NCG200521_MONITORING INFO_20190514

m ul
STORMWATER DIVISION CODING SHEET
NCG PERMITS
PERMIT NO.
V C� Qoo
DOC TYPE
❑HISTORICAL FILE
MONITORING REPORTS
DOC DATE
❑ @00 D
YYYYMMDD

Keywell Metals
Aerospace and Speviahy Steel R ecr-&V
May 6, 2019
Division of Water Resources
Attn: DWR Central Files
1617 Mail Service Center
Raleigh, NC 27699-1617
Re: Storm Water Discharge Monitoring Report — April Tiered Response Monitoring
Keywell Metals, L.L.C.
1035 Commercial Drive, Matthews, Union County, NC 28104
Certificate of Coverage Number NCG200521
Dear Sir/Madam:
Keywell Metals, L.L.C. as referenced and in accordance with the National Pollution Discharge Elimination
System (NPDES) General Permit, is submitting two copies of our February 2019 Tiered Response Discharge
Monitoring Report (DMR).
Keywell Metals collected samples for the analysis of Copper and Zinc. The laboratory analytical report
indicated a concentration of copper exceeding the BMV and a concentration of zinc that was below the
BMV. Keywell Metals will continue to monitor monthly under the tiered response requirements upon the
next qualifying storm event.
If you have any questions or concerns, please feel free to contact me at [phone], or our
environmental consultant, Rob Duffy of Antea Group at [phone].
Sincerely,
Dan Buwalda
Keywell Metals, L.L.C.
Director of Aerospace Operations
Attachment

Semi-annual Stormwater Discharge Monitoring Report DMR
for North Carolina DEMLR General Permit No. NCG200000 — Scrap Metal Recycling
Date submitted May 3, 2019
CERTIFICATE OF COVERAGE NO. NCG20 0 5 2 1
FACILITY NAME Keywell Metals, LLC - Matthews
COUNTY Union
PERSON COLLECTING SAMPLES Tony Tyson
LABORATORY Prism Labs, Inc. Lab Cert. # 402
Comments on sample collection or analysis:
Part A: Stormwater Benchmarks and Monitoring Results
SAMPLE COLLECTION YEAR 2019
SAMPLE PERIOD ❑ Jan -June ❑ July -Dec
or ❑■ Monthly' April (month)
DISCHARGING TO CLASS ❑ORW ❑HQW ❑Trout ❑PNA
❑Zero -flow ❑Water Supply [:]SA
❑Saltwater *Other Nv Csw
PLEASE REMEMBER TO SIGN ON THE REVERSE 4
No discharge this period?z
Outfall No.
Date Sample
Collected'
(mo/dd/yr)
24-hour rainfall
amount,
Inches3
Total Suspended
Solids
Chemical Oxygen
Demand
Non -polar oil & grease
EPA Method 1664
(SGT-HEM)
Copper,
Total
Lead,
Total
Zinc,
Total
Benchmarks ==>
-
-
100 mg/L or
50 mg/L'
120 mg/L
15 mg/L
0.010 mg/L or
0.005 mg/L$
0.075 mg/L or
0.210 mg/Ls
0.126 mg/L or
0.090 mg/L5
OF001
4/5/2019
1.18 inches
0.014 mg1L
0.059 mg/L
' Monthly sampling (instead of semi-annual) must begin with the second consecutive benchmark exceedance for the same parameter at the same outfall.
Z For sampling periods with no discharge at any single outfall, you must still submit this discharge monitoring report with a checkmark here.
3The total precipitation must be recorded using data from an on -site rain gauge. Unattended sites may be eligible for a waiver of the rain gauge requirement.
4 See General Permit text, Table 3 or Table 4, identifying protected receiving water classifications where the more protective TSS benchmark applies.
5 Stormwater discharges into receiving waters classified as saltwater are subject to the second listed benchmark_
Note: Results must be reported in numerical format. For example, do not report Below Detection Limit, BDL, <PQL, Non -detect, ND, or other similar non -
numerical format. When results are below the applicable limits, they must be reported in the format, "<XX mg/L" where XX is the numerical value of the
detection limit, reporting limit, quantitation limit, etc. in mg/L.
Note: if you report a sample value in excess of the benchmark, you must implement Tier 1, Tier 2, or Tier 3 responses. See General Permit.
Permit Date: 02/02/2015-12/31/2019 SWU-256, last revised 1/28/2015
Page 1 of 2

