NC0003875_Permit (Issuance)_20020415

NPDES DOCUHENT SCANNIN` COVER SHEET
NC0003875
Elementis Chromium 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:
April 15, 2002
This document is printed on reuse paper - igirzore any
content on the re'rerse aside

State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
Michael F. Easley, Governor
William G. Ross, Jr., Secretary
Gregory J. Thorpe, Ph.D., Acting Director
Mr. Gene F. Renzaglia
Occidental Chemical Corporation
5408 Holly Shelter Road
Castle Hayne, North Carolina 28429
ATA
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
April 15, 2002
Subject: Issuance of NPDES Permit NC0003875
Castle Hayne Plant
New Hanover County
Dear Mr. Renzaglia:
Division personnel have reviewed and approved your application for renewal of the subject permit.
Accordingly, we are forwarding the attached NPDES discharge 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 May 9, 1994 (or as subsequently amended). The
following changes have been made from your draft permit:
• Quarterly monitoring for lead, zinc, mercury, selenium, silver, and cadmium was referenced in
the draft cover letter, but inadvertently omitted from the draft permit. These are now included in
the permit. Should monitoring indicate non -detection of any of these parameters after 10-12 samples
have been analyzed, you may petition the Division to remove those monitoring requirements.
• All metals are now expressed as "total." This should not affect your sample analysis as currently
performed.
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 (6714 Mail Service Center, Raleigh,
North Carolina 27699-6714). Unless such demand is made, this decision shall be final and binding.
Please note that this permit is not transferable except after notice to the Division. The Division may require
modification or revocation and reissuance of the permit. 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 governmental permit that may be
required.
If you have any questions concerning this permit, please contact Natalie Sierra at telephone number (919)
733-5083, extension 551.
cc: Central Files
Wilmington Regional Office/Water Quality Section
NPDES Unit
Technical Assistance & Certification Unit
Aquatic Toxicology Unit
EPA Region 4
Sincerely,
Original Signed By
��Goodrich
. Thorpe, Ph.D.
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
An Equal opportunity Affirmative Action Employer
Telephone [phone] FAX [phone]
VISIT US ON THE INTERNET @ htlp://h2o.enr.state.nc.us/NPDES

Permit NC0003875
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT 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
5408 Holly Shelter Road (NCSR 1002)
Northeast of Castle Hayne
New Hanover County
to receiving waters designated as the Northeast Cape Fear River in the Cape Fear
River Basin
in accordance with effluent limitations, monitoring requirements, and other
conditions set forth in Parts I, II, III and IV hereof.
This permit shall become effective May 1, 2002.
This permit and authorization to discharge shall expire at midnight on January 31, 2007.
Signed this day April 15, 2002.
Original Signed By
Qavid A. Goodrich
Gregory J. Thorpe, Ph.D., Acting Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit NC000387 ,..
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 pressure sand filters and optional sulfur
dioxide feed with discharge through outfall 001, and,
2. 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,
3. Discharge from said treatment works at the location specified on the attached
map into the Northeast Cape Fear River, classified B-Swamp waters in the Cape
Fear River Basin

i
Castle Hayne Plant
Outfalls 001, 002
Occidental Chemical Co.
Castle Hayne Plant
State Grid/Ouad:
Latitude:
Longitude:
Receiving Stream:
Stream Class:
J27SE /Mooretown, NC Drainage Basin: Cape Fear River Bali n
34° 22' 34" N Sub -Basin: 03-06-23
77° 51' 55" W
Northeast Cape Fear River
B-Swamp
North
NPDES Permit No. NC0003875
New Hanover County

Permit NC0003875"
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS — FINAL
During the period beginning on the effective date of this permit and lasting until expiration, the Permittee is
authorized to discharge from outfall 001. Such discharges shall be limited and monitored by the Permittee as
specified below:
EFFLUENT
CHARACTERISTICS
.
LIMITS
MONITORING REQUIREMENTS
Monthly Average
Daily Maximum
Measurement
Frequency i
Sample
Type
Sample Location
Flow
0.785 MGD
Continuous
Recording
Influent or Effluent
BOD, 5-day (202C)
Weekly
Composite
Effluent
Total Suspended Solids (TSS)
117.11 Ibs./day
234.22 lbs./day
Weekly
Composite
Effluent
Hexavalent Chromium1
0.27 lbs./day
0.48 Ibs./day
Weekly
Composite
Effluent
Total Chromium
2.34 lbs./day
4.68 Ibs./day
Weekly
Composite
Effluent
Total Nickel
1.81 lbs./day
3.62 lbs./day
Weekly
Composite
Effluent
Temperature (4C)
Weekly
• Grab
Effluent
Total Nitrogen (NO2 + NO3 + TKN)
Quarterly
Composite
Effluent
Total Phosphorus
Quarterly
Composite
Effluent
Chronic Toxicity2
Quarterly
Composite
Effluent
Total Copper
Quarterly
Composite
Effluent
Total Lead3
Quarterly
Composite
Effluent
Total Zinc3
Quarterly
Composite
Effluent
Total Mercury3
Quarterly
Composite
Effluent
Total Selenium3
Quarterly
Composite
Effluent
Total Silveri
Quarterly
Composite
Effluent
Total Cadmium3
Quarterly
Composite
Effluent
Chloride
Weekly
Composite
Effluent
pH4
Weekly
Grab
Effluent
Notes:
1. A composite sample may be used if the sample is analyzed within 24 hours of the first sample
portion collected.
2. Whole Effluent Toxicity (WET) shall be measured by chronic toxicity (Ceriodaphnia dubia)
Pass/Fail at 4.6% - tests shall be conducted in February, May, August and November. See Part
A. (3.) for details.
3. If 10-12 samples result in "non -detects," the facility may petition the Division of Water Quality to
have these monitoring requirements removed.
4. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units.
THERE SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN
TRACE AMOUNTS.

Permit NC0003875
A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS — FINAL
During the period beginning on the effective date of this permit and lasting until expiration. the Permittee is
authorized to discharge from outfall 002. Such discharges shall be limited and monitored by the Permittee as
specified below:
EFFLUENT -
CHARACTERISTICS
LIMITS
MONITORING REQUIREMENTS
Monthly Average
Daily
Maximum
Measurement
Frequency
Sample Type
Sample Location'
Flow
0.020 MGD
Weekly
Instantaneous
Influent or Effluent
BOD, 5-day (20°C)
30.0 mg/L
45.0 mg/L
Weekly
Grab
Effluent
Total Suspended Residue (TSR)
30.0 mg/L
45.0 mg/L
Weekly
Grab
Effluent
Ammonia Nitrogen
,
2/Month
Grab
Effluent
Dissolved 0xygen2
Weekly
Grab
Effluent, Upstream,
Downstream
Fecal Coliform (geometric mean)
200/100 mL
400/ 100 mL
Weekly
Grab
Effluent
Total Residual Chlorine
,
2/Week
Grab
Effluent
Temperature (2C)
Weekly
Grab
Effluent, Upstream,
Downstream
Conductivity
Weekly
Grab
Upstream,
Downstream
Salinity
Weekly
Grab
Upstream,
Downstream
pH3 .
Weekly
Grab
Effluent
Notes:
1. Sample locations: Upstream: Upstream of the outfall (at least 100 yards) at the nearest accessible
point, Downstream: 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.
2. The daily average dissolved oxygen concentration at the effluent shall not be less than 5.0 mg/L.
3. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units.
THERE SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN
TRACE AMOUNTS.

Permit NC000387r5
A. (3.) CHRONIC TOXICITY PASS/FAIL LIMIT (QUARTERLY)
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to
Ceriodaphnia dubia at an effluent concentration of 4.6%.
The permit holder shall perform at a minimum, quarterly monitoring using test procedures outlined in the
"North Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised February 1998, or subsequent
versions or "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or
subsequent versions. The tests will be performed during the months of February. May, August and November.
Effluent sampling for this testing shall be performed at the NPDES permitted final effluent discharge below all
treatment processes.
If the test procedure performed as the first test of any single quarter results in a failure or ChV below the permit
limit, then multiple -concentration testing shall be performed at a minimum, in each of the two following months
as described in "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February
1998) or subsequent versions.
The chronic value for multiple concentration tests will be determined using the geometric mean of the highest
concentration having no detectable impairment of reproduction or survival and the lowest concentration that
does have a detectable impairment of reproduction or survival. The definition of "detectable impairment,"
collection methods, exposure regimes, and further statistical methods are specified in the "North Carolina Phase
II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent versions.
All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge
Monitoring Form (MR-1) for the months in which tests were performed, using the parameter code TGP3B for the
pass/fail results and THP3B for the Chronic Value. Additionally, DWQ Form AT-3 (original) is to be sent to the
following address:
Attention: North Carolina Division of Water Quality
Environmental Sciences Branch
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Environmental Sciences Branch no later than 30
days after the end of the reporting period for which the report is made.
Test data shall be complete, accurate, include all supporting chemical/physical measurements and all
concentration/response data, and be certified by laboratory supervisor and ORC or approved designate
signature. Total residual chlorine of the effluent toxicity sample must be measured and reported if chlorine is
employed for disinfection of the waste stream.
Should there be no discharge of flow from the facility during a month in which toxicity monitoring is required,
the Permittee will complete the information located at the top of the aquatic toxicity (AT) test form indicating the
facility name, permit number, pipe number, county, and the month/year of the report with the notation of "No
Flow" in the comment area of the form. The report shall be submitted to the Environmental Sciences Branch at
the address cited above.
Should the Permittee fail to monitor during a month in which toxicity monitoring is required, monitoring will be
required during the following month.
Should any test data from this monitoring requirement or tests performed by the North Carolina Division of
Water Quality indicate potential impacts to the receiving stream, this permit may be re -opened and modified to
include alternate monitoring requirements or limits.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control organism
survival, minimum control organism reproduction, and appropriate environmental controls, shall constitute an
invalid test and will require immediate follow-up testing to be completed no later than the last day of the month
following the month of the initial monitoring.

Re: comments on NC0003875 - Occidental Chemical
Subject: Re: comments on NC0003875 - Occidental Chemical
Date: Mon, 18 Mar 2002 15:38:12 -0500
From: [e-mail]
To: Natalie Sierra <[e-mail]>
CC: [e-mail], [e-mail],
[e-mail]
Because EPA did miss its deadline for providing official comments on
this draft permit, NC is free to issue this permit as it sees fit.
1 of 1 3/18/02 3:40 PM

AFFIDAVIT OF PUBLICATION iI�7I�
STATE OF NORTH CAROLINA
COUNTY OF NEW P kNOVER
PUBLIC NOTICE
STATE OF
NORTH CAROLINA
standards and regula-
tions, the North Carolina
Environmental Manage-
ment Commission pro-
poses to issue a National
Pollutant Discharge
Elimination System
(NPDES) wastewate dis-
charge permit to the per-
son(s) listed below effec-
tive 45 days from the
publish date of this no-
tice.
Written comments re-
garding the proposed
permit will be accepted
until 30 days after the
publish date of this no-
tice. All comments re-
ceived prior to that date
are considered in the final
determinations regarding
the proposed permit. The
Director of the NC Divi-
sion of Water Quality may
decide to hold a public
meeting for the proposed
permit should the Divi-
sion receive a significant
degree of public interest.
Copies of the draft permit
and other supporting in-
formation on file used to
determine conditions
present in the draft per-
mit are available upon
request and payment of
the costs of reproduction.
Mail comments and/or
requests for information
to the NC Division of Wa-
ter Quality at the above
address or call Ms.
Christie Jackson at (919)
733-5083, extension 538.
Please include the NPDES
permit number (attached)
in any communication.
Interested persons may
also visit the Division of
Water Quality at 512 N.
Salisbury Street, Raleigh,
NC 27604-1148 between
the hours of 8:00 a.m.
and 5:00 p.m. to review
information on file.
NPDES Permit Number
NC0001091. The LaQue
Center for Corrosion
Technology, P.O. Box 654
Wrightsville Beach, NC
28480 has applied for a
permit renewal for a fa-
cility located in New
Hanover County dis-
charging wastewater into
Banks Channel in the
Cape Fear River Basin.
Currently no parameters
are water quality limited.
This discharged may af- MAIL TO:
feet future allocations in
this portion of the re-
ceiving stream.
ENVIRONMENTAL NPDES Permit Number
MANAGEMENT NC0073172, Vopak Wil-
COMMISSION/NPDES UNIT mington Terminal Inc.,
1617 Mail Service Center 2000 W. Loop Suite 2200,
Raleigh, NC 27699-1617 Houston, TX 77027 has
NOTIFICATION OF INTENT applied for a permit re -
TO ISSUE A NPDES newal for a facility lo-
WASTEWATER PERMIT •cated in New Hanover
County discharging
On the basis of thorough wastewater into Cape
staff review and appiica- . Fear River in the Cape
tion of NC General Stat- Fear River Basin. Cur-
ute 143.21, Public law 92- rently no parameters are
500 and other lawful water quality limited. This
discharge may affect fu-
ture allocations in this
portion of the receiving
stream.
NPDES Permit Number
NC0073181 ExxonMobil
Chemical Company, 2000
West Loop South, Ste.,
2200, Houston TX 77008
has applied for a permit
renewal for a facility lo-
cated in New Hanover
discharging wastewater
into Cape Fear River in
the Cape Fear River Ba-
sin. Currently no parame-
ters are water quality
limited. This discharge
may affect future alloca-
tions in this portion of the
receiving stream.
NPDES ' Permit Number
NC0003875, OCCIDENTAL
CHEMICAL CORP. CAST
P.O. Box 368, Castle
Hayne, NC 28249 has ap-
plied for a permit renewal
for a facility located in
New Hanover County dis-
charging treated waste-
water into NORTHEAST
CAPE FEAR River in the
CAPE FEAR River Basin.
Currently fecal coliform
are water quality limited.
This discharge may affect
future allocations in this
portion of the receiving
stream.
NPDES Permit Number
NC003794, Coming, Inc.,
310 North College Road,
Wilmington, NC 28405
has applied for a permit
renewal for a facility lo-
cated in New Hanover
County Discharging un-
treated wastewater into
Spring Branch in the
Cape Fear River Basin.
Curren:ly no parameters
are water quality limited.
This discharge may affect
future allocations in this
portion of the receiving
- stream.
Before the undersigned, a Notary Public of Said County and State,
DIANE P. KEENAN
Who, being duly sworn or affirmed, according to the law, says that he/she is
CLASSIFIED ADVERTISING MANAGER
of THE WILMINGTON STAR -NEWS, INC., a corporation organized and doing business under
the Laws of the State of North Carolina, and publishing a newspaper known as WILMINGTON
MORNING STAR & SUNDAY STAR -NEWS in the City of Wilmington
PUBLIC NOTICE STATE OF NORTH CAROLINA ENVIRONMENTAL MANAGEMENT
COMMISSION/NPDES UNIT 1617 Mail Service Center Raleigh, NC 27699-1617
NOTIFICATION OF INTENT TO ISSUE A NPDES WASTEWATER PERMIT On the basis
of thorough staff review and application of NC
was inserted in the aforesaid newspaper in space, and on dates as follows:
1/12 lx
And at the time of such publication Wilmington Star -News was a newspaper meeting all the
requirements and qualifications prescribed y Sec. No. 1-597 G.S. of N.C.
Title: CLASSIF D ADVER. MGR
re me this % day of
Sworn or affirmed to, and subscribed befo
,A.D.,(-)//'D a
In Testimony hereof, I have hereun , t my hand and affixed my official seal, the day and
year aforesaid.
My commission expires
day of ( J , 20D_C
Notary Public
Jpon reading the aforegoing affidavit with the advertisement thereto annexed it is adjudged by the Court that the said
n was duly and properly made, and that the summons has been duly and legally served on the defendant(s).
day of
Clerk of Superior Court

