MO-4523_14987_G_C_20200121_Report Receipt Letter

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
January 21, 2020
Re: Acknowledgement of Report Receipt
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 September 25, 2019 Groundwater Monitoring Report on September 26, 2019
(paper copy received January 17, 2020). The report recommending conducting an additional
sampling event of monitoring and supply wells to monitor for temporal trends particularly in
monitoring well MW-6R was reviewed and approved on January 21, 2020. The paper report copy
will be maintained in the MRO. The electronic copy has been loaded to the electronic document
storage system (Laserfiche).
The report indicates:
• The groundwater flow direction in the shallow aquifer (3 to 25 feet bls) is estimated to be
north.
• C9-C22 Aromatics were detected at a concentration above 2L Standards in MW-6R.
• Compounds were not detected above 2L Standards in the other nine monitoring wells
Sampled.
• There was no visual evidence of water supply wells within a 500-foot radius of the site. Two
water supply wells were visually observed within 1,000 feet to the north of the site (WSW-3
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

& WSW-2. Terracon was unable to collect samples from two water supply wells (during the
August 2019 sampling event.
• Dutch Buffalo Creek is located approximately 300 feet to the west of the source area.
• The on -site buildings are not likely at potential risk for PVI based on the observed
groundwater concentration data and average vertical extent of the vadose zone at the site.
The next semi-annual groundwater monitoring event shall occur in February 2020 with the
Groundwater Monitoring Report submittal due to this office by March 31, 2020. 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. _ og_v or telephone at [phone].
Sincerely,
k_�� ;610j+
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)
Flora J. D'Souza, Terracon (via email)
D F.
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: Tuesday, January 21, 2020 10:22 AM
To: Walston, Jeffrey D
Cc: DSouza, Flora J; Mike Downs; Chrystal Swinger
Subject: NCDOT Mt. Pleasant Maintenance Yard - Incident #14987 — Acknowledgement
of Report Receipt letter
Attachments: MO-4523_14987_G_C_20200121_Report Receipt Letter.pdf
Please see the attached Acknowledgement of Report Receipt letter for NCDOT Mt. Pleasant Maintenance Yard
located at 150 Dutch Rd (SR 2604), Mount Pleasant, Cabarrus County, North Carolina (incident #14987).
Trudy
Trudy Beverly, L.G.
Hydrogeologist, Division of Waste Management
North Carolina Department of Environmental Quality
y UST Section, Mooresville Regional Office
flr:'l IIO' ry�rf��r
704.235.2182 (Office)
Trudy.13everlygncdenn 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: httos://deq.nc.gov/about/divisions/waste-management/ust
Branch's Above Ground Storage Tanks Website Address: h_ptt s:Hdeg.nc.gov/about/divisions/waste-management/ust/ast-program
INTERACTIVE MAPS WITH DWM SITES AND PERMITTED FACILITIES:
httos://deu.nc. eov/about/divisions/waste-manaeement/waste-manaeement-rules-data/waste-manaeement-eis-mans
File Review Procedures:
htips:Hdeq.nc. gov/about/divisions/waste-management/ust/file-review-procedures#mooresville-regional-office
ONLINE ACCESS TO UST SECTION DOCUMENTS (Laserfiche):
httos: //dea.nc. eov/about/divisions/waste-manaeement/laserfiche
Document Submittal & UST File Names for Laserfiche Policies:
https:Hfiles.nc.gov/ncdeq/Waste%2OManagement/DWM/UST/Corrective%2OAction/Electronic%2ODocument%2OSubn- ittal%2OMemo%2OUpdate.pdf
https:Hfiles.nc. gov/ncdeq/Waste%2OManagement/D WM[UST/Corrective%2OAction/UST%20file%20names%20for%2OLaserfiche.docx