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CONTENTS <br /> INTRODUCTION ........................................................................................................................1 <br /> General...........................................................................................................................1 <br /> InvolvedParties...............................................................................................................1 <br /> ' CLOSURE CAP EXTENSION.....................................................................................................2 <br /> ' Pre-Approval of Materials................................................................................................2 <br /> FinalApproval of Materials..............................................................................................2 <br /> ' Construction....................................................................................................................2 <br /> ' PERIMETER LANDFILL GAS MIGRATION MONITORING WELLS.........................................12 <br /> PHOTOS <br /> Photo 1 —Pre-construction Conditions <br /> Photo 2—Excavation for Subgrade w/Unsuitable Material <br /> Photo 3 —Drilling LFG Wells <br /> Photo 4—Several Landfill Gas Wells Awaiting Connection <br /> Photo 5 —Placement of Suitable Material for Subgrade <br /> Photo 6—LLDPE Installation <br /> ' Photo 7—LLDPE Geomembrane <br /> Photo 8 - Seaming LLDPE <br /> Photo 9—Pressure Test of LLDPE Seam <br /> Photo 10—Typical Destructive Seam Test <br /> Photo 11 —LFG Well Penetration and Seal Through Geomembrane <br /> ' Photo 12—Placing Geocomposite <br /> Photo 13 —Anchor Trench <br /> Brief Technical Certification Report Department of Public Works/Solid Waste <br /> Corral Hollow Closure Cap Extension I County of San Joaquin—September 6,2013 <br />