„r
2— tr 02; 9:42 ;WIL. STAR NEWS
10103432210 w 2/ 7
* 6/
2— S-02: 9:42 ;WI L. STAf NEWS
:0,03432210
AFFIDAVIT OF PUBLICATION
STATE OF NORTH CAROLINA
COUNTY OF NEW HANOVER
Before the undersigned, a Notary Public of Said County and State,
DIANE P. KEENAN
Who, being duly sworn or affirmed, according to the law, says that he/she is
CLASSIFIED ADVERTISING MANAGER
of THE WILMINGTON STAR -NEWS. INC., a corporation organized and doing business under
the Laws of the State of North Carolina. and publishing a newspaper known as WILMINGTON
MORNING STAR & SUNDAY STAR -NEWS in the City of Wilmington
PUBLIC NOTICE STATE OF NORTH CAROLINA ENVIRONMENTAL MANAGEMENT
COMMISSION/NPDES UNIT 1617 Mali Service Center Raleigh, NC 27699-1617
NOTIFICATION OF INTENT TO ISSUE A NPDES WASTEWATER PERMIT On the basis
of thorough staff review and application of NC
was inserted in the aforesaid newspaper in space, and on dates as follows;
1/12 Is
And at the time of such publication Wilmington Star -News was a newspaper meeting all the
requirements and qualifications prescribed by Sec. l' I-597 G.S. of N.C.
Title: CLASS]
Sworn or affirmed to, and subscribed before me this
FEBRUARY A.D. 2002
In Testimony Whereof, I have hereunto set my hand any of
year aforesaid.
;.sd':-.* Notary Public
My commission expires 27TH day of JULY . 20 04
Upon reading the aforegoing affidavit with the advertisement thereto annexed it is adjudged by the Court that the said
publication was duly and properly made. and that the summons has been duly and legally served on the defendant(s).
This day of
MAIL TO:
Clerk of Superior Court
WILMINGTON STAR NEWS 1
'Dram,:
0001486721
Ptias:`.: -'
1
(-::
L9
Phones
[phone]
:Clair:.___ .,:
145
Charges:
$ 0.00
'Aceoprit `
N7335083
StartData:a
01/12/2002
314I1 ice: ;
$ 266.60
:Nome:
N/A,
Stias pate:-?
01/12/2002
'Prayiijeriis:
$ 0.00
Firm: .
Water Quality - NCDENR
Inserfil2ns?'
1
Balance:-
$ 266.60
PUBUC NOTICE
STATE OF
NORTN CAROLINA
ENVIRONMENTAL
MANAGEMENT
COMMISSION/NPDES UNIT
1617 Mall Service Center
Raleigh. NC 27699-1617
NOTIFICATION OF INTENT
TO ISSUE A NPO65
WASTEWATER PERMIT
On the basis of thorough
staff review and applica-
tion Of NC General 5tat-
re 143.21. Public law 92.
500 and other lawful
standards and regula-
tions, the North Carolina
Environmental MenaOe-
nwnt Commission pro-
w to Issue a National
Iluta ti Di System
(NPDEElimination System
Iwastewaterthe dis-
charge permit to the per -
stints) Mica below effec-
tive
45 days fromthe
publish date of this no-
no-
Ce.
Written comments re.
girding the proposed
Anti 130 daysafterafter the
publish date of this no.
Ike. All Cdrrllrlell, r
calved prior to that date
are considered n the final
determinations regarding
the proposed pennll The
Director of the NC Divi-
sion of Water Quality may
decide to hold a public
meeting for the proposed
permit should the OIN-
sten receive a slgNficant
degree of public interest
Copies of the drag permit
and other supporting In-
formation on file used to
determine conditions
present
arelavailable uft pon
request and payment al
the costs of reproduction.
Mail
comments and/or
to ttusNC OMsion o6oWaan-
ter Quality at the atieve
address or thll Ms.
Christie lackmn et (919i
733-5003. extenslan S38.
Please Include the NPDES
permit number lettachndl
In ony communication,
interested persons may
also visit the Division of
Water Cruelty at 512 N.
Salisbury Street. Raleigh.
NC 27604-1148 between
the hours of 8:00 a.m.
and 5:00 p.m. to review
NPDES Permit Number
NC0001091. The 1a0ue
Center for Corrosion
Technology P.0. Box 656
Wrightsville Beach. NC
26480 has applied for a
permit renewal fora fa•
cllity located in New
Hanover County dis-
t-herolne wastewater Into
Baru, Channel in the
Ceps Fear River Basin.
Currently no parameters
. are water quality timitad.
• This discharged may sr.
fact future allocations In
this poraon o/ the re.
calving stream
NPDES Permit Number
N00073172. Week Val-
minngpton Terminal Inc,
200o W. Loop Suite 2200,
Houston. TX 77027 has
applied for a Demet re-
newal for a facility lo.
cated In New Hanover
County discharging
wastewater into Cape
Fear River In the Cape
Fear River Ream. Cur-
rently nil parameters are
water quiet? limited. This
discharge may affect ru-
ture allocatlbnf in this
portion of the receiving
stream.
NPDES Permit Number
NC0073181 exxonteob11
Chemical Company, 2000
Weal Loop South, Ste..
2200. Houston TA 77008
has applied for a permit
renewal fora facility lo-
cated In New HenOver
dlschersin9 wastewater
hero Cabe Fear River In
the Cape Fear River Ba-
sin. Currently no parame-
ters aro water quality
limited. This discharge
may affect future alloca-
tions In this portion of the
receiving stream
NPDES Permit Number
NC 0003875. OCCIDENTAL
CHEMICAL CORP. CAST
P.O. Box 368. Castle
Rayne, NC 28249 has ap-
fplied fora permit renewal
or a facility located in
New Hanover County dis-
charging treated waste-
water Into NORTHEAST
CAPE FEAR River In the
CAPE FEAR River Basin.
Currently fecal collfamn
are water que6ty emited.
This discharge may affect
future allocations in this
portion of the receiving
stream.
NPDES Permit Number
NC003794, Comi0 Northyng. Inc..
Wilmington, ,NC a 8g405
has applied for a permit
renewal for a facility Ire
Gated in New Hanover
County Discharging un-
treated wasteweter into
Serino Branch In the
Cape Fear River Basin.
Currently no parameters
are water quality iMlted.
This discharge may affect
future allocations in NH
portion of the receiving
stream.

OXYCHEM DRAFT NPDES PERMIT NO. NC0003875
Subject: OXYCHEM DRAFT NPDES PERMIT NO. NC0003875
Date: Fri, 18 Jan 2002 09:26:38 -0600
From: [e-mail]
To: [e-mail]
Natalie,
Thank -you for sending me the copy of Oxy's draft permit on January 16, 2002.
As you suggested, I replaced the appropriate pages in the original hard copy
you sent to us on January 9, 2002. The points of clarification we had with
the January 9th version were more than adequately addressed in the version
we received on the 16th. To that end, Occidental Chemical Corporation's
Castle Hayne Plant has "NO COMMENTS" on the Draft NPDES Permit (Permit No.
NC0003875).
I would like to personally thank -you and the Division for recognizing
Occidental's compliance history when drafting our permit. Over the past
years, management and the folks in the plant have continued to work very
hard to insure our operations remain in compliance with all applicable
regulations and permits. More often than not, professionals in our field
bring nothing to the table but bad news and more work. The plant's HES
Department finally has a good story to relate to our employees that their
hard work has paid off. Again, thanks for recognizing that.
One minor point of clarification, you mentioned on the phone when the
comment period closes; if no major issues are raised, the permit will need
to be reviewed by the EPA. You indicated that this process could be slow
and could take a couple of months. I would just like to confirm the
following; the Castle Hayne Plant would continue to run on its old permit
with the monitoring limits and sampling frequencies contained therein, even
though the draft permit says it will become effective on February 1, 2002.
Once again thanks for your help in making this permitting process a
pleasurable exercise. I look forward to working with you again in the
future.
Regards,
Frank
Frank R. Barone
Environmental Supervisor
Castle Hayne Plant
Occidental Chemical Corporation
Phone No. 910-675-7310
Fax No. 910-675-7313
[e-mail]
1 of 1 2/19/02 11:53 AM

Natalie,
There appear
NO0003875
NC0025151
to be no problems with implementation of WET in the following draft permi
Occidental Chemical Corporation
Eden Dry Creek WWTP
Thanks for the opportunity to comment,
Matt
Matt Matthews
NC DENR/Division of Water Quality
Aquatic Toxicology Unit
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
v-[phone]
f-[phone]
MailTo:[e-mail]
1 of 1 2/19/02 11:53 AM

SOC PRIORITY PROJECT: No
To: Permits and Engineering Unit
Water Quality Section
Attention: Natalie Sierra
(Review Engineer)
Date: August 14, 2001
NPDES STAFF REPORT AND RECOMMENDATION
County: New Hanover
Permit No. NC0003875
PART I - GENERAL INFORMATION
af
CD
CV
CD
1. Facility and Address: Occidental Chemical Company
Post Office Box 368
Castle Hayne, North Carolina 28429
2. Date of Investigation: August 1, 2001
3. Report Prepared by: Jim Bushardt
4. Persons Contacted and Telephone Number: Frank Barone
[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
Latitude: 34Deg 22Min 34Sec 34Deg 22Min 34Sec
Longitude: 77Deg 51Min 55Sec 77Deg 51Min 55Sec
U.S.G.S. Quad No:S-53 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 nearest 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
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
Outfall 002 - 0.020 MGD
b. What is the current permitted capacity of the wastewater
treatment facility?
Outfall 001 - 0.785 MGD
Outfall 002 - 0.020 MGD
c. Actual treatment capacity of the current facility
(current design capacity)?
Outfall 001 - unknown
Outfall 002 - 0.020 MGD
d. Dates and construction activities allowed by previous
Authorizations to Construct issued in the previous two
years: July 2001, ATC 003875ACB was issued to allow
installation of a sulfur dioxide chemical feed system to
be used as an alternate reducing agent within the
existing industrial treatment facility.
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.
f. Please provide a description of proposed wastewater
treatment facilities: Nothing new is proposed within.
this application for permit renewal.

g•
Possible toxic impacts to surface waters: Outfall 001 -
chlorides (see priority pollutant analysis).
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
WQ0000783. These residuals are stabilized for pathogen and
vector attraction reduction by the sludge permittee (S&B
Maintenance,Inc.) via lime treatment per 40 CFR, Part 503.
3. Treatment plant classification:
Industrial plant - Physical/Chemical Class I
Sanitary Plant - Biological Class II
4. SIC Code: 2819, 4952
Wastewater Codes: 84,41,60,66,73,22,17,16,02
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. Domestic and industrial
wastewater treatment occurs separately. The industrial treatment
basically reduces hexavalent chromium to trivalent chromium, metals
are precipitated, and chloride content is reduced. Treatment steps
include pH control, oxidation reduction, gravity separation, and
pressure filtration. The liquid portion of the treated waste stream
is discharged to the river. The solids portion of the wastestream
is mixed with alkaline materials to reduce metal mobility and land
applied into a former limestone quarry per Permit No.WQ0001492. 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, and domestic
wastewater.
Chromite ore is received, dried, pulverized, mixed with soda
ash and lime, and heated to 2000 degrees F. which causes the ore to
oxidize. The partially processed material is sprayed with weak
process liquors for leaching and then quenched. The
chemical/physical treatment process begins when the heated slurry
receives sulfuric acid, or sulfur dioxide or spent pickle liquor
(hydrochloric acid) addition to precipitate metals, and pH
neutralized, vacuum filtered, to form sodium chromate liquor (the
leachate). The sodium chromate liquor is acidified to form sodium
bichromate which is concentrated via evaporation and gravity
thickened with polymer aid to form sodium sulfate (the sludge). The
sodium sulfate is washed, centrifuged, dried and stored for sale.
Chromic acid flake is also produced by combining sodium bichromate
solution and sulfuric acid to form a reaction then heated,
agitated, and separated into a lower molten chromic acid layer and
an upper layer of sodium bisulfate. The chromic acid layer is
poured over a cooled flaker to form chromic acid flake.
The effluent monitoring of the industrial waste stream is not
exactly matched to monitoring frequency requirements for Chemical
& Allied Products (SIC 2819, Class I chemical/physical facility),
and effluent monitoring for the domestic wastewater plant is not
exactly matched to requirements for Domestic Wastewater (SIC 4952,
Class II biological facility) per NCAC 2B.0500. The use of the
latest rating sheet required the facility to change from a class
III facility to a double rated facility defined above. In addition,
a permit condition which requires operator certification for
chemical/physical operation, once a certification program is
available, is recommended.

