WQ0001492_Renewal Application_20210302

Initial Review
Reviewer Thornburg, Nathaniel
Is this submittal an application? (Excluding additional information.)*
r Yes r No
Permit Number (IR)* WQ0001492
Applicant/Permittee Occidental Chemical Corporation
Applicant/Permittee Address 5 Greenway Plaza, Ste 110, Houston, TX77046
Is the owner in BIMS? r Yes r No Is the facility in BIMS? r Yes r No
Owner Type Organization
Facility Name Elementis Chromium Castle Hayne Manufacturing Facility
County New Hanover
Fee Category Major
Is this a complete
application?*
c Yes r No
Signature Authority
Signature Authority Title
Signature Authority Email
Document Type (if non -application)
Email Notifications
Does this need review bythe hydrogeologist?* r Yes r No
Regional Office
CO Reviewer
Admin Reviewer
Fee Amount $0
Complete App Date 03/02/2021
Below list any additional email address that need notification about a new project.
Email Address
Comments to be added to email notfication
Comments for Kendall
Comments for RO

Comments for Reviewer
Comments for Applicant

Submittal Form
Project Contact Information
Rease provide information on the person to be contacted by N B Staff regarding electronic receipt, another correspondence. ittal, confirmation of iptd othd
.......................................................... ronc su_ -
Name * Scott Drury
Email Address*
[e-mail]
Project Information
........ ......... ....................................................................................................................................... .
Application/Document Type* r New (Fee Req ui red)
r Modification - Major (Fee Required)
r Renewal with Major Modification (Fee
Required)
r Annual Report
r Additional Information
r Other
Phone Number*
9194140750
O Modification - Minor
G Renewal
C GW-59, NDMR, NDMLR, NDAR-1,
NDAR-2
r Residual Annual Report
r Change of Ownership
We no longer accept these monitoring reports through this portal. Please click on the link below and it will take you to the correct form.
https://edocs.deq.nc.gov/Forms/NonDischarge_Monitoring_Report
Permit Type:*
r Wastewater Irrigation r High -Rate Infiltration
r Other Wastewater r Reclaimed Water
r Closed -Loop Recycle r Residuals
r Single -Family Residence Wastewater r Other
Irrigation
Permit Number:*
WQ0001492
Has Current Existing permt number
Applicant/Permittee *
Occidental Chemical Corporation
Applicant/Permittee Address*
5 Greenway Plaza, Ste 110, Houston, TX77046
Facility Name *
Elementis Chromium Castle Hayne Manufacturing Facility
Please provide comments/notes
on your current submittal below.
Three hard copies of the permit renewal
application package are also being submitted via
FedEx.
At this time, paper copies are no longer required. If you have any questions about what is required, please contact Nathaniel Thornburg
at [e-mail].
Please attach all information required or requested for this submittal to be reviewed here.*
(Application Form Engineering Rans, Specifications, Calculations, Etc.)
SDR Permit WQ0001492 Renewal Application - Elementis
9.28M6
Chromium Castle Hayne Manufacturing Facility.pdf
Upload only 1 FLFdocurrent (less than 250 W). Miltiple docurrents mist be corrbined into one RJFfile unless file is larger than
upload lint.
* V By checking this box, I acknowledge that I understand the application will not be
accepted for pre -review until the fee (if required) has been received by the Non -
Discharge Branch. Application fees must be submitted by check or money order
and made payable to the North Carolina Department of Environmental Quality
(NCDEQ). I also confirm that the uploaded document is a single PDF with all parts
of the application in correct order (as specified by the application).
Mail payment to:
NCDEQ — Division of Water Resources
Attn: Non -Discharge Branch
1617 Mail Service Center
Raleigh, NC 27699-1617

Signature
Scab! Drt►,��
Submission Date 3/2/2021

Surface Disposal of Residuals Permit
Renewal Application
Occidental Chemical Corporation
Permit No. WQ0001492
Elementis Chromium
Castle Hayne Manufacturing Facility
Castle Hayne, North Carolina
H&H Job No. OXY-004
March 2, 2021
�q
hart
hickman
SMARTER ENVIRONMENTAL SOLUTIONS
#C-1269 Engineering
#C-245 Geology
2923 South Tryon Street, Suite 100 3921 Sunset Ridge Rd, Suite 301
Charlotte, NC 28203 Ralcigh, NC 27607 www.harthirkman.cum
704.586.0007 main 919.847.4241 main

hart hickman
SMARTER ENVIRONMENTAL SOLUTIONS
Via FedEx
March 2, 2021
NC Department of Environmental Quality
Division of Water Resources — Water Quality Permitting Section
Non -Discharge Permitting Unit
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Re: SDR Permit Renewal Application
Occidental Chemical Corporation
Permit No. WQ0001492
Elementis Chromium Castle Hayne Manufacturing Facility
Castle Hayne, North Carolina
H&H Project No. OXY-004
Dear Sir or Madam:
On behalf of Occidental Chemical Corporation (Occidental), Hart & Hickman, PC (H&H) is
providing three copies of a Surface Disposal of Residuals (SDR) Permit Renewal Application
package for the Elementis Chromium Castle Hayne Manufacturing Facility located in Castle
Hayne, New Hanover County, NC (Permit No. WQ0000537). The SDR permit holder is the
property owner Occidental, and Elementis Chromium operates the Elementis Chromium Castle
Hayne Manufacturing Facility. The Elementis Chromium Castle Hayne Manufacturing
Facility's wastewater treatment plant (WWTP) generates residual solids that are currently
disposed in an approximately 170 acre former limestone quarry (the Quarry or the disposal unit)
which is divided into two sections. The Quarry sections are identified as Quarry Section #1 and
Quarry Section #2. The WWTP is operated under Elementis Chromium's National Pollutant
Discharge Elimination System (NPDES) Permit No. NC0003875. This renewal application is
for continued operation of the Quarry for residual solids disposal.
In addition to the enclosed Surface Disposal of Residuals Form: SDR 06-16 and Residual Source
Certification Form: RSC 06-16, the following items are included in the enclosed permit renewal
application package:
• A copy of this cover letter
• Site Map (Attachment A)
• Operation and Maintenance Plan (Attachment B)
• Residuals Source Generation Facility Information (Attachment C)
■ Site Topographic and Vicinity Maps
2923 South Tryon Street, Suite 100 3921 Sunset Ridge Rd, Suite 301
Charlotte, NC 28203 Raleigh, NC 27607 www.harthickman.com
704.586,0007 main 919.847A241 main

Division of Water Resources
March 2, 2021
Page 2
■ Process Flow Narrative
■ Quantitative Justification for Residuals Production Rate
■ Sampling Plan
Residuals Quality Information (Attachment D)
■ Laboratory Analytical Reports
For the renewed permit, Occidental is not requesting any changes to the conditions of the current
permit.
If you have any questions or need additional information, please contact us at [phone].
Sincerely,
Hart & Hickman, PC
Scott Drury, PE
Project Manager
Enclosures (Three Copies of the Permit Renewal Package)
Steve Hart, PG
Principal
cc: Dr. Morella Sanchez -King, PhD, PE, DWR (via email)
Teresa Jordan, PE, Glenn Springs Holdings (via email)
Matt Hamburg, Elementis Chromium (via email)
Sean Coury, PE, Coury Science & Engineering (via email)
hart ` hickman
SMARTER ENVIRONMENTAL SOLUTIONS
S:A_ A -Master Projects\Oxychem\Quarry\Quarry Permit InfoA2021 SDR Permit Renewal\Permit Renewal Cover Letter.docx

State of North Carolina
DWR
Department of Environmental Quality
Division of Water Resources
DlvWon of Water Resources 15A NCAC 02T .1100 — SURFACE DISPOSAL OF RESIDUALS
FORM: SDR 11-15
I. APPLICANT INFORMATION:
1. Applicant's name: Occidental Chemical Corporation
Applicant type: ❑ Individual ® Corporation ❑ General Partnership ❑ Privately -Owned Public Utility
❑ Federal ❑ State ❑ Municipal ❑ County
Signature authority's name per 15A NCAC 02T .0106: Juan Somoano Title: Vice President
Applicant's mailing address: 5 Greenwav Plaza., Ste 110
City: Houston State: TX
Zip: 77046-0521
Telephone number: 713 215-7473
Email Address: Juan somoanoaa,oxy.com
2. Consultant's name: Steve Hart
License Number (for P.E.): N/A
Affiliation: ❑ On Staff ® Retained (Firm: Hart & Hickman, PC)
Consultant's mailing address: 2923 South Tryon St, Ste 100
City: Charlotte State: NC
Zip: 28203-
Telephone number: [phone]
Email Address: shartaa,harthickman.com
3. Soil Scientist's name: N/A
License Number:
Affiliation: ❑ N/A ❑ On Staff
❑ Retained (Firm: )
Soil Scientist's mailing address:
City: State:
Zip: -
Telephone number: (_) ;
Email Address:
4. Fee submitted: $0.00 (See Instruction B)
II. PERMIT INFORMATION:
1. Application is for (check all that apply): ❑ new, ❑ modified, ® renewed permit
2. If this application is being submitted to renew or modify an existing permit, provide the following:
Permit number: W00001492
Date of most -recently issued permit: 09/01/2016
Date of most -recently certified Attachment A (if different than the permit):
Date of most -recently certified Attachment B (if different than the permit):
III. FACILITY INFORMATION:
1. Name of residuals disposal facility: Elementis Chromium Castle Havne Manufacturing Facility
City: Castle Hayne State: NC Zip: 28429-
Coordinates: Latitude: 34' 22' 22" Longitude: 77' 51' 27"
Datum: WGS84 Level of accuracy: I
Method of measurement: Goog�le Earth
County where facility is located: New Hanover
FORM: SDR 06-16 Page 1 of 3

