NC0003875_Permit (Issuance)_19960930

NPDES DOCUMENT SCANNING% COVER SHEET
NC0003875
Castle Hayne plant WWTP
NPDES Permit:
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Correspondence
Owner Name Change
Staff Comments
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
September 30, 1996
This document is printed on reuse paper - ignore any
cortterit on the reYerse side

5
State of North Carolina
pepartment 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
September 30,1996
Mr. Gene F. Renzaglia
Occidental Chemical Corporation
5408 Holly Shelter Road
Castle Hayne, North Carolina 28429
iigf
QEE—INJ I
Subject: NPDES Permit Issuance
Permit No. NC0003875
Occidental Chemical Corporation
New Hanover County
Dear Mr. Renzaglia:
In accordance with your application for discharge permit received on February 5,1996 by the
Division, we are forwarding herewith the subject permit to discharge under 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 U.S. Environmental Protection Agency dated
December 6,1983 and as subsequently amended.
Effluent limits were calculated on the basis of 40 CFR 415.172 (Subpart Q) for production of sodium
dichromate and by-product sodium sulfate. These guidelines stipulate that effluent pollutant limits should be
based solely on the amount of sodium dichromate produced, which causes a 21% reduction in allowable TSS.
Due to the requested reduction in design flow from 1.04 to 0.785 MGD, toxicants and WET test limits have
been adjusted.
The following changes have been made per your letter to Mr. Goodrich dated August 30,1996. BOD
monitoring has been changed to twice a month for outfalls 001 and 002, Fecal Coliform monitoring has been
changed to twice a month for outfall 002, and Copper monitoring has been reduced to quarterly for outfall
001. Also, instream monitoring is waived if you are a participant in the UNC-W Cape Fear River Program
and this is noted on the effluent monitoring page
If any parts, measurement frequencies or sampling requirements contained in this permit are
unacceptable to you, you have the right to an adjudicatory 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 that this permit is not transferable except after notice to the Division of Water
Quality. Part II, E.4. addresses the requirements to be followed in case of change in ownership or control of
this discharge. The Division of Water Quality may require modification or revocation and reissuance of the
permit.
P.O. Box 29535, Raleigh, North Carolina 27626.05.35 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recyded/ 10% post -consumer paper

NPDES Permit Issuance
Permit No. NC0003875
Occidental Chemical Corporation
September 30, 1996
This permit does not affect the legal requirements to obtain other permits which may be required by the
Division of Water Quality or permits required by the Division of Land Resources, the Coastal Area
Management Act or any other Federal or Local govemmental permit that may be required.
If you have any questions concerning this permit, please contact Mary Cabe at telephone number (919)
733-5083, extension 518.
Sincerely,
Original Sig...
David A. Goodri...:
A. Preston Howard, Jr., P. E.
cc: Central Files
Mr. Roosevelt Childress, EPA
Wilmington Regional Office/Water Quality Section
Permits & Engineering Unit
Facility Assessment Unit

Permit No. NC0003875
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT, HEALTH, AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
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,
Occidental Chemical Corporation
is hereby authorized to discharge wastewater from a facility located at the
Castle Hayne Plant
on NCSR 1002
northeast of Castle Hayne
New Hanover County
to receiving waters designated as the Northeast Cape Fear River (outfalls 001 and 002) and an unnamed
tributary to the Northeast Cape Fear River (outfall 003) in the the Cape Fear River Basin
in accordance with effluent limitations, monitoring requirements, and other conditions set forth in Parts I,
II, III and IV hereof.
The permit shall become effective November 1,1996.
This permit and the authorization to discharge shall expire at midnight on July 31, 2001.
Signed this day September 30,1996.
Original Signed By
David A. Goodrich
A. Preston Howard, Jr., P.E., Director
Division of Water Quality
By Authority of the Environmental Mangement Commission

Permit No. NC0003875
SUPPLEMENT TO PERMIT COVER SHEET
Occidental Chemical Corporation
is hereby authorized to:
1. Continue to operate the existing process wastewater treatment facility consisting of a storage
tank, six (6) batch reactors, recirculation/equalization tank, a series of three (3)
hydrocyclones followed by a series of three (3) polymer feed systems/thickeners and
clarifiers, and pressure sand filters with discharge through outfall 001, and, continue to
operate the domestic wastewater treatment facility consisting of dual train extended aeration
package plants with effluent disinfection by tablet chlorination with discharge through
outfall 002, and continue to discharge water from a car rinse facility through outfall 003,
and,
2. Discharge from said treatment works at the location specified on the attached map into the
the Northeast Cape Fear River (outfalls 001 and 002) and into an unnamed tributary to the
Northeast Cape Fear River (outfall 003) both classified as Class B-Swamp waters in the
Cape Fear River Basin.

A. (). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS FINAL Permit No. NC0003875
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to discharge from
outfall(s) sepal number 001. Such discharges shall be limited and monitored by the permittee as specified below:
Effluent Vharacteristics
Flow
BODE 5 Day, 20 °C
TSS
Hexavalent Chromium"'
Total Chromium
Nickel
Temperature
Total Nitrogen (NO2+NO3+TKN)
Total Phosphorus
Chronic Toxicity'"
Copper
Chloride
Lbs/day
film...AM Daily
135.8
0.31
2.72
0.94
DIscharye Limitations
Units (specIfyl
Max Mon. Ava. Daily Max.
0.785 MGD
300.8
0.62
6.02
1.87
Monitoring
Measurement
Frequency
Continuous
2/Month
3/Week
Daily
Daily
Daily
3/Week
Quarterly
Quarterly
Quarterly
Quarterly
Daily
Requirements
Sample *Sample
Tvpe Location
Recorder I or E
Composite E
Composite E
Composite E
Composite E
Composite E
Grab E
Composite E
Composite E
Composite E
Composite E
Composite E
* Sample locations: E - Effluent, I - Influent
** Chronic Toxicity (Ceriodaphnia) P/F at 4.6%; February, May, August, and November; See Part III, Condition E.
*** A composite sample may be used if the sample is analyzed within 24 hours of the first sample portion collected.
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored three times per week at the effluent
by grab sample.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

3808
11,17.
230 000 =�
FEET
34°22 {r y.
38Q7000n N
fo,cie4
ot'r
7 S f 3806
ROAD CLASSIFICATION
PRIMARY HIGHWAY
HARD SURFACE
SECONDARY HIGHWAY
HARD SURFACE
LIGHT -DUTY ROAD, HARD OR
IMPROVED SURFACE
UNIMPROVED ROAD = _ =
Map # J27SE Sub -basin 03-06-23
Stream Class B Swamp
Discharge Class Process/Sanitary/Rinse
Receiving Stream Northeast Cape Fear River
Design Q o.8os MGDPermit expires 07/31/01
SCALE 1:24 000
0
1 MILE
0
7000 FEET
,cexxaar,
0
1 KILOMETER
lataig
1
CONTOUR INTERVAL 5 FEET
Occidental Chemical Corp.
NC0003875
New Hanover County

A. (). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS FINAL Permit No. NC0003875
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to discharge from
outfall(s) serial number 002. Such discharges shall be limited and monitored by the permittee as specified below:
Effluent Characteristics
Flow
BOD, 5 day, 20°C
Total Suspended Residue
NH3 as N
Dissolved Oxygen**
Fecal Coliform (geometric mean)
Total Residual Chlorine
Temperature
Conductivity
Salinity
Discharge Limitations
Monthly Avg,
0.020MGD
30.0 mg/I
30.0 mg/I
200.0 /100 mi
Weekly Avg,
Daily Max
45.0 mg/I
45.0 mg/I
Monitoring
Measurement
Frequency
Weekly
2/Month
Weekly
2/Month
Weekly
400.0 /100 mi 2/Month
2/Week
Weekly
Weekly
Weekly
Requirements
Sample
Typee
Instantaneous
Grab
Grab
Grab
Grab
Grab
Grab
Grab
Grab
Grab
*Sample
Location
I or E
E
E
E
E, U, D
E
E
E, U, D
U, D
U, D
* Sample locations: E - Effluent, I - Influent, U - Upstream of the outfall (at least 100 yards) at the nearest accessible point, D - Downstream
at Hwy 117 bridge at Castle Hayne. Instream monitoring is waived as long as the facility is a participant in the UNC-W Cape Fear River
program.
** The daily average dissolved oxygen effluent concentration shall not be less than 5.0 mg/1.
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored weekly at the effluent by grab
sample.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

A. (). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS FINAL Permit No. NC0003875
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to discharge from
outfall(s) serial number 003. Such discharges shall be limited and monitored by the permittee as specified below:
Effluent Characteristics
Flow
Settleable Solids
BOD, 5 Day, 20 °C
Turbidity
MBAS
Lbs/day
Discharge Limitations
Units (specIfyl
Monitoring
Measurement
Mon. Avg, Daily Max Mon. Ant Daily Max. Frequency-
0.010 MGD Weekly
0.1 ml/I 0.2 ml/I 2/Month
Quarterly
Quarterly
Quarterly
Requirements
Sample *Sample
Type Location
Instantaneous I or E
Grab E
Grab E
Grab E
Grab E
* Sample locations: E - Effluent, I - Influent
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored 2/month at the effluent by grab
sample.
There shail'be no discharge of floating solids or visible foam in other than trace amounts.

