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� a <br /> r <br /> 1 <br /> TABLE OF CONTENTS <br />' CONTENTS PAGE <br /> 1.0 INTRODUCTION <br />' 2.0 SITE DESCRIPTION AND BACKGROUND................... .......................... 1 <br /> 21 Underground Storage Tanks <br />' 22 Regional Geology and Hydrogeology 2 <br /> 23 Site Geology and Hydrogeology 2 <br />' 3.0 PREVIOUS ENVIRONMENTAL WORK...............................................................3 <br /> 4.0 SUMMARY OF SOIL AND GROUNDWATER CONDITIONS............................5 <br /> 41 Extent of Hydrocarbon-Impacted Soil 5 <br /> 42 Extent of Hydrocarbon-Impacted Groundwater 5 <br /> 5.0 DESIGN PLANS AND SPECIFICATIONS................................................................6 <br /> 51 Design Parameters 6 <br /> 5 1 1 Vapor Extraction-Wellhead Vacuum, Flow Rate, and Radius of Influence 6 <br /> 5 1 2 Air Sparging—Pressure and Flow Rate 6 <br /> 5 13 Soil Volume and Pore Volume Calculations 6 <br /> ' 5 1 4 Pre-Remediation Mass Balance Calculations- Soil 7 <br /> 5 15 Pre-Remediation Mass Balance Calculations-Groundwater 7 <br /> 5 16 Estimated Length of Operation and Final Constituent Concentrations 7 <br /> 52 Design Specifications 7 <br /> 5 2 1 Vapor Extraction System 7 <br /> 5 2 2 Groundwater Air Sparging 8 <br /> 523 Remediation System Layout 9 <br /> 6.0 Remediation System Construction.............................................................................9 <br /> 61 Building, Air Pollution Control District, and Well Installation Permits 9 <br /> 62 Construction and Construction Inspection 10 <br /> ' <br /> 63 Systems Startup and Operation 10 <br /> 6 3 1 Vapor Extraction and Air Sparge Systems Monitoring 10 <br /> 6 3 2 Systems Sampling 11 <br /> 64 Systems Performance Evaluation 12 <br /> 7.0 LIMITATIONS.......................................................................................................... 12 <br /> 8.0 REFERENCES........................................................................................................... 13 <br />