2. Facility contact (person familiar with residuals preparation/disposal):
Name: Matt Hambure Title: Plant Manaaer
Mailing address: 5408 Holly Shelter Rd
City: Castle Hayne State: NC Zip: 28429-
Telephone number: 9( 10) 675-7204 E-mail address: matt.hamburena,elementis.com
IV. PROJECT INFORMATION (This section is not required for permit renewal without modification):
1. If project disturbs more than one acre, provide date when an erosion and sedimentation control plan was submitted to the
Division of Land Resources for approval:
2. If project includes any stream or wetland crossings, provide date when Nationwide 12 or 404 permit was submitted for
approval:
3. Provide buffers used to maintain compliance with any applicable river basin rules in 15A NCAC 2B .0200 (e.g., Neuse River
basin buffer rules):
3. Estimated volume of residuals to be disposed at the facility: (dry tons/year).
4. 100-year flood elevation feet mean sea level. Source:
5. Specify whether the surface disposal unit(s) located:
a. within the 100-year floodplain? ❑ yes or ❑ no
b. in a seismic impact zone? ❑ yes or ❑ no
c. less than 60 meters from a fault that has displacement in Holocene time? ❑ yes or ❑ no
d. within an unstable area? ❑ yes or ❑ no
6. Does the surface disposal unit(s) restrict base flood (100-year flood) flow? ❑ yes or ❑ no
7. Please provide a description of the surface disposal unit(s) (e.g. lagoons, monofil, etc.):
8. Depth of the seasonal high water table: feet.
9. Vertical distance between bottom of the disposal unit to the seasonal high water table: feet. The Division requires a
minimum of three (3) foot separation.
10. Explain how access to the treatment and disposal units, by both human and animals, will be controlled:
11. Describe how runoff will be collected and disposed (The runoff collection system must have the capacity to handle runoff
from a 24-hour, 25-year storm event):
12. Describe the liner for the proposed or existing disposal unit (Attach all construction and design specifications):
13. Describe the leachate collection or decanting system for the disposal unit (Attach all construction and design specifications):
V. RESIDUALS SOURCE INFORMATION: (Required for all new, renewed, or modified residuals source)
Complete and submit the attached Residuals Source Certification and all associated documentation
El
Residuals Source
Certification
FORM: SDR 06-16 Page 2 of 3

Professional Engineer's Certification: (Application Involving New or Changes to Treatment or Surface Disposal Units)
attest that this application for
has been reviewed by me and is accurate and complete to the best of my knowledge. I further attest that to the best of my knowledge
the proposed design has been prepared in accordance with the applicable regulations. Although certain portions of this submittal
package may have been developed by other professionals, inclusion of these materials under my signature and seal signifies that I
have reviewed this material and have judged it to be consistent with the proposed design.
North Carolina Professional Engineer's Seal, Signature, and Date:
Applicant's Certification:
The applicant or any affiliate has not been convicted of an environmental crime, has not abandoned a wastewater facility without
proper closure, does not have an outstanding civil penalty where all appeals have been exhausted or abandoned, are compliant with
any active compliance schedule, and do not have any overdue annual fees under Rule 15A NCAC 02T .0105.
® Yes ❑ No, Explain;
r, Juan Somoano
Vice President, Occidental Chemical Corporation
(Signature Authority's Name — PLEASE PRINT) (Title)
attest that this application for _Elementis Chromium Castle Hayne Manufacturing Facility
(Facility Name)
has been reviewed by me and is accurate and complete to the best of my knowledge. I understand that the Division of Water
Resources may not conduct a technical review of this program and approval does not constitute a variance to any rules or statutes
unless specifically granted in the permit. Further, any discharge of residuals to surface waters or the land will result in an immediate
enforcement action, which may include civil penalties, injunctive relief, and/or criminal prosecution. I will make no claim against the
Division of Water Resources should a condition of this permit be violated. I also understand that if all required parts of this
application are not completed and that if all required supporting information and attachments are not included, this application
package will be returned to me as incomplete.
Note: In accordance with North Carolina General Statutes §143-215.6A and §143-215.6B, any person who knowingly makes any
false statement, representation, or certification in any application shall be guilty of a Class 2 misdemeanor, which may include a fine
not to exceed $10,000 as well as civil penalties up to $25,000 per violation.
Juan P
Signature:
Digitally signed by: Juan P Somoano
Somoano DN: CN = Juan P Somoano email =
juat-semeaA
Date: 2021.03.02 09:04:29-06'00'
FORM: SDR 06-16 Page 3 of 3

State of North Carolina
Department of Environmental Quality
Division of Water Resources
Division of Watef Resources RESIDUALS SOURCE CERTIFICATION
INSTRUCTIONS FOR FORM: RSC 06-16
Please use the following instructions as a checklist in order to ensure all required items are submitted. Adherence to these
instructions and checking the provided boxes will help produce a quicker review time and reduce the amount of additional
information requested. Failure to submit all of the required items will lead to additional processing and review time for the
permit application. Unless otherwise noted, the Applicant shall submit one original and two copies of the application and
supporting documentation
For more information, visit the Water Quality Permitting Section's Non -Discharge Permitting Unit
General — This certification provides detailed information of residuals source generating facility and its residuals quality for land
application, distribution, or disposal in accordance with 15A NCAC 02T .1100. Do not submit this certification for review without
a corresponding application form (FORM: RLAP 11-15, FORM: DCAR 11-15, or FORM: SDR 11-15).
Unless otherwise noted, the Applicant shall submit one original and two copies of the application and supporting documentation listed
below.
A. Residuals Source Certification (FORM: RSC 11-15):
® Submit the completed and appropriately executed Residuals Source Certification (FORM: RSC 11-15) form. Please do not
make any unauthorized content changes to this form. If necessary for clarity or due to space restrictions, attachments to the
application may be made, as long as the attachments are numbered to correspond to the section and item to which they refer.
® For new or renewed permits, submit a separate certification for each source facility.
❑ For modified permits, submit a separate certification for only those facilities that are affected by the proposed modification.
® Complete the residuals source facility summary page. List all new, renewed, or modified facilities.
B. Residuals Source -Generating Facility Information:
® For each source facility, attach the following:
® Vicinity map - A vicinity map that shows the location of the facility and meets all of the criteria in the "Map Guidance for
Residuals Land Application Permits
® Process flow diagram and/or narrative - A detailed narrative and/or process flow diagram that describes how the residuals
are to be generated, treated, processed, and stored at the facility.
® Quantitative justification for residuals production rate - A quantitative justification for the value provided in Item I. 8.
Ensure that the amount of residuals listed is the maximum amount expected to be generated by the facility for the life of
the permit. In addition, ensure that this amount is equivalent to that which is actually to be land applied, distributed,
and/or disposed, including any chemicals, amendments, or other additives that are added to the residuals during
processing.
® Sampling plan - A detailed sampling plan for the residuals source -generating facility. Ensure that the plan identifies
sampling points, sampling frequency, sample type, as well as the Division -certified laboratory to be used. In addition,
ensure that the plan details how the facility and/or the residuals are monitored for any applicable pathogen reduction and
vector attraction reduction requirements. Note that all sampling and monitoring must be completed on the residuals as
they are to be land applied, distributed, and/or disposed.
C. Residuals Quality Information:
® For each source facility, attach the following:
® Laboratory analytical reports and operational data - reports for all laboratory analyses used to complete this certification.
❑ Documentation that the facility complies and/or the residuals comply with any applicable pathogen reduction and vector
attraction reduction requirements.
❑ For new facility that may have not yet been constructed and analytical results of residuals cannot be obtained, please
attach analytical results of residuals generated from a similar facility along with the description of similarities of the two
facilities.
INSTRUCTIONS FOR FORM: RSC 06-16 Page 1 of 1

RESIDUALS SOURCE FACILITY SUMMARY
Applicant's name: Occidental Chemical Corporation
Status
Code a
Facility Permit Holder
Facility Name
County
Permit Number
Maximum Dry Tons Per Year
Current b
Proposed
R
Occidental Chemical
Corporation
Elementis Chromium Castle
Ha ne Manufacturing Facility
New Hanover
SDR: WQ0000537
171,000
171,000
a Status Code for source facility are: ♦ N (New) ♦ R (Renewed) ♦ M (Modified) ♦ D (Deleted)
b The amount of residuals currently permitted for distribution, land application, or disposal (i.e, not applicable to new facility).
SUMMARY FOR FORM: RSC 06-16 Page 1

State of North Carolina
Department of Environmental Quality
_DWRDivision of Water Resources
IV IV
RivKion of Water Resaufces RESIDUALS SOURCE CERTIFICATION
FORM: RSC 06-16
I. RESIDUALS SOURCE -GENERATING FACILITY INFORMATION (See Instruction B.):
1. Facility Name: Elementis Chromium Castle Hayne Manufacturing Facility
2. Facility permit holder is: ❑ Federal, ❑ State, ❑ Local Government, or ® Private.
Facility permit issued by: ® Div. of Water Resources, ❑ Div. of Environmental Health,
or ❑ Other (explain: ).
3. Facility contact person and title: Matt Hamburg?, Plant Manager
Complete mailing address: 5408 Holly Shelter Rd
City: Castle Hayne State: NC Zip: 28429-
Telephone number: 910 675-7204 E-mail address: [e-mail]
4. Facility physical address: 5408 Holly Shelter Rd
City: Castle Hayne State: NC Zip: 28429-
Coordinates: Latitude: 34 22' 22" Longitude: 77. 51' 27"
Datum: WOS84 Level of accuracy: lm
Method of measurement: Google Earth
5. Purpose of the facility:
❑ treatment of municipal wastewater, ❑ treatment of 100% domestic wastewater,
❑ treatment of potable water, ® treatment of 100% industrial wastewater,
❑ treatment of industrial wastewater mixed with domestic wastewater,
(approximate percentages: % industrial and % domestic)
❑ other (explain: ).
6. Does the facility have an approved pretreatment program: ❑ Yes ® No
7. Facility permitted/design flow: 0.785 MGD and facility average daily flow: MGD
8. Average amount of residuals being generated at this facility 100,000 dry tons per year.
9. Specify the following regarding treatment and storage volumes available at the facility:
Type and volume of residuals treatment:
Type and volume of residuals storage (i.e., outside of residuals treatment units):
II. RESIDUALS QUALITY INFORMATION (See Instruction C.):
1. Specify if residuals are regulated under:
❑ 40 CFR Part 503 or ® 40 CFR Part 257.
Note: Only residuals that are generated during domestic/municipal wastewater treatment processes are regulated under 40
CFR Part 503, otherwise, the residuals are regulated under 40 CFR Part 257.
2. Specify if residuals are defined under 15A NCAC 02T.1102(6) as:
❑ Biological ® Non -Biological
Note: Biological residuals are residuals that have been generated during the treatment of domestic wastewater, animal
processing wastewater, or the biological treatment of industrial wastewater (biological treatment is a system that utilizes
biological processes including lagoons, activated sludge systems, extended aeration systems, and fixed film systems).
FORM: RSC 06-16 Pagel of 5