Part B: Vehicle Maintenance Area Monitoring Results: only for facilities averaging > 55 gal of new oil per month.
❑ No dischorge this period?z
Outfall No.
Date Sample
Collected'
(mo/dd/yr)
24-hour rainfall
amount,
Inches
Non -polar O&G by EPA
1664 (SGT-HEM)
Total Suspended Solids
Benchmarks =__>
_
-
15 mg/L
100 mg/L or So mg/L
Footnotes from Part A also apply to this Part B '
Note: If you report a sample value in excess of the benchmark, you must implement Tier 1, Tier 2, or Tier 3 responses. See General Permit.
FOR PART A AND PART B MONITORING RESULTS:
• A SINGLE BENCHMARK EXCEEDANCE TRIGGERS TIER 1 REQUIREMENTS.
• 2 EXCEEDANCES IN A ROW FOR THE SAME PARAMETER AT THE SAME OUTFALL TRIGGER TIER 2 REQUIREMENTS.
+ TIER 3: HAS YOUR FACILITY HAD 4 OR MORE BENCHMARK EXCEEDANCES FOR THE SAME PARAMETER AT ANY ONE OUTFALL? YES ❑ NO ❑■
IF YES, HAVE YOU CONTACTED THE DEMLR PEGIONAL OFFICE AS REQUIRED BY THE PERMIT? YES ❑ NO ❑
REGIONAL OFFICE CONTACT NAME:
Mail an original and one copy of this DMR, including aff "No Discharge" reports, within 30 days of receipt of the lab results (or at end of monitoring period
in the case of "No Discharge" reports) to:
Division of Water Resources
Attn: DWR Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
YOU MUST SIGN THIS CERTIFICATION FOR ANY INFORMATION REPORTED:
"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."
J
-/< I ( � '
(D e)
Permit Date: 02/02/2015-12/31/2019 SWU-256, last revised 1/29/2015
Page 2of2

April 1, 2019
Division of Water Resources
Attn: DWR Central files
1617 Mail Service Center
Raleigh, NC 27699-1617
Keywell Metals
Affospwe and Spec;arey sum+ R
RECF:I ED
APR 0 5 2019
0�1
Re: Storm Water Discharge Monitoring Report — Tiered Response Monitoring Event
Keywell Metals, L.L.C.
1035 Commercial Drive, Matthews, Union County, NC 28104
Certificate of Coverage Number NCG200521
Dear Sir/Madam:
Keywell Metals, L.L.C. as referenced and in accordance with the National Pollution Discharge Elimination
System (NPDES) General Permit, is submitting two copies of our March 2019 Tiered Response Discharge
Monitoring Report (DMR).
There was either no appreciable flow or unsafe conditions existed which prevented sample collection
during the month of March. Tiered response monitoring will continue upon the next qualifying rainfall
event.
If you have any questions or concerns, please feel free to contact me at [phone], or our
environmental consultant, Rob Duffy of Antea Group at [phone].
Sincerely,
Dan Buwalda
Keywell Metals, L.L.C.
Director of Aerospace Operations
Attachment

