NCS000304_MONITORING INFO_20181116

STORMWATER DIVISION CODING SHEET
PERMIT NO.
Ce; OOD �bOLI
DOC TYPE
❑FINAL PERMIT
MONITORING INFO
❑ APPLICATION
❑ COMPLIANCE
❑ OTHER
DOC DATE
❑ Zz(Q 1l I �p
YYYYMMDD

STORMWATER DISCHARGE OUTFALL (SDO)
MONITORING REPORT
Permit Number NCS 000304 ^�I` V fED
FACILITY NAME Gerdau Ameristeel US INC- Charlotte L
PERSON COLLECTING SAMPLE(S) Jill Gee CIE
CERTIFIED LABORATORY(S) Pace Analytical_ _ D 12
Lab #
Part A: Specific Monitoring Requirements
SAMPLES COLLECTED DURING CALENDAR YEAR:
(This monitoring report shall be received by the Division no later than 30 days from
the date the facility receives the sampling results from the laboratory.)
COUNTY Mecklenburg
PHONE NO. ( 704 ) 596-0361
SIGNATURE OF PERMITTEE OR DESIGNEE
REQUIRED ON PAGE 2.
Outfall
Date
No.
_
Sample
Collected
Total
Rainfall
Oil & '
Grease:.
Total
Suspende
d Solid
TSS__(Al)
pH
Total
Copper
(Cu)
Total
Lead
(Ph)
Total
Nickel
(Ni)
Total
Zinc
(Zn)
Total
Alumin
um
Total
Cadmium
(Cd)
Total
Chromium
(Cr)
BOD
COD
mo/dd/ r
inches
M L
M L
Unit
L
L
L
L
L
L
AgIL
M
M L
WEST
10/10/18
4.9
<4.8
30.6
7.1
<5.0
<5.0
<5.0
10.2
1090.0
<1.0
<5.0
3.0
<25.0
NORTH
SOUTHEAST
SOUTH
Does this facility perform Vehicle Maintenance Activities using more than 55 gallons of new motor oil per month? _yes X_no
(if yes, complete Part B)
Part B: Vehicle Maintenance Activity Monitoring Requirements
Outfall
No.
Date
Sample
Collected
50050
00556
00530
00400
Total; Flow
.(if applicable)
Total
Rainfall
Oil & Grease
(if appl.)
Non -polar
O&G/TPH
(Method 1664
SGT-HEM), if
appi.
Total
Suspended
Solids
pH
New Motor
Oil Usage
mo/dd/ r
MG
inches
m
m
unit
sumo
Form SWU-247, last revised 21212012
Page 1 of 2

STORM EVENT CHARACTERISTICS:
Date _10/10/18
Total Event Precipitation (inches): 4.9
Event Duration (hours): (only if applicable — see permit.)
(if more than one storm event was sampled)
Date '
Total Event Precipitation (inches):
Event Duration (hours): (only if applicable — see permit.)
Mail Original and one copy to:
Division of Water Quality,
Attn: Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
"I certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a
system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person
or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the
best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information,
including the possibility of fines and imprisonment for knowing violations."
of Permittee)
/0
(Date)
Form SWU-247, last revised 21212012
Page 2 of 2

m GERDAU
October 26, 2018
Division of Water Quality
Attn: Central Files
1617 Mail Service Center
Raleigh, NC 27699-1617
RE: DMR's for Storm Water Permit NCS000304
Permitted Facility: Gerdau Ameristeel, US Inc- Charlotte Mill
To Whom It May Concern:
Please find enclosed signed copies of the Discharge Monitoring Report from the Gerdau Ameristeel US,
Inc. - Charlotte Steel Mil for Q3 (September - November) of 2018. Our results show that we have
exceeded our benchmark value for Aluminum. We are currently working through the Tier I process.
Please let us know if you need any additional information.
Sincerely,
W.
obert Churchill
Safety, Health and Environmental Manager
Gerdau — Charlotte Steel Mill
6601 Lakeview Road
Charlotte, NC 28269
[phone], ext. 3128

GERDAU
November 12, 2018
Division of Water Quality
Attn: Central Files
1617 Mail Service Center
Raleigh, NC 27699-1617
RE: DMR's for Storm Water Permit NCS000304
Permitted Facility: Gerdau Ameristeel, US Inc- Charlotte Mill
To Whom It May Concern:
RECEI ED
NOV 2 9 2018
CENTi�AL FILES
DWR SECTION
Please find enclosed signed copies of the updated Discharge Monitoring Report from the Gerdau
Ameristeel US, Inc. - Charlotte Steel Mil for Q3 (September - November) of 2018. Our original submission
of our Q3 DMR showed that we exceeded our benchmark value for aluminum. We asked our lab to re -run
the sample to ensure the accuracy of the results originally reported. The re -run showed that the lab did
have an error and our aluminum results are now reported to be 740 ug/L. We are sending a copy of the
updated lab report with this DMR.
In response to our aluminum concentrations being higher than we are accustomed to seeing, we
launched an investigation. The investigation found that, due to a change in storage practices in our scrap
yard, one of our grades of scrap metal is now being stored closer to a. storm drain than it had been in
previous months. We have added a mesh screen to the drain to prevent high concentrations of metals
from getting into our storm water. We will continue to monitor our storm water sample results closely.
Please let us know if you need any additional information.
Sincerely,
)' 64-4�1
'v
Robert Churchill
Safety, Health and Environmental Manager
Gerdau — Charlotte Steel Mill
6601 Lakeview Road
Charlotte, NC 28269
[phone], ext. 3128

STORMWATER DISCHARGE OUTFALL (SDO)
MONITORING REPORT
Permit Number NCS 000304
FACILITY NAME _ Gerdau _Ameristeel US, INC- _Charlotte
PERSON COLLECTING SAMPLE(S) Jill Gee W
CERTIFIED LABORATORY(S) _ Pace Analytical _ Lab # 12
Lab #
Part A: Specific Monitoring Requirements
SAMPLES COLLECTED DURING CALENDAR YEAR:
(This monitoring report shall be received by the Division no later than 30 days fcom
the date the facility receives the sampling results from the laboratory.)
COUNTY Mecklenburg _
PHONE NO. 704 596-0361
SIGNATURE OF PERMITTEE OR DESIGNEE
REQUIRED ON PAGE 2.
Outfall " .
No.
Date
Sample
Collected
Total
Rainfall
Oil &
Grease
- =
Total _
Su`spende
d Solid :
TS5
pH
Total
Copper
(Cu}
Total _ `
Lead
(Pb)
Total'
Nickel
(Ni)
-
Total
Zinc
(Zn)
Total
-Alumin
um
(Al).
Total
Cadmium
(Cd)
Total
Chromium -
(Cr)
BOD .
COD
moldd/ r
inches
M L
Mg&
Unit
L
L
L
MgIL
M
WEST
10/10/18
4.9
<4.8
30.6
7.1
<5.0
<5.0
<5.0
10.2
740.0
<1.0
<5.0
3.0
<25.0
NORTH
SOUTHEAST
SOUTH
Does this facility perform Vehicle Maintenance Activities using more than 55 gallons of new motor oil per month?_ yes X_no
(if yes, complete Part B)
Part B: Vehicle Maintenance Acti ity MonitoringRe uirements
Outfall
No.
Date
Sample
:Collected
_
50050
00556
00530- .
00400
Total Flow
(if applicable)
Total..
;Rainfall
Oil & Grease
_(if appl.)
-
Non' -polar
O&G/TPH
(Method'1664
SGT-HEM), if
appl.
Total
Suspended
Solids
pH
_-
New Motor
Oil Usage
moldd/ r.
MG
inches
m /l
1
unit
al/mo
Form SWU-247, last revised 21212012
Page 1 of 2

STORM EVENT CHARACTERISTICS:
Date _10/10/18
Total Event Precipitation (inches): 4.9
Event Duration (hours): (only if applicable — see permit.)
(if more than one storm event was sampled)
Date
Total Event Precipitation (inches):
Event Duration (hours): (only if applicable see permit.)
Mail Original and one copy to:
Division of Water Quality
Attn: Central Fifes
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
"I certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a
system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person
or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the
best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information,
including the possibility of fines and imprisonment for knowing violations."
(Signature of Permittee)
(Date)
Form SWU-247, last revised 21212012
Page 2 of 2

STORMWATER DISCHARGE OUTFALL (SOO)
MONITORING REPORT
Permit Number NCS 000304
FACILITY NAME Gerdau Ameristeel US, INC- Charlotte
PERSON COLLECTING SAMPLE(S) ,Till Gee
CERTIFIED LABORATORY(S) Pace Analytical Lab # 12
Lab #
Part A: Specific Monitoring Requirements
SAMPLES COLLECTED DURING CALENDAR YEAR:
(This monitoring report shall be received by the Division no later than 30 days from
the date the facility receives the sampling results from the laboratory.)
COUNTY Mecklenburg
PHONE NO. 704 596-0361
SIGNATURE OF PERMITTEE OR DESIGNEE
REQUIRED ON PAGE 2.
Outfall
Date':
-
No.
Sample v
Collected
Total
Rainfall
Oil &
Grease
Total
Suspende .
d Solid
TSS
pH'
`
_Total
Copper
(Cu)
Total,
Lead'- '
(Pb);
;Total
-Nickel
(Ni)
Total
Zinc
(Zn) :
"Total
Alumin
•um•:
Al
Total
Cadmium
(Cd)
Total
Chromium
;(Cr)°
BOD
COD
uio/ddI r
inches
M L
M L-
Unit `.
L
L_
M
M
WEST
10/10/18
4.9
<4.8
30.6
7.1
<5.0
<5.0
<5.0
10.2
740.0
<1.0
<5.0
3.0
<25.0
NORTH
SOUTHEAST
SOUTH
Does this facility perform Vehicle Maintenance Activities using more than 55 gallons of new motor oil per month? _yes X no
(if yes, complete Part B)
Part B: Vehicle Maintenance Activity Monitoring Requirements
OutfalC
No.
Date
_Sample
Collected'
50050
00556
00530
00400
Total Flow.
(if applicable)
Total
Rainfall';
Oil & Grease
(if appl.)
Non -polar
O&G/TPH
"(Method 1664
SGT-HEM_ ), if
appl.,
Total,;
Suspended
Solids
pH
New Motor
oil Usage
mo/dd/ r
MG
inches
.mg/h.
m
unit -
al/mo
Form SWU-247, last revised 21212012
Pagel of 2

STORM EVENT CHARACTERISTICS:
Date _10/10/18
Total Event Precipitation (inches): 4.9
Event Duration (hours): (only if applicable — see permit.)
(if more than one storm event was sampled)
Date
Total Event Precipitation (inches):
Event Duration (hours): (only if applicable — see permit.)
Mail Original and one copy to:
Division of Water Quality
Attn: Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
"I certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a
system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person
or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the
best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information,
including the possibility of fines and imprisonment for knowing violations."
(Signature of Permittee)
(Date)
Form SWU-247, last revised 21212012
Page 2 of 2

L�
ce .Analytical"
www,pncobabs.com
October 26, 2018
Bob Churchill
Gerdau AmeriSteel
PO Box 481980
Hambleton, WV 26269
RE: Project: Sampling 10/10/18
Pace Project No.: 92402981
Dear Bob Churchill:
Pace Analytical Services, LLC
9800 Kinsey Ave. Suite 100
Huntersville, NC 2807E
[phone]
Enclosed are the analytical results for sample(s) received by the laboratory on October 10, 2018,
The results relate only to the samples included in this report. Results reported herein conform to the
most current, applicable TNIINELAC standards and the laboratory's Quality Assurance Manual,
where applicable, unless otherwise noted in the body of the report.
A revised report is being submitted on 10/26/18 to include reanalysis results for Al.
If you have any questions concerning this report, please feel free to contact me.
Sincerely,
o-qyJ,
Angela Baioni
[e-mail]
[phone]
Project Manager
Enclosures
cc: Jill Gee, GerdauAmeriSieel
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC,
Page 1 of 15

aceAnalytical o
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CERTIFICATIONS
Project: Sampling 10/10/18
Pace Project No.: 92402981
Pace Analytical Service.„LLC
9800 Kincey Ave. Suite 100
Hunteroville, NC 2807B
[phone]
Charlotte Certification IDs
9800 Kincey Ave. Ste 100, Huntersvi Ile. NC 28078
South Carolina Certification #: 99006001
Louisiana/NELAP Certification # LA170028
Florida/NELAP Certification #; E87627
North Carolina Drinking Water Certification #: 37706
Kentucky UST Certification #: 84
North Carolina Field Services Certification* 5342
Virginia/VELAP Certification #: 460221
North Carolina Wastewater Certification #: 12
Asheville Certification IDs
2225 Riverside Drive, Asheville, NC 28804
FloridalNELAP Certification #: E87648
Massachusetts Certification #: M-NC030
North Carolina Drinking Water Certification #: 37712
North Carolina Wastewater Certiflcation #: 40
South Carolina Certification #: 99030001
Virginia/VELAP Certification #: 460222
REPORT OF LABORATORY ANALYSIS
This report shaft not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC. Page 2 of 15

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SAMPLE ANALYTE COUNT
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
(704)B75-9092
Project: Sampling 10/10/18
Pace Project No.: 92402981
Analytes
Lab lD Sample ID Method Analysts Reported Laboratory
92402981001 W-01102/03/04105 EPA 1664B
JMS
1
PASI-C
EPA 200.7 Rev 4.4 1994
SH1
1
PASI-A
SM 25400-2011
MVC
1
PASI-A
SM 521OB-2011
SMK
1
PASI-A
EPA 9040C
SMK
1
PASI-A
SM 522OD-2011
MDW
1
PASI-A
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
withoat the written consent of Pace Analytical Services, LLC, Page 3 of 15

