NCS000003_APPLICATION_20141103

PERMIT NO.
DOC TYPE
DOC DATE
STORMWATER DIVISION CODING SHEET
NCS PERMITS
❑ FINAL PERMIT
❑ MONITORING REPORTS
APPLICATION
❑ COMPLIANCE
❑ OTHER
❑ Z0 � 11 b �
YYYYMMDD

CHROMIUM Ap
CERTIFIED MAIL 91 7199 9991 7033 0489 7634
RETURN RECEIPT REQUESTED
October 31, 2014
STORMWATER INDIVIDUAL PERMIT COVERACE RENENSAL
Stormwater Permitting Unit
1612 Mail Service Center
Raleigh, NC 27699-1612
RE: NPDES STOR\I\\',\TER PERMIT RENENY,V-
NCS000003— ELEVIENrIS CHROMIUM, INC CASTLE HAYNE PLANT
Dear Mr. Weaver:
Enclosed please find the original and two copies of the completed NPDES Permit Application for renewal of this
facility's NPDES permit, Permit Number NCS000003. Our current permit expires at midnight on April 30, 2015.
Elementis Chromium, Inc (Elementis) hereby respectively requests renewal of NPDES Permit Number NCS000003
for the above referenced facility.
Please note that there have been no changes at the facility since issuance of the last permit. Thank you for your
efforts with this renewal. If you have any questions or concerns, please do not hesitate to contact me at (910) 675-
7229.
Sincerely,
Paul Fox
Director of Operations
Enclosures
RECEIVED
NOV 0 3 2614
DENR-LAND QUALITY
STORMWATER PERiOTTTNC
Elemenlis Chromium
5408 Holly Shelter Road
Castle Hayne, NC 28429
Telephone: [phone]
Facsimile:[phone]

Renewal Application for
National Pollutant Discharge Elimination System
Stormwater Individual Permit
Elementis Chromium
Castle Hayne, New Hanover County, North Carolina
October 2014
Prepared for:
CHROMIUM
Elementis Chromium Inc.
5408 Holly Shelter Road
Castle Hayne, North Carolina 28429
Prepared by:
® a
SCIENCE d 6NO INEf i I HG. PI1C
Coury Science & Engineering, PLLC
471 Royal Tern Drive
Hampstead, North Carolina 28443

Section 1: Introduction...... ..... . . ........ . ........ .. ...... ......... - .........
......... .............. 3
Permit Request and Permit Fees .......... ......._ .. ......... ........... ........,
........._ ....,,,........ 3
FacilityInformation..................................:.............„.................................................................................................
3
DocumentOrganization............................................................................................................................................
3
Section2: Site Information..........................................................................................................................................
4
SiteLocation.............................................................................................................................................................
4
Descriptionof Industrial Activity ... ......... .......... ..........................................................................
.............................. 4
Description of Stormwater Outfall ....... ...................................., ....... .........
........... ............... 5
sitemap .............. ............................ ........, .........
6
Section3: Monitoring Summary.......................................:::......:.............:::...................................................................6
QualitativeMonitoring.............................................................................................................................................
6
QuantitativeMonitoring.....................................................................................................
........................ 6
Section 4: Best Management Practices.........................................................................................................................
9
Good Housekeeping .... ....... .......:. ............... ............ ......... ;........
.......9
PreventativeMaintenance..........................................................................................................................................
9
Removal, Cover, or Control of Industrial Activities...................................................................................................
9
VisualInspections.....................................................................................................................................................
9
SpillPrevention and Response....................................................................................................................................
9
Sedimentand Erosion Control....................................................._...........................................................................
9
Managementof Runoff .......... ..... ....... ........... ............... ...........................................................................................
10
EmployeeTraining........... .......... ...................................... ......................
............10
Recordkeeping........................................................................................................................................................
10
Section5: Application Form.......................................................................................................................................
11
Section 6: SWPPP Certification..................................................................................................................................
12
Appendix1 General Location Map................................................................................,,,_.................................
13
Appendix2 Site Map.............................................................................................................................................
14
Page 2 of 14

Elementis Chromium, Inc (Elementis) operates a sodium dichromate, chromic acid, and sodium sulfate
manufacturing facility in Castle Hayne, New Hanover County, North Carolina. Elementis falls under the standard
industrial classification (SIC) code of 2819 for Industrial Inorganic Chemical (not elsewhere classified)
manufacturing. Elementis Chromium currently operates under Individual NPDES Stormwater Permit No.
NCS0000003 which was issued on May 1, 2010,
In accordance with Part II Section A of permit NCS0000003, the site has developed and implemented a Stormwater
Management Plan and Stormwater Pollution Prevention Plan (SWPPP) which incorporates all applicable elements.
PERMIT REQUEST AND PERMIT FEES
The purpose of this application is for Individual NPDES Stormwater Permit Renewal. The current NPDES
Stormwater Permit expires on April 30, 2015. There are no fees associated with the individual NPDES stormwater
permit renewal.
FACILITY INFORMATION
The physical and mailing address for Elementis is as follows:
5408 Holly Shelter Road
Castle Hayne, North Carolina 28429
To facilitate review of this application, please contact the following individual identified below.
Preparer's Contact:
Sean Coury, PE INC)
Partner
Coury Science & Engineering, PLLC
[phone]
[e-mail]
DOCUMENT ORGANIZATION
This permit application is divided into seven sections and four appendices. Tables are included throughout the
document and are referenced in the table of contents. The seven sections and four appendices are as follows:
Section 1 Introduction
Section 2 Site Information
Section 3
Monitoring Summary
Section 4
Best Management Practices
Section 5
Application Form
Section 6
SWPPP Certification
Appendix 1 General Location Map
Appendix 2 Site Map
Refer to the table of contents for a detailed listing of tables and figures.
Page 3 of 14

This section provides information on the site location and location of industrial activities.
SITE LOCATION
Elementis Chromium is located in Castle Hayne, New Hanover County, North Carolina. The approximate
coordinates are LAT 34.3505 and Long-77.85918, The facility is situated along the Cape Fear River, which is a class
B, Sw stream in the Cape Fear River Basin. A general location map can be found in Appendix 1. The stormwater
outfall covered by the Individual NPDES Stormwater Permit No. NCS0000003 discharges to the Northeast Cape
Fear River. The Northeast Cape Fear River is on the 303(d) (Impaired Waters) list for mercury.
DESCRIPTION OF INDUSTRIAL ACTIVITY
Elementis — Castle Hayne is a manufacturer of sodium dichromate, chromic acid, and sodium sulfate which is
produced from chromite ore, soda ash, lime and sulfuric acid. Chromite ore is first sent through a dryer and then
pulverized to a powder in one (1) of four (4) on -site ball mills. The pulverized ore is combined with lime, sodium
carbonate (soda ash), and recycle residue prior to being fed to one (1) of three (3) on -site kilns. The ore mixture is
heated to approximately 2000 degrees Fahrenheit in the kiln. This treatment oxidizes the chromite ore, converting
the majority of the chromium in the ore from trivalent to hexavalent chromium. The roasted mixture of pulverized
ore, lime, recycled residue, and soda ash is quenched and leached with water in tanks, producing a sodium
chromate solution and solid ore residues.
After leaching, the mixture is sent through hydroclones to separate the sodium chromate solution from
unconverted ore residue. The unconverted ore (recycle residue and post leach ore residue) is sent to the recycle
residue process to be returned to the process to make up 50% of the initial kiln feed mixture.
After the hydroclones, the leached sodium chromate mixture is neutralized with sulfuric acid or chrome
contaminated acid generated from the chromic acid process from a 12 to 13 pH to a pH of 8.5. After
neutralization, the mixture is sent through a primary and secondary rotary reject filter to separate the sodium
chromate solution from the waste solid residue (reject residue or spent post neutralization ore residue). This
reject residue is sent directly to the N3 Repulp Tank which operates as a holding tank prior to being sent to the
wastewater treatment system
The sodium chromate is then sent through a calcium precipitator, a filter, and an acidifier where sulfuric acid and
soda ash are added to reduce the pH to 5 and precipitate the remaining ore residues to convert the sodium
chromate solution to sodium dichromate. The sodium dichromate is evaporated after leaving the acidifier and
sent through a final filtering process.
The liquid sodium dichromate is either crystallized to form a sodium dichromate solid crystal product or remains as
liquid sodium dichromate and is piped to the chromic acid process to make chromic acid.
Chromic Acid
The sodium dichromate liquid, with an 85% concentration, is reacted with sulfuric acid to produce chromic acid.
After reacting, the chromic acid solution is filtered, melted, and rolled to produce the chromic acid in solid flake
form. The air pollution control system in the chromic acid process is associated with the filtering, melting,
conveyancing, and packaging processes. The melting and filtering processing is connected to the Main Scrubber
Page 4 of 14

and the conveyancing and packaging process is connected to the Packaging Scrubber. Both the Main Scrubber and
the Packaging Scrubber is connected to the Brownian Demister before being vented to the atmosphere. The
wastewater that exits the Packaging Scrubber is reused in the Neutralization square tank in the production of
sodium dichromate. The wastewater from the Main Scrubber is sent to the N3 Repulp tank prior to being sent to
the wastewater treatment system. There is a wastewater that is generated in the Brownian Demister Unit that is
sent to the #3 Repulp tank prior to being sent to the wastewater treatment system.
Sodium Sulfate
After the acidifier in the production of sodium dichromate, the product stream is evaporated and centrifuged to
separate sodium sulfate (saltcake) from the sodium dichromate solution. The sodium sulfate saltcake is sent to a
salt cake purification unit for purification and then sold as purified sodium sulfate anhydrous. The wastewater
residue from the saltcake purification unit is reinserted to the manufacturing process at the leach and filter unit.
There have been no changes to the industrial activities at the permitted facility, including no changes to work
processes, material handling procedures, material storage practices, or raw materials used at the facility, since the
last NPDES stormwater permit was issued.
DESCRIPTION OF STORMWATER OUTFALL
The site is broken into three drainage areas (Process Area, Area 1, and Area 2). A detailed description of the three
areas is detailed in the section below.
Process Areas
All storm water falling in the process areas of the plant is either processed within the area or collected and sent to
the wastewater treatment area to be treated before discharging. The facility has an underground conveyance
system that conveys water to a stormwater holding tank prior to being sent to the onsite industrial wastewater
treatment facility. The aforementioned stormwater is covered under NPDES Wastewater Permit NC0003875;
therefore, is exempt from stormwater permitting requirements.
5D001
Elementis currently has one permitted outfall (SDO01) which discharges to the Northeast Cape Fear River. The
outfall location is just north of the North Ore Pad. The SD001Outfall drains the North Ore Pad and discharges
directly into the Northeast Cape Fear River.
Area 1
Area 1 drains the areas west and north of the Process Area and discharges directly into the Northeast Cape Fear
River. It includes approximately two-thirds of the capped lagoon north of the facility, the Salt Cake Purification
Facility northwest of the site, and the railroad tracks and surrounding grassland along the West Side of the plant.
Theprocess activities currently taking place in this drainage basin is the unloading of dry crushed limestone and
lime just west of the wastewater treatment area of the plant, and the purification of salt cake. Pipelines carrying
treated solid wastes from the wastewater treatment area to the quarries run through the area both above and
below ground. Locations where these lines run above ground are diked and channeled to the quarries. All of the
runoff associated with area 1 is sheet flow, so there is not a point source discharge associated with the runoff from
area 1.
Page 5 of 14

