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TO: Mr. Bruce Woody <br />Orange County Solid Waste Management <br />FROM: Deborah Coakley, Sean Jarvah, Bilgen Yuncu <br />Environmental Services Division <br />DATE: 06/03/25 <br />SUBJECT: Groundwater Monitoring Program (FY 2025-2026) <br />OCSWM Active C&D Landfill: <br />TRC Project No. TBD <br />TRC Engineers, Inc., (formerly Draper Aden Associates) proposes to provide professional environmental <br />services to Orange County Solid Waste Management (OCSWM) pertaining to the groundwater monitoring <br />and corrective action program at the Active C&D Landfill, in accordance with an existing Services <br />Agreement between OCSWM and TRC. <br />The subject proposal is intended to encompass services that will be provided to conduct the Fall 2025 and <br />Spring 2026 groundwater sampling/reporting events (July 1, 2025 through June 30, 2026). <br />This proposal is restricted to services to be provided for the active C&D Landfill. Specific tasks to be <br />performed during the service period are detailed as follows. <br />Task-01 - Groundwater Sampling Event 41 (Event 2025 S2) <br />TRC proposes to conduct groundwater sampling event 39 at the Orange County Regional Landfill – Active <br />C&D Facility during November 2025. <br />TRC shall coordinate field and laboratory services, obtain groundwater samples, review sampling <br />documentation received from groundwater sampling personnel, chemically analyze groundwater samples <br />(Eurofins), validate analytical data provided by the contracted laboratory, update historical summary tables, <br />and prepare a report suitable for direct submission to NCDEQ. <br />During the subject sampling event, the laboratory will analyze: <br />▪samples obtained from four compliance wells (6804-MW204S, 6804-MW209, 6804-MW210D, <br />6804-MW211R) for the constituents listed in Appendix I, one of the constituents listed in <br />Appendix II (mercury), and several parameters that are unique to C&D facilities (manganese, iron, <br />tetrahydrofuran, total dissolved solids, chloride, alkalinity, sulfate). <br />▪additional samples obtained from well 6804-MW-204S for quality control parameters (MS/MSD) <br />Docusign Envelope ID: F108C395-3F4F-4103-AF33-FCBEC4DCBF7F