Iac
(
eAnalydcal'
www.pacafeba.cam
ANALYTICAL RESULTS
Project: Sampling 10/10/18
Pace Project No.: 92402981
Pace Analytical Services, J-LC
9800 ICncey Ave. Suite 100
Huntersville, NC 28078
[phone]
Sample: W-01/02103104105 Lab ID: 92402981001 Collected: 10/10/18 08:00 Received: 10/10/18 16:30 Matrix: Water
Parameters Results Units Report Limit DF Prepared Analyzed CAS No. Qua[
HEM, Oil and Grease
Analytical Method: EPA 1664B
Oil and Grease
ND mg1L
4.6
1
10/19/18 05:11
200.7 MET ICP
Analytical Method: EPA 200.7 Rev 4.4 1994 Preparation Method: EPA 200.7 Rev 4.4 1994
Aluminum
740 ug/L
100
1
10/11/1800:35 10126/1811:49 7429-90-5
2540D Total Suspended Solids
Analytical Method: SM 254OD-2011
Total Suspended Solids
30.6 mglL
5.3
1
10/12/18 17:15
5210E SOD, 5 day
Analytical Method: SM 521OB-2011
BOD, 5 day
3.0 mg1L
2.0
1
10/11/1813:40 10/16/18 10:37 B2,B3,
L2
9040 pH
Analytical Method: EPA 9040C
pH at 25 Degrees C
7.1 Std. Units
0.10
1
10/22/18 13:05
5220D COD
Analytical Method: SM 5220D-2011
Preparation Method: SM 5220D-2011
Chemical Oxygen Demand
ND mg1L
25.0
1
10/11/18 16:49 10/11/18 19:54
Date: 10/26/2018 04:33 PM
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.
Page 4 of 15

aceA, nalytical'
wnwpaooWftoom
Project: Sampling 10110/18
Pace Project No.: 92402981
QC Batch: 437141
QC Batch Method: EPA 1664B
Associated Lab Samples: 92402981001
METHOD BLANK: 2404569
Associated Lab Samples: 92402981001
Parameter Units
Oil and Grease mg1L
QUALITY CONTROL DATA
Analysis Method: EPA 1654B
Analysis Description: 1664 HEM, Oil and Grease
Matrix: Water
Blank Reporting
Result Limit Analyzed Qualifiers
ND 4.8 10/19/18 05:06
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
LABORATORY CONTROL SAMPLE:
2404570
Spike LCS
LCS
% Rec
Parameter
Units
Conc. Result
% Rec
Limits
Qualifiers
Oil and Grease
mg/L
38.5 36.7
96
78-114
MATRIX SPIKE SAMPLE:
2404571
35423433001 Spike
MS
MS
% Rec
Parameter
Units
Result Conc.
Result
% Rec
Limits Qualifiers
Oil and Grease
mg1L
5.2 38.5
41.4
94 78-114
Results presented on this page are In the units Indicated by the "Units" column except where an alternate unit Is presented to the right of the result,
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
Date: 10I2612018 04:33 PM without the written consent of Pace Analytical Services, LLC. Page 5 of 15

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Project: Sampling 10/10/18
Pace Project No.: 92402981
QC Batch: 435623
QC Batch Method: EPA200.7 Rev 4.4 1994
Associated Lab Samples: 92402981001
METHOD BLANK: 2397550
Associated Lab Samples: 92402981001
Parameter Units
Aluminum ug/L
LABORATORY CONTROL SAMPLE: 2397551
Parameter Units
Aluminum ug/L
Pace Analytical Services, I.LC
9800 Kincey Ave. Suite 100
Hunterwiile, NC 28078
[phone]
QUALITY CONTROL DATA
Analysis Method: EPA200.7 Rev 4.4 1994
Analysis Description: 200.7 MET
Matrix: Water
Blank Reporting
Result Limit Analyzed Qualifiers
ND 100 10/12/18 00:25
Spike LCS LCS % Rec
Cone. Result % Rec Limits Qualifiers
5000 5200 104 85-115
MATRIX SPIKE & MATRIX SPIKE DUPLICATE: 2397552 2397553
MS MSD
92402615001 Spike Spike MS MSD MS MSD % Rec
Parameter Units Result Cone, Cone. Result Result % Rec % Rec Limits RPD Qual
Aluminum ug/L 6D9 5000 5000 6970 6560 127 119 70-130 6
MATRIX SPIKE & MATRIX SPIKE DUPLICATE: 2397554 2397555
MS MSD
92402880002 Spike Spike MS MSD MS MSD % Roc
Parameter Units Result Conc, Cone, Result Result % Rec % Rec Limits RPD Qua]
Aluminum ug/L 105 5000 5000 5610 5730 110 112 70-130 2
Results presentee on this page are In the unite indicated by the "Units" column except where an alternate unit Is presented to the right of the result,
REPORT OF LABORATORY ANALYSIS
This report shO not be reproduced, except in full,
Date: 10/26/2018 04:33 PM without the written consent of Pace Analytical Services, LLC. Page 6 of 15

aceA, nalytical
www.pacefabacom
Project: Sampling 10/10/18
Pace Project No.: 92402981
QC Batch: 436051
QC Batch Method: SM 254OD-2011
Associated Lab Samples: 92402981001
METHOD BLANK: 2399618
Associated Lab Samples: 92402981001
Parameter
Units
Total Suspended Solids
mg/L
LABORATORY CONTROL SAMPLE: 2399619
Parameter
Units
Total Suspended Solids
mg/L
SAMPLE DUPLICATE: 2399620
Parameter
Units
Total Suspended Solids
mg/L
SAMPLE DUPLICATE: 2399621
Parameter
Units
Total Suspended Solids
mg/L
QUALITY CONTROL DATA
Analysis Method: SM 254OD-2011
Analysis Description: 2540D Total Suspended Solids
Matrix: Water
Blank Reporting
Result Limit Analyzed Qualifiers
ND 2.5 10/12/1817:11
Spike LCS
Cone. Result
250 230
92403213002 Dup
Result Result
426 579
92402980001 Dup
Result Result
ND ND
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
LCS % Rec
% Rec Limits Qualifiers
92 90-110
RPD Qualifiers
30 D6
RPD Qualifiers
Results presented on this page are In the units indicated by the "Units" column except where an alternate unit Is presented to the right of the result.
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
Date: 10/26/2018 04:33 PM without the written consent of Pace Analytical Services, LLC. Page 7 of 15

aceAnalyircal"
www.pacafahs.00m
QUALITY CONTROL DATA
Protect: Sampling 10/10/18
Pace Project No.: 92402981
QC Batch: 435686 Analysis Method: SM 521OB-2011
QC Batch Method: SM 521OB-2011 Analysis Description: 5210B BOD, 5 day
Associated Lab Samples: 92402981001
METHOD BLANK: 2397723
Associated Lab Samples: 92402981001
Parameter Units
BOD, 5 day mg1L
LABORATORY CONTROL SAMPLE: 2397724
Parameter Units
BOD, 5 day mglL
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
(704)B75-9092
Matrix: Water
Blank Reporting
Result Limit Analyzed Qualifiers
ND 2.0 10/16/18 10:08 B3
Spike LCS LCS % Rec
Cone. Result % Rec Limits Qualifiers
198 164 83 84.6-115 133, L2
SAMPLE DUPLICATE: 2397725
92402928001 Dup
Parameter Units Result Result
BOD, 5 day mg/L 13100 9720
RPD Qualifiers
29 B3, D6
Results presented on this page are In the unhs indicated by the "Units" column except where an alternate unit Is presented to the right of the result.
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
Date: 10/26/2018 04:33 PM without the written consent of Pace Analytical Services, I.I.C.
Page 8 of 15

aceAnalyiical.
WWW.P bbs.00m
0
QUALITY CONTROL DATA
Project: Sampling 10/10/18
Pace Project No.: 92402981
QC Batch: 437594 Analysis Method: EPA 9040C
QC Batch Method: EPA 9040C Analysis Description: 9040 pH
Associated Lab Samples: 92402981001
SAMPLE DUPLICATE: 2406362
92402981001 Dup
Parameter Units Result Result RPD Qualifiers
pH at 25 Degrees C Std. Units 7.1 7.2 1
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Results presented on this page are In the units Indicated by the "Units" column except where an alternate unit Is presented to the right of the result.
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
Date: 10/26/2018 04:33 PM without the written consent of Pace Analytical Services, LLC.
Page 9 of 15

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tuww.pecalalmoom
Project: Sampling 10110/18
Pace Project No.: 92402981
1
QC Batch: 435801
QC Batch Method: SM 5220D-201i
Associated Lab Samples: 92402981001
METHOD BLANK: 2398495
Associated Lab Samples: 92402981001
Parameter Units
Chemical Oxygen Demand mg/L
LABORATORY CONTROL SAMPLE: 2398496
Parameter Units
Chemical Oxygen Demand mglL
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntereville, NC 28078
[phone]
a
QUALITY CONTROL DATA
Analysis Method: SM 5220D-2011
Analysis Description: 5220D COD
Matrix: Water
Blank Reporting
Result Limit Analyzed Qualifiers
ND 25.0 10/1411819:51
Spike LCS LCS % Rec
Cone. Result % Rec Limits Qualifiers
750 764 102 90-110
MATRIX SPIKE & MATRIX SPIKE DUPLICATE: 2398497 2398498
MS MSD
92402710003 Spike Spike MS MSD MS MSD % Rec
Parameter Units Result Conc. Cone. Result Result % Rec % Rec Limits RPD Qual
Chemical Oxygen Demand mg1L ND 10 10 fit 09.6 970 851 90-110 11 M1,R1
MATRIX SPIKE & MATRIX SPIKE DUPLICATE: 2398499 2398500
MS MSD
92403054001 Spike Spike MS MSD MS MSD % Rec
Parameter Units ' Result Conc. Conc. Result Result % Rec % Rec Limits RPD Qual
Chemical Oxygen Demand mg1L 994 40 40 1020 1020 72 72 90-110 0 M1
Results presented on this page are In the units Indicated by the "Units" column except where an alternate unit Is presented to the right of the result,
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
Date: 10/26/2018 04:33 PM without the written consent of Pace Analytical Services, LLG.
Page 10 of 16

Pace Analytical Services, LLC
" 9800 Kincey Ave. Suite 100
aceAnalyirca! Huntersville, NC 28078
www ahs•ciim [phone]
QUALIFIERS
Project: Sampling 10/10/18
Pace Project No.: 92402981
DEFINITIONS
DF - Dilution Factor, if reported, represents the factor applied to the reported data due to dilution of the sample aliquot.
ND - Not Detected at or above adjusted reporting limit.
TNTC - Too Numerous To Count
J - Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit.
MDL -Adjusted Method Detection Limit.
POL - Practical Ouantitation Limit.
RL - Reporting Limit - The lowest concentration value that meets project requirements for quantitative data with known precision and
bias for a specific analyte in a specific matrix.
S - Surrogate
1,2-Diphenylhydrazine decomposes to and cannot be separated from Azobenzene using Method 8270. The result for each analyte is
a combined concentration.
Consistent with EPA guidelines, unrounded data are displayed and have been used to calculate % recovery and RPD values.
LCS(D) - Laboratory Control Sample (Duplicate)
MS(D) - Matrix Spike (Duplicate)
DUP - Sample Duplicate
RPD - Relative Percent Difference
NC - Not Calculable.
SG - Silica Gel - Clean -Up
U - Indicates the compound was analyzed for, but not detected.
Acid preservation may not be appropriate for 2 Chloroethylvinyl ether.
A separate vial preserved to a pH of 4-5 is recommended in SW846 Chapter 4 for the analysis of Acrolein and Acrylonitrile by EPA
Method 8260.
N-Nitrosodiphenylamine decomposes and cannot be separated from Diphenylamine using Method 8270. The result reported for
each analyte is a combined concentration.
Pace Analytical is TNI accredited. Contact your Pace PM for the current list of accredited analytes.
TNI -The NELAC Institute.
LABORATORIES
PASI-A Pace Analytical Services - Asheville
PASI-C Pace Analytical Services - Charlotte
ANALYTE QUALIFIERS
B2 Oxygen usage is less than 2.0 for all dilutions set. The reported value is an estimated less than value and is calculated
for the dilution using the most amount of sample.
B3 The dissolved oxygen depletion of the dilution water blank exceeded 0.2 mg/L.
D6 The precision between the sample and sample duplicate exceeded laboratory control limits.
L2 Analyte recovery in the laboratory control sample (LCS) was below OC limits. Results for this analyte in associated
samples may be biased low.
M1 Matrix spike recovery exceeded QC limits. Batch accepted based on laboratory control sample (LCS) recovery.
R1 RPD value was outside control limits.
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full.
Date: 10/26/2018 04:33 PM without the written consent of Pace Analytical Services, LLC. Page 11 of 15

u
aceAnalytical "
WWWPa "&Cl3m
QUALITY CONTROL DATA CROSS REFERENCE TABLE
Pace Analytical Services, I -LC
9800 Kincey Ave. Suite 100
Hunter-ville, NC 28078
[phone]
Project:
Pace Project No.:
Sampling 10/10/18
92402981
Analytical
Lab ID
Sample ID
QC Batch Method
QC Batch
Analytical Method
Batch
92402981001
W-01102103104105
EPA16642
437141
92402981001
W-01 /02103104105
EPA 200.7 Rev 4.4 1994
435623
EPA 200.7 Rev 4.4 1994
438685
92402981001
W-01102103104105
SM 254OD-2011
436051
92402981001
W-01/02103104105
SM 52108-2011
435686
SM 521OB-2011
435775
92402981001
W-01102103104105
EPA9040C
437594
92402981001
W-01/02/03104105
SM 5220D-2011
435801
SM 5220D-2011
435833
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.
Page 12 of 15

