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Geosynte& <br /> consultants <br /> TABLE OF CONTENTS <br /> 1. INTRODUCTION....................................................................................................................1 <br /> 1.1 Purpose and Objectives...................................................................................................1 <br /> 1.2 UST 817B Background...................................................................................................1 <br /> 1.3 Site Hydrogeology...........................................................................................................2 <br /> 1.3.1 Groundwater Monitoring Results for August 2021.............................................3 <br /> 2. INVESTIGATION ACTIVITES..............................................................................................4 <br /> 3. INVESTIGATION WORK PLAN...........................................................................................5 <br /> 3.1 Pre-field Activities ..........................................................................................................5 <br /> 3.2 Field Activities................................................................................................................5 <br /> 3.2.1 Drilling and Sampling.........................................................................................5 <br /> 3.2.2 Sample Labeling, Handling, and Analysis..........................................................6 <br /> 3.2.3 Equipment Decontamination Procedures............................................................8 <br /> 3.2.4 Investigation-Derived Waste...............................................................................8 <br /> 3.3 Quality Assurance/Quality Control Procedures..............................................................9 <br /> 3.4 Data Reporting ................................................................................................................9 <br /> 4. SCHEDULE ...........................................................................................................................10 <br /> 5. REFERENCES.......................................................................................................................11 <br /> Final Investigation Work Plan Addendum—UST 817B ii June 24,2022 <br />