NCS000304_Renewal Application_20210621

i
KL EINFEL OER
Bright People. Right Solutions.
June 16, 2021
Kleinfelder File No. CLT21 L126930
Ms. Suzanne McCoy
DEMLR — Stormwater Program
Individual Permit Renewal
1612 Mail Service Center
Raleigh, NC 27699-1612
REC i V ED
JUN 212021
DENR-LAND QUA' ITY
STQRMWATER PERMITTING
SUBJECT: Individual NPDES Stormwater Permit Renewal
Gerdau Long Steel North America - Charlotte Steel Mill
Charlotte, North Carolina
Kleinfelder Project: 20220184.001A
Dear Ms. McCoy
On behalf of Gerdau Ameristeel US, Inc. (Gerdau), Kleinfelder is submitting the enclosed National
Pollutant Discharge Elimination System (NPDES) Individual Stormwater Permit Renewal
application.
The Gerdau facility currently operates under NPDES Permit No. NCS000304, issued by the North
Carolina Department of Environmental Quality (NCDEQ), Division of Water Quality. The current
permit will expire on October 31, 2021.
The NPDES permit renewal application package includes the following
• NCDEQ Application Forms.
o Renewal Application Form.
o Stormwater Pollution Prevention Plan Development and Implementation
Certification form.
o Supplemental Information form.
• Current site map from the Stormwater Pollution Prevention Plan (One Plan).
• A summary of analytical monitoring results during the term of the existing permit.
• A summary of visual monitoring results during the term of the existing permit.
• A summary of Best Management Practices utilized at the facility.
• A description of significant changes in industrial activities at the facility.
20220184.001A I CLT21 L126930 Page 1 of 2 June 16, 2021
© 2021 Kleinfelder www.kleinfelder.com
KLEINFELDER 9009 Perimeter Woods Drive, Suite E, Charlotte, NC 28216 p 1704.598.1049

If you have any questions, please contact Mr. Mitch Fralick of Gerdau at
Mitchell. Fralick(cDgerdau.com or the undersigned.
Sincerely,
KLEINFELDER, INC.
Thomas Sipe, PE
Project Professional
tsipe(c)-kleinfelder.com
Christine K. Brenk, CHMM
Senior Principal Professional
cbrenk(a.kleinfelder.com
TS/CKB:asp
Attachments: A — NCDEQ Forms
B — Site Map
C — Analytical Results Summary
D — Visual Monitoring Results Summary
E — Summary of Best Management Practices
F — Description of Industrial Changes
20220184.001A I CLT21 L126930 Page 2 of 2 June 16, 2021
© 2021 Kleinfelder www.kleinfelder.com

ATTACHMENT A
NCDEQ FORMS
20220184.001A I CLT21L126930 June 16, 2021
© 2021 Kleinfelder www.kleinfelder.com

Permit Coverage
K"r'o. Renewal Application Form —
ES
National Pollutant Discharge Elimination System NP INC Permit Number
Environmental
Stormwater Individual Permit NS 000aoa
Quality
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:
Gerdau Amedsleal Corporation
Owner Contact:
Mr. Rodrigo Can —
Mailing Address:
PO Bax481980
Charlotte, NC 26269
Phone Number:
Fax Number:
E-mail address:
Facility Information
Facility Name:
GaNau Amodstael US, inn.-Ch.fths Mill
Facility Physical Address:
6601 Lakeview Rd
Charlotte, NC 28269
Facility Contact:
Mr. Mitchell Frallck
Mailing Address:
PO Box481980
Charlotte, NO 28269
Phone Number:
704-55IM361 x3035
Fax Number:
E-mail address:
mitchell.frallckggerdau.com
Permit Information
Permit Contact:
Mr. Mitchell Frallck
Mailing Address:
PO Box 481980
Chadotte, NC 28269
Phone Number:
704-596-0361 x3035
Fax Number:
E-mail address:
milchelLfralick®gardau.com
Discharge Information
Receiving Stream:
Long Creek
Stream Class:
C
Basin:
Catawba River Basin
Sub -Basin:
03-06.34
Number of Outfalis:
4
Facility/Activity Changes Please describe below any changes to your facility or activities since issuance of your permit. Attached a
separate sheet if necessary.
Notapplicable. There have been no changes that significantly impact the quantity, or pollulsnl concentration levels otstormwater discharges.
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, co fete and accurate,
Signature Date �/ ��,I a 1
Mitchell Frallck Environmental, Health, and Safety Manager
Print or type name of person signing above Title
DEMLR - Stormwater Program
Please return this completed application form Dept, of Environmental Quality
and requested supplemental information to: 1612 Mail Service Center
Raleigh, North Carolina 27699-1612