Area 2
Area 2 drains the areas south and east of the Process Area and discharges into a creek leading to the Northeast
Cape Fear River. Its drainage basin includes part of the office buildings, the paved employee parking lots, the are
storage piles east of the site, several maintenance storage buildings, the covered and fully contained hazardous
waste storage building, the railroad tracks northeast of the site, open loose stone and grassy areas, and heavily
wooded areas. The only process activity taking place within these areas is a shot blasting and spray painting
operation. All of the runoff associated with area 2 is sheet flow, so there is not a point source discharge associated
with the runoff from area 2.
SITE MAP
The site map which includes the locations of industrial activities (including storage of materials, disposal areas,
process areas and loading and unloading areas), drainage structures, drainage areas for each outfall, and building
locations and impervious surfaces) in located in Appendix 2.
This section provides a summary of the qualitative and quantitative stormwater sampling conducted for Outfall
SD001 during the period of the current permit, May 1, 2010 to present.
QUALITATIVE MONITORING
Qualitative, visual monitoring of the outfall effluent is conducted at least semiannually for Outfall SD001. These
monitoring events are conducted during a qualifying rain event. During qualitative monitoring, the effluent is
observed for color, odor, clarity, oil sheen, solids, and foam. The results of the qualitative monitoring conducted
since May 1, 2010 is summarized in Table 3-1.
QUANTITATIVE MONITORING i
Quantitative monitoring of the outfall effluent is conducted at least semiannual for Outfall SDOO1 according to the
monitoring schedule found in Table 2 of the permit. The results of the quantitative monitoring conducted since
May 1, 2010 is summarized in Table 3-2,
Page 6 of 14

TABLE 3-1: QUALITATIVE MONITORING RESULTS
Outfall Date/Time Color Odor Clarity Floating Suspended Foam Sheen Erosion Corrective
'#i
"None
11/30/2010-
"one,�066r
.
-one
NI6
-No"n­6
None
N/A
4/5/11
Clear None
Good
None
None
None
None
None
N/A
p­,-wsap�gp —
— '
�N
"N he'
'None
N/A
AC ear,n,,j-N-on'e
�' Iear
None­
e
0
5/14/12
Clear None
Good
None
None
None
None
None
N/A
SID001
­H 012:
2/7/13
Clear
None
Clear
None
None
None
None
None
N/A
.,Cleae"
I
Nbne_
9 -
_
Z
:-_Clear,
'.-allone
None
None;
-,,.,None
None
N/A
6/13/14
Clear
None
Clear
None
None
None
None
None
N/A
Page 7 of 14

TABLE 3-2: QUANTITATIVE MONITORING RESULTS
Page 8 of 14

As specified in Part II of Permit NCS000003, Elementis is required to develop and implement best management
practices to reduce the potential for pollutants entering the storm water runoff from the facility. While a detailed
description of each of these best management practices is maintained in the site's Stormwater Pollution Prevention
Plan, a brief summary of each practice has been included below.
GOOD HOUSEKEEPING'
Elementis employs the use of Good Housekeeping practices to maintain areas, which may contribute pollutants to
storm water, discharges in a clean and orderly manner. Good housekeeping practices are stressed in all employee
training programs.
PREVENTATIVE MAINTENANCE
Elementis has a preventive maintenance program in place for its plant operations which involves the regular
inspection and testing of plant equipment and operational systems to uncover conditions which could result in
discharges of chemicals to the plant storm water conveyance system and to the surrounding surface waters.
REMOVAL, COVER, OR CONTROL OF INDUSTRIAL ACTIVITIES
Elementis strives to eliminate, whenever possible, the inclusion of process area rainfall and runoff from entering
storm water discharges. Storm water that falls in process areas of the plant is either collected and used in the
process or drained to an internal storm water system for treatment before being discharged through permitted
industrial discharges.
VISUAL INSPECTIONS
Regular visual inspections are performed to insure that all the elements of the SWPPP are in place and working
properly. Such inspections are meant to be a routine look -over of the facility to identify conditions, which may
give rise to contamination of storm water run-off with pollutants from the plant. Items covered by the visual
inspections include areas around all process and maintenance equipment; areas where spills and leaks have
occurred in the past; material storage areas; material handling areas; outdoor material processing areas; and
waste generation, storage, treatment and disposal areas. Formal inspections of the stormwater conveyances are
also conducted at least twice annually.
,SPILL PREVENTION AND RESPONSE
Elementis has developed the SPCC plan for the plant, which addresses the subject of spill prevention and response.
The purpose of the plan is to prevent and control discharges of oil from spill events that have the potential to
reach navigable waterways of both the State of North Carolina and the United States. It details the duties and
responsibilities of both trained and non -trained responders. The plan is reviewed at least once every three years
and will be amended as necessary to include more effective spill prevention and control technology.
SEDIMENT AND EROSION CONTROL
Page 9 of 14

Plant areas that may be subject to routine vehicular traffic are covered with stone to minimize erosion potential,
while areas that are not exposed are grassed. Areas outside the main production areas that have not been
developed remain naturally wooded. Areas under construction contain silt fences as needed to control
sedimentation runoff.
MANAGEMENT OF RUNOFF
All storm water falling in the process areas of the plant is either processed within the area or collected and sent to
the wastewater treatment area to be treated before discharging.
EMPLOYEE TRAINING
Facility personnel responsible for managing hazardous wastes, materials, and oil, are required to attend corporate
hazardous waste management training courses. In addition, each site employee undergoes annual stormwater
pollution prevention training annually. Employee training records are maintained on site.
RECORDKEEPING
Records are maintained on site for all formal inspections, preventative maintenance work, employee training, and
visual storm water inspections. In addition, copies of all agency correspondence and Incident/Release reports are
kept on file.
Page 10 of 14

Permit Coverage NPDES Permit Number
NCDENR Renewal Application Form NCS000003
National Pollutant Discharge Elimination System
Stormwater Individual Permit
Please provide your permit number in box in the upper right hand corner, complete the information in the space provided
below and return the completed renewal form along with the required supplemental information to the address indicated.
Owner Information
* Address to which permit correspondence will be mailed
Owner / Organization Name:
Elementis Chromium Inc.
Owner Contact:
Paul Fox, Direction of Operations
Mailing Address:
5408 Holly Shelter Rd
Castle Hayne, NC 28429
Phone Number:
[phone]
Fax Number:
[phone]
E-mail address:
[e-mail]
Facility Information
Facility Name:
Elementis Chromium Inc
Facility Physical Address:
5408 Holly Shelter Rd
Castle Hayne, NC 28429
Facility Contact:
Calvin Overcash, Regulatory Manager
Mailing Address:
5408 Holly Shelter Rd
Castle Hayne, NC 28429
Phone Number:
[phone]
Fax Number:
[phone]
E-mail address:
[e-mail]
Permit Information
Permit Contact:
Calvin Overcash
Mailing Address:
5408 Holly Shelter Rd
Castle Hayne, NC
Phone Number:
910-675-7229
Fax Number:
910-675-7201
E-mail address:
[e-mail]
Discharoe Information
Receiving Stream:
Stream Class:
Basin:
Sub -Basin:
Number of Outfalls
Northeast Cape Fear River
1
Facility/Activity Changes Please describe below any changes to your facility or activities since issuance of your permit. Attached a
separate sheet if necessary.
No chances since last
CERTIFICATION
I certify that I am familiar with the information contained in the application and that to the best of my knowledge and belief
such information is true, complete and accurate.
Signature I Date
1-ii'cJl.. Po�c l7ip,s.—r✓ !.� OP�a1yS
Print or type name of person signing above Title
SW Individual Permit Coverage Renewal
Please return this completed application form Stormwater Permitting Program
and requested supplemental information to: 1612 Mail Service Center
Raleigh, North Carolina 27699-1612

STORM'WATER POLL UTION PREVENTION PLAN
DEVELOPMENT -AND IMPLEMENTATION
CERTIFICATION..
North Carolina Division of Energy, Mineral, and Land Resources - Stormwater Permitting
Facility Name:
Permit Number:
Location Address:
County:
"I certify, under penalty of law, that the Stormwater Pollution Prevention Plan (SPPP) document and all
attachments were developed and implemented under my direction or supervision in accordance with a system
designed to assure that qualified personnel properly gather and evaluate the information required by the SPPP.
Based on my inquiry of the person or persons who manage the system, or those persons directly responsible
for gathering the information, the information gathered is, to the best of my knowledge and belief, true,
accurate and complete."
And
"I certify that the SPPP has been developed, signed and retained at the named facility location, and the SPPP
has been fully implemented at this facility location in accordance with the terms and conditions of the
stormwater discharge permit."
And
"I am aware that there are significant penalties for falsifying information, including the possibility of fines and
imprisonment for knowing violations."
Sign (according to permitsignatory requirements), and return this Certification: DO NOT ;
SEND STORMWATER•PCL OUTION PREVENTION KI.MWITUTHIS CERTIFICATION.
Signature i
Print or type name of person signing above
Date 1��3ry / <--
z:>&C*c
Title
SPPP Certification 10/13

..�-� __ ai'. .i' _. -•• - j 1 � r� � Yam'`
�i
•� -� �✓r G.- yam.'?� �-�� • - -
O UiyiialGlobe-
rf thle GleUser Comp, ,
C H R O M I U M
:heroical Manufacturing Facility
Appendix 1
General Location Mar
W G S_ 1984_ W e b_ M e r ca to r_A u x i l i a ry_S p h e re
WKID: 3857 Authority: EPSC

