions or if we can be of assistance, please advise.
KLA/ka
JUL 30 1996
t,
CENTRAL FILES

DIVISION OF ENVIRONMENTAL MANAGEMENT
March 22, 1996
MEM
zich
To: Greg Ni pj�
NPDES up
7%7
From: Ron Ferrell
Technical Assistance and Certification Group
Subject:
Plant Classification
DuPont Autoi"ve
NPDES Permit No. NC0003573 A0
Bladen County cri
In Michael Johnson's letter of March 4, 1996, there are two items on the rating sheet that
are being questioned. The facility was assigned points for having the Pre -Digester Tank
rated as a preacration unit and for having their sludge disposal method rated under the
section heading of Residuals Utilization/Disposal.
Preaeration is a wastewater treatment process used to help grit removal, to freshen
wastewater, to remove gases, to add oxygen, and to aid coagulation. Preaeration consists
of aerating wastewater for 10 to 45 minutes. On the basis of the description of the Pre -
Digester Tank in Mr. Johnson's letter, the detention time in this tank is greater than three
hours and the tank contains activated sludge. Ile stabilization process will start in this tank
if the aeration requirements are met and there are sufficient amounts of microorganisms.
This tank does not meet the requirements to be rated as a preaeration unit. Based upon the
available information, the Pre -Digester Tank is a part of the secondary treatment unit and no
additional points should be assigned to this unit.
The disposal of residuals by burial in a landfill is not subject to rating (the purpose of the
rating sheet is to establish the level of certification of the operator in responsible charge and
it doesn't require much knowledge or training to bury residuals). Land application of
residuals at a landfill means that the residuals are applied to the final landfill cover or
incorporated into the top six inches of final cover. The two points given to DuPont in
section 8 (b) should be eliminated.
cc: Michael Wicker, FRO
trill
CENTRAL FILES

DuPont Automotive
P.O. Drawer Z
Fayetteville, NC 28302
DuPont Automotive
December 8, 1995
Mr. Gregory Nizich
NC DEHNR - DEM
Water Quality Section
Permits & Engineering Unit
P. O. Box 29535
Raleigh, NC 27626-0535
RE: NPDES Permit No. NC0003573
Dear Mr. Nizich:
Enclosed are the confidential pages for our recently submitted NPDES renewal application.
Due to the sensitive nature of this information, i.e. production rates, we request that you treat
this material as "company confidential", and ensure that it does not become part of the public
file.
Also, as we discussed last week, two additional Outfall 002 analyses for di-n-octyl phthlate
will be sent to you within the next several weeks. The single Outfall 002 Method 625 analysis
performed as part of the application's required OCPSF priority pollutant monitoring, indicated -
the presence of di-n-octyl phthlate at 23 gg/L. We believe that this was due to some sampling „r
contamination, and are confident that the two additional analyses will prove the absence of
this compound.
If you have any questions, please feel free to call me at [phone].
Michael E. Johnson
Environmental Coordinator
i.. t
f
�• i i -A }�
3'
Enclosures
i U L Q 1,996
E. I. du Pont de Nemours and Company ® Printed on Recycled Paper
FF -9522 Rev 5/93

DEPARTMENT OF ENVIRONMENT HEALTH AND NATURAL RESOURCES
DIVISION OF ENVIRONMENTAL MANAGEMENT
FRCT SHEET
APPLICATION FOR
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
PERMIT TO DISCHARGE TREATED WASTEWATER
Application No. NC0003573
1. SYNOPSIS OF APPLICATION
Applicant's Name
E.I. DuPont de Nemours & Co., Inc.
Applicant's Address
PO Drawer Z
Fayetteville, NC 28302
Facility Address
NC Highway 87
Duart
Date 4119/96
Type of Operation
Manufacture of polyvinyl butyral resin, fluoro carbons, and sheeting products
Design Capacity of Facility
2 MGD
Applicant's Receiving Waters
Receiving Stream: Cape Fear River
Classification: C
Sub -Basin: 03-06-16
See Attachment A for a map showing the discharge location (s).
9dw n ,p
JUL 30 1996
CENTRAL FILES , 1