North Carolina Division of Energy, Mineral, and Land Resources — Stormwater Program
Facility Name:
Permit Number:
Location Address:
Gerdau Amerlateel US, Inc - Charlotte MIA
NCS000304
6601 Lakevlew Rd
Chadolle, NC 28269
County:
Mecklenburg
"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,"
Signature
Nfthell FWI.k
Print or type name of person signing above
Date WzmZ 1
Environmental, Health, and Safety Manager
Title
SPPP Certification 10/13

SUPPLEMENTAL INFORMATION REQUIRED FOR RENEWAL OF INDIVIDUAL
NPDES STORMWATER PERMIT
Two copies of each of the following shall accompany this submittal in order for the application
to be considered complete:
(Do not submit the site Stormwater Pollution Prevention Plan)
Initials
M 1. A current Site Map from the Stormwater Pollution Prevention Plan. The location of
industrial activities (including storage of materials, disposal areas, process areas and
loading and unloading areas), drainage structures, drainage areas for each outfall,
building locations and impervious surfaces should be clearly noted.
2. A summary of Analytical Monitoring results during the term of the existing permit
(if your permit required analytical sampling). Do not submit individual lab reports.
The summary can consist of a table including such items as outfall number,
parameters sampled, lab results, date sampled, and storm event data.
3. A summary of the Visual Monitoring results. Do not submit individual monitoring
reports. The summary can consist of a table including such items as outfall number,
r parameters surveyed, observations, and date monitoring conducted.
M r 4. A summary of the Best Management Practices utilized at the permitted facility.
Summary should consist of a short narrative description of each BMP's in place at
the facility. If the implementation of any BMP's is planned, please include
M ( information on these BMP's.
1 t" 5. A short narrative describing any significant changes in industrial activities at the
permitted facility. Significant changes could include the addition or deletion of
work processes, changes in material handling practices, changes in material storage
practices, and/or changes in the raw materials used by the facility.
Hrr
t� 6. Certification of the development and implementation of a Stormwater Pollution
Prevention Plan for the permitted facility (Sign and return attached form).
If the final year analytical monitoring of the existing permit term has not been completed
prior to filing the renewal submittal, then the last years monitoring results should be submitted
within 30 days of receipt of the laboratory reports. (i.e. do not withhold renewal submittal
waiting on lab results)

ATTACHMENT B
SITE MAP
20220184.001A I CLT21L126930 June 16, 2021
© 2021 Kleinfelder www.kleinfelder.com

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ATTACI IMENT C
ANALYTICAL RESULTS SUMMARY
20220184.001A I CLT21L126930 June 16, 2021
© 2021 Kleinfelder www.kleinfelder.com