+
Document Name:
ample Condition Upon Recd t(SCUR)
Document Revised: February 7, 2018
Page 1 of 2
Document No.:
F CAR-CS-033-Rev.06
Issuing Authority:
Pace Carolinas Quality OffFca-
Laboratory receiving samples:
Asheville ❑ Eden[] Greenwood ❑ Huntersville [� Raleigh[] Mechanicsville[]
Client Name; Project #: ^O# : 92402981
Courier: []Fed Ex UPS ❑USPS
❑ Commercial []Pace ❑Other: 92402981
Custody Seal Present? ❑Yes [31;k Seals Intact? ❑Yes 011o'
osteJlnitlals Parson Examining Contan>3:,�✓ /(J"r
Packing Material: [I Bubble Wrap ❑Bubble Sags one ❑ Other Biological Tissue�—.� �Frozen?
Thermomete Type of ice: wet ©Blue ❑Nona []Yes[]NOIR Gun ID: 92TO45
Cooler Temp j'Ci: _ Correction Factor: Add/Subtract ('C) _� 1
Temp should be above freezing to WC
Cooler Tamp Corrected ('C):
[]Samples out of temp criteria. Samples on ice, cooling process
has begun
USDA Regulated Sall (ef`N/A• water sample)
Did samples orlaleate In a quarantine tone within the United States: CA, NY, or 5C (check" Did samples originate from a foreign source )intern" nally,
r1vPs Nn Indudlne Hawaii and Puerto Rical7 r1Y MAD
Comments/Discrepancy:
Chain of Custody Present?
Ely.
QN.
N/A
2.
Samples Arrived within Hold TIme7
Yes
No
NIA
2.
Short Hold Time Analysis e72 hr.)?
es
ONO
ONIA
3.
Rush Turn Around Time Requested?
0yes
EK.
❑N/A
4.
Sufficient Volume?
es
ONO
N/A
S.
Correct Containers Used?
-Pace Containers Used?
Oree$
es
❑No
ONO
ON/A.
N A
6.
Containers Intact?
es
ONO
N/A
7.
Dissolved analysis: Samples Field Filtered?
Elves
QNo
EJ NIA
B.
Sample Labels Match COC?
-Includes Datejrime/ID/Anal sis Matrix:
O es
-
ONO
❑N/A
9.
Heads ace in VOA Vials (aS-6mm)?
❑Yes
QNo
N/A
10.
Trip Blank Present?
Trip Blank CustodV Seals Present?
❑Yes
❑Yet
ONO
ND
NJA
N/A
21,
COMMENTS/SAMPLE DISCREPANCY
Field Data Required? ❑Yes []No
Lot ID of split containers: J
CLIENT NOTIFICATION/RESOLUTION
Person contacted:
Date/Tlme:
Project Manager SCURF Review: A Date: 10 Io -/K
Project Manager SRF Review: Ryfl 6 Date: � I V - 1 I'1
Page 13 of 15

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CHAIN -OF -CUSTODY 1 Analytical Request Document
The ChainohCusiody is a LEGAL DOCUMENT. AO relevant fields must be completed accurately.
Page: of
Section A
Section B Section C
Requlmd
t IMomiation: Requlrvd Pro)act information: Invoice tnf«matian:
Report To: �- AttenSien:
2228618
e. v
reds:
1
Copy To:
Company Name:
REGULATORY AGENCY
Adder'
r NPDES F GROUNDWATER F DRINKING WATER
FUST FRCRA OTHER
Email To:
Purchase Order No.:
Pem ouae
Retarence:
Phow
I Fax:
Project Name:
paCe Prnpcl
Site Location
rAarugar.
STATE:
Requested Otw
DeterTAT:
I
Project Number.
Pace Prone a:
Requested
Analysis
Filtered
(YIN)
Section
LL
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Z
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COLLECTED
Preservatives
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Waste Water WW
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SAMPLE ID Oil OL
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ADDITIONAL COMMENTS
RELINQUISHED BY I AFFILIATION
DATE
'T77n
TIME
ACCEPTED BY IAFFILIATION
DATE
TIME
SAMPLE CONDITIONS
6t .C--
0061
"'
Y1
SAMP[ ER NAME AND SIGNATURE
m
ORIGINAL
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PRINT Name of SAMPLER: 1
SiGNAT[IRE of SAMPLER: DATE Signed
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(MMfDDlYY): I f / I �;
- -- �-•-. -v nw s -- — you are aRopung Fora:- m r ,w oay paymem iambs ana agreeng to cute charges of 1.5% per mmm mr aey L-w not paid wghr 36 days. F-ALL-0-020rev.07. 15-May-2007

mGERDAU
August 31, 2018
Division of Water Quality
RECEIVED
Attn: Central Files SEP 11 2018
1617 Mail Service Center
Raleigh, NC 27699-1617 CENTRAL FILES
DVVR SECTION
RE: DMR's for Storm Water Permit NCS000304
Permitted Facility: Gerdau Ameristeel, US Inc- Charlotte Mill
To Whom It May Concern:
Please find enclosed signed copies of the Discharge Monitoring Report from the Gerdau Ameristeel US,
Inc. - Charlotte Steel Mil for Q2 (June — August) of 2018.
Please let us know if you need any additional information.
Sincerely,
Robert Churchill
Safety, Health and Environmental Manager
Gerdau — Charlotte Steel Mill
6601 Lakeview Road
Charlotte, NC 28269
[phone], ext. 3128

STORMWATER DISCHARGE OUTFALL (SDO)
MONITORING REPORT
Permit Number NCS 000304
FACILITY NAME Gerdau Ameristee_ 1 US, INC- Charlotte_
PERSON COLLECTING SAMPLE(S) Bob Churchill
CERTIFIED LABORATORY(S) Pace Analytical Lab # 12
Lab #
Part A: Specific Monitoring Requirements
SAMPLES COLLECTED DURING CALENDAR YEAR: 2018
(This monitoring report shall be received by the Division no later than 30 days from
the date the facility receives the sampling results from the laboratory.)
COUNTY Mecklenbure
PHONE NO. 704 596-0361
SIGNATURE OF PERMITTEE OR DESIGNEE
REQUIRED ON PAGE 2.
Outfall
Date
No.
Sample
Collected '
Total
Rainfall
Oil &
Grease
Total
Suspende
d Solid
SS
pH
Total
Copper
(Cu)
Total
Lead
(Pb)
Total
Nickel
(Ni)
Total
Zinc
(Zn)
Total •
Alumin
um
Al
Total
Cadmium
(Cd)
Total
Chromium
(Cr)
SOD
COD
mo/M r
inches
M L
Unit
L
L
KpJL
M L
M
_Mg1L
WEST
08/20/18
.81
<4.8
<8.6
7.7
<5.0
<5.0
<5.0
21.3
<100
<.1.0
<5.0
<2.0
<25.0
NORTH
NODI
SOUTHEAST
NODI
SOUTH
NODI
Does this facility perform Vehicle Maintenance Activities using more than 55 gallons of new motor oil per month? _yes X_no
(if yes, complete Part B)
Part B: Vehicle Maintenance Activity Monitoring Requirements
Outfall
No.
Date
Sample
Collected
50050
00556
00530
00400
Total Flow
(if applicable)
Total
Rainfall
Oil & Grease
(if appl.)
Non -polar
O&GITPH
(Method 1664
SGT-HEM), if
appl.
Total
Suspended
Solids
pH
New Motor
Oil Usage
mo/dd/ r
MG
inches
mg/1
m /l
unit
at/mo
Form SWU-247, last revised 21212012
Page 1 of 2

STORM EVENT C14ARACTERISTICS:
Date _08/19/18
Total Event Precipitation (inches): ..81
Event Duration (hours): (only if applicable — see permit.)
(if more than one storm event was sampled)
Date
Total Event Precipitation (inches):
Event Duration (hours): (only if applicable — see permit.)
Mail Original and one copy to:
Division of Water Quality
Attn: Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
"I certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a
system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person
or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the
best of my knowledge and belief, true, accurate, and complete. 1 am aware that there are significant penalties for submitting false information,
including the possibility of fines and imprisonment for knowing violations."
&). 0-�L614�
of Permittee)
3/ /8
(Date)
Form SWU-247, last revised 21212012
Page 2 of 2

aceAnalytical`
WWWpecele6im m
August 28, 2018
Bob Churchill
Gerdau AmeriSteel
PO Box 481980
Hambleton, WV 26269
RE: Project: Outfall W 8120/18
Pace Project No.: 92396418
Dear Bob Churchill:
Pace Analytical Services, LLC
9800 Kincey Ave, Suite 100
Huntersville, NC 28078
[phone]
Enclosed are the analytical results for sample(s) received by the laboratory on August 20, 2018. The
results relate only to the samples included in this report. Results reported herein conform to the most
current, applicable TNI/NELAC standards and the laboratory's Quality Assurance Manual, where
applicable, unless otherwise noted in the body of the report.
If you have any questions concerning this report, please feel free to contact me.
Sincerely,
i a, qq , t-f A U
Angela Baioni
[e-mail]
[phone]
Project Manager
Enclosures
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.
Page 1 of 16

laaceAnalyNo
wwwwala6amm
CERTIFICATIONS
Project: Outfall W 8/20118
Pace Project No.: 92396418
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Fluntersville, NC 28078
[phone]
Charlotte Certification IDs
9800 KinceyAve. Ste 100, Huntersville, NC 28078
South Carolina Certification #: 99006001
Louisiana/NELAP Certification # LA170028
FloridalNELAP Certification #: E87627
North Carolina Drinking Water Certification #: 37706
Kentucky UST Certification* 84
North Carolina Field Services Certification #: 5342
Virginia/VELAP Certification #: 460221
North Carolina Wastewater Certification #: 12
Asheville CertiFlcation IDs
2225 Riverside Drive, Asheville, NC 28804
Florida/NELAP Certification #: E87648
Massachusetts Certification #: M-NC030
North Carolina Drinking Water Certification #: 37712
North Carolina Wastewater Certification #: 40
South Carolina Certification #: 99030001
Virginia/VELAP Certification M 460222
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC. Page 2 of 16

Iace Analytical
(�wwwpacstabacam
SAMPLE ANALYTE COUNT
Project: OutfalI W 8/20118
Pace Project No.: 92396418
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
(704)B75-9092
Lab ID Sample ID Method
Analysts
Analytes
Reported
Laboratory
92396418001 SO-W-1-5 EPA1664B
JMS
1
PASI-C
EPA 200.7 Rev 4A 1994
SER
7
PASI-A
SM 254OD-2011
MVC
1
PASI-A
SM 521OB-2011
SMK
1
PASI-A
EPA9040C
SMK
1
PASI-A
SM 5220D-2011
GC
1
PASI-A
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in fufl,
without the written consent of Pace Analytical Services, LLC. Page 3 of 16

aceAnalytical'
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ANALYTICAL RESULTS
Project: Outfall W 8120118
Pace Project No.: 92396418
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
QG4)875.9092
Sample: SO-W-1-5 Lab ID: 92396418001 Collected: 08/20/18 11:15 Received: 08/20/18 15:35 Matrix: Water
Parameters
Results Units Report Limit
OF
Prepared
Analyzed
GAS No. Qual
HEM, Oil and Grease
Analytical Method: EPA 16648
Oil and Grease
NO mg/L
4.8
1
08/28/18 04:28
200.7 MET ICP
Analytical Method: EPA 200.7 Rev 4.4 1994 Preparation
Method: EPA 200.7 Rev 4.4 1994
Aluminum
NO ug1L
100
1
08/22/18 05:35
08/22/18 23:16
7429-90-5
Cadmium
NO ug/L
1.0
1
08/22/18 05:35
08/22/18 23:16
7440-43-9
Chromium
NO ug/L
5.0
1
08/22/18 05:35
08/22/18 23:16
7440-47-3
Capper
NO ug/L
5.0
1
08/22/18 05:35
08/22/18 23:16
7440-50-8
Lead
NO ug/L
5.0
1
08/22/18 05735
08/22/18 23:16
7439-92-1
Nickel
NO ug/L
5.0
1
08/22/18 05:35
08/22/18 23:16
7440-02-0
Zinc
21.3 ug/L
10.0
1
08/22/18 0535
08/22/18 23:16
7440-66-6
26400 Total Suspended Solids
Analytical Method: SM 254OD-2011
Total Suspended Solids
ND mg1L
8.6
1
08/21/18 22:58
5210B BOD, 5 day
Analytical Method: SM 521OB-2011
BOD, 5 day
ND mg1L
2.0
1
08/22/18 05:37
08/27/18 10:00
9040 pH
Analytical Method: EPA 9040C
pH at 25 Degrees C
7.7 Std. Units
0.10
1
08/22/18 17:01
H6
5220D COD
Analytical Method: SM 5220D-2011 Preparation Method:
SM 5220D-2011
Chemical Oxygen Demand
NO mg/L
25.0
1
08/23/18 17:07
08/23/18 23:06
RI
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
Date: 08/28/2018 12:42 PM without the written consent of Pace Analytical Services, LLC. Page 4 of 16

aceAnaljftal e
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QUALITY CONTROL DATA
Project: Outfall W 8/20118
Pace Project No,: 92396418
Pace Anaiytfcat Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
QC Batch: 427414
Analysis Method:
EPA 1664E
QC Batch Method: EPA 1664E
Analysis Description:
1664 HEM, Oil and Grease
Associated Lab Samples: 92396418001
METHOD BLANK: 2361134
Matrix: Water
Associated Lab Samples: 92396418001
Blank Reporting
Parameter
Units
Result Limit
Analyzed Qualifiers
Oil and Grease
mg1L
ND 4.8 08/28/18 04:21
LABORATORY CONTROL SAMPLE:
2361135
Spike LCS
1-CS % Rec
Parameter
Units
Conc. Result
% Rec Limits Qualifiers
Oil and Grease
mg1L
38.5 36.1
94 78-114
MATRIX SPIKE SAMPLE:
2361136
92395833004 Spike
MS MS % Rec
Parameter
Units
Result Conc.
Result % Rec Limits Qualifiers
Oil and Grease
mg1L
ND 38.5
37.4 97 78-114
Results presented on this page are In the units Indicated by the "units" column except where an alternate unit Is presented to the right of the result.
REPORT OF LABORATORY ANALYSIS
This report shah not be reproduced, except in full,
Date: 08/2812018 12:42 PM without the written consent of Pace Analytical Services, LLC. Page 5 of 16

