WQ0001492_Final Permit_20160725

Water Resources
ENVIRONMENTAL QUALITY
PAT MCCRORY
Governor
DONALD R. VAN DER VAART
Secrewy
S. JAY ZIMMERMAN
Director
July 25, 2016
MIKE ANDERSON — VICE PRESIDENT
OCCIDENTAL CHEMICAL CORPORATION
5 GREENWAY PLAZA— SUITE 110
HOUSTON, TEXAS 77046-0521
Dear Mr. Anderson:
Subject: Permit No. WQ0001492
Elementis Chromium Castle
Rayne Manufacturing Facility
Surface Disposal of Industrial
Byproduct Residuals
New Hanover County
In accordance with your permit renewal request received February 17, 2016, and subsequent
additional information received May 17, 2016, we are forwarding herewith Permit No. WQ0001492 dated
July 25, 2016, to the Occidental Chemical Corporation for the continued operation of the subject residuals
management program. Please note that this renewed permit shall become effective on September 1, 2016
(i.e. the day after the expiration date of the existing permit), which differs from the date of this letter.
This permit shall be effective from September 1, 2016, until August 31, 2021, shall void Permit
No. WQ0001492 issued September 25, 2007, and shall be subject to the conditions and limitations as
specified therein. Please pay particular attention to the monitoring requirements listed in Attachments A
and C for they may differ from the previous permit issuance. Failure to establish an adequate system for
collecting and maintaining the required operational information shall result in future compliance problems.
Please note the following permit conditions have been removed since the last permit issuance
dated September 25, 2007:
➢ Old Condition IV.11. — Duration of record keeping is part of each individual record keeping
requirement condition.
Please note the following permit conditions are new since the last permit issuance dated
September 25, 2007:
➢ Condition I1.3. — Newly constructed wells to be constructed according to regulations.
➢ Condition 11.8. — Similar to Old Condition 11.6., but now the concentrations allowed are a
function of the distance from the surface disposal unit to the nearest property line.
➢ Condition 11.9. — Biological residuals disposed to be exempt from meeting pathogen reduction
or vector attraction reduction if covered each day. Non -biological residuals are exempt.
State of North Carolina I Environmental Quality I Water Resources I Water Quality Permitting I Non -Discharge Permitting
1617 Mail Service Center I Raleigh, North Carolina 27699-1617
919 807 6464

Mr. Mike Anderson
July 25, 2016
Page 2 of 2
➢ Condition II.11. — Similar to Old Condition II.9., but note is made that any additional
exceedances will result in additional corrective action since currently corrective actions being
taken.
➢ Condition II.12. — Similar to Old Condition II.10., but note is made that any additional
exceedances will result in additional corrective action since currently corrective actions being
taken.
➢ Condition III.2. — Similar to Old Conditions H.12. and II.13., but now notification needs to be
48 hours rather than 24 hours before initial application.
➢ Condition 111.3. — Operations and Maintenance (O&M) requirements are specified.
➢ Condition III.11. — Closure procedures to follow regulations.
➢ Condition IV.5. — Vector Attraction Reduction requirements are specified.
➢ Condition VL6. — Similar to Old Condition VI.6., but now 60-day notice required before
revocation or modification.
➢ Condition VI.7. — Modification of facility not allowed without waiver if the Permittee has
exhibited behavior detrimental to environment.
If any parts, requirements or limitations contained in this permit are unacceptable, the Permittee
has the right to request an adjudicatory hearing upon written request within 30 days following receipt of
this permit. This request shall be in the form of a written petition, conforming to Chapter I 50B of the North
Carolina General Statutes, and filed with the Office of Administrative Hearings at 6714 Mail Service
Center, Raleigh, NC 27699-6714. Unless such demands are made, this permit shall be final and binding.
If you need additional information concerning this permit, please contact Troy Doby at (919) 807-
6336 or troyy dobynncdenr.gov.
Sincerely,
es C�►u��
?S. Jay Zimmerman, P.G., Director
Division of Water Resources
cc: New Hanover County Health Department (Electronic Copy)
Wilmington Regional Office, Water Quality Regional Operations Section (Electronic Copy)
Steve Hart — Hart & Hickman, PC rshart(c�r�,harthickman.com] (Electronic Copy)
Beth Buffington — Protection and Enforcement Branch (Electronic Copy)
Digital Permit Archive (Electronic Copy)
Central Files

NORTH CAROLINA
ENVIRONMENTAL MANAGEMENT COMMISSION
DEPARTMENT OF ENVIRONMENTAL QUALITY
RALEIGH
SURFACE DISPOSAL OF INDUSTRIAL BYPRODUCT RESIDUALS PERMIT
In accordance with the provisions of Article 21 of Chapter 143, General Statutes of North Carolina as
amended, and other applicable Laws, Rules, and Regulations
PERMISSION IS HEREBY GRANTED TO
Occidental Chemical Corporation
New Hanover County
FOR THE
continued operation of a residuals management program for the Occidental Chemical Corporation and
consisting of the surface disposal of Industrial Byproduct residuals generated by the approved facility listed
in Attachment A to the approved sites listed in Attachment B with no discharge of wastes to surface waters,
pursuant to the application received February 17, 2016, and subsequent additional information received by
the Division of Water Resources, and in conformity with other supporting data subsequently filed and
approved by the Department of Environmental Quality and considered a part of this permit. The use and
disposal of residuals are regulated under Title 40 Code of Federal Regulations Part 257. This permit does
not exempt the Permittee from complying with the federal regulations.