Semi-annual Stormwater Discharge Monitoring Report DMR)
for North Carolina DEMLR General Permit No. NCG200000 — Scrap Metal Recycling
Date submitted March 26. 2019
CERTIFICATE OF COVERAGE NO. NCG20 0 5 2 1
FACILITY NAME Keyweir Metals, u-c; - Matthews
COUNTY Union
PERSON COLLECTING SAMPLES
LABORATORY Prism Labs, Inc. Lab Cert. ## 402
Comments on sample collection or analysis:
Part A: Stormwater Benchmarks and Monitoring Results
SAMPLE COLLECTION YEAR 2019
SAMPLE PERIOD ❑ Jan -June ❑ July -Dec
or *monthly' March (month)
DISCHARGING TO CLASS ❑ORW ❑HQW ❑Trout ❑PNA
[_]zero -flow ❑Water Supply ❑SA
❑Saltwater Mother N,csw
PLEASE REMEMBER TO SIGN ON THE REVERSE 4
❑■ No discharge this period?2
Outfall No.
Date Sample
Collected
(mo/dd/yr)
24-hour rainfall
amount,
Inches3
Total Suspended
Solids
Chemical Oxygen
Demand
Non -polar oil & grease
EPA Method 1664
(SGT-HEM)
Copper,
Total
Lead,
Total
Zinc,
Total
Benchmarks
100 mg/L or
50 mg/L°
120 mg/L
15 mg/L
0.010 mg/L or
0.005 mg/L5
0.075 mg/L or
0.210 mg/L5
0.126 mg/L or
0.090 mg/L5
' Monthly sampling (instead of semi-annual) must, begin with the second consecutive benchmark exceedance for the same parameter at the same outfall.
z For sampling periods with no discharge at any single outfall, you must still submit this discharge monitoring report with a checkmark here.
3The total precipitation must be recorded using data from an on -site rain gauge. Unattended sites may be eligible for a waiver of the rain gauge requirement.
° See General Permit text, Table 3 or Table 4, identifying protected receiving water classifications where the more protective TSS benchmark applies.
5 Stormwater discharges into receiving waters classified as saltwater are subject to the second listed benchmark.
Note: Results must be reported in numerical format. For example, do not report Below Detection Limit, BDL, <PQL, Non -detect, ND, or other similar non -
numerical format. When results are below the applicable limits, they must be reported in the format, "<XX mg/L", where XX is the numerical value of the
detection limit, reporting limit, quantitation limit, etc. in mg/L.
Note: If you report a sample value in excess of the benchmark, you must implement Tier 1, Tier 2, or Tier 3 responses. See General Permit.
Permit Date: 02/02/2015-12/31/2019 SWU-256, last revised 1/28/2015
Page 1 of 2

Part B: Vehicle Maintenance Area Monitoring Results: only for facilities averaging > 55 gal of new oil per month.
❑ No discharge this period?z
Outfall No.
Date Sample
Collected'
(mo/dd/yr)
24-hour rainfall
amount,
Inches3
Non -polar O&G by EPA
1664 (SGT-HEM)
Total Suspended Solids
Benchmarks =__>
_
-
15 mg/L
100 mg/L or 50 mg/L
Footnotes from Part A also apply to this Part B
Note: If you report a sample value in excess of the benchmark, you must implement Tier 1, Tier 2, or Tier 3 responses. See General Permit.
FOR PART AND PART B MONITORING RESULTS:
• A SINGLE BENCHMARK EXCEFDANCE TRIGGERS TIER 1 REQUIREMENTS.
• 2 EXCEEDANCES IN A ROW FOR THE SAME PARAMETER AT THE SAME OUTFALL TRIGGER TIER 2 REQUIREMENTS_
• TIER 3: HAS YOUR FACILITY HAD 4 OR MORE BENCHMARK EXCEEDANCES FOR THE SAME PARAMETER AT ANY ONE OUTFALL? YES ❑ NO ❑
IF YES, HAVE YOU CONTACTED THE DEMLR REGIONAL OFFICE AS REQUIRED BY THE PERMIT? YES ❑ NO ❑
REGIONAL OFFICE CONTACT NAME:
Mail an original and one copy of this DMR, including all "No Discharge" reports, within 30 days of receipt of the lab results for at end of monitoring period
in the case of "No Discharge" reports:
Division of Water Resources
Attn: DWR Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
YOU MUST SIGN THIS CERTIFICATION FOR ANY INFORMATION REPORTED:
"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."
Z4 // //(?
(Date)
Permit Date:02/02/2015-12/31/2019
SWU-256, last revised 1/28/2015
Page 2 of 2

April 1, 2019
Division of Water Resources
Attn: DWR Central Files
1617 Mail Service Center
Raleigh, NC 27699-1617
Keywell Metals
Aczospwe and Spey Seeel Reeyefing
RCCEI ED
APR 0 5 2019
GE,','TFRAL FILL
�C'r
Re: Storm Water Discharge Monitoring Report —Tiered Response Monitoring Event
Keywell Metals, L.L.C.
1035 Commercial Drive, Matthews, Union County, NC 28104
Certificate of Coverage Number NCG200521
Dear Sir/Madam:
Keywell Metals, L.L.C. as referenced and in accordance with the National Pollution Discharge Elimination
System (NPDES) General Permit, is submitting two copies of our February 2019 Tiered Response Discharge
Monitoring Report (DMR).
None of the following pollutants sampled pollutants exhibited exceedances of the BMVs during this
monitoring event: Tctal Suspended Solids, Zinc, and Copper.
If you have any questions or concerns, please feel free to contact me at [phone], or our
environmental consultant, Rob Duffy of Antea Group at [phone].
Sincerely,
Dan Buwalda
Keywell Metals, L.L.C.
Director of Aerospace Operations
Attachment