DRAINAGE AREAS
ZONE
TOTAL IMPERVIOUS
PROCESS
21.84 ACRES 21.49 ACRES (98.4i)
WTERLINOIT
WATER
M
Milivi ENT)
AREA 001
28.32 ACRES 1.19 ACRES (4.2%)
AREA 002
45.71 ACRES 6.49 ACRES (14.1X)
'AS CALCULATED w/ CADD
L
FLOODED WARRY� •`'.�`
- I II �OoQ O Q•,
Q D U •�. AREA 001
/I f FLOODED QUARRY
�'` -�• — `` % ; , it _ %,
CLOSED LAGOON
Itrtr
AREA 002
WATER r /�
ff -
INTNfE
® l ll
—« DRAINAGE AREA 90U 0A
REGULATED DISCHARGE STMICNRES
ROW UIRECTIOIN WDICATORS
001 CURRENT IxOVS1TIAL DISCHARGE POINTS
SD001 PERMITTED STRONMATER PUNTS
ED DRAINAGE AREAS
QED DRAINAGE AREAS
RANT SITE PLAN (M9290105-E.DGN)
L ISSUE
REASONS
-Lj
Illy
RECF
Now I)
" 1J
--
r,•
SCALE
Di
a300 1000 - - -- - - - - - - - - - -
�T cr, [TING
OTHER APPROVALS: PLANT AP ROV APPROVAL O'D.LDR IEIlIGFL DATE
Ba.ELEMENTIS
NECHAIKLAL
ELECT.k INST. +ac xc
PROCESS
PRI CASTLE HAYNIE PLANT
DRAWN BY: I AT OATEN+ STORMWATER PaUTON PREVENTION PLAN SITE MAP
DESG.CAL.BY: DATE
CHECKED BY: nAIE
Na REASONS DRWN CHKO APP DATE SCALE: SEE BAR SCALE AREA NO. 0011 FILANT I DWG.ND. 3Yg987—t7 0

CHROMIUM
CERTIFIED MAIL 91 7199 9991 7033 0439 7634
RETURN RECEIPT REQUESTED
October 3 I. 2014
STORMWATF-R INDIVIDUAL. PERMIT COVERACE RENEWAL
Stormwater Permitting Unit
1612 Mail Service Center
Raleigh. NC 27699-1612
lie: N PD ES STORanvATER PE RM IT R ENEWAL
NCS000003— ELEMENrIS CII RONI I U N1, INC CASTLE IIAYNE PLANT
Dear Mr. Weaver
Enclosed please find the original and two copies of the completed NPDES Permit Application for renewal of this
Facility's NPDES permit, Permit Number NCS000003. Our current permit expires at midnight on April 30, 2015.
Elementis Chromium, Inc (Elementis) hereby respectively requests renewal of NPDES Permit Number NCS000003
for the above referenced facility.
Please note that there have been no changes at the facility since issuance of the last permit. Thank you for your
efforts with this renewal. If you have any questions or concerns, please do not hesitate to contact me at (910) 675-
7229.
Sincerely,
Paul Fox
Director of Operations
Enclosures
RECEIVED
NOV 0 3 2014
DEN,R-LAND QUALITY
STORMWATER PERMITTING
Elementis Chromium
5408 1lolly Shelter Road
Castle Hayne, NC 28429
Telephone: [phone]
Facsimile: t910) 675-7201

Renewal Application for
National Pollutant Discharge Elimination System
Stormwater Individual Permit
Elementis Chromium
Castle Hayne, New Hanover County, North Carolina
October 2014
Prepared for:
CHROMIUM
Elementis Chromium Inc.
5408 Holly Shelter Road
Castle Hayne, North Carolina 28429
Prepared by:
SCItNC! &E!lGiNEF%IttG PItC
Coury Science & Engineering, PLLC
471 Royal Tern Drive
Hampstead, North Carolina 28443

Section1: Introduction ...................................... ............................ ............................ ...............
................................... 3
PermitRequest and Permit Fees ....... .......................................................................................................................
3
FacilityInformation...................................................................................................................................................
3
DocumentOrganization ... .................................................................................................................
........................ 3
Section2: Site Information ....................................... ................ ...................................................................................
4
SiteLocation ...... --- ...... ............:.........:.:..................................................................................................................
4
Description of Industrial Activity ......... ......... ...:..... ........... .....................................................
4
Description of Stormwater Outfall ........ ......... ......... ......... ..................................................
5
sitemap....................................................................................................................................................................
6
Section 3: Monitoring Summary..............................................................................:...................................................
6
Qualitative Monitoring ................... .................... ............. .........
............... 6
QuantitativeMonitoring...........................................................................................................................................
6,
Section 4: Best Management Practices .............:........ .........................:..::......:..:...........:..,........................
9
Good Housekeeping .......................................................
............. 9
Preventative Maintenance.......................................................................................................................................
9
Removal, Cover, or Control of Industrial Activities...................................................................................................
9
VisualInspections ............. ........ .......... ........ .............................................................
9
Spill Prevention and Response.................................................................................................................................
9
Sediment and Erosion Control..................................................................................................................................
9
Management of Runoff ........................ ......... ........ ........ .
....... ........, ............ 10
EmployeeTraining..................................................................................................................................................
10
Recordkeeping........................................................................................................................................................
10
Section5: Application Form.......................................................................................................................................
11
Section6: SWPPP Certification ....................................... ................ ...........................................................................
12
Appendix1 General Location Map......................................................................................................................
13
Appendix2 Site Map............................................................. .......... .............. :...............................
....................... 14
Page 2 of 14

Elementis Chromium, Inc (Elementis) operates a sodium dichromate, chromic acid, and sodium sulfate
manufacturing facility in Castle Hayne, New Hanover County, North Carolina. Elementis falls under the standard
industrial classification (SIC) code of 2819 for Industrial Inorganic Chemical (not elsewhere classified)
manufacturing. Elementis Chromium currently operates under Individual NPDES Stormwater Permit No.
NCS0000003 which was issued on May 1, 2010.
In accordance with Part II Section A of permit NCS0000003, the site has developed and implemented a Stormwater
Management Plan and Stormwater Pollution Prevention Plan (SWPPP) which incorporates all applicable elements.
PERMIT REQUEST AND PERMIT FEES
The purpose of this application is for Individual NPDES Stormwater Permit Renewal. The current NPDES
Stormwater Permit expires on April 30, 2015. There are no fees associated with the individual NPDES stormwater
permit renewal.
FACILITY INFORMATION
The physical and mailing address for Elementis is as follows:
5408 Holly Shelter Road
Castle Hayne, North Carolina 28429
To facilitate review of this application, please contact the following individual identified below.
Preparer's Contact:
Sean Coury, PE (NC)
Partner
Coury Science & Engineering, PLLC
[phone]
[e-mail]
DOCUMENT ORGANIZATION'
This permit application is divided into seven sections and four appendices. Tables are included throughout the
document and are referenced in the table of contents. The seven sections and four appendices are as follows:
Section 1
Introduction
Section 2
Site Information
Section 3
Monitoring Summary
Section 4
Best Management Practices
Section 5
Application Form
Section 6
SWPPP Certification
Appendix 1
General Location Map
Appendix 2
Site Map
Refer to the table of contents for a detailed listing of tables and figures.
Page 3 of 14

This section provides information on the site location and location of industrial activities.
SITE LOCATION
Elementis Chromium is located in Castle Hayne, New Hanover County, North Carolina. The approximate
coordinates are LAT 34.3505 and Long-77.85918. The facility is situated along the Cape Fear River, which is a class
B, Sw stream in the Cape Fear River Basin. A general location map can be found in Appendix 1. The stormwater
outfall covered by the Individual NPDES Stormwater Permit No. NCS0000003 discharges to the Northeast Cape
Fear River. The Northeast Cape Fear River is on the 303(d) (Impaired Waters) list for mercury.
DESCRIPTION OF INDUSTRIAL ACTIVITY
Elementis — Castle Hayne is a manufacturer of sodium dichromate, chromic acid, and sodium sulfate which is
produced from chromite ore, soda ash, lime and sulfuric acid. Chromite ore is first sent through a dryer and then
pulverized to a powder in one (1) of four (4) on -site ball mills. The pulverized ore is combined with lime, sodium
carbonate (soda ash), and recycle residue prior to being fed to one (1) of three (3) on -site kilns. The ore mixture is
heated to approximately 2000 degrees Fahrenheit in the kiln. This treatment oxidizes the chromite ore, converting
the majority of the chromium in the ore from trivalent to hexavalent chromium. The roasted mixture of pulverized
ore, lime, recycled residue, and soda ash is quenched and leached with water in tanks, producing a sodium
chromate solution and solid ore residues.
After leaching, the mixture is sent through hydroclones to separate the sodium chromate solution from
unconverted ore residue. The unconverted ore (recycle residue and post leach ore residue) is sent to the recycle
residue process to be returned to the process to make up 50%of the initial kiln feed mixture.
After the hydroclones, the leached sodium chromate mixture is neutralized with sulfuric acid or chrome
contaminated acid generated from the chromic acid process from a 12 to 13 pH to a pH of 8.5. After
neutralization, the mixture is sent through a primary and secondary rotary reject filter to separate the sodium
chromate solution from the waste solid residue (reject residue or spent post neutralization ore residue). This
reject residue is sent directly to the 43 Repulp Tank which operates as a holding tank prior to being sent to the
wastewater treatment system.
The sodium chromate is then sent through a calcium precipitator, a filter, and an acidifier where sulfuric acid and
soda ash are added to reduce the pH to 5 and precipitate the remaining ore residues to convert the sodium
chromate solution to sodium dichromate. The sodium dichromate is evaporated after leaving the acidifier and
sent through a final filtering process.
The liquid sodium dichromate is either crystallized to form a sodium dichromate solid crystal product or remains as
liquid sodium dichromate and is piped to the chromic acid process to make chromic acid.
Chromic Acid
The sodium dichromate liquid, with an 85% concentration, is reacted with sulfuric acid to produce chromic acid.
After reacting, the chromic acid solution is filtered, melted, and rolled to produce the chromic acid in solid flake
form. The air pollution control system in the chromic acid process is associated with the filtering, melting,
conveyancing, and packaging processes. The melting and filtering processing is connected to the Main Scrubber
Page 4 of 14

