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2025 Annual Corrective Action Evaluation Report <br /> <br />www.arcadis.com <br />Forward Landfill 2025 Annual CA Eval Rpt_08012025(1) i <br />Contents <br />Acronyms and Abbreviations ................................................................................................................................ iii <br />1 Introduction ...................................................................................................................................................... 1 <br />2 Corrective Actions ........................................................................................................................................... 1 <br />3 Evaluation Procedures .................................................................................................................................... 2 <br />4 Corrective Action Evaluation ......................................................................................................................... 3 <br />4.1 Total Volatile Organic Compound Mass Threshold Limit ................................................................... 3 <br />4.2 Total Volatile Organic Compound Mass Trends .................................................................................. 3 <br />4.3 Individual Well TVOC Concentrations ................................................................................................... 4 <br />5 Corrective Action Operation and Maintenance ............................................................................................ 5 <br />5.1 Condition of Landfill Cover .................................................................................................................... 5 <br />5.2 Landfill Gas Monitoring Results ............................................................................................................ 6 <br />5.3 Groundwater Treatment .......................................................................................................................... 6 <br />6 Comparison of Current to Historical Groundwater Quality ......................................................................... 7 <br />7 Corrective Action Evaluation Summary ...................................................................................................... 10 <br />7.1 Corrective Action Evaluation ............................................................................................................... 10 <br />7.2 General Site Summary .......................................................................................................................... 10 <br />8 Conclusions ................................................................................................................................................... 11 <br />9 References ..................................................................................................................................................... 11 <br /> <br />Tables <br />Table 1. TVOC Threshold Limits <br />Table 2. Third Quarter 2024 Groundwater VOC Results <br />Table 3. Fourth Quarter 2024 Groundwater VOC Results <br />Table 4. First Quarter 2025 Groundwater VOC Results <br />Table 5. Second Quarter 2025 Groundwater VOC Results <br />Table 6. Third Quarter 2024 TVOC Mass Estimations Calculations <br />Table 7. Fourth Quarter 2024 TVOC Mass Estimations Calculations <br />Table 8. First Quarter 2025 TVOC Mass Estimations Calculations <br />Table 9. Second Quarter 2025 TVOC Mass Estimations Calculations