Description of Wastewater Treatment Facilities
The existing wastewater treatment facilities consisting of neutralization, equalization, a nutrient
feed system, a sludge aeration basin, an aeration tank, clarification, disinfection facilities, a sludge
filter press (001), boiler blowdown, once through cooling water, and filter backwash discharge
(002), Nafion® scrubber and Nafion® waste gas scrubber discharge (004).
See Attachment B (for operating facilities).
Type of Wastewater (as reported by applicant)
3 % Domestic
97 % Industrial
2.
3
4.
5.
11
':•i• Y 0=1LIM1000131imptemp
See attached copy of Effluent Page (s) from Draft Permit.
Qi .IY • 1 70 Lei: • 11: ul ►Y
The applicant will be required to monitor regularly for flow and those parameters limited in
Section 2 above with sufficient frequency to ensure compliance with the permit conditions.
Frequency, methods of sampling, and report dates will be specified in the final permit.
EFFECTIVE DATE OF PROPOSED EFFLUENT LIM1TS
(AND COMPLIANCE SCHEDULE IF APPLICABLE)
The limits become effective on the date of permit issuance.
Part III, Condition 6. Chronic Toxicity Limit
BASIS FOR PROPOSED EFFLUENT LIMIT
JUL SO 1996
CENTRAL FILES

The proposed effluent limits for BOD5, TSS, and pH are based on 40 CFR Part 414.41,
Subpart D - Thermoplastic Resins.
The chronic toxicity limit is based on the instream waste concentration in the receiving stream.
The remaining effluent limits in the permit are based on 40 CFR Part 414.91, Subpart I - Direct
Discharge Point Sources that Use End -of -Pipe Biological Treatment (outfall 001) and Subpart J -
no End -of -Pipe Treatment (outfall 004).
The limit for Fluoride (outfall 002) is based on Water Quality criteria covered in NCAC 2B .0211.
7. RE QUESTED VARIANCES OR ALTERNATIVES TO REQUIRED STANDARDS
O•Z • •• NT M I •I ON fm a "IT t MW• • •
The previous NPDES permit contained the following limitations (expressed as monthly
averages):
002
Fluoride 5000lbs/day
The NPDES Permit expires on: 6-- 1- 01
9. THE ADMMSTRATIVE RECORD
JUL SO 1996
The administrative record, including application, draft permit, fact sheet, public notice,
comments received, and additional information is available by writing the Division of" w `--" --" - R
001
Flow
2.0 MGD
BOD, 5 -day, 20°C
175 lbs/day
TSS
292 lbs/day
pH
6-9 s.u.
002
Fluoride 5000lbs/day
The NPDES Permit expires on: 6-- 1- 01
9. THE ADMMSTRATIVE RECORD
JUL SO 1996
The administrative record, including application, draft permit, fact sheet, public notice,
comments received, and additional information is available by writing the Division of" w `--" --" - R

Environmental Management, Water Quality Section, P.O. Box 29535, Raleigh, North
Carolina 27626-0535. The above documents are available for review and copying at the
Archdale Building, 9th Floor, Water Quality Section, Permits and Engineering Unit, 512
North Salisbury Street, Raleigh, North Carolina 27611 between the hours of 8:00 a.m. and
5:00 p.m. Monday through Friday. Copies will be provided at a charge of 10 cents per
page.
1 kQ n • el
Additional information concerning the pemnit application may be obtained at the above
address during the hours stated in item No. 9 by contacting: Greg Nizich at (919)
733-5083.
Draft Permit to Public Notice - 4/24/'96
Permit Scheduled to Issue - 6(1/96
12. PROCEDURES FOR THE FORMULATION OF FINAL DETERMINATIONS
The Division of Environmental Management proposed to issue an NPDES Permit to this
applicant subject to the effluent limitations and special conditions outlined above. These
determinations are tentative and are open to comment from the public.
Interested persons are invited to submit written comments on the permit application or on
the Division of Environmental Management's proposed determinations to the following
address:
DIVISION OF ENVIRONMENTAL MANAGEMENT
WATER QUALITY SECTION
POST OFFICE BOX 29535
RALEIGH, NORTH CAROLINA 27626-0535
All comments received within thirty days following the date of public notice will be
considered in the formulation of final determinations with regard to this app
'o
b. Public Hearing JUL 30 1996
The director of the Division of Environmental Management may hold a public WL FILES
there is a significant degree of public interest in a proposed permit or grog p of permits.

