Groundwater Contamination and Treatment at Department of Energy Sites

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					              Groundwater Contamination
              and Treatment at
              Department of Energy Sites

August 2009          Compiled by the Office of Engineering & Technology
Contents

Acronyms ..............................................................................................................................................................4
Introduction ...........................................................................................................................................................5
Plume Map Function .............................................................................................................................................6
Plume Assessment Function.................................................................................................................................7
       Hanford Site: Plume Map ..............................................................................................................................9
       Hanford Site: Plume Assessments..............................................................................................................10
       Idaho National Laboratory: Plume Map.......................................................................................................12
       Idaho National Laboratory: Plume Assessments.........................................................................................13
       Lawrence Livermore National Laboratory Site 200 (Main Site): Plume Map ...............................................14
       Lawrence Livermore National Laboratory Site 200 (Main Site): Plume Assessments.................................15
       Lawrence Livermore National Laboratory Site 300: Plume Map .................................................................16
       Lawrence Livermore National Laboratory Site 300: Plume Assessments ...................................................17
       Los Alamos National Laboratory: Plume Map .............................................................................................19
       Los Alamos National Laboratory: Plume Assessments...............................................................................20
       Moab UMTRA Project: Plume Map .............................................................................................................21
       Moab UMTRA Project: Plume Assessments ...............................................................................................22
       Nevada Test Site: Plume Map.....................................................................................................................23
       Nevada Test Site: Plume Assessments ......................................................................................................24
       Oak Ridge Reservation: Plume Map ...........................................................................................................25
       Oak Ridge Reservation: Plume Assessments.............................................................................................26
       Paducah Gaseous Diffusion Plant: Plume Map...........................................................................................27

                                                                                                                                                                       2
Paducah Gaseous Diffusion Plant: Plume Assessments ............................................................................28
Pantex Plant: Plume Map............................................................................................................................29
Pantex Plant: Plume Assessments .............................................................................................................30
Portsmouth Gaseous Diffusion Plant: Plume Map ......................................................................................31
Portsmouth Gaseous Diffusion Plant: Plume Assessments ........................................................................32
Savannah River Site: Plume Map ...............................................................................................................33
Savannah River Site: Plume Assessments .................................................................................................34
West Valley Demonstration Project: Plume Map.........................................................................................36
West Valley Demonstration Project: Plume Assessments ..........................................................................37




                                                                                                                                                   3
            Acronyms

ACL         Alternate Concentration Limit                                           OU      Operable Unit
ARRA        American Recovery and Reinvestment Act                                  P&T     Pump and Treat
Be          Beryllium                                                               PBS     Project Baseline Summary
CAU         Corrective Action Unit                                                  PCE     Perchloroethylene
Car. Tet.   Carbon Tetrachloride                                                    pCi/L   Picocurie per Liter
Cd          Cadmium                                                                 R&D     Research and Development
CERCLA      Comprehensive Environmental Response, Compensation, and Liability Act   RCRA    Resource Conservation and Recovery Act
CFA         Central Facilities Areas                                                RDX     Cyclotrimethylenetrinitramine
Cr          Chromium                                                                ROD     Record of Decision
Cs          Cesium                                                                  RTC     Reactor Technology Complex
DCE         Dichloroethylene                                                        RWMC    Radioactive Waste Management Complex
DCGLs       Derived Concentration Guideline Levels                                  Sr      Strontium
DNAPL       Dense Non-Aqueous Phase Liquids                                         SVE     Soil Vapor Extraction
DOE         Department of Energy                                                    TAN     Test Area North
ERH         Electrical Resistance Heating                                           TBD     To Be Determined
ETTP        East Tennessee Technology Park                                          TBOS    Tetra-butyl-orthosilicate
ESD         Explanation of Significant Difference                                   TCA     Trichloroethane
FY          Fiscal Year                                                             TCE     Trichloroethylene
GW          Groundwater                                                             Tc      Technetium
ISG         In Situ Grouting                                                        TKEBS   Tetra-kis-2-ethylbutylorthosilicate
HE          High Explosives                                                         TI      Technical Impracticability
Hg          Mercury                                                                 UEFPC   Upper East Fork Poplar Creek
I           Iodine                                                                  U       Uranium
INTEC       Idaho Nuclear Technology and Engineering Center                         UMTRA   Uranium Mill Tailings Remedial Action
MCL         Maximum Concentration Levels                                            VC      Vinyl Chloride
MNA         Monitored Natural Attenuation                                           VOC     Volatile Organic Compounds
NA          Not Applicable                                                          WAG     Waste Area Group
NPL         National Priority List                                                  WMA     Waste Management Area




