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Appendix F - Detailed Description of Alternative 3: DoFntl.-2001-11 Entombment with Internal Waste Disposal Rev. A 1 Drr11 ti n I Rcdlinc/Strikcout 1 include a combination of temporary shclters and/or sealing products. Shelters would be used to 2 shield waste from precipitation. A fixative sealer would be applied to surfaces with smearable or 3 loose contamination. Sealers are used to prevent dangerous/radioactive contaminants from 4 seepingAeaching out of the waste containment. 5 6 Personnel and equipment leaving the site present a risk of contaminant migration. This risk 7 would be mitigated by procedural and physical measures. Work procedures would require 8 equipment used on the site and exposed to dangerous/radioactive wastes to be decontaminated 9 before the equipment is released. Personnel working at the site would wear proper protective 10 clothing. Protective clothing exposed to dangerous/radioactive wastes would be controlled in 11 accordance with Hanford Site procedures. Personnel leaving radiologically contaminated areas 12 would require an exit survey before leaving. 13 14 Hazardous materials are expected to present minimal hazard to personnel or the environment. 15 All waete tnatetielswa. would be sampled, tested, and designated as required by applicable or 16 relevant and appropriate requirements (ARARs) and applicable waste acceptance criteria. 17 18 F.1.2 Establish Infrastructure 19 20 Implementation of Alternative 3 remediation activities would rely heavily upon the existing ('21 221-U Facility complex infrastructure. Some modification of the existing building and utilities 22 would be necessary to support this alternative. These and other mobilization such as preparation 23 of staging areas would be necessary to prepare the complex to support Alternative 3 activities. 24 25 F.1.2.1 Modify Existing Infrastructure. The existing utilities where possible would be used to 26 support Alternative 3 activities. The basic approach to establishing the infrastructure for this 27 altemative would be to use the existing road network within the complex and relocate water and 28 electrical service terminals outside the footprint of the Alternative 3 environmental cap. The 29 environmental cap for this alternative is larger than that of Alternative 6. 30 31 The existing road network surrounding the 221-U Facility would adequately accommodate 32 equipment during waste delivery operations, waste-hauling traffc, and traffic associated with 33 construction of the environmental cap. Additional spurs off paved roadways for heavy 34 equipment access and waste movement activities would be constructed, as required. 35 36 Immediately before demolition of 271-U, water mains and sewer pipelines located within the 37 environmental cap footprint would be sealed at the outer edge of the environmental cap. 38 Temporary water lines would be installed, as required, for sanitary requirements, fire- 39 suppression systems, decontamination operations, and dust control. Main transformers for 40 electric power to the 221-U Facility would be relocated outside of the perimeter of the 41 environmental cap. Temporary 480-volt electrical lines and panels would be installed in the 42 building, as required, for lighting, ventilation, and equipment operations. The electrical service 1,00N43 would need to include power supply to a new air-handling unit on the roof of 221-U. 44 Final Feasibility Study jor she Canyon Dirpo.rition Initiative (221•U Facility) J une"' 001 F-7
Appendix F - Detailed Description of Alternative 3: DoEIRtr2oot-1 I Entombment with Internal Waste Disposal Rev. e raft RedlinclStrikeout 1 The existing bridge crane would be recertified for use during equipment handling within the 2 canyon. At the same time, minor modifications and repairs would be made to the crane, 3 including repair of the heating and air conditioning systems. 4 5 The final step modifying the 221-U Facility for this alternative is replacement of its roof 6 covering (versus the roof structure). To prevent precipitation from entering the building during 7 waste handling activities within the canyon, a new roof covering would be installed. 8 9 F.1.2.2 Establish Support Facilities. Alternative 3 would also require administrative offices, 10 change rooms, tool rooms, lunchroom, restrooms, and storage rooms. During the initial activities 11 such as equipment sizing, equipment placement in the process cells, and demolition of attached 12 structures, this support could be provided from the 271-U Building. The use would be practical 13 only during the initial stages of 221-U modifications.. Although there would be no need for close 14 crane access to 221-U, 271-U Building demolition would still occurearly in this alternative. 15 Removal of this building would allow preparation of the electrical gallery for waste placement 16 and access for backlilling. The backfill would start on the northwest side of the 221-U Facility 17 as the galleries are filled with waste. 18 19 Mobile office units would be brought to the site to provide support office space at that point. 0 These facilities would be located outside the construction area for the environmental cap. ^1 A construction perimeter fence would be installed to control access into and out of the work 22 zone. A main change room for nonradioactive work would be located outside the exclusion 23 fence. Existing telephone and electrical lines would be used to support office and clerical 24 requirements. Existing Hanford Site fire protection and ambulance services would be adequate 25 for emergency response. 