Part III
Permit No. NC0003875
E. Chronic Toxicity Limit (Ceriodaphnia, Quarterly Pass/Fail)
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 4.6% (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, DWQ Form AT-1 (original) is to be sent to the following address:
Attention:
Environmental Sciences Branch
Division of Water Quality
North Carolina Department of EHNR
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 Water Quality indicate potential impacts to the receiving stream, this permit may be
reopened and modified to include alternate monitoring requirements or limits.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum
control organism survival 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.

w cL4 5 A--- -�
NPDES WASTE LOAD ALLOCATION
PERMIT NO.: NC0003875
PERMITTEE NAME: Occidental Chemical Corporation
FACILITY NAME: Castle Hayne Plant
Facility Status: Existing
Permit Status:
Major 'l
Pipe No.: 001
Renewal with Modification
Minor
Design Capacity: 0.785 MGD*
Domestic (% of Flow):
Industrial (% of Flow): 100 %
Comments:
* Requested flow decrease from 1.04 MGD to 0.785 MGD
--e.co-
., tv.e,,.f- c(. )
RECEIVING STREAM: the Northeast Cape Fear River
Class: B-Swamp
Sub -Basin: 03-06-23
Reference USGS Quad: J 27 NE
County: New Hanover
Regional Office: Wilmington Regional Office
Previous Exp. Date: 07/31/96 Treatment Plant Class: Class IV
Classification changes within three miles:
none
Requested by: Jeanette Powell
Prepared by: ,�,a,1 r
Reviewed by: ,
Z 1<L
(please attach)
Date:
Date:
aSr
02//96
D la7
Modeler
Date Rec.
#
-c__�
z,ctk,
4s
Drainage Area (mi2 ) 1112.6. Avg. Streamflow (cfs): / 'C)O
7Q10 (cfs) 2__.6 Winter 7Q10 (cfs) 30Q2 (cfs)
Toxicity Limits: IWC Li 6 %
Instream Monitoring:
Parameters Tr- v►i/3 .1 /JO,
Acutel�hroni)
c_ d. SAI,n, y
Upstream � 5 Location 1Yt
Tlnwnstream Ve.5 Location H,,ti�1 !17 hrid4e_
Recommended Limits
Flow (MGD):
BOD5 (lbs/day):
TSS (lbs/day):
Hexavalent Chromium (lbs/day):
Total Chromium (1bs/day):
Monthly Avg.
0.785
montior
135.8
0.31
2.72
Daily Max.
0.785
300.8
0.62
6.02
Nickel (lbs/day):.
Copper (1.1g/1):
pH (SU):
Chloride (mg/1):
TN (mg/1):
TP (mg/1):
0.94 1.87
monitor
6.0-9.0
monitor
monitor
monitor
I
See OD)
0
rt.
cl-
51,kfic,�
Comments: A L'c.. J 1 /, rn d- 1,,,3
no rnc.ree-5e. c 610,7` A.5 0-eT L,S,,QO re c ow141 f-4140(c' 'iark

EFFLUENT GUIDELINE LIMITATIONS
Occidental Chemical Corporation
NC0003875
Type of Product Produced
Daily Max.
1000 Ibs/day
Mo. Avg.
1000 Ibs/day
Effluent Guideline Reference
Sodium Dichromate Dihydrate
Chromic Acid
683.6
317.14
617.134
240.643
40 CFR 415, Subpart Q
40 CFR 415, Subpart Al
Effluent Parameter
EPA Limitations in 40 CFR
(Ibs/1000 Ibs of product)
Effluent Limits
(Ibs/ day)
Comments
Daily Max
30 day avg.
Daily Max
30 day avg.
pH
6.0-9.0
6.0-9.0
6.0-9.0
6.0-9.0
40 CFR 415.172
TSS
0.4400
0.2200
440.3256
188.71094
40 CFR 415.172
Hexavalent Chromium
0.0009
0.0005
0.900666
0.4288885
40 CFR 415.172
Total Chromium
0.0088
0.0044
8.806512
3.7742188
40 CFR 415.172
Total Nickel
0.0068
0.0034
6.805032
2.9164418
40 CFR 415.172
Note: Subpart Al provides a BPT allocation by reference to Subpart Q, 40 CFR 415.72. Therefore, the facility is
subjec to the same guideline limitations applied twice - once for sodium dichromate production and once for
chromic acid production.

State of North Carolina
Department of Environment,
Health and Natural Resources
Division of Environmental Management
James B. Hunt. Jr., Governor
Jonathan 8. Howes. Secretary
A. Preston Howard, Jr., P.E., Director
Av" WA IA
EBI-INJF
Division of Environmental Management
Water Quality Section
Fax [phone]
PROM: leanettc Powell
PHONE: [phone] text. 537
J
rNO.OF IAAGES (including this sheet: 1
1
REQUEST FOR ADDITIONAL INFORMATION
Occidental Chemical Corp. - Castle Rayne Plant
NC;10003875
As we discussed this morning, additional production information is required in order to proceed with
review and issuance of your NPDES permit renewal. For both chromic acid and sodium dichromate
processes, the daily maximum production and monthly average production figures are required. The
following table illustrates the required information. The reported values should be based on a minimum
of one years production data, with 3 to 5 years of data being preferable. Please also indicate the rime
frame evaluated for the figures provided (i.e. Previous 3 years production data). If you have any
questions, please call.
Sodiunt Iiiebromate ihydrate
Facility Production Figures
!k tun
(10001bs/day)
683.6
Chromic- Acid 317.14
(1000y1bs/d �j
617.134
240.643
Basis: Time Period from January 1993 through January 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 paper
10/I0'd St:SI 96, 8 qa3
6IL0-M.-6t6:xpd
3 '8 d-W30

OxyChem®
February 2, 1996
CERTIFIED MAIL
ARTICLE NUMBER Z 023 455 398
RETURN RECEIPT REQUESTED
Mr. David A. Goodrich
Permits and Engineering Unit
Division of Environmental Management/ WQ Section
Post Office Box 29535
Raleigh, North Carolina 27626-0535
Subject: NPDES Permit No. NC0003875 Renewal Application
Dear Mr. Goodrich:
Please find enclosed three copies of the completed Standard Form C
application for renewal of this facility's NPDES permit. A copy of
the letter documenting the signature authority of Gene F. Renzaglia,
the current plant manager, is included. This permit will expire at
midnight on July 31, 1996, therefore this submittal will comply with
the 180 day application deadline.
The schematic of water flow included in the application package shows
a request for a flow limit decrease from outfall 001 from 1.04 MGD
to 0.785 MGD. Experience under the existing permit has demonstrated`o
that the 001 effluent never approaches the .04 MGD flow limitationcl
Also, please note that the lagoon previously permitted under WQ00014
has been closed.
,i
A narrative description of the sludge management plan for the sludge r-ric:;!
generated from wastewater treatment activities is also included.-?�;';:
Please find enclosed a check for $250.00 for the permit renewal cf._',
application processing fee.
If there are any questions or concerns regarding these submittals,
please contact John O'Janpa at [phone].
Sincerely,
C
S3ene F. Renza ,
/Plant Manager
Enclosures
xc: Wilmington Regional office, Permits and Engineering Unit
Mr. Richard DiMassimo, Triangle Environmental, Inc.
't Occidental Chemical Corporation
o� Basic Chemicals Group
5408 Holly Shelter Road, P.O. Box 368. Castle Hayne, North Carolina 28429
910/675-7200. FAX [phone]

QyChem®
May 18, 1995
Mr. Rick Shiver
Regional Supervisor
North Carolina Department of Environment,
Health and Natural Resources
Division of Environmental Management
127 Cardinal Drive Ext.
Wilmington, North Carolina 28405-3845
Re: Authorized Signatory To Permit
Application And Reports
Dear Mr. Shiver:
Resoonmbte Care' �11
A Pubhc Conmat rtent
In accordance with the provisions of 40 CFR 122.22(b) and our corporate procedures, this
letter constitutes delegation of my authorization as a responsible corporate officer to sign reports
required by permits and other information requested and/or required by the North Carolina
Department of Environment, Health and Natural Resources (as defined in 40 CFR 122.22(a) (1)
(i)) to Mr. Gene Renzaglia, the manager of Occidental Chemical Corporation's manufacturing
plant located in Castle Hayne, North Carolina, which has gross annual sales exceeding $25MM,
thus qualifying Mr. Renzaglia as an authorized delegatee under 40 CFR 122.22 (a) (1) (ii).
Since
or an I firistensen
VP and General Manager, Chrome
Chemicals
Specialty Business Group
cc: Mr. A. Preston Howard, Jr., P.E.
Director
North Carolina Department of Environment,
Health and Natural Resources
512 North Salisbury Street
Raleigh, North Carolina 27611
bcc: Mike James
Gene Renzaglia
Riley West
Clea Williamson
o' Occidental Chemical Corporation
v Basic Chemicals Group
5408 Holly Shelter Roaa. P.O. Box 368. Castle Hayne. North Carotina 28429
910/675-7200, FAX [phone]
•

•
a
• •
p)
6
m
RAW MATERIALS
PICKLE
LIQUOR
(FeCl2)
29.000
SULFURIC ACID
1 .500
(1.500)
EVAPORATION
521.000
SURFACE WATER GROUND WATER
RIVER WATER
1,143,200
(1,400,000)
ALL FLOWS IN GPD
PROCESS AREA
STORM WATER
82,000
(82.000)
PROCESS WATER
USAGE
PROCESS WASTE
TREATMENT ri
T
CHLORIDE
530.200 REMOVAL
(787,000) SYSTEM
NUMBERS IN PARENTHESES
REPRESENT 1991 APPLICATION
VALUES WHERE THEY DIFFER
FROM PROPOSED
SCHEMATIC OF WATER FLOW
OCCIDENTAL CHEMICAL CORP.
CASTLE HAYNE. NEW HANOVER CO.
NORTH CAROLINA
REV. 1-23-96 MLD M9290024
WATER IN
PRODUCTS
14.000
REMEDIATION
179.300
(179.300)
POTABLE/PROCESS
265,000
(265.000)
n 16.000,
n n 235.000
20.000
163.300
T
OUTFALL 001
785,000
1.041.800
WATER TO
IMPOUNDMENT
350.000
BASIS: 390 T/DAY
SANITARY
WATER
USAGE
SANITARY
WASTE WATER
TREATMENT
PLANT
OUTFALL
002
20.000
10.000
AUTO
RINSE
STATION
t
OUTFALL
003
10.000