Public notice of such a hearing willtie circulated in newspapers in the geographical area of
the discharge and to those on the Division of Environmental Management's mailing list at
least thirty days prior to the hearing.
C. AMmal Hearings
An applicant whose permit is denied, or is granted subject to conditions he deems
unacceptable, shall have the right to a hearing before the Commision upon making written
demand to the Director within 30 days following issuance or denial of the permit.
d. Issuance of the nernut when no hearing is held
If no public hearing or appeal hearing is held, and after review of the comments received,
the Division of Environmental Management's determinations are substantially unchanged,
the permit will be issued and become effective immediately. This will be the final action of
the Division of Environmental Management.
If a hearing is not held, but there have been substantial changes, public notice of the
Division of Environmental Management's revised determinations will be made. Following
a 30 -day comment period, the permit will be issued and will become effective immediately.
This will be the final action of the Division of Environmental Management unless a public
or appeal hearing is granted.
JUL f 1996
CENTRAL FILES

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�TT 5
DFS36501 SESSION READY FOR INPUTGKEX8VMP
COMPLIANCE EVALUATION ANALYSIS REPORT PAGE 1
PERMIT--NC0003573 PIPE --001 REPORT PERIOD: 9503-9602 LOC ---E
FACILITY--DUPONT-FAYETTEVILLE DESIGN FLOW-- 2.0000 CLASS --2
LOCATION--FAYETTEVILLE REGION/COUNTY--06 BLADEN
50050 00310 00530 TGP3B 00010 00400 00556 00600
MONTH Q/MGD BOD RES/TSS CERI7DPF TEMP PH OIL-GRSE TOTAL N
LIMIT F 2.0000 F 175.40 F 292.3 NOL 9.0 6.0 NOL NOL
95/03 1.0488 47.69 71.7 21.76 8.3-6.7 5.000 13.800
95/04 1.0058 47.00 127.1 22.41 8.1-7.6 5.000 31.300
LIMIT F 2.0000 F 175.40 F 292.3 NOL NOL 9.0 6.0 NOL NOL
95/05 .9067 85.21 123.3 1 24.40 7.6-7.2 5.000 27.400
95/06 .9339 136.69 215.8 26.30 7.6-7.1 5.000 31.000
95/07 .8451 53.50 90.2 30.91 7.7-7.3 5.000 5.000
95/08 .7947 44.78 3.6 1 25.92 7.6-7.1 .000 5.000
95/09 .8784 29.41 13.0 26.66 7.5-7.1 .000 34.000
95/10 .9504 24.46 18.9 23.00 7.6-7.1 .000 39.000
95/11 .7928 115.61 382.9F 1 20.15 7.6-7.0 .000 10.000
95/12 .7460 18.45 181.6 17.66 8.0-7.5
96/01 .9280 77.53 301.6F 17.86 7.7-7.3 .000 31.900
96/02 .9023 52.65 50.4 1 19.08 7.4-6.6 .000 4.970
AVERAGE .8944 61.08 131.6 1 23.00 2.272 21.215
MAXIMUM 1.6780 1006.00 3632.0 1 35.00 8.300 5.000 39.000
MINIMUM .3260 LESSTHAN LESSTHAN 1 13.00 6.600 .000 4.970
UNIT MGD LBS/DAY LBS/DAY PASS/FAI DEG.0 SU MG/L MG/L
JUL 30 1996
CENTRAL FILES

GKEX88/MP 04/19/96
COMPLIANCE EVALUATION ANALYSIS REPORT PAGE 2
PERMIT--NC0003573 PIPE --001 REPORT PERIOD: 9503-9602 LOC ---E
FACILITY--DUPONT-FAYETTEVILLE DESIGN FLOW-- 2.0000 CLASS --2
LOCATION--FAYETTEVILLE REGION/COUNTY--06 BLADEN
00665 32102 32103 34200 34205 34215 34220 34230
MONTH PHOS -TOT CARBNTET 12DICLET ACENAPHT ACENAPHT ACRYLONI ANTHRACE BENZBFLU
LIMIT NOL
95/03 2.1000
95/04 6.1000
LIMIT NOL
95/05 3.1000
95/06 1.9000
95/07 2.5000
95/08 .3000
95/09 .6000
95/10 .2200
95/11 .3000
95/12
96/01 3.4000
96/02 2.6000
AVERAGE 2.1018
MAXIMUM 6.1000
MINIMUM .2200
UNIT MG/L LBS/DAY LBS/DAY LBS/DAY LBS/DAY LBS/DAY LBS/DAY LBS/DAY
i
JUL 30 1996
t
CENTRAL FILE'S

