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Mr. Himanshu H. Mehta, P.E. 20 December 2024 Page 2 PROJECT BACKGROUND The IRCL site is located south of Oslo Road, west of Range Line Road (74th Avenue) and east of Interstate 95 in Section 25, Township 33 South, Range 38 East in Indian River County, Florida. The IRCL site occupies 276 acres, with approximately 141.5 acres permitted for Class I disposal, 22 acres is comprised of Cell l C&D debris disposal facility, and 2.5 acres consists of a C&D debris recycling facility. The Class I landfill currently accepts both Class I waste and C&D debris for disposal under the Florida Department of Environmental Protection (FDEP) Construct and Operate Permit Modification Nos. 0128769-026-SC-IM and 0128769-033-SO-MM, dated November 30, 2022 (Class I Permit). The C&D debris disposal facility operates under FDEP Permit No. 0128769- 032-SO-24, dated June 1, 2022 (C&D Permit). Semi Annual Water puality Compliance Monitoring and Reporting The Water Quality Monitoring Plan (WQMP) for each of the IRCL facilities permits (which is listed as Appendix 3 of each permit) indicates that groundwater and surface water quality monitoring are required. Semi-annual sampling of the Class I landfill and C&D debris disposal facility groundwater monitoring wells shall be conducted in January and July 2025. The samples collected from the Class I landfill and C&D debris disposal facility monitoring wells shall be analyzed for the routine monitoring parameters listed in Section II.3 (Class I Permit) and Paragraph 8 (C&D Permit) of the WQMP, respectively, as required by paragraphs 62- 701.510(5)(c) & (7)(a) and 62-701.730(8)(d), Florida Administrative Code (F.A.C.). Samples from one surface water monitoring site (SW-2) shall be collected semi-annually in January and July, if water is discharging from the stormwater pond. The samples, if collected, shall be analyzed for the list of parameters listed in Section III.2 of the Class I Landfill WQMP, as required by paragraphs 62-701.510 (5)(d) and (7)(b), F.A.C. Geosyntec will perform the field sampling activities, and the analytical testing will be conducted by Eurofins Scientific Laboratory (Eurofins), the analytical laboratory contracted with, and direct bill to, SWDD. The results of the semi-annual water-quality monitoring events are to be reported to the FDEP within 60 days of receipt of analysis from the laboratory. Ouarterly Assessment Monitoring for the C&D Debris Disposal Facility Geosyntec understands that results of routine sampling of C&D debris disposal facility groundwater monitoring well (MW-21 S) in January 2017 indicated exceedances of benzene and sodium groundwater cleanup target levels (GCTLs). As a result, the SWDD was requested by the FDEP to initiate evaluation monitoring in accordance with subsection 62-701.510(6), F.A.C. NCP2323548/JL23073 2025 Compliance Monitoring Proposal engineers I scicrttists I innovalors