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Workplan for PFAS Sampling and Analysis Project Number:60657245 <br /> Table of Contents <br /> 1. Introduction and Site Background....................................................................................................................4 <br /> 1.1 Site Description....................................................................................................................................4 <br /> 1.2 Geology................................................................................................................................................4 <br /> 1.3 Hydrogeology.......................................................................................................................................5 <br /> 1.4 Pathways and Receptors......................................................................................................................5 <br /> 2. PFAS Storage and Usage History....................................................................................................................7 <br /> 2.1 Storage and Handling Locations............................................................................................................7 <br /> 2.1.1 Fixed Fire Suppression Systems.............................................................................................7 <br /> 2.1.2 Foam Monitors........................................................................................................................7 <br /> 2.2 Potential Foam Usage Areas.................................................................................................................7 <br /> 3. PFAS Sampling and Analysis..........................................................................................................................8 <br /> 3.1 PFAS Sampling Locations and Rationale...............................................................................................8 <br /> 3.1.1 Soil and Groundwater Sampling..............................................................................................8 <br /> 3.2 Sampling..............................................................................................................................................8 <br /> 3.2.1 Sample Identification...............................................................................................................9 <br /> 3.2.2 Sample Handling ....................................................................................................................9 <br /> 3.3 Investigation-Derived Waste(IDW)........................................................................................................9 <br /> 4. Reporting..................................................................................................................................................... 10 <br /> 5. References....................................................................................................................................................11 <br /> Figures <br /> Figure 1-1 Site Location Map <br /> Figure 1-2 Site Map <br /> Figure 1-3 Site Vicinity Map <br /> Figure 1-4 Stockton Terminals Technical Committee Groundwater Monitoring Well Network <br /> Figure 1-5 A-Zone Aquifer Groundwater Elevation Contour Map <br /> Figure 1-6 Nearby Sensitve Receptors Map <br /> Figure 2-1 Potential PFAS Source Locations, West Terminal <br /> Figure 2-2 Potential PFAS Source Locations, East Annex <br /> Figure 3-1 Proposed PFAS Sampling Locations, East Annex <br /> Figure 3-2 Proposed PFAS Sampling Locations, West Terminal <br /> Table <br /> Table 3-1 Summary of Proposed Sampling Locations and Rationale <br /> Appendix <br /> Appendix A Programmatic Sampling and Analysis Plan <br /> Prepared for:Tesoro Logistics Operations LLC AECOM <br />