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Home My WebLink AboutWS-29646_48773_M_RPTS_20221214CEDAR ROCK ENVIRONMENTAL, P.C. 107 Pioneer Trail Graham, NC 27253 (336) 376-0394 December 8, 2022 Mr. Andre Leonard 324 Whisper Park Drive Wilmington, NC 28411 RE: Underground Storage Tank (UST) Closure Assessment Report 207 Arbor Drive, Lexington, North Carolina Cedar Rock Project Number 355022590 Dear Mr. Leonard: 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 207 Arbor Drive in Lexington, North Carolina. The UST abandonment was performed on December 8, 2022. The onsite aboveground storage tank (AST) was also removed on this date. Included in this report are project documents consisting of disposal manifests 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 November 28, 2022. The release was reported to the Department of Environmental Quality (DEQ) using a UST-61 form on December 5, 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 December 7, 2022. The DEQ will issue a Conditional Notice of No Further Action (NFA) letter within the next few 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 336-376-0394. Thank you for your consideration of Cedar Rock to provide you with this service. Sincerely, Robert A. Payne, L.G. President Attachments Cedar Rock ENVIRONMENTAL UNDERGROUND STORAGE TANK CLOSURE ASSESSMENT REPORT FOR 207 ARBOR DRIVE LEXINGTON, NORTH CAROLINA Prepared for: Mr. Andre Leonard Wilmington, North Carolina Prepared by: Cedar Rock Environmental, P.C. 107 Pioneer Trail Graham, North Carolina _____________________ Robert A. Payne, L.G. President December 8, 2022 CR #355022590 i TABLE OF CONTENTS Section Page No. 1.0 INTRODUCTION 1 2.0 PROJECT 1 FIGURE 1 Site Map APPENDICES A Disposal Manifests B Photographic Documentation ii I hereby certify this 8th day of December 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 Mr. Andre Leonard of Wilmington, North Carolina to abandon in-place an underground storage tank (UST) located at 207 Arbor Drive in Lexington, North Carolina. The UST was first inspected on November 28, 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 10 inches below land surface (bls). The UST has a length of about 72 inches with a diameter of approximately 45.25 inches and a capacity of about 500 gallons. The UST was measured to contain approximately 410 gallons of fluids. 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 the outside perimeter of the residence where USTs are usually located. Two copper fuel delivery/return lines connected to the UST were observed in the basement coming through the foundation wall adjacent to the tank and extending about 10 feet up in the ceiling where they were cut and crimped. No petroleum odors or staining were observed in the basement. A 275-gallon vertical AST was also observed as shown in the Site Map. The AST was supported off the ground with metal legs on cinderblocks. A single copper fuel delivery line extended from the bottom of the tank and went into the crawlspace. The AST was measured to contain approximately 110 gallons of fluid. The AST appeared to be in good condition. Some sweating was observed around the valve where the supply line is connected to the tank indicating some leakage is occurring. Once the orientation of the UST was determined, a soil boring was performed at the eastern end of the UST using a 3.25-inch diameter stainless steel hand auger. The boring was advanced to a depth of approximately 3.0 feet bls, about 1.6 feet above the bottom of the UST. A strong petroleum odor and discoloration was observed in the soils from a depth of approximately 1.5 to 3.0 feet bls suggesting significant leakage from the UST has occurred. The soils at the base of the boring consist of a grayish blue sandy silt. 2.0 PROJECT The in-place abandonment of the UST was performed on December 8, 2022. The abandonment consisted of the hand excavation of the soils overlying the eastern 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 UST fuel lines were removed and crimped closed at the foundation wall. Approximately 680 gallons of fluid and sludge (including rinsate) were removed from the UST and AST. The AST and its fuel line were also removed on December 8, 2022. Disposal manifests for the tank contents and AST are 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 Nola Leonard Estate Property 48773 207 Arbor Drive Lexington, Davidson Co. 355022590 3550-Fig1.tcw 12/8/2022 N FIGURE 1 T1 T2 House Porch : T1 = 500-Gallon UST T2 = 275-Gallon AST APPENDIX A DISPOSAL MANIFESTS CEDAR ROCK ENVIRONMENTAL, P.C. 107 Pioneer Trail Graham, NC 27253 (336) 376-0394 Tank Owner/Location: Andre Leonard 207 Arbor Drive Lexington, NC Tank Owner’s Authorized Representative: Cedar Rock Environmental, P.C. 107 Pioneer Trail Graham, NC 27253 Robert A. Payne, President (336) 376-0394 Description of Tank(s): Tank # Capacity (gallons) Type Previous Contents AST 275 Steel Heating oil Tank Owner’s Authorized Representative Certification: The undersigned certifies that the above listed storage tank(s) have been removed from the premises of the tank owner and transferred to CMC Recycling in Burlington, North Carolina for recycling. Robert A. Payne 12/8/22 Printed Name Signature Date Cedar Rock ENVIRONMENTAL 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.