aceAnalytrcal"
www.pecelaumni
QUALITY CONTROL DATA
Project: Outfall W 8/20/18
Pace Project No.: 92396418
QC Batch: 426250 Analysis Method: EPA200.7 Rev 4.4 1994
QC Batch Method: EPA200.7 Rev4.4 1994 Analysis Description: 200.7 MET
Associated Lab Samples: 92396418001
METHOD BLANK: 2356107
Associated Lab Samples: 92396418001
Parameter
Aluminum
Cadmium
Chromium
Copper
Lead
Nickel
Zinc
Matrix: Water
Units
Blank
Result
Reporting
Limit
Analyzed
ug/L
ND
100
08/22/18 23:10
ug/L
ND
1.0
08/22/18 23:10
ug/L
ND
5.0
08/22/18 23:10
uglL
ND
5.0
08/22/18 23:10
uglL
ND
5.0
08/22/18 23:10
ug/L
ND
5.0
08/22/18 23:10
ug1L
ND
10.0
08/22/18 23:10
Qualifiers
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
LABORATORY CONTROL SAMPLE:
2356108
Spike
LCS
LCS
% Rec
Parameter
Units
Conc.
Result
% Rec
Limits Qualifiers
Aluminum
ug/L
5000
5090
102
85-115
Cadmium
ug/L
500
476
95
85.115
Chromium
ug/L
500
498
100
85-115
Copper
ug/L
500
502
100
85-115
Lead
ug/L
500
464
93
85-115
Nickel
ug/L
500
474
95
85-115
Zinc
ug/L
500
452
90
85-115
MATRIX SPIKE & MATRIX SPIKE DUPLICATE:
2356109
2356110
MS
MSD
92396418001
Spike
Spike
MS
MSD
MS
MSD
% Rec
Parameter Units
Result
Cone.
Cone.
Result
Result
% Rec
`Yo Rec
Limits
RP❑ Qual
Aluminum
ug/L
ND
5000
5000
5110
5180
101
102
70-130
1
Cadmium
uglL
ND
500
5D0
474
479
95
96
70-130
1 ,
Chromium
ug/L
ND
500
500
490
493
98
98
70-130
1
Copper
ug/L
ND
500
500
490
495
98
99
70-130
1
Lead
ug/L
ND
500
500
453
456
91
91
70-130
1
Nickel
ug/L
ND
500
500
462
467
92
93
70-130
1
Zinc
ug1L
21.3
500
500
465
469
89
90
70-130
1
MATRIX SPIKE & MATRIX SPIKE DUPLICATE:
2356111
2356112
MS
MSD
92396556001
Spike
Spike
MS
MSD
MS
MSD
% Rec
Parameter Units
Result
Cone.
Cone.
Result
Result
% Rec
% Rec
Limits
RPD Qual
Aluminum
ug/L
ND
5000
5000
5000
5050
100
101
70-130
1
Cadmium
ug/L
ND
500
500
471
475
94
95
70-130
1
Results presented on this page are In
the unite Indicated by the
"Units" column except where an alternate
unit Is presented to the right of the result.
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
Date: 08/28/2018 12:42 PM without the written consent of Pace Analytical Services, LLC. Page 6 of 16

aceAnalytical"
www.pacelabacan
QUALITY CONTROL DATA
Project: Outfall W 8/20118
Pace Project No.: 92396418
Pace Analytical Services, LLC
9800 KinceyAve. Suite 100
Huntersville, NC 28078
[phone]
MATRIX SPIKE & MATRIX SPIKE DUPLICATE:
2356111
2356112
MS
MSD
92396556001
Spike
Spike
MS
MSD
MS
MSD
% Rec
Parameter
Units
Result
Conc.
Conc.
Result
Result
% Rec
% Rec
Limits
RPD Qual
Chromium
ug/L
ND
500
500
489
494
98
99
70-130
1
Copper
ug/L
ND
500
500
485
490
97
98
70-130
1
Lead
ug/L
ND
500
500
450
456
90
91
70-130
1
Nickel
ug/L
Nil
500
500
464
468
93
93
70-130
1
Zinc
ug/L
ND
500
500
452
455
90
91
70-130
1
Results presented on this page are In the unks Indicated by the "Units" column except where an alternate unit Is presented to the right of the result.
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
Date: 08/28/2018 12:42 PM without the written consent of Pace Analytical Services, LLC. Page 7 of 16

aceAnalytical
wxw.peceleba.com
Project: Outfall W 8120/18
Pace Project No.: 92396418
QC Batch: 426235
QC Batch Method: SM 254OD-2011
Associated Lab Samples: 92396418001
METHOD BLANK: 2356071
Associated Lab Samples: 92396418001
Parameter
Units
Total Suspended Solids
mg1L
LABORATORY CONTROL SAMPLE: 2356072
Parameter
Units
Total Suspended Solids
mglL
SAMPLE DUPLICATE: 2356073
Parameter
Units
Total Suspended Solids
mglL
SAMPLE DUPLICATE: 2356074
Parameter
Units
Total Suspended Solids
mg1L
QUALITY CONTROL DATA
i
Analysis Method: SM 254OD-2011
Analysis Description: 2540D Total Suspended Solids
Matrix: Water
Blank Reporting
Result Limit Analyzed Qualifiers
ND 2.5 08/21/1822:56
Spike LCS
Conc, Result
250 248
10444140001 Dup
Result Result
90.8 88.0
92396432001 Dup
Result Result
19.2 18.4
Paco Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
LCS % Rec
% Rec Limits Qualifiers
99 90-110
RPD Qualifiers
3
RPD Qualifiers
4
Results presented on this page are in the units Indicated by the "Units" column except where an alternate unit Is presented to the right of the result.
REPORT OF LABORATORY ANALYSIS
This report shell not be reproduced, except in full,
Date: 08/28/2018 12:42 PM without the written consent of Pace Analytical Services, LLC. Page 8 of 16

laceAnalXica!
wwwpecelebsoom
Project: Outfall W 8120118
Pace Project No.: 92396418.
QC Batch: 426257
QC Batch Method: SM 521OB-2011
Associated Lab Samples: 92396418001
METHOD BLANK: 2356139
Associated Lab Samples: 92396418001
Parameter Units
BOD, 5 day mg1L
LABORATORY CONTROL SAMPLE: 2356140
Parameter Units
BOD, 5 day mg/L
Pace Analytical Services, LLC
9800 mey Ave. Suite 100
Huntersville, NC 28078
[phone]
QUALITY CONTROL DATA
Analysis Method: SM 521OB-2011
Analysis Description: 5210E BOD, 5 day
Matrix: Water
Blank Reporting
Result Limit Analyzed Qualifiers
ND 2.0 0812711810:00
Spike LCS LCS % Rec
Conc. Result % Rec. Limits Qualifiers
198 186 94 64.6-115
SAMPLE DUPLICATE: 2356142
92396347001 Dup
Parameter Units Result Result
BOD, 5 day mg/L ND ND
RPD Qualifiers
Results presented on this page are In the units Indicated by the "Units" column except where an alternate unit is presented to the right of the result.
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
Date: 08/28/2018 12:42 PM without the written consent of Pace Analytical Services, LLC.
Page 9 of 16

aceAnalytical
www.pao wa.com
Project: 4utfall W 8120/18
Pace Project No.: 92396418
QC Batch: 426315
QC Batch Method: EPA 9040C
Associated Lab Samples: 92396418001
SAMPLE DUPLICATE: 2356312
Parameter
pH at 25 Degrees C
SAMPLE DUPLICATE: 2356313
Parameter
pH at 25 Degrees C
Units
Sid. Units
Units
Std. Units
QUALITY CONTROL DATA
Analysis Method: EPA 9040C
Analysis Description: 9040 pH
92395170001 Dup
Result Result
6.3 6.3
92396596001 Dup
Result Result
6.8 6.8
RPD Qualifiers
0 H6
RPD Qualifiers
0 H6
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Results presented on this page are In the units indicated by the "Units" column except where an alternate unit is presented to the right of the result.
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
Date: 08/28/2018 12:42 PM without the written consent of Pace Analytical Services, LLC. Page 10 of 16

aceAnalytical
www.Pocateba.com
QUALITY CONTROL DATA
Project: Outfall W 8120/18
Pace Project No.: 92396418
QC Batch: 426770 Analysis Method: SM 5220D-2011
QC Batch Method: SM 5220D-2011 Analysis Description: 5220D COD
Associated Lab Samples: 92396418001
METHOD BLANK: 2358477 Matrix: Water
Associated Lab Samples: 92396418001
Blank Reporting
Parameter Units Result Limit Analyzed Qualifiers
Chemical Oxygen Demand mg/L ND 25.0 08/23/18 23:06
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
LABORATORY CONTROL SAMPLE: 2358478
Spike LCS LCS % Rec
Parameter Units Conc. Result % Rec Limits Qualifiers
Chemical Oxygen Demand mg1L 750 735 98 90-110
MATRIX SPIKE & MATRIX SPIKE DUPLICATE: 2358479 2358480
MS MSD
92396418001 Spike Spike MS MSD MS MSD % Rec
Parameter Units Result Conc. Conc. Result Result % Rec % Rec Limits RPD Qua]
Chemical Oxygen Demand mg/L ND 100 100 121 117 110 105 90-110 4 R1
MATRIX SPIKE & MATRIX SPIKE DUPLICATE: 2358481 2358482
MS MSD
92396695003 Spike Spike MS MSD MS MSD % Rec
Parameter Units Result Conc. Conc. Result Result % Rec % Rec Limits RPD Qual
Chemical oxygen Demand mg1L 112 100 100 206 234 94 122 90-110 13 M1,R1
Results presented on this page are In the unite Indicated by the "Units" column except where an alternate unit is presented to the right of the result.
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
Date: 08/28/2018 12:42 PM without the written consent of Pace Analytical Services, LLC.
Page 11 of 16

Iacl
i lytical'
wwwpeaelaftoom
QUALIFIERS
Project: Outfall W 8/20/18
Pace Project No.: 92396418
DF - Dilution Factor, if reported, represents the factor applied to the reported data due to dilution of the sample aliquot.
ND - Not Detected at or above adjusted reporting limit.
TNTC - Too Numerous To Count
J - Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit.
MDL-Adjusted Method Detection Limit.
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
(704)B75-9092
PQL - Practical Quantitation Limit,
RL- Reporting Limit - The lowest concentration value that meets project requirements for quantitative data with known precision and
bias for a specific analyte in a specific matrix.
S - Surrogate
1,2-Diphenylhydrazine decomposes to and cannot be separated from Azobenzene using Method 8270. The result for each analyte is
a combined concentration.
Consistent with EPA guidelines, unrounded data are displayed and have been used to calculate % recovery and RPD values.
LCS(D) - Laboratory Control Sample (Duplicate)
MS(D) - Matrix Spike (Duplicate)
DUP - Sample Duplicate
RPD - Relative Percent Difference
NC - Not Calculable.
SG - Silica Gel - Clean -Up
U - Indicates the compound was analyzed for, but not detected.
Acid preservation may not be appropriate for 2 Chloroethylvinyl ether.
A separate vial preserved to a pH of 4.5 is recommended in SW846 Chapter 4 for the analysis of Acrolein and Acrylonitrile by EPA
Method 8260.
N-Nilrosodiphenylamine decomposes and cannot be separated from Diphenylamine using Method 8270. The result reported for
each analyte is a combined concentration.
Pace Analytical is TN accredited. Contact your Pace PM for the current list of accredited analytes.
TNI - The NELAC Institute.
LABORATORIES
PASI-A Pace Analytical Services - Asheville
PASI-C Pace Analytical Services - Charlotte
ANALYTE QUALIFIERS
H6 Analysis initiated outside of the 15 minute EPA required holding time.
M1 Matrix spike recovery exceeded OC limits. Batch accepted based on laboratory control sample (LCS) recovery.
R1 RPD value was outside control limits.
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
Date: 08/28/2018 12:42 PM without the written consent of Pace Analytical Services, LLC. Page 12 of 16

aceAnalj tical
ww wpecalebacom
QUALITY CONTROL DATA CROSS REFERENCE TABLE
Project: Outfall W 8/20118
Pace Project No.: 92396418
Pace Analytical Services, LLC
9800 KinceyAve. Suite 100
Huntersville, NC 28078
[phone]
Analytical
Lab ID
Sample ID
QC Batch Method
QC Batch
Analytical Method
Batch
9239641BOD1
SO-W-1-5
EPA1664B
427414
92396418001
SO-W-1-5
EPA 200.7 Rev 4.4 1994
426250
EPA 200.7 Rev 4.4 1994
426267
92396418001
SO-W-1-5
SM 254OD-2011
426235
92396418001
SO-W-1-5
SM 521013-2011
426257
SM 521OB-2011
426271
92396418001
SO-W-1-5
EPA 9040C
426315
92396418001
SO-W-1-5
SM 5220D-2011
426770
SM 5220D-2011
426833
Dale: 08/28/2018 12:42 PM
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.
Page 13 of 16