The Occidental Chemical Company participates in the Cape Fear
River Technical Committee monitoring program. Therefore, it is
recommended that upstream and downstream monitoring requirements,
currently imposed on the permit, be continued if the permittee
discontinues participation in the CFR monitoring program. However,
the writer is not aware of monitoring program reports and does not
understand how the Division would be made aware of future
nonparticipation by a member.
Outfall 003 was a car wash discharge that was discontinued
during the last permitting term. The monitoring and limits sheet
and any reference to Outfall 003 should be removed from the permit.
The supplement sheet definition of treatment units for Outfall
001 is recommended to be modified for accuaracy by identifying 4
reactors (not six) and to remove "and clarifiers".
It is requested that NPDES Permit No. NC0003875 be drafted
with consideration given to Regional Office comments 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 permitting renewal terms of the basinwide
permitting strategy.
of t
Water Quality Regional Supervisor
JB:OXYCHEM.801
cc: Wilmington Office Files
Central Files
/47,a1t2vo/
Dat
l -2 OO
Date
nature repo preparer

DENR/DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
NPDES No. NC0003875
Facility Information
Applicant/Facility Name:
Occidental Chemical Corporation — Castle Hayne Plant
Applicant Address:
5408 Holly Shelter Road; Castle Hayne, North Carolina 28249
Facility Address:
5408 Holly Shelter Road; Castle Hayne, North Carolina 28249
Permitted Flow
0.785 MGD (001) and 0.020MGD (002)
Type of Waste:
Industrial (001) and domestic (002)
Facility/Permit Status:
Class I (physical chemical) and Class II (biological)/Active; Renewal
Primary SIC Code: 2819
County:
New Hanover County
Miscellaneous
Receiving Stream:
Northeast Cape
Fear River
Regional Office:
Wilmington (WiRO)
Stream Classification:
B-Swamp
State Grid / USGS Quad:
J27NE/Mooretown,
NC
303(d) Listed?
No
Permit. Writer:
Natalie V. Sierra
Subbasin:
03-06-23
Date:
14November01
Drainage Area (mi2):
1426-:_
.,
001: Lat. 34° 22' 34" N Long.
—
r
77° 51' 55" W
77° 51' 55" W
Summer 7Q10 (cfs)
25
Winter 7Q10 (cfs):
90
30Q2 (cfs)
150
I Average Flow (cfs):
1800
I IWC (%):
4.6
002: Lat. 34° 22' 34" N Long.
BACKGROUND
Occidental Chemical's Castle Hayne plant is the second largest producer of chromium
based chemicals in the world; the major product at the facility is sodium dichromate.
Process wastewater is discharged through outfall 001 and consists of groundwater
remediation water, reject residue from the pH adjustment unit and recycle residue. Domestic
wastewater is discharged through outfall 002; both outfalls discharge to the Northeast Cape Fear
River. Outfall 003, which was used for the discharge of vehicle washwater, was eliminated
during this permit period. Vehicle washwater is now discharged through outfall 001.
Waste sludge is disposed as slurry and sent to a quarry permitted under non -discharge
permit WQ0001492. The domestic sludge is land applied under WQ000783. The facility has
been issued one Authorization to Construct (ATC) in 2001 for the use of sulfur dioxide as an
alternative reducing agent (to reduce the valence state of the chromium in the wastewater)
instead of spent pickle liquor.
Instream Monitoring and Verification of Existing Conditions and DMR Data Review:
This facility discharges to the Northeast Cape Fear River (classified B-Sw) in subbasin
03-06-23. As a member of the Lower Cape Fear monitoring coalition, the instream monitoring
requirements have been waived. There is no appropriate upstream monitoring station on the
Northeast Cape Fear, but data from station NCF117 was used to assess downstream impacts of
the discharge. Available data was culled from the Coalition's water quality reports and shows
most of the monitored parameters (temperature, turbidity, chlorophyll a, BOD, etc.) to be within
acceptable ranges. There are a few data points for fecal coliform that approach or exceed 200
CFU/100 mL, but most data are below 100 CFU/100 mL. BOD and nutrient levels are fairly
low.
Fact Sheet
NPDES NC 0031t75 Renewal
Page 1

The effluent values from outfalls 001 and 002 from the period of January 1999-
September 2001 were analyzed. The data are summarized in the table below. Metals and
toxicants were also analyzed for outfall 001 (see Reasonable potential Analysis).
Outfall 001
Flow (MGD)
Average Value
0.676
Maximum Value
Minimum Value
0.5342
0.7593
BOD (mg/L)
1.38
2.0
Not detected
TSS (lbs./day)
18.26
56.4
0.8
Total Nitrogen (mg/L)
5.98
10.65
2.27
Total Phosphorus
(mg/L)
0.622
3.58
0.05
Chloride (mg/L)
4779.51
5746.95
3692.78
Hexavalent chromium
(lbs. /day)
0.026
0.072
Not detected
Total Chromium
(lbs. /day)
0.104
0.259
Not detected
Copper (µg/L)
Not detected
Not detected
Not detected
Nickel (lbs./da)
0.016
0.019
Not detected
Outfall 002
Average Value
Maximum Value
Minimum Value
Flow (MGD)
0.006
0.009
0.005
BOD (mg/L)
1.90
4.0
1.0
TSS (mg/L)
7.373
19.8
3.2
Ammonia Nitrogen
(mg/L)
0.158
0.92
Not detected
Fecal Coliform (#/ 100
mL)
5.561
48
Not detected
Total Residual
Chlorine (µg/L)
1817.217
5091.44
554.75
Dissolved Oxygen
(mg/L)
8.373
9.15
7.85
Production data for sodium dichromate was also provided as follows:
Correspondence
The Wilmington Regional Office (WiRO) conducted a site visit in conjunction with the
permit renewal. The report, dated August 14, 2001, describes the facility as well maintained.
The treatment works were rated at that time and it was determined that a double rating was
needed since part of the plant treats for domestic waste (Class II biological) and part for the
oxidation of hexavalent chromium (Class I physical/chemical). In addition, the report states that
the monitoring frequencies does not exactly match the requirements stated in the 2B.0400 rules
for the treatment of chemical and allied products and domestic wastewater. Upon further
discussion, it was decided that both plants should be rated as Class II. To correct for errors in
monitoring frequency, the following changes were made at outfall 001:
• TSS monitoring changed from 3/week to weekly
• Hexavalent chromium, total chromium and nickel monitoring changed from daily to
weekly
• Temperature monitoring frequency has been changed from 3/week to weekly
• BOD monitoring has been changed from 2/month to weekly
• pH monitoring has been changed from 3/week to weekly
• Chloride monitoring has been changed from daily to weekly
Fact Sheet
NPDES NC0003875 Renewal
Page 2

There are fewer inconsistencies at outfall 002, which discharges domestic waste. At 002,
BOD and fecal coliform monitoring frequencies were changed form 2/month to weekly. The
monitoring frequency for pH was changed from 3/week to weekly.
The regional office also conducted two compliance inspection reports during the permit
term — both showed the facility to be in compliance and well maintained and operated. The
facility also passed a compliance biomonitoring inspection conducted by the regional office in
1997. Occidental Chemical has received one Notice of Violation (NOV) for a violation of the
fecal coliform daily maximum at outfall 002 (April 1997).
An ATC was issued July 30, 2002 for the use of sulfur dioxide as an alternative reducing
agent instead of spent pickle liquor.
PERMITTING STRATEGY
Waste Load Allocation (WLA):
The Division prepared the last WLA in 1996. At that time, the facility had requested a
flow decrease from 1.04 MGD to 0.785 MGD. Instream monitoring for temperature, dissolved
oxygen (DO), conductivity and salinity were recommended. Effluent limits for flow, TSS,
hexavalent chromium, total chromium, nickel and pH were recommended at outfall 001. The
modeling unit also recommended effluent monitoring of copper, chloride, total nitrogen and total
phosphorus. Outfall 002 had recommended limits on flow, BOD, TSS, fecal coliform and pH
with monitoring for total residual chlorine and ammonia nitrogen. The previous and current
effluent limits were based on guidelines ((40 CFR 415.172 Subpart Q) and water quality
standards. The Division has judged previous parameters and limits to be appropriate for renewal
with some exceptions (see Reasonable Potential Analysis).
Federal Effluent Guidelines:
To determine a number of the effluent limits for the process wastestream, the federal
effluent guidelines for Subpart Q (Sodium Dichromate and Sodium Sulfate Production
Subcategory) were utilized. The guideline limits for total suspended solids (TSS), hexavalent
chromium, chromium, and nickel in terms of pounds per thousand pounds of production. The
Best Practicable Technology (BPT) limitations for dischargers in this subpart (in terms of pounds
per thousand pounds) is as follows:
Pollutant or pollutant
property
TSS
Maximum for any 1 day
(daily maximum)
0.44
Average of 30 consecutive
days (monthly average)
0.22
Hexavalent Chromium
0.00090
0.00050
Total Chromium
0.0088
0.0044
Total Nickel
0.0068
0.0034
. H
Within the ran : e 6.0 to 9.0
The highest production year was 1998, during which time 266.16 tons/day of sodium dichromate
was produced. This translates to 532,320 lbs./day, which yields a multiplication factor of 532.32
1000 lbs. for the limits given in the effluent guidelines. Permit limits result as follows:
Parameter of Concern
TSS
Hexavalent Chromium
Chromium
Nickel
Daily maximum
(lbs./day)
234.22
0.48
4.68
3.62 •
Monthly average
(lbs./day)
117.11
0.27
2.34
1.81
Fact Sheet
NPDES NC0003875 Renewal
Page 3

Water Quality Based Limits:
Based upon North Carolina's water quality criteria— the following table presents the
water quality based limits determined using 7Q10 flow and permitted design flow at 001:
Parameter of Concern
TSS
Total Chromium
Nickel
Monthly average
(lbs./day)
2821.6
7.05
12.41
In this case, therefore, the technology -based limits (effluent guidelines) prove to be more
stringent for TSS, total chromium and nickel. Those limits will be used in the draft permit.
Reasonable Potential Analysis (RPA):
The Division conducted EPA -recommended analyses on effluent data from outfall 001 to
determine the reasonable potential for toxicants to be discharged by this facility, based on two
and a half years of DMR data (1999-September 2001). 002 discharges strictly domestic
wastewater and no toxicant monitoring is performed on this effluent, so it was not included in
this analysis. Calculations for 001 included parameters listed in the previous permit to include:
total chromium, nickel, chloride and copper.
Copper was not detected at all during the time period analyzed, so no reasonable potential
exists for the facility to exceed water quality criteria for copper. Chromium and nickel are
likewise estimated to be present in values below the state water quality criteria. The limits for
chromium and nickel will be based upon the federal effluent guidelines.
Reasonable potential does exist for chloride, but this is an action level pollutant. Given
that the facility has not failed a toxicity test within the life of this permit, a limit for chloride is
not appropriate. Monitoring frequency, however, should increase to weekly.
Primary Pollutant Analysis (PPA):
The PPA submitted by the facility with this renewal application indicates detection of the
following: cadmium, copper, nickel, chloride, aluminum, fluoride, zinc, lead, mercury, selenium,
and silver. Of these, copper, nickel and chloride are already monitored in the current permit.
Aluminum and fluoride are considered ubiquitous and monitoring for these is unnecessary. The
remainder of the compounds shall be monitored quarterly for the term of the permit (lead, zinc,
mercury, selenium, silver and cadmium). The Permittee may wish to monitor these on a monthly
basis to indicate no reasonable potential to violate state water quality criteria — after collecting
10-12 data points, the Permittee may request a minor modification to the permit to reduce or
eliminate the monitoring requirements.
SUMMARY OF PROPOSED CHANGES
In keeping with Division policies, the following will be incorporated into the permit:
• Updated TSS, hexavalent chromium, total chromium and nickel limits based
on new production information.
• Updated process description to include possibility of using sulfur dioxide
instead of spent pickle liquor.
• TSS monitoring changed from 3/week to weekly at 001
• Hexavalent chromium, total chromium and nickel monitoring changed from daily to
weekly at 001
• Temperature monitoring frequency has been changed from 3/week to weekly at 001
Fact Sheet
NPDES NCO0O3575 Renewal
Page 4

• BOD monitoring has been changed from 2/month to weekly for both 001 and 002
• pH monitoring has been changed from 3/week to weekly for both 001 and 002
• Chloride monitoring has been changed from daily to weekly at 001
• Fecal coliform monitoring has been changed from 2/month to weekly at 002
• Quarterly monitoring for lead, zinc, mercury, selenium, silver and cadmium will be
added to outfall 001.
New Weekly Average and Daily Maximum limits are derived from the latest NC/EPA policies
considering lh FAVs and allowable concentrations based on reasonable potential.
PROPOSED SCHEDULE FOR PERMIT ISSUANCE
Draft Permit to Public Notice: December 5, 2001
Permit Scheduled to Issue: February 1, 2002
NPDES DIVISION CONTACT
If you have questions regarding any of the above information or on the attached permit, please contact
Natalie Sierra at [phone] ext. 551.
NAME: DATE:
REGIONAL OFFICE COMMENTS
NAME: DATE:
SUPERVISOR: DATE:
Fact Street
NPDES NC0003875 Renewal
Page 5

Facility Name =
Qw (MGD) =
WWTP Classification
NPDES # =
Receiving Stream
IWC (%) =
Final Results:
Occidental Chemical (001).
0.785
NC0003875
Northeast Cape Fear:]
ver
4.64
Reasonable Potential Summary
Stream Classification
7Q10s (cfs)=
30Q2 (cfs)
Qavg (cfs)
1°
2°
3°
4°
8,
Sw
25;
0...
1800:
Chloride
Max. Pred Cw
Allowable Cw
:Implementation
6628.7 mg/L !Are all reported values less than?
4955.7 mg/L lIs the detection limit acceptable?
No
Yes
Limit?
.;;' Monitor?
No
Yes
!Monitoring
'Frequency Monthly
Chromium
Max. Pred Cw
Allowable Cw
:Implementation
103.1 pg/1 'Are all reported values less than?
1077.3 pg/1 !Is the detection limit acceptable?
No
Yes
Limit?
` : Monitor?
No
Yes
:
'Monitoring
'Frequency Monthly
1
1/2FAVI
:..
1022141_.'1
Nickel
Max. Pred Cw
Allowable Cw
jlmplementation
14.2 µg/1 'Are all reported values less than?
1896.1 g/1 !Is the detection limit acceptable?
Yes
Yes '
Limit?
Monitor?
No
No
' Monitoring
!Frequency None
1
1/2 FAV
: 261.0
pg/l I
1/2 FAV
75.0
1g/1 . , 1
Allowable Cw
1896.1 mg/L :Is the detection limit acceptable?
;:Yes
Monitor?
No
:Frequency None i

Facility Name =
NPDES # =
Qw (MGD) =
7QIos (cfs)=
IWC (%) =
Occidental Chemical (001)
NC0003875
0.785
25
4.64
FINAL RESULTS
Chloride
Max. Pred Cw
Allowable Cw
Allowable #/day
6628.7
4955.7
0.00
RESULTS
Std Dev.
Mean
C.V.
Number
of data points
Mult Factor =
Max. Value
Max. Pred Cw
Allowable Cw
570.5269
4779.5
0.1194
33
1.15
5747.0 mg/L
6628.7 mg/L
4955.7 mg/L
Parameter =
Standard =
Chloride
230A
Date n < Actual Data BDL=1/2DL
Jan-99 1 4740.14 4740.1
Feb-99 2 4393.73 4393.7
Mar-99 3 4955.26 4955.3
Apr-99 4 5454.31 5454.3
May-99 5 5100.09 5100.1
Jun-99 6 4933.63 4933.6
JuI-99 7 5267.6 5267.6
Aug-99 8 5265.29 5265.3
Sep-99 9 3692.78 3692.8
Oct-99 10 5062.28 5062.3
Nov-99 11 5373.4 5373.4
Dec-99 12 5431.57 5431.6
Jan-00 13 5053.81 5053.8
Feb-00 14 4056.35 4056.4
Mar-00 15 5246.27 5246.3
Apr-00 16 5079.63 5079.6
May-00 17 5591.81 5591.8
Jun-00 18 5746.95 5747.0
Ju1-00 19 4982 4982.0
Aug-00 20 5028.08 5028.1
Sep-00 21 4695.84 4695.8
Oct-00 22 5118.56 5118.6
Nov-00 23 4579.89 4579.9
Dec-00 24 3912.83 3912.8
Jan-01 25 4356 4356.0
Feb-01 26 4246.47 4246.5
Mar-01 27 3886 3886.0
Apr-01 28 4023.85 4023.9
May-01 29 5144.63 5144.6
Jun-01 30 4975.6 4975.6
Jul-01 31 4106.09 4106.1
Aug-01 32 3742.95 3743.0
Sep-01 33 4480.15 4480.2
mg/L

