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Figure 3 Site Plan <br /> Figure 4 Groundwater Elevation Contour Map, Upper Horizon, First <br /> Quarter 2023 <br /> Figure 5 Groundwater Elevation Contour Map, Middle Horizon, First <br /> Quarter 2023 <br /> Figure 6 Groundwater Elevation Contour Map, Lower Horizon, First <br /> Quarter 2023 <br /> Figure 7 Groundwater Elevation Trends, February 2005-March 2023 <br /> Figure 8 Carbon Tetrachloride Concentrations, Upper Horizon, First <br /> Quarter 2023 <br /> Figure 9 Carbon Tetrachloride Concentrations, Middle and Lower <br /> Horizon First Quarter 2023 <br /> Figure 10 Carbon Tetrachloride Concentration Trends, Upper Horizon <br /> Wells, <br /> February 2005-March 2023 <br /> Figure 11 Carbon Tetrachloride Concentration Trends, Middle Horizon <br /> Wells, <br /> February 2005-March 2023 <br /> Figure 12 Carbon Tetrachloride Concentration Trends, Lower Horizon <br /> Wells, <br /> February 2005-March 2023 <br /> Figure 13 Chloroform Concentrations, Upper Horizon, First Quarter 2023 <br /> Figure 14 Chloroform Concentrations, Middle and Lower Horizon, First <br /> Quarter 2023 <br /> Figure 15 Chloroform Concentration Trends, Upper Horizon Wells, <br /> February 2005-March 2023 <br /> Figure 16 Chloroform Concentration Trends, Middle Horizon Wells, <br /> February 2005-March 2023 <br /> Figure 17 Chloroform Concentration Trends, Lower Horizon Wells, <br /> February 2005-March 2023 <br /> Figure 18 Trichloroethene Concentrations Trends, Lower Horizon Wells, <br /> February 2005-March 2023 <br /> APPENDICES <br /> Appendix A Groundwater Sample Collection Logs <br /> Appendix B Water Sample Laboratory Reports and Chain-of-Custody <br /> Forms <br /> Appendix C Historical Groundwater Elevation Data <br /> Appendix D Historical Volatile Organic Compound Concentration Data <br /> Appendix E Historical Inorganic Compound Concentration Data <br /> https://woodplc.sharepoint.com/teams/olintracy/shared documents/general/03.0 docctrl/2021 biennial report/01_text/tcy 2021 biennial_text_rev.docx <br /> Page 9 <br />