This permit shall be effective from September 1, 2016, until August 31, 2021, shall void Permit No.
WQ0001492 issued September 25, 2007, and shall be subject to the following specified conditions and
limitations:
L SCHEDULES
1. No later than six months prior to the expiration of this permit, the Permittee shall request renewal of
this permit on official Division forms. Upon receipt of the request, the Division will review the
adequacy of the facilities described therein, and if warranted, will renew the permit for such period of
time and under such conditions and limitations as it may deem appropriate. Please note Rule 15A
NCAC 02T .0105(d) requires an updated site map to be submitted with the permit renewal application.
[15A NCAC 02T .0108(b)(2), 02T .0105(d), 02T .0109]
2. At least 180 days prior to the closing of a surface disposal unit, a formal closure plan and post -closure
management care program, as well as an implementation schedule shall be submitted. This information
shall be specific to the surface disposal unit, as well as relate to the Pernnittee's .future plans for the
land. The following information shall be included:
a. How the surface disposal unit will be closed;
b. A discussion of how the leachate collection system will be operated and maintained;
c. A discussion of how public access to the surface disposal unit will be restricted; and
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d. Proof that the deed for the surface disposal unit property has been amended to provide permanent
written notification to subsequent owners of the property that the property was used for the purposes
of operating a surface disposal unit.
Submit three copies of all information to the Division of Water Resources, Water Quality Permitting
Section, Non -Discharge Permitting Unit, 1617 Mail Service Center, Raleigh, NC 27699-1617. [15A
NCAC 02T .1109(c)(3)]
II. PERFORMANCE STANDARDS
The subject residuals management program shall be effectively maintained and operated at all times so
there is no discharge to surface waters, nor any contravention of groundwater or surface water
standards. In the event the facilities fail to perform satisfactorily or the Permittee receives notification
from Elementis Chromium, L.P. that the residuals stabilization/conveyance facilities are not operating
satisfactorily, including the creation of prolonged nuisance conditions due to improper operation and
maintenance, the Permittee shall immediately cease disposal of residuals to the surface disposal unit,
contact the Wilmington Regional Office supervisor, and take any immediate corrective actions. [G.S.
143-215.1]
2. This permit shall not relieve the Permittee of responsibility for damages to groundwater or surface
water resulting from the operation of this residuals management program. [15A NCAC 02B .0200,
02L .0100]
3. All new wells constructed for purposes of groundwater monitoring shall be constructed in accordance
with 15A NCAC 02C .0108 (Standards of Construction for Wells Other than Water Supply), and any
other jurisdictional laws and regulations pertaining to well construction. [15A NCAC 02C .0108]
4. Only residuals generated by the facilities listed in Attachment A are approved for surface disposal in
accordance with this permit. [G.S. 143-215.11
5. Only residuals that have been adequately stabilized with crushed limestone or other alkaline
amendment shall be disposed of in the surface disposal unit. The goal of the stabilization process,
which is performed by Elementis Chromium, L.P. as provided for in the originally -executed Quarry
License Agreement, shall be to raise the residuals to the proper pH in order to render the chromium in
the residuals essentially immobile. [ 15A NCAC 02T .0108(b)(1)]
6. Only residuals that are non -hazardous under the Resource Conservation and Recovery Act (RCRA)
shall be disposed of in the surface disposal unit. [ 15A NCAC 02T .1101(8)]
7. Only the sites listed in Attachment Bare approved for residuals surface disposal. [G.S. 143-215.1]
8. Pollutant concentrations in residuals for surface disposal shall not exceed the following Ceiling
Concentrations (dry weight basis):
Distance from Surface Disposal Unit
Boundary to Closest Property Line.
(meters)
Ceiling Concentration
(milligrams per kilogram)
Arsenic
Cbromium
Nickel
0 to < 25
30
200
210
25 to < 50
34
220
240
50 to < 75
39
260
270
75 to < 100
46
300
320
100 to < 125
53
360
390
125 and greater
62 1
450
420
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Residuals that exceed the ceiling concentration for chromium may be disposed of in the surface
disposal unit as long as they are determined to be non -hazardous under RCRA with respect to
chromium leachability as stipulated in Condition N.2. and as long as the groundwater monitoring
program as stipulated in Attachment C of this permit demonstrates that the surface disposal unit is
not causing the assigned groundwater quality standards to be violated.
[ 15A NCAC 02T. 11051
9. Biological residuals that are disposed shall be exempt from meeting Class A or B pathogen reduction
requirements in 15A NCAC 02T .l 106 (a) if the residuals are (1) covered with soil or other material at
the end of the operating day or (2) the residuals meet one of the vector attraction reduction alternatives
in 15A NCAC 02T .1107(a). Non -biological residuals are exempt from this condition. [15A NCAC
02T .I 106(a)(2), 15A NCAC 02T .I 107(b)(2)]
10. Setbacks for surface disposal units shall be as follows:
Setback Description
Setback
feet
Habitable residence or place of public assembly under separate ownership or not to
400
be maintained as part of the project site
Property lines
50
Public right of way
50
Private or public water supply
100
Surface waters (streams — intermittent and perennial, perennial waterbodies, and
wetlands)
100
Surface water diversions (ephemeral streams, waterways, ditches)
25
Any interceptor drains or surface water diversions (upslope)
10
Any interceptor drains or surface water diversions (downslope)
25
Some of the setbacks specified above may not have been included in previous permits for this surface
disposal unit. These setbacks are not intended to prohibit or prevent modifications that are required by
the Division to improve performance of the existing unit. These setbacks also do apply to any
expansion or modification of the unit and apply in instances in which the sale of property would cause
any of the setbacks currently complied with to be violated. The Permittee is advised that any
modifications to the existing surface disposal unit shall require a permit modification.
