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DOFIRL-2001-11<br />
Rev.61 Dr,U<br />
Re IinclStril.cout<br />
1 TABLE OF CONTENTS<br />
2<br />
3<br />
4 H DETAILED DESCRfPTION OF ALTERNATIVE 6: CLOSE IN PLACE-<br />
5 COLLAPSED STRUCTURE ....................................................................................... H-1<br />
i1.1<br />
H.2<br />
H.3<br />
H.4<br />
FIGURES<br />
H-1. Alternative 6: Cross Section of Environmental Cap ............................................. ...... H-25<br />
H-2. Alternative 6: Plan <strong>View</strong> of Environmental Cap ..........................................................H-26<br />
ATTACHMENT<br />
PREPARE EXISTING COMPLEX ....................................................................H-4<br />
H.1.1 Control Hazards....... ...............................................................................H-4<br />
H.1.2 Establish Infnastructtue ...................................................................._......H-7<br />
H.1.3 Modify Facility........._ ....................................................................._......H-8<br />
H.1.4 Modify External Area .......................................... .................................. H-13<br />
H.1.5 Manage Hazardous Materials ................................................................H-15<br />
OPERATE THE COMPLEX ............................................................................H-15<br />
H.2.1 Emplace Waste in 221-U Galleries .......................................................H-15<br />
H.2.2 Demolition of 221-U Building ......... _ ..................................................H-17<br />
CLOSE THE COMPLEX . .................... ....... .................................................... H-18<br />
H.3.1 Consttuct Environmental Cap ............................................... ................ H-19<br />
H.3.2 Revegetate <strong>Site</strong> ................. _................................................... ................ H-20<br />
H.33 Cleanup Complex ............. _............................... ................... _.............. H-20<br />
H.3.4 Sustain Post-Closure ........ ................................. _............................ .....H-21<br />
RF.FERENCES ............................................................... .................................. H-23<br />
HI FUNCTIONAL HIERARCHY ..................................................................................... H-27<br />
Finaf Feasibi[iry Study for the Canyon Disposition Atitiative (221-U Facility)<br />
u • 2tbl<br />
H-iii