Document Name:
Daument Revised: February 7, 2018
Sample Condition Upon Recei t(SCUR)
Page 1 of 2
Document No..
issuing Authority-
r1 `
F-CAR-05-033-Rev,06
Pace Carolinas Quallpil Office
L`a oratory receivingsaitipies:'""_._..._..�...�.w._..�_,_....�.,,._..._�__.,,�..� �.W.._,,.......M�........�...W.....�...•__._........__..._..,._._.�_."�._...�_.
Asheville ❑ Eden[:] Greenwood ❑ Huntersville ❑� Raleigh[] Mechanicsville[]
U Client Name: 99 "
PrajecE9:
Courier: �-, F�ed Ex UPS LISPS Client
❑ Commercial I�*a ❑Other: q.
923964>&
Custody Sea! Present? (]Yes 09-0 Seals Intact? []Yes to !
Date/Initlals Penon Examining Contents:
Packing Material: 2 9ubble Wrap ❑Bubble Bags [_-]None ❑ Other BlologicalTlssue Fr en?
Thermometer: ❑Yes ❑No /A
-G fReurri fir— �- N • t�{ Type of ice: 2�et ❑Blue []Noce
Cooler Temp ('C): La Correction Factor Add/Subtract
Temp should be above freezing to 6'C
w 9 J l - i []Samples out of temp criteria. Samples an Ice, cooling piocess
hasbegun
USDA Regulated Soil ( NIA, water sample)
Did samples edgl!ate In a quarantine zone within the United States: CA, NY, or SC (check maps)? old samples originate from a foreign source (Interns pally,
I'IYes o Ineh Alm Hawaii and Puerto Rico)? rlYe nfro
Comments/Discrean :
Chain of Custody Present?
C ryes
No
NIA
I.
-Samples Arrived within Hold Time?
- es
ONO
❑N/A
2.
Short Hold Time Analysis (<72 hr.)?
aYes
Q6
MIA
3-
Rush Turn Around Time Requested?
QYes
124
K/A
4•
Sufficient Volume?
ofes
No
QNIA
S.
Correct Containers Used?
-Pace Containers Used?
es
[]NO
rim.
❑NIA
N/A
6.
Containers Intact?
' es
[:]No
El N/A
7.
Dissolved analysis; Samples Field Filtered?
❑Yes
ONO
A
B.
Sample Labels Match CDC?
-includes Date/Time/ID/Analysis Matrix:
[Xes
v)
❑No
[]N/A
9.
Headspace in VOA Vials >5-6mm)?
Yes
No
�N/4
10.
Trip Blank Present?
Trip Blank Custody Seals Present?
❑Yes
Yes
❑Na
No
A
11.
COMMENTS/SAMPLE UiSCREPANCY
Field Data Required? ❑Yes []No
Lot ID_ of split containers:
CLIENT NOTIFICATION/RESOLUTION
Person contacted: Date/nme:
Project Manager SCURF Review: Date:
Project Manager SRF Review: Date:
Page 14 of 16

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CHAIN -OF -CUSTODY 1 Analytical Request Document
The Chakn-ofLustody Is a LEGAL DOCUMENT. All relevant fields must be wmpleted accurately.
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U.S. Department of Commerce
National Oceanic & Atmospheric Administration
National Environmental Satellite, Data, and Information Service
Current Location: Elev: 728 ft. Lat: 35.2236° N Lon:-80.9552° W
Station: CHARLOTTE DOUGLAS AIRPORT. NC US 13881
Local Climatological Data
Daily Summary
August 2018
Generated on 08/3112018
National Centers for Environmental Information
151 Patton Avenue
Asheville, North Carolina 28BOl
D
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Temperature (F)
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(base 65F}
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13
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16
17
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70
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91
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0.0
0
29.13
5.8
20
240
15
310
23
82
65
73
-3.8
0
8
0549
1903
0.00
0.0
0
29.26
8.1
25
050
17
020
24
82
56'
69
-7.7
0
4
0550
1902
ODD
0.0
0
29.36
6.7
22
070
13
040
25
87
60
74
-2.5
0
9
0551
1900
ODD
0.0
0
29.40
4.3
18
D40
12
270
26
91
63
77
0.6
0
12
0552
1859
O.DO
0.0
0
29.39
3.5
14
020
9
020
27
0552 1
1858
ITS RA
Monthly Averages Totals
Departure from Norma! 1981-2010
Degree Days Number of days with...
MO hly
Season -to -date
Tern rature
Precipitation
Snow
Weather
Total
Departure
Total
Departure
Max
Min
Heating
>=90°
{=32°
.9=32°
c=0°
>=0.D1"
>=0.1-
>=1"
TStorrns
Heavy Fog
Cooling
Date of 5-sec to 3-sec wind equipment chan a
Sea Level Pressure
Greatest...
2009-06-02
Date
Time
24-Hr...
Snow Depth
Maximum
Preci
Snowfall
Minimum
Date
Station Augmentation
Name:FAA CWO Lat: N/A Lon: NIA Elevation: NIA Distance: 1.4mi SE Elements: TEMP, PRECIP, SNOW Equipment: PSY, SRG, SNOWBOARD

m GERDAU
June 11, 2018
Division of Water Quality
Attn: Central Files
1617 Mail Service Center
Raleigh, NC 27699-1617
RE: DMR's for Storm Water Permit NCS000304
Permitted Facility: Gerdau Ameristeel, US Inc- Charlotte Mill
To Whom It May Concern:
Please find enclosed signed copies of the Discharge Monitoring Report from the Gerdau Ameristeel US,
Inc- Charlotte Steel Mil for Q1 (March — May) of 2018. Please also find a corrected version of the Q4 (Dec
— Feb) of 2017. The original Q4 DMR for 2017 contained incorrectly converted sample results. Results for
all metals were reported in mg/I rather than p9/I. In addition, the rainfall reported on the Q4 was the total
rainfall for the month of December rather than for the single rain event during which the sample was
taken.
Please let us know if you need any additional information.
Since y,
!'� r
� W-
Bob Churchill
Safety, Health and Environmental Manager
n
d�
Xrn
r
CZ
rn
r`
a
z M
s-n

f
STORMWATER DISCHARGE OUTFALL (SDO)
MONITORING REPORT
Permit Number NCS 000304
FACILITY NAME _ Gerdau Ameristeel US, INC- Charlotte
PERSON COLLECTING SAMPLE(S) Bob Churchill
CERTIFIED LABORATORY(S) Pace Analytical Lab # 12
Lab #
Part A: Specific Monitoring Requirements
SAMPLES COLLECTED DURING CALENDAR YEAR: 2018
(This monitoring report shall be received by the Division no later than 30 days from
the date the facility receives the sampling results from the laboratory.)
COUNTY Mecklenburg
PHONE NO. 704 596-0361
SIGNATURE OF PERMITTEE OR DESIGNEE
REQUIRED ON PAGE 2.
Outfall
No.
Date
Sample.,
Collected
Total
Rainfall
Oil &
Grease
`_Total
Suspende
d Solid
TSS
pH
Total ,
Copper
(Cu)
Total
Lead
(Pb)
Total
Nickel
(Ni)
Total
Zinc
(Zn)
Total
Alumin
um
Al
Total
Cadmium
(Cd)
Total
Chromium
(Cr)
BOD
COD
mo/dd/ r
inches
M /L
M
Unit
/L
Pg1L
IL
/L.
/L
MIL
M /L
WEST
05/17/18
.03
<5.0
9.7
7.6
<5.0
<5.0
<5.0
<10.0
107
<.1.0
<5.0
<2.0
<25.0
NORTH
NOD[
SOUTHEAST
NODI
SOUTH
NODI
Does this facility perform Vehicle Maintenance Activities using more than 55 gallons of new motor oil per month?_ yes X_no
(if yes, complete fart B)
Part B: Vehicle Maintenance Activity Monitoring Requirements
Outfall
No.
Date
Sample,
Collected
50050
00556
00530
00400
Total Flow
(if applicable) _
Total
Rainfall
Oil &.Grease
(if appl.)
Non -polar
O&GITPH
(Method 1664
SGT-HEM), if
appi.
Total
Suspended
Solids
pH
New Motor
Oil Usage
mo/dd/ r.
MG
inches
m /l
mg/1
unit
al/mo
Form SWU-247, last revised 21212012
Page I of 2

STORM EVENT CHARACTERISTICS:
Date _05/17118
Total Event Precipitation (inches): .03
Event Duration (hours): (only if applicable — see permit.)
(if more than one storm event was sampled)
Date
Total Event Precipitation (inches):
Event Duration (hours): (only if applicable — see permit.)
Mail Original and one copy to:
Division of Water Quality
Attn: Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
"1 certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a
system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person
or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the
best of my knowledge and belief, true, accurate, and complete. 1 am aware that there are significant penalties for submitting false information,
including the possibility of fines and imprisonment for knowing violations."
VOW
of Permittee)
W/ //-! v
(Date)
Form SWU-247, last revised 21212012
Page 2 of 2

- .'bIL....s
STORMWATER DISCHARGE OUTFALL (SDO)
MONITORING REPORT
Permit Number NCS 000304
FACILITY NAME Gerdau Ameristeel US, INC- Charlotte
PERSON COLLECTING SAMPLE(S) Jill Gee
CERTIFIED LABORATORY(S) Pace Analytical Lab # 12
Lab #
Part A: Specific Monitoring Requirements
SAMPLES COLLECTED DURING CALENDAR YEAR: 2017
(This monitoring report shall be received by the Division no later than 30 days from
the date the facility receives the sampling results from the laboratory.)
COUNTY Mecklenburg
PHONE NO. ( 704 ) 596-0361
SIGNATURE OF PERMITTEE OR DESIGNEE
REQUIRED ON PAGE 2.
Outfall
Date
No. a
Sample
Collected
Total
Rainfall
Oil &
Grease
Total
Suspende,
d Solid
TSS
pH
Total
Copper .
(Cu)
Total
Lead
(Ph)
Total
Nickel
(Ni)
Total
'Zinc
(Zn)
Total
Alumin
um
Al
Total
Cadmium
(Cd)
Total
Chromium
(Cr)
BOD
COD
mo/dd/ r
inches
M /L
M
Unit
pgfL
L
L
/L
M
M /L
WEST
12/20/17
0.09
<5
7.4
7.0
<5.0
<5.0
<.5.0
10.0
116
<1.0
<5.0
27.8
28
NORTH
NODI
SOUTHEAST
NODI
SOUTH
NODI
Does this facility perform Vehicle Maintenance Activities using more than 55 gallons of new motor oil per month? _ yes X_no
(if yes, complete Part B)
Part B: Vehicle Maintenance Activity Monitoring Requirements
Outfall.
No.
Date
Sample
Collected
50050
00556
00530
00400
Total Flow
(if applicable)
Total
Rainfall
Oil ,& Grease
(if appl.)
Non -polar
O&G/TPH
(Method 1664
SGT-HEM), if
appl.
Total
Suspended
Solids
pH .
New Motor -
Oil Usage
mo/dd/ r '
MG
inches
m
m
unit
al/mo
Form SWU-247, last revised 21212012
Pagel of 2

STORM EVENT CHARACTERISTICS:
Date _12/20/17
Total Event Precipitation (inches): 0.09
Event Duration (hours): (only if applicable — see permit.)
(if more than one storm event was sampled)
Date
Total Event Precipitation (inches):
Event Duration (hours): (only if applicable — see permit.)
Mail Original and one copy to:
Division of Water Quality
Attn: Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
"I certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a
system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person
or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the
best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information,
includin possibility of fines a d imprisonment for knowing violations."
L11 LV
O'er"
of Permittee)
(Date)
Form SWU-247, last revised 21212012
Page 2 of 2

STORMWATER DISCHARGE OUTFALL (SDO)
MONITORING REPORT
Permit Number NCS 000304
FACILITY NAME Gerdau Ameristeel US, INC- Charlotte
PERSON COLLECTING SAMPLE(S) Jill Gee
CERTIFIED LABORATORY(S) _ Pace Analytical Lab # 12
Lab #
Part A: Specific Monitoring Requirements
SAMPLES COLLECTED DURING CALENDAR YEAR: 2017
(This monitoring report shall be received by the Division no later than 30 days from
the date the facility receives the sampling results from the laboratory.)
COUNTY Mecklenbure
PHONE NO. 704 596-0361
SIGNATURE OF PERMITTEE OR DESIGNEE
REQUIRED ON PAGE 2.
Outfall_ _
Date.
No.
_
:Sample
Collected
Total
Rainfall
Oil &
Grease
Total
Suspende
d Solid
TSS(Al)
pH
Total
Copper
(Cu)
Total
Lead
(Pb)
Total
Nickel
(Ni)
Total
Zinc
(Zn)
Total
Alumin
um
Total
Cadmium
(Cd)
Total
Chromium
(Cr)
BOD
COD
mo/ddl r
inches
M /L
MgtL
Unit
L
AWL
L
/L
L
1191L
1191L
MIL'
M /L
WEST
12/20/17
5.72
<5
7.4
7.0
<.005
<.005
<.005
.01
.116
<.001
< 05
27.8
28
NORTH
NODI
SOUTHEAST
NODI
J 18
SOUTH
NOW
Does this facility perform Vehicle Maintenance Activities using more than 55 gallons of new motor oil per month?_ yes X_no
(if yes, complete Part B)
Part B: Vehicle Maintenance Activity Monitoring Requirements
Outfall
No.
Date
Sample
Collected-
.50050
00556
00530
00400
Total Flow
(if applicable)
Total
Rainfall
Oil & Grease
(if appl.)
Non -polar
O&GITPH
(Method 1664
SGT-HEM), if
appl.
Total
Suspended
7Solids
pH
New Motor
Oil Usage
mo/dd/ r
MG
inches
mg/1
m
unit
aVmo.
Form SWU-247, last revised 21212012
Pagel of 2

r.
1
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f
1
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7
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ilk•..
t
.a