3. Hazardous Waste Determination: Complete the following to demonstrate that the residuals are non -hazardous under
RCRA: (Note - this item does not have to be completed for facilities that are less than 0.5 MGD in design flow that treat
100% non -municipal, domestic wastewater only)
a. Are the residuals listed in 40 CFR §261.31-§261.33: ❑ yes ® no.
If yes, list the number(s):
b. Specify whether or not the residuals exhibit any of the characteristics defined by 40 CFR §261.21-
261.24: ❑ yes ® no.
Fill in the following tables with the results of the latest toxicity characteristic leaching procedure (TCLP) analysis as
well as those for corrosivity, ignitability, and reactivity:
Laboratory: Environmental Chemists, Inc. and Date of analysis: 08/25-27/2020
Passed corrosivity test: ® yes ❑ no. pH: s.u. (2 < pH < 12.5)
Passed ignitability test: ® yes ❑ no. Flashpoint: OF (> 140°F)
Passed reactivity test: ® yes ❑no. HCN: mg/kg (<250) & H2S: mg/kg (<500)
TCLP Parameter
Limit
(Mg/1)
Result
(mg/1)
TCLP Parameter
Limit
(Mg/1)
Result
(Mg/1)
Arsenic
5.0
<1.0
Hexachlorobenzene
0.13
<0.05
Barium
100.0
<1.0
Hexachloro-1,3-Butadiene
0.5
<0.05
Benzene
0.5
<0.01
Hexachloroethane
3.0
<0.05
Cadmium
1.0
<1.0
Lead
5.0
<1.0
Carbon Tetrachloride
0.5
<0.01
Lindane
0.4
<0.0005
Chlordane
0.03
<0.02
Mercury
0.2
<0.0002
Chlorobenzene
100.0
<0.01
Methoxychlor
10.0
<0.0005
Chloroform
6.0
<0.01
Methyl Ethyl Ketone
200.0
<0.05
Chromium
5.0
<1.0
Nitrobenzene
2.0
<0.05
m-Cresol
200.0
<0.05
Pentachlorophenol
100.0
<0.25
o-Cresol
200.0
<0.05
Pyridine
5.0
<0.05
p-Cresol
200.0
<0.05
Selenium
1.0
<1.0
Cresol
200.0
<0.05
Silver
5.0
<1.0
2,4-D
10.0
<0.003
Tetrachloroethylene
0.7
<0.01
1,4-Dichlorobenzene
7.5
<0.05
Toxaphene
0.5
<0.05
1,2-Dichloroethane
0.5
<0.01
Trichloroethylene
0.5
<0.01
i,l-Dichloroethylene
0.7
<0.01
2,4,5-Trichlorophenol
400.0
<0.05
2,4-Dinitrotoluene
0.13
<0.05
2,4,6-Trichlorophenol
2.0
<0.05
Endrin
0.02
<0.0005
2,4,5-TP (Silvex)
1.0
<0.003
Heptachlor and its Hydroxide
0.008
<0.0005
Vinyl Chloride
0.2
<0.01
FORM: RSC 06-16 Page 2 of 5

4. Metals Determination: Complete one of the following tables (i.e., as applicable) to demonstrate that the residuals do not
violate the ceiling concentrations for metals regulated under 15A NCAC 02T .1105.
a. For DistributionlLand Application: Fill in the following table with the results of the latest analyses (i.e., on a dry weight
basis) for the following metal parameters:
Laboratory: and Date of analysis:.
Parameter
Ceiling
Concentration Limits
(ClassA & ClassB)
(mg/kg)
Monthly Average
Concentration Limits
(Class A Only)
(mg/kg)
Result
(mglkg)
Arsenic
75
41
Cadmium
85
39
Copper
4,300
1,500
Lead
840
300
Mercury
57
17
Molybdenum
75
n/a
Nickel
420
420
Selenium
100
100
Zinc
7,500
2,800
b. For Surface Disposal Unit (landfill) Fill in the following table with the results of the latest analyses (i.e., on a dry weight
basis) for the following metal parameters:
Laboratory: Environmental Chemists. Inc. and Date of analysis: 01/12/2021
Distance from Disposal
Unit to Boundary to
Closest Property Line
(meters, check one)
Arsenic
(mg/kg)
Chromium
(mg/kg)
Nickel
(mg/kg)
❑ > 0 but < 25
30
200
210
® > 25 but < 50
34
220
240
❑ >_ 50 but < 75
39
260
270
❑ >_ 75 but < 100
46
300
320
❑ > 100 but < 125
53
360
390
❑ > 125
62
450
420
Result (mglkg)
<4.21
13,100
126
FORM: RSC 06-16 Page 3 of 5

5. Nutrient/Micronutrient Determination: Complete the following:
a. Total solids: %.
b. Fill in the following table with the results of the latest analyses (i.e., on a dry weight basis) for the following nutrient and
micronutrient parameters:
Laboratory: and Date of analysis:
Parameter
Result
(mg/kg)
Aluminum
N/A
Ammonia -Nitrogen
N/A
Calcium
N/A
Magnesium
N/A
Nitrate -Nitrite Nitrogen
N/A
pH (Standard Unit)
N/A
Phosphorus
N/A
Potassium
N/A
Sodium
N/A
Total Kjeldahl Nitrogen
N/A
c. Using the results listed in Item II. 5b. above, calculate the sodium adsorption ration (SAR):
[Note: If residuals contain SAR of 10 or higher, the applicant shall obtain recommendations from the local Cooperative
Extension Office, the Department of Agriculture and Consumer Services, the Natural Resource Conservation Service, a
North Carolina Licensed Soil Scientist, or an agronomist, prior to land application of residuals. The recommendations shall
address the sodium application rate, soil amendments (e.g., gypsum, etc.), or a mechanism for maintaining site integrity
and conditions conducive to crop growth].
d. Specify the mineralization rate to be used in calculating the plant available nitrogen (PAN) of the residuals: %.
This rate is a (check one): ❑ default value, or ❑ actually established.
If the residuals are not generated from the treatment of municipal or domestic wastewater, explain or provide technical
justification as to why the selected default value is appropriate to be applied to these residuals:
e. Calculate the PAN for the residuals (i.e., on a dry weight basis) and fill the results in the following table:
Application Method
First (1") Year PAN
Five -Year
Maximum Adjusted PAN
(mglk8)
(mglkg)
Surface
N/A
N/A
Injection/Incorporation
N/A
N/A
6. Other Pollutants Determination: Specify whether or not there are any other pollutants of concern in the residuals and provide
the results of the latest analyses: There are no other known pollutants of concern
FORM: RSC 06-16 Page 4 of 5

7. Pathogen Reduction: Per 15A NCAC 02T.1 106, specify how residuals will meet the pathogen reduction requirements:
a. For Distribution/Land Application of Class A or Eauivalent.
❑ A fecal coliform density that is demonstrated to be less than 1,000 MPN per gram of total dry solids,
or
❑ A salmonella sp. density that is demonstration to be less than 3 MPN per 4 grams of total dry solids.
AND one of the followings (except for non -biological residuals):
❑ Alternative 1 [15A NCAC 02T.I 106(b)(3)(A)] - Time/Temperature Compliance.
❑ Alternative 2 [15A NCAC 02T.1106(b)(3)(B)] - Alkaline Treatment.
❑ Alternative 3 [15A NCAC 02T.I 106(b)(3)(C)] - Prior Testing for Enteric Virus/Viable Helminth Ova.
❑ Alternative 4 [15A NCAC 02T.I 106(b)(3)(D)] - No Prior Testing for Enteric Virus/Viable Helminth Ova.
❑ Alternative 5 [ 15A NCAC 02T.I 106(b)(3)(E)-(K)] - Process to Further Reduce Pathogens (PFRP).
Specify one: ❑ composting, ❑ heat drying, ❑ heat treatment,
❑ thermophilic aerobic digestion, ❑ beta ray irradiation,
❑ gamma ray irradiation, or ❑ pasteurization.
b. For Land Application of Class B:
❑ Alternative 1 [15A NCAC 02T.1106(c)(1)] -Fecal Coliform Density Demonstration.
❑ Alternative 2 [15A NCAC 02T. I 106(c)(2)] - Process to Significantly Reduce Pathogens (PSRP).
Specify one: ❑ aerobic digestion, ❑ air drying, ❑ anaerobic digestion,
❑ composting, or ❑ lime stabilization.
c. For Surface Disposal:
❑ Select One of the Class A or Equivalent Pathogen Reduction Alternatives in Item II. 7a. above.
❑ Select One of the Class B or Equivalent Pathogen Reduction Alternatives in Item II. 7b. above.
❑ Exempt -If Daily Cover Alternative is chosen in Item I1.8. below [15A NCAC 02T.1106(a)(2)].
® Not Applicable - Non -Biological Residuals with NO Domestic Wastewater Contribution.
8. Vector Attraction Reduction (VAR): Per 15A NCAC 02T.1107, specify how residuals will meet the VAR requirements:
❑ Alternative 1 [ 15A NCAC 02T. 1107(a)(1)] - 38% Volatile Solids Reduction (Aerobic/Anaerobic Digestion).
❑ Alternative 2 [15A NCAC 02T.I 107(a)(2)] - 40-Day Bench Scale Test (Anaerobic Digestion).
❑ Alternative 3 [15A NCAC 02T.I 107(a)(3)] - 30-Day Bench Scale Test (Aerobic Digestion).
❑ Alternative 4 [15A NCAC 02T. 1107(a)(4)] - Specific Oxygen Uptake Rate Test (Aerobic Digestion).
❑ Alternative 5 [15A NCAC 02T.1107(a)(5)] - 14-Day Aerobic Processes.
❑ Alternative 6 [15A NCAC 02T.1107(a)(6)] - Alkaline Stabilization.
❑ Alternative 7 [15A NCAC 02T.1107(a)(7)] - Drying of Stabilized Residuals.
❑ Alternative 8 [15A NCAC 02T.1107(a)(8)] - Drying of Unstabilized Residuals.
❑ Alternative 9 [15A NCAC 02T.I 107(a)(9)] - Injection.
❑ Alternative 10 [15A NCAC 02T.I107(a)(10)] - Incorporation.
❑ Alternative for Surface Disposal Units Only - Soil/Other Material Cover [15A NCAC 02T.1107(b)(2)].
❑ Not Applicable - Non -Biological Residuals with NO Domestic Wastewater Contribution.
Note: For animal processing residuals, only alternatives 9 or 10 may be chosen due to the nuisance conditions that typically
occur when these residuals are applied and left on the land surface.
FORM: RSC 06-16 Page 5 of 5