[15A NCAC 02H .0200]
11. Section I of Quarry I of the surface disposal site was individually permitted prior to December 30, 1983;
therefore, the compliance boundary is established for Section 1 of Quarry I at either 500 feet from this
surface disposal area, or at the property boundary, whichever is closest to the surface disposal area.
Section II of Quarry I of the surface disposal site was individually permitted on or after December 30,
1983; therefore, the compliance boundary is established at Section II of Quarry I either 250 feet from
this surface disposal area, or 50 feet within the property boundary, whichever is closest to the surface
disposal area. Any additional exceedance of groundwater standards at or beyond the compliance
boundary is subject to additional remediation action according to 15A NCAC 02L .0106(d)(2) as well
as additional enforcement actions in accordance with North Carolina General Statute 143-215.6A
through 143-215.6C. Any approved relocation of the COMPLIANCE BOUNDARY will be noted in
Attachment B. [15A NCAC 02L .0107(a)]
12. The review boundary shall be established midway between the compliance boundary and the residual
surface disposal area. Any additional exceedance of groundwater standards at the review boundary
shall require additional action in accordance with 15A NCAC 02L .0106. [15A NCAC 02L .0108]
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13. No wells, other than Division approved monitoring wells, shall be constructed within the compliance
boundary, except as provided by 15A NCAC 02L .0107(g). [15A NCAC 02L .0107(d)]
14. Level gauges shall be maintained at all times to monitor freeboard levels in Quarry I/Section I and
Quarry I/Section II of the surface disposal unit. [15A NCAC 02T .0108(b)(1)]
III. OPERATION AND MAINTENANCE REQUIREMENTS
1. The residuals management program shall be properly maintained and operated at all times. The
program shall be effectively maintained and operated as a non -discharge system to prevent any
contravention of surface water or groundwater standards. [I5A NCAC 02T .1110]
2. The Wilmington Regional Office, telephone number (910) 796-72I5, and the appropriate local
government official (i.e., county manager, city manager, or health director) shall be notified at least 48
hours prior to the initial surface disposal event to any new surface disposal site. Notification to the
regional supervisor shall be made from 8:00 a.m. until 5:00 p.m. on Monday through Friday, excluding
State Holidays. [15A NCAC 02T .0108(b)(1)]
3. The Permitkee shall maintain an approved Operation and Maintenance Plan (O&M Plan) Modifications
to the O&M Plan shall be approved by the Division prior to utilization of the new plan. The O&M Plan,
at the minimum, shall include:
a. Operational functions;
b. Maintenance schedules;
c. Safety measures;
d. Spill response plan;
e. Inspection plan including the following information:
i. Names and/or titles of personnel responsible for conducting the inspections;
ii. Frequency and location of inspections, including those to be conducted by the ORC, and
procedures to assure that the selected location(s) and inspection frequency are representative
of the residuals management program;
iii. Detailed description of inspection procedures including record keeping and actions to be taken
by the inspector in the event that noncompliance is observed pursuant to the noncompliance
notification requirements under the monitoring and reporting section of the permit;
f. Sampling and monitoring plan including the following information:
i. Names and/or titles of personnel responsible for conducting the sampling and monitoring;
ii. Detailed description of monitoring procedures including parameters to be monitored;
iii. Sampling frequency and procedures to assure that representative samples are being collected.
Fluctuation in temperature, flow, and other operating conditions can affect the quality of the
residuals gathered during a particular sampling event. The sampling plan shall account for any
foreseen fluctuations in residuals quality and indicate the most limiting times for residuals to
meet vector attraction reduction requirements (e.g. facilities that dispose multiple times per
year but have an annual sampling frequency, may need to sample during winter months when
pathogen reduction is most likely to be negatively affected by cold temperatures).
[I5A NCAC 02T .l 100]
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4. Upon the Water Pollution Control System Operators Certification Commission's (WPCSOCC)
classification of the facility, the Permittee shall designate and employ a certified operator in responsible
charge (ORC) and one or more certified operators as back-up ORCs in accordance with 15A NCAC
08G .0201. The ORC or his back-up shall visit the facilities in accordance with 15A NCAC 08G. 0204,
or as specified in the most recently approved O&M plan (i.e., see Condition II1.3.), and shall comply
with all other conditions of 15A NCAC 08G. 0204. For more information regarding classification and
designation requirements, please contact the Division of Water Resources' Protection and Enforcement
Branch at [phone]. [15A NCAC 02T .0117]
5. A copy of this permit shall be maintained at the surface disposal unit when residuals are being disposed.
The spill prevention and control plan shall be maintained in all residuals transport and disposal vehicles.