Semi-annual Stormwater Discharge Monitoring Report DMR
for North Carolina DEMLR General Permit No. NCG200000 — Scrap Metal Recycling
Date submitted March 26, 2019
CERTIFICATE OF COVERAGE NO. NCG20 O 5 2 1
FACILITY NAME Keywell Metals, LLG -Matthews
COUNTY Union
PERSON COLLECTING SAMPLES Tony Tyson
LABORATORY Prism Labs, Inc. Lab Cert. # 402
Comments on sample collection or analysis:
Part A: Stormwater Benchmarks and Monitoring Results
SAMPLE COLLECTION YEAR 2019
SAMPLE PERIOD ❑ Jan -June ❑ July -Dec
or 0 Monthly' Februa month
DISCHARGING TO CLASS ❑ORW ❑HQW ❑Trout ❑PNA
❑Zero -flow [:)WaterSupply ❑SA
❑Saltwater Mother N:csw
PLEASE REMEMBER TO SIGN ON THE REVERSE --)
❑ No discharge this period?2
Outfall No.
Date Sample
Collected
(mo/dd/yr)
24-hour rainfall
amount,
Inches3
Total Suspended
Solids
Chemical Oxygen
Demand
Non -polar oil & grease
EPA Method 1664
(SGT-HEM)
Copper,
Total
Lead,
Total
Zinc,
Total
Benchmarks =_>
_
100 mg/L or
50 mg/L4
120 mg/L
15 mg/L
0-010 mg/L or
0.005 mg/L5
0.075 mg/L or
0.210 mg/L'
0.126 mg/L or
0.090 mg/Ls
OF001
2/12/2019
0.59 inches
12 mg/L
<0.010 mg/L
<0.030 mg/L
' Monthly sampling (instead of semi-annual) must begin with the second consecutive benchmark exceedance for the same parameter at the same outfall.
2 For sampling periods with no discharge at any single outfall, you must still submit this discharge monitoring report with a checkmark here.
3The total precipitation must be recorded using data from an on -site rain gauge. unattended sites may be eligible for a waiver of the rain gauge requirement.
4 See General Permit text, Table 3 or Table 4, identifying protected receiving water classifications where the more protective TSS benchmark applies.
s Stormwater discharges into receiving waters classified as saltwater are subject to the second listed benchmark.
Note: Results must be reported in numerical format. For example, do not report Below Detection Limit, BDL, <PQL, Non -detect, ND, or other similar non -
numerical format. When results are below the applicable limits, they must be reported in the format, "<XX mg/L where XX is the numerical value of the
detection limit, reporting limit, quantitation limit, etc. in mg/L.
Note: if you report a_ sample value in excess of the benchmark, you must implement Tier 1, Tier 2, or Tier 3 responses. See General Permit.
Permit Date: 02/02/2015-12/31/2019 SWU-256, last revised 1/28/2015
Page 1 of 2

Part B: Vehicle Maintenance Area Monitoring Results: only for facilities averaging > S5 gal of new oil per month.
❑ No discharge this period?Z
Outfall No.
Date Sample
Collected'
(mo/dd/yr)
24-hour rainfall
amount,
Inches3
Non -polar O&G by EPA
1664 (SGT-HEM)
Total Suspended Solids
Benchmarks ===>
-
-
15 mg/L
100 mg/L or 50 mg/L
Footnotes from Part A also apply to this Part B
Note: If you report a sample value in excess of the benchmark, you must implement Tier 1, Tier 2, or Tier 3 responses. See General Permit.
FOR PART A AND PART B MONITORING RESULTS:
• A SINGLE BENCHMARK EXCEEDANCE TRIGGERS TIER 1 REQUIREMENTS.
• 2 EXCEEDANCES IN A ROW FOR THE SAME PARAMETER AT THE SAME OUTFALL TRIGGER TIER 2 REQUIREMENTS.
• TIER 3: HAS YOUR FACILITY HAD 4 OR MORE BENCHMARK EXCEEDANCES FOR THE SAME PARAMETER AT ANY ONE OUTFALL? YES ❑ NO
IF YES, HAVE YOU CONTACTED THE DEMLR REGIONAL OFFICE AS REQUIRED BY THE PERMIT? YES ❑ NO
REGIONAL OFFICE CONTACT NAME:
Mail an original and one coov of this DMR, includina all "No Discharae" reports. within 30 days of receipt of the lab results for at end of monitoring period
in the case of "No Discharae" reports) to:
Division of Water Resources
Attn: DWR Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
YOU MUST SIGN THIS CERTIFICATION FOR ANY INFORMATION REPORTED:
"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."
Z/// A0
(1)te}
Permit Date: 02/02/2015-12/31/2019 SWU-256, last revised 1/28/2015
Page 2 of 2

