HomeMy WebLinkAboutMO-29931_49016_CA_SCR_20220902_Site Closure ReportCEDAR ROCK ENVIRONMENTAL, P.C.
107 Pioneer Trail
Graham, NC 27253
(336) 376-0394
September 2, 2022
Ms. Holly Payne
313 Lentz Road
Statesville, NC 28625
RE: Underground Storage Tank (UST) Closure Assessment Report
313 Lentz Road, Statesville, North Carolina
Cedar Rock Project Number 350822590
Dear Ms. Payne:
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 313 Lentz Road in
Statesville, North Carolina. The UST abandonment was performed on September 2, 2022.
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 August
24, 2022. The release was reported to the Department of Environmental Quality (DEQ) using a
UST-61 form on September 1, 2022. 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 filed
the NRP on September 2, 2022. The DEQ will not issue a Conditional Notice of No Further Action
(NFA) letter until the onsite water supply well has been properly abandoned. Once the well has
been abandoned, the DEQ will issue the Conditional NFA letter, and 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 336-376-0394. Thank you for your consideration of Cedar Rock to provide you with
this service.
Sincerely,
Robert A. Payne, L.G.
President
RAP:rp
Attachments
Cedar Rock
ENVIRONMENTAL
UNDERGROUND STORAGE TANK
CLOSURE ASSESSMENT REPORT FOR
313 LENTZ ROAD
STATESVILLE, NORTH CAROLINA
Prepared for:
Ms. Holly Payne
Statesville, North Carolina
Prepared by:
Cedar Rock Environmental, P.C.
107 Pioneer Trail
Graham, North Carolina
_____________________
Robert A. Payne, L.G.
President
September 2, 2022
CR #350822590
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 2nd day of September 2022 that this report was prepared by me or under my
direct supervision.
Robert A. Payne, L.G.
Geologist
1
1.0 INTRODUCTION
Cedar Rock Environmental, P.C. (Cedar Rock) was contacted by Ms. Holly Payne of Statesville,
North Carolina to abandon in-place an underground storage tank (UST) located at 313 Lentz Road
in Statesville, North Carolina. The UST was first inspected on August 24, 2022. 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 45 inches below land
surface (bls). The UST has an estimated length of about 94 inches with a diameter of
approximately 40 inches and an estimated capacity of about 560 gallons. The UST was measured
to contain approximately 8 gallons of fluid. White flagging was installed to mark the ends of the
UST (see Photo 1). No other USTs on the property were discovered using a metal detector to
survey along the outside perimeter of the house where USTs would usually be located. Two copper
fuel delivery/return lines were observed in the basement to be plugged. 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 northern end
of the tank using a 3.25-inch diameter stainless steel hand auger. The boring was advanced to a
depth of approximately 7.0 feet bls, about 0.1 feet above the bottom of the UST. A strong
petroleum odor and discoloration was observed in the soils from a depth of approximately 6.5 to
7.0 feet bls suggesting significant leakage from the UST has occurred. The native soils underlying
the tank consist of a reddish-brown sandy silt.
2.0 PROJECT
The in-place abandonment of the UST was performed on September 2, 2022. The abandonment
consisted of the hand excavation of the soils overlying the center 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 measured to contain approximately 27 gallons of fluids on September 2,
2022. The tank was pressure washed to remove all residual petroleum sludge. Residual oil in the
fuel lines was also removed by vacuum. The accessible portion of the fuel lines were removed
from the basement area. Approximately 57 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 MAP
INCIDENT #: __________________________
LOCATION: ___________________________
___________________________
CRE PROJECT NUMBER: _______________
FILENAME: ____________________
VERSION DATE: ________________
0 5 10 20
1 inch = 10 feet
: T1 = 560-Gallon UST
Holly Payne Property
Pending
313 Lentz Road
Statesville, Iredell Co.
350822590
3508-Fig1.tcw
9/1/2022
N
FIGURE 1
T1
House
Porch
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.