GKEX88/MP 104/19/96
COMPLIANCE EVALUATION ANALYSIS REPORT PAGE 3
PERMIT--NC0003573 PIPE --001 REPORT PERIOD: 9503-9602 LOC ---E
FACILITY--DUPONT-FAYETTEVILLE DESIGN FLOW-- 2.0000 CLASS --2
LOCATION--FAYETTEVILLE REGION/COUNTY--06 BLADEN
34242 34247 34301 34311 34320 34336 34341 34371
MONTH BENZO W BENZO W CHLOROBE CHLOROET CHRYSENE DIETHYLP DIMETHYL ETHYLBEN
LIMIT
95/03
95/04
LIMIT
95/05
95/06
95/07
95/08
95/09
95/10
95/11
95/12
96/01
96/02
AVERAGE
MAXIMUM
MINIMUM
UNIT LBS/DAY LBS/DAY LBS/DAY LBS/DAY LBS/DAY LBS/DAY LBS/DAY LBS/DAY
JUL 80 1996
CENTRAL FILES

GKEX88/MP 04/19/96
COMPLIANCE EVALUATION ANALYSIS REPORT PAGE 4
PERMIT--NC0003573 PIPE --001 REPORT PERIOD: 9503-9602 LOC ---E
FACILITY--DUPONT-FAYETTEVILLE DESIGN FLOW-- 2.0000 CLASS --2
LOCATION--FAYETTEVILLE. REGION/COUNTY--06 BLADEN
34376 34381 34396 34418 34423 34447 34461 34469
MONTH FLUORANT FLUORENE HEXACHLO METHYLCH METHYLEN NITROBEN PHENANTH PYRENE
LIMIT
95/03
95/04
LIMIT
95/05
95/06
95/07
95/08
95/09
95/10
95/11
95/12
96/01 JUL 80 1996
96/02 ttNTRAL FILES
AVERAGE
MAXIMUM
MINIMUM
UNIT LBS/DAY LBS/DAY LBS/DAY LBS/DAY LBS/DAY LBS/DAY LBS/DAY LBS/DAY

GKEX88/MP 04/19/96
COMPLIANCE EVALUATION ANALYSIS REPORT PAGE 5
PERMIT--NC0003573 PIPE --001 REPORT PERIOD: 9503-9602 LOC ---E
FACILITY--DUPONT-FAYETTEVILLE DESIGN FLOW-- 2.0000 CLASS --2
LOCATION--FAYETTEVILLE REGION/COUNTY--06 BLADEN
34475 34496 34501 34506 34511 34526 34536 34541
MONTH TETRACHL 11DICHLO 11DICHLO 111TRICH 112TRICH BENZO(A) 12DICHLO 12DICHLO
LIMIT
95/03
95/04
LIMIT
95/05
95/06
95/07
95/08
95/09
95/10
95/11
95/12
96/01
96/02
AVERAGE
MAXIMUM
MINIMUM
UNIT LBS/DAY LBS/DAY LBS/DAY LBS/DAY LBS/DAY LBS/DAY LBS/DAY LBS/DAY
JUL 30 1996
;': CENTRAL FILES

