MO-30300_49324_CA_O_20231215_UST Inspection

J4? Cedar Rock
ENVIRONMENTAL
December 15, 2023
Ms. Heather Harjes
4331 Eagle Lake Drive North
Charlotte, NC 28217
CEDAR ROCK ENVIRONMENTAL, P. C.
107 Pioneer Trail
Graham, NC 27253
[phone]
Reference: Inspection of an underground storage tank (UST) located at 4331 Eagle Lake Drive
North, Charlotte, North Carolina
Cedar Rock Project # 377522590
Dear Ms. Harjes:
Cedar Rock Environmental, P. C. (Cedar Rock) performed a site inspection on December 15, 2023 at the
above referenced location. The purpose of the inspection was to determine if the UST previously used for
storing heating oil had leaked causing significant contamination of the underlying soils. It is our
understanding the residence was built in 1954 which is most likely when the UST was installed.
An inactive UST was observed to be located as shown in the Site Map. Both the fill and vent pipes of the
UST were observed to be intact with the vent pipe being angled over toward the foundation wall. The depth
to the top of the UST is approximately 24 inches below land surface (bls). A portion of the UST was
exposed during trenching operations by Duke Power. It appears the UST was compromised during
trenching. The UST has a length of about 80 inches with a diameter of approximately 44 inches and a
capacity of about 530 gallons. The UST was measured to contain approximately 443 gallons of fluid.
White flagging was installed to mark both ends of the UST (see Photo). No other USTs used for storing
heating oil were discovered on the property using a metal detector to survey the outside perimeter of the
residence where USTs are usually located. No petroleum odors or stains were observed in the crawlspace.
Once the orientation of the UST was determined, a soil boring was performed at the location marked on the
Site Map using a '/2-inch diameter drill auger. The boring was advanced to a depth of approximately 5.8
feet bls, about 0.1 feet below the bottom of the tank. A strong petroleum odor and discoloration was
observed in the soil at the base of the boring suggesting significant leakage from the UST has occurred.
The soil at the base of the boring consists of a gray sandy silt.
The property is currently serviced by a municipal water supply. No water supply wells were observed
within 150 feet of the petroleum release. For this reason, the property should be classified as "Low Risk"
by the State.
Based on the results of this investigation, significant contamination of the soil underlying the UST has been
confirmed. Current law (NCGS 143-215.85 (a) and (b)) requires that any significant release of petroleum
be immediately reported the North Carolina Department of Environmental Quality (DEQ), Division of
Waste Management, Raleigh Regional Office (919-791-4200). According to State law, upon reporting the
release, the current property owner where a release is discovered is identified by the State as the
"Responsible Party" for any State required action relating to the UST leakage. Upon the property owner's
request, Cedar Rock will submit a UST-61 form to satisfy the State's notification requirement for the
release.

Ms. Heather Harjes
December 15, 2023
Page 2
Currently, the property cannot be legally conveyed until a Notice of Residual Petroleum (NRP) is filed with
the Mecklenburg County Register of Deeds office pursuant to NCGS 14313-279.11 (d). The NRP will
contain applicable land use restrictions to minimize the risk of exposure to existing contamination. The
land use restrictions prohibit any disturbance of site soils within a specified radius of the estimated extent
of soil contamination and prevent the future operation or installation of any water supply wells on the
property. Once classified as "Low Risk" and upon approval of the NRP, the DEQ will issue a "Conditional"
Notice of No Further Action (NFA) letter to formally close out the release incident. The "Conditional"
provision in the NFA letter will be removed upon receiving a certified copy of the filed NRP and
the completion of Public Notification requirements. Filing the NRP and performing Public Notification
would not be required if all soil contamination exceeding applicable standards has been removed.
The State currently will not require initial abatement or remedial action of the soil regarding the release of
heating oil from a UST on a "Low Risk" property, however, they will require removal of the tank contents
and properly cleaning the tank interior to abate the petroleum release pursuant to 15A NCAC
2L .0106(b). Once the presence of the UST and confirmed contaminated soil is disclosed to other interested
parties as required by State law, future buyers, homeowner's insurance providers, or lenders may also
require initial abatement and/or remedial actions relating to the UST prior to making any commitments
towards the property. In addition, there exists a potential for further environmental impact to the property
from continued leakage from the UST.
Currently, the presence of soil contamination does not appear to pose any known health risk. Attempting
to remove the UST and associated contaminated soils is costly, would be disruptive to the property and may
not result in a clean closure. For these reasons, we recommend the in -place abandonment of the UST. The
tank abandonment would consist of exposing a portion of the UST by hand excavation, cutting a hole about
two feet in diameter on the topside of the UST, removing all tank contents, cleaning of the tank interior,
and filling the tank with a structurally supportive yet excavatable flowable fill cement slurry. A summary
report signed by a licensed geologist would be generated that would include photographs of each step of
the abandonment process, including a photograph of the interior of the UST to show the UST was properly
cleaned. Cedar Rock can provide this service for a charge of $4,300.00 plus $1.65 per gallon of recovered
fluids. Preparing and filing the NRP and performing the Public Notification requirement will cost an
additional $1,250.00. We also recommend immediate action be taken to secure the UST from potential
flooding. Plastic sheeting should be placed over the top of the exposed portion of the UST and backfilled
placed and tamped on top of the plastic.
The pricing quoted in this report is valid until January 15, 2023. Attached is an invoice for the site
inspection. We appreciate the opportunity to be of service to you. If you have any questions regarding the
content of this report, please call me at 336-684-2734.
Sincerely,
Robert A. Payne, N.C. ricensed Geologist #0970
Attachment
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Ms. Heather Harjes
December 15, 2023
Page 3
Photo. View of the UST location. Both ends of the UST are marked with white flags.

