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Geosyntec <br /> consultants <br /> TABLE OF CONTENTS <br /> 1. INTRODUCTION....................................................................................................................1 <br /> 1.1 Work Plan Organization..................................................................................................1 <br /> 2. SITE BACKGROUND.............................................................................................................2 <br /> 2.1 Location and Historical Use............................................................................................2 <br /> 2.2 Hydrogeology..................................................................................................................2 <br /> 2.3 Results of Previous Investigations and Site Remedial Activities....................................2 <br /> 2.4 Off-Site COC Concentrations and Potential Vapor Intrusion Risk.................................3 <br /> 3. INVESTIGATION OBJECTIVES AND APPROACH...........................................................4 <br /> 4. FIELD ACTIVITES .................................................................................................................6 <br /> 4.1 Pre-Field Activities..........................................................................................................6 <br /> 4.2 Soil Vapor Probe Installation..........................................................................................6 <br /> 4.3 Soil Physical Properties Sampling ..................................................................................7 <br /> 4.4 Soil Vapor Sampling.......................................................................................................7 <br /> 4.4.1 Sampling Equipment...........................................................................................7 <br /> 4.4.2 Shut-In Testing....................................................................................................7 <br /> 4.4.3 Leak Testing........................................................................................................8 <br /> 4.4.4 Purge and Sampling Rate....................................................................................8 <br /> 4.4.5 Soil Vapor Sampling and Analysis .....................................................................8 <br /> 4.5 Groundwater Sampling....................................................................................................8 <br /> 4.5.1 Depth to Groundwater Measurements.................................................................8 <br /> 4.5.2 Groundwater Sampling........................................................................................9 <br /> 4.6 Laboratory Analysis and Data Validation.......................................................................9 <br /> 4.6.1 Soil Samples........................................................................................................9 <br /> 4.6.2 Soil Vapor Samples.............................................................................................9 <br /> 4.6.3 Groundwater Samples .......................................................................................10 <br /> 4.7 Investigation-Derived Waste.........................................................................................10 <br /> 5. REPORTING AND SCHEDULE..........................................................................................11 <br /> 6. REFERENCES .......................................................................................................................12 <br /> Work Plan For Vapor Intrusion Investigation i July 30,2021 <br />