Attachment A
Site Map
IN
hart hickP' an
SMAFnR FNVIRANMENTAa 5OLUTIONS

NORTHEAST CAPE FEAR RIVER
- _ 7-
STURGEON
,CREEK
RIVE \ t `� MW-20/CPW-- 10S
RSwAMP / \ MW-9/CI
MW-10/CPW-10D
I MW-3/CPW-15Se
MARTIN-MARIETTA
W-15/CPW-15D'
I 1 /: � �
AGGREGATES
PROPERTY
/Q 1 I�MW-14/CPW-14D /
/./ MW-2/CPW-14S / fr
j � L
(
/ / �- QUARRY SECTION #2 /r
APPROXIMATE
0 600 1,200
SCALE IN FEET
BMW-19/cPW-9s-:: \\
\ 11 -
\ STCgPFF� ,.
MW-18/CPW _8S Z'\
MW-8/CPW-8DR _
QUARRY SECTION #1
APPROXIMATELY 97 ACRES
o
j Z APPROXIMATELY 70 ACRES
Kil
MW-27/CPW-7D
�rMw-17/cPwasn
STUROGEON CREEK \ , \ "'- f� r MW-28ICPW-12S 4ts
MW-12CPW-12D
W-13/CPW-13D l - / ��, / ,ELEMEN
1VITIS �HROI CANAL `\ �BbMW-1/CPW-13S _ — — = J /f PLANTPF
\ — /
c .` - _ _ _ _ \ pR 5 �✓ F MARTIN- IETTA /
w...... - �--a:: J. ✓F AGGREGAT PROPERTY
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
o LOWER AQUIFER (DEEP) MONITOR WELL
0 I
M
CLOSeD FORMER
/LAGOON
/ a7
GENERATION
Ee�
WELL IDENTIFICATION LIST
SDR PERMIT ID
FACILITY ID
MW-1
CPW-13S
MW-2
CPW-14S
MW-3
CPW-15S
MW-8
CPW-8DR
MW-9
CPW-9D
MW-10
CPW-1OD
MW-11
CPW-15
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-9s
MW-20
CPW-10S
MW-21
CPW-5S
MW-22
CPW-2D
MW-23
CPW-3D
MW-24
CPW-4D
MW-25
CPW-5D
MW-26
CPW-6D
MW-27
CPW-7D
MW-28
CPW-125
16/CPW-6D
RIVFR'svv
/ f R SWAMP
PPMW-21/CPW-5S"
/
MW-24
O
/C
R. R. RIW W-11/CPW-1S
LCW-lS W-
LCW-1 D MI-3D— -
do
NOTES
1. OCCIDENTAL CHEMICAL CORPORATION IS THE CURRENT SURFACE DISPOSAL OF
RESIDUAL SOLIDS (SDRS) PERMIT HOLDER AND SITE PROPERTY OWNER. ELEMENTIS
CHROMIUM OWNS AND OPERATES THE CHROMIUM MANUFACTURING FACILITY VWVTP
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 UNITS.
3. THE COMPLIANCE BOUNDARY FOR QUARRY SECTION 1 (PERMITTED PRIOR TO
12/31/1983) IS ESTABLISHED AT 500 FT FROM THE SURFACE DISPOSAL UNIT OR AT THE
PROPERTY BOUNDARY, WHICHEVER IS CLOSEST TO THE DISPOSAL UNIT.
4. THE COMPLIANCE BOUNDARY FOR QUARRY SECTION 2 (PERMITTED AFTER 12/31/1983)
IS ESTABLISHED AT 250 FT FROM THE SURFACE DISPOSAL UNIT OR 50 FT WITHIN THE
PROPERTY BOUNDARY, WHICHEVER IS CLOSEST TO THE DISPOSAL UNIT.

Attachment B
Operation and Maintenance Plan
IN
hart hickP' an
SMAFnR FNVIRANMENTAa 5OLUTIONS

ELEMENTIS CHROMIUM CASTLE HAYNE
MANUFACTURING FACILITY
SURFACE DISPOSAL OF RESIDUALS
PERMIT NO. WQ0001492
OPERATION AND MAINTENANCE PLAN
Updated January 2021

1.0 OPERATION OF THE RESIDUALS MANAGEMENT PROGRAM
In accordance with 15A NCAC 02T . 1110, Elementis Chromium (Elementis) has developed this
Operation and Maintenance Plan for continued disposal of residual solids in accordance with
Surface Disposal of Residuals Permit No. WQ0001492 (the SDR Permit) at the Elementis
Chromium Castle Hayne Manufacturing Facility located in Castle Hayne, NC (the Facility).
Occidental Chemical Corporation (Occidental) owns the Facility land parcels and is the SDR
Permittee, and Elementis owns and operates the Facility. The Facility's waste water treatment
plant (WWTP) generates residual solids that are currently disposed in an approximately 170-acre
former limestone quarry (the Quarry or surface disposal unit) which is divided into two sections
by an earthen wall. The Quarry sections are identified as Quarry Section 41 and Quarry
Section 42.
Elementis has a Quarry License Agreement with Occidental which allows for the disposal of a
maximum of 171,000 dry tons of treated residual solids and crushed limestone per year into
Quarry Section 42. The Quarry License Agreement permits Elementis and its contractors and
subcontractors to enter the Quarry property and perform the duties of the SDR Permittee as
outlined in the SDR Permit and the license agreement. These duties include, but are not limited
to, sampling of supernatant and residual solids placed into Quarry Section 42. Elementis also
holds NPDES Permit Number NC0003875 which allows facility wastewater to be treated and
discharged to the Northeast Cape Fear River. Occidental is responsible for compliance
groundwater monitoring required by the SDR Permit. In addition, Occidental is responsible for
the non -routine repair and the closure of Quarry Section 41.
Current manufacturing operations at the Facility typically generate 604,800 gallons of treated
residual slurry each day, with a maximum design capacity of 832,000 gallons per day. The slurry
solids content ranges from 12 percent to 26 percent, and is typically around 18 percent. The
residual slurry consists of 100% industrial process residue resulting from Facility manufacturing
processes and does not include any biological content. Quarry Section 42 is currently receiving
residual slurry through a 5-inch force main. The force main is divided into a primary line of
schedule 40 steel and PVC pipe and a similarly constructed secondary line. The PVC pipe
discharges into the Quarry and is supported on floating pontoons, added as necessary to disperse
the residuals evenly.
Stormwater runoff from the Facility is not allowed to drain into the Quarry. A large portion of
the stormwater that falls around the Plant area is collected and treated on -site in the facility's
NPDES-permitted wastewater treatment facility. The quarry is equipped with measures to
control rainwater, and is designed to maintain a minimum two -foot freeboard for protection
during the 100-year flood event.
As a direct result of severe weather, in the form of three named Hurricanes, which made landfall
near the facility from 1997 through 1999, the perimeter dike walls around the Quarry were
elevated to 12.33 feet above mean sea level (MSL).
Page 1 of 7

2.0 QUARRY MAINTENANCE AND EQUIPMENT INSPECTION AND
DOCUMENTATION
2.1. Quarry maintenance activities and associated operational equipment are routinely inspected
to prevent malfunctions and deterioration. A full inspection of the Quarry is conducted each
weekday, except holidays, by the designated Elementis HSE Department person. The date and
time of each inspection is recorded in the Quarry Inspection Logbook. In the event that an
inspection cannot be conducted on any given day due to extraordinary circumstances (primarily
related to severe weather events in which the quarry dike roads become treacherous or
impassible), it shall be noted in the Quarry Inspection Logbook.
2.2. Quarry surface water levels are recorded from permanent staff gauges located in each of the
two Quarry Sections to the nearest 0.01 feet MSL. These levels are recorded daily in the logbook
to document freeboard levels.
2.3. Quarry dikes are visually checked for signs of erosion, other natural or man-made damage,
leakage or any unusual physical conditions. These observations are recorded in the logbook.
2.4. Quarry dikes are visually checked for routine maintenance type requirements; a record of
these observations is maintained in the logbook. These observations include, but are not be
limited to such things as pot -holes in the roadway, the need to cut grass and/or shrubs on the sides
of dike, and the presence of DANGER signs.
2.5. Piping is visually inspected from the WWTP to the Quarry discharge point for leakage or
damage. This is also recorded in the logbook. If a leak from conveyance piping is observed, the
WWTP operator is contacted and instructed to shut down the pipeline immediately. The
conveyance piping is then repaired or replaced, and any released material is recovered and placed
in the Quarry.
2.6. Some areas around the surface disposal unit are secured with a six-foot high security fence
with locked gates to restrict access. In addition, signs have been strategically placed along the
boundary of the fencing to identify Occidental property lines and that no trespassing is allowed.
Signs have also been placed along the Quarry dikes to warn of specific safety hazards such as
steep drop-offs. Daily visual observations are made for the presence or evidence of unauthorized
personnel and vehicles. Observations are specifically made to determine if gates are unlocked
and if gates or fences have been tampered with. Such observations will be noted in the logbook
and the Facility Security Guard, HSE Manager, or Team Leader will be notified. The HSE
Manager or the Team Leader will relay all Quarry -related issues to the attention of the Site
Manager, or his/her delegate and to a representative of Occidental.
Page 2 of 7

3.0 QUARRY SPILL PREVENTION AND RESPONSE PLAN
The following is a spill prevention and control plan for residual solids disposal operations
Precipitation which falls in the Quarry is contained by a perimeter dike with minimum elevation
of 12.33 feet MSL. In order to alleviate the potential run-off of this stormwater to NPDES
permitted outfalls, a minimum of 2 feet of freeboard is maintained in the Quarry (in accordance
with SDR Permit requirements).
The water levels of each quarry section are recorded each weekday. Supernatant from the Quarry
is returned to the Facility's WWTP as needed to control freeboard levels. In addition, supernatant
from can be transferred between the Quarry sections using a portable pump in order to control
freeboard levels in the Quarry.
In the event that a release of residual solids is observed during routine Quarry inspections each
weekday, the designated Elementis HSE Department person will make the appropriate
notification so that leaks and spills can be stopped as quickly as possible. As part of the response,
spills are immediately reported to the Team Leader or HSE Manager. In the event of a release,
the area will immediately be remediated by collecting released material and placing the material
in the Quarry, and completing necessary repairs to prevent additional release of residuals. The
HSE Manager will immediately notify a representative from Occidental (or his/her delegate) in
the event of a spill.
A minimum of one backhoe, one crane, and several pumps are kept on -site at all times and are
available for spill response and clean-up when needed.
During extreme weather events, it may be necessary to bypass the WWTP and discharge
supernatant from the quarry directly to the river to prevent catastrophic failure of the dikes. If a
bypass is anticipated, notification will be provided to the North Carolina Department of
Environmental Quality Division of Water Resources as required under NPDES Permit
NC0003875 Condition Section C 4.b.(I).
Page 3 of 7

