MO-8827_40338_G_NORR_20200909_Notice of Regulatory Requirements

ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
MICHAEL SCOTT
Director
SixOOneStop, Inc.
Attn: Marc Glover, Registered Agent
5661 Highway 601 S.
Concord, NC 28025
(via email)
Dear Mr. Glover:
NORTH CAROLINA
Environmental Quality
September 9, 2020
Re: Notice of Regulatory Requirements
15A NCAC 2L .0407(b) [High Risk]
Risk -based Assessment and Corrective Action
For Petroleum Underground Storage Tanks
Six-O-One Stop
5661 South Highway 601, Concord
Cabarrus County
Incident Number: 40338
Risk Classification: High
The UST Section, Division of Waste Management (DWM), Mooresville Regional Office (MRO)
received the June 10, 2020 Monitoring Reports on June 11, 2020. The report recommending additional
assessment prior to conducting additional remedial actions. was reviewed and approved on June 24, 2020.
The electronic copy has been loaded to the DWM's electronic document storage system (Laserfiche).
The report states:
• On May 8, 2020, CESI personnel attempted to collect groundwater samples from wells MW-1 to
MW-8. Monitoring well MW-4 could not be located as the owner has spread gravel over this
portion of the parking lot. Monitoring well MW-3 could not be sampled because it was blocked
by automotive repair parts stored in a building constructed in 2019. Groundwater samples were
collected from six of the eight monitoring wells and from three neighboring water supply wells.
• Analysis of groundwater samples from the monitoring wells revealed gasoline parameters greater
than the North Carolina Administrative Code (NCAC) 15A 2L standard in wells MW-1, MW-2,
MW-7, MW-8. None of the tested parameters exceeded Gross Contaminant Levels GCLs.
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

• Based on a comparison of prior benzene and MTBE isoconcentration contour diagrams and those
prepared from the May 8, 2020, sampling event, the dissolved hydrocarbon plume appears to be
stable. However, concentrations increased in several wells indicating that rebound from adsorbed
hydrocarbons is occurring.
• Based on the groundwater analytical results of samples collected May 8, 2020, the areal extent of
dissolved hydrocarbons appears to be defined except to the south for benzene.
• Depth to groundwater measurements at the site are approximately 18 feet below grade.
• No free product has been observed at the site.
• One inactive potable well was observed on the northern portion of the Property. The well head
was blocked and groundwater could not be accessed. The Property is provided water from the
City of Concord.
• An interview with the well owner for 5600 Cold Springs Road on May 8, 2020, and an interview
with the second nearest water supply well owner located at 5651 Cold Springs Road on January
21, 2018, stated that they did not want to connect to municipal water.
• The nearest surface water indicated on the topographic map is an unnamed stream located
approximately 1,000 feet northwest of the Property.
• Soil contaminant concentrations above industrial/commercial Maximum Soil Contaminant
Concentrations remain in the vicinity of MW-2/SB-6
Per this Notice of Regulatory Requirements:
• The next sampling event shall be conducted near the end of November 2020. The Monitoring
Monitoring Report for the November 2020 sampling event is due no later than December 31,
2020.
• Soil excavation shall be conducted in the MW-2/SB-6 to remove contamination above
industrial/commercial Maximum Soil Contaminant Concentrations.
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.Beverly(&ncdenr.gov or telephone at [phone].
Sincerely,
� Y" 444
Trudy Beverly, L.G.
Hydrogeologist
Mooresville Regional Office
UST Section, Division of Waste Management, NCDEQ
cc: Chrystal Swinger, Cabarrus County Health Department (via email)
Mike Downs, Cabarrus County Manager (via email)
Steve Irminger, CESI (via email)
Michael Bator, The Vertex Companies, Inc. (via email)
D.EQ2�
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: Wednesday, September 9, 2020 11:09 AM
To: Marc Glover
Cc: Steven Irminger; Chrystal Swinger; Mike Downs; Michael Bator
Subject: RE: Six-O-One Stop - Incident #40338 — Notice of Regulatory Requirements
Steve,
I forgot to include in the NORR that the next Monitoring Report needs to include a table with distances to the water
supply wells in the vicinity of the site.
Thanks,
Trudy
Trudy Beverly, L.G.
Hydrogeologist, Division of Waste Management
North Carolina Department of Environmental Quality
rv�o�Y�r UST Section, Mooresville Regional Office
704.235.2182 (Office)
Trudy.Beverlykncdenr. gov
Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties.
From: Beverly, Trudy
Sent: Wednesday, September 9, 2020 11:06 AM
To: Marc Glover <[e-mail]>
Cc: Steven Irminger <[e-mail]>; Chrystal Swinger <[e-mail]>; Mike
Downs <[e-mail]>; Michael Bator <[e-mail]>
Subject: Six-O-One Stop - Incident #40338 — Notice of Regulatory Requirements
Please see the attached Notice of Regulatory Requirements letter for Six-O-One Stop located at 5661 South Highway
601, Concord, Cabarrus County, North Carolina (Incident #40338).
Trudy
Trudy Beverly, L.G.
Hydrogeologist, Division of Waste Management
_ .DIEQ]�� North Carolina Department of Environmental Quality
�w� runmenta4aL+m� 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:Hdeg.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-program
INTERACTIVE MAPS WITH DWM SITES AND PERMITTED FACILITIES:
https://dea.nc. gov/about/divisions/waste-management/waste-management-rules-data/waste-management-gis-maps
File Review Procedures:
https://d ..gov/about/divisions/waste-management/ust/file-review-procedures#mooresville-regional-office
ONLINE ACCESS TO UST SECTION DOCUMENTS (Laserfiche):
https://deq.nc.gov/about/divisions/waste-manageinent/laserfiche
Document Submittal & UST File Names for Laserfiche Policies:
https:Hfiles.nc.-zov/ncdea/W aste%20Manaaement/DWM/UST/WhatsNew/Final-Electronic-Document-Submittal-Policv.pdf
https://files.nc. gov/ncdeq/Waste%20Management/DWM/UST/Corrective°/n2OAction/UST°/n20file%20names°/u20for%2OLaserfiche.docx