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HomeMy WebLinkAbout1304_Cabarrus_CharlotteMotorSpeedwayV_MSWLF_Permit_GeologicPhase3Cell2M_FID1657696_20220325Environmental Consultants & Contractors March 24, 2022 File No. 02218304.03 Ms. Jaclynne Drummond North Carolina Department of Environmental Quality 2009 U.S. Highway 70 Swannanoa, NC 28778 Subject: Report of Geologic Observation Phase 3 - Cell 2M Construction Charlotte Motor Speedway Landfill - V (MSWLF) Permit No. 1304-MSWLF-1992 Cabarrus County, North Carolina Dear Ms. Drummond: SCS Engineers, PC (SCS), on behalf of Atlantic Coast Consulting, Inc. and BFI Waste Systems of North America, LLC (a wholly owned subsidiary of Republic Services, Inc.), submits this Report of Geologic Observation for Cell 2M at the Charlotte Motor Speedway (CMS) Landfill - V. Cell 2M is a 6.6-acre cell located south of existing Cell 2K. At this time, all 6.6 acres have been excavated to design subgrade elevations and are ready for placement of the low -permeability soil liner. For preparation of this report, the Phase 3 Design Hydrogeologic Report dated May 2009, prepared by David Garrett and Associates was reviewed. This Report contains information on the geology and hydrogeology conditions within Phase 3, including Cell 2M, that we compared our findings to. GEOLOGIC OBSERVATION The following is a summary of the geologic field observations by Mr. Jared Hamela P.G., a licensed NC geologist, on March 21, 2022. This was peformed to fulfill the number 9 paragraph condition of the Attachment 2 Conditions of Permit Approval to Construct Phase 3 Cell 2M (File ID: 1450556). • Contractor excavation has revealed no rock formations within Cell 2M footprint. • No blasting of rock was required in this area. • No remnant cobbles or boulders were visible. • Soils observed included tan, red -brown, sandy silts and silty clays (ML and CL), residuum from gabbro and syenite parent material consistent with the Concord Pluton of the Charlotte Belt. • No perched groundwater was encountered in Cell 2M. No evidence of a spring, seep, or other artesian conditions were observed. The geology of the cell area of the cell observed appears to be consistent with the observations and geologic evaluations documented in the design Hydrogeologic report cited above. A photographic log of the field observations is provided as Attachment A. No geologic features (i.e. pinnacles or tors) above the constructed cell subgrade established by the contractor were observed. The cells exposed 2520 Whitehall Park Drive, Suite 450, Charlotte, NC 28273 1 704-504-3107 Ms. Jaclynne Drummond March 24, 2022 Page 2 conditions appear consistent with the expectations identified in the permit documents and conditions reported in previous cells. It is our recommendation that no modifications be made to the Groundwater Monitoring Plan or cell base grades, and no geologic features are present in that would impact the construction or operation of Cell 2M. This report will be presented as a component of the Construction Quality Assurance (CQA) report for the cell. If you have questions, please do not hesitate to contact either of the undersigned at (704) 504-3107. Sincerely, Jared T. Hamela, PG Senior Project Geologist SCS ENGINEERS, PC jth/adg/scl Enclosure: Attachment A - Photographic Log Steven C. Lamb, PE Project Director/Vice President SCS ENGINEERS, PC cc: Mike Gurley - Environmental Manager, Republic Services, Inc. Taylor Herbertson - Atlantic Coast Consulting, Inc. "fjoi l golf l N art"", C A R `,,, �,,." d .. NSFQ SEAL t Ctr r 0 IL 1-4 a312WZ M:\PROJECT FILES\02218304.03\Deliverables\1304 - CMS - Phase 3 Cell 2M - Geologic observation v.2.2.docx Attachment A Photographic Log Northern Boundary of Cell 2M facing southeast Northern Boundary of Cell 2M facing south-southeast Charlotte Motor Speedway Landfill V Project Number: Permit # 1304-MSWLF-1992 02218304.03 Cell 2M 5105 Morehead Road Page 1 - 03/21 /2022 Concord, NC 28027 Northern Boundary of Cell 2M facing south Northern Boundary of Cell 2M facing southwest Charlotte Motor Speedway Landfill V Project Number: Permit # 1304-MSWLF-1992 02218304.02 Cell 2M 5105 Morehead Road Page 2 - 03/22/2022 Concord, NC 28027