TREATMENT
SURGE
TANK
420
GPM ►
545 GPM
OVERFLOW
TANK
545 GPM
POLISHING
F ILTERS
545 GPM
108
GPM <RIVER
WATER
115 NO. 1
NO. 1 GPM LIGHT
� ~ THICKNER —� RESLURRY
TANK
FEED
SLURRY
TANK
1
115 NO. 2
NO. 2 GPM LIGHT
THICKNER _I..RESLURRY
TANK
_L_
NO. 1
CYCLONE
-►
NO. 1
HEAVY
RESLURRY
TANK
NO. 2
CYCLONE
i
i
NO. 3
THICKNER
TO
ow
RIVER
115
GPM
162
GPM <RIVER
WATER
NO. 2
HEAVY
RESLURRY
TANK
NO. 3
CYCLONE
ir ■
SLUDGE
HOLD
TANK
■ A
30
GPM
NOTE:
98
GPM <RIVER
WATER
■
SLURRY
RETENTION
TANK
4.3
TPH <CEMENT
FINES
243
GPM TO
—111. QUARRY
FLOW RATES ARE AVERAGE
APPROVAL
SO'OLOR
ENGR.
DATE
STR.&, CIVIL
MECHANICAL
ELECT.d INST.
PROCESS
PROJECT
eOCCIDENTAL CHEMICAL CORPORATION
NO.
REVISIONS
n: \dgn1k9140037 .agn Jan. 24. 1996 14: 33: 30
DRWN
APP.
DATE
DRAWN BY BST DATE 1/24/9E
DSG.CAL.BY DATE
CHECKED BY DATE
WASTEWATER TREATMENT AREA
CHLORIDE REMOVAL BLOCK FLOW DIAGRAM
SCALE: NONE
AREA NO. 914
DWG. NO. CHS914-37

STORM >57 GPM
WATER
WELL >25 GPM
WATER
SALT CAKE`30 GPM
SCRUBBER /
COOL 1 NG 20 GPM
TOWER /
BLOWDOWN
REJECT >48 GPM
RESIDUE
PICKLE >10 GPM
LIQUOR
RECYCLE >60GPM
RESIDUE
SUMP
► SURGE
TANK
PICKLE
LIQUOR
132 GPM
3 GPM
PREMIX
TANK
PICKLE
LIQUOR
218 GPM
WASTE
COLLECTION
TANK
7 GPM
BATCH
WATER
REACTOR
12.000 GAL
135 GPM
LIME
SLURRY
2 GPM
REACTORS
(3)
3x24.000 GAL
w
227 GPM
TREATMENT
SURGE
TANK
420 GPM
WATER 58 GPM
TREATMENT
SUMP
TO
CHLORIDE
REMOVAL
APPROVAL
SO'DLDR
ENGR.
DATE
STR.& CIVIL
MECHANICAL
ELECT.6 INST.
PROCESS
PROJECT
OCCIDENTAL CHEMICAL CORPORATION
NO.
REVISIONS
DRWN
APP.
DATE
DRAWN BY BST DATE 1/24/9E
DSG.CAL.BY DATE
CHECKED BY DATE
MODIFIED WASTEWATER TREATMENT
BLOCK FLOW S. GPM FLOWS
SCALE: NONE
AREA NO. 914
DWG. NO. CHS914-36
c: \dgn k9140036.dgn Jan. 24. 1996 12: 54: 54

SITE MAP
OCCIDENTAL CHEMICAL CORPORATION
CASTLE HAYNE, NORTH CAROLINA
1,1SCOT TS HILL ,NC,/970
2/ CASTLE NAM-, .Y C, 1970
SI MOOR£TOWN, N.C,1970
4/ROCKY PO/NT NC ,J970
• - PR/VATS POTABLE WELL
A • MON/TOR/NG WELL
fiN
LAW ENVIRONMENTAL. INC.
SCALE 2000
1 rE£T
Drawn: J ...
Checked:12 '7
Date: W92E:garo
Job No.
Dwg. No.

SLUDGE MANAGEMENT PLAN FOR OCCIDENTAL CHEMICAL
Outfall 001:
The Occidental Chemical Company (" OXYCHEM") Castle Hayne
plant produces sodium bichromate, Chromic acid, and salt cake
from chrome ore, soda ash, and sulfuric acid. AS a result of this
production a wastewater is produced which undergoes extensive
treatment prior to discharge to the Northeast Cape Fear River, as
described in this permit application.
During this wastewater treatment, a non -hazardous residue
is produced which is currently managed in an adjacent limestone
quarry. This activity is conducted in accordance with NC DEHNR,
DEM Permit No. WQ0001492, which expires October 31, 1997.
Outfall 002:
Sanitary wastewater from toilets, sinks, and showers flows
by gravity to a lift station which pumps to an equalization tank.
The flow from the equalization tank is split and feeds two
parallel extended aeration package plants, each rated at 10,000
gpd.
Over time, the amount of activated sludge builds. Excess
sludge is wasted to aerobic digesters. When the digested sludge
has accumulated to the point where settling times are excessive,
the digested sludge is removed for land application.
C & L Utilities of Leland, N. C. has a Land Application
Permit (No. 14549) which includes Occidental's aerobically
digested sanitary sludge.

NPDES WASTE LOAD ALLOCATION
PERMIT NO.: NC0003875
PERMI'1"1'hE NAME:
FACILITY NAME:
Occidental Chemical Corporation
Castle Hayne Plant
Facility Status: Existing
Permit Status:
Major '1
Pipe No.: 002
Renewal with Modification
Minor
Design Capacity: 0.020 MGD
Domestic (% of Flow): 100 %
Industrial (% of Flow): %
Comments:
RECEIVING STREAM: the Northeast Cape Fear River
Class: B-Swamp
Sub -Basin: 03-06-23
Reference USGS Quad: J 27 NE
(please attach)
County: New Hanover
Regional Office: Wilmington Regional Office
Previous Exp. Date: 07/31/96 Treatment Plant Class: Class IV
Classification changes within three miles:
none
Requested by: Jeanette Powell
Prepared by: e ,
,0„-6(
Reviewed by:11-1,tx.) JaA& Jva- V\
„ 135 .77 IL
'Date: 02/0/96
Date: 9 7.,ledqz,
Date. a7�I L
Modeler
Date Rec.
#
5c_t.
a1?8
(353
Drainage Area (mi2 ) / t/ 4 Avg. Streamflow (cfs):
7Q10 (cfs) 75 Winter 7Q10 (cfs) j p 30Q2 (cfs) 1 5 (,
Toxicity Limits: IWC 4.Q % Acute/Chronic
Instream Monitoring:
Parameters Sea- o,-A4p 1( c O J
Upstream _ Location
Downstream Location
•
Existing Limits: f
Wasteflow (MGD):
BOD5 (mg/1):
NH3N (mg/1):
Dissolved Oxygen (mg/1)
TSS (mg/1):
Fecal Col. (/100 ml):
pH (SU):
Residual Chlorine (4/1):
Monthly
0.02
30
monitor
30
200
monitor
Avg. Daily Max.
45
5.0
45
400
6.0-9.0
Comments:

NPDES WASTE LOAD ALLOCATION
PERMIT NO.: NC0003875
PERMITTEE NAME:
FACILITY NAME:
Occidental Chemical Corporation
Castle Hayne Plant
Facility Status: Existing
Permit Status: Renewal with Modification
Major Minor
Pipe No.: 003
Design Capacity: 0.010 MGD
Domestic (% of Flow):
Industrial (% of Flow):
*%
Comments:
* Discharge is from an auto rinse station
v-T
RECEIVING STREAM: the Northeast Cape Fear River
Class: B-Swamp
Sub -Basin: 03-06-23
Reference USGS Quad: J 27 NE
County: New Hanover
Regional Office: Wilmington Regional Office
Previous Exp. Date: 07/31/96 Treatment Plant Class: Class IV
Classification changes within three miles:
none
Requested by: Jeanette Powell
Prepared by: ,v✓ �__rye�� eyt_ (- ,,z
/
Reviewed by: ( Gt �101/)‘_(,/-
", N/
(please attach)
Date: 02/05/96
Date:
Date: `i
Modeler
Date Rec.
#
S-Gt>
Z(- I c)c.
g4-4-4-
2
Drainage Area (mi ) i /A. , Avg. Streamflow (cfs): / yd a
7Q10 (cfs) Winter 7Q10 (cfs) ci o 30Q2 (cfs) (SO
Toxicity Limits: IWC AJ4 % Acute/Chronic
Instream Monitoring:
Parameters ) 4.4:: 1( 00 /
Upstream Location
Downstream Location
Existing Limits:
,
Monthly Avg. Daily Max.
0.01
monitor quarterly
0.1 0.2
monitor quarterly
monitor quarterly
6.0-9.0
Wasteflow (MGD):
BOD5 (mg/1):
Settleable Solids (ml/1)
Turbidity (NTU):
MBAS (mg/1):
pH (SU):
Comments:

State of North Carolina
Department of Environment,
Health and Natural Resources
Ja mes B. Hunt, Jr., Govemor
Jonathan B. Howes, Secretary
Steven J. Levitas, Deputy Secretary
��
�EHNI=1.
Division of Water Quality
Water Quality Section
P.O. Box 29535
Raleigh, N.C. 27626-0535
FAX:[phone]
FAX TO: nc v 4dkr.45
I.Jr in fell /e 1.07/OPPrGe,
FAX NUMBER:
PROM: S-crn C , .60 /(
PHONE: [phone] ext. 5C7
-F6‘.)c€ ; 7/' 3' I
NO. OF PAGES INCLUDING THIS SHEET:
14ere £ - ni c_ comm. n 4 77,c der (. kno,..)
yDu AIrcady doccrs1oc / 0-Ad rU hGae-.14," w,.9--A
c. UT.- et" a je, GIG( r sP 4,1 / cocie4,_
- e- ✓i'l,re„4 5e, da &,v 111oQ( tn;de. fi l e e IIalS d .7
a of l i e i )Q l -'i i Woutld k 1,5 trig/L, 1ookc.0( a-
eP-4ee41+ olocA �c-f i ed 4, ie, 6,71 ; cr ✓c o e- / A r) dt S y ` i
44) I co,xId T.►cd rl o /L.te,vi/ Uc0 a Li .s or /I 4,1
far rA ✓l+ Co 1 c ,+" yj 6-0
z- /1 jc na e-%r
Codi01a' IC (/i'1 .5c- qv' A 5!
rnoL-� r / .2m7L Qii
`711e GUr ePeht" Vcci41/1e. fs,m4 . _e1 ry►.c- knot..) if yGul
4\ c n 4, 5 rr-v r 5 i 011 neAct6 r7 U Gt 4../ti TI'l
i— vow 11a0 e. Cp1't ee r46 ,, jo,.4`I- arl rem a ►Vl.✓1 ev(a )41 ocirS.
PS. -�+ St"re r^re- no Coen alvault1-s 7l'ie., 04-41ef----
Age, you 11e,ed ertI 1 -f .X iliac.% )me- -1 t 1- *o-
oor

