WS-2854_7121_CA_O_20220505_Soil-excavation-approval

1
Gene Mao
From:Kromm, Carin <[e-mail]>
Sent:Thursday, May 5, 2022 4:32 PM
To:Gilbert, Christopher; Gene Mao; Ashley Dinkins; Lepard, Mindy; Estkowski, Linda
Cc:Ball, Jonathon
Subject:RE: [External] PNG Greensboro Incident 7121 Remedial Action
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Hi Chris-

We agree with the remedial strategy that you have outlined below.

Carin Lee Kromm, L.G.
Corrective Action Branch Head, UST Section
Division of Waste Management
North Carolina Department of Environmental Quality
336-776-9682 (Office)
336-409-6748 (Cell)
[e-mail]

Samples collected from active UST systems should be analyzed for oxygenates

COUNTY ASSIGNMENTS (Subject to Change. Check List Frequently):
Guilford County: Gene Mao (336-641-3589) Ashley Dinkins (336-641-5557) Jordan Lerew (336-641-3541)
Christina Schroeter: Ashe and Forsyth (336-776-9683) 
Mindy Lepard: Alamance and Surry (336-776-9686) 
Linda Estkowski: Caswell, Davie, Rockingham, Stokes, Watauga, Yadkin (336-776-9680) 
Doug Whitmire: Allegheny, Davidson, Randolph, Wilkes (336-776-9685) 
Karen Hall: All counties and phases through and LSA, Complaints and Spills (336-776-9681)
Shelia McIntosh: File Reviews (336-776-9630)

ALL UST ARCHIVED FILES CAN BE FOUND ON THE FOLLOWING LINK:
https://deq.nc.gov/about/divisions/waste-management/laserfiche
DWM LOCATOR TOOL: USE MAP FOR LOCATING UST SITES ACROSS THE STATE:
https://ncdenr.maps.arcgis.com/apps/webappviewer/index.html?id=7dd59be2750b40bebebfa49fc383f688
UST FACILITY DABASE (Facility Permitting and Inspection Documents):
https://xapps.ncdenr.org/wm/docs/WMDocs_Search.jsp

From: Gilbert, Christopher <Christopher.Gilbert@duke‐energy.com>  
Sent: Thursday, May 5, 2022 4:07 PM 
To: Mao, Gene <[e-mail]>; Dinkins, Ashley E <[e-mail]>; Lepard, Mindy 
<[e-mail]>; Kromm, Carin <[e-mail]>; Estkowski, Linda 
<[e-mail]> 
2
Cc: Ball, Jonathon <[e-mail]> 
Subject: [External] PNG Greensboro Incident 7121 Remedial Action 

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Good afternoon, 

I hope this email finds you well. I’m following up on a conversation I had with Carin Kromm on April 21, 2022 regarding 
the subject petroleum incident. On behalf of Duke Energy’s affiliate, Piedmont Natural Gas (PNG), Arcadis is proceeding 
with the remedial strategy, soil excavation, outlined in Arcadis’ January 28, 2022 work plan. However, PNG and Arcadis 
will not further pursue trust fund pre‐approval for the excavation activities. 

PNG and Arcadis acknowledge that determining the most cost effective remediation approach can be challenging. 
Furthermore, there are often other factors that must be considered that are not necessarily contemplated in the 
guidance documents and regulations, especially at urban sites being redeveloped in which the UST owner/operator is 
different from the property owner. It is the opinion of PNG and Arcadis that a significant amount of petroleum impacted 
media remains in the subsurface at the property and the removal of that media through excavation would more quickly 
achieve cleanup objectives. While other approaches could ultimately achieve cleanup objectives (e.g., mobile multi‐
phase extraction and many years of monitored natural attenuation), PNG has committed to the current property owner 
that Arcadis will excavate impacted soil from the site.  

Considering these additional factors, we humbly request that Guilford County and NCDEQ approve Arcadis’ remedial 
strategy with the understanding that Arcadis and PNG will not further pursue trust fund pre‐approval for the excavation 
activities. 

Sincerely, 
Chris Gilbert   

Chris Gilbert, PE (NC, SC, TN, AL) | Duke Energy | Lead Environmental Specialist 
555‐A Brevard Road, Asheville, North Carolina 28806 
Mobile: [phone] | christopher.gilbert@duke‐energy.com