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^ ^ 1 2 3 4 5 6 7 DOE1R1.-2001-29 Draft l) Rcdlinc/StrikeowE prcmise for the Inadvertent intmder scenario was to ensure that the dose from a single acute exposure would not exceed 500 nuem. The 221-U Facility 8 9 dose to an inadvertcnt inlruder in the presence of these types of contaminants is predicted to be above contains various levels of ndiologically contaminated equipment. fission products, contaminated building materials, and/or miscellaneous debris from the fuels 10 11 12 500 mrem for a single acute exposure for at least 500 years. manufacturing process. The potential radiological Table 1. Representative Risks of 221-U Facility Contaminants. Contaminant Represenfatlvt-95S LiCL of ' Human i:lealsh Risk b Nonndionuclides Contaminant Concenlrations (Industrial Scenarlo) Antimon 2.96+1-0.14 me/ke )J1=0.07+1-0.02 Arie ni 50.3a/-23.3mJke NI=2+/-1:1CR-7.6xI7`+/.9.Sx10't jl&pRID Cadmium 397 19 f1 ID:t.6g 3.54+/.0.13 M:U 111= 0.07 +/- 0.01 III=0.33+/.001:1CRs1.7x 104 4-3.5 x 10's W' i l ead Mercury Sclcniurn SiLE Uranium 2.100+/-349 ^/LS 1.140+/-12S 3tSLp mc/ka 1.190+/- 1173ri20 mclka 0.2''_S+/.0.o5.y mg/Rg 4 + mvJkg JjW_±L-J,4Q mgAcg HI=0A18+1-0.003 Not Applicable; PRO = 353 mg/kg HI =50±/-S ;2^ HI=O.oOrxt+/-o.0lx/i }u = 0.062 +/. 0.ais 1. 4+/- HO=87+1-12 TotallCRs2.Sx10++/-0.7x 04 Radionuclides Americium-241 Cesium-137 6.4 x 10's+1- 3.1 x IO^S.32C,+7 pCi/g ^ d^+ - 0.4 x pCVg ICR => 10'i+I•^ ICR => 10' +/- Cobalt^fi 9.4 x 10' +/. 1.4 x l0'^ 437,000 pCi/g ICR s> 10' = +/- 0'- Europium-154 3.3 x 10''+/- 0.9 x 10' a3,6C-r6 pCi/g ICR => 10' a +l- > 0'- Ncntunium-237 7.1 vi1 Q"+ l.4.6 x 10~ pCVg ICR => 10'=+/-> 10'- Plutonium-238 s a x I0'-+/- 0.9 x 10•'Z,qgg pCi/g It'R s 3.1- OeS x 10's3.3-a-iA'a Plutonium-239 J.4 x 10' +l-0.^3^3,;85+5 pCi/g ICR=> 1D+l-^jQ- Plutonium-240 3.3x 10"+/-0.6x_t0'!d,H3E+3 pCi/g ICR=>10+.> Strontium-90 Thorium-230 2.3 +^ x lb îA3T+9 pCi/g ].1x 10'+l- 0.2 x 10't pCi/g ICR=> 10' LCM = 4 +a> 0+- • Uranium-234 6. t x 10° 2^ +/- 2 x 10'I>i(rAOD pCJg ICR = - 6.I-a-iA's Uranium435 -':i,2G0 3 ^Vg ICR = 1.9 x 10' +/-1.1 x 10 s;a.{ a-i8^ Uranium-238 4.0 x 10` +/- 1.1 x 10' 8B ^'Jg ICR= ItY^+/-O.R 2.8 x 10^9.g w i9+ TotallCR=>10's+- lo't '957 UCL vnluesBwe for individual contaminants were used to iweaninrI final feasibility study. sks as described in Appendix P-A-of the RJumerical values are not reported for risks greater than lo't because the linear equation for risk estimation Is only valid for eontaminant Intakes resulting in calculated risks below 104. iU =hazanlindrx liQ - haiani maxiem . aum of haârd^ndices ICR ainctementalearberrisk PRtI a pteiinilnary remediation goal I1Ci.= upper confidence limit 13 Eeologleal Risk 14 The 221-U Facility is within the industrial exclusive 15 area Identified in the Ht:P E1S (DOFJEIS-0222-F). 16 The area Immediately surrounding the 221-U Facility 17 is highly disturbed and thus provides reduced-quality 18 19 20 21 22 23 7 habitat for ecological communities and the establishment of food webs with a hierarchy of tcrrestrial receptors. In addition, there is little likelihood of ecological exposure to 221-U Facility contaminants via intrusion or releases at the present time. However, if remedial alternatives are not
o"N DOF/RIr2001-29 Draft D Redline/Strikeout li I implemented, the possibility of exposure will increase 32 2 over time. 53 54 3 The level of safety required for the protection of all 55 4 human individuals is believed to be adequate to protect 56 5 other species, although not neces 6 members of those species. Etolo 200 Areas, including the 221-U Facil be--further considered in The t 35 36 37 Individual risk In the wabe5ev-F. feesilkw+4eel" I ° ie^-pwjxr Idam _ R t renxdiei•-eetien-aittrnatwe-ahusenîsr-Nw •22-{-U rweiliiv.- The placement of an environmental cap under containment alternatives would be designed to sever all exposure pathways, thus greatly reducing the probability and degree of impacts to human and ecological receptors. 38 REMEDIAL ACTION OBJECTIVFS ^41 42 43 44 45 46 47 48 49 50 51 The remedial action obJectives (RAOs) for the 221-U Facility are as follows: RAO 3: Prevent the migration of contaminants through the vadose zone to groundwater and the Columbia River such that concentrations reaching groundwater and the river do not exceed ARARs or risk-based criteria and will result in no ftuther degradation. 57 RAO 4: Minimiu physical, ecobgicat, or cultural 58 impacts caused by remediation of the 221-U Facility or 59 by use of ahe 221-U Facility as a disposal facility. 