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Water Quality Monitoring Report <br />First Quarter 2024 <br />www.arcadis.com <br />Forward Landfill 1Q24 Water Quality Mon Report_05012024 i <br />Contents <br />Acronyms and Abbreviations ................................................................................................................................. v <br />1 Introduction ...................................................................................................................................................... 1 <br />2 Monitoring Results .......................................................................................................................................... 1 <br />2.1 Groundwater Monitoring ......................................................................................................................... 1 <br />2.1.1 Monitoring Network ............................................................................................................................. 1 <br />2.1.2 Sampling and Laboratory Analysis ................................................................................................... 3 <br />2.1.3 Groundwater Elevations and Contours ............................................................................................. 4 <br />2.1.4 Detection Monitoring Program, Forward Unit ................................................................................... 4 <br />2.1.5 Detection Monitoring Program, Austin Road Unit............................................................................ 5 <br />2.1.6 Quality Assurance/Quality Control Results ...................................................................................... 5 <br />Forward Unit ..............................................................................................................................6 <br />Austin Road Unit .......................................................................................................................6 <br />2.2 Unsaturated Zone Monitoring ................................................................................................................ 7 <br />2.2.1 Monitoring Program ............................................................................................................................ 7 <br />2.2.2 Quarterly Results ................................................................................................................................. 7 <br />2.3 Leachate Monitoring, Seep Monitoring, and Leachate Collection and Removal System Testing .. 7 <br />2.3.1 Leachate Monitoring ............................................................................................................................ 7 <br />2.3.2 Seep Monitoring ................................................................................................................................... 8 <br />2.3.3 Leachate Collection and Removal System Testing ......................................................................... 8 <br />2.4 Surface Water Monitoring ....................................................................................................................... 8 <br />2.4.1 Monitoring Program ............................................................................................................................ 9 <br />2.4.2 Quarterly Results ................................................................................................................................. 9 <br />2.5 Landfill Gas Monitoring........................................................................................................................... 9 <br />2.5.1 Landfill Gas Collection and Control System Operation Monitoring ............................................. 10 <br />2.5.2 Perimeter Monitoring and On-Site Structure Testing .................................................................... 10 <br />2.6 Site Monitoring ....................................................................................................................................... 10 <br />2.6.1 Site History ......................................................................................................................................... 11 <br />2.6.2 Waste Types and Quantities ............................................................................................................. 11 <br />2.6.3 Standard Observations ..................................................................................................................... 12 <br />2.6.4 Quarterly Compliance ....................................................................................................................... 12