26 27 F.1.2.3 Establish Staging Areas. Personnel staging areas would be included in the space 28 requirement for the support facilities. This would include change rooms, meeting facilities, and 29 other construction activity support areas. Equipment storage, waste qucucs, decontamination 30 areas, survey tents, container storage, and other staging requirements would be included in the 31 layout of support requirements for Alternative 3. 32 33 F.1.3 Modify Facility 34 35 In preparation for the operational phase of this alternative, the 221-U Facility would require 36 modifications. The first step would be to prepare the facility by evaluating it for the intended use 37 and making modifications as necessary. A major part of this step would be preparing a new 38 building ventilation system and blocking the existing system. The existing equipment on the 39 ^ an would be placed into the process cells, and both the cells and 40 pipe trench would be grouted. The railroad tunnel would be demolished to improve access to the 41 221-U Facility. The final modification step would be to address surface contamination with a 42 fixative application to prepare the canyon for the start of waste emplacement activities. ('O'*;t3 Finat Feastbiliry Srady jor the Canyon Disposition lnUiative (221-U Facifiry) unc 1 00 1 F-8
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AR TARGET SHEET The following docum
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(^N r^ r Proposed Plan for the Cany
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(^N (0-^, (^N 1 2 3 r• • .`•
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^ (^N t^ the steHitFths+amedielaeti
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o"N DOF/RIr2001-29 Draft D Redline/
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(^N i0,"% / ' DOF/RL-2001-29 Draft
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I f^ ^ DOE!RL-2001-29 Ikaft D Redli
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! ' t^ Project Prepare the existing
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f ' ^ rN 100 I Noise, Visual, and A
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^ POINTS OF CONTA CP ^ U.S. Drnartm
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f^ n DOF/RL-2001-29 Draft D Redlinc
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noFIRL-2001-11 Rev. p 1 1)raft P ^
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^ ^ 1 2 DOFJRL-2001-11 Rev.A 1 Dra(
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. . .,.. Appendix C - Risk Modeling
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t^ Appendix C - Risk Modeling of an
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(_^% ^ ^ 11 Appendix C - Risk Model
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(0"% t^ DOFJRL-2001-1 l Rev. N 1 Dr
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1 ' ^ ^ DOEJRL-2001-1 t Rev.H1 nraf
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Appendix D- Slope Stability Analysi
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Appendix G - Detailed Description o
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Appendix G -Detailed Description of
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^ . , , ,... Appendix G - Detailed
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Appendix G - Detailed Description o
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Appendix G- Detailed Description of
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^• ^ Appendix G - Detailed Descri
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^ ^ t"'^N 1 2 DOElRL-2001-I1 Rev. 9
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t^N (M"N Final Feasibifity Stady ja
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,.r.. . Appendix H - Detailed Descr
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(^\ Appendix H - Detailed Descripti
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Appendix H - Detailed Description o
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Appendix N- Detailed Description of
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Appendix It - Detailed Description
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(^N 5 6 7 8 9 to 11 12 13 14 15 16
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^N i ' (0-1% C Appendix H- Detailed
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Appendix H-Detailed Description of
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f^ ^ DOFJRL-2001-I I Rev. N raft Rc
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f^ ^ 1 2 DOFlRI.-2001-11 Rev. pI af
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I ,.,. , ... . DOFJRI.-2001-11 Appe
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^ DOF/RL-2001-11 I Appendix I - Dec
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DOFJRI.-2001-11 I Appendix I- Decom
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^'. DoEIR1.-2001-11 Appendix I-Deco
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^ ("` ^ DOFJRI.2001-11 Rev. G I. Dr
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^ r^, TABLES DOFJRIr2001-11 • Rev
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^ Appendix J- Applicable or Relevan
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t^ ^ Appendix J-Applicable or Relev
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^ Appendia J- Applicable or Relevan
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