NCG030664_Tier 1 Response Follow Up_20240912

Eplin, Jerry W
From: Jamie McGrath <[e-mail]>
Sent: Thursday, September 12, 2024 5:59 PM
To: Eplin, Jerry W
Cc: Nick Iknayan
Subject: [External] Southwire I Stormwater Permit I Tier 1 Response Follow Up
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Good evening. I wanted to follow up with you on Southwire's Stormwater Tier 1 Response to our benchmark
exceedance within the 30 day response period. Please let me know if you have any questions or follow up.
• Quarterly Stormwater Discharge Monitoring: Jul —Sept 2024— Tier 1 Response
o Date Sampled: 07/29/2024
o SWPP Documented: 8/12/2024 (Results received)
o DENR Notified: 8/15/2024
o DMR Reported: 8/13/2024
o Exceedance Amounts:
■ ROS Outfall #2: Copper (Benchmark 0.010 mg/I) Amount: 0.022mg/L
■ ROS Outfall #2: Zinc (Benchmark 0.126 mg/I) Amount: 0.18mg/L
o Potential Cause:
■ Hydraulic oil leaks from orange and white Kalmars— leaking on shipping yards in small
quantities while operating
■ Continuous reel repairs and rework that are preformed outside
■ Open top scrap metal container
■ Metal stored outside of maintenance that contains / potential to contain zinc / copper
■ Scrap reels of exposed electrical core
■ Increased truck traffic— increase of tire dust, tire wear from forklifts, increased
contractors (May 16 trucks, June 14 trucks, July 24 trucks)
■ Galvanized steel racking components outside
o Follow up Storm Water Inspection (per Tier One Instruction): 8/14/2024
o SWPP Updated: 8/15/2024
o Response Actions / Solutions /Action Plans:
■ Kalmar (white and orange) repairs — no longer leaking hydraulic fluid
■ Install berms to all curbs around reel repair area—all hydraulic leaks have been fixed
/repaired on both white and orange kalmars. Completed 8/20/2024
■ Need closed top scrap metal container— On site 8/27/2024. Small open top scrap metal
container has been removed permanently.
■ Scrap reels of exposed electrical core— being removed over the next several months -
Timeline TBD
■ Truck traffic will lessen due to product orders decreasing—see traffic decrease listed
above - completed
■ Galvanized Steel racking components will be relocated so not stored outside — Has been
moved from shipping yards to inside storage location
■ Galvanized steel reel stored outside— needs to be removed — Quoting removal
■ Outside Kalmar repairs — put berms around exterior of Kalmar repair area and covers on
main stormwater drains - completed
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■ Metals for work repairs stored outside of maintenance that contains / potential to contain
zinc / copper - Area cleaned and no galvanized metals are stored outside nor any
copper containing metals - completed
■ Confirmed that our landscapers do not use any fertilizer or chemicals that contain zinc.
o Follow up Stormwater Sampling: TBD (next significant rainfall event)
Jamie McGrath
EHS Manager
Work: 704.379.9621
Cell: 704.785.7838
0amie.mcgrath(a)-southwire.com
So - • V
From:Jamie McGrath <[e-mail]>
Sent:Thursday, August 15, 2024 10:54 AM
To:[e-mail]
Cc: Nick Iknayan <[e-mail]>
Subject: Southwire I Stormwater Permit
Site Name / Address:
Southwire Huntersville
12331 Commerce Station Drive
Huntersville, NC 28078
Contact name: Jamie McGrath / EHS Manager
Stormwater Permit: NCG030664
This is to notify you that Southwire had two benchmark exceedances in our last quarterly stormwater
sampling. We had an exceedance in copper and zinc. (Exceedance amounts listed below). This
exceedances requires Southwire to report at a Tier One response for a benchmark exceedance. Please see
the below Tier One Response actions that we have taken and our plan for corrective actions.
• Quarterly Stormwater Discharge Monitoring: Jul —Sept 2024— Tier 1 Response
o Date Sampled: 07/29/2024
o SWPP Documented: 8/12/2024 (Results received)
o DENR Notified: 8/15/2024
o DMR Reported: 8/13/2024
o Exceedance Amounts:
■ ROS Outfall #2: Copper (Benchmark 0.010 mg/I) Amount: 0.022mg/L
■ ROS Outfall #2: Zinc (Benchmark 0.126 mg/I) Amount: 0.18mg/L
o Potential Cause:
■ Hydraulic oil leaks from orange and white Kalmars— leaking on shipping yards in small
quantities while operating
■ Continuous reel repairs and rework that are preformed outside
■ Open top scrap metal container
■ Scrap reels of exposed electrical core
■ Increased truck traffic— increase of tire dust, tire wear from forklifts, increased
contractors
■ Galvanized steel racking components outside
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o Follow up Storm Water Inspection (per Tier One Instruction): 8/14/2024
o SWPP Updated: 8/15/2024
o Potential Solution:
■ Kalmar (white and orange) repairs — no longer leaking hydraulic fluid
■ Install berms to all curbs around reel repair area— in process
■ Need closed top scrap metal container— in process
■ Scrap reels of exposed electrical core— being removed over the next several months
■ Truck traffic will lessen due to product orders decreasing
■ Galvanized Steel racking components will be relocated so not stored outside
o Follow up Stormwater Sampling: TBD
We will continue to work to create viable corrective solutions for this issue and will notify you of any
changes. Also attached is the analytical reporting from our sampling. Please reach out to me at your earliest
convenience should you have any questions.
Thank you.
Jamie McGrath
EHS Manager
Southwire I Huntersville Plant
12331 Commerce Station Drive
Huntersville, NC 28078
Work: 704.379.9621
Cell: 704.785.7838
jamie.mcgrathCa)southwire.com
n •w
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