and the conveyancing and packaging process is connected to the Packaging Scrubber. Both the Main Scrubber and
the Packaging Scrubber is connected to the Brownian Demister before being vented to the atmosphere. The
wastewater that exits the Packaging Scrubber is reused in the Neutralization square tank in the production of
sodium dichromate. The wastewater from the Main Scrubber is sent to the #3 Repulp tank prior to being sent to
the wastewater treatment system. There is a wastewater that is generated in the Brownian Demister Unit that is
sent to the #3 Repulp tank prior to being sent to the wastewater treatment system.
Sodium Sulfate
After the acidifier in the production of sodium dichromate, the product stream is evaporated and centrifuged to
separate sodium sulfate (saltcake) from the sodium dichromate solution. The sodium sulfate saltcake is sent to a
salt cake purification unit for purification and then sold as purified sodium sulfate anhydrous. The wastewater
residue from the saltcake purification unit is reinserted to the manufacturing process at the leach and filter unit.
There have been no changes to the industrial activities at the permitted facility, including no changes to work
processes, material handling procedures, material storage practices, or raw materials used at the facility, since the
last NPDES stormwater permit was issued.
DESCRIPTION OF STORMWATER OUTFALL
The site is broken into three drainage areas (Process Area, Area 1, and Area 2). A detailed description of the three
areas is detailed in the section below.
Process Areas
All storm water falling in the process areas of the plant is either processed within the area or collected and sent to
the wastewater treatment area to be treated before discharging. The facility has an underground conveyance
system that conveys water to a stormwater holding tank prior to being sent to the onsite industrial wastewater
treatment facility. The aforementioned stormwater is covered under NPDES Wastewater Permit NC0003875;
therefore, is exempt from stormwater permitting requirements.
SDO01
Elementis currently has one permitted outfall (SDO01) which discharges to the Northeast Cape Fear River. The
outfall location is just north of the North Ore Pad. The SDO01 Outfall drains the North Ore Pad and discharges
directly into the Northeast Cape Fear River.
Area 1
Area 1 drains the areas west and north of the Process Area and discharges directly into the Northeast Cape Fear
River. It includes approximately two-thirds of the capped lagoon north of the facility, the Salt Cake Purification
Facility northwest of the site, and the railroad tracks and surrounding grassland along the West Side of the plant.
The process activities currently taking place in this drainage basin is the unloading of dry crushed limestone and
lime just west of the wastewater treatment area of the plant, and the purification of salt cake. Pipelines carrying
treated solid wastes from the wastewater treatment area to the quarries run through the area both above and
below ground. Locations where these lines run above ground are diked and channeled to the quarries. All of the
runoff associated with area 1 is sheet flow, so there is not a point source discharge associated with the runoff from
area 1.
Page 5 of 14

Area 2
Area 2 drains the areas south and east of the Process Area and discharges into a creek leading to the Northeast
Cape Fear River. Its drainage basin includes part of the office buildings, the paved employee parking lots, the ore
storage piles east of the site, several maintenance storage buildings, the covered and fully contained hazardous
waste storage building, the railroad tracks northeast of the site, open loose stone and grassy areas, and heavily
wooded areas. The only process activity taking place within these areas is a shot blasting and spray painting
operation. All of the runoff associated with area 2 is sheet flow, so there is not a point source discharge associated
with the runoff from area 2.
SITE MAP
The site map which includes the locations of industrial activities (including storage of materials, disposal areas,
process areas and loading and unloading areas), drainage structures, drainage areas for each outfall, and building
locations and impervious surfaces) in located in Appendix 2.
(SEG.T.ION�37MONI:T,ORING�S j—MWARY
This section provides a summary of the qualitative and quantitative stormwater sampling conducted for Outfall
SDO01 during the period of the current permit, May 1, 2010 to present.
QUALITATIVE MONITORING
Qualitative, visual monitoring of the outfall effluent is conducted at least semiannually for Outfall SDO01. These
monitoring events are conducted during a qualifying rain event. During qualitative monitoring, the effluent is
observed for color, odor, clarity, oil sheen, solids, and foam. The results of the qualitative monitoring conducted
since May 1, 2010 is summarized in Table 3-1.
QUANTITATIVE MONITORING
Quantitative monitoring of the outfall effluent is conducted at least semiannual for Outfall SDO01 according to the
monitoring schedule found in Table 2 of the permit. The results of the quantitative monitoring conducted since
May 1, 2010 is summarized in Table 3-2.
Page 6 of 14

TABLE 3-1: QUALITATIVE MONITORING
Date/Time Color. Cdof Clarity Floating Susperfded Foam.. Sheen Erosion. Corrective
•1
:solids
30%2010
�Cle_a
_ ' None _
S.+ ;,yYy"'r1it`
Clear,•, �. ,.,None
u _{None ',�.+'..Noney::
None None
None None f. N/A
4/5/11
Clear
None
Good None
l�9+t
,
S
' None,,
.Noner 4 .None -
None None N/A
_11'/,4%11,'4,`,Clear�None
;'Clear �``__,
5/14/12
Clear
None
Good None None None
None None N/A
:alloiD1scharges, <..,' ... ..
2/7/13
Clear
None
Clear
one
None
None
None
None
N/A
>N'orie
None
None
N/A
;"Clear_yNone,.
,�
9_ Clear.--_
.None,''
6/13/14
Clear
None
Clear
None
None
None
-None
None
N/A
Page 7 of 14

TABLE 3-2: QUANTITATIVE MONITORING RESULTS
jincheo
il/30/2010 1.8 _ 0:035 '0:165. - '7.07 "
4/5/11
0.24
0.078
0.27 6.98
11/4/11
-0.12 _
0.238 - -
0.41, 7.07
5/14/12
0.74
0.301
- 0.27 7.07
2.dHalf.2012. '.
'..'. ". --: - :.._ .. :. 'No,Discharge.
2/7/13
- �1.73 -
- 0.041
- 0.07
_ 7.61
•9/16/13 .
. 0.97
0.0319 -
0.44 - -
- "6.78
6/13/14
1.33
0.23
0.66
6.65
Page 8 of 14

1SEC�N�� BE' ESTfMN AGE MEN UPPaRA�C ICES
As specified in Part 11 of Permit NCS000003, Elementis is required to develop and implement best management
practices to reduce the potential for pollutants entering the storm water runoff from the facility. While a detailed
description of each of these best management practices is maintained in the site's Stormwater Pollution Prevention
Plan, a brief summary of each practice has been included below.
GOOD HOUSEKEEPING
Elementis employs the use of Good Housekeeping practices to maintain areas, which may contribute pollutants to
storm water, discharges in a clean and orderly manner. Good housekeeping practices are stressed in all employee
training programs.
PREVENTATIVE MAINTENANCE
Elementis has a preventive maintenance program in place for its plant operations which involves the regular
inspection and testing of plant equipment and operational systems to uncover conditions which could result in
discharges of chemicals to the plant storm water conveyance system and to the surrounding surface waters.
REMOVAL, COVER, OR CONTROL OF INDUSTRIAL ACTIVITIES
Elementis strives to eliminate, whenever possible, the inclusion of process area rainfall and runoff from entering
storm water discharges. Storm water that falls in process areas of the plant is either collected and used in the
process or drained to an internal storm water system for treatment before being discharged through permitted
industrial discharges.
VISUAL INSPECTIONS
Regular visual inspections are performed to insure that all the elements of the SWPPP are in place and working
properly. Such inspections are meant to be a routine look -over of the facility to identify conditions, which may
give rise to contamination of storm water run-off with pollutants from the plant. Items covered by the visual
inspections include areas around all process and maintenance equipment; areas where spills and leaks have
occurred in the past; material storage areas; material handling areas; outdoor material processing areas; and
waste generation, storage, treatment and disposal areas. Formal inspections of the stormwater conveyances are
also conducted at least twice annually.
SPILL PREVENTION AND RESPONSE
Elementis has developed the SPCC plan for the plant, which addresses the subject of spill prevention and response.
The purpose of the plan is to prevent and control discharges of oil from spill events that have the potential to
reach navigable waterways of both the State of North Carolina and the United States. It details the duties and
responsibilities of both trained and non -trained responders. The plan is reviewed at least once every three years
and will be amended as necessary to include more effective spill prevention and control technology.
SEDIMENT AND EROSION CONTROL
Page 9 of 14

Plant areas that may be subject to routine vehicular traffic are covered with stone to minimize erosion potential,
while areas that are not exposed are grassed. Areas outside the main production areas that have not been
developed remain naturally wooded. Areas under construction contain silt fences as needed to control
sedimentation runoff.
MANAGEMENT OF RUNOFF
All storm water falling in the process areas of the plant is either processed within the area or collected and sent to
the wastewater treatment area to be treated before discharging.
EMPLOYEE TRAINING
Facility personnel responsible for managing hazardous wastes, materials, and oil, are required to attend corporate
hazardous waste management training courses. In addition, each site employee undergoes annual stormwater
pollution prevention training annually. Employee training records are maintained on site.
RECORDKEEPING
Records are maintained on site for all formal inspections, preventative maintenance work, employee training, and
visual storm water inspections. In addition, copies of all agency correspondence and Incident/Release reports are
kept on file.
Page 10 of 14

STORMWATER POLLUTION PREVENTION PLAN
DEVELOPMENT AND IMPLEMENTATION
CERTIFICATION
North Carolina Division of Energy, Mineral, and Land Resources - Stormwater Permitting
Facility Name:
Permit Number:
Location Address:
County:
J �
"I certify, under penalty of law, that the Stormwater Pollution Prevention Plan (SPPP) document and all
attachments were developed and implemented under my direction or supervision in accordance with a system
designed to assure that qualified personnel properly gather and evaluate the information required by the SPPP.
Based on my inquiry of the person or persons who manage the system, or those persons directly responsible
for gathering the information, the information gathered is, to the best of my knowledge and belief, true,
accurate and complete."
And
I certify that the SPPP has been developed, signed and retained at the named facility location, and the SPPP
has been fully implemented at this facility location in accordance with the terms and conditions of the
stormwater discharge permit."
And
"I am aware that there are significant penalties for falsifying information, including. the possibility of fines and
imprisonment for knowing violations."
Sign (according to permit signatory requirements) and return this Certification. DQ.NQ'r
SEND STORM�VATER POLLUTION PREVENTION PLANNVITH THIS CERTIFICATION.
Signature / Date iol3cl
Print or type name of person signing above Title
SPPP Certification 10/13

