MO-4523_14987_G_NORR_20210329_Notice of Regulatory Requirments

ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
MICHAEL SCOTT
Director
NCDOT
Roadside Environmental Unit
1557 Mail Service Center
Raleigh, NC 27699-1557
Attn: Jeff Walston
(via email)
Dear Mr. Walston:
NORTH CAROLINA
Environmental Quality
March 29, 2021
Re: Notice of Regulatory Requirements
15A NCAC 2L .0407(b)
Risk -based Assessment and Corrective Action
for Petroleum Underground Storage Tanks
NCDOT Mt. Pleasant Maintenance Yard
150 Dutch Rd (SR 2604), Mount Pleasant
Cabarrus County
Incident Number: 14987
Risk Classification: High
The UST Section, Division of Waste Management (DWM), Mooresville Regional Office
(MRO) received the December 8, 2020 Groundwater Monitoring Report on December 17, 2020. The
report recommending conducting an additional sampling event of monitoring and supply wells to
monitor reviewed and approved on March 29, 2021. The electronic report copy has been loaded to
the electronic document storage system (Laserfiche).
The report indicates:
• Groundwater in the shallow aquifer is estimated to flow to the north-northeast
• C9-C22 Aromatics were detected at a concentration above its 2L Standard in MW-6R.
• Compounds were not detected above 2L Standards in the remaining nine monitoring wells
sampled
• Terracon was unable to collect a sample from two water supply wells within 1,000 feet
(WSW-2 and WSW-3) during the August 2020 sampling event.
• Dutch Buffalo Creek is located approximately 300 feet to the west of the source area.
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

Per this notice:
• Continue semi-annual monitoring of the site.
• Monitoring wells MW-4R, MW-5, and MW-7 can be omitted from the sampling schedule.
• Collect depth to water measurements from on -site monitoring wells during sampling events.
• Continue to sample water supply wells WSW-2 and WSW-3.
• The next sampling event shall occur in August 2021.
• The next monitoring report shall be submitted by September 30, 2021.
Please note that sampling and correction action 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.
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.Beverlya,ncdenr. og_v or telephone at [phone].
Sincerely, k_� L q ryJ ;6ajO p,
Trudy Beverly, L.G.
Hydrogeologist
Mooresville Regional Office
UST Section, Division of Waste Management, NCDEQ
cc: Mike Downs, Cabarrus County Manager (via email)
Chrystal Swinger, Cabarrus County Environmental Health (via email)
Justin Fabriziani, Terracon (via email)
pannwY*�` n�ia.nama aal�
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
704.663.1644

Beverly, Trudy
From: Beverly, Trudy
Sent: Monday, March 29, 2021 1:23 PM
To: Walston, Jeffrey D
Cc: Mike Downs; Chrystal L Swinger; Fabriziani, Justin L
Subject: NCDOT Mt. Pleasant Maintenance Yard - UST Incident #14987 — Notice of Regulatory
Requirements
Attachments: MO-4523_14987_G_NORR_20210329_Notice of Regulatory Requirments.pdf
Please see the attached Notice of Regulatory Requirements letter for NCDOT Mt. Pleasant Maintenance Yard located at
150 Dutch Rd (SR 2604), Mount Pleasant, Cabarrus County, North Carolina (incident #14987).
Trudy
�ETrudy 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 everlygncdenr. 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://deg.nc.gov/about/divisions/waste-management/ust
Branch's Above Ground Storage Tanks Website Address: https:Hdeq.nc.gov/about/divisions/waste-management/ust/ast-program
INTERACTIVE MAPS WITH DWM SITES AND PERMITTED FACILITIES:
https://dea.nc. eov/about/divisions/waste-management/waste-management-rules-data/waste-management-eis-mans
File Review Procedures:
https://deq.nc. gov/about/divisions/waste-management/ust/file-review-procedures#mooresville-regional-office
ONLINE ACCESS TO UST SECTION DOCUMENTS (Laserfiche):
hitps://deq.nc.gov/about/divisions/waste-management/laserfiche
Document Submittal & UST File Names for Laserfiche Policies:
https://files.nc.¢ov/ncdeci/Waste%2OManagement/DWM/UST/WhatsNew/Final-Electronic-Document-Submittal-Policv.vdf
https:Hfiles.nc. gov/ncdeq/Waste%2OManagement/D WM/UST/Corrective%2OAction/UST%20file%20names%20for%2OLaserfiche.docx