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Quarterly Monitoring Report – Third Quarter 2025 <br />www.arcadis.com <br />Forward Landfill 3Q25 Quarterly Mon Report 13 <br />x Analytical results from site monitoring wells during third quarter 2025 are consistent with historical trends. <br />x Surface water samples were collected from two of the four surface water monitoring locations during third <br />quarter 2025. <br />x For unsaturated-zone monitoring locations, three suction lysimeters (FU-04W-B, LY-A, and LY-Pond-N) <br />contained sufficient liquid for analysis of VOCs (Table 5a). The samples did not contain sufficient liquid for <br />analysis of inorganic parameters. <br />6 References <br />Arcadis. 2024. Forward Landfill Water Quality Monitoring Report – Second Quarter 2024, Forward Landfill, San <br />Joaquin County, California. August 1. <br />Arcadis 2025a. Monitoring Well Installation and Abandonment Report – Forward Landfill, 9999 South Austin <br />Road, Manteca, California. April 1. <br />Arcadis. 2025b. Annual Monitoring and Maintenance Report – 2024, Forward Landfill, San Joaquin County, <br />California. April 1. <br />Arcadis. 2025c. Revised Quarterly Monitoring Report – Fourth Quarter/Annual 2025, Forward Landfill, San <br />Joaquin County, California. June 26. <br />Arcadis. 2025d. Quarterly Corrective Action Progress Report – Third Quarter 2025, Forward Landfill, 9999 S. <br />Austin Road, Manteca, California. October 15. <br />Arcadis. 2025e. Groundwater Treatment System Monitoring Report – Third Quarter 2025, Forward Landfill, <br />9999 S. Austin Road, Manteca, California. October 31. <br />California Water Boards. 2020. General Waste Discharge Requirements for Commercial Composting Operations <br />State Water Resources Control Board Order WQ 2020-0012-DWQ-R5S013. April 7. <br />Forward. 2009. Forward Landfill Odor Control Management Plan. April. <br />Forward. 2017. Leachate Recirculation Plan. March 6. <br />Forward. 2025. Letter from O. Cordero (Forward) to B. Kenny (RWQCB) re: Forward Landfill – Third Quarter 2025 <br />Exceedances of Concentration Limits. Forward Landfill. October 29. <br />RWQCB. 2003. Order No. R5-2003-0080 Waste Discharge Requirements for Forward Inc. and Republic Services <br />Inc. Forward Landfill, San Joaquin County. May 8. <br />RWQCB. 2014. Order No. R5-2014-0006 Waste Discharge Requirements for Forward Inc. and Republic Services <br />Inc. Forward Landfill, San Joaquin County. February. <br />RWQCB. 2017a. Cleanup and Abatement Order (CAO; R5-2017-0703) for Forward Inc. and Republic Services, <br />Inc. Forward Landfill, San Joaquin County. April. <br />RWQCB. 2017b. Water Code Section 13267 Order for Technical Reports Regarding Acceptance of Hazardous <br />Waste, Forward Landfill, San Joaquin County. May 16.