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HomeMy WebLinkAboutMO-29960_49046_CA_O_20230607_UST InspectionCedar Rock ENVIRONMENTAL June 7, 2023 Ms. Cynthia Schwartz 2154 N. Pollard Street Arlington, VA 22207 CEDAR ROCK ENVIRONMENTAL, P.C. 107 Pioneer Trail Graham, NC 27253 (336) 684-2734 Reference: Inspection of an underground storage tank (UST) located at 421 Rensselaer Avenue, Charlotte, North Carolina Cedar Rock Project # 366622590 Dear Ms. Schwartz: Cedar Rock Environmental, P. C. (Cedar Rock) performed a site inspection on June 7, 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 1931. The UST would have most likely been installed sometime in the 1950s. 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, however, the vent pipe was missing its cap. The depth to the top of the UST is approximately 20 inches below land surface (bls). The UST has a length of about 92 inches with a diameter of approximately 41.25 inches and a capacity of about 560 gallons. The UST was observed to be dry containing no fluids. White flagging was installed to mark the ends of the UST (see Photo). 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. No copper fuel delivery/return lines, petroleum odors or stains were observed in the basement/crawlspace, however, the crawlspace had plastic on the floor. Once the orientation of the UST was determined, a soil boring was performed at the northeastern end of the UST using a 3.25-inch diameter stainless steel hand auger. The soil boring was advanced to a depth of approximately 5.5 feet bls, about 0.4 feet below the bottom of the UST. A strong petroleum odor and discoloration was observed in the soils from a depth of approximately 4.5 to 5.5 feet bls suggesting significant leakage from the UST has occurred. The native soils underlying the UST consist of an orange, brown sandy silt. One soil sample, CR-1, was collected from the base of the boring and can be submitted for laboratory analysis, if required. 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 soils 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 to the North Carolina Department of Environmental Quality (DEQ), Division of Waste Management, Mooresville Regional Office (704-663-1699). 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 request by the property owner, Cedar Rock will submit a UST-61 form to satisfy the State's notification requirement for the release. Ms. Cynthia Schwartz June 7, 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 prohibit 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 soils 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 the 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 and fuel line 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 $4,000.00 plus $1.50 per gallon of recovered fluids. Preparing and filing the NRP and performing the Public Notification requirement will cost an additional $1,250.00. The total project cost should not exceed $5,310.00. 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 336-684-3836. Sincerely, 6� Josiah D. Payne, N.C. Licensed Geologist #2825 Attachment Ms. Cynthia Schwartz June 7, 2023 Page 3 Photo. View of the UST location. Both ends of the UST are marked with white flags. 1 inch = 10 feet PROJECT: 421 Rensselaer Avenue Property CEDAR ROCK INCIDENT#: Pending ENVIRONMENTAL, P. C. LOCATION: 421 Rensselaer Avenue • Sample Location (CR-1) T1 = 560-Gallon UST L---- SITE MAP Charlotte, Mecklenburg Co. FILENAME: 3666-Figl.tcw CRE PROJECT NUMBER: 366622590VERSION DATE: 6n/2023 FIGURE 1 Beverly, Trudy From: Beverly, Trudy Sent: Thursday, June 8, 2023 6:29 AM To: Damien Callaghan Cc: Josiah Payne; Bob Payne Subject: RE: [External] UST-61 form submission for the Patricia Cowden Boyd Revocable Trust Property, 421 Rensselaer Ave, Charlotte, Mecklenburg Co. Received. Trudy z�D-�EQ7> rFi ' m4 Ou81Y�� 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.Beverlykdeq.nc.. og_v 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: https:Hdeg.nc.gov/about/divisions/waste-management/ust Branch's Above Ground Storage Tanks Website Address: hit2s://deq.nc.gov/about/divisions/waste-management/ust/ast-program INTERACTIVE MAPS WITH DWM SITES AND PERMITTED FACILITIES: https://deg.nc.gov/about/divisions/waste-management/waste-management-rules-data/waste-mana eg ment- ig s=mates File Review Procedures: https: //deq.nc. gov/about/divisions/waste-management/ust/file-review-procedures#mooresville-regional-office ONLINE ACCESS TO UST SECTION DOCUMENTS (Laserfiche): https://deq.nc.gov/about/divisions/waste-manaizement/laserfiche Document Submittal & UST File Names for Laserfiche Policies: https://files.nc.¢ov/ncdea/Waste%20Mana¢ement/DWM/UST/W hatsNew/Final-Electronic-Document-Submittal-Policv.odf https:Hfiles.nc.gov/ncdeq/Waste%20Management/DWM/UST/Corrective%2OAction/UST%2Ofile°/a20names°/`20for%2OLaserfiche.docx From: Damien Callaghan <damienjc@gmail.com> Sent: Wednesday, June 7, 2023 8:36 PM To: Beverly, Trudy <trudy.beverly@deq.nc.gov> Cc: Josiah Payne <josiah.cre@gmail.com>; Bob Payne <cedarrockenv@gmail.com> Subject: [External] UST-61 form submission for the Patricia Cowden Boyd Revocable Trust Property, 421 Rensselaer Ave, 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 property with a copy of our inspection report. Damien Callaghan Cedar Rock Environmental