Keywell Metals
Amospace and Specialty Steel Recycl rg
January 25, 2019
Division of Water Resources
Attn: DWR Central Files
1617 Mail Service Center
Raleigh, NC 27699-1617
Re: Storm Water Discharge Monitoring Report — 1st Half 2018 Monitoring Event
Keywell Metals, L.L.C.
1035 Commercial Drive, Matthews, Union County, NC 28104
Certificate of Coverage Number NCG200521
Dear Sir/Madam:
Keywell Metals, L.L.C. as referenced and in accordance with the National Pollution Discharge Elimination
System (NPDES) General Permit, is submitting two copies of our December 2018 Tiered Response Discharge
Monitoring Report (DMR).
The following pollutants exhibited exceedances of the BMVs during this monitoring event: Total Suspended
Solids, Copper, and Zinc. We will conduct a Tiered Response at the next qualifying rainfall event for the
pollutant that exceeded the BMVs.
If you have any questions or concerns, please feel free to contact me at [phone], or our
environmental consultant, Rob Duffy of Antea Group at [phone].
Sincerely,
Dan Buwalda
Keywell Metals, L.L.C.
Director of Aerospace Operations
Attachment

Semi-annual Stormwater Discharge Monitoring Report (DMR)
for North Carolina DEMILR General Permit No. NCG200000 — Scrap Metal Recycling
Date submitted January 24, 2019
CERTIFICATE OF COVERAGE NO. NCG20 0 5 2 1 SAMPLE COLLECTION YEAR 2018
FACILITY NAME _Keywell Metals. LLC - Matthews SAMPLE PERIOD ❑ Jan -June ❑ July -Dec
COUNTY Union or 0 Monthly'_ December (month)
PERSON COLLECTING SAMPLES Tony Tyson DISCHARGING TO CLASS ❑ORW ❑HQW ❑Trout ❑PNA
LABORATORY Prism Labs, Inc. Lab Cert. # 402 ❑Zero -flow ❑Water Supply ❑SA
Comments on sample collection or analysis: [7]Saltwater [Mother N: CSW
Part A: Stormwater Benchmarks and Monitoring Results
PLEASE REMEMBER TO SIGN ON THE REVERSE 3
❑ No discharge this period?z
Outfall No.
Date Sample
Collected'
(mo/dd/yr)
24-hour rainfall
amount,
Inches-3
Total Suspended
Solids
Chemical Oxygen
Demand
Non -polar oil & grease
EPA Method 1664
(SGT-HEM)
Copper,
Total
Lead,
Total
Zinc,
Total
Benchmarks
-
-
100 mg/L or
50 mg/L°
120 mg/L
15 mg/L
0.010 mg/L or
0.005 mg/L5
0.075 mg/L or
0.210 mg/L5
0.126 mg/L or
0.090 mg/L'
OF001
12/14/2018
0.12
130
0.043
0.16
' Monthly sampling (instead of semi-annual) must begin with the second consecutive benchmark exceedance for the same parameter at the same outfall.
z For sampling periods with no discharge at any single outfall, you must still submit this discharge monitoring report with a checkmark here.
3The total precipitation must be recorded using data from an on -site rain gauge. Unattended sites may be eligible for a waiver of the rain gauge requirement-
4 See General Permit text, Table 3 or Table 4, identifying protected receiving water classifications where the more protective TSS benchmark applies.
5 Stormwater discharges into receiving waters classified as saltwater are subject to the second listed benchmark.
Note: Results must be reported in numerical format. For example, do not report Below Detection Limit, BDL, <PQL, Non -detect, ND, or other similar non -
numerical format. When results are below the applicable limits, they must be reported in the forma
t,_"<XX m L" where XX is the numerical value of the
detection limit, reporting limit, quantitation limit, etc, in mg/L.
Note: If you report a sample value in excess of the benchmark, you must implement Tier 1, Tier 2, or Tier 3 responses. See General Permit.
Permit Date: 02/02/2015-12/31/2019 5WU-256, last revised 1/28/2015
Page 1 of 2