4.0 MANAGEMENT COMMITMENTS
The following personnel are responsible for implementing the Spill Prevention and Response
Plan.
4.1 OCCIDENTAL SITE MANAGER
The Occidental Site Manager has the overall responsibility for compliance with the terms and
conditions of the SDR Permit. Upon notification of a potential non-compliance event from the
Elementis Site Manager, the Occidental Site Manager and Elementis Site Manager will agree on
who is responsible for making non-compliance notifications. Non-compliance notifications are
required by telephone to the Wilmington Regional Office, telephone number [phone], as
soon as possible, but in no case more than 24 hours or on the next working day following the
occurrence. Additionally, a written letter report must be submitted within five days following
first knowledge of the non -compliant event. The report must specifically outline the actions
taken or proposed to be taken to avoid recurrence of the non-compliance event.
For an event that requires immediate reporting (e.g., discharge to surface waters or imminent
failure of a storage structure, etc.) outside normal business hours, a report must be made to the
Division's Emergency Response personnel at telephone number [phone], [phone],
or [phone].
4.2 ELEMENTIS SITE MANAGER
The Elementis Site Manager has the overall responsibility to commit the necessary resources to
properly implement the Spill Prevention and Response Plan including manpower, equipment, and
materials. The Elementis Site Manager also has the overall responsibility to ensure that the
Facility is in full compliance with the terms and conditions of the SDR Permit and with the
Quarry License Agreement.
4.3 ENGINEERING MANAGER
The Engineering Manager has the responsibility to examine the facility and to ensure that the
Spill Prevention and Response Plan has been prepared in accordance with sound engineering
practices.
4.4 HSE Manager
The HSE Manager has the responsibility to notify the Occidental Site Manager of any occurrence
at the surface disposal unit which results in a non-compliance event. In addition, the HSE
Manager will advise operations on issues concerning wastewater treatment and monitoring wells.
The HSE Manager also has the responsibility to ensure that daily Quarry inspections are
conducted properly by qualified personnel. The HSE Manager ensures that the Operator in
Responsible Charge (ORC) for the industrial waste water treatment facility inspects the Quarry at
least weekly. The HSE Manager also has the responsibility to ensure that operations personnel
are properly trained and qualified in the Spill Prevention and Response Plan for each area of the
Facility in which they operate in accordance with the Facility operator training guidelines.
4.5 EMERGENCY RESPONSE TEAM
Members of the Facility's Emergency Response Team have the responsibility to respond to Spill
Prevention and Response emergencies. Elementis also has a Mutual Aid Agreement with Castle
Hayne Fire and Rescue should additional assistance be needed.
Page 4 of 7

4.6 TEAM LEADER
The Team Leader on duty has the responsibility to direct Facility operations that have the
potential to contaminate stormwater runoff through release or exposure of material. In the Team
Leader's absence, this responsibility will default to the Production Manager.
4.7 SAMPLING PERSONNEL
Dean Riggs, Environmental Technician, is currently responsible for collecting samples required
by the SDR Permit. Mr. Riggs collects samples in accordance with SDR Permit requirements at
the direction of the WWTP ORC.
4.8 OPERATOR IN RESPONSIBLE CHARGE
Sean Coury is currently designated as the ORC for the Facility's industrial WWTP. Mr. Coury
holds a Physical/Chemical Grade I license (certification 4991805) and is currently certified under
provisions of Article 3, Charpter 90-A of the General Statutes of North Carolina. As ORC, Mr.
Coury has responsibility of overseeing operation of the WWTP to ensure that discharges to the
surface disposal unit are within SDR-Permitted limits. Additionally, Mr. Coury ensures that
samples are collected in accordance with SDR Permit requirements and makes required
notifications to regulatory agencies. Dean Riggs serves as the back-up ORC for the industrial
WWTP (certification 4995468).
Page 5 of 7

5.0 SAMPLING PROCEDURES
Residuals samples will be collected from the slurry retention tank by personnel designated by the
Elementis WWTP ORC (refer to Sections 4.7 and 4.8 above). Sampling procedures and analyses
are in accordance with SDR Permit requirements. Refer to the Sampling Analysis Plan for
detailed sampling procedures.
Page 6 of 7

6.0 POST -CLOSURE CARE MANAGEMENT
Post -closure care management of the surface disposal unit currently does not apply because unit
has not been closed. When applicable, a detailed closure plan including procedures for post -
closure care management of the surface disposal unit will be developed and submitted to the
Division of Water Quality at least 180 days prior to the closing of the surface disposal unit. A
schedule for implementing the closure plan and the post -closure management care program will
be provided as well.
Page 7 of 7

Attachment C
Residuals Source Generation Facility Information
Site Topographic and Vicinity Maps
Process Flow Narrative
Quantitative Justification for Residuals Production Rate
Residuals Sampling Plan
IN
hart hickP' an
SMAFnR EMlIBAWENTAa 5OLUTIONS

APPROXIMATE
FACILITY
I -
BOUNDARY
n'
Residuals Surface �n
Disposal Unit ' ' _ �� - - - - wr:
�� --
S (Quarry Sections 1 & 2) C:,
/ ,0�
Ck-
Residuals Source
- -, 2 Generation Area
—77
�a
5hauidsr Bran
F •j C
�J f 1�
ly I�l is
APPROXIMATE
N 0 2000 4000
SCALE IN FEET
U.S.G.S. QUADRANGLE MAP
SCOTTS HILL, CASTLE HAYNE, MOORETOWN, AND
ROCKY POINT, NC 1997
QUADRANGLE
7.5 MINUTE SERIES (TOPOGRAPHIC)
NOTE: OCCIDENTAL CHEMICAL CORPORATION IS THE
PERMITEE AND OWNER OF THE FACILITY LAND PARCELS
TITLE
TOPOGRAPHIC MAP
PROJECT
ELEMENTIS CHROMIUM CASTLE HAYNE
MANUFACTURING FACILITY
CASTLE HAYNE, NEW HANOVER COUNTY, NC
SDR PERMIT NO. WQ0001492
14
100
hart � h i C k m a n Chat 5 e, Tryon Carolina
282 3
Charlotte, 1Corrh Carolina 38203
704-596-0007 p) 704-586-U373 It)
SMARTER ENVIRONMENTAL SOLUTIONS
DATE: 02-01-21 REVISION NO. 0
JOB NO. OXY-004 ATTACHMENT C.1

APPROXIMATE
N 0 1,350 2,700
q;:z
SCALE IN FEET
LEGEND
APPROXIMATE FACILITY BOUNDARY
NOTE: OCCIDENTAL CHEMICAL CORPORATION IS THE
PERMITEE AND OWNER OF THE FACILITY LAND PARCELS
TITLE
VICINITY MAP
ELEMENTIS CHROMIUM CASTLE HAYNE
MANUFACTURING FACILITY
CASTLE HAYNE, NEW HANOVER COUNTY, NC
SDR PERMIT NO. WQ0001492
hart h I C k m a n 2923 South Tryon Strcct-Suitt 100
Charlotte, North Carolina 28203
704-386-0007 (p) 704-586-0373 t)
SMARTER ENVIRONMENTAL SOLUnONS
DATE: 02-01-21 1 REVISION NO. 0
JOB NO. OXY-004 I ATTACHMENT C.2

Elementis Chromium's Castle Hayne Plant
Process Description
At Elementis Chromium's Castle Hayne Facility, chromite ore is processed with soda ash,
lime and sulfuric acid to produce several types of hexavalent chromium chemical
compounds. The plant is roughly divided into two parts - the dry end which is primarily
a mineral processing plant, and the wet end which is primarily a chemical processing
facility.
Dry End Process
The dry end process begins with chromite ore which contains about 44-46% chrome
oxide (Cr203). The ore, which is primarily mined in South Africa and transported by
ocean going vessels to Wilmington, is brought into the plant via truck. Since the ore is
stored outside, it is first dried in a rotary dryer before being transferred into one of four
dry ore storage bins via a bucket elevator and screw conveyors. The ore is then fed to
one of four rotary ball mills where it is ground so that more than 95% passes through a
200 mesh screen and then pneumatically conveyed to a storage silo.
Soda ash, or sodium carbonate, is received at the plant in rail cars and pneumatically
conveyed to one of two large storage silos. Lime is received by truck or rail car and
conveyed to a silo by vacuum transfer. Calibrated weigh belts are used to meter the ore,
soda ash, lime, and recycled residue in precise ratios. The feed mix is pneumatically
transported via blow tanks into the three kiln feed bins.
The feed mix is fed into three large, cylindrical, rotary kilns with variable speed screw
conveyors. The kilns are refractory lined and fired with 96 fuel oil to a maximum
temperature of about 2450°F. The feed mix is introduced into the kiln opposite the fuel
burners. The feed material travels the length of the kilns in four to six hours as they
rotate at approximately 40 revolutions per hour. The Cr203 in the ore reacts with the soda
ash and oxygen in the kiln to covert the chromium from trivalent to hexavalent state and
form sodium chromate as shown in the following equation:
Cr203 + 2Na2CO3 + 3/202 4 2Na2C04 + 2CO2
The lime added to the mix prevents unwanted side reactions from occurring during the
kiln roasting process. The recycle residue is added to recover any chrome in the residue
that can still be converted. The gases exiting the kilns are passed through waste heat
boiler to recover as much of the heat as possible in the form of steam. After exiting the
boilers, the gases are introduced into a dry electrostatic precipitator to remove any
particulate matter before being discharged to the atmosphere.
The roast material from the kiln drops into water filled quench tanks where the soluble
sodium chromate leaches from the solids. The resulting quench slurry consists of both
soluble and insoluble metal oxides from the ore, as well as unconverted ore that did not

react in the kiln. The vapors generated in the quench tanks are pulled through venturi
type scrubbers and wet electrostatic precipitators before being discharged to the
atmosphere.
The slurry is pumped to hydroclones to separate the unconverted ore from the metal
oxides and soluble sodium chromate. The uncoverted ore, or recycle residue, is
filtered on horizontal belt vacuum filters, washed to remove as much of the sodium
chromate as possible, and dried in a rotary dryer. The recycled residue is transported
with a drag conveyor and bucket elevator into a storage silo where it is added to the kiln
feed mix. The light fraction of the solids and the soluble sodium chromate, or quench
light slurry, are pumped to the wet end of the plant for further purification.
Wet End Process
The quench light slurry, which has a pH of 12.5 to 13.0, is then neutralized with an acidic
stream from the chromic acid production process to a pH of about 8.5. At this pH,
aluminum hydroxide and other metal oxides and hydroxides become insoluble. These
solids are filtered and washed on a rotary drum vacuum filter. The solids are then
reslurried, filtered, and washed on a second rotary drum vacuum filter before being sent
to the wastewater treatment area of the plant for treatment and disposal.
In the wastewater treatment area, the solids are reacted with pickle liquor, or spent
hydrochloric acid, in one of four reactor vessels to reduce any remaining hexavalent
chromium back to the trivalent state. After testing to insure complete reduction, the
solution is neutralized with lime to a neutral pH. The solids are then sent through a series
of three clarifiers to remove the chlorides before discharging them to an on -site landfill.
The water is filtered through sand filters before being discharged to the Northeast Cape
Fear River.
Following the liquid stream, the filtered sodium chromate liquor is then polished in a
vertical leaf pressure filter to remove any remaining solids. A solution of soda ash is then
added to the sodium chromate liquor to precipitate the last remaining impurity, calcium,
out of solution. The calcium carbonate precipitated out by the following reaction is then
filtered out of the liquor steam utilizing another vertical leaf pressure filter.
Na2CO3 + Ca+2 4 CaCO3 + 2Na+i
The polished sodium chromate liquor is strengthened by passing it through a forced
circulation evaporator. The sodium chromate is then acidified with sulfuric acid and/or
an acid stream from the chromic acid production process to form sodium bichromate and
sodium sulfate by the following reaction:
2Na2C04 + H2SO4 + H2O 4 Na2Cr2O7.2H2O + Na2SO4
The sodium sulfate begins precipitating out in the acidification vessel and is pumped off
from the bottom as a slurry. The sodium bichromate solution is then pumped through a
series of forced circulation evaporators to strengthen the liquor and continue to
precipitate out the sodium sulfate as its solubility is lowered. The first three evaporators