GKEX88/MP 04/19/96
COMPLIANCE EVALUATION ANALYSIS REPORT PAGE 6
PERMIT--NC0003573 PIPE --001 REPORT PERIOD: 9503-9602 LOC ---E
FACILITY--DUPONT-FAYETTEVILLE DESIGN FLOW-- 2.0000 CLASS --2
LOCATION--FAYETTEVILLE REGION/COUNTY--06 BLADEN
34546 34551 34566 34571 34591 34601 34606 34611
MONTH 12DICHLO 124TRICH 13DICHLO 14DICHLO 2NITROPH 24DICHLO 24DIMETH 24DINITR
LIMIT
95/03
95/04
LIMIT
95/05
95/06
95/07
95/08
95/09
95/10
95/11
95/12
96/01
96/02
AVERAGE
MAXIMUM
MINIMUM
UNIT
LBS/DAY LBS/DAY LBS/DAY LBS/DAY LBS/DAY LBS/DAY LBS/DAY LBS/DAY
JUL 30 1996
' CENTRAL FILES �'�

GKEX88/MP 04/19/96
COMPLIANCE EVALUATION ANALYSIS REPORT PAGE 7
PERMIT--NC0003573 PIPE --001 REPORT PERIOD: 9503-9602 LOC ---E
FACILITY--DUPONT-FAYETTEVILLE DESIGN FLOW-- 2.0000 CLASS --2
LOCATION--FAYETTEVILLE REGION/COUNTY--06 BLADEN
MONTH
LIMIT
95/03
95/04
LIMIT
95/05
95/06
95/07
95/08
95/09
95/10
95/11
95/12
96/01
96/02
34616 34626 34646 34657 34696 39100 39110 39175
24DINITR 26DINITR 4NITROPH 46DINITR NAPTHALE B2E PHTH DNB PHTH VINYLCHL
AVERAGE
MAXIMUM
MINIMUM
UNIT LBS/DAY LBS/DAY LBS/DAY LBS/DAY LBS/DAY LBS/DAY LBS/DAY LBS/DAY
JUL 30 1996
�ENTRAI- FILES

GKEX88/MP 04/19/96
COMPLIANCE EVALUATION ANALYSIS REPORT PAGE 8
PERMIT--NC0003573 PIPE --001 REPORT PERIOD: 9503-9602 LOC ---E
FACILITY--DUPONT-FAYETTEVILLE DESIGN FLOW-- 2.0000 CLASS --2
LOCATION--FAYETTEVILLE REGION/COUNTY--06 BLADEN
39700 39702
MONTH HCB HEXCLBD
LIMIT
95/03
95/04
LIMIT
95/05
95/06
95/07
95/08
95/09
95/10
95/11
95/12
96/01
96/02
AVERAGE
MAXIMUM
MINIMUM
UNIT LBS/DAY LBS/DAY
i
JUL s0 1996 i
CENTRAL FILES

GKEX88/MP 04/19/96
COMPLIANCE EVALUATION ANALYSIS REPORT PAGE 1
PERMIT--NC0003573 PIPE --002 REPORT PERIOD: 9503-9602 LOC ---E
FACILITY--DUPONT-FAYETTEVILLE DESIGN FLOW-- 2.0000 CLASS --2
LOCATION--FAYETTEVILLE REGION/COUNTY--06 BLADEN
50050 00310 00340 00010 00400 00951
MONTH Q/MGD BOD COD TEMP PH FLUORIDE
LIMIT NOL NOL NOL 9.0 6.0
95/03 14.8345 22.58 8.3-7.5 469.250
95/04 14.4570 25.80 8.3-7.7 376.250
LIMIT NOL NOL NOL NOL 9.0 6.0
95/05 15.8035 2.00 17.0 27.93 8.3-7.3 914.200
95/06 17.6660 27.96 7.3-6.7 1110.250
95/07 14.9635 29.41 7.3-6.7 1094.000
95/08 15.5196 .00 .0 26.00 7.7-7.0 1225.400
95/09 12.5253 22.36 7.7-6.9 1176.750
95/10 13.0548 21.22 7.4-6.8 1333.400
95/11 13.0550 .00 32.0 11.70 8.2-7.2 1184.750
96/01 12.1132 8.03 8.1-7.2 1428.600
96/02 11.1762 3.48 27.0 6.66 7.7-7.2 1033.750
AVERAGE 14.1062 1.37 19.0 20.87 1031.509
MAXIMUM 19.6200 3.48 32.0 33.00 8.300 2446.000
MINIMUM 6.9200 LESSTHAN .0 4.00 6.700 44.000
UNIT MGD MG/L MG/L DEG.0 SU LBS/DAY
JUL 30 1996
CENTRAL FILES