Part B: Vehicle Maintenance Area Monitoring Results: only for facilities averaging > 55 gal of new oil per month. N/A
❑ No discharge this period?z
Outfal{ No.
Pate Sample
Collected,
(mo/dd/yr)
24-hour rainfall
amount,
3
Inches
Non -polar O&G by EPA
1664 (SGT-HEM}
Total Suspended Solids
Benchmarks =-_>
-
-
15 mg/L
100 mg/L or 50 mg/C
Footnotes from Part A also apply to this Part B
Note: If you report a sample value in excess of the benchmark, you must implement Tier 1, Tier 2, or Tier 3 responses. See General Permit.
FOR PART A AND PART B MONITORING RESULTS:
A SINGLE BENCHMARK EXCEEDANCE TRIGGERS TIER 1 REQUIREMENTS.
• 2 EXCEEDANCES IN A ROW FOR THE SAME PARAMETER AT THE SAME OUTFALL TRIGGER TIER 2 REQUIREMENTS.
• TIER 3: HAS YOUR FACILITY HAD 4 OR MORE BENCHMARK EXCEEDANCES FOR THE SAME PARAMETER AT ANYONE OUTFALL? YES ❑ No ❑X
IF YES, HAVE YOU CONTACTED THE DEMLR REGIONAL OFFICE AS REQUIRED BY THE PERMIT? YES ❑ No ❑ N/A
REGIONAL OFFICE CONTACT NAME:
Mail an original and one copy of this DMR, including all "No Discharge" reports, within 30 days of receipt of the lab results for at end of monitoring period
in the case of "No Discharge" reports) ta:
Division of Water Resources
Attn: DWR Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
YOU MUST SIGN THIS CERTIFICATION FOR ANY INFORMATION REPORTED:
"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."
dzi._4
(Da e}
Permit Date: 02/02/2015-12/31/2019 SWU-256, last revised 1/28/2015
Page 2 of 2

November 27, 2018
Keywell Metals
Aeraspane and Specialty Steel Rewychn
RECEIVED
Division of Water Resources DEC 4 7 2018
Attn: DWR Central Files CENTRAL FILES
1617 Mail Service Center DWR SECTION
Raleigh, NC 27699-1617
Re: Storm Water Discharge Monitoring Report — 1st Half 2018 Monitoring Event
Keywell Metals, L.L.C.
1035 Commercial Drive, Matthews, Union County, NC 28104
Certificate of Coverage Number NCG200521
Dear Sir/Madam:
Keywell Metals, L.L.C. as referenced and in accordance with the National Pollution Discharge Elimination
System (NPDES) General Permit, is submitting two copies of our 216 Half 2018 Discharge Monitoring Report
(DMR).
The following pollutants exhibited exceedances of the BMVs during this monitoring event: Total Suspended
Solids, Copper, and Zinc. We will conduct a Tier I Response at the next qualifying rainfall event for the
pollutant that exceeded the BMVs.
If you have any questions or concerns, please feel free to contact me at [phone], or our
environmental consultant, Rob Duffy of Antea Group at [phone].
Sincerely,
Dan Buwalda
Keywell Metals, L.L.C.
Director of Aerospace Operations
Attachment

