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Quarterly Monitoring Report – Third Quarter 2025 <br />www.arcadis.com <br />Forward Landfill 3Q25 Quarterly Mon Report i <br />Contents <br />Acronyms and Abbreviations ................................................................................................................................ iv <br />1 Introduction ...................................................................................................................................................... 1 <br />2 Detection Monitoring Program Results ......................................................................................................... 1 <br />2.1 Groundwater Monitoring ......................................................................................................................... 1 <br />2.1.1 Monitoring Network ............................................................................................................................. 1 <br />2.1.2 Field Activities ..................................................................................................................................... 2 <br />2.1.3 Analytical Results ................................................................................................................................ 2 <br />2.1.4 Quality Assurance/Quality Control Results ...................................................................................... 4 <br />2.2 Unsaturated Zone Monitoring ................................................................................................................ 4 <br />2.2.1 Monitoring Program ............................................................................................................................ 4 <br />2.2.2 Quarterly Results ................................................................................................................................. 5 <br />2.3 Surface Water Monitoring ....................................................................................................................... 5 <br />2.3.1 Monitoring Program ............................................................................................................................ 5 <br />2.3.2 Quarterly Results ................................................................................................................................. 6 <br />3 Corrective Action Monitoring Program ......................................................................................................... 6 <br />3.1 Groundwater Corrective Action ............................................................................................................. 6 <br />3.2 Unsaturated Zone Corrective Action ..................................................................................................... 7 <br />3.3 Groundwater Extraction Treatment System ......................................................................................... 7 <br />3.4 Landfill Gas Corrective Action ............................................................................................................... 7 <br />4 Additional Facility Monitoring ........................................................................................................................ 8 <br />4.1 Leachate Monitoring and Leachate Collection and Removal System Testing.................................. 8 <br />4.1.1 Leachate Monitoring ............................................................................................................................ 8 <br />4.1.2 Leachate Collection and Removal System Testing ......................................................................... 8 <br />4.1.3 Leachate and Surface Impoundment Monitoring ............................................................................. 9 <br />4.2 Leachate Seep Monitoring ...................................................................................................................... 9 <br />4.3 Cannery Waste Land Application Monitoring ..................................................................................... 10 <br />4.3.1 Cannery Waste Land Application Area Groundwater Monitoring Program ................................ 10 <br />4.3.2 Quarterly Results ............................................................................................................................... 10 <br />4.4 Site Monitoring ....................................................................................................................................... 10 <br />4.4.1 Waste Types and Quantities ............................................................................................................. 11