Facility Name =
NPDES # =
Qw (MGD) =
7Q10s (cfs)=
1WC (%) _
Occidental Chemical (001)
NC0003875
0.785
25
4.64
FINAL RESULTS
Chromium
Max. Pred Cw
Allowable Cw
103.1
1077.3
RESULTS
Std Dev.
Mean
C.V.
Number
of data points
Mult Factor =
Max. Value
Max. Pred Cw
Allowable Cw
10.0590
12.5
0.8056
33
2.34
44.1 µg/l
103.1 pg/1
1077.3 µg/1
Parameter =
Standard =
Chromium
0.0.
Date n < Actual Data BDL=1/2DL
µg/1
Jan-99 1 9.05280 9.1
Feb-99 2 8.03754 8.0
Mar-99 3 21.70593 21.7
Apr-99 4 31.70532 31.7
May-99 5 37.30884 37.3
Jun-99 6 23.80473 23.8
Jul-99 7 44.11951 44.1
Aug-99 8 32.61460 32.6
Sep-99 9 3.20971 3.2
Oct-99 10 7.13771 7.1
Nov-99 11 5.78707 5.8
Dec-99 12 11.04173 11.0
Jan-00 13 8.82426 8.8
Feb-00 14 8.63862 8.6
Mar-00 15 8.57683 8.6
Apr-00 16 8.57806 8.6
May-00 17 8.94273 8.9
Jun-00 18 2.71560 2.7
Jul-00 19 9.39098 9.4
Aug-00 20 8.99101 9.0
Sep-00 21 8.82556 8.8
Oct-00 22 8.67111 8.7
Nov-00 23 8.17676 8.2
Dec-00 24 8.39664 8.4
Jan-01 25 9.43235 9.4
Feb-01 26 10.53268 10.5
Mar-01 27 9.63085 9.6
Apr-01 28 9.16838 9.2
May-01 29 9.62003 9.6
Jun-01 30 9.34706 9.3
Ju1-01 31 8.90553 8.9
Aug-01 32 9.40572 9.4
Sep-01 33 1.73097 1.7

Facility Name =
NPDES # =
Qw (MGD) =
7Q10s (cfs)=
IWC (%) =
Occidental Chemical (001)
NC0003875
0.785
25
4.64
FINAL RESULTS
Nickel
Max. Pred Cw
Allowable Cw
14.2
1896.1
RESULTS
Std Dev.
Mean
C.V.
Number
of data points
Mult Factor =
Max. Value
Max. Pred Cw
Allowable Cw
1.6753
8.6
0.1958
32
1.27
11.2 pg/1
14.2 pg/1
1896.1 pg/1
Parameter =
Standard =
Nickel
88.0
Date n < Actual Data BDL=1/2DL
Jan-99 1 8.274954 8.3
Feb-99 2 8.037544 8.0
Mar-99 3 8.147871 8.1
Apr-99 4 9.173992 9.2
May-99 5 8.596507 8.6
Jun-99 6 8.152303 8.2
Jul-99 7 8.530455 8.5
Aug-99 8 8.651088 8.7
Sep-99 9 11.222770 11.2
Oct-99 10 7.895698 7.9
Nov-99 11 8.460632 8.5
Dec-99 12 8.735544 8.7
Jan-00 13 8.824262 8.8
Feb-00 14 8.638622 8.6
Mar-00 15 8.576830 8.6
Apr-00 16 8.578057 8.6
May-00 17 8.942726 8.9
Jun-00 18 9.495096 9.5
Ju1-00 19 9.390983 9.4
Aug-00 20 8.991008 9.0
Sep-00 21 8.825561 8.8
Oct-00 22 8.671108 8.7
Nov-00 23 8.176765 8.2
Dec-00 24 3.106758 3.1
Jan-01 25 9.432353 9.4
Feb-01 26 10.532684 10.5
Mar-01 27 9.630850 9.6
Apr-01 28 9.168380 9.2
May-01 29 9.620032 9.6
Jun-01 30 9.347059 9.3
Jul-01 31 8.905532 8.9
Aug-01 32 9.405717 9.4
Sep-01 2.198328 2.2
pg/1

NC0003875 - Occidental Chemical Corporation
New Hanover County
Effluent data review - Average monthly values culled from gkpr
by: Natalie Sierra
11/8/01
Outfall 001
Date Flow BOD TSS Temperature Total N Total P Chloride Hexchrom Total Chrom Copper Nickel
(MGD) (mg/L) (IBs/day) (deg C) (mg/L) (mg/L) (mg/L) (Ibs/day) (Ibs/day) (ug/L) (Ibs/day)
Jan-99
Feb-99
Mar-99
Apr-99
May-99
Jun-99
Jul-99
Aug-99
Sep-99
Oct-99
Nov-99
Dec-99
Jan-00
Feb-00
Mar-00
Apr-00
May-00
Jun-00
JuI-00
Aug-00
Sep-00
Oct-00
Nov-00
Dec-00
Jan-01
Feb-01
Mar-01
Apr-01
May-01
Jun-01
JuI-01
Aug-01
Sep-01
0.7245 1 24.3 19.35 3.36 3.58 4740.14 <0.05 0.0547 <100 <0.1
0.7459 <1 17.1 19.02 4393.73 <0.05 <0.1 <0.1
0.7358 <1 29.5 19.95 4955.26 <0.05 0.1332 <0.1
0.6535 1.5 32.7 24.97 5.2 0.07 5454.31 0.0048 0.1728 <0.1
0.6974 1 34.2 26.25 5100.09 <0.05 0.217 <0.1
0.7354 43.7 30.34 4933.63 <0.05 0.146 <0.1
0.7028 1 50.6 32.42 7.38 0.23 5267.6 <0.05 0.2586 <100 <0.1
0.693 2 27.6 33.3 5265.29 0.0717 0.1885 <0.1
0.5342 17.6 29.45 3692.78 <0.05 0.0143 <0.1
0.7593 1.5 22.3 29.7 10.65 0.87 5062.28 <0.05 0.0452 <100 <0.1
0.7086 1 22.2 24.61 5373.4 <0.05 0.0342 <0.1
0.6863 18.7 21.98 5431.57 <0.05 0.0632 <0.1
0.6794 <1 20.2 19.9 6 0.26 5053.81 <0.05 <0.1 <100 <0.1
0.694 20.1 18.32 4056.35 <0.05 <0.1 <0.1
0.699 1.5 17.3 25.1 5246.27 <0.05 <0.1 <0.1
0.6989 1.5 10.3 26.18 10.41 <0.5 5079.63 <0.05 <0.1 <100 <0.1
0.6704 <1 7.4 30.11 5591.81 <0.05 <0.1 <0.1
0.6314 1 4 33.63 5746.95 0.0028 0.0143 <0.1
0.6384 <1 10 34.4 2.86 0.05 4982 <0.05 <0.1 <100 <0.1
0.6668 <1 1.1 25.32 5028.08 <0.05 <0.1 <0.1
0.6793 <1 6 33.02 4695.84 <0.05 <0.1 <0.1
0.6914 <1 44.9 29.61 2.27 0.16 5118.56 <0.05 <0.1 <100 <0.1
0.7332 <1 56.4 25.9 4579.89 <0.05 <0.1 <0.1
0.714 1 15.5 20.6 3912.83 <0.05 <0.1 0.0185
0.6356 2 3.2 20.61 7.13 0.21 4356 <0.05 <0.1 <100 <0.1
0.5692 <2 0.8 23.6 4246.47 <0.05 <0.1 <0.1
0.6225 <2 3.8 24.31 3886 <0.05 <0.1 <0.1
0.6539 <2 8.8 29.36 4.71 0.17 4023.85 <0.05 <0.1 <100 <0.1
0.6232 <2 11.8 33.68 5144.63 <0.05 <0.1 <0.1
0.6414 2 6.5 37.09 4975.6 <0.05 <0.1 <0.1
0.6732 <2 8.2 37.42 5.89 <0.5 4106.09 <0.05 <0.1 <100 <0.1
0.6374 <2 4 30.72 3742.95 <0.05 <0.1 <0.1
0.6927 <2 1.8 27.44 4480.15 <0.05 0.01 0.0127

Outfall 001
Date Flow TSS
Jan-99
Feb-99
Mar-99
Apr-99
May-99
Jun-99
JuI-99
Aug-99
Sep-99
Oct-99
Nov-99
Dec-99
Jan-00
Feb-00
Mar-00
Apr-00
May-00
Jun-00
JuI-00
Aug-00
Sep-00
Oct-00
Nov-00
Dec-00
Jan-01
Feb-01
Mar-01
Apr-01
May-01
Jun-01
JuI-01
Aug-01
Sep-01
(MGD) (IBs/da
0.7245
0.7459
0.7358
0.6535
0.6974
0.7354
0.7028
0.693
0.5342
0.7593
0.7086
0.6863
0.6794
0.694
0.699
0.6989
0.6704
0.6314
0.6384
0.6668
0.6793
0.6914
0.7332
0.714
0.6356
0.5692
0.6225
0.6539
0.6232
0.6414
0.6732
0.6374
0.6927
Total Chrom Nickel
y) (Ibs/day) (Ibs/day)
24.3
17.1
29.5
32.7
34.2
43.7
50.6
27.6
17.6
22.3
22.2
18.7
20.2
20.1
17.3
10.3
7.4
4
10
1.1
6
44.9
56.4
15.5
3.2
0.8
3.8
8.8
11.8
6.5
8.2
4
1.8
0.0547
<0.1
0.1332
0.1728
0.217
0.146
0.2586
0.1885
0.0143
0.0452
0.0342
0.0632
<0.1
<0.1
<0.1
<0.1
<0.1
0.0143
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
0.01
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
0.0185
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
0.0127
Chloride
(mg/L)
.008275 : ``4740.14:
.008038 < °4393.73
O'008148 .495526
0.009174 5454.31.
008597 5100.09.`
008152 . 4933.63,
0.00853: 5267.6 •
000865:1 52.29.:`
0011223•
3692.78
.007896 , .'5062.28.
'008461 5373 4
� 008736 :'5431.57
•
008824 .: 505381
008639 405635
08577 5246.27
085•
78-5079.fi3
.008943 5591.81:
009495 5746
009391 4!
008991 50280�
008826 469584
08671 511`856
008177 4579.89.
0' 003107 3912.83
0009432 , 4356
0.010533 4246.47
0.009631 3886 ^
0.009168 4023.85
0.00962 5144.63
0.009347•4975 6.
0.008906 4106.09
0.009406 374295
0.002198' 448015

Effluent data review - Average monthly values culled from gkpr
by: Natalie Sierra
11/8/01
Outfall 002
Date
Flow BOD TSS Ammonia-N Fecal Coli TRC DO Temp
(MGD) (mg/L) (Igs/day) (mg/L) (#/100mL) (ug/L) (mg/L) (deg C)
Jan-99
Feb-99
Mar-99
Apr-99
May-99
Jun-99
Jul-99
Aug-99
Sep-99
Oct-99
Nov-99
Dec-99
Jan-00
Feb-00
Mar-00
Apr-00
May-00
Jun-00
Jul-00
Aug-00
Sep-00
Oct-00
Nov-00
Dec-00
Jan-01
Feb-01
Mar-01
Apr-01
May-01
Jun-01
Jul-01
Aug-01
Sep-01
0.0062
0.0053
0.0067
0.0064
0.0057
0.0059
0.0057
0.0067
0.0091
0.0092
0.0055
0.0048
0.0053
0.0054
0.0055
0.0049
0.0052
0.0061
0.0055
0.0053
0.0063
0.0059
0.0058
0.0056
0.006
0.0065
0.0065
0.0054
0.0055
0.0064
0.0063
0.0063
0.0054
4
1
2
<2
<2
<2
<2
<2
<2
<2
1.5
<2
2.33
<2
<2
<2
<2
<2
<2
<2
<2
<2
<2
1.5
<2
<2
1
<2
<2
<2
<2
<2
<2
16.2
14
19.8
15.7
8.4
3.2
5.2
3.5
4.3
3.7
8
7.6
11.6
5.7
11.3
4.9
3.4
3.4
4.1
4.1
6.7
3.4
11.1
6.2
5.7
5.9
5.9
5.6
6.5
8.7
7.8
6
5.7
0.07
<0.1
<0.1
<0.1
0.14
0.14
0.92
0.43
0.2
0.25
0.25
0.2
0.1
0.15
0.1
<0.1
0.1
0.1
0.05
0.05
0.2
0.1
0.1
0.12
0.05
0.05
0.1
0.1
0.15
0.1
0.05
0.1
0.1
32.2
0
12
5.9
1
2
1.7
1.7
0
1.7
6
0
48
1.4
3.5
4.6
29.7
0
0
1.4
0
1.7
0
1.4
1.7
1.4
1.7
0
0
19.7
0
1.4
1.7
967.25
554.75
830.4
1394.125
1556.125
916.7
858
1091.33
1223.11
901.75
620.444
1470
937.5
1710.75
2180.444
2285.75
2210.4
1039.75
1163.444
2448.545
3020.6
1691.266
2740.818
2883.444
1438
1037.125
2342.75
1464.5
1683.9
1987.888
5091.44
4190
4035.875
8.85
9.15
9.04
8.77
8.25
8.08
8.1
8.08
8.1
8.08
8.25
8.47
8.68
8.85
8.6
8.5
8.18
8.1
8.14
8.05
8.15
8.38
8.55
8.57
8.36
8.35
8.62
8.44
8.27
8.12
8.08
7.85
8.25
18.27
16.25
18.32
21.07
22.32
25
25.77
25.66
24.57
22.22
20.24
19.2
18.82
18
19.42
21.45
23.56
25.37
25.36
25.3
24.57
21.3
20.2
17.65
17.92
19.1
17.72
20.48
23.27
24.62
25.48
27.15
24.3

Instream data at Lower Cape Fear monitoring station NCF117 ( downstream of Occidental Chemical outfalls)
-Temperature
Jun-96
Jul-96
Aug-96
Sep-96
0ct-96
Nov-96
Dec-96
Jan-97
Feb-97
Mar-97
Apr-97
May-97
Jun-97
Turbidity TSS pH Conductivity Ammonium Total Nitrogen Total Phosphorus Chlorophyll a BOD5 BOD20 Fecal
(deg C) (NTU) (mg/L) (ug/L) (ug/L) (ug/L) (ug/L) (mg/L) (mg/L) (COL/100mL)
24.5
2.6
1
11
6.8
60
1660
130
1.1
0.5
2.2
49
27.7
4.5
4
30
1710
210
0.6
0.4
3
14
27.5
2.4
3
70
1510
110
0.4
1.3
3.6
63
23.9
9.5
12
140
2360
380
4.2
8.2
8.2
_ 34
19
4.4
2
30
1250
120
2.6
1
3.1
40
14.8
2.5
7
90
1140
130
0.9
1
2.3
47
9.5
4.1
3
5
1370
90
0.6
0.9
1.6
33
12.7
4.2
1
20
1280
100
1.3
0.8
2.5
47
9.8
3.6
1
5
1430
25
1.2
0.7
2.2
20
17.1
6.5
4
10
940
25
2.3
1.2
3.8
113
18.2
4.5
5
60
1040
110
0.7
1.2
3.3
50
19.5
3.2
3
50
1450
80
2
N/A
2.9
27
20.5
6
3.5
40
1140
100
1.8
0.3
1.7
15
JuI-97
28.5
5.3
4
7
7
140
960
130
2.6
0.9
2.5
200
Aug-97
27.7
4.2
3.8
3
6.8
40
1940
130
4
0.8
2.8
22
Sep-97
28.3
4.9
2.7
4
6.9
5
1050
80
8
0.4
1.7
12
0ct-97
23
4.3
no data
3
6.9
30
4580
100
1
1.2
3.4
30
Nov-97
14.3
6.3
4
5
6.6
40
1510
100
0.3
1.1
3.6
22
Dec-97
11.5
7.1
no data
2
no data
5
1050
70
0.2
1.2
3.5
244
Jan-98
9.5
9.4
no data
3
6.2
10
960
40
0.3
0.8
2.2
45
Feb-98
9.6
7.5
8.1
1
5.6
30
1000
80
0.4
0.8
2.6
39
Mar-98
14
7.1
8.7
1
6.3
50
960
90
0.9
0.8
2.9
170
Apr-98
19.7
5.2
6.3
3
6.1
80
890
100
0.9
0.6
3.1
19
May-98
20.7
5
7.3
5
6.5
50
940
100
0.8
0.5
2.4
32