are arranged in a triple effect system where the steam and vapors used to heat the liquor
flows counter -current to the strengthening liquor stream.
The sodium sulfate slurries from the acidifier and evaporator bodies are concentrated in a
cone bottomed tank and pumped to a screen basket pusher centrifuge to be washed and
separated from the liquor stream. The centrate is returned to the process while the
sodium sulfate is conveyed by screw conveyors to a dissolving tank. The resulting brine
is acidified with sulfuric acid and reacted with sulfur dioxide to convert any remaining
hexavalent chrome to trivalent chrome. Sodium hydroxide is added to raise the solution
to about 8.5 pH, at which the point the trivalent chrome is insoluble. The chrome is
removed from the solution with membrane filters and it is sent to the Dry End of the
process to be returned to the kilns. The purified brine solution is then re -crystallized in a
mechanical vapor recompression evaporator. The crystals produced are centrifuged,
dried in a fluid bed dryer, and pneumatically conveyed to two storage silos. The sodium
sulfate is loaded into bulk trucks or rail cars for shipment to customers or to a contract
bagging operation.
Alternately, the sodium sulfate slurries from the acidifier and evaporator bodies are
concentrated in a cone -bottomed tank and pumped to a screen basket pusher centrifuge to
be separated from the liquor stream. The centrate is returned to the process while the
sodium sulfate is conveyed by screw conveyors to a flash dryer. The flash dryer utilized
96 fuel oil to heat air which is used to both dry the sodium sulfate and convey it to a
storage silo. The sodium sulfate is packaged into bulk trucks or rail cars for shipment to
customers.
After strengthening the liquor to 85%, it is passed through a vertical pressure leaf filter to
remove the last of the sodium sulfate. The sodium bichromate liquor can now either be
sold as a liquid product, used as a feedstock for making bichromate crystal, or used as a
raw material for the production of chromic acid. Liquor shipments are loaded into trucks
or rail cars for transport to customers.
Sodium bichromate crystals are produced by concentrating the liquor in a vacuum
crystallizer. A slurry of sodium bichromate crystals are then pumped from the
crystallizer to a solid bowl centrifuge where they are separated from the mother liquor.
The crystals are then dried in a fluid bed cooler, transported by a bucket elevator to a
screener to remove the culls, and conveyed to a storage bin to await packaging. The
crystal is packaged in either bags or drums before shipping to customers.
Sodium bichromate fed to the chromic acid process is mixed with concentrated sulfuric
acid in a titanium reactor system. Heat exchangers use cooling water to control the
temperature of the following exothermic reaction to form chromic acid.
Na2Cr2O7.2H20 +2Na2SO4 4 2CrO3 2NaHSO4 + 3H2O
The crude chromic acid crystals formed in the reaction are filtered out of the solution
with a titanium rotary drum vacuum filter. The filtrate is returned to the bichromate
production process to be used to convert the sodium chromate to sodium bichromate.

The crude crystals, still contaminated with sodium bisulfate, as fed to continuous melters
where they are heated to about 400°F. The sodium bisulfate floats to the top of the melter
while the heavier molten chromic acid is decanted off the bottom of the melter. The
molten chromic acid is solidified on water-cooled flaker rolls before being conveyed to a
storage bin to await packaging. The sodium bisulfate layer is returned to the sodium
bichromate production process where it is utilized to neutralize the quench light slurry to
help precipitate out impurities. Chromic Acid dry flake is then packaged in drums, tote
bins, trucks, or rail cars for shipment to customers.
Wastewater Treatment
Wastewater slurry from the 92 repulp tank in the neutralization production area and
waste water from the recycle production area enters the wastewater treatment process
via the 80,000 gallon wastewater collection tank. Pickle liquor (ferrous chloride
reducing agent) and/or sulfur dioxide are added to begin the reduction of hexavalent
chromium to trivalent chromium.
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 groundwater 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 underflow (residual solids) from the third stage of each washing circuit 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 pumped via conveyance piping to 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. The
maximum permitted monthly average flow of this stream is 0.785 MGD.

Quantification Justification for Residuals Production Rate
Facility Design Flow to the River
The facility design flow to the river is 545 gallons per minute
545 gal 60 min 24 hr
x x
min hr day
Facility Average Flow to the River
2020 Monthlv 001 Effluent
Month
avg gal (MGD)
Jan
0.585
Feb
0.653
Mar
0.673
Apr
0.702
May
0.556
Jun
0.73
Jul
0.655
Aug
0.757
Sep
0.676
Oct
0.554
Nov
0.531
Dec
0.78
Average
0.654
1 0.785 MGD
x =
1,000,000
Facility Design Flow to the Quarry
The facility design flow to the quarry is 420 gallons per minute
420 gal 60 min 24 hr 1 0.605 MGD
min x hr x day x 1,000,000
Facility max Flow to the Quarry
The facility maximum flow to the quarry is 0.832 MGD based on previous renewal applications.
Tons of Process Residuals to be Disposed
1. Based on facility maximum bichromate (BE) equivalent production rate of 360 tons per day
2. Based on dry ton factor of 1.054 tons residue per ton BE
342.5 tons BE 365 day 1.054 ton residue 131,750 Ton Residue
day x yr x ton BE yr

Equivalence in Cubic Yards of Solids to be Disposed
1. Based on facility maximum bichromate (BE) equivalent production rate of 360 tons per day
2. Based on cubic yard factor of 1.45 cubic yards (cy) residue per ton of BE
342.5 tons BE 365 day 1.45 cy residue 181,250 cy Residue
day x yr x ton BE yr
Volume of Solids in Quarry Section 1(as of 1/1/2021)
Based on calculations for 2020 quarry report
3,747,306 cubic yards
Volume of Solids in Quarry Section 1(as of 1/1/2021)
Based on hydrographic survey conducted December 2020
625,000
cubic yards
Life Remaining in Quarry Section 1(as of 1/1/2021)
Based on the maximum loading rate of 191,052 cy/yr (calculated above)
625,000 cy 1 yr 3.4 years
x =
181,250 cy
Volume of Solids in Quarry Section 2 (as of 1/1/2021)
Based on calculations for 2020 quarry report
2,943,066
cubic yards
Volume of Solids in Quarry Section 2 (as of 1/1/2021)
Based on calculations for 2020 quarry report
724,476
cubic yards
Life Remaining in Quarry Section 2 (as of 1/1/2021)
Based on the maximum loading rate of 191,052 cy/yr (calculated above)
724,476 cy 1 yr 4.0 years
x =
181,250 cy

Effective Life of Impoundment
3.4 yrs Quarry Section 1
+ 4.0 yrs Quarry Section 2
7.4 yrs

Residuals Sampling Plan
Residual solids are placed in the Quarry/disposal unit by the Elementis Chromium Castle Hayne
Manufacturing Facility in accordance with the Surface Disposal of Residuals (SDR) permit. Residuals
sampling procedures and analyses are summarized below.
Residuals samples will be collected from the slurry retention tank (see the Process Flow Narrative in
Attachment C) by personnel designated by the Elementis Chromium Wastewater Treatment Plant
(WWTP) Operator in Responsible Charge (ORC). Residuals in the slurry retention tank are transferred
directly from the slurry retention tank to the disposal unit and are therefore representative of residuals
placed in the disposal unit. Samples will be analyzed for Toxicity Characteristic Leaching Procedure
(TCLP) chromium by Elementis Lab, for pH, total solids, and total arsenic, chromium, and nickel by
Environmental Chemists, Inc., and for demonstration that residuals are non -hazardous parameters by
CompuChem (a division of Liberty Analytical). Other North Carolina certified laboratories may also be
used for laboratory analysis.
Residuals sample analytical results will be maintained on file for a minimum of five years and will be
provided to the NC Department of Environmental Quality (DEQ) Division of Water Resources (DWR) in
annual reports submitted in accordance with the SDR permit.
Demonstration that Residuals are Non -Hazardous
Residuals will be sampled annually to demonstrate that they are non -hazardous under the Resource
Conservation and Recovery Act (RCRA). The annual analysis will consist of the following: ignitability,
corrosivity, reactivity, and TCLP analysis. The TCLP analysis will include the following parameters:
Arsenic
1,4-Dichlorobenzene
Nitrobenzene
Barium
1,2-Dichloroethane
Pentachlorophenol
Benzene
1,1-Dichloroethylene
Pyridine
Cadmium
2,4-Dinitrotoluene
Selenium
Carbon Tetrachloride
Endrin
Silver
Chlordane
Hexachlorbenzene
Tetrachloroethylene
Chlorobenzene
Heptachlor
Toxaphene
Chloroform
Hexachloro-1,3-butadiene
Trichloroethylene
Chromium
Hexachloroethane
2,4,5-Trichlorophenol
m-Cresol
Lead
2,4,6-Trichlorophenol
o-Cresol
Lindane
2,4,5-TP (Silvex)
p-Cresol
Mercury
Vinyl Chloride
Cresol
Methoxychlor
2,4-D
Methyl ethyl ketone
Chromium Leachability
Residuals will be sampled a minimum of one time per month to demonstrate that they are non-
hazardous under RCRA with respect to chromium leachability (i.e., TCLP chromium).
Metals Determination
Residuals will be sampled a minimum of one time per month to demonstrate that total concentrations
(reported on a dry weight basis) of arsenic and nickel are below permitted ceiling concentrations.
Residuals that exceed the ceiling concentration for chromium may be disposed in the disposal unit as
long as the chromium leachability testing (discussed above) demonstrates that the residuals are non-

hazardous under RCRA with respect to chromium leachability. The percent total solids and pH of the
samples will also be measured. Please note that the distance from the disposal unit to the closest
property line is between 25 and 50 meters. Therefore, the applicable ceiling concentrations for arsenic,
chromium, and nickel are 34 mg/kg, 220 mg/kg, and 240 mg/kg, respectively (as indicated in Section 11.8
of the permit).
Groundwater Sampling Plan
Compliance groundwater monitoring is completed in accordance with the SDR permit. The compliance
groundwater monitoring program is summarized below.
Groundwater samples will be collected from the permit -designated monitor wells listed below for
analysis of total dissolved solids, chloride, total chromium, iron, and nickel by a NC -certified laboratory.
Water levels will be measured in each well by field personnel prior to purging, and temperature,
conductivity, and pH will be measured in the field during well purging and prior to sample collection.
A compliance monitoring report for each sampling event will be submitted to DWR on or before the last
day of the month following the sampling month. The report will include compliance monitoring forms
for each well and laboratory analytical reports.
Compliance Monitor Well List
Permit ID
Facility ID
MW-1
CPW-13S
MW-2
CPW-14S
MW-3
CPW-15S
MW-8
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-9S
MW-20
CPW-10S
MW-21
CPW-5S
MW-22
CPW-2D
MW-23
CPW-3D
MW-24
CPW-4D
MW-25
CPW-5D
MW-26
CPW-6D
MW-27
CPW-7D
MW-28
CPW-12S