WILMINGTON REGIONAL CF Fax :[phone] �� �y J u1 3 '96 10 :01 011X. 01 P. 02�03
Facility Name:
NPDES No.:
Type of Waste:
Facility Status:
Permit Status:
Ste:
Stream
Subbasin:
Regional Office:
Requester:
Date of Request•.
Topo Quad:
FACT SHEET FOR WASTEL QAD ALLOCATION
Occidental Chemical Corporation
NC0003875
10096 Industrial
Existing
Renewal w/ Modification
N.E.-� Fear River
03-06 ,
New Hanover
Wahnington
-Jewett* Powell.
VJ
212T276
Request # 8452
AnaraatalEglaitaa
MS #
Da=
Drainage Area Cmi):
Summer Q(cfs):
Winter 7Q1 (cfs):
Average Flow (cfs):
3):
IV (%):
0210861790
1989
1426
25
90
1800
150
4.6
WasteloadAllocation Summary
(approach taken, v nospondence with region, EPA, etc)
Rased on the �tion figures provided by Occidental, efumt limits were calculated on the
basis of 40 CFR 4 5,172 (Subpart Q).fvr pied don..of sodium dichromate and by- .' ct ,
sodium sulfate and 40 C, R 41 .352 (Subpart Al) for prodacdon.ofclnvmic acid at :..,) tto8 that
also manufacture sodium. dichromate. Taken. collectively, these guidelines stipulate that effluent
pollutant ihaits should be based solely on the amount of sodium diobroinate produced, which►
causes a 21% reducdon in allowable TSS.
Past wasteload allocations and the subsequent permits had carried forward limits from the •
original federal effluent guideline application, ratter than allowing increases for toxicant .
parameters. As a result th.e updaV guideline Calculations Antis waste1oad cause a slight increase
in the limit for hcxavalent chromium and substantial increases in the livaits far total chromium and
nickel. However, the current guidelineinnpo ed limits are well below limits that would bo imposed
on the basis of water quality standards:far eitherof these parameters (leas than half of the water
quality based Hats in both min). The Wriginal:guidelines also included a zinc limit which is not
stipulated by the current guidelines, and the •; , - . effluent levels of zinc aro not neariybigh
enough m jusdt r a limit or conrinuued morn {• g .based on any water = ualityradonale.
In addition, the fealty has =quested a eduction In design flow . •,.. 1.04 to 0.785 MGD.
Toxicants and WET test limits have been; evaluated and adjusted W' y. Please alto note the
addition of stream mordtorlig tequirements.•(from.which the facilitywill be exempt as a
participant in the UNC W Crape Fear River Program,),
Special Schedule Requirements and additional comments from Reviewers:
,V C/Lem, GiiaspG, i✓ .
_ D iff,64'l(
Ct11.JJ4.17ie✓''�� ".JJ4c/GAG i/>idJh
Post it° fax Note
7671

WILMINGTON REGIONAL OF Fax:[phone] Jul 3 '96 10:02 P.02
JUL-0-d'1 b 1D �i rnu" " .�,. .-... _._.._ _ .
2
Reoo ded by;
Reviewed by
inscrcam. Assessment��5 � .�f� v�
Regional Supervisor k C �C Dace: (/4
�o{ ./
Permits & Engineering: 7177-'
RETURN TO TECHNICAL SUPPORT BY.
lalq
TOTAL P.D3

TOXICS/METALS/CONVENTIONAL PARAMETERS
Toxicity Test:
Existing Limit:
Recommended Limit:
Monitoring Schedule:
Chronic (Ceriodaphnia) 24 hr., Quarterly P/F
P/F @ 6.1 (@ 1.04 MGD)
P/F @ 4.6 (@ 0.785 MGD)
Feb., May, Aug., Nov.
Outfall 001 - Process Wastewater
Existing Limits
Flow (MGD):
BOD5 (lbs/day):
TSS (lbs/day):
Hexavalent Chromium (lbs/day):
Total Chromium (lbs/day):
Nickel (lbs/day):
Zinc (lbs/day):
pH (SU):
C-hloride (mg/I):
TN (mg/1):
TP (mg/1):
Recommended Limits
Flow (MGD):
BOD5 (lbs/day):
TSS (lbs/day):
Hexavalent Chromium (lbs/day):
Total Chromium (lbs/day):
Nickel (lbs/day):
Zinc (lbs/day):
Copper (µg/1):
pH (SU):
Chloride (mg/1):
TN (mg/1):
TP (mg/1):
Limits Changes Due To:
Change in 7Q10 data
Updated application of effluent guidelines X TSS, Cr, Ni, Zn
Relocation of discharge
Change in wasteflow X WET test limit
New pretreatment information
Other (onsite toxicity study, interaction, etc.)
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.
Monthly Avg.
1.04
montior
171.6
0.27
1.72
0.94
2.57
monitor
monitor
monitor
Daily Max.
1.04
343.2
0.55
3.44
1.87
5.15
6.0-9.0
Monthly Avg. Daily Max. WQ or EL
0.785 0.785
montior
135.8 300.8
0.31 0.62
2.72 6.02
2.10 0.1-1 4.65 1.q- I
monitor
monitor
monitor
monitor
6.0-9.0
EL
EL
ELI
Parameter(s) Affected
OR

3
Outfall 002 - Sanitary Wastewater
Existing Limits:
Monthly Avg. Daily Max.
Wasteflow (MGD): 0.02
BOD5 (mg/1): 30 45
NH3N (mg/1): monitor
Dissolved Oxygen (mg/1) 5.0
TSS (mg/1): 30 45
Fecal Col. (/100 ml): 200 400
pH (SU): 6.0-9.0
Residual Chlorine (14/1): monitor
Recommended Limits:
RENEW WITH EXISTING LIMITS
Outfall 003 - Auto Rinse Station Wastewater
Existing Limits:
Wasteflow (MGD):
BOD5 (mg/1):
Settleable Solids (ml/1)
Turbidity (NTU):
MBAS (mg/1):
pH (SU):
Recommended Limits:
Monthly Avg. Daily Max.
0.01
monitor quarterly
0.1 0.2
monitor quarterly
monitor quarterly
6.0-9.0
RENEW WITH EXISTING LIMITS
INSTREAM MONITORING REQUIREMENTS
Upstream Location: Nearest accessible point at least 100 yds. upstream of the outfall
Downstream Location: Hwy 117 bridge at Castle Hayne
Parameters: Temp., DO, Conductivity, Salinity
Special instream monitoring locations or monitoring frequencies:

4
MISCELLANEOUS INFORMATION & SPECIAL CONDITIONS
Adequacy of Existing Treatment
Has the facility demonstrated the 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:
If no, why not?
Special Instructions or Conditions
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. Federal effluent guideline limits
2. Toxicity test fact sheet
3. Map of vicinity

EFFLUENT GUIDELINE LIMITATIONS
Occidental Chemical Corporation
NC0003875
Type of Product Produced
Daily Max.
1000 Ibs/day
Mo. Avg.
1000 Ibs/day
Effluent Guideline Reference
Sodium Dichromate Dihydrate
Chromic Acid
683.6
317.14
617.134
240.643
40 CFR 415, Subpart Q
40 CFR 415, Supart Al
Effluent Parameter
EPA Limitations in 40 CFR
(Ibs/1000 Ibs of product)
Effluent Limits
(Ibs/ day)
Comments
Daily Max
30 day avg.
Daily Max
30 day avg.
pH
6.0-9.0
6.0-9.0
6.0-9.0
6.0-9.0
40 CFR 415.172
TSS
0.4400
0.2200
300.784
135.76948
40 CFR 415.172
Hexavalent Chromium
0.0009
0.0005
0.61524
0.308567
40 CFR 415.172
Total Chromium
0.0088
0.0044
6.01568
2.7153896
40 CFR 415.172
Total Nickel
0.0068
0.0034
4.64848
2.0982556
40 CFR 415.172
Note: Subpart Al, pertaining to chromic acid production at facilities which also manufacture sodium dichromate,
states that there shall be no discharge of process wastewater except as provided for in Subpart Q, 40 CFR 415.72.
Subpart Q only provides for allowable pollutant loading for the amount of product, specifically defined as sodium
dichromate, manufactured. Therefore, effluent limitations are calculated solely on the basis of the amount of
sodium dichromate produced.

• Facility Name Ocx,;olerii-a I CA tin 4.ca 1 Corp . Permit # A/CoOOc3(7SPipe # 00/
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 I. G % (defined as treatment two in the North Carolina procedure document). The permit holder shall perform
quarterry monitoring using this procedure to establish compliance with the permit condition. The first test will be
perf9rmed after thirty day's,r from the effective date of this permit during the months of
rem:, flu. I ua�....,, Akw. . Effluent sampling for this testing shall be performed at the NPDES
permitted final effluthn"t 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, DAM 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 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 specified 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 cfs
Permitted Flow 0.715 MGD
IWC //. 4,
Basin & Sub -basin 03-0(0 -A3
Receiving Stream Air . P Fear Rider
County eH) , Ke,)4� r
Recommended by:
QCL PIF Version 9/91

1\
-�s
7pid--// c 1-7'L
/
-fit., (72:
Afte-
d\___DDA___ 0.; 60.3 ZYA A-15C-fr
06 & C 1 74 7 M 6j
/Arad Ar;tA, -waLoa 6 z c
1&, 1-(€0,,) (61 - /(//'
4 ' c ( Ar zd rc
v 4 k
!� iP'fal Cr a y3 172
etv)fit7626 t
//14,0(4 aA)v?°----

,
crit it,
4.-__
or4 ,
t12L .:a , .it ,414)-tul CC,
?.;:4A3 04
,
-7, 3 X "Aqi zyti,tel-iLiTe., --,45p75,44.3
az 1 3 , 7 % , 2k/iir,(4,e4a, ket..effeA4 d,f
1td,G46.14‘ ap,t) 01 -c16y-titz:h. fvyti 4.4iNf„k,
A
(1.t 14"-"--
'Ilt) `:' LI?)k' fAll°4-1 )4)AS 1,714' -LC..1
/
/ :114
/
j
tiOLA / 74 . ileoljtifil
lletk 11 4.41D-4 %U., C451412...kitAt.
i
401 Cb(..
3 tt c:d:ket ei64.,1 15* ...".01.02641-
i' D , 603 in 6 6 ,,y10/ deith,
1
ob40-/ 7-16 41-41i dif..1°-• Zal6"
1
4/10'0 <AgAe---4d:04°V4.9" l'f
Atyci 0 fif .,- _q , 40ezaect ex
4(1- A.) /
A.14 ciffrxt, et7 iwA\IA.0t aAd hied izz-otadat.c.,
- , i , 41: 1 (1:',,i_sef 4.4,,W ,,:-'4-L 001 0 i V 7
-t,qfrZthd€0,,i,e4d
01(/ an U5 (76 -e5.i-, CCeL 7/ (17 Liget
-7'711‘)C z
( ch-f
.
_t, AI - ..-400-112_, ./r1
.
1 :.°‘"1- Cr 4 A da--- aecir 441k-4

orAA, evnl, A 0.
It -
Akd
_2 4-airvrA..tkt
4syttei ,A;(1- :11jtAC1
.a6,41k, ne144C elltaj141
ar-14-togi;
C14 "M. 5,
410 irs;raki