Gerdau Long Steel North America
NPDES Stormwater Permit Renewal
Analytical Monitoring Summary
Date
mg/L
6/7/2019
10/16/2019
4/20/2020
12/14/2021
5/3/2021
Wet Chemistry
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
Total Suspended Solids
100
26
8.5
43.2
50.4
203
BOD Total
30
3.5
12.5
2.5
16.8
6.3
COD Total
120
53.1
<25
25.2
<25
<25
Oil and Grease
Oil and Grease
15
<5
<5.0
<5.0
<5.0
<5.0
Metals
Aluminum
0.75
0.289
0.165
0.56
0.967
0.416
Boron
Cadmium
0.003
<.001
<.001
<.001
<.001
<.001
Chromium
1
<.005
<.005
<.005
0.0103
0.009
Copper
0.01
0.0072
<.005
<.005
<.005
<.005
Lead
0.075
0.0058
<.005
<.005
<.005
0.0068
Nickel
0.26
<.005
<.005
<.005
<.005
<.005
Zinc
0.126
0.0397
<.01
0.0187
0.0353
0.0394
Ph 1
6-9 1
6.4 1
7.7 1
7.2
7.1 1
7.4
* Samples collected at Outfall 4.

ATTACHMENT D
VISUAL MONITORING RESULTS SUMMARY
20220184.001A I CLT21L126930 June 16, 2021
© 2021 Kleinfelder www.kleinfelder.com

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ATTACHMENT E
SUMMARY OF BEST MANAGEMENT PRACTICES
20220184.001A I CLT21L126930 June 16, 2021
© 2021 Kleinfelder www.kleinfelder.com

Gerdau Long Steel North America
NPDES Stormwater Permit Renewal
Best Management Practices (BMPs)
BMP
Frequency
Location
Description
Scrap yard
Perform inspections of areas looking for materials on the ground or
other surface exposed to stormwater. Spot check contents of
Inspections
Monthly
Alloy Storage
dumpsters looking for free liquids and oily materials. Expeditiously
contain and cleanup spills of substances posing a substantial risk of
Carbon and Lime Storage Silos
pollution to stormwater runoff. Remove liquids and oily materials
Waste Dumpsters
from dumpsters promptly. Inspections are documented.
Perform daily sweeping of high traffic paved areas
Perform weekly sweeping of all paved areas
Sweeping/
Daily and Weekly
All paved surfaces
Perform weekly washing of high traffic areas
Washing
Activities are documented in logs.
Perform daily cleaning of baghouse dust loading building. This part of
Cleaning
Daily
Baghouse dust loading area
the standard daily routine for this area and is not specifically
documented.
Drummed
Upon receipt of
Water treatment chemicals
Perform inspections of containers upon arrival at facility. Promptly
Material Storage
materials
move materials to appropriate storage areas where shelter and berms
Other liquids received in drums
and totes
are provided. Documentation not required.
Refractory
Maintain materials within bermed areas to minimize impact to
stormwater. Maintain minimum of 10 foot setback from edge of bank
Mill scale
Bulk Material
Daily
of ditches and where possible maintain vegetative cover in buffer
Storage
zone. Inspect areas to ensure materials are stored as described and
berms and setback areas are maintained. This part of the standard
Slag
daily routine for this area and is not specifically documented.
Equipment
Daily
Locomotives
Perform inspections and maintenance. This is part of the standard
Fork
Maintenance
trucks
daily routine for this area and is not specifically documented.
Other mobile equipment
Use inserts to help filter Al runoff from turnings pile. Inspect insert
Scrap Yard Storm
Drain in Scrap Yard Southwest of
quarterly and replace as needed. This is in response to high Al
Water Drain
Quarterly
Turning Pile on Concrete Pad
concentrations seen in Oct 2018 west outfall sample. Investigation
showed almost 3x benchmark value in water in the storm drain by the
turnings pile. This PM is done by Central Maintenance.

Description of Significant Industrial Changes
During the term of the existing stormwater permit, the Gerdau Long Steel North America facility
has not implemented significant changes in industrial activities that affect stormwater
discharges. Within the next three years, Gerdau is considering a project for constructing a
concrete truck staging area over a portion of a closed/capped landfill located at the site. Since
the existing landfill is capped with impervious material, this proposed project is not expected to
create a significant quantity of additional stormwater run-off. As part of the engineering review
and design of the project, an analysis of stormwater volumes and containment requirements will
be conducted.