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(MM PEA Work Plan <br /> Martin Metals Finishing Inc. (Former) <br /> Stockton, California <br /> TABLE OF CONTENTS <br /> 1 INTRODUCTION 1 <br /> 2 PROJECT BACKGROUND 2 <br /> 2.1 Purpose 2 <br /> 2.2 Site Description and Use 2 <br /> 2.3 Site Geology and Hydrogeology 2 <br /> 2.4 Site History 3 <br /> 2.5 Previous Investigations 3 <br /> 2.5.1 Preliminary Assessment 3 <br /> 2.5.2 Sampling Activities and Results 5 <br /> 3 SCOPE AND OBJECTIVES 7 <br /> 3.1 Preliminary Conceptual Site Model 7 <br /> 3.2 Identified Data Gaps 8 <br /> 3.3 Data Quality Objectives 8 <br /> 3.4 Scope of Work 9 <br /> 4 FIELD OPERATIONS 10 <br /> 4.1 Pre-Field Activities 10 <br /> 4.2 Field Sampling 10 <br /> 4.2.1 Storm Drain Condition Assessment 10 <br /> 4.2.2 Sampling Locations and Intervals 10 <br /> 4.2.3 Trench Sediment Sampling 12 <br /> 4.2.4 Subsurface Soil Sampling 12 <br /> 4.2.5 Shallow Soil Sampling 13 <br /> 4.2.6 Subs/ab Soil Vapor Sampling 13 <br /> 4.2.7 Dual-Nested Soil Vapor Wells 13 <br /> 4.2.8 Location Surveying 14 <br /> 4.3 Laboratory Analysis 14 <br /> 4.4 Quality Assurance/Quality Control Plan 14 <br /> 4.5 Health and Safety Plan 15 <br /> 4.6 Decontamination 15 <br /> Pagei <br />