/.304 •rAttrz /{-4'_AJ
44/,71:1-lui
_Girtr-- •
"MS
fjexa
-kfet
Th'(
Cr
g,
=2z
ts.
(715 4166
bqq
0.L1144 / il
6.710
14,Q,01b&r.
6-e-dcw.e,
Am-6,V
/1"zOILP.
-Oe-
GC- .64-C'
-4441,7k,L4

OJe "e
_____4'-_____T5st__acr,5- 716 e.,4,-(i.2-1,24-_,
en,t)-e-fJ 77'
../.,._ ---, 4rfrfi W C-4 ore - ,,
:........,,,
7.4Ar
w------A„.„-----k",„ -,,,,i„,,,„-- --,",
.._
,,,.,,,.. . . .,,,,,iiii,,,Ariaraimpfm...,... 0,..............• _ .
, .,..
,
...
IllAr 4
.kielerrifAtx---64‘ ILkt. ,
c.Lii/P&Lef -/A4 Ailed
I % ,v;v1 41 .,P4Ofe. / Z.a)
- .40
•-kAdt s. 14 44%,
Ze_ Atva4eri
/Alt,)

!
! 1
• (3
0
o 2A4411-: -
CoVIL4Y- . .27.ekl- ActAyt,„
xacktal 0 ,x. 401-4‘tiec..,
"Thiwv_e_, ,1.1.,x(..,,e4--t: ./6owte_,
•--/.6.4 }6-62.0 ayx. ar;s1x,()-c„ ,,,,,z7 .:7,,,a---- pit, ;tricz,
1
. i -
62. (>----ivii .&-tv-eitd 7:•ter.-1.0tm._, a/4-1 Ad
1
- L.6a4 `.`&7, ..-0._..e.--,r. tygo.._
isAyvii &
PI ,e4t. Liatx- mit....?.- .itoz.4 1 .
Jo
-14 "../Nittezij ./17,,,Le
/.-
-illt >&-Ze _ :4)61_,I . „1.4 '; ,-..,/
414.. '..-- ,-- '
( y4L ij:4zeryve.-4-4
. -
'Rapt
.._
4ithd ,f La- z71.: . -•i• _--,
„
YY-t .P4 i ,eryk. , 6ritret
,
& -1.A._'• 'AC, Ap....p44,1yej --4 i 4.1:tW
.}..;;:(
.:,
.
.

Chemical Monitoring Summary Report
Page 1
NORTHEAST CAPE FEAR RIVER @ US HWY117 @ CASTLE HAYNE NC
Station Number: 02108619
STORET Number: B9580000
Water Quality Class: B Sw
Regional Office: Wilmington
Topographic Map:
County: New hanover
Subbasin: 030623
Drainage Area (sq mi): 1426
Average Flow (cfs): 1800
Summer 7Q10 (cfs):
Winter 7Q10 (cfs):
30Q2 (cfs):
Gage: No Gage
® Stream
D Estuary
Ei Lake
® Fish Tissue
Fish Community
• Benthic
Units
STORET NC State
Code Criterion Min Med Max
Beginning Ending
n > Det > Crit Date Date
Dissolved Oxygen
mg/1
00300
4
1.7
5.9
12.5
63
63
7
1/21/88
7/20/93
pH
SU
00400
6 - 9
5.3
6.6
7.3
60
60
5
2/4/88
6/16/93
Conductivity
µMho
00094
N/C
67
139
3741
61
61
0
1/21/88
7/20/93
Chlorophyll a (Corr)
µg/1
32209
N/C
1
1
38
17
2
0
1/21/88
12/16/92
Fecal Coliform. MF
#/100 mi
31616
200
10
19.5
170
55
43
0
1/21/88
7/20/93
Total Phosphorus
mg/1
00665
N/C
0.06
0.11
0.82
35
35
0
1/21/88
7/20/93
Ammonia -Nitrogen
mg/I
00610
N/C
0.03
0.05
0.16
35
35
0
1/21/88
7/20/93
Nitrate/Nitrite-N
mg/1
00630
N/C
0.15
0.44
1
35
35
0
1/21/88
7/20/93
Total Nitrogen
mg/1
00600
N/C
N/S
Turbidity
NTU
00076
50
1.8
3.7
15
35
35
0
1/21/88
7/20/9'
Hardness
mg/1
00900
N/C
12
36
1500
32
32
0
1/21/88
7/20/9_
Total Residue
mg/1
00500
N/C
83
130
3000
47
47
0
1/21/88
3/23/93
Total Suspended Res
mg/I
00530
N/C
1
3
37
62
57
0
1/21/88
7/20/93
Aluminum
µ2/1
01105
N/C
91
400
650
17
17
0
1/30/89
7/20/93
Arsenic
µg/1
01002
50
10
32
0
1/21/88
7/20/93
Cadmium
1..tg/1
01027
2
2
32
0
1/21/88
7/20/93
Chromium
µgll
01034
50
25
32
0
1/21/88
7/20/93
Copper (AL)
14/1
01042
7
2
2.5
41
32
12
2
1/21/88
7/20/93
Iron (AL)
µg/1
01045
1000
240
530
1100
17
17
, 1
1/30/89
7/20/93
Lead
µg/l
01051
25
10
32
0
1/21/88
7/20/93
Mercury
µg/I
71900
0.012
0.2
0.2
0.9
32
1
1
1/21/88
7/20/93
Manganese
µg/I
01055
N/C
10
12
58
13
8
0
1/30/89
7/20/93
Nickel
1101
01067
88
10
32
0
1/21/88
7/20/93
Zinc (AL)
µg/l
01092
50
10
10
13
32
3
0
1/21/88
7/20/93
Abbreviations: n=number of observations; > Det=number of observations greater than the detection limit, > Crit=number of
observations greater than the criterion; N/S=No sample; N/C=No Criteria; AL=Action Level
Notes: Median values are calculated using the detection level for samples classified as below detection. The Median value for
Fecal Coliform is actually the Geometric Mean value. Data includes only surface samples. Samples recorded at less than
detection are considered at the detection level for this summary.
Station Comments:

NORTHEAST CAPE FEAR RIVER @ US HWY117 @ CASTLE HAYNE NC
Page 2 of 2
Summer Summary (April -October):
Dissolved Oxygen (mg/1):
pH (SU):
Total Phosphorus (mg/1):
Ammonia -Nitrogen (mg/1):
Nitrate/Nitrite-Nitrogen (mg/1):
Conductivity (µMho):
Chlorophyll a (Corr) (µg/1):
Total Suspended Residue (mg/1):
Observations
Observs > Det
Median
Maximum
Minimum
35
35
4.5
6.5
1.7
32
32
6.45
7
5.6
21
21
0.11
0.82
0.07
21
21
0.05
0.16
0.03
21
21
0.41
0.56
0.15
33
33
154
507
92
11
1
1
1
1
35
30
3
24
1
Summer Summary (June -September):
Observations
Dissolved Oxygen (mg/1):
pH (SU):
Total Phosphorus (nig/1):
Ammonia -Nitrogen (mg/1):
Nitrate/Nitrite-Nitrogen (mg/1):
Conductivity (µMho):
Chlorophyll a (Corr) (µg/1):
Total Suspended Residue (mg/1):
Yearly Summary :
Dissolved Oxygen
Observs > Det
Median
Maximum
Minimum
20
20
4.1
5.8
1.7
18
18
6.35
6.7
5.7
11
11
0.12
0.82
0.1
11
11
0.04
0.16
0.03
11
11
0.39
0.49
0.17
20
20
164
507
95
4
1
1
1
1
20
17
3
24
1
Year Obs Obs>Det Median
Max
Min
1988
11
11
5.9
12.5
3.6
1989
11
11
6.5
10.1
3.9
1990
13
13
6.2
10.1
3.6
1991
10
10
4.45
8.8
2.4
1992
13
13
6
10.3
1.7
1993
5
5
4.7
7.1
4.4
Conductivity
1988
10
10
172.5
275
120
1989
11
11
144
3741
92
1990
13
13
139
254
80
1991
10
10
142
208
95
1992
13
13
120
293
67
1993
4
4
163.5
507
75
Total Suspended Residue
1988
11
11
6
37
1
1989
11
10
3
17
1
1990
13
12
3
5
1
1991
8
7
4
13
1
1992
13
11
2
24
1
1993
6
6
2.5
3
1
Year
Obs Obs>Det Median Max Min
1988
10
10
6.6
7
6
1989
10
10
6.5
7.2
5.6
1990
13
13
6.7
6.9
6.2
1991
10
10
6.26
6.7
5.7
1992
12
12
6.5
7.3
5.8
1993
5
5
6.5
6.7
5.3
Total Phosphorus
1988
4
4
0.1
0.1
0.06
1989
3
3
0.11
0.12
0.07
1990
4
4
0.11
0.22
0.09
1991
5
5
0.12
0.15
0.1
1992
13
13
0.11
0.82
0.06
1993
6
6
0.1
0.13
0.06
Ammonia -Nitrogen
1988
4
4
0.04
0.08
0.03
1989
3
3
0.11
0.16
0.04
1990
4
4 •
0.04
0.07
0.03
1991
5
5
0.05
0.09
0.03
1992
13
13
0.06
0.16
0.04
1993
6
6
0.07
0.09
0.03