[15A NCAC 02T .0108(b)(1)]
6. Appropriate measures shall be taken to control public access to the surface disposal unit during active
use, and for the 36-month period following closure of the surface disposal unit. Such controls may
include fencing and the posting of signs indicating the activities conducted at each site. [I5A NCAC
02T .I 109(c)(2)(G)]
7. Adequate provisions shall be taken to prevent surface runoff from any active surface disposal unit. If
runoff cannot be prevented, a collection system shall be installed with the capacity to handle runoff
from a 24-hour, 25-year storm event. All collected runoff shall be disposed in a Division approved
manner. [15A NCAC 02T .1109(c)(2)(C)]
8. Adequate provisions shall be taken to prevent wind erosion from conveying residuals from the surface
disposal sites onto adjacent properties or into surface waters. [ 15A NCAC 02T .1109(c)(2)(C)]
9. Food crops, feed crops and/or fiber crops shall not be grown on an active surface disposal unit, unless
approval has been requested and received from the Division. [ 15A NCAC 02T .1109(c)(2)(1)]
10. Animal grazing shall not be permitted on an active surface disposal unit, unless approval has been
requested and received from the Division. [15A NCAC 02T .1109(c)(2)(H)]
11. Following active use, the surface disposal units will be closed in accordance with the requirements
of 15A NCAC 02T.I 109(c)(2) and 15A NCAC 02T. 1 109(c)(3). [15A NCAC 02T. I 109(c)(2), 15A
NCAC 02T .I 109(c)(3)]
12. This permit shall become voidable if operation of the surface disposal sites causes contravention of
surface water or groundwater standards, and may be revoked unless the surface disposal sites are
maintained and operated in a manner that will protect the assigned surface water and groundwater
quality standards. [ 15A NCAC 02T .0110]
13. Freeboard in Quarry I/Section I and Quarry I/Section 11 of the surface disposal unit shall not be less
than two feet at any time. The freeboard levels in each of the referenced lagoons shall be monitored by
an individual level gauge that has readily visible permanent markings indicating the maximum liquid
level at the top of the temporary liquid storage volume, minimum liquid level at the bottom of the
temporary liquid storage volume, and top of the dam elevations. Freeboard levels in each of the
referenced sections of the unit shall be monitored and recorded daily (i.e., excluding weekends and
State holidays). [I5A NCAC 02T .0108(b)(1)]
14. Supernatant from the surface disposal unit shall be collected and returned to the wastewater treatment
facilities serving Elementis Chromium, L.P.'s Castle Hayne, NC Manufacturing Facility (NPDES
Permit No. NC0003875) as necessary to maintain the required freeboard. [15A NCAC 02T
.1109(c)(2)(D)]
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15. A protective vegetative cover shall be established and maintained on the embankments of Quarry
I/Section I and Quarry I/Section II of the surface disposal unit (i.e., outside toe of embankment to
maximum liquid level), berms, pipe runs, erosion control areas, and surface water diversions. Trees,
shrubs, and other woody vegetation shall not be allowed to grow on the unit dikes or embankments.
All embankment areas shall be kept mowed or otherwise controlled and accessible. [15A NCAC 02T
.0108(b)(1)]
16. The active surface disposal unit shall not restrict the flow of the base flood. [15A NCAC 02T
.1109(c)(1)(E)]
17. The active surface disposal unit shall not be located in an unstable area. [15A NCAC 02T
.1109(c)(1)(C)]
IV. MONITORING AND REPORTING REQUIREMENTS
1. Any Division -required monitoring (including groundwater, plant tissue, soil and surface water
analyses) necessary to ensure groundwater and surface water protection shall be established, and an
acceptable sample reporting schedule shall be followed. [15A NCAC 02T .0108(c)]
2. Residuals shall be analyzed to demonstrate they are non -hazardous under the Resource Conservation
and Recovery Act (RCRA). Residuals that tests or is classified as a hazardous or toxic waste
under 40 CFR Part 261 shall not be used or disposed under this permit.. The analyses
(corrosivity, ignitability, reactivity, and toxicity characteristic leaching procedure (TCLP)] shall
be performed at the frequency specified in Attachment A, and the Permittee shall maintain these results
for a minimum of five years. Any exceptions from the requirements in this condition shall be specified
in Attachment A.
The TCLP analysis shall include the following parameters (the regulatory level in milligrams per liter
is in parentheses):
Arsenic (5.0)
1,4-Dichlorobenzene (7.5)
Nitrobenzene (2.0)
Barium (100.0)
1,2-Dichloroethane (0.5)
Pentachlorophenol (100.0)
Benzene (0.5)
1, 1 -Dichloroetbylene (0.7)
Pyridine (5.0)
Cadmium (1.0)
2,4-Dinitrotoluene (0,1.3)
Selenium (1.0)
Carbon tetrachloride (0.5)
Endrin (0.02)
Silver (5.0)
Chlordane (0.03)
Hexachlorobenzene (0.13)
Tetrachloroethylene (0.7)
Chlorobenzene (100.0)
Heptachlor (and its hydroxide)
(0.00s
Toxaphene (0.5)
Chloroform (6.0)
Hexachloro-1,3-butadiene (0.5)
Trichloroethylene (0.5)
Chromium (5.0)
Hexachloroethane (3.0)
2,4,5-Trichlorophenol (400.0)
m-Cresol (200.0)
Lead (5.0)
2,4,6-Trichlorophenol (2.0)
o-Cresol (200.0)
Lindane (0.4)
2,4,5-TP (Silvex) (1.0)
p-Cresol (200.0)
Mercury (0.2)
Vinyl chloride (0.2)
Cresol (200.0)
Methoxychlor (10.0)
2,4-D (10.0)
Methyl ethyl ketone (200.0)
Once the residuals have been monitored for two years at the frequency specified in Attachment A, the
Permittee may submit a permit modification request to reduce the frequency of this monitoring
requirement. In no case shall the monitoring frequency be less than once per permit cycle.
[15A NCAC 13A .0102(b), 02T .1101, 02T .1105]
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3. An analysis shall be conducted on residuals from each source generating facility at the frequency
specified in Attachment A, and the Permittee shall maintain the results for a minimum of five years.