Attachment D
Residuals Quality Information
Laboratory Analytical Reports
IN
hart hickP' an
SMAFnR FNVIRANMENTAa 5OLUTIONS

[en7virrochem:]
ANALYTICAL & CONSULTING CHEMISTS
Environmental Chemists, Inc.
6602 Windmill Way, Wilmington, NC 28405 • 910.392.0223 Lab • 910.392.4424 Fax
710 Bowsertown Road, Manteo, NC 27954 • 252.473.5702 Lab/Fax
255-A Wilmington Highway, Jacksonville, NC 28540 • 910.347.5843 Lab/Fax
[e-mail]
Elementis Chromium
5408 Holly Shelter Road
Castle Hayne NC 28429
Attention: Sean Coury
Date of Report: Sep 29, 2020
Customer PO M
Customer ID: 08110009
Report #: 2020-13989
Project ID: Slurry to Quarry
Lab ID Sample ID:
Collect Date/Time Matrix Sampled by
20-35521 Site: Slurry to Quarry
8/19/2020
9:30 AM Solid/Sludge Dean Riggs
Test
Method
Results Date Analyzed
Chlordane (TCLP)
SW 846 Method 8081B/3510
<0.02 mg/L
08/25/2020
Endrin (TCLP)
SW 846 Method 8081B/3510
<0.0005 mg/L
08/25/2020
Heptachlor (TCLP)
SW 846 Method 8081B/3510
<0.0005 mg/L
08/25/2020
Heptachlor epoxide (TCLP)
SW 846 Method 8081B/3510
<0.0005 mg/L
08/25/2020
Lindane (TCLP)
SW 846 Method 8081B/3510
<0.0005 mg/L
08/25/2020
Methoxychlor (TCLP)
SW 846 Method 8081B/3510
<0.0005 mg/L
08/25/2020
Toxaphene (TCLP)
SW 846 Method 8081B/3510
<0.05 mg/L
08/25/2020
1,4-Dichlorobenzene (TCLP)
SW 846 method 8270/3510
<0.050 mg/L
08/26/2020
2,4,5-Trichlorophenol (TCLP)
SW 846 method 8270/3510
<0.050 mg/L
08/26/2020
2,4,6-Trichlorophenol (TCLP)
SW 846 method 8270/3510
<0.050 mg/L
08/26/2020
2,4-Dinitrotoluene (TCLP)
SW 846 method 8270/3510
<0.050 mg/L
08/26/2020
Cresol (TCLP)
SW 846 method 8270/3510
<0.050 mg/L
08/26/2020
Hexachloro-1,3-butadiene (TCLP)
SW 846 method 8270/3510
<0.050 mg/L
08/26/2020
Hexachlorobenzene (TCLP)
SW 846 method 8270/3510
<0.050 mg/L
08/26/2020
Hexachloroethane (TCLP)
SW 846 method 8270/3510
<0.050 mg/L
08/26/2020
m + p-Cresol (TCLP)
SW 846 method 8270/3510
<0.050 mg/L
08/26/2020
Nitrobenzene (TCLP)
SW 846 method 8270/3510
<0.050 mg/L
08/26/2020
o-Cresol (TCLP)
SW 846 method 8270/3510
<0.050 mg/L
08/26/2020
Pentachlorophenol (TCLP)
SW 846 method 8270/3510
<0.250 mg/L
08/26/2020
Pyridine (TCLP)
SW 846 method 8270/3510
<0.050 mg/L
08/26/2020
2,4,5-TP (TCLP)
SW846 Method 8151A
<0.003 mg/L
08/25/2020
2,4-D (TCLP)
SW846 Method 8151A
<0.003 mg/L
08/25/2020
1, 1 -Dichloroethylene (TCLP)
SW846 Method 8260/5030
<0.01 mg/L
08/27/2020
1,2-Dichloroethane (TCLP)
SW846 Method 8260/5030
<0.01 mg/L
08/27/2020
Benzene (TCLP)
SW846 Method 8260/5030
<0.01 mg/L
08/27/2020
Carbon Tetrachloride (TCLP)
SW846 Method 8260/5030
<0.01 mg/L
08/27/2020
Report #:: 2020-13989 Page 1 of 3

envirochem
SM
ANALYTICAL & CONSULTING CHEMISTS
Environmental Chemists, Inc.
6602 Windmill Way, Wilmington, NC 28405 ■ 910.392.0223 Lab - 910.392.4424 Fax
710 Bowsertown Road, Manteo, NC 27954 - 252.473.5702 Lab/Fax
255-A Wilmington Highway, Jacksonville, NC 28540 - 910.347.5843 Lab/Fax
[e-mail]
Elementis Chromium
Date of Report: Sep 29, 2020
5408 Holly Shelter Road
Customer PO #:
Castle Hayne NC
28429
Customer ID: 08110009
Attention: Sean Coury
Report #: 2020-13989
Project ID: Slurry to Quarry
Chlorobenzene (TCLP)
SW846 Method 8260/5030
<0.01 mg/L
08/27/2020
Chloroform (TCLP)
SW846 Method 8260/5030
<0.01 mg/L
08/27/2020
Methyl ethyl ketone (TCLP)
SW846 Method 8260/5030
<0.05 mg/L
08/27/2020
Tetrachloroethylene (TCLP)
SW846 Method 8260/5030
<0.01 mg/L
08/27/2020
Trichloroethylene (TCLP)
SW846 Method 8260/5030
<0.01 mg/L
08/27/2020
Vinyl Chloride (TCLP)
SW846 Method 8260/5030
<0.01 mg/L
08/27/2020
RCI
Cyanide
EPA 335.4
<0.05 mg/kg
08/27/2020
Reporting limit elevated due to matrix interference.
Sulfide
SM 4500 S o
<0.5 mg/kg
08/26/2020
Reporting limit elevated due to matrix interference.
Ignitability
SW 846 method 1010
>190 °F
09/02/2020
Sludge Residuals
Aluminum
EPA 200.7
254000mg/kg
08/25/2020
Arsenic
EPA 200.7
<48.4 mg/kg
08/27/2020
Cadmium
EPA 200.7
<48.4 mg/kg
08/27/2020
Calcium
EPA 200.7
289000 mg/kg
08/27/2020
Chromium
EPA 200.7
37900 mg/kg
08/27/2020
Copper
EPA 200.7
138 mg/kg
08/27/2020
Lead
EPA 200.7
<48.4 mg/kg
08/27/2020
Magnesium
EPA 200.7
41200mg/kg
08/27/2020
Molybdenum
EPA 200.7
<48.4 mg/kg
08/27/2020
Nickel
EPA 200.7
480 mg/kg
08/27/2020
Potassium
EPA 200.7
<2421 mg/kg
08/27/2020
Selenium
EPA 200.7
<48.4 mg/kg
08/27/2020
Sodium
EPA 200.7
12700 mg/kg
08/27/2020
Zinc
EPA 200.7
5300 mg/kg
08/27/2020
Nitrate+Nitrite-Nitrogen
EPA3532
7.07mg/kg
08/25/2020
Total Solids (%)
SM 2540 B
5.74 %
08/20/2020
pH
SM 4500 H B
9.20 units
08/27/2020
Report # 2020 13989 Page 2 of 3

enviroehem)
ANALYTICAL & CONSULTING CHEMISTS
Environmental Chemists, Inc.
6602 Windmill Way, Wilmington, NC 28405 • 910.392.0223 Lab • 910.392.4424 Fax
710 Bowsertown Road, Manteo, NC 27954 • 252.473.5702 Lab/Fax
255-A Wilmington Highway, Jacksonville, NC 28540 • 910.347.5843 Lab/Fax
[e-mail]
Elementis Chromium
Date of Report: Sep 29, 2020
5408 Holly Shelter Road
Customer PO #:
Castle Hayne NC 28429
Customer ID: 08110009
Attention: Sean Coury
Report #: 2020-13989
Project ID: Slurry to Quarry
Ammonia Nitrogen SM 4500 NH3 C
<1.74 mg/kg
08/20/2020
Total Kjeldahl Nitrogen (TKN) SM 4500 Org B
880 mg/kg
08/20/2020
Total Phosphorus SM 4500 P F
27.4 mg/kg
08/27/2020
Mercury Sw8467471B
<0.291 mg/kg
08/24/2020
TCLP Metals
Arsenic
EPA 200.7
<1.0 mg/L
08/26/2020
Barium
EPA 200.7
<1.0 mg/L
08/26/2020
Cadmium
EPA 200.7
<1.0 mg/L
08/26/2020
Chromium
EPA 200.7
<1.0 mg/L
08/26/2020
Lead
EPA 200.7
<1.0 mg/L
08/26/2020
Selenium
EPA 200.7
<1.0 mg/L
08/26/2020
Silver
EPA 200.7
<1.0 mg/L
08/26/2020
Mercury
EPA 245.1
<0.0002 mg/L
08/28/2020
Comment: Sludge residuals, except pH, reported on a dry weight basis. pH reported on an as received basis.
Reviewed by:
Report #:: 2020-13989 Page 3 of 3