STORM EVENT CHARACTERISTICS:
Date _12/20/17
Total Event Precipitation (inches): 5.72
Event Duration (hours): (only if applicable — see permit.)
(if more than one storm event was sampled)
Date
Total Event Precipitation (inches):
Event Duration (hours): (only if applicable — see permit.)
Mail Original and one copy to:
Division of Water Quality
Attn: Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
"1 certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a
system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person
or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the
best of my knowledge and belief, true, accurate, and complete. 1 am aware that there are significant penalties for submitting false information,
including the possibility of fines and imprisonment for knowing violations."
re of Permittee)
(Date)
Form SWU-247, last revised 21212012
Page 2 of 2

�Y
4 Y7
a
S
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TY
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t
1 _
4
_
4
A
d
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lot i

Permit Number NCS`000304-"�
STORMWATER DISCHARGE OUTFALL (SDO)
MONITORING REPORT
SAMPLES COLLECTED DURING CALENDAR YEAR: 2017
(This monitoring report shall be received by the Division no later than 30 days from
the date the facility receives the sampling results from the laboratory.)
FACILITY NAME Gerdau Ameristeel US, INC- Charlotte COUNTY Mecklenburg
PERSON COLLECTING SAMPLE(S) Jill Gee PHONE NO. (704 ) 596-0361
CERTIFIED LABORATORY(S) Pace Analytical -_Lab # 12
Lab #
RECEIVE SIGNATURE OF PERMITTEE OR DESIGNEE
Part A: Specific Monitoring Requirements DEC
2017 REQUIRED ON PAGE 2.
Outfall
No.
Date
Sample
Collected
.4
Total
Rainfall
Oil &
Grease
Total
Suspende
d Solid
TSS
pH
Total
Copper
(Cu)
Lead
(Pb)
To al
Nickel
(Ni)
Total
Zinc
(Zn)
Total
Alumin
um
(AI).
Total
Cadmium
(Cd)
Total
Chromium
(Cr)
BOD
COD
mo/dd/ r
inches
M
M L
Unit
jigfL
pg/L
/L
L
M /L
M /L
WEST
11/8/17
.72
<5
235
7.4
103
28.8
17.7
119
6050
<1
48.7
388
34
WEST
11/21/17
0
13.2
<.005
<10
139
<2
NORTH
NODI
-SOUTHEAST
NODI
SOUTH
NODI
Does this facility perform Vehicle Maintenance Activities using more than 55 gallons of new motor oil per month?_ yes X_no
(if yes, complete Part B)
Part B: Vehicle Maintenance Activity Monitoring Requirements
Outfall
No.
Date
Sample
Collected
50050
00556
00530
00400
Total Flow
(if applicable)
Total
Rainfall
Oil & Grease
(if appl.)
Non -polar
O&G/TPH
(Method 1664
SGT-HEM), if
appl.
Total ,
Suspended
Solids
pH
New Motor
Oil Usage
mo/dd/ r
MG
inches
m
m
unit
al/mo
Form SWU-247, last revised 21212012
Page 1 of 2

STORM EVENT CHARACTERISTICS:
Date 11/8/17
Total Event Precipitation (inches): .72
Event Duration (hours): _7 (only if applicable — see permit.)
(if more than one storm event was sampled)
Date 11/21/17
Total Event Precipitation (inches): 0
Event Duration (hours): NIA (only if applicable — see permit.)
Mail Original and one copy to:
Division of Water Quality
Attn: Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
"I certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a
system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person
or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the
best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information,
including the possibility of fines and imprisonment for knowing violations."
(Sighature of Permittee)
l/,,?� f
(Date)
Form SWU-247, last revised 21212012
Page 2 of 2

w. .
Permit Number NCS 000304
RGE
ST�=F�ING RE ORT ALL (SDO)
SEp U 7 2W7
CENTRAL FILES
DWR SECTION
FACILITY NAME Gerdau Ameristeel US, INC- Charlotte
PERSON COLLECTING SAMPLE(S) Jill Gee
CERTIFIED LABORATORY(S) Pace Analytical Lab # 12
Lab #
Part A: Specific Monitoring Requirements
SAMPLES COLLECTED DURING CALENDAR YEAR:
(This monitoring report shall be received by the Division no later than 30 days from
the date the facility receives the sampling results from the laboratory.)
COUNTY Mecklenburg,
PHONE NO. ( 704 ) 546-0361
SIGNATURE OF PERMITTEE OR DESIGNEE
REQUIRED ON PAGE 2.
Outfall
Date
No.
Sample
Collected
Total
Rainfall
Oil&
Grease
Total
Suspende
d Solid
SS
pH
Total
Copper
(Cu)
Total
Lead
(Ph)
Total
Nickel
(Ni)
Total
Zinc
.(Zn)
Total
Alumin
um
Al
Total
Cadmium
(Cd)
Total
Chromium
(Cr)
BOD
COD
mo/dd/ r
inches
M
M L
Unit
/L
IL
/L
pglL
L i
MIL
M /L
WEST
08/07/17
1.35
ND
14.2
7.2
ND
ND
ND
ND
162
ND
ND
4.5
32
NORTH
N b d l ch
Y V
Does this facility perform Vehicle Maintenance Activities using more than 55 gallons of new motor oil per month? yes yno
(if yes, complete Part B)
Part B: Vehicle Maintenance Acti ity MonitoringRe uirements
Outfall
No.
Date
Sample
Collected
50050
00556
00530
00400
Total Flow
(if applicable)
Total
Rainfall
Oil & Grease
(if appl.)
Non -polar.
O&G/TPH
(Method 1664
SGT-HEM), if .
appl.
Total ..
Suspended
Solids
pH,
New Motor -
Oil Usage
mo/dd/ r
MG
inches
m /l
m
unit
allmo -
Form S WU-247, last revised 21212012
Paget of 2

STOILSI EVENT CHARACTERISTICS:
.Date —) i --]
Total Event Precipitation (inches):
Event Duration (hours):
(only if applicable — see permit.)
(if more than one storm event was sampled)
Date
Total Event Precipitation (inches):
Event Duration (hours): (only if applicable — see permit.)
Mail Original and one copy to:
Division of Water Quality
Attn: Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
"I certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a
system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person
or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the
best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information,
including the possibility of fines and imprisonment for knowing violations."
i7
(gigfiature of Permittee) (Date)
Form SWU-247, last revised 212120I2
Page 2 of 2

4
aceAnalj&al
www.paeafa8s.com
August 16, 2017
Jill Gee
Gerdau AmeriSteel
PO Box 481980
Hambleton, WV 26269
RE: Project: Outfall W 8/7/17
Pace Project No.: 92350498
Dear Jill Gee:
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 280Y8
[phone]
Enclosed are the analytical results for sample(s) received by the laboratory on August 08, 2017. The
results relate only to the samples included in this report. Results reported herein conform to the most
current, applicable TNI/NELAC standards and the laboratory's Quality Assurance Manual, where
applicable, unless otherwise noted in the body of the report.
If you have any questions concerning this report, please feel free to contact me.
Sincerely,
0 ", r�
Angela Baioni
[e-mail]
[phone]
Project Manager
Enclosures
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.
Page 1 of 16

• aceAnalyical
wwwpscefahacnm
CERTIFICATIONS
Project: Outfali W 817117
Pace Project No.: 92350498
r.
Pace: Analytical Services, LLC `
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Charlotte Certification 10s
9800 Kincey Ave. Ste 100, Huntersvil le, NC 28078
South Carolina Certification #: 99006001
North Carolina Drinking Water Certification #: 37706
Florida/NELAP Certification #: E87627
North Carolina Field Services Certification #: 5342
Kentucky UST Certification #: 84
North Carolina Wastewater Certification #: 12
Virginia/VELAP Certification #: 460221
Asheville Certiflcation IDs
2225 Riverside Drive, Asheville, NC 28804 North Carolina Wastewater Certification #: 40
Florida/NELAP Certification #: E87648 South Carolina Certification #: 99030001
Massachusetts Certification #: M-NC030 VirginiafVEIAP Certification #: 460222
North Carolina Drinking Water Certification #: 37712
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC. Page 2 of 16

Pace Analytical Services, LLC
aceAnalytical s
9800 Kincey Ave. Suite 100
Ftuntersville, NC 280�8
wwwpeoalabs.com
[phone]
SAMPLE ANALYTE COUNT
Project: Outfall W 817117
Pace Project No.: 92350498
Analytes
Lab ID Sample ID
Method
Analysts
Reported Laboratory
92350498001 SD-W-1-5
EPA 1664B
JMS
1 PASI-C
EPA 200.7
SER
7 PASI-A
SM 2540D
SLB
1 PASI-A
SM 52108
ECH
1 PASI-A
EPA 9040
KDF1
1 PASI-A
SM 5220D
NAL
1 PASI-A
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC. Page 3 of 16

aceAnalytical a
aavrvpace7absoom
ANALYTICAL RESULTS
Project: Outfall W 817117
Pace Project No.: 92350498
r
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Sample: SD-W-1-5
Lab ID: 92350498001 Collected: 08/07/17 12:00
Received: 08/08/17 08:00 Matrix: Water
Parameters
Results Units
Report Limit
DF
Prepared
Analyzed
CAS No. Qua]
HEM, Oil and Grease
Analytical Method: EPA 16648
Oil and Grease
ND mg/L
5.0
1
08/16/17 05:30
200.7 MET ICP
Analytical Method: EPA200.7 Preparation Method: EPA200.7
Aluminum
162 ug/L
100
1
08/1411714:10
0811511715:34
7429-90-5
Cadmium
ND ug/L
1.0
1
08/1411714:10
08/15/1715:34
7440-43-9
Chromium
ND ug/L
5.0
1
08/14/1714:10
08115/1715:34
7440-47-3
Copper
ND ug/L
5.0
1
08/14/1714:10
08115/17 1 5:34
7440-50-8
Lead
ND ug/L
5.0
1
08/1411714:10
08115/1715:34
7439-92-1
Nickel
ND ug/L
5.0
1
08/14/1714A0
08/1511715:34
7440-02-0
Zinc
ND ug/L
10.0
1
08/14/1714:10
08/15/1715:34
7440-66-6
2640D Total Suspended Solids
Analytical Method: SM 2540D
Total Suspended Solids
14.2 mg1L
5.0
1
08/14/17 1142
D6
52108 BOD, 5 day
Analytical Method: SM 5210B
BOD, 5 day
4.3 mg/L%
2.0
1
08/09/17 04:20
08/14/17 11:40
L2
9040 pH
Analytical Method: EPA9040
pH
7.2 Std. Units
0.10
1
08/11/1708:27
H6
52200 COD
Analytical Method: SM 5220D
Chemical Oxygen Demand
32.0 mg1L
25.0
1
08/14/17 14:05
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
Date: 08/16/2017 06:43 PM without the written consent of Pace Analytical Services, LLC. Page 4 of 16
r

aceAnalytibal
www.pacelabs.cam
Project: Outfall W B17117
Pace Project No.: 92360498
QC Batch: 373538
QC Batch Method: EPA 1664B
Associated Lab Samples: 92350498001
METHOD BLANK: 2069811
Associated Lab Samples: 92350498001
Parameter Units
Oil and Grease mg1L
QUALITY CONTROL DATA
Analysis Method: EPA 1664B
Analysis Description: 1664 HEM, Oil and Grease
Matrix: Water
Blank Reporting
Result Limit Analyzed Qualifiers
NO 5.0 08/16/17 05:18
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
LABORATORY CONTROL SAMPLE:
2069812
Spike LCS
LCS
% Rec
Parameter
Units
Conc. Result
% Rec
Limits
Qualifiers
Oil and Grease
mg/L
40 37.1
93
78-114
MATRIX SPIKE SAMPLE:
2069813
35329509001 Spike
MS
MS
% Rec
Parameter
Units
Result Conc.
Result
% Rec
Limits Qualifiers
Oil and Grease
mg1L
54.5 40
92.9
96
78-114
Results presented on this page are In the units Indicated by the "Units" column except where an alternate unit Is presented to the right of the result.
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
Date: 08/16/2017 06:43 PM without the written consent of Pace Analytical Services, LLC. Page 5 of 16

