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TABLE OF CONTENTS <br /> Page <br /> 1.0 INTRODUCTION ............................................................................................................ 1 <br /> 2.0 TECHNOLOGY DESCRIPTION ..................................................................................... 1 <br /> 2.1 DELIVERY OF OXYGEN TO THE SUBSURFACE .........................................................2 <br /> 2.2 TREATMENT PROCESSES ......................................................................................3 <br /> 2.3 DESIGN CONSIDERATIONS.....................................................................................4 <br /> 2.3.1 Zone of Influence.....................................................................................4 <br /> 2.3.2 Injection Pressure and Air/Oxygen Flow Rate.........................................5 <br /> 3.0 TECHNOLOGY EVALUATION.......................................................................................5 <br /> 3.1 TREATMENT AREA ................................................................................................5 <br /> 3.2 EFFECTIVENESS ...................................................................................................6 <br /> 3.3 IMPLEMENTABILITY................................................................................................6 <br /> 3.4 COST ...................................................................................................................7 <br /> 3.5 ENERGY REQUIREMENTS ......................................................................................9 <br /> 4.0 CONCLUSIONS............................................................................................................ 10 <br /> 5.0 REFERENCES ............................................................................................................. 11 <br /> TABLES <br /> Table B.1-1 Feasibility Study Cost Estimate — In Situ Air Sparging Biobarrier <br /> Table B.1-2 Backup for Unit Construction Costs— In Situ Air Sparging Biobarrier <br /> Table B.1-3 Backup for Monitoring Costs— In Situ Air Sparging Biobarrier <br /> FIGURES <br /> Figure B.1-1 Plan View of In Situ Air Sparging Biobarrier Alignment <br /> AMEC Geomatrix, Inc. <br /> \\oad-fs1\doc_safe\9000s\9837.006\4000 REGULATORYTS Assessment_Apx B_012711\Attachment B.1\Attach B1.doc 131-i <br />