Semi-annual Stormwater Discharge Monitoring Report (DMR)
for North Carolina DEMLR General Permit No. NCG200000 -- Scrap Metal Recycling
Date submitted November 26, 2018
CERTIFICATE OF COVERAGE NO. NCG20 0 5 2 1
FACILITY NAME Keywell Metals. LLC - Matthews
COUNTY Union
PERSON COLLECTING SAMPLES Tony Tyson
LABORATORY Prism Labs, Inc. Lab Cert. # 402
Comments on sample collection or analysis:
Part A. Stormwater Benchmarks and Monitoring Results
SAMPLE COLLECTION YEAR 2018
SAMPLE PERIOD ❑ Ian -June X❑ July -Dec
or ❑ Monthly' month
DISCHARGING TO CLASS ❑ORW ❑HQW ❑Trout ❑PNA
❑Zero -flow [:]waterSupply ❑SA
❑saltwater Mother NLCSW
PLEASE REMEMBER TO SIGN ON THE REVERSE 4
No discharge this period?'
Outfall No.
Date Sample
Collected'
(mo/dd/yr)
24-hour rainfall
amount,
inches3
Total Suspended
Solids
Chemical Oxygen
Demand
Non -polar oil & grease
EPA Method 1664
(SGT-HEM)
Copper,
Total
Lead,
Total
Zinc,
Total
Benchmarks ==>
_
-
100 mg/L or
s0 mg/0
120 mg/L
15 mg/L
0.010 mg/L or
0.005 mg/LS
0.075 mg/L or
0.210 mg/L'
0,126 mg/L or
0.090 mg/Ls
OF001
11/6/2018
0.12
210
78
<1.4
0.045
0.010
0.17
' Monthly sampling (instead of semi-annual) must begin with the second consecutive benchmark exceedance for the same parameter at the same outfall.
Z For sampling periods with no discharge at any single outfall, you must still submit this discharge monitoring report with a checkmark here.
3The total precipitation must be recorded using data from an on -site rain gauge. Unattended sites may be eligible for a waiver of the rain gauge requirement.
" See General Permit text, Table 3 or Table 4, identifying protected receiving water classifications where the more protective TSS benchmark applies.
5 Stormwater discharges into receiving waters classified as saltwater are subject to the second listed benchmark.
Note: Results must be reported in numerical format. For example, do not report Below Detection Limit, BDL, <PQL, Non -detect, ND, or other similar non -
numerical format. When results are below the applicable limits, they must be reported in the format, "<XX me/L", where XX is the numerical value of the
detection limit, reporting limit, quantitation limit, etc. in mg/L.
Note: If you report a sample value in excess of the benchmark, you must implement Tier 1, Tier 2, or Tier.3 responses. See General Permit.
Permit Date: 02/02/2015-12/31/2019 SWU-256, last revised 1/28/2015
Page 1 of 2

Part B: Vehicle Maintenance Area Monitoring Results: only for facilities averaging > 55 gal of new oil per month. ' N/A
❑ No discharge this period?2
Outf all No.
Date Sample
Collected'
(mo/dd/yr)
24-hour rainfall
amount,
Inches
Non -polar O&G by EPA
1664 (SGT-HEM)
Total Suspended Solids
Benchmarks =__>
_
-
15 mg/L
100 mg/L or 50 mg/L
Footnotes from Part A also apply to this Part B
Note: if you report a sample value in excess of the benchmark, you mast implement Tier 1, Tier 1, or Tier 3 responses. See General Permit.
FOR PART A AND PART B MONITORING RESULTS:
• A SINGLE BENCHMARK EXCEEDANCE TRIGGERS TIER 1 REQUIREMENTS.
• 2 EXCEEDANCES IN A ROW FOR THE SAME PARAMETER AT THE SAME OUTFALL TRIGGER TIER 2 REQUIREMENTS.
• TIER 3: HAS YOUR FACILITY HAD 4 OR MORE BENCHMARK EXCEEDANCES FOR THE SAME PARAMETER AT ANY ONE OUTFALL? YES ❑ NO ❑X
IF YES, HAVE YOU CONTACTED THE DEMLR REGIONAL OFFICE AS REQUIRED BY THE PERMIT? YES ❑ NO ❑ N/A
REGIONAL OFFICE CONTACT NAME:
Mail an oriainal and one copy of this DMR. includina all "No Discharaeu reports, within 30 dovs of receipt of the lab results for at end of monitoring period
in the case of "No Discharge" reports] to:
Division of Water Resources
Attn: DWR Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
YOU MUST SIGN THIS CERTIFICATION FOR ANY INFORMATION REPORTED: "
"I certify, under penalty of taw, 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 anti. 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)
(Date)
Permit Date: 02/02/2015-12/31/2019
SWU-256, last revised 1/28/2015
Page 2 of 2