The analysis shall include the following parameters:
Arsenic
pH
Nickel
Chromium
Percent Total Solids
The Permittee may utilize test methods in the most -recent update of the document entitled "Test
Methods for Evaluating Solid Waste, Physical/Chemical Methods (SW-846)," published by the United
States Environmental Protection Agency's Office of Solid Waste, for the analysis of the metal
parameters. Analytical results for the metal parameters shall be reported on a dry weight basis.
[15A NCAC 02T .1101 ]
4. Residuals generated by the approved residuals source -generating facility listed in Condition I.4. shall be
analyzed to demonstrate that they are non -hazardous under RCRA with respect to chromium leachability (i.e.,
leachate from a TCLP analyzed for chromium only).
The following sampling schedule shall be followed:
a. Grab sample: One per month, minimum.
b. Composite sample: One per month, minimum.
The results of all analytical determinations shall be maintained on file by the Permittee for a minimum of five
years and shall be submitted on a yearly basis to the following address:
Water Quality Regional Operations Section Supervisor
Wilmington Regional Office
NCDENR-DWQ
127 Cardinal Drive Extension
Wilmington, North Carolina 28405-3845
[I5ANCAC 02T .0108(b)(1)]
5. If the residuals are not covered by soil or other material at the end of each operating day, residuals shall
be monitored for compliance with vector attraction reduction requirements at the frequency specified
in Attachment A as per the requirements of I SA NCAC 02T .1107 (a), and at the time indicated in the
sampling and monitoring sections of the approved O&M. plan. Any exceptions from the requirements
in this condition shall be specified in Attachment A. [15A NCAC 02T .1106, 02T .1107, 02T .1111(c)]
6. Laboratory parameter analyses shall be performed on the residuals as they are disposed, and shall be in
accordance with the monitoring requirements in 15A NCAC 02B .0505. [15A NCAC 02B .05051
7. Monitor wells shall be sampled after construction and within three months prior to initiating surface
disposal operations. Monitoring wells shall be sampled thereafter at the frequencies and for the
parameters specified in Attachment C. All mapping, well construction forms, well abandonment forms
and monitoring data shall refer to the permit number and the well nomenclature as provided in
Attachment C and Figure. [ 15A NCAC 02T .0105(m)]
8. For initial sampling of monitoring wells, the Permittee shall submit a Compliance Monitoring Form
(GW-59) and a Well Construction Record Form (GW-1) listing this permit number and the appropriate
monitoring well identification number. Initial Compliance Monitoring Forms (GW-59) without copies
of the Well Construction Record Forms (GW-1) are deemed incomplete, and may be returned to the
Permittee without being processed. [15A NCAC 02T .0105(m)]
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9. Two copies of the monitoring well sampling and analysis results shall be submitted on a Compliance
Monitoring Form (GW-59), along with attached copies of laboratory analyses, on or before the last
working day of the month following the sampling month. The Compliance Monitoring Form (GW-59)
shall include this permit number, the appropriate well identification number, and one GW-59a
certification form shall be submitted with each set of sampling results. All information shall -be
submitted to the following address:
Division of Water Resources
Information Processing Unit
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
[I 5A NCAC 02T .0105(m)]
10. Proper records shall be maintained by the Permittee tracking all residuals surface disposal events. These records
shall include, but are not necessarily limited to, the following information:
a. Date and freeboard level measurements in Quarry ISection I and Quarry/Section II; of the surface disposal
unit;
b. Source and date of disposal in the surface disposal unit for the residuals or limestone tailings from the
adjacent Martin Marietta Materials, Inc. mining operation;
c. Volume of residuals or limestone tailings from the adjacent Martin Marietta Materials, Inc. mining
operation disposed of in Quarry USection I and Quarry USection II of the surface disposal unit in gallons
per year, dry tons per year, or kilograms per year;
d. Cumulative volume of residuals or limestone tailings from the adjacent Martin Marietta Materials, Inc.
mining operation disposed of in Quarry ISection I and Quarry USection H of the surface disposal unit in
gallons or cubic yards (i.e., excluding freeboard);
e. Remaining volume in Quarry ISection I and Quarry ISection II of the surface disposal unit in
gallons or cubic yards (i.e., excluding freeboard); and
f. An estimate of the remaining useful disposal life for Quarry USection I and Quarry I/Section II of
the surface disposal unit in years (i.e., excluding freeboard).
[ 15A NCAC 02T .0109(a)]
11. Three copies of an annual report shall be submitted on or before March 111. The annual report shall
meet the requirements described in the Instructions for Residuals Application Annual Reporting Forms.
Instructions for reporting and annual report forms are available at
http:I/portal.ncdenr.orglweb/wqlaps/lau/reporting, or can be obtained by contacting the Land
Application Unit directly. The annual report shall be submitted to the following address:
Division of Water Resources
Information Processing Unit
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
[15A NCAC 02T .I I I l(a)]
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12. Noncompliance Notification
The Permittee shall report by telephone to the Wilmington Regional Office, telephone number (910)
796-7215, as soon as possible, but in no case more than 24 hours or on the next working day following
the occurrence or first knowledge of the occurrence of any of the following:
a. Surface disposal of residuals abnormal in quantity or characteristic.
b. Any failure of the surface disposal program resulting in a release of material to surface waters.
c. Any time sell -monitoring indicates the facility has gone out of compliance with its permit
limitations.
d. Any process unit failure, due to known or unknown reasons, rendering the facility incapable of
adequate residual treatment.
e. Any spill or discharge from a vehicle or piping system during residuals transportation.
Any emergency requiring immediate reporting (e.g., discharges to surface waters, imminent failure of
a storage structure, etc.) outside normal business hours shall be reported to the Division's Emergency
Response personnel at telephone number [phone], [phone], or [phone].