                                                                                                                                     4
Introduction

The Department of Energy (DOE) has one of the largest groundwater contamination problems
and subsequent cleanup responsibilities in the world, in terms of the sheer volume of affected
groundwater, number of plumes, range of hydrogeologic settings, and diversity of contaminant
types. Plume maps and assessments have been prepared for DOE sites to summarize the
nature and extent of groundwater contamination and to identify approaches being taken to
remediate the contaminated groundwater.

This document provides DOE Program/Project Managers, senior management, and other
interested parties with a snapshot in time of the status of major groundwater contamination and
remedial approaches across the DOE Complex.

It also provides the Program/Project Managers with a “quick look” tool that sufficiently describes
the plumes and helps in the decision making for setting priorities and allocating resources for
remediation.

The document catalogs assessments of 94 currently identified plumes at thirteen DOE sites.
This edition adds an additional twenty plumes and five sites over the August 2008 edition and it
also identifies remedial activities that will benefit from American Recovery and Reinvestment
Act (ARRA) funding.

DOE sites chosen for inclusion in the initial August 2007 edition were generally the larger DOE
sites with groundwater contamination. In subsequent editions, additional DOE sites have been
added in order to present a more inclusive “snapshot” of the complete DOE complex.

The plume maps and assessments sheets for this document are updated annually.



                                                                                                  5
Plume Map Function

The plume maps provide a high level visual representation of groundwater information at each
site. The components and use of the plume maps are listed below:

        Illustrates location and extent of groundwater contamination

        Lists major groundwater contaminants

        Summarizes major remedial activities

        Identifies remedial research projects

        Identifies ARRA funded activities




                                                                                               6
Plume Assessment Function

The plume assessment function provides a “Consumer Report” style depiction of groundwater
contamination and treatment on all the plumes identified at a particular site. The components
and use of the assessments are listed below:

        Contains information on contaminated groundwater plumes, categorized by:

        o   Site

        o   Contractor

        o   Plume/Area

        o   PBS #

        o   Major Contaminants (that required, currently require, or may require remediation)

        o   Current Plume Size (greater than 320 acres, 40 to 320 acres, or less than 40
            acres)

        o   Source (active, controlled, or not present)

        o   Plume Status

            •      Red —contaminants offsite or projected to migrate offsite,

            •      Yellow —plume expanding but not expected to migrate offsite, or

            •      Green —plume static or shrinking in size.

                                                                                                7
o   Regulatory Status (assessment ongoing, remedial approach proposed, or decision
    document in place)

o   Treatment Status

    •   Red —remedial approaches are not performing as identified in decision
        documents,

    •    Yellow —remedial approaches are not performing optimally, or

    •   Green —remedial approaches are performing as identified in decision
        documents.

Assists in identifying and prioritizing technology needs and external review needs.

Identifies where potential remediation effort improvements can be made—turning

Red and Yellow designations into Green designations.




                                                                                      8
Hanford Site: Plume Map

                       100-NR-2 Operable Unit
                       Strontium-90, Sulfate, Diesel                                                               100-HR-3-D Operable Unit
                       Strontium-90 entering Columbia River. Pump and                                              Chromium
                       treat (P&T) not effective for strontium-90. Testing                                         Chromium entering Columbia River. Interim
                       in situ sequestration barrier.                                                              P&T and Barrier moderately effective. New
                       R&D: 1) phosphate injection barrier and 2)                                                  Expanded system under design and
                       phytoremediation (willows).                                                                 construction to meet aquatic standards at
                       ARRA: $4.5M for well drilling.                                                              river by 2012. Final ROD 2012
             100-KR-4 Operable Unit                                                                                R&D: 1) improved resin system
             Chromium                                                                                              implementation and 2) in situ chromium
             P&T effective, will be expanded; considering                                                          reduction (biological or chemical).
             augmenting P&T units with more effective                                                              ARRA: $5.44M well drilling, $3.01M pump
             technologies.                                                                                         and treat (100-HR-3-D and -H Areas
             ARRA: $4.95M for well drilling.                                                                       combined).