- ENVIRONMENTAL CHEMISTS, INC 6602 Windmill Way Wilmington, NC 28405
OFFICE: 910-392-0223 FAX [phone]
Analytical & Consulting Chemists NCDENR: DWQ CERTERICATION # 94 NCDHHS: DLS CERTIFICATION # 37729
CLIENT: ELEMENTIS CHROMIUM
COLLECTION AND CHAIN OF CUSTODY
PROJECT NAME: REPORT NO:
ADDRESS: CONTACT NAME:
PO NO:
REPORT TO: WALT GREER PHONE/FAX:
COPY TO:
E-MAIL:
Sampled Bv: , SAMPLE TYPE: I = Influent, E = Effluent, W = Well, ST = Stream, SO = Soil, SL = Sludge, Other:
-
Sample Identification
Collection
ECL
N
E o e
O
1 o
V a
o m
U E
LLI
m
J 2
PRESERVATION
ANALYSIS REQUESTED
Date
Time
Temp
z
z
=
o
_
0
i
0
i
o
~
W
~O
Annual Slurry to Quarry
residual 2Qts
'6 IND
cffi
a
G
SL
G
P
X
Corrosivity, Ignitability, Reactivity and Full
TCLP Analyses
See Attached Sheet
C
P
G
G
C
P
G
G
C
P
G
G
C
P
G
G
C
P
G
G
NOTICE - DECHLORINATION: Samples for Ammonia, TKN, Cyanide, Phenol and Bacteria must be dechlorinated (0.2 ppm or less) in the field at the time of collection. See reverse for instructions
Transfer
Relinquished By:
Date/Time
Received By:
Date/Time
1.
2.
Temperature when ceive Accepted: ec ed: Resample Req este :_
Delivered By: Received By:Date:
Comments: TUR A OUND:
Time: 12.' 24

envirochem
SM
ANALYTICAL & CONSULTING CHEMISTS
Elementis Chromium
5408 Holly Shelter Road
Castle Hayne NC 28429
Attention: Dean Riggs
Environmental Chemists, Inc.
6602 Windmill Way, Wilmington, NC 28405 ■ 910.392.0223 Lab • 910.392.4424 Fax
710 Bowsertown Road, Manteo, NC 27954 • 252.473.5702 Lab/Fax
255-A Wilmington Highway, Jacksonville, NC 28540 • 910.347.5843 Lab/Fax
[e-mail]
Date of Report: Jan 20, 2021
Customer PO #:
Customer ID: 08110009
Report #: 2021-00225
Project ID: NPDES NC 0003875 Weekly
Lab ID
Sample ID:
Collect Date/Time
Matrix Sampled by
21-00521
Site: 001 - Effluent, Composite
1/6/2021 7:30 AM
Water Dean Riggs
Test
Method
Results Date Analyzed
BOD
SM 5210 B
2 mg/L 01/06/2021
Lab ID
Sample ID:
Collect Date/Time
Matrix Sampled by
21-00522
Site: 002 - Effluent, Grab
1/6/2021 9:50 AM
Water Dean Riggs
Test
Method
Results Date Analyzed
Ammonia Nitrogen
BOD
Lab ID Sample ID:
21-00523 Site: 001 - Effluent S61
Test
EPA 350.1
SM 5210 B
< 0.2 mg/L 01/12/2021
<2 mg/L 01/06/2021
Collect Date/Time Matrix Sampled by
1/6/2021 10:30 AM Water Dean Riggs
Method Results Date Analyzed
Fecal Coliform Idexx Colilert-18 2 MPN/100ml 01/06/2021
Lab ID Sample ID: Slurry to Quarry Collect Date/Time Matrix Sampled by T
21-00524 Site: Liquid 1/6/2021 9:30 AM Water Dean Riggs
Test Method Results Date Analyzed
Arsenic
Chromium
Nickel
EPA 200.7
EPA200.7
EPA200.7
<0.010 mg/L
<0.010mg/L
<0.010mg/L
01/12/2021
01/12/2021
01/12/2021
Lab ID
Sample ID: Slurry to Quarry Collect Date/Time
Matrix Sampled by
21-00524A
Site: Cake 1/6/2021 9:30 AM
Solid/Sludge Dean Riggs
Test
Method
Results Date Analyzed
Arsenic
EPA200.7
<4.21 mg/kg
01/12/2021
Chromium
EPA200.7
13100mg/kg
01/12/2021
Nickel
EPA200.7
126mg/kg
01/12/2021
Total Solids (%) SM 2540 B
66.8 %
01 /11 /2021
Report #:: 2021-00225 Page 1 of 2

ANALYTICAL & CONSULTING CHEMISTS
row"'- -71
Environmental Chemists, Inc.
6602 Windmill Way, Wilmington, NC 28405 ■ 910.392.0223 Lab a 910.392.4424 Fax
710 Bowsertown Road, Manteo, NC 27954 • 252.473.5702 Lab/Fax
255-A Wilmington Highway, Jacksonville, NC 28540 ■ 910.347.5843 Lab/Fax
[e-mail]
Elementis Chromium Date of Report: Jan 20, 2021
5408 Holly Shelter Road Customer PO #:
Castle Hayne NC 28429 Customer ID: 08110009
Attention: Dean Riggs Report #: 2021-00225
Project ID: NPDES NC 0003875 Weekly
Lab ID Sample ID: Slurry to Quarry Collect Date/Time Matrix Sampled by
21-00524AA Site: Entire Sample 1/6/2021 9:30 AM Solid/Sludge Dean Riggs
Test Method Results Date Analyzed
Total Solids (%) SM 2540 s 28.2 % 01/12/2021
pH SW 846 Method 9045D 8.47 units 01/19/2021
Comment: Cake results reported on a dry weight basis.
Reviewed by: &Lod 0-h0l
Report #:: 2021-00225 Page 2 of 2

Environmental Chemist, Inc., Wilmington, NC Lab #94
6602 Windmill Way
Wilmington, NC 28405
910-392.0223
Sample Receipt Checklist
_
Client: EU WE�KM5 Date: 04 Report Number:02
Receipt of sample: ECHEM Pickup ❑ Client Delivery
JUPS ❑ FedEx ❑ Other ❑
❑ YES
❑ NO
N/A
1. Were custody seals present on the cooler?
❑ YES
10 NO
N/A 12.
If custody seals were present, were they intact/unbroken?
Original temperature upon receipt - o'� -BL_°C Corrected temperature upon receipt °C
How temperature taken: ❑ Temperature Blank V Against Bottles
IR Gun ID: Thomas Traceable S/N 192511657 IR Gun Correction Factor °C: 0.0
❑ YES
I0 NO
3. If temperature of cooler exceeded 6°C, was Project Mgr./QA notified?
YES
10 NO
4. Were proper custody procedures (relinquished/received) followed?
YES ID
NO
1 5. Were sample ID's listed on the COC?
YES ID
NO
6. Were samples ID's listed on sample containers?
YES
❑ NO
7. Were collection date and time listed on the COC?
YES
❑ NO
8. Were tests to be performed listed on the COC?
YES
❑ NO
9. Did samples arrive in proper containers for each test?
YES
❑ NO 110.
Did samples arrive in good condition for each test?
YES
❑ NO 111.
Was adequate sample volume availableT
YES
❑ NO 112.
Were samples received within proper holding time for requested tests?
YES
❑ NO 113.
Were acid preserved samples received at a pH of <2?
YES 10
NO
14. Were cyanide samples received at a pH >12?
❑ YES
❑ NO 115.
Were sulfide samples received at a pH >9?
YES 10
NO
16. Were NH3/TKN/Phenol received at a chlorine residual of <0.5 m/L? **
❑ YES ID
NO
17. Were Sulfide/Cyanide received at a chlorine residual of <0.5 m/L?
❑ YES 10
NO
18. Were orthophosphate samples filtered in the field within 15 minutes?
* TOC/Volatiles are pH checked at time of analysis and recorded on the benchsheet.
** Bacteria samples are checked for Chlorine at time of analysis and recorded on the benchsheet.
Sample Preservation: (Must be completed for any sample(s) incorrectly preserved or with headspace)
Sample(s) were received incorrectly preserved and were adjusted accordingly
by adding (circle one): H2SO4 HNO3 HCI NaOH
Time of preservation: If more than one preservative is needed, notate in comments below
Note: Notify customer service immediately for incorrectly preserved samples. Obtain a new sample or
notify the state lab if directed to analyzed by the customer. Who was notified, date and time:
Volatiles Sample(s) were received with headspace
COMMENTS:
DOC. QA.002 Rev 1

Analytical & Consulting Chemists
CLIENT: ELEMENTIS CHROMIUM
ADDRESS:
Samnlad Bv-
ENVIRONMENTAL CHEMISTS, INC 6602 Windmill Way Wilmington, NC 28405
NCDENR: DWQ CERTERICATION # 94 NCDHHS: DLS CERTIFICATION # 37729 OFFICE: 910-392-0223 FAX [phone]
COLLECTION AND CHAIN OF CUSTODY
PROJECT NAME: NPDES NC 0003875 WEEKLY _REPORT NO: Z OO ZZ,
CONTACT NAME: PO NO:
REPORT TO: WALT GREER PHONE/FAX:
COPY TO: E-MAIL:
4ZA11a O1 C TVVIC. 1 — I..cl..— - _ ­._­
Sample Identification
Collection
d a
In
^ a
E `o
s0
`o
a
S=
`o rn
t E
"
..--.. _, —
w
m
a
J Z
�....�... ...
PRESERVATION
.. ....... .... - .... a. c....,
vv — .rv, -1 - Jluuww' V111C1.
ANALYSIS REQUESTED
Date
Time
Temp
i
Z
'o
_"
o
_
xo
`_
p
w
o
001 Comp Effluent 1 QT.
5ldc
C
5 z!
X
BOD, 5 Day ( 1/WK)
C
P
002 Effluent 1 QT.
V a
�
16 �
5ZZ'
X
BOD, 5 Day (1/WK)
G
P
002 Effluent 1 QT.
001 Effluent SB1
5
0
I� C
,+�
�V l i C
s.
`'
5 7-3
All
Z 1
X
Ammonia Nitrogen, (2/Mnth)
Fecal Coliform # 1 (1/wk)
-j
13
IS
P
G
P
003 Comp Effluent 1QT.
Slurry/Quarry Residual
j5 C
I
S Z 7
X
X
BOD, 5 Day ( 1/WK)
Total Arsenic,Total Ni,Total Cr.
C
P
G
P
4
2 C4,
% Solids,PH per 3050 D for Metals
G
P
G
P
G
P
G
P
NOTICE - DECHLORINATION: Samples for Ammonia, TKN, Cyanide, Phenol and Bacteria must be dechlorinated (0.2 ppm or less) in the field at the time of collection. See reverse for instructions
Transfer
Relinquished By:
Date/Time
Received By:
Date/Time
1.
2.
�r���Y1` YY11�11 �1��.,• �. /1GGCIJICU. y� rcetec a: Kesample Kequested:
Delivered By: obi. Received By: Dater Time: I.Comments: TUR AROUND: