NCS000379_Monitoring Results_20230720

r4 u C C3 Me NUCOR STEEL HERTFORD
1505 River Road
Cofield, NC 27922
252.356.3700
July 14, 2023
NCDEQ
Water Quality Section
Attn: Central Files
1617 Mail Service Center
Raleigh, NC 27699-1617
Reference: NPDES Storm Water Permit#: NCS000379
Attn: Central Files
Attached you will find a Stormwater Discharge Monitoring Report (DMR) for our Stormwater
Discharge Outfall (SDO) for ponds Al, A3, B1 and C1.
The total flows for each of these ponds were calculated using 100 percent runoff for the drainage
basins and are therefore over estimated due to infiltration.
If you should have any questions, please contact me at [phone].
Sincerely,
z�
Molly Miller
Environmental Engineer
RECEIVED
JUL 2 0 Z .
TMLR-Starmwater RrograM
www.nucor.com

STORMWATER DISCHARGE OUTFALL (SDO)
QUALITATIVE MONITORING REPORT
Certificate of Coverage No. NCS 000379
Facility Name: Nucor Steel
County: Hertford Phone No. [phone]
Inspector Michael Sitarski
Date of Inspection: 5/17/2023
Time of Inspection: 10:15:00 AM
Was this a"Measurable Storm Event'as defined by the permit? Yes
By this signature, I certify that this report is accurate and complete to the best of my
knowledge: 06 !,A
ex,
(Signature of Permittee orDesignee)
1.Outfall Description
Outfall No. Al Structure(pipe,ditch,etc.): Pipe
Receiving Stream: Onsite wetland eventually leading to Chowan River
Describe the industrial activities that occur within the outfall drainage area:
Scrap Movements via Truck and Rail, Light Vehicular Traffic,Slag Processing
2.Color
Describe the color of the discharge using basic colors(red,brown, blue,etc.)and tint
(light, medium,dark)as descriptors:
Blue
3.Odor
Describe any distinct odors that the discharge may have(i.e.smells strongly of oil,weak
chlorine odor,etc.):
N/A
4.Clarity
Choose the number which best describes the clarity of the discharge,where 1 is clear&5 is cloudy.
N/A 1 2 3 4 5
5.Floating Solids
Choose the number which best describes the amount of floating solids in the stormwater discharge,
where 1 is no solids&5 is the surface covered with floating solids.
N/A 1 2 3 4 5
6.Suspended Solids
Choose the number which best describes the amount of suspended solids in the stormwater discharge,
where 1 is no solids and 5 is extremely muddy.
N/A 1 2 3 4 5
7.Foam
Is there any foam in the stormwater discharge? Yes No N/A
8.Oil Sheen
Is there an oil sheen in the stormwater discharge? Yes No N/A
9.Erosion/Deposition
Is there evidence of erosion or deposition at the outfall? Yes No N/A
10.Other Obvious Indicators of Stormwater Pollution

STORM EVENT CHARACTERISTICS: Mail Original and one copy to:
Division of Water Quality
Date 5/17/2023 Attn: Central Files
Total Event Precipitation (inches): 0.51 1617 Mail Service Center
Event Duration (hours): 24 Raleigh, North Carolina 27699-1617
(if more than one storm event was sampled)
Date
Total Event Precipitation (inches):
Event Duration (hours):
"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 possiblity of fines and imprisonment for knowing violations."
La"r,t�. I �/
(Signature of Permitte (Dat )

STORMWATER DISCHARGE OUTFALL(SDO)
MONITORING REPORT
Pemit Number NCS NCS000379 SAMPLES COLLECTED DURING CALENDAR YEAR: 2023
(This monitoring report shall be received by the Division no later than 30 days from
the date the facility receives the samples results from the laboratory.)
FACILITY NAME Nucor Steel COUNTY Hertford
PERSON COLLECTING SAMPLE(S) Michael Sitarski PHONE NO. [phone]
CERTIFIED LABORATORY(S) Environmental Chemists,Inc. Lab#: 22-56852
(SIGNATURE OF PERMITEE OR DESIGNEE)
By this signature,I certify that this report is accurate
complete to the best of my knowledge.
Part A: Specific Monitoring Requirements
50050
Outfall No. Date Sample
Collected Total Flow pH O&G COD TSS NO2&NO, Total P Lead
mo/dd r MG m /I m /I m /I m /I m /I m /I
Al 05/17/23 7.59 <5.0 27 14.5 <0.02 0.52 <0.01
Does this facility perform Vehicle Maintenance Activities using more than 55 gallons of new motor oil per month? _X_yes _n©
(if yes,complete Part B)
Part B:Vehicle Maintenance Activity Monitoring Requirements
50050
Outfall No. Date Sample Oil and Total New Motor Oil
Collected Total Flow Grease Suspended pH Usage
Solids g
mo/dd/ r MG m /I mg/1 m /I gal
Al 05/17/23 2.26 <5.0 14.5 7.59 338

STORMWATER DISCHARGE OUTFALL (SDO)
MONITORING REPORT
Pemit Number NCS NCS000379 SAMPLES COLLECTED DURING CALENDAR YEAR: 2023
(This monitoring report shall be received by the Division no later than 30 days from
the date the facility receives the samples results from the laboratory.)
FACILITY NAME Nucor Steel COJNTY Hertford
PERSON COLLECTING SAMPLE(S) Michael Sitarski PHONE NO. [phone]
CERTIFIED LABORATORY(S)Environmental Chemists, Inc. Lab* 22-56852
(SIGNATURE OF PERMITEE OR DESIGNEE)
By:his signature, I certify that this report is accurate
complete to the best of my knowledge.
Part A: Specific Monitoring Requirements
Outfall Date Sample 50050
No. Collected Total Flow Zinc Magnessium Copper Mercury Antimony
mo/dd/ r MG m /I m /I m /I m /I m /I
Al 05/17/23 2.26 <0.01 5.58 <0.01 0.000014500 <0.01
Does this facility perform Vehicle Maintenance Activities using more than 55 gallons of new motor oil per month? _X_yes _no
(if yes,complete Part B)
Part B:Vehicle Maintenance Activity Monitoring Requirements
50050
Outfall Date Sample Oil and Total New Motor Oil
No. Collected Total Flow Grease Suspended pH Usage
Solids g
mo/dd/ r MG m /I m /I m /I gal
Al 05/17/23 2.26 <5.0 14.5 7.59 338

STORMWATER DISCHARGE OUTFALL (SDO)
QUALITATIVE MONITORING REPORT
Certificate of Coverage No. NCS 000379
Facility Name: Nucor Steel
County: Hertford Phone No.:[phone]
Inspector Michael Sitarski
Date of Inspection: 5/17/2023
Time of Inspection: 10:45:00 AM
Was this a"Measurable Storm Event'as defined by the permit? Yes
By this signature, I certify that this report is accurate and complete to the best of my
knowledge:
(Signatur of Permittee r Designee)
1.Outfall Description
Outfall No. B1 Structure(pipe,ditch,etc.): Pipe
Receiving Stream: Onsite wetland eventually leading to Chowan River
Describe the industrial activities that occur within the outfall drainage area:
Scrap Movements via Truck and Rail, Light Vehicular Traffic,Slag Processing
2.Color
Describe the color of the discharge using basic colors(red, brown,blue,etc.)and tint
(light, medium, dark)as descriptors:
Light Blue
3.Odor
Describe any distinct odors that the discharge may have(i.e. smells strongly of oil,weak
chlorine odor,etc.):
NA
4.Clarity
Choose the number which best describes the clarity of the discharge,where 1 is clear&5 is cloudy.
1 2 3 4 5
5.Floating Solids
Choose the number which best describes the amount of floating solids in the stormwater discharge,
where 1 is no solids&5 is the surface covered with floating solids.
1 2 3 4 5
6.Suspended Solids
Choose the number which best describes the amount of suspended solids in the stormwater discharge,
where 1 is no solids and 5 is extremely muddy.
1 2 3 4 5
7.Foam
Is there any foam in the stormwater discharge? Yes No
8.Oil Sheen
Is there an oil sheen in the stormwater discharge? Yes No
9.Erosion/Deposition
Is there evidence of erosion or deposition at the outfall? Yes No
10.Other Obvious Indicators of Stormwater Pollution

STORM EVENT CHARACTERISTICS: Mail Original and one copy to:
Division of Water Quality
Date 5/17/2023 Attn: Central Files
Total Event Precipitation (inches): 0.51 1617 Mail Service Center
Event Duration (hours): 24 Raleigh, North Carolina 27699-1617
(if more than one storm event was sampled)
Date
Total Event Precipitation (inches):
Event Duration (hours):
"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 possiblity of fines and imprisonment for knowing violations."
L�� 11 J/�� 7 � ly 23
(Signature of Permittee) (Date)

STORMWATER DISCHARGE OUTFALL(SDO)
MONITORING REPORT
Pemit Number NCS NCS000379 SAMPLES COLLECTED DURING CALENDAR YEAR: 2023
(This monitoring report shall be received by the Division no later than 30 days from
the date the facility receives the samples results from the laboratory.)
FACILITY NAME Nucor Steel COUNTY Hertford
PERSON COLLECTING SAMPLE(S) Michael Sitarski PHONE NO. [phone]
CERTIFIED LABORATORY(S) Environmental Chemists,Inc. Lab#: 22-56853
(SIGNATURE OF PERMITEE OR DESIGNEE)
By this signature,I certify that this report is accurate
complete to the best of my knowledge.
Part A: Specific Monitoring Requirements
50050
Outfall No. Date Sample
Collected Total Flow pH O&G COD TSS NO2&NO3 Total P Lead
mo/dd/ MG m /I m /I m /I m /I m /I mg/1
131 05/17/23 2.381808528 7.98 <5 22 2.7 <0.02 0.06 <0.01
Does this facility perform Vehicle Maintenance Activities using more than 55 gallons of new motor oil per month? --A—yes _no
(if yes,complete Part B)
Part B:Vehicle Maintenance Activity Monitoring Requirements
50050
Outfall No. Date Sample Oil and Total New Motor Oil
Collected Total Flow Grease Suspended pH Usage
Solids g
mo/dd/ r MG m /I m /I m /I gal
B1 05/17/23 2.381808528 <5 2.7 7.98 338

STORMWATER DISCHARGE OUTFALL (SDO)
MONITORING REPORT
Pemit Number NCS NCS000379 SAMPLES COLLECTED DURING CALENDAR YEAR: 2023
(This monitoring report shall be received by the Division no later than 30 days from
the date the facility receives the samples results from the laboratory.)
FACILITY NAME Nucor Steel COUNTY Hertford
PERSON COLLECTING SAMPLE(S) Michael Sitarski PHONE NO. [phone]
CERTIFIED LABORATORY(S)Environmental Chemists, Inc. Lab#: 22-56853
(SIGNATURE OF PERMITEE OR DESIGNEE)
By this signature, I certify that this report is accurate
complete to the best of my knowledge.
Part A: Specific Monitoring Requirements
Outfall Date Sample 50050
No. Collected Total Flow Zinc Magnessium Copper Mercury Antimony
mo/dd/ r MG m /I m /I m /I m /I m /I
B1 05/17/23 2.381808528 0.011 4.51 <0.01 0.000001940 <0.01
Does this facility perform Vehicle Maintenance Activities using more than 55 gallons of new motor oil per month? --A—yes _no
(if yes,complete Part B)
Part B:Vehicle Maintenance Activity Monitoring Requirements
50050
Outfall Date Sample Oil and Total New Motor Oil
No. Collected Total Flow Grease Suspended pH Usage
Solids g
mo/dd/ r MG m /I m /I m /I gal
131 05/17/23 2.381808528 <5 2.7 7.98 338

STORMWATER DISCHARGE OUTFALL (SDO)
QUALITATIVE MONITORING REPORT
Certificate of Coverage No. NCS 000379
Facility Name: Nucor Steel
County: Hertford Phone No. [phone]
Inspector Michael Sitarski
Date of Inspection: 5/17/2023
Time of Inspection: 11:00
Was this a"Measurable Storm Event"as defined by the permit? Yes
By this signature, I certify that this report is accurate and complete to the best of my
knowledge:
(Signatur of ermittee or Designee)
1.Outfall Description
Outfall No. C1 Structure(pipe, ditch,etc.): Pipe
Receiving Stream: Onsite wetland eventually leading to Chowan River
Describe the industrial activities that occur within the outfall drainage area:
Scrap Movements via Truck and Rail, Light Vehicular Traffic, Slag Processing
2.Color
Describe the color of the discharge using basic colors(red,brown,blue,etc.)and tint
(light, medium, dark)as descriptors:
Blue-Green
3.Odor
Describe any distinct odors that the discharge may have(i.e. smells strongly of oil,weak
chlorine odor,etc.):
NA
4.Clarity
Choose the number which best describes the clarity of the discharge,where 1 is clear&5 is cloudy.
1 2 3 4 5
5.Floating Solids
Choose the number which best describes the amount of floating solids in the stormwater discharge,
where 1 is no solids&5 is the surface covered with floating solids.
1 2 3 4 5
6.Suspended Solids
Choose the number which best describes the amount of suspended solids in the stormwater discharge,
where 1 is no solids and 5 is extremely muddy.
1 2 3 4 5
7.Foam
Is there any foam in the stormwater discharge? Yes No
8.Oil Sheen
Is there an oil sheen in the stormwater discharge? Yes No
9.Erosion/Deposition
Is there evidence of erosion or deposition at the outfall? Yes No
10.Other Obvious Indicators of Stormwater Pollution

STORM EVENT CHARACTERISTICS: Mail Original and one copy to:
Division of Water Quality
Date 5/17/2023 Attn: Central Files
Total Event Precipitation (inches): 0.51 1617 Mail Service Center
Event Duration (hours): 24 Raleigh, North Carolina 27699-1617
(if more than one storm event was sampled)
Date
Total Event Precipitation (inches):
Event Duration (hours):
"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 possiblity of fines and imprisonment for knowing violations."
(Signature of Permittee)/ (Date)

STORMWATER DISCHARGE OUTFALL(SDO)
MONITORING REPORT
Pemit Number NCS NCS000379 SAMPLES COLLECTED DURING CALENDAR YEAR: 2023
(This monitoring report shall be received by the Division no later than 30 days from
the date the facility receives the samples results from the laboratory.)
FACILITY NAME Nucor Steel COUNTY Hertford
PERSON COLLECTING SAMPLE(S) Michael Sitarski PHONE NO. [phone]
CERTIFIED LABORATORY(S) Environmental Chemists,Inc. Lab#: 22-56854
(SIGNATURE OF PERMITEE OR DESIGNEE)
By this signature,I certify that this report is accurate
complete to the best of my knowledge.
Part A: Specific Monitoring Requirements
50050
Outfall No. Date Sample
Collected Total Flow pH O&G COD TSS NO,&NO, Total P Lead
mo/dd/ r MG m /I m /I m /I m /I m /I m /I
C1 05/17/23 1.218599712 8.2 <5.0 <20 8.3 0.04 0.58 <0.01
Does this facility perform Vehicle Maintenance Activities using more than 55 gallons of new motor oil per month? _X_yes _no
(if yes,complete Part B)
Part B:Vehicle Maintenance Activity Monitoring Requirements
50050
Outfall No. Date Sample Oil and Total New Motor Oil
Collected Total Flow Grease Suspended pH Usage
Solids g
mo/dd/ r MG m /I m /I m /I gal
C1 05/17/23 1.218599712 <5.0 8.3 8.2 338