JP Permit Coverage NPDES Permit Number
NCDENR Renewal Application Form NCS000003
National Pollutant Discharge Elimination System
Stormwater Individual Permit
Please provide your permit number in box in the upper right hand corner, complete the information in the space provided
below and return the completed renewal form along with the required supplemental information to the address indicated.
Owner Information
* Address to which permit correspondence will be mailed
Owner / Organization Name:
Elementis Chromium Inc.
Owner Contact:
Paul Fox, Direction of Operations
Mailing Address:
5408 Holly Shelter Rd
Castle Hayne, NC 28429
Phone Number:
_(910) 675-7229
Fax Number:
_(910) 675-7201
E-mail address:
[e-mail]
RECEIVED
Facility Information
Facility Name:
Elementis Chromium Inc
NOV Q 3 2014
Facility Physical Address:
5408 Holly Shelter Rd
Castle Hayne, NC 28429
DENR-LAND QUALITY
Facility Contact:
Calvin Overcash, Regulatory Manager
UORMWATER PERNIRTINu
Mailing Address:
5408 Holly Shelter Rd
Castle Hayne, NC 28429
Phone Number:
[phone]
Fax Number:
[phone]
E-mail address:
[e-mail]
Permit Information
Permit Contact:
Calvin Overcash
Mailing Address:
5408 Holly Shelter Rd
Castle Hayne, NC
Phone Number:
910-675-7229
Fax Number:
910-675-7201
E-mail address:
[e-mail]
Discharoe Information
Receiving Stream:
Stream Class:
Basin:
Sub -Basin:
Number of Outfalls
Facility/Activity Changes Please describe below any changes to your facility or activities since issuance of your permit. Attached a
separate sheet if necessary.
No changes since last
CERTIFICATION
I certify that I am familiar with the information contained in the application and that to the best of my knowledge and belief
such information is true, complete and accurate. /
Signature �—� lq l�
PAvL Pnx
Print or type name of person signing above
Date
Title
SW Individual Permit Coverage Renewal
Please return this completed application form Stormwater Permitting Program
and requested supplemental information to: 1612 Mail Service Center
Raleigh, North Carolina 27699-1612

/ Lam.L
C H R O M I U M
:hemical Manufacturing Facility
r
U
�\ i
�` J J � •1
i
Csri. Dee onne NA TEO. TwhTom Copyn__ i,t•. 201 Pint io nal Geographic Society i�
sn. Dl ptalClObe / eoEye i-cursed- USDA./6I GS AEX Getmapping Aerogno- ION I, tP
Appendix 1
General Location Mar
WGS_1984_Web Mercator Auxiliary_Sphert
WKID 3857 Authority EPSC

LEGEND
-- DRANAGE AREA BOIRIDARIES
REGULATED OISpIARM STRUCTURES
—► FI.OW OIRECRON lmmuTORS
ool CURRENT INDUSTRIAL OISOIIARGE POINTS
SDO01 PERMITTED STROMWATER POINTS
!GALE
D Sob lobo
CgpE,
Feq
DRAINAGE AREAS
ZONE
TOTAL IMPERVIOUS
- PROCESS
21.84 ACRES 21.49 ACRES (98.4X)
(OTOR RNNaFT
TO WASTE s1E WTEn
,REA,WFNn
AREA 001
28.32 ACRES 1.19 ACRES (4.2X)
AREA 002
45.71 ACRES 6.49 ACRES (14.1%)
'AS CALCULATED IN/ CADD
AREA 002
wTm
NrANE ^'
_'b °-lom RECEIVED
NOV 0 3 2014
DEKR-L M,ID QW11 TY
ST0RPv1WATERFtkiviiTliNG
PROW: 'D.tDR ENGR DATE
R.A°"L ELEMENTIS
ECT.& INSi,
NL
Oms uaze w�wc .e
O55
: CT CASTLE HAVNE PLANT
:AWN BY-. ART DATE..
5ft BY-.: DATE �+STORMNATER POLLUTION PREVENTION PLAN SITE MAP
ECNED BY: BAT
CfpiF4T RAN SCYF I pRFp Nf1 (SNRWT ItTWO NT: tYTWILT_1

C H R O M I U M
CERTIFIED MAIL 91 7199 9991 7033 0439 7634
RETURN RECEIPT REQUESTED
October 31. 2014
STORNDVATER INDIVIDUAL PERN11I COVERAGE RENEWAL
Stormwater Pennitting Unit
1612 Mail Service Center
Raleigh, NC 27699-1612
RE: NPDES STORMWATFR PERNIIr RENE"AL
NCS000003— ELENIENTIS CHROMIUM, INC CASTLE IIAYNE PLAW
Dear Mr. Weaver:
Enclosed please find the original and two copies of the completed NPDES Permit Application for renewal of this
facility's NPDES permit, Permit Number NCS000003. Our current permit expires at midnight on April 30, 2015.
Elementis Chromium, Inc (Elementis) hereby respectively requests renewal of NPDES Permit Number NCS000003
for the above referenced facility.
Please note that there have been no changes at the facility since issuance of the last permit. Thank you for your
efforts with this renewal. If you have any questions or concerns, please do not hesitate to contact me at (910) 675-
7229.
Sincerely,
Paul Fox
Director of Operations
Enclosures
RECEIVES
NOV 0 3 2014
DENR-LAND OI! -LITY
STORMWATER PERNIt'il ING
filansntis Ch1nmium
5408 Holly Shelter Road
Castle tlayne, NC 28429
Telephone:[phone]
Facsimile: [phone]

Renewal Application for
National Pollutant Discharge Elimination System
Stormwater Individual Permit
Elementis Chromium
Castle Hayne, New Hanover County, North Carolina
October 2014
Prepared for:
El; 1v1EI TIS
CHROMIUM
Elementis Chromium Inc.
5408 Holly Shelter Road
Castle Hayne, North Carolina 28429
Prepared by:
SCIENCE 3 E ti G I N'. E: I t: G. FttC
Coury Science & Engineering, PLLC
471 Royal Tern Drive
Hampstead, North Carolina 28443

Section1: Introduction................................................... ....................... ......,..,.......... ...................
............................... 3
Permit Request and Permit Fees..............................................................................................................................
3
FacilityInformation...................................................................................................................................................
3
DocumentOrganization............................................................................................................................................
3
Section2: Site Information.........................................................................................................................................
4
SiteLocation ............. --- ... .....................................................................................................................................
4
Description of Industrial Activity .........:. .............. ... :.:...... ..... ....... ..........
......... .............. 4
Descriptionof Stormwater Outfall ......... .................................. .............................
...................................... 5
sitemap..............................................:.....:::.............................................................................................................
6
Section3: Monitoring Summary...................................................................................................
Qualitative Monitoring .................... ......... .........
............. 6
Quantitative Monitoring........................................................................
...................... 6
Section 4: Best Management Practices . .............. -........ .................... ..........................................................................
9
GoodHousekeeping .... ...... ..................... .....................................................................................
........... 9
PreventativeMaintenance.......................................................................................................................................
9
Removal, Cover, or Control of Industrial Activities... .............. ...............................
................................................. 9
VisualInspections ..................... ................ .................... ............ ..........................................................................
..... 9
Spill Prevention and Response..................................................................................................................................
9
Sediment and Erosion Control..................................................................................................................................
9
Managementof Runoff........................ ............................ :.............. :....... :.:.:............
............... ............... ....,............ 10
EmployeeTraining...................................................................................................................,............_...................
10
Recordkeeping.......................................................................................................................................
..... 10
Section5: Application Form.......................................................................................................................................
11
Section 6: SWPPP Certification..................................................................................................................................
12
Appendix 1 General Location Map ..................................................... ................................
................................. 13
Appendix2 Site Map ........................... ........ ......... ............... .................................................................................
14
Page 2 of 14

Elementis Chromium, Inc (Elementis) operates a sodium dichromate, chromic acid, and sodium sulfate
manufacturing facility in Castle Hayne, New Hanover County, North Carolina. Elementis falls under the standard
industrial classification (SIC) code of 2819 for Industrial Inorganic Chemical (not elsewhere classified)
manufacturing. Elementis Chromium currently operates under Individual NPDES Stormwater Permit No.
NCS0000003 which was issued on May 1, 2010.
In accordance with Part II Section A of permit NCS0000003, the site has developed and implemented a Stormwater
Management Plan and Stormwater Pollution Prevention Plan (SWPPP) which incorporates all applicable elements.
PERMIT REQUEST AND PERMIT FEES
The purpose of this application is for Individual NPDES Stormwater Permit Renewal. The current NPDES
Stormwater Permit expires on April 30, 2015. There are no fees associated with the individual NPDES stormwater
permit renewal.
FACILITY INFORMATION
The physical and mailing address for Elementis is as follows:
5408 Holly Shelter Road
Castle Hayne, North Carolina 28429
To facilitate review of this application, please contact the following individual identified below.
Preparer's Contact:
Sean Coury, PE (NC)
Partner
Coury Science & Engineering, PL-C
[phone]
[e-mail]
DOCUMENT ORGANIZATION
This permit application is divided into seven sections and four appendices. Tables are included throughout the
document and are referenced in the table of contents. The seven sections and four appendices are as follows:
Section 1
Introduction
Section 2
Site Information
Section 3
Monitoring Summary
Section 4
Best Management Practices
Section 5
Application Form
Section 6
SWPPP Certification
Appendix 1
General Location Map
Appendix 2
Site Map
Refer to the table of contents for a detailed listing of tables and figures.
Page 3 of 14

This section provides information on the site location and location of industrial activities.
SITE LOCATION
Elementis Chromium is located in Castle Hayne, New Hanover County, North Carolina. The approximate
coordinates are LAT 34.3505 and Long-77.85918. The facility is situated along the Cape Fear River, which is a class
B, Sw stream in the Cape Fear River Basin. A general location map can be found in Appendix 1. The stormwater
outfall covered by the Individual NPDES Stormwater Permit No. NCS0000003 discharges to the Northeast Cape
Fear River. The Northeast Cape Fear River is on the 303(d) (Impaired Waters) list for mercury.
DESCRIPTION OF INDUSTRIAL ACTIVITY
Elementis — Castle Hayne is a manufacturer of sodium dichromate, chromic acid, and sodium sulfate which is
produced from chromite ore, soda ash, lime and sulfuric acid. Chromite ore is first sent through a dryer and then
pulverized to a powder in one (1) of four (4) on -site ball mills. The pulverized ore is combined with lime, sodium
carbonate (soda ash), and recycle residue prior to being fed to one (1) of three (3) on -site kilns. The ore mixture is
heated to approximately 2000 degrees Fahrenheit in the kiln. This treatment oxidizes the chromite ore, converting
the majority of the chromium in the ore from trivalent to hexavalent chromium. The roasted mixture of pulverized
ore, lime, recycled residue, and soda ash is quenched and leached with water in tanks, producing a sodium
chromate solution and solid ore residues.
After leaching, the mixture is sent through hydroclones to separate the sodium chromate solution from
unconverted ore residue. The unconverted ore (recycle residue and post leach ore residue) is sent to the recycle
residue process to be returned to the process to make up 50%of the initial kiln feed mixture.
After the hydroclones, the leached sodium chromate mixture is neutralized with sulfuric acid or chrome
contaminated acid generated from the chromic acid process from a 12 to 13 pH to a pH of 8.5. After
neutralization, the mixture is sent through a primary and secondary rotary reject filter to separate the sodium
chromate solution from the waste solid residue (reject residue or spent post neutralization ore residue). This
reject residue is sent directly to the N3 Repulp Tank which operates as a holding tank prior to being sent to the
wastewater treatment system.
The sodium chromate is then sent through a calcium precipitator, a filter, and an acidifier where sulfuric acid and
soda ash are added to reduce the pH to 5 and precipitate the remaining ore residues to convert the sodium
chromate solution to sodium dichromate. The sodium dichromate is evaporated after leaving the acidifier and
sent through a final filtering process.
The liquid sodium dichromate is either crystallized to form a sodium dichromate solid crystal product or remains as
liquid sodium dichromate and is piped to the chromic acid process to make chromic acid.
Chromic Acid
The sodium dichromate liquid, with an 85% concentration, is reacted with sulfuric acid to produce chromic acid.
After reacting, the chromic acid solution is filtered, melted, and rolled to produce the chromic acid in solid flake
form. The air pollution control system in the chromic acid process is associated with the filtering, melting,
conveyancing, and packaging processes. The melting and filtering processing is connected to the Main Scrubber
Page 4 of 14

