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Progress Report—Additional Site Investigation for PFAS BSK Project E2001601F <br /> Stockton Metropolitan Airport August 15, 2024 <br /> Stockton, California Page 3 <br /> CLOSING <br /> We appreciate the opportunity to assist you with this project. If you have any questions, please contact <br /> Tony Martin at (916) 517-2122. <br /> Respectfully submitted, 0 AL <br /> BSK Associates cis i_ HO'V a <br /> I� ,Q- <br /> X � N0.67B8 (� <br /> L d <br /> U UP.. , G <br /> Sarah Stephenson, PE Robert"Tony" Martin, PG <br /> 'q <br /> Senior Engineer Principal Geologist/ �OFC� <br /> Environmental Discipline Lead <br /> MA/RTM <br /> Attachments: Table 1—Analytical Results Summary for Soil-PFAS <br /> Table 2—Analytical Results Summary for Groundwater and Quality Control Samples-PFAS <br /> Table 3—Analytical Results Summary for Groundwater—General Chemistry and Metals <br /> Table 4—Groundwater Monitoring Well Construction Details <br /> Figure 1-Vicinity Map <br /> Figure 2—Site Plan <br /> Figure 3—AFFF Use Areas and Potential Release Areas <br /> Figure 4—Sensitive Receptors <br /> Figure 5—Proposed Sample Locations Potential Release Area 1—Wash Rack <br /> Figure 6—Proposed Sample Locations Potential Release Area 2—Former Runway <br /> Figure 7—Proposed Sample Locations Potential Release Area 3—Atlantic Aviation Hangar <br /> Figure 8-June 25,2024 Groundwater Isocontours <br /> Figure 9—Proposed Additional Monitoring Wells <br /> Attachment A—Boring Logs/Monitoring Well Sampling Logs <br /> Attachment B—Analytical Reports <br /> cc: Ms.Xueyuan Yu, Ph.D., PE <br /> Central Valley Regional Water Quality Control Board <br /> 11020 Sun Center Drive#200 <br /> Rancho Cordova, CA 95670 <br /> Bzi<' <br />