im m iiiiiiiiiiimmj
1 inch = 10 feet
PROJECT: Heather Harjes Property
INCIDENT #: Pending
LOCATION: 4331 Eagle Lake Drive N
CEDAR ROCK
ENVIRONMENTAL, P. C.
• : Soil boring location
r ----- i
: T1 = 550-Gallon UST
----
SITE MAP
Charlotte, Mecklenburg Co.
CRE PROJECT NUMBER: 377522590
FILENAME: 3775-Figl.tcw
VERSION DATE: 12115/2023
FIGURE 1

From:
Beverly, Trudv
To:
Damien Callaghan
Cc:
Josiah Payne
Subject:
RE: [External] UST-61 form submission for the Heather Harjes Property, 4331 Eagle Lake Drive North, Charlotte,
Mecklenburg Co.
Date:
Monday, December 18, 2023 12:27:00 PM
Attachments:
imaae001. ulna
Received.
Trudy
1
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.l3everlyy�a deq.nc.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: hUps:Hdeg.nc.2ov/about/divisions/waste-manaeement/ust
Branch's Above Ground Storage Tanks Website Address: httns://deo.nc.2ov/about/divisions/waste-management/ust/ast-nroiz
INTERACTIVE MAPS WITH DWM SITES AND PERMITTED FACILITIES:
httns://deo.nc. eov/about/divisions/waste-manaeement/waste-manaeement-rules-data/waste-manaeement-eis-mans
File Review Procedures:
htWs://deq.nc. gov/about/divisions/waste-management/ust/file-review-procedures#mooresville-regional-office
ONLINE ACCESS TO UST SECTION DOCUMENTS (Laserfiche):
httns://deq.nc.gov/about/divisions/waste-management IIaserfiche
Document Submittal & UST File Names for Laserfiche Policies:
httlis:Hfiles.nc.gov/nedeg/Waste%20Management/DWM/UST/WhatsNew/Final-Electronic-Document-Submittal-Polia.lidf
h!Ws:Hfiles.nc. gov/nedeq/Waste%20Mana,gement/DWM/UST/Corrective%2OAction/UST%20fle%20names°/`20for°/`2OLaserfiche.docx
From: Damien Callaghan <[e-mail]>
Sent: Monday, December 18, 2023 12:24 PM
To: Beverly, Trudy <[e-mail]>
Cc: Josiah Payne <[e-mail]>
Subject: [External] UST-61 form submission for the Heather Harjes Property, 4331 Eagle Lake Drive
North, Charlotte, Mecklenburg Co.
CAUTION: External email. Do not click links or open attachments unless verified. Report suspicious emails with the
Report Message button located on your Outlook menu bar on the Home tab.
Hi Trudy
Attached is the UST-61 form for a release at the above site and a copy of our inspection
report. As noted on the UST-61 form, the Well Information System indicates the
presence of a drinking water supply well on the northeastern adjacent lot, which, if it
exists, may be within 150 feet of the release area. This lot is vacant and wooded. No

well was observed during the initial site inspection. We are scheduled to abandon the
UST on 12/21/23. The presence and location of anywell on this lot will be confirmed
during tank abandonment activities.
Damien Callaghan
Cedar Rock Environmental