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Appendix H - Detailed Description of Altcrnative 6: DoEIRL-2001-11<br />

Close in Place - Collapsed Structure Rev. A 1 Draft n<br />

n I Redline/Strikeout<br />

ATfACHAtENT H1- FUNCTIONAL HIERARCHY<br />

1 H.1.3.1.5 Angle drill approx 15 meters OC through 221-U exterior wall<br />

2 and grout vent tunnel with flowable grout.<br />

3 H.13.2 Disposal of Contaminated Equipment in 221-U<br />

4 H.1.3.2.1 Size and dismantle equipment from canyon floor<br />

5 H.1.3.2.2 Place canyon eqmt into cell<br />

6 H.1.3.2.3 Fog celVaqmt with fixative paint<br />

7 H.1.3.2.4 Grout cells and replace cover blocks<br />

8 H.1.3.2.5 Pressure grout cells once cover blocks in place<br />

9 H.1.3.2.6 Remove equipment from Operating Gallery. Centainerize it<br />

10<br />

i l H.1.3.2.7 Remove the bails from the cell cover blocks<br />

12 •H.1.3.3 D&D Railroad Tunnel<br />

13 H.1.3.3.1 Remove soil cover from rail tunnel<br />

14 H.1.3.3.2 Fix contamination on tunnel interior<br />

15 H.1.3.33 Demolish railroad tunnel and clear demolition debris to allow<br />

16 truck access into the rail tunnel.<br />

17 H.1.3.3.4 Place containerized and et#wFlone-len¢th lecacv wastes into<br />

18 gGcl13 (rail tunnel)<br />

19 H.1.3.35 Construct concrete wall to close rail tunnel opening in canyon<br />

20 H.1.3.3.6 Grout Ccll 3 solid with covers in place<br />

21 H.1.3.3.7 Place demolition debris into tunnel section ( inner half)<br />

22 H.1.3.3.8 Fill voids where found in demolition debris w/ flowable grout<br />

23 H.13.4 Hot Pipe Trench<br />

24 ^ 1-1.1.3.4.1 Remove 6evepo_vSLblocks<br />

25 • 111.3.4.2 Fog trench/piping with fixative paint<br />

26 H.1.3.43 Grout pipe trench full with pipes in place and replace cover<br />

27 blocks<br />

28 H.1.3.4.4 Pressure grout trench once cover blocks in place<br />

29 H.1.3.4.5 Remove the bails from the hot pipe trench cover blocks<br />

30 H.1.3.5 Remove Surface Contamination<br />

31 H.1.3.5.1 Assume for Alternative 6 no surface contamination removal is<br />

32 needed.<br />

33 H.1.3.6 Fix contamination on 221-U interior surfaces<br />

34 H.1.3.6.1 Building interior (canyon walls, floor & roof)<br />

35 H.lA Modify external area _<br />

36 H.1.4.1 Disposition external aboveground legacy structures and systems within<br />

37 the environmental cap footprint<br />

38 H.1.4.1.1 Disposition 276-U Solvent Recovery Facility<br />

39 H.1.4.12 Disposition 271-U office building<br />

40 H.1.4.1.3 Disposition Front and Rear Stairs for 221-U<br />

Final Feasibifiry Study jor the Canyon Disposition Initiative (221 -U Facility)<br />

JIM 100 , H-28

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