Persons reporting such occurrences by telephone shall also file a written report in letter form within
five days following first knowledge of the occurrence. This report shall outline the actions taken or
proposed to be taken to ensure that the problem does not recur. [15A NCAC 02T .0105(1), 02T
.0108(b)(1)]
V. INSPECTIONS
1. The Permittee shall provide adequate inspection and maintenance to ensure proper operation of the
subject facilities and shall be in accordance with the approved O&M Plan. [15A NCAC 02T .0108(b)]
2. Prior to each bulk residuals surface disposal event, the Permittee or his designee shall inspect the
residuals storage, transport and disposal facilities to identify malfunctions, facility deterioration and
operator errors that could result in discharges to the environment, a threat to human health or a public
nuisance. The Permittee shall maintain an inspection log that includes, at a minimum, the date and time
of inspection, observations made, and any maintenance, repairs, or corrective actions taken. The
Permittee shall maintain this inspection log for a period of five years from the date of inspection, and
this log shall be made available to the Division upon request. [15A NCAC 02T .0108(b)]
3. Any duly authorized Division representative may, upon presentation of credentials, enter and inspect
any property, premises or place on or related to the surface disposal sites or facilities permitted herein
at any reasonable time for the purpose of determining compliance with this permit; may inspect or copy
any records required to be maintained under the terms and conditions of this permit; and may collect
groundwater, surface water or leachate samples. [G.S. 143-215.3(a)(2)]
VI. GENERAL CONDITIONS
1. Failure to comply with the conditions and limitations contained herein may subject the Permittee to an
enforcement action by the Division in accordance with North Carolina General Statutes 143-215.6A to
143-215.6C. [G.S. 143-215.6A to 143-215.6C]
2. This permit shall become voidable if the residuals surface disposal events are not carried out in
accordance with the conditions of this permit. [15A NCAC 02T .0110]
3. This permit is effective only with respect to the nature and volume of residuals described in the permit
application and other supporting documentation. [G.S. 143-215.1]
WQ0001492 Version 4.0 Shell Version 160210 Page 9 of 10

4. The issuance of this permit does not exempt the Permittee from complying with any and all statutes,
rules, regulations, or ordinances, which may be imposed by other jurisdictional government agencies
(e.g., local, state, and federal). Of particular concern to the Division are applicable river buffer rules in
15A NCAC 02B .0200; erosion and sedimentation control requirements in 15A NCAC Chapter 4 and
under the Division's General Permit NCG010000; any requirements pertaining to wetlands under 15A
NCAC 02B .0200 and 02H .0500; and documentation of compliance with Article 21 Part 6 of Chapter
143 of the General Statutes. [15A NCAC 02T .0105(c)(6)]
In the event the residuals program changes ownership or the Permittee changes his name, a formal
permit modification request shall be submitted to the Division. This request shall be made on official
Division forms, and shall include appropriate documentation from the parties involved and other
supporting documentation as necessary. The Permittee of record shall remain fully responsible for
maintaining and operating the residuals program permitted herein until a permit is issued to the new
owner. [15A NCAC 02T .0104]
6. This permit is subject to revocation or unilateral modification upon 60-day notice from the Division
Director, in whole or part for the requirements listed in 15A NCAC 02T .0110. [15A NCAC 02T .0110]
7. Unless the Division Director grants a variance, expansion of the permitted residuals program contained
herein shall not be granted if the Permittee exemplifies any of the criteria in 15A NCAC 02T .0120(b).
[15A NCAC 02T .0120]
8. The Permittee shall pay the annual fee within 30 days after being billed by the Division. Failure to pay
the annual fee accordingly shall be cause for the Division to revoke this permit. [I 5A NCAC 02T
.0105(e)(3)]
Permit issued this the 25"' day of July 2016
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
S. Jay Zimmerman, P.G., Director
Division of Water Resources
By Authority of the Environmental Management Commission
Permit Number WQ0001492
WQ0001492 Version 4.0 Shell Version 160210 Page 10 of 10

ATTACHMENT A - Approved Residual Sources
Occidental Chemical Corporation
Certification Date: July 25, 2016
Permit Number: WQ0001492 Version: 4.0
Maximum
Monitoring
Monitoring
Monitoring
Approved
Owner
Facility Name
County
Permit
Biological
Dry Tons
Frequency for
Frequency for
Frequency for
Mineralization
Number
Residuals
per Year I
Non -hazardous
Metals and
Vector Attraction
gate
Characteristics 2
Nutrients 3, 5
Reduction 4, 5
Elementis Chromium Castle
Elementis Chromium, L.P.
Hayne Manufacturing
NC0003875
No
171,000
Annually
See Table Below
NONE
-
Facility WWTP
Hannover
Total
171,000
1. Maximum Dry Tons per Year is the amount of residuals approved for surface disposal from each permitted facility.
2. Analyses to demonstrate that residuals are non -hazardous (i.e., TCLP, ignitability, reactivity, and corrosivity) as stipulated under permit Condition IV.2_
3. Testing of metals and nutrients as stipulated under permit Condition W.3.
4. Analyses of vector attraction reductions as stipulated under permit Condition IV.5. NONE indicates that the residuals are covered by soil or other material at the end of each operating day or that
the residuals are non -biological.