Whole Effluent Toxicity Testing Self -Monitoring Summary
FACILITY REQUIREMENT
October 17, 2001
YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
New Hanover Co. Landfill Penn 24hr p/f ac lint: 90% Rhd 1997 -- Pass Pass H Pass
NC0049743/001 Begin:7/1/1996 Frequency: Q + Mar Jun Sep Dec NonComp: Single 1998 - - Pass - - Pass -- Pass Pass
County. Ncw Hanover Region: WIRO Subbasin: CPFI7 1999 - - Pass - - Pass --- --- Pass - Pass
PF: 0.05 Special 2000 - - NR/Pass - - Pass --- --- Pass NRIPass
7Q10: TIDAL RVC(%):NA Order: 2001 - - Pass -- Pass -- -
New Hanover County Airport WWTP Perm 24hr p/f as lim: 90% 1997 -- - N --- - N - N -- N
NC0081736/001 Begin:7/1/1996 Frcquency: Q + Mar Jun Sep Dec NonComp:Single 1998 -- N --- -- N N -- N
County: New Hanover Region: WIRO Subbasin: CPFI7 1999 -- N -- - N - - N N
PF: 4.0 Special 2000 -- - N - - N - - N - N
7Q10: TIDAL IWC(%):NA Order: 2001 -- - N - - N - -
Newton WWTP Perm chr lint: 56%; upon exp 7.5MGD chr lim 66•/. Y 1997 - - Pass - - Pass - - Pass - - Pass
NC0036196/001 Begin:4/1200I Frequency: Q Mar Jun Sep Dec + NonComp:Single 1998 - - Pass - - Pass - Pass - - Pass
County: Catawba Region: MRO Subbasin: CTB35 1999 - - Pass - - Pass -- Pass - Pass
PF: 5.0 Special 2000 - - Pass - - Pass Pass - NR Pass - Pass
7010: 6.0 IWC(%)5632 Order: 2001 - - Pass - - Pass - -
Norfolk And Western Railway Co. PERM: 24HR LCSO AC MONIT EPIS FTHD (GRAB) 1997 - - - - >100 - -
NC004693 1 /001 Begin:9/1/1993 Frequency: SOWD/A NonComp: 1998 - - - - - >100 -
County: Forsyth Region: WSRO Subbasin: YADO4 1999 - - - - >100 -
PF: VAR Special 2000 - - - - - >100 -
7Q10:0 IWC(%):100 Order: 2001 - - - - - >100 - -
Norfolk Southern Railway Co. Penn chr lint: 29%
NC0029246/01 1 Begin:3/1/2000 Frequency. Q Mar Jun Sep Dec
County. Davidson Region: WSRO Subbasin: YADO4
PF: 0.317 Special
7010: 1.2 IWC(%)29.0 Order:
+ NonComp:Single
✓ 1997 - - Pass - - Pass - - Pass - - Pass
1998 - - Pass - - Pass - Pass - - Pass
1999 - - NRJPass - - Fail Pass - Pass - Fail
2000 Pass - Pass - Fail >90 52 Pass Fail
2001 36.1 73.5 Pass - - Fail 52 52
North Carolina Outward Bound School Perm chr monk: 90°/y beginning 10/12001 chr lim 90%(grab) 1997 - - - - - - - - - - - -
NC0040754/001 Begin:10/12000 Frequency: Q Mar Jun Sep De + NonComp:Single 1998 - - - - -
County: Burke Region: ARO Subbasin: CTB31 1999 - - - - - - - -- - - - -
PF: 0.0075 Special 2000 - - - - - - - - -- .- NR
7Q10: IWC(%):100 Order: 2001 NR NR Pass Fail Fail Pass •-
North Wilkesboro WWTP Perm chr lim: 1.5% 1997 >100 - - NR/>100 - - >100 - >100
NC0020761/001 Begin:5/1/1999 Frequency: Q P/F + Jan Apr Jul Ott + NonComp:Single 1998 >100 - - Bt - - Pau - - Pass
County. Wilkes Region: WSRO Subbasin: YADOI 1999 Pass - - Pass - - NR/Pass - - Pass
PF: 2.0 Special 2000 pass - - Pass - - Pass - - Pass
7010: 196.0 IWC(%):1.5 Order: 2001 Pass - - Pass - - NRIPass
Norwood WWTP Perm chr lim: 2.7%
NC0021628/001 Begin:6/12000 Frequency Q Mar Jun Sep Dec
County. Sternly Region: MRO Subbasin: YADI3
PF: 0.75 Special
7Q 10: 42.0 I W C(%)2.68 Order:
+ NonComp:Single
✓ 1997 - - Pass - - Pass Pass Pass
1998 - - Pass - - Pass Pass -- Pass
1999 - •- Pass -• - et - Pass - - Pass
2000 - -- Pass - Pass - -- Pass - -- Pass
2001 -- - NRPass - Pass - - Pass
Oakboro WWTP Perm chr lim: 19% Y 1997 NR/Pass - Fail Pass -- Pass - Pass
NC0043532/001 Begin:12/1/2000 Frequency: Q Jan Apr Jul Oct + NonComp:Single 1998 Pass - --- Fall Fall Pass Pass Fail
County Stanly Region: MRO Subbasin: YADI3 1999 Pass - - Pass - - Pass -- Pass
PF: 0.5 Special 2000 Fail >76 >76 Pass - - Pass - Pass
7010: 3.3 IWC(%):19 Order: 2001 Pass - - Pass - - Pass
Fail
Pa- ss
Oakboro WWTP Penn chr lim: 4.6%
NC0043532/002 Begin:12/1/2000 Frequency: Q Jan Apr Jul Oct
County. Sternly Region: MRO Subbasin: YADI3
PF: 0.9 Special
7Q10: 29 IWC(%):4.6 Order:
+ NonComp:Single
1997 - -
1998 -- - -- - -
1999 - - -• - - -
2000 - - - -. - - -
2001 - - - - - - Pass
Occidental Chemical Corp/00l 3 Perm chr lim: 4.6% Y 1997 - >12 - - 8.1(5) - - 6.0(s) - >12(s)
NC0003875/001 Begin:11/1/1996 Frequency; Q P/F + Feb May Aug Nov NonComp:Single 1998 - >12(s) - - 6.06(s) - - >12(s) - -- >12(s)
County: New Hanover Region: WIRO Subbasin: CPF23 1999 - 6.1 - - 9.7(a) - - >12(s) - >12
PF: 0.785 Special 2000 - 9.8 - - 9.8(a) - - 6.1(s) - 9.8(s)
7Q10: 25 IWC(%):4.6 Order: 2001 - 6.07 - - 9.8 - - 9.8(s)
Y Pre 1997 Data Available
- ate 1 Ault `icS� IS iti?6,.5.
LEGEND: (0 S1' `r sa_ovp \e - r‘O 1/YbJ 1 `'z)v c.
PERM = Permit Requirement LET = Administrative Leiter - Target Frequency - Monitoring frequency. Q- Quarterly; M- Monthly, BM- Bimonthly; SA- Semiannually; A- Annually; OWD- Only when discharging; D- Discontinued monitoring requirement `V
ACC- b l it:' )
Begin = First month required 7Q10 = Receiving stream low flow ttiterion (cfs) + quarterly monitoring increases to monthly upon failure or NR Months that testing must occur- ex. Jan, Apr, Jul, Oct NonComp - Current Compliance Requirement
PF = Permitted flow (MGD) IWC%= Insream waste concentration P/F Pass/Fail test AC = Acute CHR = Chronic
Data Notation: f • Fathead Minnow; • - Ceriodaplmia sp.; my - Mysid shrimp; ChV • Chronic value; P • Mortality of stated percentage at highest concentration; at - Performed by DWQ Aqualic Tox Unit; bt - Bad test
Reporting Notation: -- - Data not required; NR - Not reported Facility Activity Status: 1 - Inactive. N - Newly Issued(Fo construct); H - Active but not discharging; t-More data available for month in question; • = ORC signature needed
34

`V__AWL-
‘Aai\Aatvrc- ialvtiL
ad-
orxi pas RiaANA.,f;,ta.rts,. .4.,LA,\.ei .Q041- ibuyv2A,30,_o_
tab- CAPE-c \-r e.1 C
C)o\ ?hocs u�J
co I L
¥% e) . NJ o
C ujoia C& �e c � Cu.fi 1
diii-ociLL0Licpev, law
(&'1L
N C0oog.q5
cebs
Pastip C# N(t-5',
p liza/4
zaaiki
74,4 • A 1 C: 00 3c(.
7ss -e_.). -7(30'
ZCY Z Q ?
T) � � (pcp ,alp J� �Ocw
200
?,?A' cc\ �C��, C�) gb)
Teei+ eUm.
Ni Ce
n
4.
-- I I(Ch10 c4 c;-4-1- .(CV

c� c Cc) '%,-1 f
./0,--e1,1 tad „Aa 44,yhtt
e/y4171iia .41&0/ezeai 6-c-e-1/co
` don. M (pc t/J' 2 </�s s 2,
-10,ci (ity is cJai-e c i
^j U 1G1 �S 1 I
0/1
v� L f .virai-V_)5
�f
[ al
talk) >c.,) SZ. ez
u{CL 4-Ts\S
od i .00.2
C'v ye ti--CAtAN 3 f -N 06
-7` 3o 10) -A -F-t-
60a) ri Cp. .-P_Q_A)-N-± LLaiu,LA) CE-C;1_ Klc_ _ 1c\ 9. (9
f ,���
0 Cat kCIA'r -4- \r-c),Sca *In
co - t \•if i C-'
Vim- Uk-:- r- N\ (�
u .e,1/x,; tiA/ f
}TP

COI
�lac� C i S i/ s C(6 <=
cnz 4-(11-04 APki
.. �pri,J C.o3 r rtq -c
\i cry CO V,. u,
41)1 ivk'S Lib W._ `4 I'. C L4 6
OD 1 o p, be 5� liDocm f kioc)�cfi' 0
o,co\--( 0
boS 4 n OO(b
rCDC ` f zc(a I I
53R 9Dtz c) ‘Wd
\--tur-i2t.A vck,lvea 53 a_3 D-

APPENDIX A
DATA AND METHODOLOGIES USED FOR
PERMIT DEVELOPMENT
TECH -BASED EFFLUENT LIMITSSPREADSHEET
BOD5 MONTHLY AVERAGE/DAILY MAXIMUM RATIO CALCULATION
COD LIMITS CALCULATION SPREADSHEET
COD MONTHLY AVERAGE/DAILY MAXIMUM RATIO CALCULATION
OCPSF LIMITS SPREADSHEET
WHOLE -EFFLUENT TOXIVITY DATA
EFFLUENT MONTHLY AVERAGE DAT1998-2000)
VERIFICATION OF INSTREAM WASTE CONCENTRATION\(IWC) SPREADSHEET
APRIL 10, 1995 MEMORANDUM DISCUSSING WASTELOAD ALLOCATION FOR
MONSANTO COMPANY (NC0003719)
Fact Sheet
NPDES NC0003719 Renewal
Page 6

fLQ
z'
Cc\)Cr L
A-1
1- bei
Shov le) \vtel
vizit-icv
e S.
S 3
Ca AJc

Re: Oxy Chem
Subject: Re: Oxy Chem
Date: Mon, 26 Nov 2001 14:05:41 -0500
From: Jim Bushardt <[e-mail]>
To: Natalie Sierra <[e-mail]>
Well, you know- it's probably OK to rank oxychem's industrial wastestream
treatment train (outfall 001) as a class II chemical/physical. They are
feeding polymers to assist physical separation which should meet the
requirements of class II chem/phy. I don't think that anyone at OXY will
be concerned about being rated a class II chem/phy....JB let me know
if you want another rating sheet.
Natalie Sierra wrote:
> Hey Jim-
> In your most recent staff report for Oxy Chem, you state that for 001 -
> the process wastewater - the system should be categorized as Class I
> phys/chem. I'd really like to put it at class II due to the flow
> (considered a major by NC) and the noxious nature of the industry
> itself. What do you think?
> -Natalie
DJim.Bushardt.vcf
Name: Jim.Bushardt.vcf
Type: VCard (text/x-vcard)
Encoding: 7bit
Description: Card for Jim Bushardt
1 of 1 11/26/01 2:09 PM

•
•
•
FACILITY & PROCESS DESCRIPTION
The Castle Hayne plant is part of Occidental Chemical Corporation's Specialty Business Group.
The facility employs approximately 294 personnel, 204 of which are Occidental Chemical
employees, and the remainder of which are contract personnel. Production operations are
conducted on a 24 hour per day, seven day per week basis.
The Castle Hayne plant is the second largest producer of chromium based chemicals in the world.
The facility's principle products include sodium bichromate, in either solution or solid form,
chromic acid, and sodium sulfate.
The manufacturing process begins with the delivery of chromite ore to the plant. The ore is
unloaded onto a belt conveyor system which feeds an oil -fired, co -current rotary dryer. The dried
ore is pneumatically conveyed to a storage silo, then transferred to ball mills for pulverization.
The ground ore is then continuously proportioned with soda ash, lime, and dried recycle residue
to form the kiln feed (mix).
The mix is fed to one of three roasting kilns via a series of screw conveyors where it is heated to
2000 degrees Fahrenheit. During the roasting process, the ground ore is oxidized in the presence
of the alkaline materials contained in the mix. The kiln product is called the roast and contains
mostly sodium chromate and some impurities, primarily ferrous and aluminum materials.
Upon discharge from the kilns, the roast is sprayed with weak process liquors for leaching
purposes. The roast then drops into quench tanks where the soluble sodium chromate is leached.
The insoluble material that settles out of the quench slurry is called residue. This residue is
filtered, dried, and recycled to the kilns as a raw material.
The Quench slurry is pumped to the neutralization process where sulfuric acid is added to lower
the pH and to initiate the precipitation of aluminum. After neutralization, the slurry is sent to a
vacuum filter where the leachate is separated from the solids for the removal of impurities. The
resulting yellow filtrate is sodium chromate liquor. The chromate liquor is converted to sodium
bichromate by means of acidification. The sodium bichromate liquor is concentrated in a series
of vacuum evaporators and then pumped to a settling tank where sodium sulfate, a co -product,
settles out. A portion of the sodium sulfate produced is then washed, centrifuged, dried and sent
to storage for shipment and sale. The other portion of this material is sent to a neighboring
facility, U.S. Filter Inc., for further processing, storage, and shipment.
OCC - CASTLE HAYNE PLANT SPCC 6

e
o
FACILITY & PROCESS DESCRIPTION
The concentrated sodium bichromate solution is thensent to one of three areas; a continuous
crystallizer, the tank farm for liquor sales, or the chromic acid plant.
A continuous vacuum crystallizer is used to produce a slurry stream that is pumped to a
centrifuge where the sodium bichromate crystals are separated from the is thenr. The c d� ee
re
then dried and cooled prior to storage. The finished crystal productbagged
for shipment.
Upon entering the chromic acid plant, sodium bichromate solution and sulfuric acid are
combined in a titanium reactor which results in the formation of crude chromic acid slurry. This
material is then filtered prior to being •fed to a melter. In the melter, the crude chromic acid
crystals are heated, agitated, melted, and separated into a lower molten chromic acid layer and an
upper sodium bisulfate layer. The molten chronic acid is drawn off and poured over a water
cooled flaker where the molten chromic acid is cooled and solidified. The finished chromic acid
flake can then be packaged in sparger cars, tote bins, or drums.
OCC - CASTLE HAYNE PLANT SPCC 7

tdvi4k
oxY Chromium Chemicals Process Schematic qy
0 p BALL MILL
ORE
WATER
DRYER
QUENCH TANK
CHROMIC
ACID
REACTOR
ACIDIFIER
PULVERIZED ORE1
BLOW TANKS
NEUTRALIZERS
FILTER
FILTER
LIMI
SODA ASH
RECYCLE RESIDUE
IIYDROCLONES
BELT FILTERS
�) O'.
REJECT
I FILTER
CALCIUM
PRECIPITATOR
r O FLASH
MULTIPLE I DRYER
SALT CAKE
EFFECT CENTRIFUGE ►
MELTER EVAPORATO 85%
SYSTEM EVAPORATOR ►��
►
CRYSTAL
SODIUM BICHROMATI
LIQUID PRODUCTS
PICKLE
LIQUOR
WASTE WATER
TREATMENT TREATED
REACTOR
EFFLUENT
CHLORIDE TO RIVER
REMOVAL
SYSTEM
TREATF, SIDUE
PURIFICATION
CENTRIFUGE
DRYER
CRYSTALLIZER
COOLER
SSA
PRODUCT
SODIUM BICHROMAT
CRYSTAL PRODUCTS

gd
PL cD UT;)ic; L_ `71277117—
( Nadi ekao )
(7c- crit Fcal 4 c.)
7hP/n 2 pit/
`Om?, 7//20,/ /i207/(//za
avii/4(h Acto ////ix v
hiek7 a_
j4(6/2/44e7I-a