STORMWATER DISCHARGE OUTFALL (SDO)
MONITORING REPORT
Pemit Number NCS NCS000379 SAMPLES COLLECTED DURING CALENDAR YEAR: 2023
(This monitoring report shall be received by the Division no later than 30 days from
the date the facility receives the samples results from the laboratory.)
FACILITY NAME Nucor Steel COUNTY Hertford
PERSON COLLECTING SAMPLE(S) Michael Sitarski PHONE NO. [phone]
CERTIFIED LABORATORY(S)Environmental Chemists, Inc. Lab#: 22-56854
(SIGNATURE OF PERMITEE OR DESIGNEE)
By the signature, I certify that this report is accurate
complete to the best of my knowledge.
Part A: Specific Monitoring Requirements
Outfall Date Sample 50050
No. Collected Total Flow Zinc Magnessium Copper Mercury Antimony
mo/dd/ r MG m /I m /I m /I m /I m /I
C1 05/17/23 1.218599712 <0.01 3.19 <0.1 0.000003420 <0.01
Does this facility perform Vehicle Maintenance Activities using more than 55 gallons of new motor oil per month? _X_yes _no
(if yes,complete Part B)
Part B:Vehicle Maintenance Activity Monitoring Requirements
50050
Outfall Date Sample Oil and Total New Motor Oil
No. Collected Total Flow Grease Suspended pH Usage
Solids
mo/dd/ r MG m /I m /I m /I gal
C1 05/17/23 1.218599712 <5.0 8.3 8.2 338

STORMWATER DISCHARGE OUTFALL (SDO)
QUALITATIVE MONITORING REPORT
Certificate of Coverage No. NCS 000379
Facility Name: Nucor Steel
County: Hertford Phone No. [phone]
Inspector Michael Sitarski
Date of Inspection: 5/17/2023
Time of Inspection: 10:30:00 AM
Was this a"Measurable Storm Event'as defined by the permit? NO
By this signature, I certify that this re ort is accurate and complete to the best of my
knowledge:
(Signature Q#rPermittee or Designee)
1.Outfall Description
Outfall No. A3 Structure(pipe,ditch,etc.): Pipe
Receiving Stream: Onsite wetland eventually leading to Chowan River
Describe the industrial activities that occur within the outfall drainage area:
Scrap Movements via Truck and Rail, Light Vehicular Traffic, Slag Processing
2.Color
Describe the color of the discharge using basic colors(red,brown, blue,etc.)and tint
(light, medium,dark)as descriptors:
Light Blue
3.Odor
Describe any distinct odors that the discharge may have(i.e.smells strongly of oil,weak
chlorine odor,etc.):
N/A
4.Clarity
Choose the number which best describes the clarity of the discharge,where 1 is clear&5 is cloudy.
N/A 1 2 3 4 5
5.Floating Solids
Choose the number which best describes the amount of floating solids in the stormwater discharge,
where 1 is no solids&5 is the surface covered with floating solids.
N/A 1 2 3 4 5
6.Suspended Solids
Choose the number which best describes the amount of suspended solids in the stormwater discharge,
where 1 is no solids and 5 is extremely muddy.
N/A 1 2 3 4 5
7.Foam
Is there any foam in the stormwater discharge? Yes No N/A
8.Oil Sheen
Is there an oil sheen in the stormwater discharge? Yes No N/A
9.Erosion/Deposition
Is there evidence of erosion or deposition at the outfall? Yes No N/A
10.Other Obvious Indicators of Stormwater Pollution

STORM EVENT CHARACTERISTICS: Mail Original and one copy to:
Division of Water Quality
Date 5/17/2023 Attn: Central Files
Total Event Precipitation (inches): 0.51 1617 Mail Service Center
Event Duration (hours): 24 Raleigh, North Carolina 27699-1617
(if more than one storm event was sampled)
Date
Total Event Precipitation (inches):
Event Duration (hours):
"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 possiblity of fines and imprisonment for knowing violations."
L 6 — � I
(Signature of Permittee) (Date)