AS-30321_49342_CA_CLO_20240111

CEDAR ROCK ENVIRONMENTAL, P. C.
107 Pioneer Trail
Graham, NC 27253
[phone]

January 11, 2024

Mr. Robert Hawkins
527 East Oak Street
Marion, NC 28752

RE: Underground Storage Tank (UST) Closure Assessment Report
527 East Oak Street, Marion, North Carolina
Cedar Rock Project Number 378022590

Dear Mr. Hawkins:

Cedar Rock Environmental, P.C. (Cedar Rock) is pleased to submit this report describing activities
and results for the in-place abandonment of the onsite UST located at 527 East Oak Street in
Marion, North Carolina. The UST abandonment was performed on January 11, 2024. Included
in this report are project documents consisting of a disposal manifest and photographic
documentation. This report should be kept with other documents pertaining to the residential
property.

Soil contamination was detected beneath the UST during a site inspection performed on January
10, 2024. The release was reported to the Department of Environmental Quality (DEQ) using a
UST-61 form on January 11, 2024. Although the State no longer requires further assessment of
the contamination, the State does require the filing of a Notice of Residual Petroleum (NRP) prior
to conveying the property to another party. The NRP includes land use restrictions prohibiting
any disturbance of site soils within a specified radius of the estimated extent of soil contamination
and prohibits the use or installation of any water supply wells on the property. Cedar Rock is in
the process of filing the NRP. The DEQ should issue a Conditional Notice of No Further Action
(NFA) letter within the next several days. Upon receipt of proof that the local officials and adjacent
property owners have been notified of the release by receiving a copy of the Conditional NFA
letter, and that the NRP has been filed, the DEQ will reissue the NFA letter with no conditions to
officially close out the petroleum release incident.

Enclosed is an invoice for this work effort. If you have any questions, please do not hesitate to
contact me at 336-684-3836. Thank you for your consideration of Cedar Rock to provide you with
this service.

Sincerely,

Josiah D. Payne, L.G.
Vice President

Attachments
Cedar Rock
ENVIRONMENTAL

UNDERGROUND STORAGE TANK
CLOSURE ASSESSMENT REPORT FOR
527 EAST OAK STREET
MARION, NORTH CAROLINA

Prepared for:

Mr. Robert Hawkins
Marion, North Carolina

Prepared by:
Cedar Rock Environmental, P.C.
107 Pioneer Trail
Graham, North Carolina

_____________________
Josiah D. Payne, L.G.
Vice President

January 11, 2024

CR #378022590

i

TABLE OF CONTENTS

Section Page No.

1.0 INTRODUCTION 1

2.0 PROJECT 1

FIGURE

1 Site Map

APPENDICES

A Fluid Disposal Manifest

B Photographic Documentation

ii

I hereby certify this 11th day of January 2024 that this report was prepared by me or under my
direct supervision.

Josiah D. Payne, L.G.
Geologist

1

1.0 INTRODUCTION

Cedar Rock Environmental, P.C. (Cedar Rock) was contacted by Mr. Robert Hawkins of Marion,
North Carolina to abandon in-place an underground storage tank (UST) located at 527 East Oak
Street in Marion, North Carolina. The UST was first inspected on January 10, 2024. 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. The depth to the top of the UST is approximately 17 inches below land
surface (bls). The UST has a length of about 93 inches with a diameter of approximately 43 inches
and a capacity of about 560 gallons. The UST was measured to contain approximately 89 gallons
of fluid. White flagging was installed to mark both ends of the UST (see Photo 1). 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. Two copper fuel
delivery/return lines with an inline oil filter were observed extending about seven feet into the
basement where they were connected to the furnace. No petroleum odors or stains were observed
in the basement.

Once the orientation of the UST was determined, a soil boring was performed at the location
marked on the Site Map using a ¾-inch diameter drill auger. The boring was advanced to a depth
of approximately 5.5 feet bls, about 0.5 feet below the bottom of the tank. A strong petroleum
odor 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 an orangish brown 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.

2.0 PROJECT

The in-place abandonment of the UST was performed on January 11, 2024. The abandonment
consisted of the hand excavation of the soils overlying the southeastern end of the UST to expose
the topside of the tank. A hole approximately 1.5 feet in diameter was then cut on the top of the
UST to allow for removal of the tank contents, cleaning and visual inspection of the UST interior,
and subsequent filling. The tank was pressure washed to remove all residual petroleum sludge.
Residual oil in the fuel lines was also removed by vacuum. The fuel lines were then cut and
crimped back to the foundation wall and removed from the basement. Approximately 119 gallons
of fluid and sludge (including rinsate) were removed from the UST. The fluid disposal manifest
for the tank contents is included in Appendix A.

After the interior of the UST was cleaned, the tank was then entirely filled with an excavatable
flowable fill cement slurry. Once filled, the exposed portion of the UST was then covered with
site soils (see Appendix B - Photographic Documentation).

FIGURE

SITE MAP

PROJECT: ____________________________CEDAR ROCK
ENVIRONMENTAL, P. C.SITE MAPINCIDENT #: __________________________
LOCATION: ___________________________
___________________________
CRE PROJECT NUMBER: _______________
FILENAME: ____________________
VERSION DATE: ________________
0 5 10 20
1 inch = 10 feet
: T1 = 560-Gallon UST
Robert Hawkins Property
Pending
527 East Oak Street
Marion, McDowell Co.
378022590
3780-Fig1.tcw
1/10/2024
N
FIGURE 1
House
T1
Carport
Porch
Front
porch
: Soil boring location

APPENDIX A

FLUID DISPOSAL MANIFEST

APPENDIX B

PHOTOGRAPHIC DOCUMENTATION

Photo 1. View of the UST site prior to abandonment activities.

Photo 2. View of the UST interior prior to the removal of tank contents.

Photo 3. View of the UST interior after the removal of UST contents and
pressure wash cleaning of the tank interior.

Photo 4. View of the UST being filled with flowable fill cement slurry.

Photo 5. View of the UST after filling with flowable fill cement slurry.

Photo 6. View of the UST site after the completion of abandonment activities.