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Work Plan, PFAS Site Inspection <br />Naval Computer and Telecommunications Station Stockton, California Table of Contents <br /> v DCN: TRBW-0202-5183-0010 <br />Table of Contents <br />Acronyms and Abbreviations ..................................................................................................... vii <br />Section 1 Introduction ........................................................................................................1-1 <br />1.1 Authorization ...............................................................................................1-1 <br />1.2 Project Goal and Scope of Work .................................................................1-1 <br />1.3 Work Plan Organization ..............................................................................1-1 <br />1.4 Project Management Organization ..............................................................1-2 <br />Section 2 Background Information ...................................................................................2-1 <br />2.1 Physical Setting...........................................................................................2-1 <br />2.1.1 Site Location, Current and Future Land Use ....................................2-1 <br />2.1.2 Climate ............................................................................................2-1 <br />2.1.3 Topography and Drainage ...............................................................2-1 <br />2.1.4 Geology and Hydrogeology .............................................................2-2 <br />2.1.5 Water Sources .................................................................................2-3 <br />2.2 Ecological Setting ........................................................................................2-3 <br />2.3 Regulatory Setting .......................................................................................2-3 <br />2.4 Historical Setting .........................................................................................2-4 <br />2.4.1 Facility History and Past Site Use ....................................................2-4 <br />2.4.2 Previous Investigations ....................................................................2-5 <br />2.5 Conceptual Site Model ..............................................................................2-10 <br />2.5.1 Contaminant Source Area..............................................................2-10 <br />2.5.2 Contaminant Migration Pathways ..................................................2-11 <br />2.5.3 Potential Receptors and Exposure Pathways ................................2-11 <br />2.5.4 Future Land Use ............................................................................2-12 <br />Section 3 Technical Approach...........................................................................................3-1 <br />3.1 Scope and Rationale ...................................................................................3-1 <br />3.2 Pre-Work Notifications and Permitting .........................................................3-2 <br />3.3 General Work Requirements .......................................................................3-2 <br />3.3.1 Authorization and Plan Compliance .................................................3-2 <br />3.3.2 Pre-Work Inspection and Minimization of Property Disturbance .......3-3 <br />3.3.3 Site Safety and Health .....................................................................3-3 <br />3.3.4 Data Management Practices ............................................................3-3 <br />3.3.5 Equipment Decontamination ............................................................3-4 <br />3.3.6 Investigation-Derived Waste Management ......................................3-4 <br />3.4 Drilling, Lithologic Logging, and Sampling ...................................................3-4 <br />3.4.1 Soil Borings and Subsurface Soil Sample Collection .......................3-4 <br />3.4.2 Direct Push Groundwater Sampling .................................................3-5 <br />3.4.3 Groundwater Quality Monitoring and Groundwater Sampling ..........3-5