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LFR Inc. <br /> CONTENTS <br /> CERTIFICATION <br /> 1.0 INTRODUCTION <br /> 1.1 Previous and Ongoing IRAs <br /> 1.2 Proposed Phase V IRA Objectives 2 <br /> 2.0 BACKGROUND <br /> 2.1 Historical Site Use 4 <br /> 2.2 Previous Investigations 5 <br /> 2.2.1 Groundwater investigations in the Vicinity of the Bank of Stockton .............6 <br /> 2.2.2 Previous Feasibility Studies for Groundwater Remediation using ERD..........7 <br /> 3.0 ACTIVITIES CONDUCTED IN SUPPORT OF PHASE V IRA 7 <br /> 3.1 Bank of Stockton MIP Investigation ..........................................................8 <br /> 3.2 Evaluation of Geochernical Parameters 9 <br /> 3.2.1 Geochernical Sampling Results........................................................ 10 <br /> 3.2.2 Laboratory-Analyzed Geochernical Results......................................... 10 <br /> 3.2.3 Field-Measured Geochemical Results................................................ 12 <br /> 3.2.4 Summary of Geochernical Results.................................................... 13 <br /> 3.3 Evaluation of cis-1,2-DCE Stall ............................................................. 13 <br /> 3.4 ERD Substrate Selection ...................................................................... 14 <br /> 3.4.1 Substrate Suitability..................................................................... 14 <br /> 3.4.2 Substrate Cost Considerations......................................................... 15 <br /> 3.4.3 Substrate Delivery Considerations.................................................... 17 <br /> 3.4.4 Recommended Substrate ............................................................... 17 <br /> 4.0 PROPOSED PHASE V IRA DETAILED PLAN................................................ 18 <br /> 4.1 Recommended ERD, Well Spacing and Layout............................................ 18 <br /> 4.2 ERD, Substrate Selection...................................................................... 19 <br /> 4.2.1 Substrate Requirement.................................................................. 20 <br /> 4.2.2 ERD Well Installation ..................................................................22 <br /> .p-PhV 1P.A-SepG7+ma1-06750.dm:1fr <br /> Page I <br />