MO-4283_13543_G_NORR_20191209_Notice of Regulatory Requirements

ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
MICHAEL SCOTT
Director
W.R. Preslar
901 Highway 24/27
Midland, NC 28107
NCDOT, GeoEnvironmental
Attn: Gordon Box
1589 Mail Service Center,
Raleigh, NC 27699-1589
(via email)
Dear Sirs:
NORTH CAROLINA
Environmental Quality
December 9, 2019
Re: Notice of Regulatory Requirements
15A NCAC 2L .0407(b)
Risk -based Assessment and Corrective Action
for Petroleum Underground Storage Tanks
Preslar Exxon/DOT
901 NC Hwy 24/27, Midland
Cabarrus County
Incident number: 13543
Risk Classification: High
Rank: H 194D
The UST Section, Division of Waste Management (DWM), Mooresville Regional Office
(MRO) received the November 9, 2019 Monitoring Report on November 13, 2019. The report
requesting a risk reclassification was reviewed and approved on November 14, 2019. The paper
report copy will be maintained in the MRO. The electronic copy has been loaded to the DWM's
electronic document storage system (Laserfiche).
A Risk, Rank, and Abatement Rating evaluation was conducted on November 14, 2019 for
the site (H194D). The site is ranked as high risk due to the presence of two drinking water wells
located within 1,000 feet of the source area of the release (WSW-3 & WSW-9) and an irrigation well
North Carolina Department of Environmental Quality I Division of Waste Management
Mooresville Regional Office 1 610 East Center Avenue, Suite 301 1 Mooresville, North Carolina 28115
704.663.1699

located within 250 feet of source area (WSW-1 1). The site also contains soil contamination above
industrial/commercial Maximum Soil Contaminant Concentrations (MSCCs).
The report indicates:
• The petroleum source area for the Site is located in the median of NC Highway 24/27. The
contaminant plume encompasses the source area as well as a small area along the eastbound
right-of-way.
• Based on the available data, shallow groundwater appears to flow to the southeast.
• The primary constituents above the NC 2L Standards are limited to benzene, ethylbenzene, n-
propylbenzene, and naphthalene. However, these constituents continue to show a general
downward trend in the injection performance monitoring wells. Although other VOCs were
detected, their concentrations were below the NC 2L Standards. Benzene, chloromethane,
ethylbenzene, naphthalene, and n-propylbenzene, are below the GCLs and appear stable or
decreasing in the areas of highest concentrations.
Per this Notice of Regulatory Requirements:
• Continue annual monitoring (October) by conducting a groundwater sampling event of
monitoring wells MW-1, MW-4, MW-12, and MW-13 and supply wells in October 2020.
MW-3 can be omitted from the October 2020 sampling event.
• Seek permission to abandon water supply wells WSW-3, WSW-9, and WSW-11.
• The next monitoring report is due by November 30, 2020.
Please note that sampling, correction action, and reporting must be conducted in accordance
with the Guidelines for Assessment and Corrective Action for UST Releases. Failure to comply in
the manner and time specified may result in the assessment of civil penalties and/or the use of the
other enforcement mechanisms. See the following link for April 18, 2017 Monitoring Report
Guidance and Templates Revised Monitoring Report Templates. Incomplete reports will not be
approved and are not reimbursable.
If you have any questions regarding trust fund eligibility or reimbursement from the
Commercial or Noncommercial Leaking Petroleum Underground Storage Tank Cleanup Funds,
please contact the UST Section Trust Fund Branch at [phone]. If you have any questions
regarding the actions that must be taken or the rules mentioned in this letter, please contact me by
email at Trudy.Beverlygncdenr.gov or telephone at [phone].
Sincerely,
�_� I'lZ4
Trudy Beverly, L.G.
Hydrogeologist
Mooresville Regional Office
UST Section, Division of Waste Management, NCDEQ
cc: Cyrus Parker, Gordon Box, & Ashley Cox, NCDOT GeoEnvironmental (via email)
Mike Downs, Cabarrus County Manager (via email)
David Troutman, Cabarrus County Health Department (via email)
Michael Branson, Draper Aden Associates (via email)
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North Carolina Department of Environmental Quality I Division of Waste Management
Mooresville Regional Office 1 610 East Center Avenue, Suite 301 1 Mooresville, North Carolina 28115
704.663.1699

Beverly, Trudy
From: Beverly, Trudy
Sent: Monday, December 9, 2019 3:55 PM
To: Box, Gordon H; Parker, Cyrus F; Cox, Ashley B; Mike Downs; David Troutman;
Mike Branson
Subject: Preslar Exxon/DOT - Incident #13543 — Notice of Regulatory Requirements
Attachments: MO-4283_13543_G_NORR_20191209_Notice of Regulatory Requirements.pdf
Please see the attached Notice of Regulatory Requirements letter for Preslar Exxon/DOT located at 901 NC Hwy
24/27, Midland, Cabarrus County, North Carolina (Incident #13543).
Trudy
Trudy Beverly, L.G.
Hydrogeologist, Division of Waste Management
North Carolina Department of Environmental Quality
UST Section, Mooresville Regional Office
704.235.2182 (Office)
Trudy. B everlykncdenr. gov
Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties.
Office Mailing Address:
610 East Center Avenue, Suite 301
Mooresville, NC 28115
Branch's Underground Storage Tanks Website Address: https://deq.nc.gov/about/divisions/waste-management/ust
Branch's Above Ground Storage Tanks Website Address: https://deq.nc.gov/about/divisions/waste-management/ust/ast-prog am
INTERACTIVE MAPS WITH DWM SITES AND PERMITTED FACILITIES:
https://deo.nc. eov/about/divisions/waste-manaeement/waste-manaeement-rules-data/waste-manaeement-eis-mans
File Review Procedures:
https://deq.nc. gov/about/divisions/waste-manaaement/ust/file-review-procedures#mooresville-regional-office
ONLINE ACCESS TO UST SECTION DOCUMENTS (Laserfiche):
httns://deo.nc. eov/about/divisions/waste-manaeement/laserfiche
Document Submittal & UST File Names for Laserfiche Policies:
htips://files.nc. gov/ncdeq/W aste°/`2OMana,gement/D WM/UST/Corrective%2OAction/Electronic%2ODocument%2OSubmittal%2OMemo%2OUpdate.pdf
https:Hfiles.nc. gov/ncdeq/Waste%2OManagement/DWM/UST/Corrective%2OAction/UST%2Ofile%20namcs%20for%2OLaserfiche.docx