60 PRELIMINARY REMEDIATION GOALS 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 90 81 82 83 84 85 86 87 88 89 90 Preliminary rcrnediation goals (PRGs) have been developed for determining the extent of resnediation required under Altemative5 1 and 6 . Hecause there ere no low-level waste streams at this time with aeceotence criteria end risk assessment narsmeters. These data would be submitted to the reeufatnrv agencies and DOE for jechnico l review and cotKurrence. PROs for Alterna 'ttvei I nd 6 are eentaieed iarnesent in Tables 2 and 3. These values are based on acceptable levels of human health and ecological risk. Typically. PROs are Identified for individual hazardous substances. If multiple contaminants are pnesent at n site. the suitability of using Individual PRds as final cleanup values protective of human health and the environment is evaluated based on site-specific information and the potential for contaminant Interaction. Specific PROa applicable to achieving one or more of the 221-U Facilitya RAOs are based on the following guidance and ARARs. Final PROs will be specified in the interi*-autio*ROD for the 221-U Facility. RAO 1: Prevent or mitigate health and occupational 91 92 Fardirectexposurr. risks to workers and the environment from physical, chemical, and radiological haxards posed by the 93 • For radionuclides, the EPA CERCLA risk range of 221-U Facility. 94 104 to 10+ increased cancer risks RAO 2: Prevent or mitigate risk to human health. ecological recepton, or natural resources associated with external exposure to, ingestion of, inhalation of, and dermal contact with 221-UFacility contents at kvels that exceed applicable or relevant and appropriate requirements (ARARs) or risk-based criteria. •1M Td•Panin tuve ehaea 15 meMyr above backpwod far t.aDa qean afln naal temediadm fur a maxiwur tapwed i.dividul to addiev ads PRO. CoeVaance with this PRO 0.e.10 to 104) will be dennnstrated for tadioloairaf and nwtadiolopnl eoeurNmnn of eoocem apan site ved6ntian and darout.
Page 1 and 2: AR TARGET SHEET The following docum
Page 3 and 4: (^N r^ r Proposed Plan for the Cany
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Page 9: ^ (^N t^ the steHitFths+amedielaeti
Page 13 and 14: (^N i0,"% / ' DOF/RL-2001-29 Draft
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Page 17 and 18: I f^ ^ DOE!RL-2001-29 Ikaft D Redli
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Page 21 and 22: ! ' t^ Project Prepare the existing
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Page 25 and 26: ^ POINTS OF CONTA CP ^ U.S. Drnartm
Page 27 and 28: f^ n DOF/RL-2001-29 Draft D Redlinc
Page 29 and 30: noFIRL-2001-11 Rev. p 1 1)raft P ^
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Page 45 and 46: Appendix D- Slope Stability Analysi
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^ Appendix D-- Slope Stability Anal
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^ (00h^' ^ 2 DOFIRI^2001-I I Rev. J
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t^` ^ ^ 1 2 DOFJRL-2001-11 Rev. JDr
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Appendix E - Detailed Description o
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Appendix E- Detaiied Description of
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t^' Appendix E -Detailed Descriptio
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f,^N Appendix E - Detailed Descript
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i^ r^'. ^ 1 2 DOFJRL-2001-11 Rev. 8
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^ ^ t^ 2 DOEIRL-2001-11 Rev. H Ihaf
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Appendix F - Detailed Description o
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Appendix F -Detailed Description of
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Appendix T- Detailed Description of
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Appendix F -Detailed Description of
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(O^N Appendix F - Detailed Descript
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Appendix E- Detailed Description of
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..^•. , Appendix F- Detailed Desc
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(^, Appendix F - Detailed Descripti
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Appendix F-Detailerl Description of
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^`} Appendix F - Detailed Descripti
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^ (10^' (^N DOF/RL-2001-11 Rev. AjD
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^N r^ 1 n DOF/RLr2061-1 l ' Rev. I
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1 ^ (^N ^ DoFJRL-M-t t ^ Rev. I Dnf
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Appendix G -Detailed Description of
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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 of
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^ . , , ,... Appendix G - Detailed
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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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(00^1 2 3 4 5 6 7 8 9 10 11 12 13 1
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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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^ DOFlRI.•2001-11 Appendix I -Dec
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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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