(-72
/T7/,
61Al /um,.lin�3
Cerp3
pX� cct
jj
1
gthx

OxyChemo
CERTIFIED MAIL — 7099 3220 0007 9005 1493
RETURN RECEIPT REQUESTED
August 01, 2001
Mr. Charles H. Weaver, Jr.
NCDENR
Division of Water Quality — NPDES Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
RE: NPDES Request for Permit Renewal
NPDES Permit Number NC0003875
Occidental Chemical Corporation, Castle Hayne Plant
Castle Hayne, NC, New Hanover County
Dear Mr. Weaver:
Responsible Care
A Public Commitment
Enclosed please find the original and two copies of the completed NPDES Application Standard Form C for renewal
of this facility's NPDES permit, permit No. NC0003875. Our current permit expires at midnight on January 31,
2002.
Since we received our last permit, which was issued in September 1996, the facility has undergone one
modification. This modification involved the elimination of an outfall. Formal documentation of this modification
is also attached. (See copy of enclosed letter dated October 01, 2000 addressed to Mr. Gene F. Renzaglia from Mr.
Kerr T. Stevens)
Also enclosed, please find a copy of the letter formally documenting Gene F. Renzaglia's signatory authority for the
purposes of signing applications and reports submitted to the Permit Issuing Authority as described in Part II.B.11.a
and in Part II.B.11.b of our existing NPDES permit. (See copy of enclosed letter dated May 31, 2001 addressed to
Mr. Kerr T. Stevens from Mr. Craig W. Hull)
The facility's sludge management plan has been revised and has been included as Appendix C to the completed
form C application.
As noted in your letter dated June 20, 2001, a permit renewal fee is not required with our application package.
If you have any questions or concems regarding our request for renewal, please do not hesitate to contact Mr. Frank
R. Barone at 910-675-7310 or Mr. John O'Janpa at 910-675-7249.
Sincerely,
Gene F. Renzaglia
Plant Manager
Occidental Chemical Corporation
Enclosures
cc: Mr. Rick Shiver — NCDENR WRO
Occidental Chemical Corporation
(1% 5408 Holly Shelter Road, P.O. Box 368, Castle Hayne. North Carolina 28429
910/675-7200 FAX: [phone]
Carolina Star Site

Narrative Description of Industrial Wastewater Treatment Components
Wastewater slurry from the production neutralization area enters the wastewater
treatment process via the 500 gallon premix tank. Pickle liquor (ferrous chloride
reducing agent) is added to begin the reduction of hexavalent chromium to trivalent
chromium. From the premix tank the pre-treated slurry goes to the 80,000 gallon
waste collection tank.
Wastewater slurry from the production recycle area enters the wastewater treatment
process via the 80,000 gallon waste collection tank.
Wastewater slurry is pumped from the waste collection tank to one of three 24,000
gallon reactors. Pickle liquor is added to the reactor to complete the reduction of
hexavalent chromium to trivalent chromium. When the reduction is complete, lime
slurry is added to the reactor to raise the pH so that chromium, iron, and other metals
will precipitate from the treated wastewater solution.
Contaminated water wastes from recovery wells, containment areas, production area
sumps etc. enter the wastewater treatment process via the 10,000 gallon sump surge
tank. The sump surge tank is pumped to the 12,000 gallon water batch reactor. Pickle
liquor is added to the reactor to reduce the hexavalent chromium to trivalent
chromium. When the reduction is complete, lime slurry is added to raise the pH, to
precipitate metals.
All four reactors are pumped to the 103,000 gallon treatment surge tank. This tank
allows a continuous feed of the treated wastewater batches into the chloride removal
(countercurrent washing) circuit.
The treatment surge tank is pumped to the 4,700 gallon feed reslurry tank. This feed
reslurry tank is the starting point for two parallel washing circuits. One circuit washes
soluble solids from light solids. The other circuit washes soluble solids from heavy
solids.
The light circuit has three 95,000 gallon clarifiers, and two 3,200 gallon light reslurry
tanks.
The heavies circuit has three hydroclones, and two 1,100 gallon light reslurry tanks.
Both washing circuits wash soluble solids away from the insoluble solids. The liquid
proceeds from three to two to one and eventually becomes the effluent to the river,
while the washed residual solids go from one to two to three and eventually to a
surface impoundment.
The underflows (residual solids) from the third stage washing circuits enters the 3,950
gallon sludge hold tank. Crushed limestone is added to the treated waste slurry in the
sludge hold tank to decrease the solubility and mobility of metals in the residual
solids.

The treated slurry is then pumped to the 10,000 gallon sludge retention tank where
either river water, or quarry return water is added for transport to the surface
impoundment. The residual solids are deposited in the surface impoundment.
The liquid overflow from the first stage clarifier goes to the 10,000 gallon overflow
tank. The overflow tank feeds one of the three, eleven foot diameter, 800 GPM capacity
sand filters. The polished water from the sand filters is the 001 effluent to the river.

Narrative Description of Domestic Wastewater Treatment Components
Domestic wastewater from showers, sinks, and restrooms enter the wastewater treatment
process via the 5,000 gallon equalization tank. The equalization tank is continuously aerated.
The flow from the equalization tank is split and pumped to two parallel extended aeration
package plants. Each plant has 10,000 GPD treatment capacity.
Plant one has two 5,000 gallon aeration compartments, while Plant two has one 10,000 gallon
aeration compartment, but the operation is essentially the same. The treatment units have five
blowers. One is used for the equalization tank. Two are used for the aeration compartments and
air lifts, and two are spares.
The flow proceeds from the aeration compartments to the clarifiers. The overflow from the
clarifiers feed tablet chlorinators. Each plant has a chlorine contact tank sized to provide a
minimum of thirty minutes contact time at 10,000 gallon per day.
Wasted sludge is sent to a digester for further aeration. Plant one has a 1,500 gallon digester and
Plant two has a 3,000 gallon digester.
Digested sludge has lime added for vector control and is landfarmed by S&B Maintenance.
A 3.0 liter diesel backup generator kicks in automatically during power interruptions, and
supplies electricity to operate the treatment plants, pumps, lights, etc.

Sludge Management Plan
Revision Five, September 12, 2000
Prepared by: John O'Janpa
The sludge generated in the industrwastewater treatment process is sent as a slurry to the
"quarry" which is permitted (WQ0001492) for the surface disposal of residual solids.
The requirements are spelled out in the permit. They include maintaining two feet of freeboard,
monitoring the waste using the TCLP test, and maintaining inspection logs etc.
The sludge generated from the domestic wastewater treatment process is removed for land
application at a permitted site (WQ000783) by S&B Maintenance. Vector control is accomplished
by having S&B Maintenance add lime to the truckload of sludge, and follow the DENR
procedure to maintain a high pH prior to Land Application.
Annual samples of the sludge are collected and analyzed as required by S&B Maintenance's
Permit.
Most year's, 8,000 to 12,000 gallon of sludge is removed.

Birchromate (Dichromate, Na2 Cr207) Production data, by year.
Units are in tons/day.
1998 266.16
1999 244.97
2000 231.70

CERTIFIED MAIL RECEIPT # 7099 3220 0007 9005 2988
OxyChemo
November 21, 2000
RETURN RECEIPT REQUESTED 4
Responsible Care*
A Public Commitmenty
1David Goodrich
North Carolina Department of Environment and Natural ResourcKV 3 0 2000
Division of Water Quality
1313 Mail Service Center
Raleigh, NC 27699-1617
Subject: NPDES Permit Modification
Permit Number NC0003875
Occidental Chemical Corporation
Castle Hayne Plant
New Hanover County
Dear Mr. Goodrich:
Pursuant to your telephone conversation with John O'Janpa on November 7th, this letter
constitutes a request for a permit modification to use sulfur dioxide as a reducing agent at
the wastewater treatment facility. The purpose for utilizing sulfur dioxide is that the
supply of pickle liquor, the current reducing agent, has become increasingly erratic. This
has placed an urgency on utilizing an alternative reducing agent at the plant. Sulfur
dioxide addition at the wastewater treatment area will provide the necessary flexibility in
order to maintain overall production requirements at the Occidental Chemical facility.
Sulfur dioxide addition will not result in any increase in production capacity and will not
affect current permit limits and monitoring requirements for outfalls 001 and 002F This
modification will provide potential environmental benefits by reducing the amounts of
treated residue, total dissolved solids, and metals during the treatment process. Attached
is a narrative description and an accompanying drawing of the sulfur dioxide addition
system.
As Mr. O'Janpa indicated, we would greatly appreciate your immediate attention on this
matter as this project is time sensitive. If you have any questions or need additional
information concerning this request for permit modification, please contact me at
[phone] or Robert Hollinger at [phone].
Sincerely,
2
ene F. Renzaglia
Plant Manager
Occidental Chemical Corporation
112010D --r am -m s-,e,tE ftO, I
f�FF ki t—A- C I Ll -j P tS
i"lk Occidental Chemical Corporation Arc-R542-7k11S Carolina Star Sit el\
O` j 5408 Holly Shelter Road, P.O. Box 368. Castle Hayne, North Carolina 28429
910/675-7200 FAX: [phone] --,__, _

Proposed Sulfur Dioxide Addition System
The plant currently utilizes spent pickle liquor to reduce the valence of the chromium in.
the plant wastewater stream from the hexavalent valence state to the trivalent state. This
is a requirement of our NPDES wastewater permit, NC0003875. Spent pickle liquor is
the residual liquid generated when hydrochloric acid is used to descale or remove rust
from the surface of plate steel. The pickle liquor is approximately 20 percent ferrous
chloride. The availability of pickle liquor is related to a number of factors that are outside
of the plant's control. Supply has become erratic and often unreliable at times when steel
production is low. Sulfur dioxide has proven to be a suitable replacement for a portion of
the pickle liquor. Sulfur dioxide is a commodity chemical that is readily available and
will increase the plant's flexibility in utilizing alternate reducing agents.
The proposed project will utilize sulfur dioxide stored in the existing sulfur dioxide
storage tank located in the US Filter Salt Cake Purification facility which is located on
the Occidental Chemical Castle Hayne Plant property. The system will transport, meter,
and mix the sulfur dioxide into the plant wastewater stream within the Occidental
Chemical industrial wastewater treatment area. As sulfur dioxide is quite noxious there
will be a number of safety related components designed into the system. Sulfuric acid or
another acid source such as spent hydrochloric acid will be used to acidify the solution in
order to optimize the reaction rate and retention time needed to reduce hexavalent
chromium to trivalent chromium.
The utilization of sulfur dioxide as a reducing agent for hexavalent chromium is well
understood and widely practiced. The US Filter Salt Cake Purification facility uses sulfur
dioxide gas in their process to reduce the remaining hexavalent chrome in sodium sulfate
solution. The sulfur dioxide is stored under pressure as a liquefied gas in a special US
Filter building with its own emergency ventilation system. The properties and hazards of
sulfur dioxide gas and liquid are well known. This project will incorporate the most
effective design, equipment, and procedures in full compliance with the requirements of
regulatory, corporate, and industry standards. Appropriate hazard identification
techniques will be employed at all stages of this project. Sulfur dioxide will only be used
in a manner that is safe and environmentally sound.
The sulfur dioxide addition project will yield the following potential environmental
benefits:
1) Reduction in treated residues generated due to a decreased amount of pickle liquor
used to reduce hexavalent chromium to the trivalent state. Substantially more treated
residues are generated using pickle liquor as a reducing agent since ferric chloride is
precipitated from solution with chromium hydroxide.
2) Reduction in metals due to a decreased amount of pickle liquor used to reduce
hexavalent chromium to the trivalent state. Pickle liquor contains small quantities of
copper, zinc, nickel, and other metals.

3) Potential reduction in total dissolved solids in the 001 outfall stream due to the lower
chloride content associated with the decreased amount of pickle liquor. There is
some degree of uncertainty on how sulfur dioxide will change the characteristics of
wastewater discharge. Therefore, plant trials will be conducted to closely monitor the
effects of sulfur dioxide addition on wastewater discharge on total dissolved solids,
chlorides, and sulfates.
The main reactions associated with SO2 addition are as follows:
2Na2Cr04 + 2H2SO4 -i 2H2Cr04 + 2Na2SO4
3S02 + 2H2CrO4 - Cr2(SO4) 3 + 2H20
Cr2(SO4) 3 + 3Ca(OH) 2 -i 3Cr(OH) 3 + 3 CaSO4
Currently total dissolved solids and chloride levels in the 001 outfall stream are estimated
to average 10,000 mg/L and 5000 mg/L, respectively. During sulfur dioxide addition,
total dissolved solids and chloride levels in 001 outfall are projected to average 9,000
mg/L and 3000 mg/L, respectively, because a reduction in the amount of pickle liquor. It
is estimated that the sulfate concentration in the 001 outfall will range between 1000 to
2000 mg/L depending on the amount of sulfur dioxide added during the treatment
process. There is some degree of uncertainty in estimating changes in the sulfate
concentration in the wastewater discharge. Closely monitored plant trials will be
performed to obtain more concrete data and evaluate any change in the characteristics of
wastewater discharge. During the evaluation the amount of sulfur dioxide used in the
treatment process will be gradually increased to insure that permit limits are not
exceeded.
Attached is a wastewater treatment system drawing depicting the sulfur dioxide addition
system.

