MO-6731_27502_G_NORR_20190205_NORR

ROY COOPER
Governor
MICHAEL S. REGAN
Secrerary
MICHAEL SCOTT
Director
Service Distributing Company, Inc.
Post Office Box 310
Albemarle, NC 28002
Attn: Robert E. Gresham
Dear Mr. Gresham:
NORTH CAROLINA
Environmental Quality
February 5, 2018
Re: Notice of Regulatory Requirements
15A NCAC 2L .0407(b)
Risk -based Assessment and Corrective Action
for Petroleum Underground Storage Tanks
Servco No. 00311
24 North Church Street, Concord
Cabarrus County
Incident Number: 27502
Risk Classification: High
The UST Section, Division of Waste Management (DWM), Mooresville Regional Office (MRO) received the
November 26, 2018 Monitoring Report on November 27, 2018. The report recommending incident closure through a
Notice of Residual Petroleum and issuance of a No Further Action for the incident was reviewed and approved on
February 5, 2019. The paper report copies will be maintained in the MRO. The electronic copies have been loaded to the
DWM's electronic document storage system (Laserfiche).
The report states:
• The results of the laboratory data indicate that the groundwater samples collected from monitoring wells MW-8,
MW-9 and MW-IOR were above NCAC 2L standards for benzene and that samples collected from monitoring
well MW-IOR exceeded the NCAC 2B standard for benzene and toluene. The laboratory analysis further indicates
NCAC 2L standards for ethylbenzene and total xylenes were exceeded in the groundwater sample collected from
MW-IOR and for naphthalene in the groundwater samples collected from MW-8 and MW-IOR. MTBE exceeded
NCAC 2L standards in the groundwater samples collected from MW-9 and MW-IOR; and PCE exceeded the
NCAC 2L standard in samples collected from MW-1, MW-2, MW-4, MW-5, MW-7 and MW-9. None of the
groundwater samples collected indicated any constituents exceeding Gross Contamination Levels (GCLs). No
free product was measured in the gauged monitoring wells during the November 2018 sampling event.
• Review of the current data indicates that the predominant groundwater flow at the site is in a northeasterly
direction.
NORTH C.4R0.'+1A�E Q�
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North Carolina Department of Environmental Quality I Division of Waste Management
Mooresville Regional 0Mce 1 610 East Center Avenue, Suite 301 1 Mooresville. North Carolina 28115
704.663.1699

Based on previous receptor surveys completed by ECEA, there is one water supply well utilized for irrigation
purposes only and located within 250 feet of the subject property. In addition, according to the USGS, the closest
surface water body appears to be an unnamed tributary of Three Mile Branch located approximately 500 feet
north of the subject property. It appears the surface water is classified as class "C" surface water. Based on the
presence of the irrigation well located within 250 feet of the source area, the site is ranked as a "High" risk site.
The soil and groundwater remediation system, consisting of a soil vapor extraction and air sparge system was
started on June 28, 2010. The system was operational after belts were installed during the July and August site
visits. Based on the TA dated September 13, 2018 Excel shut the system down on September 27, 2018. The
system was off during the November 2018 sampling event.
Current laboratory analytical data indicates that overall dissolved phase hydrocarbon constituents (primarily
BTEX and MTBE) continues to occur at the site and are decreasing with some seasonal fluctuations. Remaining
constituent levels exceed NCAC 2L standards at multiple locations for various constituents and at one monitor
well exceed NCAC 2B standards (benzene and toluene).
Per this Notice of Regulatory Requirements:
• Continue sampling monitoring wells on a semi-annual basis (next sampling event May 2019).
• The remediation system can remain off at present. The AS/SVE remediation system must be properly
maintained and the switch ready in case future use is necessary.
• The next report should include an updated receptor survey for the site in accordance with the most recent
version of the Guidelines for Assessment and Corrective Action for UST Releases.
• Seek permission to abandon WS-1 (Central United Methodist Church).
• The next remediation monitoring report is due no later than May 31, 2019.
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.Beverlykncdenr.gov or telephone at [phone].
Sincerely,,
Trudy Beverly, L.G.
Hydrogeologist
Mooresville Regional Office
UST Section, Division of Waste Management, NCDEQ
cc: Mike Stanforth & Donna Farris, Excel Civil & Environmental Associates, PLLC (via email)
Mike Downs, Cabarrus County Manager (via email)
David Troutman, Cabarrus County Health Department (via email)
Ed Watson, NCDEQ-Division of Water Quality -Regional Operations Section (via email)
NORTH C.4R0.'+1A�E Q�
un of En- r,nn Hs 9Nor
North Carolina Department of Environmental Quality I Division of Waste Management
Mooresville Regional 0Mce 1 610 East Center Avenue, Suite 301 1 Mooresville. North Carolina 28115
704.663.1699

Beverly, Trudy
From: Beverly, Trudy
Sent: Tuesday, February 5, 2019 2:01 PM
To: Mike Stanforth ([e-mail]); Donna Farris ([e-mail]);
'Mike Downs'; 'David Troutman'; Watson, Edward M
Subject: Servco No. 00311 - UST Incident #27502
Attachments: MO-6731 _27502_G_NORR_20190205_NORR.pdf
Please see the attached Notice of Regulatory Requirements letter for Servco No. 00311 located at 24 North Church
Street in Concord, Cabarrus County.
Trudy
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Frnail correspondence to and frorn this address is subjecf 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://deg.nc.gov/about/divisions/waste-management/ust/ast-program
INTERACTIVE MAPS WITH DWM SITES AND PERMITTED FACILITIES:
https://deq.nc.gov/about/divisions/waste-management/waste-management-rules-data/waste-management-gis-maps
File Review Procedures:
https://deq. nc.gov/a bout/divisions/waste-management/ust/file-review-procedures#mooresvi I le -regional -office
ONLINE ACCESS TO UST SECTION DOCUMENTS (Laserfiche):
https://edocs.deg.nc.gov/WasteManagement/Search.aspx
Document Submittal & UST File Names for Laserfiche Policies:
https://files.nc.gov/ncdeq/Waste%20Management/DW M/UST/Corrective%2OAction/Electronic%2ODocument%2OSubmittal%20Me
mo%20Update.pdf
https://files.nc.gov/ncdeq/Waste%20Mana,gement/DWM/ JST/Corrective%2OAction/UST%20file%20names%20for%2OLaserfiche.d
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