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TABLE OF CONTENTS <br /> Page <br /> PROFESSIONAL CERTIFICATION <br /> EXECUTIVE SUMMARY . . . . . . . . . . . . . . . . . . E-1 <br /> 10 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 <br /> 1.1 Purpose . . - . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 <br /> 1.2 Site Location . . . . . . . . . . . . . . . . . 1-1 <br /> 1.3 Site History . . - . . . . . . . . . . . . . . . . . . . . 1-1 <br /> 14 Site Geology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 <br /> 1.5 Site Hydrogeology . . . . . . . . . . 1-4 <br /> 16 Report Organization . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 <br /> 2 0 SOIL EXCAVATION . . . . . . . . . . . . 2-1 <br /> 21 Excavation and Segregation of Impacted Soil . . . . . . . . . . . . . 2-1 <br /> 211 Excavation of Former Underground Storage Tank <br /> Locations . . . . . . . 2-1 <br /> 212 Confirmation Sampling and Analysis . . . . . . . . . 2-2 <br /> 2.1.3 North and South Pit Backfill . . . . 2-3 <br /> 22 Investigation and Excavation at Former Fuel Dispenser Island 2-3 <br /> 221 Investigation Activities - . . . . . . . . . . . . . . . . 2-3 <br /> • <br /> 2.22 Excavation of Dispenser Island Area . • • : • • : • 2-`1 <br /> 223 Confirmation Sampling and Analyses 2-4 <br /> 2 2 4 Fuel Dispenser Island Excavation Backfilling 2-5 <br /> 23 Soil and Air Monitoring . . 2-5 <br /> 2 3.1 Soil Monitoring . . . . . . . . . . . . . . 2-6 <br /> 2.3 2 Air Monitoring . . . . . . . . . . . . 2-6 <br /> 3 0 SOIL REMEDIATION . . . . . . . . . 3-1 <br /> 31 On-Site Remedial Treatment . . . . . 3-1 <br /> 3 1.1 Treatment Pile Construction and System Installation 3-1 <br /> 3.12 Treatment Monitoring • . • • • 3-2 <br /> 31.3 Confirmation Sampling and Analyses - 3-2 <br /> 3.2 Vapor Extraction/Injection System . . . . . 3-3 <br /> 4.0 GROUNDWATER INVESTIGATION AND MONITORING . . 4-1 <br /> 4.1 Groundwater Monitoring System Improvements . . . 4-1 <br /> 42 Groundwater Monitoring Well Replacement . . - 4-1 <br /> 4.3 Groundwater Sampling and Analyses - 4-2 <br /> 5 0 CONCLUSIONS 5-1 <br /> 5.1 Site Conditions 5-1 <br /> 52 Soil Removal and Soil Remediation • - - • • • 5-1 <br /> 53 Groundwater Monitoring • • 5-2 <br /> 4b <br /> FASCLOSE CON -ui 92-1177102 36 <br />