PKE E LI011pR
h940MT)
IE5ISTIII0)
I' PETE LINED PIPE
PFtOBE t
BOWL
T
SUiRRY
FLOW
IETER
--i ri ------I% 011115--; SW�-1
1-44
iFT1
NC
1' PTFE LINED PIPE
H.50.
907E
n
1• ALLOY-20
1.sae soa
'hALLL'OhY�20C€
WASTE
PREMIX
TANK
SS -TAT!
1Ex3
OC
DOWN PIPE 1 _
ALLOY-20
WASTE
COLLECTION
TANK
01-77903
01-T7903
MOTE CO.LICTION TM
FAIL CLOSED
IDUCA 0 VALVE
0-4
L_
ALW-20
MASS FLOW 1
IETEA-------------- I
LON FLOE
<30 GPM
CUTS OFF 50,
SG.
167aMR
3• SCA 00 CS IS' NG ADS0W7E
270 0AL/DAT
4• SCH 40 CS
SWAT SLURRY LINE
154000 OAL/OAY
4' S01 40 GS
NORTH SLIIRAY LINE
154000 CAL/DAY
SECONDARY
REPULP
TANK
r�
NEUTRALIZATION AREA
1•S01AOCS
12) NEW
PINCH
VALVES
r-
1
53-1029
PIRA= TANK
0W19lWle
SO2 TANK
* US FILTER SITE
l
STEAM
240a/)R * 150 PSIO
34S. F
JO" UTA.. 10•VE MIMI '•^•584 GALLONS �•^^•�^• •� 42 TON CAPACITY
00031 GALLONS TOO GALLONS
MICRO
FILIED
AEV/pA77
/
OVER APIECIALA
GATE
PLANT APFICAC 1
0RK
grrRDVIO
MUM
ORpL
CAT.
OCCIDENTAL CHEMICAL CORPORATION
TOR.4W�
NED
aECT.I MST.
WASTE TREATMENT AREA
NEW SO2SYSTEM — Paro
3
2
REVISED PRELIMINARY ISSUE
LEyt¢EO PREL[N1HM*Y L*SVE
tssRE
PRELIMINARYLdOCAL
ARV
M11
Hair
1
- - - - -
(
00(1 WO RAN
A
060 Er.
CATVIAIAD
DATE
OATS
No.
RE)I»0>a
PAIN
CM
ow
o
IC .
REVRIONS
CIDDI
OM
MA
CTE
v
SCALE, NONE IRF+EA NO. 914 ID1IG. NG. 3W01 01- IAE5. 3

State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Bill Holman, Secretary
Kerr T. Stevens, Director
September 1, 2000
Mr. Gene F. Renzaglia
Occidental Chemical Corporation
P.O. Box 368
Castle Hayne, NC 28249
A7A
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
Subject: NPDES Permit Modification
Permit NC0003875
Castle Hayne Plant
New Hanover County
Dear Mr. Renzaglia:
The Division is beginning the cycle of permit renewals for the Cape Fear river basin. An examination of the Cape
Fear basin plan and the NPDES permit schedule has revealed that the existing expiration dates in Cape Fear NPDES
permits do not coincide with the revised permit expiration dates for the basin. This discrepancy could create unnecessary
delays in the processing of over 200 permit renewals. Accordingly, the Division is changing the permit expiration dates for
NPDES permits in the Cape Fear river basin.
This permit modification changes the expiration date of the subject permit in subbasin 30623 to January 31, 2002.
Please find enclosed the revised permit cover page. Insert the new cover page into your permit and discard the old page.
All other terms and conditions contained in the original permit remain unchanged and in full effect. This permit
modification is issued under the requirements of North Carolina General Statutes 143-215.1 and the Memorandum of
Agreement between North Carolina and the U. S. Environmental Protection Agency.
In accordance with the modification of the permit expiration date, the new due date for your renewal application is
August 4, 2001. Renewal application forms will be sent to you approximately 6-8 weeks in advance of the new due date or
you may download the forms from the NPDES web site at http://h2o.enr.state.nc.us/NPDES/documents.html. You
will need to download Standard Form C. If you have already submitted a permit renewal form, there is no need to
submit any other forms to the Division; the application will be processed during the renewal period for your subbasin.
If any part of this permit modification 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 a written petition conforming
to Chapter 150B of the North Carolina General Statutes, filed with the Office of Administrative Hearings (6714 Mail
Service Center, Raleigh, North Carolina 27699-6714). Unless such demand is made, this decision shall be final and binding.
If you have any questions concerning this permit modification, please contact Natalie Sierra at [phone],
extension 551.
cc: Central Files
Wilmington Regional Office, Water Quality Section
Point Source Compliance Enforcement Unit
NPDES Unit
Sincerely,
Kerr T. Stevens
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
An Equal Opportunity Affirmative Action Employer
Telephone [phone] FAX [phone]
VISIT US ON THE INTERNET @ http://h2o.enr.state.nc.us/NPDES

Permit NC0003875
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT 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
5408 Holly Shelter Road
Castle Hayne
New Hanover County
to receiving waters designated as the Northeast Cape Fear River in the Cape Fear
River Basin
in accordance with effluent limitations, monitoring requirements, and other
conditions set forth in Parts I, II, III and IV hereof.
This permit shall become effective September 1, 2000.
This permit and authorization to discharge shall expire at midnight on January 31, 2002.
Signed this day September 1, 2000.
Kerr T. Stevens, irector
Division of Water Quality
By Authority of the Environmental Management Commission

State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Bill Holman, Secretary
Kerr T. Stevens, Director
October 1, 1999
Mr. Gene F. Renzaglia
Occidental Chemical Corporation
5408 Holly Shelter Road
Castle Hayne, North Carolina 28429
A741.
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AN D NATURAL RESOURCES
Subject: NPDES Permit Modification
Permit Number NC0003875
Castle Hayne Plant
New Hanover County
Dear Mr. Renzaglia:
The Division issued NPDES permit NC0003875 to the Occidental Chemical
Corporation's Castle Hayne Plant on September 30, 1996. The Division has reviewed your
request for permit modification at the subject facility. Specifically, you requested that
outfall 003 (including all limits and monitoring requirements) be removed from permit
NC0003875. In accordance with your permit modification request, the Division is
forwarding herewith a modification to the subject permit. Modifications to the permit
include the removal of outfall 003 (with associated limits and monitoring requirements)
from permit number NC0003875. Be advised that the modification to outfall 003 in no
manner affects the limits and monitoring requirements for outfalls 001 and 002.
Please remove and discard the `Effluent and Limitations' page for outfall 003 from
your September 30, 1996 NPDES permit. This permit modification 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.
An Authorization to Construct is not required for this project. However, upon
completion of the project please submit an engineering certificate, signed by a North
Carolina licensed professional engineer, stating the project has been completed according
to specifications to DWQ - NPDES unit (address below) and the Wilmington Regional
Office.
Please take notice that this permit is not transferable. Part II, E.4. addresses the
requirements to be followed in case of change in ownership or control of this discharge.
This permit does not affect the legal requirement to obtain other permits which may be
1313 MAIL SERVICE CENTER, RALEIGH, NORTH CAROLINA 27699-1 61 7; TELEPHONE [phone]/FAX [phone]
AN EQUAL OPPORTUNITY AFFIRMATIVE ACTION EMPLOYER - 50% RECYCLED/ 1 0% POST -CONSUMER PAPER

Occidental Chemical Corporation
Mr. Gene F. Renzaglia
NPDES Permit Modification
required by the Division of Water Quality or permits required by the Division of Land
Resources, Coastal Area Management Act or any other Federal or Local government
permit that may be required.
If any parts , measurement frequencies or sampling requirements contained in this
permit modification 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 a written petition conforming to chapter 150B of the North Carolina General
Statutes, 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.
If you have any questions concerning this permit, please contact Mr. Michael Myers
at telephone number [phone], extension 508.
Sincerely
cc: NPDES Permit File
Wilmington Regional Office
Point Source Compliance/Enforcement Unit
Central Files

Facility Name =
NPDES # =
Qw (MGD) =
7Q10s (cfs)=
IWC (%) =
REASONABLE POTENTIAL ANALYSIS
Occidental Chemical
Corp.
NC0003875
0.785
25
4.64
FINAL RESULTS
MBAS
Max. Pred Cw
Allowable Cw
0.0851
10773.3
Parameter =
Standard =
MBAS
500.000
p
n BDL=1/2DL Actual Data
1 0.0125 <0.025
2 0.0290 0.03
3 0.0340 0.03
4 0.0125 <0.025
5 0.0125 <0.025
6 0.0125 <.025 Mult Factor =
7 0.0370 0.04 Max. Value
8 0.0125 <.025 Max. Pred Cw
9 0.0125 <.025 Allowable Cw
10 0.0125 <.025
11 0.0125 <.025
12 0.0125 <.025
13 0.0125 <.025
14 0.0125 <.025
RESULTS
Std Dev. 0.00901167
Mean 0.01696429
C.V. 0.53121413
2.3
0.037 pg/1
0.0851 pg/1
10773.3 pg/1

Permit Modifcation notes:
Occidental Chemical Corporation
Permit Number: NC0003875
Request that outfall 003 be removed from NPDES Permit.
Present status of outfall 003:
Current treatment: None
Permitted flow = .01 MGD (monthly average)
Currently there is a limit for settleable solids and monitoring of BOD5, Turbidity, and MBAS for this
outfall.
Proposal:
Eliminate outfall 003. Flow from outfall 003 will be diverted and introduced into the industrial wastewater
treatment train. Flow from outfall 003 will be combined with the partially treated industrial wastewater
upstream of the sand filter prior to discharge through outfall 001.
Reccomendation:
DMR review revealed that MBAS and Turbidity are consistently low. Maximum values over a three year
period were .037 mg/land 11.3 NTU (avgerage = 1.04) for MBAS and turbidty, respectively. Conducting a
reasonable potential there is no RP that water quality standards will be exceeded for MBAS. Outfall 001
has an average monthly flow of 0.658 MGD (max: 0.749 MGD ) while 003 has an average flow of 0.0009
MGD (max: 0.0032). The permitted flow for outfall 001 is .785 MGD. Therefore, there is sufficient
permitted flow to combine the two flows.
Turbidity mesurements have historically been extremely low. Turbidity is a measure of the suspended
solids contained in a fliud. Since the proposal is to introduce the auto wash wastewater upstream of the
sand filter there should be no problem with suspended solids in the auto wash wastewater. Outfall 001
additionally has TSS monitoring and limits which will provide information on the suspended solids content
of the effluent.
Grant the request for a permit modification . Eliminating outfall 001 has the following benefits:
1. Elimiation of outfall 001 which discharges into an unnamed tributary to the Northeast Cape Fear River.
Outfall 001 discharges directly into the Northeast Cape Fear River.
2. Previously untreated wastewater will recieve some treatment prior to discharge.
In permit modification letter ask them to send us an engineering certification letter stating that the project is
complete and according to specs. cc RO

Oxychern .
•
Subject: Oxychem
Date: Wed, 08 Sep 1999 16:00:39 -0400
From: Ed Beck <[e-mail]>
To: Charles Weaver <[e-mail]>
Charles
The proposal from OxyChem to route the wastewater from rinsing cars to
the wastewater treatment system and eliminating Outfall 003 sounds very
desireable. This Office supports modification of the permit as
proposed.
Thank you,
Ed Beck
Ed Beck <[e-mail]>
1 of 1 9/13/99 5:49 AM

'9-07-1999 9:42AM FROM CASTLE HAYNE ENG 910 675 7313
P. 2
OxyCheniT
CERTIFIED MA1]
July 19, 1999
Mr. David Goodrich
N. C. D.ENR
PO Box 535
Raleigh, NC 27626 - 0535
Re: NPDES NC0003875
Occidental Chemical Corporation
New Hanover County
Dear Mr. Goodrich:
assponsibleCare• �$10
A PUblitCdfimipnggt
To- FP Pe--(fc
/0/V6-5
Ns"
06i
This letter was suggested by Ms. Bethany Bolt in a telephone conversation on May
11, 1999. She thought that a letter describing what we would like to do, and an
accompanying drawing showing how we intend to do it would probably suffice for a
minor modification such as this.
This letter constitutes a proposal to eliminate Occidental's 003 Effluent outfall.
Occidental's 003 outfall is essentially drinking water which has been used to rinse
dust and dirt from employees automobiles. There are no soaps, detergents, or any
other additives used. It simply consists of sprays using drinking water to rinse the
automobiles.
The water used to rinse the automobiles drains to a small catch basin which is piped
into a storm sewer which gravity flows t0 an unnamed tributary to the Northeast
Cape Fear River.
We propose blocking the current path of the effluent, and pumping the water from
the catch basin to a different storm water system, which is contained, and which
becomes part of the influent to Occidental's industrial wastewater treatment facility.
The final step in the treatment of the industrial effluent (001) is filtration by sand
filters, so the automobile rinse water would be receiving more treatment than it is
currently (none).
,—, Occidental Chemical Corporation
OXY 5408 Holly Shelter Road, P.O. Sox 368, Castle Heyne, North Carolina 28249
1164.0/ 910/675-7200 FAX: [phone]D1
O$HA $TA WORKS$TE

.9-07-1999 9:43AM
FROM CASTLE HAYNE ENG 910 675 7313 P. 3
The volume of the automobile rinse water is very small (typically about 1000GPD)
compared to the volume already being treated at the industrial wastewater
facility(typically about 300,000 GPD). It is doubtful that the wastewater treatment
operators will even notice the difference.
The reason for eliminating the effluent is to decrease sampling, analytical, and
clerical work associated with it.
If there are any questions or additional requirements please contact me at 910-675-
7224 or John O'Janpa at 910-675-7249.
Sincerely,
:Renzaglia
Plant Manager
OCCIDENTAL CHEMICAL CORPORATION
Enclosure

'9-07-1999 9:43AM FROM CASTLE HAYNE ENG 910 675 7313
P. 4
• twits
, ®• Occidental Chemical Corporation
OOQ - 9006
Job.141istabor
Air_C ele-.4.1r 6°4 eA-417PAr
Pew
IW
ammimm
Daii,5//7/?
.0 rn W
tiN
fn
c 5
c- G
3
fir- -
33
0 '.-
1,4
frit
‘4,1;;.
k
0

