NCS000548_Marshall Stakeholder Questions_20200915

Gwinn, Matt
From: Wylie, Robert R <[e-mail]>
Sent: Monday, September 14, 2020 9:36 AM
To: Gwinn, Matt
Subject: [External] NCS000548 Marshall Questions
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Matt,
In response to the note below and our telephone conversation on Friday I offer the following:
1. SW025 and SW026 both discharge into unnamed tributaries that flows into Lake Norman.
2. Stormwater from Outfall SW011 has historically been less than detectable for cadmium. In April it was above
the benchmark level. But the cause is not clear. There was no on -site activities that were in operation that were
deemed to cause this. There are roads (on -site and off -site) that flow into the drainage area for SW011. There
was no painting operation taking place nor has there been any painting operation in years.
3. The site does not have any PCB -containing transformers or electrical equipment. Site -wide, all historic
stormwater testing for PCBs have been below detectable.
I am getting a map that outlines the on -site ash haul roads and notes their drainage areas.
Thanks,
Robert
From: Gwinn, Matt <[e-mail]>
Sent: Friday, September 11, 2020 1:10 PM
To: La Sala, Joseph Scott <[e-mail]>
Cc: Lucas, Annette <[e-mail]>; Wylie, Robert R <[e-mail]>
Subject: [EXTERNAL] NCS000548 Marshall Questions
Hi Scott,
Some DEQ representatives and I had a meeting with stakeholders this week about the Marshall permit renewal, and I
wanted to see if you could address a few concerns that came up. One concern was about the exceedance at outfall
SW011 from the sampling event on 4/23/2020. 1 know that we touched on this during our last conversation, but I
wanted to see if you could provide some context for why the levels of certain parameters like cadmium were elevated in
this sample. Another concern was about PCBs due to the impaired waters status for PCBs in fish tissue in Lake Norman. I
was wondering if you can confirm that PCBs are no longer being stored on the site, and that there have never been any
detections of PCBs in stormwater samples collected at the site.
Thank you,

Matt
Matt Gwinn
Stormwater Program Environmental Technician II
Division of Energy, Mineral and Land Resources
North Carolina Department of Environmental Quality
Office: [phone]
Email: matt,gwinna-ncdenr.gov
Web site: deq.nc.qov/SW
Physical Address: 512 North Salisbury Street, Office 640L, Raleigh, NC 27604
Mailing Address: 1612 Mail Service Center, Raleigh, NC 27699-1612
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