and the conveyancing and packaging process is connected to the Packaging Scrubber. Both the Main Scrubber and
the Packaging Scrubber is connected to the Brownian Demister before being vented to the atmosphere. The
wastewater that exits the Packaging Scrubber is reused in the Neutralization square tank in the production of
sodium dichromate. The wastewater from the Main Scrubber is sent to the 43 Repulp tank prior to being sent to
the wastewater treatment system. There is a wastewater that is generated in the Brownian Demister Unit that is
sent to the #3 Repulp tank prior to being sent to the wastewater treatment system.
Sodium Sulfate
After the acidifier in the production of sodium dichromate, the product stream is evaporated and centrifuged to
separate sodium sulfate (saltcake) from the sodium dichromate solution. The sodium sulfate saltcake is sent to a
salt cake purification unit for purification and then sold as purified sodium sulfate anhydrous. The wastewater
residue from the saltcake purification unit is reinserted to the manufacturing process at the leach and filter unit.
There have been no changes to the industrial activities at the permitted facility, including no changes to work
processes, material handling procedures, material storage practices, or raw materials used at the facility, since the
last NPDES stormwater permit was issued.
DESCRIPTION OF STORMWATER OUTFALL
The site is broken into three drainage areas (Process Area, Area 1, and Area 2). A detailed description of the three
areas is detailed in the section below.
Process Areas
All storm water falling in the process areas of the plant is either processed within the area or collected and sent to
the wastewater treatment area to be treated before discharging. The facility has an underground conveyance
system that conveys water to a stormwater holding tank prior to being sent to the onsite industrial wastewater
treatment facility. The aforementioned stormwater is covered under NPDES Wastewater Permit NC0003875;
therefore, is exempt from stormwater permitting requirements.
SD001
Elementis currently has one permitted outfall (SDO01) which discharges to the Northeast Cape Fear River. The
outfall location is just north of the North Ore Pad. The SD001 Outfall drains the North Ore Pad and discharges
directly into the Northeast Cape Fear River.
Area 1
Area 1 drains the areas west and north of the Process Area and discharges directly into the Northeast Cape Fear
River. It includes approximately two-thirds of the capped lagoon north of the facility, the Salt Cake Purification
Facility northwest of the site, and the railroad tracks and surrounding grassland along the West Side of the plant.
The process activities currently taking place in this drainage basin is the unloading of dry crushed limestone and
lime just west of the wastewater treatment area of the plant, and the purification of salt cake. Pipelines carrying
treated solid wastes from the wastewater treatment area to the quarries run through the area both above and
below ground. Locations where these lines run above ground are diked and channeled to the quarries. All of the
runoff associated with area 1 is sheet flow, so there is not a point source discharge associated with the runoff from
area 1.
Page S of 14

Area 2
Area 2 drains the areas south and east of the Process Area and discharges into a creek leading to the Northeast
Cape Fear River. Its drainage basin includes part of the office buildings, the paved employee parking lots, the ore
storage piles east of the site, several maintenance storage buildings, the covered and fully contained hazardous
waste storage building, the railroad tracks northeast of the site, open loose stone and grassy areas, and heavily
wooded areas. The only process activity taking place within these areas is a shot blasting and spray painting
operation. All of the runoff associated with area 2 is sheet flow, so there is not a point source discharge associated
with the runoff from area 2.
SITE MAP
The site map which includes the locations of industrial activities (including storage of materials, disposal areas,
process areas and loading and unloading areas), drainage structures, drainage areas for each outfall, and building
locations and impervious surfaces) in located in Appendix 2.
SECTION 3: MONITQRING,SUMMARY
This section provides a summary of the qualitative and quantitative stormwater sampling conducted for Outfall
SD001 during the period of the current permit, May 1, 2010 to present.
QUALITATIVE MONITORING
Qualitative, visual monitoring of the outfall effluent is conducted at least semiannually for Outfall SD001. These
monitoring events are conducted during a qualifying rain event. During qualitative monitoring, the effluent is
observed for color, odor, clarity, oil sheen, solids, and foam. The results of the qualitative monitoring conducted
since May 1, 2010 is summarized in Table 3-1.
QUANTITATIVE MONITORING
Quantitative monitoring of the outfall effluent is conducted at least semiannual for Outfall SDO01 according to the
monitoring schedule found in Table 2 of the permit. The results of the quantitative monitoring conducted since
May 1, 2010 is summarized in Table 3-2.
Page 6 of 14

LE 3-1: QUALITATIVE MONITORING RESULTS
. . --. B. •..__•. .... '. ._- __.. ._.. �. .Sus_
Date/Time Color Odor Clarnf y : Floating'pended Foam., Sheen Erosion. Corrective ,
FIETaii
Solids
Solids
•11%30/2010
. Clear,
Clear'
-None
None
None'
None
None
.N/A
4/5/11
ClearGood
None
None
None
-None
None
N/A
1-114111
Clear
7None
Clear-
None
- None
'None
'None.
None
N/A
5/14/12
ClearGood
None
None
None
None
None
N/A
2°a-Half20oil
12.--.
.v " _ ..
'. ,-.
.. ..
.No'bischarge..
2/7/13
Clear .
None
Clear
None
None
None
None
None
N/A
_9/16/13
Clear
None
Clear
None
.None=-
None
Norie
«None
N/A�
6/13/14
Clear
None
Clear
None
None
None
None
None
N/A
Page 7 of 14

TABLE 3-2: QUANTITATIVE MONITORING RESULTS
Page 8 of 14

As specified in Part II of Permit NCS000003, Elementis is required to develop and implement best management
practices to reduce the potential for pollutants entering the storm water runoff from the facility. While a detailed
description of each of these best management practices is maintained in the site's Stormwater Pollution Prevention
Plan, a brief summary of each practice has been included below.
GOOD HOUSEKEEPING
Elementis employs the use of Good Housekeeping practices to maintain areas, which may contribute pollutants to
storm water, discharges in a clean and orderly manner. Good housekeeping practices are stressed in all employee
training programs.
PREVENTATIVE MAINTENANCE
Elementis has a preventive maintenance program in place for its plant operations which involves the regular
inspection and testing of plant equipment and operational systems to uncover conditions which could result in
discharges of chemicals to the plant storm water conveyance system and to the surrounding surface waters.
REMOVAL, COVER, OR CONTROL OF INDUSTRIAL ACTIVITIES
Elementis strives to eliminate, whenever possible, the inclusion of process area rainfall and runoff from entering
storm water discharges. Storm water that falls in process areas of the plant is either collected and used in the
process or drained to an internal storm water system for treatment before being discharged through permitted
industrial discharges.
VISUAL INSPECTIONS
Regular visual inspections are performed to insure that all the elements of the SWPPP are in place and working
properly. Such inspections are meant to be a routine look -over of the facility to identify conditions, which may
give rise to contamination of storm water run-off with pollutants from the plant. Items covered by the visual
inspections include areas around all process and maintenance equipment; areas where spills and leaks have
occurred in the past; material storage areas; material handling areas; outdoor material processing areas; and
waste generation, storage, treatment and disposal areas. Formal inspections of the stormwater conveyances are
also conducted at least twice annually.
SPILL PREVENTION AND RESPONSE
Elementis has developed the SPCC plan for the plant, which addresses the subject of spill prevention and response.
The purpose of the plan is to prevent and control discharges of oil from spill events that have the potential to
reach navigable waterways of both the State of North Carolina and the United States. It details the duties and
responsibilities of both trained and non -trained responders. The plan is reviewed at least once every three years
and will be amended as necessary to include more effective spill prevention and control technology.
SEDIMENT AND EROSION CONTROL
Page 9 of 14

Plant areas that may be subject to routine vehicular traffic are covered with stone to minimize erosion potential,
while areas that are not exposed are grassed. Areas outside the main production areas that have not been
developed remain naturally wooded. Areas under construction contain silt fences as needed to control
sedimentation runoff.
MANAGEMENT OF RUNOFF
All storm water falling in the process areas of the plant is either processed within the area or collected and sent to
the wastewater treatment area to be treated before discharging.
EMPLOYEE TRAINING
Facility personnel responsible for managing hazardous wastes, materials, and oil, are required to attend corporate
hazardous waste management training courses. In addition, each site employee undergoes annual stormwater
pollution prevention training annually. Employee training records are maintained on site.
RECORDKEEPING
Records are maintained on site for all formal inspections, preventative maintenance work, employee training, and
visual storm water inspections. In addition, copies of all agency correspondence and Incident/Release reports are
kept on file.
Page 10 of 14

�SEGT,ION TA PIL'ICATION9F.ORM
��®1a eiwnrr�r�mn nwwm�nn i��m®�

STORMWATERPOLLUTION PREVENTION PLAN
DEVELOPMENT AND.IMPLEMCNTATION
CERTIFICATION
North Carolina Division of Energy, Mineral, and Land Resources - Stormwater Permitting
Facility Name:
Permit Number:
Location Address:
County:
"I certify, under penalty of law, that the Stormwater Pollution Prevention Plan (SPPP) document and all
attachments were developed and implemented under my direction or supervision in accordance with a system
designed to assure that qualified personnel properly gather and evaluate the information required by the SPPP.
Based on my inquiry of the person or persons who manage the system, or those persons directly responsible
for gathering the information, the information gathered is, to the best of my knowledge and belief, true,
accurate and complete."
And
"I certify that the SPPP has been developed, signed and retained at the named facility location, and the SPPP
has been fully implemented at this facility location in accordance with the terms and conditions of the
stormwater discharge permit."
And
"I am aware that there are significant penalties for falsifying information, including the possibility of fines and
imprisonment for knowing violations."
Sign:(according to permit signatory. requirements).and.return this.Certification. DO NOT
SEND STORMIWATER POLLUTION PREVENTION PLAN -WITH THIS CERTIFICATION.
Signature / Date
`MILL �'Z»c n,"C*A a—/ Y6,/ (Vl ) 5
Print or type name of person signing above Title
SPPP Certification 10/13