'9-07-1999 9:42AM
FROM CASTLE HAYNE ENG 910 676 7313 P. 1
A PR=R1=0
GOZGUMMIZEMIZI 71116 MESSAGE AND ANY AITAi or
max POE TEE =dVoi1A1. O# PSVTAY NAMED 86[.01V Alm MAY CCpR'wtN
2401IMATION MAT IS PA1VBINIED. COMMA!. Ate 100Ba"C FRS DISCLOSURE
IJNDFA /aqua= LAW. IF 'lam READER OF THIS PASSAGE 1S NOT THE ammo
i@M YOU ARC =EBY Dt0'IJC'@:D 'EBAT ANY Dom. DEIRRaNATION CU
CCiFYJNG OP'1i88 C'j1'[LhN IS 8!$ic7.Y Nunuerito. 1F YOU NAVE RISCEiVED
1MS cO►OMUNICA7'EoliDiEdRM PLfJaY14011EY 11SHYTELEPHONE AND
=AN=ORIGINAL Tp1lSVIA '1ffiuS.P083'Atr =VIM THANK YOU.
FACIMILE COVER SHEET
712; Cfl4QLF DAM
9/9- 733 -r 077..:y
COMPANY, irdAvra,.. 1.7,iddurr- Fazitis
NO. OF PAM& -5
plus Caw )
counerm AS 'Fbel _
SCSI `t' _..`l��rS fo T-74 Geigon/G-- Po6>\-/
G�L�rA/�4GC.( eof S(C�/CL7 ege-6:/t/
cl_
THIS FAX IS FROM THE CASTLE HAYNE, NC PLANT. P SEND
MESSAGES TO THE APPROPRIATE LOCATIONS AS LISTED BELOW:
ADMINISTRATION
ENGINEERINGfrECHNICAL
HUMAN RESOURCES
LABORATORY
PURCHASING DEPARTMENT
TRANSPORTATION
STOREROOM -RECEIVING
FAX # [phone]
FAX #* 910-675-7313
FAX #f 91047S-72n
FAX # [phone]
FAX # [phone]
FAX # [phone]
FAX # [phone]
r OGcQenta1=arnica! C, orporanon
'' 9408 Holly Shelter Aorta. t ,O. Box 368. Came hayne. North Carolina 28429
91016784200 FAX:[phone]

NCDENR-DWQ Fax
** Transco i t Con _ Report **
Sep 8 '99 10:30
NCDENR-DWQ ---> WIRO
No.
0001
Mode
NORMAL
Time
1'14"
Pages
3 Page(s)
Result
0 K

State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Bill Holman, Secretary
Kerr T. Stevens, Director
Mr. Gene F. Renzaglia
Occidental Chemical Corporation
5408 Holly Shelter Road
Castle Hayne, North Carolina 28429
Dear Mr. Renzaglia:
Av';;;74
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
September 29, 1999
Subject: NPDES Permit Modification
Permit Number NC0003875
Castle Hayne Facility
New Hanover County
The Division issued NPDES permit number NC0003875 to Occidental Chemical Corporation on
September 30, 1996. The Division has reviewed your request for permit modification at the subject facility.
Specifically, you requested that the effluent limitations and monitoring requirements for outfall 003, vehicle
rinse water, be eliminated as those waters now flow to the industrial waste treatment facility and are ultimately
discharged though outfall 001. In accordance with your permit modification request, the Division is
forwarding herewith a modification to the subject permit. The Supplement to Permit Cover Sheet has been
modified to reflect the discharge of vehicle rinse water through outfall 001.
Enclosed please find the modified Supplement to Permit Cover Sheet. This page should be inserted
into your permit and the old one discarded. Additionally, the effluent limitations page for outfall 003 should
be removed and discarded. This permit modification 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.
Please take notice that this permit is not transferable. Part II, E.4. addresses the requirements to be
followed in case of change in ownership or control of this discharge. This permit does not affect the legal
requirement to obtain other permits which may be required by the Division of Water Quality or permits
required by the Division of Land Resources, Coastal Area Management Act or any other Federal or Local
government permit that may be required.
If you have any questions concerning this permit, please contact Mr. Mark McIntire at telephone
number [phone], extension 553.
Sim rely
7 4.4
//7,14 A'
err T. Stevens
Cc: Central Files
NPDES Permit File
Wilmington Regional Office
Point Source Compliance/Enforcement Unit
1617 MAIL SERVICE CENTER. RALEIGH. NORTH CAROLINA 27699-1617 - TELEPHONE [phone]/FAX [phone]
AN EQUAL OPPORTUNITY AFFIRMATIVE ACTION EMPLOYER - S0% RECYCLED/ 1 0% POST -CONSUMER PAPER

e
•
Permit No. NC0005875
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 of treated process wastewater and vehicle rinse water
through outfall 001, 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
2. Discharge from said treatment works at the locations specified on the attached map into the
Northeast Cape Fear River, a class B-Swamp water in the Cape Fear River Basin_

e
[Fwd:'Oxychem]
n
Subject: [Fwd: Oxychem]
Date: Wed, 22 Sep 1999 17:44:48 -0400
From: Ed Beck <[e-mail]>
To: Mark McIntire <[e-mail]>
Subject: Oxychem
Date: Wed, 08 Sep 1999 16:10:27 -0400
From: Ed Beck <[e-mail]>
To: Charles Weaver <[e-mail]>
Charles
The proposal from OxyChem to route the wastewater from rinsing cars to
the wastewater treatment system and eliminating Outfall 003 sounds very
desireable. This Office supports modification of the permit as
proposed.
Thank you,
Ed Beck
Ed Beck <[e-mail]>
Ed Beck <[e-mail]>
1 of 1
09/23/1999 8:24 AM

s•
Memo Fro
To:
741,00 (C5
()Lin(C4(t
Val
Division o
Water Qua%
Subject_
Date:
L_
jc47J � °rCl rff. 1�Q'�Cs
f
6---)604k
M/k/
41711
NCDE R
C
p North
o h Carolina Department
x 28535. Raleigh, o of Environment
rth Carolina 2726 05 Natural Resources
35 /
Phone:
P
hone: 733'5083

OxyChem.
CERTIFIED MAIL P427 891 838
.July 19, 1999
Mr. David Goodrich
N. C. DENR
PO Box 535
Raleigh, NC 27626 - 0535
Re: NPDES NC0003875
Occidental Chemical Corporation
New Hanover County
Dear Mr. Goodrich:
Responsible Care®
A Public Commitment
n[�6�Odf�
uu
2 3 1999
JUL,1UL 2 3 1999
DENR - WATER QUALITY
POINT SOURCE BRANCH
This letter was suggested by Ms. Bethany Bolt in a telephone conversation on May
11, 1999. She thought that a letter describing what we would like to do, and an
accompanying drawing showing how we intend to do it would probably suffice for a
minor modification such as this.
This letter constitutes a proposal to eliminate Occidental's 003 Effluent outfall.
Occidental's 003 outfall is essentially drinking water which has been used to rinse
dust and dirt from employees automobiles. There are no soaps, detergents, or any
other additives used. It simply consists of sprays using drinking water to rinse the
automobiles.
The water used to rinse the automobiles drains to a small catch basin which is piped
into a storm sewer which gravity flows to an unnamed tributary to the Northeast
Cape Fear River.
We propose blocking the current path of the effluent, and pumping the water from
the catch basin to a different storm water system, which is contained, and which
becomes part of the influent to Occidental's industrial wastewater treatment facility.
The final step in the treatment of the industrial effluent (001) is filtration by sand
filters, so the automobile rinse water would be receiving more treatment than it is
currently (none).
Occidental Chemical Corporation
LY 5408 Holly Shelter Road, P.O. Box 368, Castle Hayne, North Carolina 28249
910/675-7200 FAX: [phone]
OSHA STAR WORKSITE

The volume of the automobile rinse water is very small (typically about 1000GPD)
compared to the volume already being treated at the industrial wastewater
facility(typically about 300,000 GPD). It is doubtful that the wastewater treatment
operators will even notice the difference.
The reason for eliminating the effluent is to decrease sampling, analytical, and
clerical work associated with it.
If there are any questions or additional requirements please contact me at 910-675-
7224 or John O'Janpa at 910-675-7249.
Sincerely,
T•
e . Renzaglia
Plant Manager
OCCIDENTAL CHEMICAL CORPORATION
Enclosure

tol• Occidental Chemical Corporation
OCC - 9006
Job Humber
Page
,Or
Project
RqAJr 2 .9s, F��, c% c=;4 t es rr,,J
Subject
Checked By
Datez:// 7/99

Facility Name
NPDES #
Div (MGD)
7Q10s (cfs)
IWC(%)
eying Stream
Stream Class
occidental them
nc0003875
0.785
25
4.64
NE cape fear r
B-Swamp
FINAL RESULTS
sulfates
ax. Pred Cw 0
Allowable Cw 5386634.5
Max. Value 0
Cr
ax. Pred Cw 0
Allowable Cw 1077.3
Max. Value 0
chloride
ax. Pred Cw 0
Allowable Cw 4955703.7
Max. Value 0
ax. Pred Cw 0
Allowable Cw #VALUEI
Max. Value 0
ax. Pred Cw 0
Parameter =
Standard =
ug/I
ug/I
ug/l
ug/I
ug/I
ug/I
ug/i
ug/I
ug/I
sulfates
250000
Ng/l
TOXICANT ANALYSIS
Parameter = Cr
Standard =
50
pg/I
Parameter= chloride
Standard = I 2300001 p9/1
M
P n
n BDL=1/2DL tual Data RESULTS n DL=1/2Dltual Data RESULTS n DL=1/2DL tual Dat RESULTS
1 Std Dev. #DIV/01 1 Std Dev. #DIV/0I 1 Std Dev. #DIV/01
2 Mean #DIV/0! 2 Mean #DIV/0I 2 Mean #DIV/0I
3 C.V. #DIV/0! 3 C.V. #DIV/01 3 C.V. #DIV/0!
4 4 4
5 5 5
6 Mult Factor = ( 6 Mult Factor = I 6 Mult Factor =
7 Max. Value 0 pg/I 7 Max. Value 0 pg/1 7 Max. Value 0 pg/I
8 Max. Pred C 0 pg/1 8 Max. Pred C 0 pg/1 8 Max. Pred C 0 pg/I
9 Allowable C 5386634.48 pg/1 9 Allowable C 1077.33 pg/1 9 Allowable C4955703.72 pg/I
10 10 10
11 11 11
12 12 12
13 13 13
14 14 14
15 15 15
16 16 16
17 17 17
18 18 18
19 19 19
20 20 20
21 21 21
22 22 22
23 23 23
7/3/01

STORMWATER
57 GPM
WELL WATER 25 GPM
SUMP
SURGE
TANK
SALT CAKE SCRUBBER 30 GPM
PROCESS SUMPS
20 GPM
PICKLE 1 GPM
LIQUOR
82 GPM
BATCH
WATER
REACTOR
12,000 GAL
PICKLE LIQUOR
REJECT RESIDUE 158 GPM
SULFUR DIOXIDE* 2.5 lb/min
PICKLE LIQUOR 10 GPM
SULFUR ACID* 1.0 GPM
RECYCLE RESIDUE 60 GPM
PREMIX
TANK
CONESTOGA-ROVERS & ASSOCIATES, INC.
CRA ENGINEERING, INC.
169 GPM
WASTE
COLLECTION
TANK
83 GPM
7 GPM
279 GPM
LIME SLURRY
CHROMIUM TREATMENT
M. LIFE
Drawn By
REACTORS
(3)
3x24,000 GAL
7.0 GPM
293 GPM
WATER
TREATMENT
SUMP
TREATMENT
SURGE
TANK
44 GPM
BOILER BLOWDOWN 15 GPM
435 GPM
545 GPM
OVERFLOW
TANK
545 GPM
POLISHING
FILTERS
545 GPM
130 GPM
RIVER WATER
FEED
SLURRY
TANK
•
NO. 1
THICKNER
NO. 1
CYCLONE
90 GPM
NO. 1
LIGHT
RESLURRY
TANK
{
NO. 2
THICKNER
90 GPM
NO. 2
LIGHT
RESLURRY
TANK
w TO RIVER
100 GPM
NO. 3
THICKNER
90 GPM 180 GPM
RIVER WATER
NO. 1
HEAVY
RESLURRY
TANK
NO. 2
CYCLONE
- PROPOSED, PENDING STATE APPROVAL OF ATC # 003875ACB
Checked By
Approved By
7/16/01
Date
0
Rev. No.
NTS
Scale
26300-00(0000-NV001
Drawing No.
NO. 2
HEAVY
RESLURRY
TANK
CHLORIDE REMOVAL
NO. 3
CYCLONE
RIVER WATER OR
QUARRY WATER
SLUDGE
HOLD
TANK
30 GPM
SLURRY
RETENTION
TANK
2.0 TPH CRUSHED
LIMESTONE
300 GPM
► TO QUARRY
p�1 OCCIDENTAL CHEMICAL CORP.
`, CASTLE HAYNE, NORTH CAROLINA
GENERAL SCHEMATIC
OF
WASTEWATER TREATMENT
11
Fig No.

1 FIC
PICKLE LIQUOR
01 -R8002
i
AFT j
3WS-500-12
(EXISTING)
1" PTFE LINED PIPE
pH PROBE
BOWL
0
Z
X
6" OVERFLOW
,
FT
SLURRY
FLOW
METER
r---------� FIC
\
- - - - - - pHIC �- -
pHT �- -
1" PTFE LINED PIPE
NOTE:
1. THE NEW EQUIPMENT IS SHOWN IN RED.
EXISTING EQUIPMENT IS SHOWN IN BLACK.
H2SO4
98%
WASTE
PREMIX
TANK
S5-T629
DOWN PIPE
ALLOY-20
POSITION
SWITCH
WASTE
COLLECTION
TANK
01 -T7903
01 -T7903
WASTE COLLECTION TANK
30' DIA., 15.25' HEIGHT
80631 GALLONS
" ALLOY-20
r-
0
D
E
B
E
A
K
FAIL CLOSED
BLOCK VALVE
1" SCH 80 CS
PRESSURE
SWITCH
CODE ALLOY-20
BREAK CS
3x1 1/2
11/2' MASS
FLOW METER
3" SCH 80 CS
LOW FLOW
<30 GPM
CUTS OFF SO,
SO2
167#/HR (DESIGN)
15" Hg ABSOLUTE
Np"'" a
N°t°'tionagerreCoratisskoo
N
S
S5-T629
PREMIX TANK
4`-0" DIA. AND 6'-0" STRAIGHT WALL
564 GALLONS
T-1 818
/L.
3-- —>4 FICI
VITUTKPOR
SECONDARY REPULP TANK
7'-6" DIA. AND 101-0" STRAIGHT WALL
3300 GALLONS
OTHER APPROVALS:
PLANT APPROVALS:
APPROVAL:
STR. & CIVIL
MECHANICAL
ELECT. & INST.
PROCESS
PROJECT
E
EVAPORATOR
270 GAL/DAY
4" SCH 40 CS
(EXISTING)
SOUTH SLURRY LINE
154000 GAL/DAY
4" SCH 40 CS
(EXISTING)
NORTH SLURRY LINE
154000 GAL/DAY
T-1818
SECONDARY
REPULP
TANK
co,
P1820
►t
0
P1821
NEUTRALIZATION AREA
1" SCH 80 CS
SO2 TANK
US F ILTER SITE
SO2 TANK
42 TON CAPACITY
7050 GALLONS
( 2 ) NEW
PINCH
VALVES
(
STEAM
260#/HR @ 150 PSIG
365° F
FINAL PLANS
NOT FOR CONSTRUCTION
r9 23 2001
I_--
DEA - WATER QUALITY
SOURCE BRANCH
MICRO
F ILMED
OXY OCCIDENTAL CHEMICAL COHnATION
WASTE TREATMENT AREA
NEW SO2 SYSTEM - P&I D
ORIGINAL ISSUE
REVISIONS
J245.DSi�I Feb.
2001 DE: 5
DRWN CHKD APP DATE NO.
REVISIONS
DRAWN BY: RRW
DESG.CAL.BY:
CHECKED BY:
DATE11/27/00
DATE
DATE
SCALE: NONE
AREA NO. 914
DWG. NO. 3 W01 01 -245
REV. A