5. Monitoring frequencies are based on the actual dry tons applied per year using the table below, unless specified above_
Dry Tons Disposed
short tons per ear
Monitoring Frequency
Established in 40 CFR 503 and 15A NCAC 02T .1111
<319
1/Year
=>319 - <1,650
l/ Quarter (4 times per ear)
=>1,650 - <16,500
1/60 Days (6 times per year)
=>16,500
1/month 12 times per ear)
If no surface disposal events occur during a required sampling period (e.g. no surface disposal occur during an entire year when annual monitoring is required), then no
sampling data is required during the period of inactivity. The annual report shall include an explanation for missing sampling data. Those required to submit the annual
report to EPA may be required to make up the missed sampling, contact the EPA for additional information and clarification.
WQ0001492 Version 4.0 Attachment A Page I of 1

THIS PAGE BLANK

ATTACHMENT B - Approved Surface Disposal Sites
Occidental Chemical Corporation
Certification Date: July 25, 2016
Permit Number: WQ0001492 Version: 4.0
Field/ Site
Owner
Lessee
County
Latitude
Longitude
Acret a
Dominant Soil Series
Footnotes
Quarry I / Section I
Occidental Chemical Corporation
New Hanover
34' 22' 15"
770 52' 09"
96.0
NIA
Quarry I / Section II
Occidental Chemical Corporation
New Hanover
34' 21' 56"
77" 52' 18"
70.6
NIA
Total
166.6
WQ0001492 Version 4.0 Attachment B Page I of I

THIS PAGE BLANK

ATTACHMENT C - Groundwater Monitoring and Limitations
Occidental Chemical Corporation
Permit Number: WQ0001492 Version: 4.0
Monitoring wells: MW-1, MW-2, MW-3, MW-8, MW-9, MW-10, MW-11, MW-12, MW-13, MW-14, MW-15, MW-16, MW-17, MW-18, MW-19, MW-
20, MW-21, MW-22, MW-23, MW-24, MW-25, MW-26, MW-27, and NM-28
GROUNDWATER CHARACTERISTICS
GROUNDWATER STANDARDS
MONITORING REQUIREMENTS
PCS Code
Parameter Description
Daily Maximum
Frequency Measurement
Sample Type
Footnotes
00940
Chloride (as Cl)
250
mg/L
2 x Year
Grab
1,4
01034
Chromium, Total (as. Cr)
10
µg/L
2 x Year
Grab
1,4
01045
Iron, Total (as Fe)
300
µg/L
2 x Year
Grab
1,4
0.1067
Nickel, Total (as Ni)
100.
ug/L
2 x Year
Grab
1,4
00400
pH
6.5 > pH > 8.5
s.u.
2 x Year
Grab
1,4
70300
Solids, Total Dissolved 180°C
500
mg/L
2 x Year
Grab
1,4
82546
Water Level, Distance from Measuring Point
feet
2 x Year
Grab
1, 2, 3, 4
1. 2 x Year monitoring shall be conducted in July & November.
2. The measurement of water levels shall be made prior to purging the wells. The depth to water in each well shall be measured from the surveyed point on the top of the casing. The measurement of
pH shall be made after purging and prior to sampling for the remaining parameters.
3. The measuring points (top of well casing) of all monitoring wells shall be surveyed to provide the relative elevation of the measuring point for each monitoring well. The measuring points (top of
casing) of all monitoring wells shall be surveyed relative to a common datum.
4. Monitoring wells shall be reported consistent with the nomenclature and location information provided in Figure and this attachment. The table shows the correspondence between the
ID used in this Permit and shown on the map and the Facility ID
Permit ID
Facility ID
MW1
CPW-13S
MW2
CPW-14S
MW3
CPW-15S
MW8
CPW-8DR
MW9
CPW-9D.
MW 10
CPW-10D
MWII
CPW-IS
MW 12
CPW-12D
MW13
CPW-13D
MW14
CPW-14D
MW 15
CPW-15D
MW16
CPW-6S
MW 17
CPW-7S
MW18
CPW-8S
MWI9
CPW-9S
MW20
CPW-105
MW21
CPW-5S
WQ0001492 Version 4.0 Attachment C Page 1 of 2

ATTACHMENT C — Groundwater Monitoring and Limitations
Occidental Chemical Corporation
MW22
CPW-2D
MW23
CPW-3D
MW24
CPW-4D
MW25
CPW-5D
MW26
CPW-6D
MW27
CPW-7D
MW28
CPW-12S
Permit Number: WQ0001492 Version: 4.0
WQ0001492 Version 4.0 Attachment C Page 2 of 2

►Jl l E
Residuals Surface
Disposal Units (Quarry �- .--� w
- - -- _ _
Sections I & 2) Ge enT,
j
Residuals Source
Generation Area `
! 4
ilk
`�- ' `4 , ft �(Jf} 1 !i J ! V
Shoulder
APPROXIMATE
N 0 2000 4000
SCALE IN FEET
U.S.G.S. QUADRANGLE MAP
SCOTTS HILL, CASTLE HAYNE, MOORETOWN, AND
ROCY POINT, NC 1997
QUADRANGLE
7.5 MINUTE SERIES (TOPOGRAPHIC)
TITLE TOPOGRAPHIC MAP
PROJEcdCCIDENTAL CHEMICAL CORPORATION
[J SDRS PERMIT NO. WQ0001492
CASTLE HAYNE MANUFACTURING FACILITY
CASTLE HAYNE, NEW HANOVER COUNTY, NC
hart I—%w h is k m a n 2923 South Tryon Street -Suite 1OO
Charlotte, North Carolina 28203
704-586-0007 (p) 704-586-0373 (t)
SMARTER ENVIRONMENTAL SOLUTIONS
DATE: 1-11-16 REVISION NO. 0
JOB NO. OXY-001 FIGURE NO. 1

APPROXIMATE
N 0 1,350 2,700
SCALE IN FEET
ITITLE VICINITY MAP I
" `ACCIDENTAL CHEMICAL CORPORATION
SDRS PERMIT NO. WQ0001492
CASTLE HAYNE MANUFACTURING FACILITY
CASTLE HAYNE, NEW HANOVER COUNTY, NC
.14
hart "%a; n 1 C k k l l a n 2923 South Tryon Sttcet-Suite 100
Charlotte, North Carolina 29203
704-586-0007 (p) 704-596-0373 (t)
SMARTER EWRONMENTAL SOLUMNS
DATE: 1-11-16 1 REVISION NO. 0

NORTHEAST CAPE FEAR RIVER _
STURGEON
CREEK —
I i
CPW-10D
W
CPW-15S v t
MARTIN-MARIETTA j y'l rr 1I i 1 ~ f CPW-15D`: 11
AGGREGATES
PROPERTY 1 1 I r✓ b- T
PW-14D
`CPW-145
QUARRY SECTION #1
APPROXIMATELY 70 ACRES
APPROXIMATE
0 SOD 1.200
SCALE IN FEET
NnRry'gSrc
CPW-BDR �
\ ��3
.'
