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TABLE OF CONTENTS BACKGROUND:......................................................................................................................................1 TANK/PIPING INFORMATION:.........................................................................................................1 EXCAVATION INFORMATION: .........................................................................................................2 ENVIRONMENTAL SAMPLE INFORMATION:...............................................................................3 SOIL....................................................................................................................................................3 WATER...............................................................................................................................................3 SUMMARY OF ENVIRONMENTAL SAMPLES COLLECTED:......................................................4 SUMMARY OF LABORATORY ANALYTICAL RESULTS:.............................................................4 PERSONAL PROTECTION EQUIPMENT(PPE)DISPOSAL: .........................................................7 CLOSURE REPORT CONCLUSIONS: .................................................................................................8 OTHEROBSERVATIONS: .....................................................................................................................8 APPENDIX A: COPY OF THE 879-G1U1&879-G2U1 APPROVED CLOSURE PLAN APPLICATION FOR UNDERGROUND TANK CLOSURE PERMIT................A-1 APPENDIX B: STRAIGHT BILLS OF LADING FOR USTs 879-G1U1 &879-G2U1 TANK CONTENTS..................................................................................................................B-1 APPENDIX C: LLNL HAZARDOUS WASTE DISPOSAL REQUISITIONS AND UNIFORM HAZARDOUS WASTE MANIFESTS FOR THE TANKS AND ASSOCIATEDPIPING...............................................................................................0-1 APPENDIX D: COPIES OF THE UNDERGROUND STORAGE TANK UNAUTHORIZED RELEASE(LEAK)/CONTAMINATION SITE REPORT FOR THE WATER RELEASE IN CLOSURE EXCAVATION OF TANKS 879-GlU1 &879-G2U1; and LLNL DISPOSAL OF NON-HAZARDOUS LIQUID LETTER with GIBSON LIQUID WASTE PROFILE SHEET..........................................................D-1 APPENDIX E: FIGURES&PHOTOGRAPHS OF CLOSURE ACTIVITIES FOR USTs 879-GlU1 and 879-G2U1........................................................................................... E-1 FIGURE 1: Sample locations for the closure of USTs 879-GlU1&879-G2U1 .........................................E-2 FIGURE 2: Sample locations from the soil piles for the closure of USTs 879-GlU1&879-G2U1.........E-3 PHOTOGRAPH 1: View of the relationshi of UST 879-G2U1 (fiberglass tank on left)and UST 879-G1U1(steel tank on rigght within the tank pit......:........................................................E-4 PHOTOGRAPH 2: View of UST 879-GlUl being mounted onto Erickson truck. Hold down strapsare beingg pplaced..............................................................................................................E-5 PHOTOGRAPH 3: View of UST 879-G2Ul being mounted onto Erickson truck. Hold down strapsare being placed..............................................................................................................E-6 PHOTOGRAPH 4: View of excavation after USTs 879-GlUl and-G2Ul have been removed............E-7 PHOTOGRAPH 5: View of soil sample being collected from backhoe bucket containing soil fromthe excavation pit..............................................................................................................E-8 PHOTOGRAPH 6: View of excavation depth being measured. Excavation soil sample was collectedfrom this depth.....:.....................................................................................................E-9 PHOTOGRAPH 7: View of additional soil being removed from the excavation...................................E-10 PHOTOGRAPH 8: View of additional soil being loaded into dump truck for temporary disposal into on-site soil stockpiles.........................................................................................E-11 PHOTOGRAPH 9: View of stockpiled soil covered with visqueen.:........................................................E-12 PHOTOGRAPH 10: View of asphalt stockpile from which composite samples were collected forradioactive analyses.............................................................................................................E-13 APPENDIX F: ANALYTICAL DATA&CHAIN OF CUSTODY RECORDS...............................F-1 APPENDIX G: CONSOLIDATED ENGINEERING LABS FIELD DENSITY REPORT...............G-1 APPENDIX H: CERTIFICATE OF TANK DESTRUCTION,ERICKSON,INC............................H-1