Castle Hayne Ambient
NE CAPE FEAR RIVER @ HWY 117 AT CASTLE HAYNE
STATION #: 02108619
DATE
TEMP
DO
%SAT
BOD5
%SAL
COND
Cu
Hg
Cl-
ChI a
01/21/88
7
12.5
103.0
0.8
136
<10
<0.2
20
<1
02/04/88
9
10.5
90.9
0
132
21
03/02/88
10
9
79.8
0
208
20
04/21/88
15
6.5
64.5
0.7
0
120
<10
<0.2
16
<1
05/26/88
23
5.3
61.8
17
06/22/88
27
4.7
59.0
0
177
26
07/25/88
27
4.5
56.5
1.4
0
154
<10
<0.2
18
<1
09/29/88
23.6
3.6
42.5
0
168
32
10/20/88
17.9
5.9
62.2
0.9
0
207
<10
<0.2
43
<1
11/17/88
16.7
5.4
55.5
0
275
56
12/28/88
9
9
77.9
0
211
44
01/18/89
10.5
9.2
82.5
1.5
3
3741
41
<0.2
1500
01/30/89
10.6
9.3
83.6
1.2
0
245
<10
<0.2
31
<1
03/01/89
9.4
9.7
84.7
169
19
03/28/89
14
7.8
75.7
0
97
11
04/19/89
18
6.5
68.7
1.8
0
92
<2
<0.2
10
<1
05/09/89
20
4.4
48.4
0
113
15
07/10/89
28
3.9
49.8
0
178
21
08/23/89
25
4
48.4
1
118
<2
<0.2
15
<1
10/03/89
21
4.3
48.2
108
16
10/31/89
17.5
6.2
64.8
1
0
184
<2
<0.2
27
<1
12/04/89
9.3
10.1
88.0
144
24
01/04/90
8.1
9.4
79.6
80
1 3
03/07/90
10.8
10.1
91.2
0.2
114
4
<0.2
1 8
<1
03/21/90
18
6.2
65.5
139
19
03/27/90
17
6.8
70.4
128
17
04/23/90
19
6.5
70.1
0.7
124
3
<0.2
17
<1
05/17/90
24
5
59.4
204
26
06/04/90
24
5.8
68.9
111
12
07/05/90
29.4
4.6
60.2
0.7
0
221
<2
<0.2
37
<1
09/06/90
27
3.6
45.2
0
1 1 5
1 7
09/27/90
23
4.1
47.8
218
34
11/01/90
16
5.6
56.8
0.9
254
<2
<0.2
35
<1
11/29/90
13.5
6.7
64.3
178
33
12/19/90
13
8
76.0
198
34
02/15/91
10.4
8.8
78.7
0
97
03/06/91
12.1
7.7
71.6
103
04/17/91
19.8
5
54.8
0.7
0
121
<2
<0.2
1 4
<1
05/16/91
22.9
4.4
51.2
208
33
06/11/91
23.5
4.3
50.6
183
27
07/09/91
29
3.7
48.1
1.3
0
193
4
<0.2
32
<1
08/14/91
25
3
36.3
0
95
1300
Page 1

Castle Hayne Ambient
DATE
TEMP
DO
%SAT
BOD5
%SAL
COND
Cu
Hg
Cl-
ChI a
09/17/91
26.4
2.4
29.8
0
146
22
10/14/91
18.7
4.5
48.2
0.3
0
138
<2
<0.2
21
<1
11/21/91
13.3
6.7
64.0
8
200
29
01/06/92
10.4
8.7
77.8
0
132
20
01/21/92
7.5
10.3
85.9
0.9
0
104
<2
<0.2
16
<1
02/17/92
10
10.2
90.4
0
117
17
02/17/92
10
10.2
90.4
0
117
17
03/30/92
14
8.7
84.4
0
124
<2
<0.2
05/05/92
20.5
6
66.7
0
120
<2
<0.2
06/02/92
22.5
5.1
58.9
0
168
5
0.9
06/29/92
26
4.1
50.5
0
137
<2
<0.2
07/30/92
29
4.1
53.3
0
293
3
<0.2
09/02/92
25
1.7
20.6
0
101
<2
<0.2
09/15/92
24.5
4.1
49.2
0
109
3
<0.2
11/09/92
16.5
5.3
54.3
0
1 9 9
<2
<0.2
12/16/92
9.8
8.2
72.3
0
67
4
<0.2
38
01/21/93
7.9
7.1
59.8
75
<2
<0.2
03/23/93
23
<0.2
04/13/93
17.8
6.5
68.4
0
<2
<0.2
05/20/93
24.1
4.5
53.6
0
167
3
<0.2
06/16/93
28
4.4
56.2
0
160
3
<0.2
07/20/93
31.5
4.7
63.8
0.3
507
2
<0.2
08/30/93
29.3
4.4
57.5
0
270
2
<0.2
10/19/93
21.3
6
67.7
0.2
423
2
<0.2
12/02/93
13.8
7.2
69.6
0.1
224
<2
<0.2
02/24/94
12.1
10
93.0
0.1
140
<2
<0.2
03/16/94
13.3
6.5
62.1
0
97
<2
<0.2
04/14/94
19.9
6.5
71.4
0.1
144
5
<0.2
06/07/94
25.5
5.5
67.2
0
302
5
<0.2
06/22/94
30
4.7
62.2
0.2
405
<2
<0.2
08/02/94
28.6
4.2
54.2
0
294
3
<0.2
08/22/94
27
4.7
59.0
0.1
237
<2
<0.2
09/12/94
24.2
4.2
50.1
0
107
<2
<0.2
10/05/94
23
4.6
53.6
0
135
<2
<0.2
12/05/94
14
6.4
62.1
0
130
5
<0.2
12/29/94
10.1
7.2
64.0
0
114
<2
<0.2
01/09/95
9.1
8.4
72.9
0
100
6
<0.2
02/09/95
5.8
9.6
76.8
0
133
12
<0.2
03/14/95
12.4
7.6
71.2
0
89
2
<0.2
04/18/95
19.7
6.7
73.3
0.1
179
7
<0.2
05/09/95
22.5
5.2
60.1
0.1
285
2
<0.2
06/14/95
23.9
3.6
42.7
1
134
3
<0.2
07/10/95
24.8
4
48.2
0
100
<2
<0.2
09/11/95
23.8
2.9
34.3
0
96
4
<0.2
10/17/95
19
4.3
46.4
0
111
Page 2