Z 1 Permit Coverage
NCDENR Renewal Application Form NPDES Permit Number
NCS000003
National Pollutant Discharge Elimination System
Stormwater Individual Permit
Please provide your permit number in box in the upper right hand corner, complete the information in the space provided
below and return the completed renewal form along with the required supplemental information to the address indicated.
Owner Information
Owner / Organization Name:
Owner Contact:
Mailing Address:
Phone Number
Fax Number:
E-mail address
Facilitv Information
Facility Name:
Facility Physical Address
Facility Contact:
Mailing Address:
Phone Number:
Fax Number:
E-mail address:
Permit Information
Permit Contact:
Mailing Address
Phone Number:
Fax Number:
E-mail address:
Discharge Information
Receiving Stream:
Stream Class:
Basin:
Sub -Basin:
Number of Outfalls
* Address to which permit correspondence will he mailed
5408 Holly Shelter Rd
Castle Hayne, NC 28429
[phone]
[phone]
Pau [e-mail]
Elementis Chromium
5408 Holly Shelter Rd
Castle Hayne, NC 28429
Calvin Overcash, Regulatory Manager
5408 Holly Shelter Rd
Castle Hayne, NC 28429
[phone]
[phone]
[e-mail]
Calvin Overcash
5408 Holly Shelter Rd
Castle Hayne, NC
910-675-7229
910-675-7201
[e-mail]
Northeast Cape Fear River
Facility/Activity Changes Please describe below any changes to your facility or activities since issuance of your permit. Attached a
separate sheet if necessary.
No changes since last
CERTIFICATION
I certify that I am familiar with the information contained in the application and that to the best of my knowledge and belief
such information is true, complete and accurate.
Signature Date
PA'L� PnK
Print or type name of person signing above
D166c5e4C In4 O 44r 11 IA
Title
SW Individual Permit Coverage Renewal
Please return this completed application form
Stormwater Permitting Program
and requested supplemental information to: 1612 Mail Service Center
Raleigh, North Carolina 27699-1612

ram• ._, � it
-----------------
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P 1 1 li .'�� __ AEX +ettrapptng Aerogna. IGN I P
CHROMIUM
heroical Manufacturing Facility
Appendix 1
General Location Mai
WGS_1984_Web_Mercator_Auxiliary_Sphere
WKID 3857 Authority: EPSC

DRAINAGE AREAS
ZONE
TOTAL IMPERVIOUS
PROCESS
21.84 ACRES 21.49 ACRES (98.4X)
(S WA1 IRINDfT
1REAMENT) TIF
AREA 001
28.32 ACRES 1.19 ACRES (4.2X)
AREA 002
45.71 ACRES 6.49 ACRES (14.1%)
*AS CALCULATED w/ CADD
NF \CgAE.
F
FLOODED QUARRY `� ��'_-� _ - 2
21
o o j
AREA 001 .
� a
j Q FLOODED QUARRY
jr
CLOSED LAGOON
(om
/ � f''� _ m ���_ / % . :\r.• - � - / ,T..� ��a +�� AREA 002
- lrtiWTERi
1
y
o C i INTAKE
PROCESS
e sip
__ Iy
LEGEND \,.` '/ - _ V .�.`. --9-- ~ RECEI\,,r✓
-- DRAINAGE AREA BOUNDARIES
RE(i1LATED DISQIARCE STRUCTURES SCAU: '�``�•• a - -- _ "1-_�_4_ _#� } "1� "t"PJ"� '+++'!•i _-r _ - - ��
NOV p 3 2044
ROW DIRECTION INOICATDRS a SW IOW
WI CLRRENT INGUSTAAL DISC ARE POINTS
50001 PFI M= 57RMWATM POINTS Dth�R-LAi•;D;-
S70R
D1HER A. .WVA6t PLANT AP RDVAu —A`_ pF-ROVAL 'DADR MM DATE � u,•]
5R C
4A AL ELEMENTIS
UEC, AI
0 REVISED DRAINAGE AREAS RTW E]iCi.N m5i. n.w,c vc
_ C REVISED OT SITEP PRD.EDT CASTLE HAYNE PLANT
AREAS BER PROCESS
B ADD PLANT SITE PLAN (N9290105-E.00N) GNL ..,, DRAWN Br-
* INITIAL ISSUE BST Df5('DALBY. R
STORNWATER POLLUTION PREVENTION PLAN SITE MAP
�.w
C4ECRED Br. _--SATE
Pa DALE NQ REV19CN5 DRwY CNKD APP GATE Cf 'Al C- $f RW Sf:Nf I ARFA Nn (iT B WT I DWf: Alll jWl10R{—f

NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Colleen H. Sullins Dee Freeman
Governor Director Secretary
February 12, 2010
Individual NPDES Stormwater Permit Renewal Transmittal Cover Page
To: Wilmington Regional Office, Linda Willis
Subject: NPDES Stormwater Permit No. NCS00003
Elementis Chromium I
Castle Hayne, NC (New Hanover County) FEB 16 2010
I
Attachment Description
-- '-__--
® Staff Report
® Draft Permit
-® -Renewal Application
Please provide comments on the facility, draft permit, and staff report and sign/return
if acceptable.
Return to Brian Lowther at the Central Office by March 12, 2010.
Brian Lowther
Division of Water Quality
Stormwater Permitting Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
Wetlands and Stormwater Branch
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Location: 512 N. Salisbury St. Raleigh, North Carolina 27604
Phone: [phone] FAX: [phone] Customer Service: 1-877-623-6748
Internet: w .ncwaterquality.org
An Equal Opporlur ry 1 Affirmative Action Employer
NorthCarolina
Jl w"ally

STORM DRAIN COMPUTATION SHEET
West Intermediate School for Buncombe County
Bunbombe County, NC
CDC Project No. 10926
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NCS000003
��1n
NC®ENR
North Carolina Department of Environment and Natural Resources
Beverly Eaves Perdue
Governor
Division of Water Quality
Coleen H. Sullins
Director
STAFF REVIEW AND EVALUATION
NPDES Stormwater Permit
Dee Freeman
Secretary
Facility Name:
Elementis Chromium, L.P.
NPDES Permit Number:
NCS000003
Facility Location:
5408 Holly Shelter Road, Castle Hayne, NC (New Hanover County)
Type of Activity:
Inorganic Chemicals
SIC Code:
2819
Receiving Streams:
See Figure 1
River Basin:
Cape Fear River Basin, Sub -basin 03-06-23
Stream Classification:
B; Sw
Proposed Permit Requirements:
See attached draft permit.
Monitoring Data:
See Table I
Response Requested by (Date):
Central Office Staff Contact:
Return to: Brian Lowther, [phone]
Special Issues:
Issue
Rating Scale: 1(easy) to 10 hard
Compliance history
4
Benchmark exceedance
2
Location (TMDL, 'r&E
species, etc
4
Other Challenges:
• Site visit and
Sample points
6
Difficult Rating:
16/40
Description of Onsite Activities:
• 'The acquisition of the chromium chemicals business of US based Occidental Chemical Corporation,
OxyChem in 2002, the former OxyChcm operation at Castle Mayne, North Carolina now becomes Flementis
Chromium's primary US operation producing dichromate and chromic acid to serve the North American
market.
• Elementis Chromium manufactures a range of commodity and speciality chromium products. "These
include chromic acid, chromic oxide, ammonium dichromate, potassium dichromate, sodium dichromate,
chrome sulphate and sodium sulphate. Receive chrome ore from out of the country. They process into
liquid and powder.
Page I of 9

NCS000003
Elementis Chromium is a division of Elementis plc, the international specialty chemicals group
Documents Reviewed:
• NPDES Stormwater Permit Application Materials
• National Heritage Program (NHP) Threatened and Endangered Species Database
• SPU File
• Central Files
• EPA Sector -Specific Permit, 2008
• 303(d) List, 2008 draft, 2006 Final
• 2005 Cape Fear Basinwidc Plan
History:
• August 31, 1994: Date permit first issued (Occidental Chemical Corporation). Monitoring included
annually sampling for Chromium and Nitrate -Nitrite Nitrogen. Nitrate + Nitrite had a cutoff concentration
of 10 mg/l.
• February 19, 1999: Renewal Reminder Letter Sent
• November 12, 1999: Date permit re -issued. Monitoring included Chromium and Nitrate -Nitrite Nitrogen
quarterly during the 4°i year
• May 19, 2004: Date permittee submitted renewal application
• December 14, 2009: Sent perinittee reviewing application letter.
• February 3, 2010: Site visit with Linda Willis (WiRO)
New Owner Contact Dennis Valentine
New Faciliry Contract: Floward Morris
New Permit Contact: Sean Coury- 910-675-7229 and sean.couryeaelementis.cont
Page 2 of 9

NCS000003
NCS000003
Map Scale 1,24,000
r: Map ut
Elementis Chromium, L.P.
Elementis Chromium Castle Hayne Pla
Latitude: 390 22' 19" N
Lon4tude: 770 51' 36" W
County: New Hanover
Recaving Stream: Northeast Cape Fear
Stream class: B; Sw
Sub-basn: 03-06-23 (Cape Fear River Basn)
sue,
11-01
Facility Location
Page 3 of 9