1ac,eAnalytical"
w wvpacelaftmm
QUALITY CONTROL DATA
Project: Outfall W 8/7117
Pace Project No.: 92350498
QC Batch: 372824 Analysis Method: EPA 200.7
QC Batch Method: EPA 200.7 Analysis Description: 200.7 MET
Associated Lab Samples: 92350498001
METHOD BLANK: 2065686
Matrix: Water
Associated Lab Samples: 92350498001
Blank
Reporting
Parameter
Units
Result
Limit
Analyzed Qualifiers
Aluminum
ug1L
ND
100
08/1511714:26
Cadmium
uglL
NO
1.0
0811511714:26
Chromium
ug1L
ND
5.0
08/1511714:26
Copper
ug/L
NO
5.0
08/1511714:26
Lead
uglL
ND
5.0
08/15/1714:26
Nickel
ug/L
ND
5.0
08/1511714:26
Zinc
uglL
ND
10.0
08/1511714:26
LABORATORY CONTROL SAMPLE:
2065687
Parameter
Units
Aluminum
ug/L
Cadmium
ug/L
Chromium
ug/L
Copper
ug/L
Lead
ug/L
Nickel
ug/L
Zinc
ug/L
r
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Spike
LCS
LCS
% Rec
Conc.
Result
% Rec
Limits Qualifiers
5000
5000
100
85-115
500
478
96
85-115
500
482
96
85-115
500
507
101
85-115
500
492
98
85-115
500
481
96
85-115
500
499
100
85-115
MATRIX SPIKE & MATRIX SPIKE DUPLICATE: 2065688
MS
92350542001 Spike
Parameter Units Result Conc.
MSD
Spike
Conc,
2065689
MS
Result
MSD
Result
MS
% Rec
MSD
% Rec
% Rec
Limits
RPD Qua]
Aluminum
uglL
0.11
5000
5000
5100
5030
100
98
70-130
1
mg1L
Cadmium
ug/L
ND
500
500
473
464
95
93
70-130
2
Chromium
ug/L
ND
500
500
480
473
96
95
70-130
1
Copper
ug/L
0.017
500
500
521
515
101
100
70-130
1
mg/L
Lead
ug/L
ND
500
500
483
474
96
94
70-130
2
Nickel
ug/L
ND
500
500
476
469
95
94
70-130
1
Zinc
uglL
ND
500
500
496
489
98
96
70-130
1
Results presented on this page are In the units Indicated by the "Units" column except where an alternate unit is presented to the right of the result.
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
Date: 08/16/2017 06:43 PM without the written consent of Pace Analytical Services, LLC. Page 6 of 16

lac,
Pace Analytical Services, LLC
Analytical a
9800 Kincey Ave, Suite 100
Huntersville, NC 28098
www.paoalabs.mm
[phone]
QUALITY CONTROL DATA
Project: Outfall W 817117
Pace Project No.: 92350498
MATRIX SPIKE & MATRIX SPIKE DUPLICATE:
2065690
2065691
MS
MSD
92350498001
Spike
Spike
MS
MSD
MS
MSD
% Rec
Parameter
Units
Result
Conc.
Conc.
Result
Result
% Rec
% Rec
Limits
RPD Qual
Aluminum
ug1L
162
5000
5000
5350
5310
104
103
70-130
1
Cadmium
ug1L
ND
500
500
460
453
92
91
70-130
2
Chromium
ug1L
ND
500
500
469
462
94
92
70-130
2
Capper
ug1L
ND
500
500
513
505
102
101
70-130
2
Lead
ug1L
ND
500
500
478
475
95
94
70-130
1
Nickel
ug/L
ND
500
500
467
461
93
92
70-130
1
Zinc
ug]L
ND
500
500
491
485
97
96
70-130
1
Results presented on this page are In the units Indicated by the "Units" column except where an alternate unit is presented to the right of the result,
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
Date: 08116/2017 06:43 PM without the written consent of Pace Analytical Services, LLC. Page 7 of 16

acmnalytical
www.pecalabs.com
r.
Pace Analytical Services, LLC '
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
QUALITY CONTROL DATA
Project: Outfall W 817117
Pace Project No:: 92350498
QC Batch: 373i19 Analysis Method: SM 2540D
QC Batch Method: SM 2540D Analysis Description: 25400 Total Suspended Solids
Associated Lab Samples: 92350498001
METHOD BLANK: 2067494
Associated Lab Samples: 92350498001
Parameter Units
Total Suspended Solids mglL
LABORATORY CONTROL SAMPLE: 2067495
Parameter Units
Total Suspended Solids mglL
SAMPLE DUPLICATE: 2067496
Parameter
Total Suspended Solids
SAMPLE DUPLICATE: 2067497
Parameter
Total Suspended Solids
Matrix: Water
Blank Reporting
Result Limit Analyzed Qualifiers
ND 2.5 08/1411713:42
Spike LCS LCS % Rec
Conc. Result % Rec Limits Qualifiers
250 244 98 90-110
92350498001 Dup
Units Result Result RPD Qualifiers
mglL 14.2 16.8 17 D6
92350911001 Dup
Units Result Result RPD Qualifiers
mglL ND ND
Results presented on this page are In the units Indicated by the "Units" column except where an alternate unit Is presented to the right of the result.
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
Date: 08116/2017 06:43 PM without the written consent of Pace Analytical Services, LI.C. Page 8 of 16

aceAnalytical
ww.pacalabs.00m
Project: Outfall W 8/7117
Pace Project No.: 92350498
QC Batch: 372454
OC Batch Method: SM 5210B
Associated Lab Samples: 92350498001
METHOD BLANK: 2063494
Associated Lab Samples: 92350498001
Parameter
BOD, 5 day
QUALITY CONTROL DATA
Analysis Method: SM 5210B
Analysis Description: 52108 BOD, 5 day
Matrix: Water
Blank Reporting
Units Result Limit Analyzed Qualifiers
mg/L 1 ND 2.0 08114/1711:40
LABORATORY CONTROL SAMPLE: 2063495
Spike LCS
Parameter Units Conc. Result
BOD, 5 day mg/L 198 166
SAMPLE DUPLICATE: 2063496
92350693001 Dup
Parameter Units Result Result
800, 5 day mg/L 4.5 4.5
Pace Analytical Services, LLC
9800 KinceyAve. Suite 100
Huntersville, NC 28018
[phone]
LCS % Rec
% Rec Limits Qualifiers
84 84.6-115.4 L2
RPD Qualifiers
1
Results presented on this page are In the units Indicated by the "Units" column except where an alternate unit Is presented to the right or the result.
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
Date: 08/16/2017 06:43 PM without the written consent of Pace Analytical Services, LLC. Page 9 of 16

acmnalytical
www.pat;Wahswm
QUALITY CONTROL. DATA
Project: Outfall W 817117
Pace Project No.: 92350498
QC Batch: 372557 Analysis Method: EPA9040
QC Batch Method: EPA 9040 Analysis Description: 9040 pH
Associated Lab Samples: 92350498001
SAMPLE DUPLICATE: 2064025
Parameter
pH
SAMPLE DUPLICATE: 2064026
Parameter
pH
92349778001 Dup
Units Result Result
Std. Units 6.5 6.6
02350258002 Dup
Units Result Result
Std, Units 8.0 8.0
RPD Qualifiers
1 H6
RPD Qualifiers
0 H6
+-
Paco Analytical Services, LLC '
9800 Kincey Ave, Suite 100
Huntersville, NG 28078
(704)B75-9D92
Results presented on this page are in the units Indicated by the "Units" column except where an alternate unit Is presented to the right or the result.
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
Date: 08/16/2017 06:43 PM without the written consent of Pace Analytical Services, LLC. Page 10 of 16

aceAnalytical'
ww'Pacefabs,Mn
QUALITY CONTROL DATA
Project: Outfall W 8l7117
Pace Project No.: 92350498
Pace Analytical Services, LLC
9800 KinceyAve. Suite '1DO
Huntersviffe, NC 2807B
[phone]
QC Batch: 373047
Analysis Method: SM 5220D
QC Batch Method: SM 5220D
Analysis Description: 5220D COD
Associated Lab Samples: 92350498001
METHOD BLANK: 2067159
Matrix: Water
Associated Lab Samples: 92350498001
Blank Reporting
Parameter Units
Result Limit
Analyzed Qualifiers
Chemical Oxygen Demand mg1L
ND 25.0
08/14/17 14:05
LABORATORY CONTROL SAMPLE: 2067170
Spike LCS
LCS % Rec
Parameter Units
Cone. Result
% Rec Limits Qualifiers
Chemical Oxygen Demand mglL
750 722
96 90-110
MATRIX SPIKE & MATRIX SPIKE DUPLICATE: 2067171 2067172
MS MSD
92350458005
Spike Spike MS
MSD MS MSD % Rec
Parameter Units Result
Cone. Cone, Result
Result % Rec % Rec Limits RPD Qual
Chemical Oxygen Demand mglL 115
750 750 879
867 102 100 90-110 1
MATRIX SPIKE & MATRIX SPIKE DUPLICATE: 2067173 2067174
MS MSD
92350498001 Spike Spike MS ' MSD MS MSD % Rec
Parameter Units Result Cone. Cone. Result Result % Rec % Rec Limits RPD Qual
Chemical Oxygen Demand mglL 32.0 750 750 789 797 101 102 90-110 1
Results presented on this page are In the units Indicated by the "Units" column except where an alternate unit Is presented to the right of the result.
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
Date: 09/16/2017 06:43 PM without the written consent of Pace Analytical Services, LLC.
Page 11 of 16

Pace Analytical Services, LLC
aceAnalytical ® 9800 Kincey Ave. Suite 100
Huntersville, NC 28078
www.pomlebs.com [phone]
QUALIFIERS
Project: Outfall W 817117
Pace Project No.: 92350498
DEFINITIONS
DF - Dilution Factor, if reported, represents the factor applied to the reported data due to dilution of the sample aliquot.
ND - Not Detected at or above adjusted reporting limit.
TNTC - Too Numerous To Count
J - Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit.
MDL- Adjusted Method Detection Limit.
PQL - Practical 0uantitation Limit.
RL - Reporting Limit.
S - Surrogate
1,2-Diphenyihydrazine decomposes to and cannot be separated from Azobenzene using Method 8270. The result for each analyte is
a combined concentration.
Consistent with EPA guidelines, unrounded data are displayed and have been used to calculate % recovery and RPD values.
LCS(D) - Laboratory Control Sample (Duplicate)
MS(D) - Matrix Spike (Duplicate)
DUP - Sample Duplicate
RPD - Relative Percent Difference
NC - Not Calculable.
SG - Silica Gel - Clean -Up
U - Indicates the compound was analyzed for, but not detected.
Acid preservation may not be appropriate for 2 Chloroethylvinyl ether.
A separate vial preserved to a pH of 4-5 is recommended in SW846 Chapter 4 for the analysis ofAcrolein and Acrylonitrile by EPA
Method 8260.
N-Nitrosodiphenylamine decomposes and cannot be separated from Diphenylamine using Method 8270. The result reported for
each analyte is a combined concentration.
Pace Analytical is TNI accredited. Contact your Pace PM far the current list of accredited analytes.
TNI - The NELAC Institute,
LABORATORIES
PASI-A Pace Analytical Services -Asheville
PASI-C Pace Analytical Services - Charlotte
ANALYTE QUALIFIERS
D6 The precision between the sample and sample duplicate exceeded laboratory control limits.
H6 Analysis initiated outside of the 15 minute EPA required holding time.
L2 Analyte recovery in the laboratory control sample (LCS) was below QC limits. Results for this analyte in associated
samples may be biased low.
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full.
Date: 08/16/2017 06:43 PM without the written consent of Pace Analytical Services, LLG. Page 12 of 16

aceAnalytical
www.pacedebscom
QUALITY CONTROL DATA CROSS REFERENCE TABLE
Project: Outfall W 8/7117
Pace Project No.: 92350498
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Lab ID
Sample ID
QC Batch Method
QC Batch Analytical Method
92360498001
SD-W-1-5
EPA1664B
373538
92350498001
SD-W-1-5
EPA 200.7
372824 EPA 200.7
92350498001
SD-W-1-5
SM 2540D
373119
92350498001
SD-W-1-5
SM 5210E
372454 SM 5210B
92350498001
SD-W-1-5
EPA9040
372557
92350498001
SD-W-11-5
SM 5220D
373047
Date: 08/16/2017 06:43 PM
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC,
Analytical
Batch
373300
372476
Page 13 of 16

Document Name:
Document Revised: August 4, 2017
Sample Condition Upon Receipt(SCUR)
Page 1 of 2
Document No,:
Issuing Authority:
c?CeAnalXkal-
F•CAR-CS•033•Rev.04
Pace Quality Office
Laboratory receiving samples:
Asheville ❑ Cden❑
Courier.
❑ Commercial
Custody Seal Present?
Greenwood ❑ Huntersville [�] Raleigh❑ Mechanicsville[]
Client Name; WU* v 923;) 498
CSQrrt t,.., 1 Project g: � t
T ❑Fed Ex ❑UPS ❑USPS Eftlient
❑Pace Mother: 92350498
L
❑Yes /a Seals Intact? Dyes No
Packing Material: []Bubble Wrap
Thermometer:
Bubble Bags []None ❑ Othei
❑ AGun ID: W]Wet ❑Blue
Type of ice:
Correction Factor: Cooler Temp Corrected ('C): 7 U
USDA Regulate Soil ( NIA, water sample)
Did samples on mate in a quarantine zone within the United States: CA, NY, or 5C (check maps)?
1-1Yee rVn
{ { 5y
Datelinitials Person Examining Contents: D �O _ l 7
Biologic�a..11'n a Frozen?
17Yes It 1Na SIN/A
❑None
Temp should be above freezing to 6'C
❑Samples out of temp criteria. Samples on ice, cooling process
has begun
Did samples originate from a foreign source (inter ationally,
including Hawaii and Puerto Riro)? 17Yes P9No
Comments/Discrepancy:
Chain of Custody Present?
C414
[]No
ONIA
1.
Samples Arrived within Hold Time?
2es
`❑N
❑N/A
2.
Short Hold Time Analysis (<72 hr.)?
❑Y s
RfN.
❑NJA
3.
Rush Turn Around Time Requested?
Ye
No
N/A
4,
Sufficient Volume? -
01V
QNo
❑NIA
5.
Correct Containers Used?
-Pace Containers Used?
Y
a
❑No
Na
❑N/A
N/A
6.
Containers Intact?
Yes
❑
N/A
7.
Dissolved analysis: Samples Field Filtered?
EfN.
N/A
B.
Sample Labels Match CDC?
-Includes Date/Time ID/Anal sis Matrix:
es
f
[]NO
❑N/A
9.
Heads ace in VIDA Vials (>5-6mm)?
Yes
❑
NJA
10,
Trip Blank Present?
Trip Blank Custod Seals Present?
❑Yes
yes
CAO
❑No
71,
11.
CLIENT NOTIFICATION/RESOLUTION
Person Contacted:
Comments/Sample Discrepancy:
Lot ID of split containers:
Date/Time:
Field Data Required? ❑Yes Elmo
Project Manager SCURF Review: /� I 6 Dat
V e: -
Project Manager SRF Review: J N Date:
Note: Whenever there is a discrepancy affecting North Carolina compliance samples, a copy of this form will be sent to the Nonh Carolina DEHNR Certification Office {i.e.
Out of hold, Incorrect preservative, out of temp, incorrect containers)
Page 14 of 16