APPROXIMATELY 97 ACRES
�T \
U ` /1// \•�_ /
RE-ROUTED , I CPW-12S- /
..� STURGEON CREEK
CPW-12D
CANRL a `' CPW-13D'*CPW 1 S/' - -
MARTIN- ETTA
/ � E
AGGREGAT PROPERTY
2 flr »LCWAS �\ .. - - -
C! LCW-1D�
R1
MARTIN-MARIETTA
AGGREGATES PROPERTY
LEGEND
— - PROPERTY LINE
SURFACE WATER FEATURE
- -- - - - - - QUARRY LIMITS (RESIDUALS SURFACE DISPOSAL UNITS)
- — — - COMPLIANCE BOUNDARY
— — — REVIEW BOUNDARY
RAILROAD TRACKS
UPPER AQUIFER (SHALLOW) MONITOR WELL
0 LOWER AQUIFER (DEEP) MONITOR WELL
h�
NOTES
1. OCCIDENTAL CHEMICAL CORPORA11ON IS THE CURRENT SURFACE DISPOSAL OF
RESIDUAL SOLIDS ISDRS) PERMIT HOLDER AND SITE PROPERTY OWNER. ELEMENTIS
CHROMIUM OWNS AND OPERATES THE CHROMIUM MANUFACTURING FACILITY WWTP
WHICH GENERATES RESIDUAL SOLIDS PLACED IN THE QUARRY.
2. THERE ARE NO APPLICABLE STRUCTURES, FACILITIES, OR FEATURES LOCATED WITHIN
THE MINIMUM SETBACK DISTANCES ESTABLISHED IN 15A NCAC 02T,1108(C) OF THE
RESIDUALS SOURCE GENERATION AREA OR RESIDUALS SURFACE DISPOSAL UMTS.
3. THE COMPLIANCE BOUNDARY FOR QUARRY SECTION 1 (PERMITTED PRIOR TO
1213111983) IS ESTABLISHED AT 500 FT FROM THE SURFACE DISPOSAL UNIT OR AT THE
PROPERTY BOUNDARY, WH30HEVER IS CLOSEST TO THE DISPOSAL UNIT.
4, THE COMPLIANCE BOUNDARY FOR QUARRY SECTION 2 (PERMITTED AFTER 1MI/19631
IS ESTABLISHED AT 250 FT FROM THE SURFACE DISPOSAL UNIT OR 50 FT WITHIN THE
PROPERTY BOUNDARY, WH$CHEVER IS CLOSEST TO THE DISPOSAL UNIT.
1
r
/
CPW-7D
/ CPW-7S
CLOSE
J
CPW-1ST
/
0 FORMER
JIAGOON
IRO IUM
/eL, __ CPW-2D
mar
SITE MAP
RESIDUALS SI
GENERATION
W...
WELL IDENTIFICATION LIST
CURRENT
PERMIT ID
PROPOSEDID
FOR RENEWED
PERMIT
MW-1
CPW-13S
MW-2
CPW-145
MW-3
CPW-15S
MW-B
I CPW-8DR
MW-9
CPW-9D
MW-10
CPW-10D
MW-11
CPW-1S
MW-12
CPW-12D
MW-13
CPW-13D
MW-14
CPW-14D
MW-15
CPW-15D
MW-16
CPW-6S
MW-17
CPW-7S
MW-18
CPW-8S
MW-19
CPW-198
MW-20
CPW-1Qs
MW-21
CPW�Bs
MW-22
CPW-2D
MW-23
CPW-3D
MW-24
CPW4D
MW-25
CPW-5D
MW-26
CPW-6D
MW-27
CPW-7D
MW-28
CPW-12S
CPW-6D ft tF? gMP l
— —CPW-3D
PR""" OCCIDENTAL CHEMICAL CORPORATION
SDRS PERMIT NO. WQ0001492
CASTLE HAYNE MANUFACTURING FACILITY
CASTLE HAYNE, NEW HANOVER COUNTY, NC
l
hart 4 hickman
SMARIHI H1VRo17M91dL 9P1,IIf10F15
2923 South Tryon Street -Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(o
License # C-1269 / #C-245 Geology
I DATE: 0 1 -11-16 1 REVISION NO. 0 1
JOB NO.OXY-001
ATTACHMENT NO. 1