NCS000003
Central Office Review Summary:
1. Owner's Other Permits:
• NC0003875 - Elementis Chromium L P Castle- 1 MGD
CAA 3712900055, NI-144629
2. General Observations:
• 'I RI releases include Chromium Compound, Lend, and Mercury.
• 2 Outtalls — Natural vegetative swales and ditches are used to convey stonnwater to Outfalls 004 and
005.
• Quarry on -site dug by nearby company for building materials.
• Stormwater that falls in process areas of the plant is either collected and used in the process or drained
to an internal storm water system for treatment before being discharged through permitted industrial
discharges. Process areas are designed to contain any stonnwater that falls on them. These designs include
curbed process areas, lined trench systems, paved roadways and areas beneath pipe racks, an internal
stormwater collection system, and grading designed to prevent runoff.
• Materials are stored to prevent leaks and reduce the possibility of runoff to slornmvater discharges.
This includes adequate secondary containment for all product, fuel, and process storage tanks and storing all
containers, drums, and bags in covered warehouses to prevent exposure to the weather.
• Chromium exists in three distinct forms or valency states,metallic, trivalent and hexavalent. The
hazards and practices relating to managing the risk vary depending on the form present. Metallic chromium,
present in chromium -plated objects and alloys such as stainless steels, is essentially inert. Trivalent
compounds occur naturally in the environment in mineral ores, are the most stable and are not classified as
hazardous. Commercial uses include pigments, refractories and leather tanning.
• Notes show they want to change fuel source. Currently use fuel oil and chrome ore to heat furnace.
They want to change to coal. So they will have to store coal on -site. From the site visit we learned they have
no current plans for coal because the price of fuel oil went down. They Understand that their SPPP plan
must include coal piles if they do store coal. WiRO Nov 2006: Inspection. No objections to coal storage.
"["here is a rail spur on property that the coal will be stored near. They used coal in the early 90s. The is a
concrete pad and conveyor belt in place. Drains to detention pond and discharges with stormwater (from
BG notes 5/30/08 Michelle Mayfield URS Corp. [phone].)
• From littp://www.clernentiscliromium.comAise/benefits.litm
FIcxavalent chromium compounds do have recognized hazards and are regulated accordingly. They occur in
the primary manufacturing process and are used in some downstream process industries, such as chromium
plating. Elementis Chromium works to manage these hazards responsibly during manufacture and for the
purposes of' distribution.
• Our chromium chemicals can be found in a wide range of everyday items:
o plumbing fixtures, car accessories and domestic appliances such as kettles and toasters are chrome
plated
o ingredient of products applied to protect timber used to build bridges, utility poles, marine piles and
many other industrial applications.
o super -alloys used in aircraft engines and land based turbines contain
o chromium metal made from chromic oxide. In addition chromic oxide is used in applications to
colour ceramics, surface coatings, cosmetics, plastics and construction products
o chrome sulphate tans leather used to make clothing and shoes
o sodium sulphate is an ingredient in washing powders
3. hnpainnent: The Northeast Cape Fear River is on the 2006 303(d) list for a Mercury Fish Advisory and the
Northeast Cape Fear River (18-74-(25.5)) is on the 2008 draft 3003d list for impaired ecological/biological
integrity. The 2010 draft 303d list does not include the Northeast Cape Fear River 18-74-(47.5). "file 2005
Basinwide Plan recommendations putting the Northeast Cape Fear River on the 303d list for the fish
consumption category. The river from NC210 to Ness Creek is not rated for aquatic life because dissolved
Page 4 of 9

I�NIYIIIIIDIIICI
oxygen was below 41ng/t in 23 and 10 percent of samples. The Northeast Cape Pear River is classified as B; Sw,
which acknowledges natural characteristics of swamps such as low dissolved oxygen.
4. Threatened and Endanacred: Based on the Natural Heritage virtual workroom there are no federal protected
aquatic species within two miles of the facility. The only endangered species the Picoides borealis (Red -
cockaded Woodpecker).
5. Location: B; Sw
6. Industrial Changes Since Previous Permit: Changes included with the application included:
Quarry Stonnwater Management improvements- The elevation of the dike around Quarry
Section #2 was increased. The project was issued a Stonnwater Project Permit No. SW8970922
Modification.
2. Elimination of Outfall 003- Outfall 003 was an outfall from rinsing dust and dirt from
employees' vehicles. The rinse water is now being collected in a sump and pumped to the
industrial wastewater treatment plant.
7. Analytical Monitorine Notes: There were five samples included in the renewal application from 12/4/02 to
10/25/03 for outfalls 004 and 005. All of the samples were below the current benchmarks. Chromium was
below the detection limit for all of the samples.
Current outfalls are located in swampy areas and are not truly representative of stormwater leaving the site.
Based on the site visit (2/3) another outfall should be added to do the analytical monitoring. The outfall is
located by one of the chromium ore pills and the capped lagoon.
Total Chromium will remain in the permit because of the ore stored onsite. Chromium IV was considered but
since all the stormwater in the process area is collected in the waste water it was not added. It should be
included in their wastewater permit.
This industry (SIC 2819) is covered in the EPA General Multi -Sector Permit under Subsector C2. Industrial
Inorganic Chemicals. The permit recommends monitoring for Total Aluminum, Total Iron, and Nitrate plus
Nitrite Nitrogen. Total Aluminum and Total Iron will not be added into the renewal permit because they are not
a potential pollutant on the site. Nitrate plus Nitrite Nitrogen will be maintained in the permit.
8. Qualitative Monitoring Notes: Visual monitoring was done nine times at both outfalls. Outfall 004 was
clear/brown but showed no signs of pollutants. The color of Outfall 005 looked to have tannins in it and had
some leaves in the discharge.
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NCS00O003
Table 1: Analytical Monitoring
Required
Sampling Range
Sample Date
Total
Flow
(MGD)
Precipitation
(in)
Duration
(hours)
Total
Chromium
Benchmark:
1 mg/L
FBenchmark:
Outfall 004
11/1 /02 to 1/31/03
12/4/2002
0.044
0.11
5.5
<0.005
0.08
2/1/03 to 3/30/03
4/25/2003
0.044
0.11
3.28
<0.005
1.67
5/1/03 to 6130/03
7/19/2003
0.159
0.4
3.63
<0.005
0.39
8/1/03 to 10/31/03
8/23/2003
0.29
0.73
0.53
<0.005
0.45
10/25/20031
0.044
0.11
4.37
<0.005
0.05
Outfall 005
11/1/02 to 1/31/03
12/4/2002
0.076
0.11
5.5
<0.005
0.2
2/1/03 to 3/30/03
4/25/2003
0.076
0.11
3.28
<0.005
1.74
5/1/03 to 6/30/03
7/19/2003
0.276
0.4
3.63
<0.005
0.19
8/1/03to 10/31/03
8/23/2003
0.505
0.73
0.53
<0.005
0.2
10/25/2003
0.076
i 0.11
4.37
<0.005
<0.025
Over Current Benchmark
Data Not Collected
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NCS000003
Revised Permit Recommendations: Analytical Monitoring:
I. Maintain monitoring for total Chromium and Nitrate plus Nitrite Nitrogen. See rational above.
2. pl I has been added to the analytical monitoring requirements.
3. All analytical monitoring has been set to semi-annually during a representative storm event as defined in Part II
Section B. The permittee must also document the total precipitation for each event. If no discharge occurs
during the sampling period, the permittee must submit a monitoring report indicating "No Flow" within 30 days
of the end of the six-month sampling period. Additionally, samples must be taken a minimum of 60 days apart,
as specified in Table 2.
4. Benchmarks for analytical monitoring have been added to this draft permit. Exceedances of benchmark values
require the permittee to increase monitoring, increase management actions, increase record keeping, and/or
install stormwater Best Management Practices (BMPs) in a tiered program. If the sampling results are above a
benchmark value, or outside of the benchmark range, for any parameter at any outfall then the facility shall
follow the Tier 1 guidelines which require a facility inspection within two weeks and implementation of a
mitigation plan within two months. If during the term of this permit, the sampling results are above the
benchmark values, or outside of the benchmark range, for any specific parameter at a specific discharge outfall
two times in a row (consecutive), then the facility shall follow the Tier 2 guidelines which require a repetition of
the steps listed for Tier 1 and also immediately institute monthly monitoring for all parameters at every outfall
where a sampling result exceeded the benchmark value for two consecutive samples.
5. The permittee is required to collect all of the analytical and qualitative monitoring samples during representative
storm events as defined in Part II Section B. Qualitative monitoring is required regardless of representative
outfall status.
6. The permittee is responsible for all monitoring until the renewal permit is issued. See Footnote 1 of Tables 1, 4,
and 5.
7. The flow reporting requirement has been removed per DWQ revised strategy. (The total rainfall parameter is in
this permit, however.)
8. Vehicle maintenance monitoring has been revised to semi-annually in order to coincide with analytical and
qualitative monitoring.
Other Proposed Changes to the Previous Permit:
1. Additional guidance is provided about the Site Plan requirements. The site map must now identify if the
receiving stream is impaired and if it has a TMDL established. It must also describe potential pollutants in each
outfall. The map requirements arc stated more explicitly. And, the site plan must contain a list of significant
spills that have occurred in the past three years and also must certify that the outfalls have been inspected to
ensure that they do not contain non-stormwater discharges. Additional information is provided in Part II Section
A.
2. Additional requirements for the Slormwater Management Plan have been specified in Part II Section A. More
details regarding secondary containment are provided.
3. Additional requirements f'or the Slonmwater Pollution Prevention Plan have been specified in Part 11 Section A.
The plan must also be updated annually to include a list of significant spills and to certify that the outfalls do not
contain non-stormwater discharges.
4. The facility must now implement a semi-annual Facility Inspection Program of the site's stormwater
management controls as specified in Part II Section A.
5. Information regarding the No Exposure Exclusion has been added to this draft permit. If industrial materials and
activities are not exposed to precipitation or runoff as described in 40 CFR § 122.26(g), the facility may qualify
for a No Exposure Exclusion from NPDES stormwater discharge permit requirements. Additional information
is provided in Part I Section A.
Page 7 of 9

NCS000003
Site Visit on February 3, 2010 with Linda Willis (WiRO), Brian Lowther (CO) and Sean Coury [phone]
Sean Coury showed us the two outfalls, the Cape Fear River, and some of the industrial activities onsitc. We walked
the perimeter of the site. As the application stated, almost all of the stormwater in the production area is collected
and goes to their wastewater outfall. Outfalls 004 and 005 were both located in swampy areas. Another potential
outfall was located on the site near one of the chromium ore piles and the capped lagoon. We recommended he add
that outfall for analytical monitoring and stop sampling 004 and 005 because they are commingled in the swamp
water.
Page 8 of 9

IYwI.YIIII1111►N
Recommendations: Based on the documents reviewed, the application information submitted on May 19, 2004
sufficient to issue an Individual Stormwater Permit.
Prepared by (Signature) �— �- Date z 9 0
Stormwater Permitting Unit Supervisor £,% Date
for Bradley Bennett
77.
Concurrence by Regional Officeefi l� Lt1CQ! LJ Date O/ -2U/U
RO Water Quality Supervisor 1 c -IZ— 01 Date (1p--?, , O 1 , I D
Regional Office Staff Comments (attach additional pages as necessary')`
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Page 9 of 9