WHOLE EFFLUENT TOXICITY TESTING OLSELF-MONITORING SUMMARY) Thu, Jun 13, 1996
Y Pre 1992 Data Available
ArI.ITY REM I
PR
()Ahura 11/11/T1' l'liRM CIIR LIM: 19%, 2.6'1, S1 R1i1. TO ROCKY R.
NC0343532/001 Begin:l/l/95 Frequency: Q l'A' A Jan Apr Jul Oct NunConrp:SINGIJi
Couoty:Startly Region: MKO Subbasin: YAU13
PP:0.50 Special
7Q10: 3.3 IWC(%): 19 Order
Y 02 Pass
93 Pass
94 Pass
95 Pass
96 Pass
-
--
-
-
-
---
-
--
--
-
Pass
Pass
Pass
Pass
Pass
--
-
--
-
••-
--•
-
-
Paas
Pass
Pass
Pass
---
-
-
-
••-
-•
--
-••
Pass
Pass
Pass
Pass
---
--•
••-
•--
---
-•-
-•-
Occidental Clicmlcal Curp/001 PERM CIIR LIM: 6%
y 92 -
Pass
--
--
Pass
-
-
8.50
-
---
8.49
NC0003875/001 Degio:12/1/91 Frequency: Q P/F A Feb May Aug Nov NonComp:
93 -
7.3
-
-
14.7
-
-
18.97
--
---
8.49
--
County:Newllaoover Region: MO Subbasin:CPP23
04 --
16.07
--
-
Late.18.97
-
--
Leta
8.5
---
4,2
e3
PP:1.04 Special
05 3.07
12.7(s)
---
-
Pandinq(s)
•--
127(s)
12.7(s)
---
.-.
5.190(s)
>12
7Q10:25 IWC(%):6 Dace
06 --
>12(s)
--
--
Old Purl IYWTP PERM CIIR LIM: 22%; IP PP 1.2 PERM CIIR LIM 28%
Y 92 -
-
Pass
--
--
Pass
---
--
Pass
---
--•
Late
NC0021229/001 Degin:6/I/95 I quency: Q P/F A Mar Jun Sep Dec I NonCump:SINGI.E
93 Pass
-
Pass
--•
--
Puss
-
---
Pass
- •
•-
Pass
County:McDowell Rcgion:ARO Suhbasin: Cl1330 it
D4 -
-
Pass
---
-
Puss
-
-
I.alo
Pass
••-
Pass
PP: 0.80 Spacial
05 -
--
Pass
---
--
-•
Pass
-
---
Pass
---
Pass
7QI0:4.40 IWC.(%):21.96 Order,
00 -
-
Pass
-
OIYASA/hIaaan Farm PERM CIIR LIM: 90% (New perm 4/1/96)
Y 92 --
Pass(s)
--
---
Pass(s)
--
--
Pass(s)
.-•
--•
Pass(s)
---
NC00252411001 Oegin:9/1/94 Fnsluency: Q P/Ir A Feb May Aug Nov NonComp:SINGI.E
03 ---
Pass(s)
---
--
Pass(s)
-
-
Pass(s)
---
--•
Pass,Pass
---
County:Oauigc Region: KRO Subbasin:CPF06
94 -
Pass
-
--
Pass(s)
-
-
Pass(s)
--
--
Pass(s)
--
PP: 8.0 Special
05 --
Pass(s)
-
-
Pass(s)
-
-
Pass(s)
-
---
Pass(s)
-
7Q10: 1.0 IWC(%):92.54 Order:
06 -
Fai(s)I
-
-
Orford Soutlrslde 12 PERM CIIR I.IM: 90%
02 --
Pass
-
---
Fai
Fail
Fai,Fail
Pass
--
-•
.-•
Pass
NC0025054/001 Begin:2/1/95 Prcquency: Q P/F A Feb May Aug Nov NonCornp:SING13i
93 -
Pass
---
-
Pass
-•
-•-
Pass
--
--•
Pass
--
County:Gnuville Region:RRO Subbasin:TAROI
94 -
Lale,lelo
Fail
Fail
Pass
-
-
Pass
-
•-•
Pass
-
PF:2.17 Special
05 -
Fai
Fail
Puss
Pass
•--
•--
Pass
---
---
Pass
•-•
7Q10: 0.05 IWC(%):98.5 Order:
96 -
Pass
-
--
I'aklank Corp -Wilmington Terminal PERM: 2411R LC50 AC MONIT EPIS 1711D (GRAD) (New pet
92
NC0073172/001 Begin:5/1/94 Frmpuency:5OWD/A NonComp:
03
County:New IWovcr Region: WINO Suhbasin: Cl'F17
94
c.
PP: NA special
95
7Q10: TIDAL IWC(%):NA Order:
98
I'auda-Roscotary Corp. PERM: 24IIR FI'lID AC MONIT IIPIS I.C50 (GRAD)
02 1-1
76.261
63.101
11
>1001
>tOcl
>1001
>1001
>1001
-•-
73.021
--•
NC0079014/001 Begin:6/1/92 Ficqucncy:5OWD/A NonComp:
93 73.461
-
---
--•
••-
-.
---
.-.
---
..-
...
...
ouay:l lalifas Region: RRO Suhbasin: ROA08
94 -
>SO.Of
--
-
...
-
...
-.
-
.--
--
-..
PF:0A538 Special
95 .-
-.-
Fain
--
>1001
-•-
7QI0:0.0. IWC(%):100.0 Order.
06 -
-
80.32
---
Parklon WWTP PERM CIIR LIM: 90%
92 Pass
Pass
-•
Pass
---
--
Pass
•••
.--
Pass
---
--
)4C0026921/001 Ilegin:I/1/95 Frequency: Q P/F G Jan Apr Jul Oct NonComp:SINGI.:
93 Pass
-
-
Fa9.Pass
-
--
Pass
-
-
Faill,Fail
Pass
--
County: Robeson Region: FRO Subbasia:I.UM53
04 Pass
-
-
Late
Pass
---
Pc.ss
---
- -
Pass
-
-
PF:0.2 Special
05 Fail
Pass
--
Fail,Fail
Fail
Pas>
Lain
Pass
---
Fail
Pass
---
7Q10:0.0 IWC(%):100.0 Order
06 Pass
-
-
Pass '
PCS Phosphate Company Inc. Penn: 481u I.C50 ac monil 01u1 or mysid
02 -
-
--
...
..-
...
•-
---
---
---
-_
--
NC0003255/003 Begin:8/1/95 Fiegrency:M NonComp:
93 -
-
-
--• r
-
.--
--.
County:Deaufon Region:WARO Subbasin:TAR07
94 -
-
--
- t
-•
--
---
-
---
-.-
..
.-
P1r: Special
95 -
-
_-
--.
-.-
..'
7Q10: NA 11VC(%): NA Order.
96 Ni
N
N
N
PCS Phosphate Company Inc. Penn: 48hr I.C50 ac munit Ohd or mysid
92 --
-•
--
---
---
.--
--•
-..
N
N
N
N
NC0003255/004 Begin:8/1/95 Ftrquency: M NonComp:
93 N
N
N
N
N
N
N
N
N
N
N
N
Counly:Beaufort Region:WARO Subbasin:TAR07
94 N
N
N
N
N
N
N
N
N
N
N
N
pp, Special
95 N
N
N
N
N
N
N
N
N
N
N
N
7Q10: NA IWC(%):NA Order:
98 N
N
N
N
I'CS Phosphate Company, Inc. Perm: 481tr1.C50acutoniiMid ormysid
92 -
-
-
>100
>100
>100
>100
>100
>100
>100
>100
>100
NC0003255(002 Begin:8/1/95 Frequency: M NonComp:
93 >100
>100
hR
>100
>100
>100
>100
>100
>100
>100
>100,>100/3
>10013,>100
County: Beaufort Region: WARO Suhbasin: TARO7
04 6613,45
>10013,>100
>10013.>100
>100,>100/3
>100/3,>100
>100,>10013
>10013,>100
>10013,>100
>10013,>100
>100
>100
>100
P1:: Spacial
95 >100
>100
>100
>100
>100
>109
>100
>100
>100 .
>100
>100
>100
7010: TIDAI. IWC(%):NA Omen
98 >100
>100
>100
>100
0 2 consecutive failures = signiricanl noncompliance
LEGEND:
PERM = Permit Requircnlenl I.ET = Administrative Letter -Target Frequency = Moniloring frapucncy: Q- Quarterly; M- Monthly; DM- oimonthly; SA- Semiannually; A• Amorally; OWD- Only when discharging; D. Discontinued monitoring requirement; IS- Conducting independent sludy
Resin = lint month required 7Q10 = Receiving stream low Dow criterion (cfa) A = quarterly monitoring increases to monthly upon single failure Months dud testing must occur - es. JAN,A1'R,IUL,OC r NtaiComp = Current Compliance Requirement
I'11=1'cnniucd flow (MGD) IWC% = Instrcam waste concentration PIP =1 ass/Pail chronic lest AC = Acute ' CIIR = Chronic
Ilan Notation: f - Fathead Minnow: • - Ceriodanhnia In.: my - Mvsid shrimp: CIiV - Chronic value; P - Monality of slated perceniaae at blithest concentration; at - Performed by DEM Ton Eval Groom: lx - gad lest
Reporting Nnmaion: --- = Dais not required; NI(- Not 'dinned; ( ) • Beginning of Quarter Facility Activity Slams: 1 - Inactive, N • Newly Issued(l'o cunsimct): I I - Active but nut dim:kluging; 1 Aare 41.11 r available for month in question =ARC sit; nannc needed
36

7000.0
6000.0
ro 5000.0
as
a 4000.0
3000.0 —
2000.0
1000.0 T
0.0
1400
1200
1000 —
✓ • 800 —
`a
a
600 —
400 —
200 —
0 -r
Lillington WWTP
a
a
✓
Swift Textiles
14%
V1
i
8
cc
c
0
0
ACTUAL LOADING (BODu)
Cape Fear River
(1994 Annual Averages)
20%
22%
10%
7% 7%
5% 6%
4% 5%
f i I I I I
6%
16%
0,
10%
O
10%
- 'y0 C
▪ n n CJ
1%
s ;
Elizabethtown
WWTP
3

0 ATE
0 71ki
VoT3
D(.674 ) c.z‘ r
— t3E7 7 - IPec_o f ,(
GhU 7.3%
a
7 X
Lt37--5
-6A
CA Iz._7P
C4V--- /2
Cbga 3.7,
chi 3X
cAU-.=�
-
C�, - Yi
cji
= S7o
4-3 CAC t7L0
51 chi- L.7%
�3 �, ?, sue$

f 6.4
d
2:45.3(a/Wvirt4
Adeboc. “_, (06)077.3 �,t�c i
itfl eftfr -in !'=o 41
Iicole, � / r i* (4uJy i'YlchLK
• e_44'17) ••)110C4 le; ., c40
flpAi/e.I _ ./9/(,.c i&) = f '%, ( ftg/L - /e5s
_ r
d— ' rr__,,
6./ hys .41,..q he_
— 2in f f oyJah' 6k f c, /1ait�F
/S01 � 11 /711PAtilt
i'eSLA '31. 0 ,vtq/ L 0 StrU 9d a _4--->'
cop del 0 1
Cilor(.4e6 - 'lo,.,b/Q
___13D erJed 45f 1I m / L l
�-j_
C_ o_rt-:fi q e C-A for . ,p ft f',zI -
e rlin
` ii S6, n,t
e,
f� F� re-ape/A,.
C-2,1 (ori r' z i i i f -
t.
717q c,\
p
6 t rc.Se d
/lc�!
CA
4,/ -
-�h�t.1ti

Permit Notes 7,% C
Permit No. NC0003875
Occidental Chemical Corporation
New Hanover County
4- /do4e.5 P c5:
b61-14
2/7/96 J. Powell wrote ack letter for application received 2/5/96. Requested SR and WLA.
5/2 Received Staff Report dated 4/18/96.
7/3 Talked with Bob Hollinger of the facility. He states that Salt Cake (Sodium
Sulfate) is a co -product not a by-product. Will specify in the cover letter that the
regulations define Sodium Bichromate as 'product' and that the limits are based on
this, because the facility will receive a reduction in TSS, Hexavalent and Total
Chromium limits.
7/8 Received WLA.
7/9 Drafted Permit.
Changed monitoring frequencies per .0500 regs and made changes to limits per WLA
Sanitary Plant 002 Class II SIC:06003 Industrial Plant 001 Class III SIC: 51104
(refer to WLA for reasons for changes/copy of (F R).
Added Chloride monitoring per WLA.
I will mention in the cover letter that instream monitoring (002) will be waived
because they are a participant in the UNC-W Cape Fear River program.
7/17 Text in WATQ is for renewal with modification (to reduce flow at outfall 001 from
1.04 to 0.785 MGD).
7/31 Steve Pellei reviewed.
To Public Notice 7/17/96 Schedule to issue: 9/2/96.
8/14 Talked with John O'Janpa from the facility. Hewould like to comment and
will send a letter.
8/21 Received comments from Aquatic Tox; made changes to Cond. E.
9/3 Received letter from facility. They are requesting:
1) Reduction in BOD monitoring for outfalls 1 & 2 to 2/month - BOD averages are
2.2 and 2.0 mg/1 and OK with D. Goodrich to change to 2/month.
2) Reduction in Coliform monitoring for outfall 2 to 2/month - coliform average
has been 15.4 and 9.8 for last 2 years, limit = 200, will change back to 2/month.
3) Reduction in copper monitoring for outfall 001- copper monitoring reduced to
quarterly per Jason Doll.