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SP4U-125 mL Plastic Unpreserved (N/A) (Ci-)
BP3U-25O mL Plastic Unpreserved (N/A)
IIPZU-500 mL Plastic Unpreserved (N/A)
BP1U-1 liter Plastic Unpreserved (N/A)
Ix
eP45-125 mL Plaslic H2SO4 (pH < 2) (Cl-)
8P3N-250 mL plastic HNO3 (pH < 2)
BP4Z-125 mL Plastic ZN Acetate & NaOH (>9)
HW-125 mi. Plastic NaOH (pH > 12) (Cl-)
WGFU-wide-mouthed Glass)ar Unpreserved
AG1U-1 liter Amber Unpreserved (N/A) (Cl-)
AG1H-1 liter Amber HCI (pH < 2)
AG3U-250 mLAmber Unpreserved (N/A) (Ct-)
RG1S-1 liter Amber H2SO4 (pH < 2)
AG3S-250 mL Amber H2504 (pH < 2)
AG3A(DG3A)-250 mL Amber NH4CI (N/A)(CI-)
DG9H-40 mL VOA HCI (N/A)
VG9T-40 mi. VOA Na2S203 (N/A)
VG91.11-40 mL VOA Unp (N/A)
DG9P40 ml VOA H3PO4 (N/A)
VOAK (6 vials Per kit)-5035 kit (N/A)
VIGK (3 vials per kit)-VPH/Gas kit (N/A)
SP5T-125 mL SterilePlastic(N/A- lab)
SP2T-250 mL Sterile Plastic (NIA -lab) }
BP3A-250 mL Plastic (NH2)2SO4 (9.3-9.7)
Cubitainer
VSGU-20 mL Scintillation vials (NIA)
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www.a=labs.com
CHAIN -OF -CUSTODY 1 Analytical Request Document
The Chain -of -Custody Is a LEGAL DOCUMENT. All relevant' fields must 1'e completed accurately.
Section A Section 8 Section C
Page. of
Required CCrAnt Inform_31ion: Required Project lnratnratiarx Invoice Infamtation:
e l
L-iC V Report Ta: i i Atlentbn:
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Address: _ -0
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Copy To:
Company Name:
REGULATORY AGENCY
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Addnoias-
- NPDES F GROUND WATER ( DRINKING WATER
i UST i RCRA r OTHER
Emall To:.; -'
Ptxcham Order No-:
ace OUnta
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Site Location
STATE:
Requested Due DaterfAT. Project Nt bw.,
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Requested
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Section D Matrix Cedes
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Important Nato: By Npniry lhia farm yea wo a c gxlty Pam's NET 30 day prya+sm tsmu and ppraelne to !at¢ ammo of 1.6% par mauat -hIn 30 days 1 0 F-ALL-0-020rev.07, 15-May-2007
to

s
STORMWATER DISCHARGE OUTFALL (SDO)
c�
MONITORING REPORT
Permit Number NCS 000304
FACILITY NAME Gerdau Ameristeel US INC- Charlotte
PERSON COLLECTING SAMPLE(S) Ron Holman
CERTIFIED LABORATORY(S) Pace Analytical Lab # 12
Lab #
Part A: Specific Monitoring Requirements
SAMPLES COLLECTED DURING CALENDAR YEAR: 2015
(This monitoring report shall be received by the Division no later than 30 days from
the date the facility receives the sampling results from the laboratory.)
ORDEN
CA.
Cz
COUNTY Mecklenburg
PHONE NO. ( 704 ) 596-0361 0128
SIGNATURE OF PERMITTEE OR DESIGNEE
REQUIRED ON PAGE 2.
Outfall
No.
. Date
Sample
Collected
Total
Rainfall
Oil &
Grease
Total
Suspende
d Solid
SS
pH
Total
Copper
(Cu)
Total
Lead
(Pb)
Total
Nickel
(Ni)
Total
Zinc
(Zn)
Total. �
Alumin
um.
Al
-Total
Cadmium
(Cd)
Total
Chromium
(Cr)
BOD
COD
mo/dd/yr
inches
M
M
Unit
M
M
M911,
M
M
Mg&
M
M
DSN-002
No Discharge
DSN-003
2-9-15
.60
ND
6.0
79
.0112
ND
ND
.0617
.183
ND
.0112
ND
ND
DSN-004
No Discharge
Does this facility perform Vehicle Maintenance Activities using more than 55 gallons of new motor oil per month? _ yes no
(if yes, complete Part B)
Part B: Vehicle Maintenance Activitv Monitorina Requirements
Outfall
No.
Date
Sample
Collected
50050'
00556
00530
00400
Total Flow
(if applicable)
Total
Rainfall
Oil & Grease
(if appL)
Non -polar
O&G/TPH
(Method 1664
SGT-HEM), if
appl.
Total
Suspended
Solids
pH
New Motor
Oil Usage
mo/dd/yr
MG
inches
mzn
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Form SWU-247, last revised 2/2/2012
`T Page 1 of 2

STQI '4ETENT CHARACTERISTICS:
Date 2-9115
Total Event Precipitation (inches): .60
Event Duration (hours): (only if applicable — see permit.)
(if more than one storm event was sampled)
ti Date
Total Event Precipitation (inches):
Event Duration (hours): (only if applicable — see permit.)
s
�l
Mail Original and one copy to:
Division of Water Quality
Attn: Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
"I certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a
system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person
or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the
best of my,knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information,
including the possibility of fines and imp nment for knowing violations."
(Signattfe of Permittee)
1
l
zl /,? 11-5
(Date)
Form SWU-247, last revised 21212012
Page 2 of 2

1!
m GERDAU
February 19, 2015
Division of Water Quality
Surface Water Protection Section
Attention: Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699
RE: DMR's for Storm Water Permit NCS000304
Permitted Facility: Gerdau Ameristeel, US Inc- Charlotte Mill
To Whom It May Concern:
RECEIVEDIDENRUDWR
MAR 0 9 2015
Water QUality
Permitting Section
Please find enclosed signed copies of the Discharge Monitoring Report from the Gerdau Ameristeel US,
Inc- Charlotte Steel Mill during the reporting period that is identified in the permit as semi-annual
monitoring due to the NPDES Permit Renewal Process. These DMR's are part of the on going monthly
Tier Two monitoring requirements established after exceeding the benchmark limits for two consecutive
monitoring periods.
A sample was obtained from storm water discharge outfall DSNO03-0312 during a single storm event on
February 9, 2015, there were no discharge from DSNO02 and DSNO04 outfall. Outfall DSNO03 contains
runoff from the Melt Shop Area, paved road behind the Melt Shop, and storm drains located by Central
Maintenance area. Pollutants in this outfall are created by residual runoff from mobile equipment, raw
materials (Lime or Carbon), Co -Product (Slag), and Billet Yard used to storage billets.
The analytical results showed an exceedance in Copper. These pollutants are currently managed by
vacuum sweeping the road on a daily basis, which is a contracted service. Structural control included
storm water ponds that capture storm water from storm drains located in the area describe above. This
water is captured in the storm water pond to allow particulates suspended in the water to go through the
sedimentation process to minimize particulates if discharge occurs.
Current corrective actions are to continue with existing best management practices. In addiction to the
best management practices, plans are in process to dredge the South Pond to create more volume in the
pond to prevent the moving of water to the North Pond. In addition the improvement South Pond
Improvement, the internal management of transferring water will be modified to only transfer water when
retention ponds is above 75% capacity. The will prevent the potential of a discharge and allow storm
water to complete the sedimentation process in the event a discharge occur. If you have any questions
regarding this DMR report or any other matters related to storm water, please do not hesitate to contact
me directly at [phone], ext 3128.
Sincerely,
Ron Holman
Environmental, Health & Safety Manager
k
4221 W. Boy Scout Boulevard Tampa, FL — 33607 — Phone: [phone] — www.gerdau.com/longsteel
--i

GERDAU
March 13, 2014
Division of Water Quality
Surface Water Protection Section
Attention: Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699
RECEIVED
MAR'27 2414
RE: DMR's for Storm Water Permit ,NCS000304
Permitted Facility: Gerdau Ameristeel, US Inc- Charlotte Mill
To Whom It May Concern:
CENTRAL
ES
DWQIBOG
Please find enclosed signed copies of the Discharge Monitoring Report from the Gerdau Ameristeel US,
Inc- Charlotte Steel Mill during the reporting period Year 5 — Period 3, as specified by No. NCS000304
but can not be used as a discharge event base on the criteria to identify a Storm Event specified in No.
NCS000304. These DMR's are part of the on going monthly Tier Two monitoring requirements
established after exceeding the benchmark limits for two consecutive monitoring periods.
Samples were obtained from storm water discharge outfall DSNO03 due to a Representative from
Mecklenburg County Water Quality requesting to sample one of the outfalls on site. DSNO03-0312
discharged due to the melting of snow and ice from the snow event February 1311'-10. There was no
discharge from DSNO02 and DSNO04 outfall. Outfall DSNO03 contains runoff from the Melt Shop Area,
paved road behind the Melt Shop, and storm drains located by Central Maintenance area. Pollutants in
this outfall are created by residual runoff from mobile equipment, raw materials (Lime or Carbon), Co -
Product (Slag), and Billet Yard used to storage billets.
The analytical results showed an exceedance in Copper and pH. These pollutants are currently managed
by vacuum sweeping the road on a daily basis, which is a contracted service. Structural control included
storm water ponds that capture storm water from storm drains located in the area describe above. This
water is captured in the storm water pond to allow particulates suspended in the water to go through the
sedimentation process to minimize particulates if discharge occurs.
Current corrective actions are to continue with existing best management practices. In addiction to the
best management practices, plans are in process to dredge the South Pond to create more volume in the
pond to prevent the moving of water to the North Pond. The will prevent the potential of a discharge and
allow storm water to complete the sedimentation process in the event a discharge occur. If you have any
questions regarding this DMR report or any other matters related to storm water, please do not hesitate to
contact me directly at [phone], ext 3128
Sincerely,
Ron Holman
Environmental, Health & Safety Manager
4221 W. Boy Scout Boulevard — Tampa, FL — 33607 — Phone: [phone] — www.gerdau. comllongsteel

STORMWATER DISCHARGE OUTFALL (SDO)
MONITORING REPORT
Permit Number NCS 000304
FACILITY NAME Gerdau Ameristeel US, INC- Charlotte
PERSON COLLECTING SAMPLE(S) Ron Holman
CERTIFIED LABORATORY(S) Pace Analytical Lab # 12
Lab #
Part A: Specific Monitoring Requirements
SAMPLES COLLECTED DURING CALENDAR YEAR: 2014
(This monitoring report shall be received by the Division no later than 30 days from
the date the facility receives the sampling results from the laboratory.)
COUNTY Mecklenburg
PHONE NO. ( 704 ) 596-0361 x3128
SIGNATURE OF PERMITTEE OR DESIGNEE
REQUIRED ON PAGE 2.
Outfall::
.a..yfj /'f.3:i �`�?� 7
No : ,�,�:..5am
y '.
.;
p
5 l
Date
9r Y.-r�y�,�
i=ram p leTotal
Collected`
'li n>:�
- ?f`�f^lh
r_;.
w
RainfallGreasez•
{
"F, ,
Oil &:'"Total
.1wru`.'
.s
r/::d:.S011d
n.-,rlX'4
a. i
.Sus "ender
p •� -r
P'
�. �1'�70 'td. F
p H$
.f-
'•i.ru!
',Total
:Co Copper
pp
(`U1rS r�
:Ik Ir ,. -�r.
Total r ce''
Lead��
:,� �..
c
b +.�..
..���1r• .r.e
Total. �:�
rr�
'Ntckel'`7inc
'..} _
Nl
- . r, a
Total°
T".fi
j
Zsl 'w�"
,-.I.,rM i •1. �,.
Total"�'
Alunain;
,UI
7"` 4.P- h'�
.um = ?'!'=.
mP+r. - f a
fT,
Alzf.a
.,Total
'Cadmium'
;�
Cd
A^f
?rX4'f ,.A.
Total ., '
Cliromiutn
q '
Cr
�BOD.�;: ��
y/�_
�. sf/r.��,
�F
COD
-.
mo/ddlNi
tnctes
;1VI11I"
"
Untt,
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M
DSN-002
2/19/14
-
ND
13.1
9.1
.009
ND
ND
.055
.205
ND
.0169
2.3
35
DSN-003
DSN-004
Does this facility perform Vehicle Maintenance Activities using more than 55 gallons of new motor oil per month? _ yes _no
(if yes, complete Part B)
rant ts: ventcte iviamtenance Acttvtty iviomtorme meautrements
Outfall:Date.!..50050
sample
.• ... .
00556 ..'..
00530 .;.;'
`00400 ,
Total Flow ' .
Total
Oil & Grease""'.
Nou-polar
Total
pH
New Motor ,
Collected
(if.applicable) •
Rainfall
(if appl.) .
O&GITPH
Suspended
Oil Usage
(Method 1664
Solids . .
zi
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Form SWU-247, last revised 21212012
Page 1 of 2

STORM EVENT CHARACTERISTICS:
Date _2/19/14
Total Event Precipitation (inches): 0 (Snow Event)
Event Duration (hours): (only if applicable — see permit.)
(if more than one storm event was sampled)
Date
Total Event Precipitation (inches):
Event Duration (hours): (only if applicable — see permit.)
Mail Original and one copy to:
Division of Water Quality
Attn: Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
"I certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a
system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person
or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the
best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information,
including the possibility of fines and iWrjso,Zment for knowing violations."
71�
Permittee)
J/ 4� 1
(Date)
Form S WU-247, last revised 21212012
Page 2 of 2