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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.