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:,. Appendix F -Detailed Description of Alternative 3: DoFnu^2001-I I I Entombment with Internal Waste Disposal Rev. A raft 1 ; Rcdlinc/Strikcout 1 supplement site surveillance efforts. The DOE, or subsequent land managets, could enforce 2 land-use restrictions as long as risks were above unrestricted land-use levels. The DOE would 3 continue to use fencing, eacavation permits, and the badging program to control access to the 4 area for as long as it maintains control over the land. Signs would be maintained prohibiting 5 public access. 6 7 Legal restrictions would include both administrative and real-property actions intended to reduce 8 or prevent future human exposure to contaminants remaining on site by restricting the use of the 9 land, including groundwater use for drinking water or irrigation. Land-use restrictions and 10 controls on real-property development are effective in providing a degree of human health 11 protection by minimizing the potential for contact with contaminated media. Land-use 12 restrictions will be put in place, as necessary, until such time as the federal government ceases 13 ownership of the property. The DOE, or subsequent land managers, would enforce land-use 14 restrictions as long as risks were above acceptable levels. 15 16 After cleanup, site land-use controls would be established through easements and covenants to 17 prevent development. The DOE, or subsequent land managers, would enforce land-use 18 restrictions as long as risks were above acceptable levels. 19 20 Groundwater-use restrictions would be required so that groundwater is not used as a drinking water source as long as contaminant concentrations are above federal and state drinking water • 22 ( standards and WAC 173-340 IAFV^B groundwater protection standards. Irrigation would also 23 need to be restricted on the footprint of the environmental cap. Well drilling, except for the 24 purposes of monitoring, research, or other uses authorized by the Tri-Parties, would be 25 prohibited until groundwatercleanup kvels comply with these drinking water standards. 26 27 F.3A.2 Maintain Monitoring System. A moisture measuring system or a detection method to 28 monitor for contamination movement may be reauired to determine if the barrier is nerformine 29 aa desiened The final desien of the environmental can will provide the specific details on 30 engineered features to accomplish any perfomtance monitoring, 31 32 ' tI+ 33 34 d (e.g ., 35 36 37 Long-term site-specific monitoring requirements for Alternative 3 would not be determined until 38 post-ROD activities (e.g., during final design in preparation of the remedial design 39 report/remedial action work plan). It is expected that long-term monitoring would occur over the 40 1,000-year performance period and consist of either groundwater monitoring or vadose zone 41 monitoring, but it is not expected that both monitoring efforts would be required at the 42 221-U Facility. The specific monitoring system design and its requirements would be /~t3 established as part of the operations and maintenance plan for the 200 Area-widc groundwater 44 operable unit remcdiation activities associated with the 200-UP-I Operable Unit. 45 Final Fnatibility Stardy farrhe Canya+ Disposition 6Jrialive (22I-U FaciJity/ J un e '100 F-23
(^, Appendix F - Detailed Description of Alternative 3: DO>JRL-2001-11 I Entombment with Internal Waste Disposal Rev. el oraf Rcdiine/Strikcout 1 Post-closure care would comply with the following functions as defined in Washington 2 Administrative Code 173-303-665(6). The functions were selected as being representative of the 3 4 post-closure requirements of other applicable regulations: 5 6 • Limit access to the environmental cap 7 • Maintain the integrity and effectiveness of the final cover (engineered barrier), including 8 making repairs to the barrier, as necessary, to correct the effects of settling, subsidence, 9 10 erosion, or other events 11 • Maintain and monitor the groundwater monitoring systems 12 13 • Prevent runon and runoff from eroding or otherwise damaging the final cover (engineered 14 15 barrier) 16 • Protect and maintain surveyed benchmarks. 17 18 19 Post-closure care would consist mainly of periodic inspections to identify erosion or settling. Either of these items could lead to infiltration of the barrier. If settling is Identified, the resultant ^.20 depressions would be filled and reseeded. The post-closure cost estimate includes a one-time / 21 replacement of the engineered barrier after 500 years. 22 23 Monitoring of the barrier and the vadose zone or groundwater would be perfotmed over the 24 25 26 27 28 1,000-year petformance period to verify the effectiveness of the waste placement activities and containment provided by the engineered barrier. Periodic sampling of monitoring stations would be performed followed by comprehensive laboratory analyses. 29 FA REFERENCES 30 31 10 CFR 835, "Occupational Radiation Protection," Code of Federal Regulations, as amended. 32 33 34 64 FR 61615. 1999, "Hanford Comprehensive Land-Use Plan Environmental Impact Statement (HCP EIS), Hanford Site, Richland, Washington; Record of Decision (ROD)," Federal 35 Register, Vol. 64, No. 218, pg. 61615 (November 12). 36 37 BHI.1998, Environmental Restoration Disposal Facility Waste Acceptance Criteria, 38 39 BI-11-00139, Rev. 3, Bechtel Hanford, Inc., Richland, Washington. 40 BHI, 2001a, Canyon Disposition Initiative: Preliminary AL11RA Bvaluation for Final Feasibility 41 42 Study Alternatives 1. 3, 4, and 6 (CCN 089828 to G. M. MacFarlan, Bechtel Hanford, Inc., from J. C. Wiles and R. C. Free, Jr„ May 31), Bechtel Hanford, Inc., Richland, ('33 Washington. Final Feasibility Sardyjor the Canyon Dirposhion lnitiative (221 •U Faciliry) hinc 1003 F-24
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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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i^ f 1 2 3 S 6 7 8 9 11 12 13 14 15
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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 D - Slope Stability Analys
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(^N Appendix D- Slope Stability Ana
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• Appendix D-Slope Stability Anal
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^• r^, r^ 2 3 4 5 6 7 Appendix D-
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^ Appendix D-- Slope Stability Anal
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Page 67 and 68: Appendix E - Detailed Description o
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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 Descrip
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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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^ DOFlRI.•2001-11 Appendix I -Dec
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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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