NC0003875
Occidental
NE Cape Fear
C-Swamp
Residual Chlorine
7010 (CFS)
DESIGN FLOW (MGD)
DESIGN FLOW (CFS)
STREAM STD (UG/L)
UPS BACKGROUND LEVE
IWC (%)
Allowable Concentration (
Fecal Limit
Ratio of 806.5 :1
25
0.02
0.031
17.0
0
0.12
13726.68
Ammonia as NH3
(summer)
7010 (CFS)
DESIGN FLOW (MGD)
DESIGN FLOW (CFS)
STREAM STD (MG/L)
UPS BACKGROUND LEVI
IWC (%)
Allowable Concentration
Ammonia as NH3
(winter)
7010 (CFS)
Not Required DESIGN FLOW (MGD)
DESIGN FLOW (CFS)
STREAM STD (MG/L)
UPS BACKGROUND LEVI
IWC (%)
Allowable Concentration
25
0.02
0.031
1.0
0.22
0.12
630.03
90
0.02
0.031
1.8
0.22
0.03
4588.90
10, cklor
-{-vct= . G
Cc 2 DG 1(
1'3.7 '"J
tl (

A. (). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS FINAL Permit No. NC0003875
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to discharge from
outfall(s) serial number 001. Such discharg.:s shall be limited and monitored by the permittee as specified below:
Effluent Characteristics
Flow
BOD, 5 Day, 20 °C
TSS
Hexavalent Chromium,
Total Chromium
Nickel
Zinc
Temperature
Total Nitrogen (NO2+NO3+TKN)
Total Phosphorus
Chronic Toxicity**
kaIday,
Mon. Av.g, Daily MaX
Discharge Limitations
Units
Mon. Avg,
j...04" MGD
12-1- 8 135.t 3_43.2 ?._.,Vv
0.27 . 31 0.55 .
1-7 2 3..44 (` .
0.94 1.87
-2-5�--15
* Sample locations: E - Effluent, I - Influent , . -
monitoring Requirements
(specify) Measurement Sample
Daily Max. Type
Frequency
Continuous
Monthly :"'
Daily" 3/.,A-
Daily
Daily
Daily
--Daily --
Monthly
Quarterly
Quarterly
Quarterly
nr,.ro.i\ u•5 ; ‘c0.. •` i l(1fl•t�s 0 — V At(�l.�J
o-
** Chronic Toxicity (Ceriodaphnia) P/F at,6lo; February, May, August, and November; See Part III, Condition,. 1 •
Lt.(c
*Sample
Location
Recorder 1 or E
Composite E
Composite E
Composite E
Composite E
Composite E
Composite-__ —E- -
Grab E
Composite E
Composite E
Composite E
(..2
4"4". See Part-Il-I; ConditirnrE--
#*** A composite sample may be used if tile sample is analyzed within 24 hours of the first sample portion collected.
The pH shall not be less than 6.0 standard snits nor greater than 9.0 standard units and shall be monitored daily at the effluent by grab sample.
visible foam in other than trace amounts./�k
There shall be no discharge of floating soli . s or
Grc
trit
6,10(.(4)
' (C. 2K1r1
(ANS,c-\.nod CAD 1\ oyS fk.'r
OSCD rs
�
tor k L /
iLmavoicC, M4JI

A. (). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS FINAL Permit No. NC0003875
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to discharge from
outfall(s) serial number 001. (Continued)
Effluent Characteristics
Pollutant Analysis'''*
Discharge Limitations
Other Units (specify)
Km Avg, 1Qally Max M r�Ava. Daily Max,
Lbs/day.
Monitoring
Measurement
Frequency
...Annually
Requirements
Sample *Sample
Type Locat191n
E

A. ( ). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS FINAL
Permit No. NC0003875
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to discharge from
outfall(s) serial number 002. Such discharges shall be limited and monitored by the pennittee as specified below:
Effluent Characteristics
Flow
BOD, 5 day, 20°C
Total Suspended Residue
NH3 as N
Dissolved Oxygen"
Fecal Coliform (geometric mean)
Total Residual Chlorine
Temperature
iWI
Discharge Limitations Monitoring Requirements
Measurement Sample
Monthly Avg. Weekly Avg. Daily Max Frequency Type
0.020 MCD Weekly Instantaneous
30.0 met/1 45.0 mg/I 2LMonth \-A'Nd. Grab
30.0 met/I 45.0 mg/I 2/_Month ,...`c-1d_ Grab
2/Month Grab
Weekly Grab
200.0 /100 ml 400.0 /100 ml 2/Month wV-`? Grab
Pal/ =-/w k Grab
Weekly Grab
''‘ `d 664
.,-4-k.o_ 6 a-t3
* Sample locations: E - Influent, 1 - Influent
14
kAri, rdwrk 0 -
`Sample
Location
I or E
E
E
E
E 0
E
E
E
�<o
** The daily average dissolved oxygen effluent concentration shall not be less than 5.0 mg/l.
The pl-1 shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored 2/month at the effluent by grab
sample.
There shall be no discharge of floating solid ; or visible foam in other than trace amounts.
c Lw ds .0500 c. S

SOC PRIORITY PROJECT: No
To: Permits and Engineering Unit
Water Quality Section
Attention: Mary Cabe
(Review Engineer)
Date: April 28, 1996
NPDES STAFF REPORT AND RECOMMENDATION
County: New Hanover
Permit No. NC0003875
PART I - GENERAL INFORMATION
•
1. Facility and Address: Occidental Chemical Company
Post Office Box 368
Castle Hayne, North Carolina 28429
2. Date of Investigation: April 18, 1996
3. Report Prepared by: Jim Bushardt
4. Persons Contacted and Telephone Number: Bob Hollinger
[phone]
5. Directions to Site: The site is located on Holly Shelter Road
(NCSR 1002) approximately one mile east of Interstate 40.
6. Discharge Points:
Outfall 001 Outfall 002 Outfall 003
Latitude: 34°22'34" 34°22'34" 34°22'14"
Longitude: 77°51'55" 77°51'55" 77°51'43"
U.S.G.S. Quad No: J27SE U.S.G.S. Quad Name: Scotts Hill, NC
7. Site size and expansion area consistent with application ?
Yes
8. Topography: The site terrain varies, but is mostly flat and
the facility is located at 25 feet MSL which is not within the
100 year flood zone.

9. Location of nea2 :st dwelling: Approximately one mile south of
the facility.
10. Receiving stream or affected surface waters: Outfall 001 and
002 discharge to the Northeast Cape Fear River and Outfall 003
discharges to an unnamed tributary to the river.
a. Classification: Class "B swamp" waters
b. River Basin and Subbasin No.: 03 06 23
c. Describe receiving stream features and pertinent
downstream uses: Primary recreation activities and
commercial shipping.,
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. Pertinent Information
a. Volume of wastewater to be permitted:
Outfall 001 - 0.785 MGD (this is a change for reduced flow)
Outfall 002 - 0.020 MGD
Outfall 003 - 0.001 MGD
b. What is the current permitted capacity of the wastewater
treatment facility?
Outfall 001 - 1.04 MGD
Outfall 002 - 0.020 MGD
Outfall 003 - 0.001 MGD
c. Actual treatment capacity of the current facility
(current design capacity)?
Outfall 001 - unknown
Outfall 002 - 0.020 MGD
Outfall 003 - no treatment performed.
d. Dates and construction activities allowed by previous
Authorizations to Construct issued in the previous two
years: None
e. Please provide a description of existing or substantially
constructed wastewater treatment facilities:
Industrial waste streams (Outfall 001) - pH
neutralization, oxidation reduction reaction, physical
separation via gravity with polymers additions, and
pressure filtration.
Sanitary wastewater (Outfall 002) - Dual train secondary
treatment via activated sludge extended aeration and
disinfection.
Automobile wash (Outfall 003) - No treatment
f. Please provide a description of proposed wastewater
treatment facilities: Nothing new is proposed at
present.

g •
Possible toxic impe:ts .to surface waters: Outfall 001 -
chlorides
h. Pretreatment Program: Not a POTW
2. Residuals handling and utilization/disposal scheme: Industrial
residuals are applied into a lagoon via WQ0001492 (no
pathogens). Sanitary plant residuals are land applied via
WQ0004856. These residuals are stabilized for pathogen and
vector attraction reduction by the sludge permittee (C&L
Utilities, 910-371-2770) via lime treatment per 40 CFR, Part
503.
3. Treatment plant classification:
Industrial plant - Class III
Sanitary Plant - Class II
4. SIC Code: 2819, 4952
Wastewater Codes: 84,41,60,61,66,73,22,17,16,02
Main Treatment Unit Code: Industrial plant - 51104
Sanitary plant - 06003
PART III - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction Grant
Funds or are any public monies involved? No
2. Special monitoring or limitations (including toxicity)
requests: None
3. Important SOC, JOC or Compliance Schedule dates: None
4. Alternative Analysis Evaluation: Has the facility evaluated
all of the non -discharge options available? No. Please
provide regional perspective for each option evaluated.
Spray Irrigation: Insufficient land for permitted flow
volume.
Connection to Regional Sewer System: Not available
Subsurface: Insufficient land for flow volume.
Other disposal options: None
5. Other Special Items: None

PART IV - EVALUATION AND RECOMMENDATIONS
This report is being prepared based upon a renewal request by
the Permittee. The Occidental Chemical Company operates an
industrial facility that produces sodium sulfate, sodium bichromate
products, and chromic acid products. The main waste streams are
inorganic and consist of reject residue (part of ore that is not
chromium, such as iron, aluminum, metal hydroxides, and metal
carbonates), and recycle residue (ore that has some or most chrome
removed). Wastestreams are recycled where possible. Additional
wastestreams, identified by the writer, include the following:
stormwater, salt cake scrubber, ore pile runoff, and miscellaneous
floor drains (bichromate liquid containment, fuel containment and
other containment areas), aquifer restoration, boiler blowdown,
cooling tower blowdown, ion exchange water treatment brine
backwash, filter backwash, car wash, and domestic wastewater.
The Permittee has requested a flow decrease for Outfall 001
from 1.04 MGD to 0.785 MGD. The Region concurs with this request.
The current monitoring parameters appear to be adequate for this
facility. However, the current monitoring frequencies for Outfall
001 do not correspond to the requirement of T15A 02B.0500 for a
Class III facility (SIC 2819). The current monitoring frequencies
for Outfall 002 do not correspond to the requirement of 02B.0500
for a Class II facility (SIC 4952). It is recommended that the
monitoring frequencies be modified to meet the requirements of T15A
02B.0500.
It is requested that NPDES Permit No. NC0003875 be drafted
with the requested flow volume change and recommended monitoring
frequency changes and sent to public notice. If no significant
public comments are received, it is recommended that NPDES Permit
NC0003875 be reissued to the Occidental Chemical Company for
operations in New Hanover County in accordance with the basinwide
permitting strategy.
uality Regional Supervisor
ENCLOSURE
JB:OXYCHEM.496
cc: Wilmington Office Files
Central Files
Technical Support Branch
:i
45/';a8
preparer Date
z'4Le 1cg(,
Date
MAY 2 1996
RANCH