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TABLE OF CONTENTS <br /> PROBLEM ASSESSMENT REPORT AND CORRECTIVE ACTION PLAN <br /> EXECUTIVE SUMMARY I <br /> ' 10BACKGROUND 3 <br /> 1 1 Site Description and History 3 <br /> 1 2 Previous Environmental Studies 3 <br /> ' 1 3 Summary of Current Environmental Study 4 <br /> 2 0 INVESTIGATIVE METHODS 5 <br /> 2 1 Soil Borings 5 <br /> 2 2 Soil Sampling 5 <br /> 2 3 Vapor Extraction Well Construction 6 <br /> ' 2 4 Vapor Extraction Monitoring Well Construction 6 <br /> 2 5 Groundwater Monitoring Well Construction 6 <br /> 2 6 Well Development 6 <br /> ' 2 7 Analytical Methods 6 <br /> 2 8 Well Survey 7 <br /> 2 9 Vapor Extraction Pilot Test 7 <br /> ' 2 10 Waste Disposal 8 <br /> 3 0 INVESTIGATIVE FINDINGS 9 <br /> 3 1 Site Geology 9 <br /> 3 2 Site Hydrogeology 9 <br /> 3 3 Soil Sample Analytical Results 9 <br /> 3 4 Groundwater Analytical Results 10 <br /> ' 3 5 Vapor Extraction Pilot Test 10 <br /> 4 0 DATA EVALUATION AND DISCUSSION 11 <br /> 4 1 Petroleum Hydrocarbons in Soil I 1 <br /> 4 2 Vapor Extraction Pilot Test 11 <br /> 5 0 CONCLUSIONS 13 <br /> 6 0 DISCUSSION OF INTERIM SOIL REMEDIAL OPTIONS 14 <br /> ' 6 1 No Remediation Alternative 14 <br /> 6 2 Excavation of Soil 14 <br /> 6 3 On-site Soil Aeration, Off-site Soil Treatment 14 <br /> ' 6 4 Bioremediation 14 <br /> 6 5 Soil Vapor Extraction 15 <br /> 7 0 PROPOSED CORRECTIVE ACTION PLAN 16 <br /> ' 7 1 Preliminary Design Criteria 16 <br /> 7 2 Off-Gas Treatment 17 <br /> 7 3 VES Design 17 <br /> 7 4 Schedule 18 <br /> 8 0 RECOMMENDATIONS 19 <br /> 9 0 REPORT LIMITATIONS 20 <br />