     100-BC-5 Operable Unit                                                                                                    100-HR-3-H Operable Unit
     Strontium-90, Chromium, Tritium                                                                                           Chromium
     No interim action decision requiring remediation.                                                                         Ongoing P&T effective in
     ARRA: $1.23M for monitoring well drilling.                                                                                controlling plume migration and
                                                                                                                               removing contaminants.
 200-ZP-1 Operable Unit                                                                                                        Expanded P&T to “Horn” plume
 Carbon Tetrachloride, Technetium-99                                                                                           between D and H.
 Interim P&T/vapor extraction providing
 partial containment of highest
 contaminant concentrations. Final ROD                                                                                         100-FR-3 Operable Unit
 for new expanded P&T approved                                                                                                 Strontium-90, Chromium, Nitrate, TCE
 September 2008. Design and                                                                                                    No interim action decision requiring
 construction underway                                                                                                         remediation.
 R&D: methods to predict plume                                                                                                 ARRA: $1.11M for monitoring well
 movement and contaminant degradation.                                                                                         drilling.
 ARRA: $80M to construct treatment
 facility and $6.73M for well drilling.                                                                                          300-FF-5 Operable Unit
                                                                                                                                 Uranium, TCE, cis-1,2-DCE
       200-UP-1 Operable Unit
                                                                                                                                 Uranium entering Columbia River,
       Uranium, Technetium-99
                                                                                                                                 natural attenuation not meeting
       P&T meeting interim remediation objectives. SX TF
                                                                                                                                 remediation goals; testing
       Tc-99 plume recently added. Final ROD will be
                                                                                                                                 sequestration technologies.
       amended to ZP-1 ROD 20010
                                                                                                                                 R&D: polyphosphate addition to
           200-BP-5 Operable Unit                                                                                                bind uranium.
           Uranium, Technetium-99                                                                                                ARRA: $1.94M for well drilling.
           Plume growing but not projected to migrate offsite.
           P&T treatability testing 2010, Final Rod 2011.                                                             1100-EM-1 Operable Unit
           ARRA: $2.76M for well drilling.                                                                            Trichloroethylene (TCE)
                                                                                                                      Operable Unit removed from the NPL.
                       200-PO-1 Operable Unit
                       Iodine-129, Tritium
                       No interim action decision requiring
                       remediation. Final ROD by 2011. Outline of                                                                                                9
                       plume shown on map in dashed line.
                                                                             (Note: Plume details not to scale.)
Hanford Site: Plume Assessments

                                                        Major       Current                     Regu-    Treat-
                                                                                       Plume
    Site       Contractor      Plume/Area       PBS#   Contami-     Plume     Source            latory   ment                                            Comments
                                                                                       Status
                                                        nants        Size                       Status   Status

                 Plateau
                                                 RL-    Sr, Cr,
Hanford Site   Remediation      100-BC-5                                                Red               NA      No active treatment required at this time.
                                                0030    Tritium
                Contractor

                 Plateau
                                                 RL-
Hanford Site   Remediation      100-FR-3                Sr, Cr                         Green              NA      No active treatment required at this time.
                                                0030
                Contractor

                 Plateau                                                                                          Cr is entering the Columbia River. P&T has been somewhat effective in controlling
                             100-HR-3-D/ 100-    RL-
Hanford Site   Remediation                                Cr                            Red              Yellow   migration and removing Cr. Larger treatment facilities are being designed and installed
                                 D North        0030
                Contractor                                                                                        to increase system performance.

                 Plateau                                                                                          Cr is entering the Columbia River. The selected remedy, an in situ barrier, has had
                             100-HR-3-D/ 100-    RL-
Hanford Site   Remediation                                Cr                            Red              Yellow   some breakthrough. Barrier mending and other alternative approaches being
                                 D South        0030
                Contractor                                                                                        investigated. Large P&T system being constructed to work in conjunction with barrier.

                 Plateau
                                                 RL-
Hanford Site   Remediation   100-HR-3/ 100-H              Cr                           Green             Green    P&T has been effective in controlling plume migration and removing Cr.
                                                0030
                Contractor

                 Plateau
                                                 RL-                                                              P&T has been effective. Expanded System has been constructed and is operating.
Hanford Site   Remediation      100-KR-4                  Cr                            Red              Yellow
                                                0030                                                              Also need to develop alternative treatment methods to supplement P&T.
                Contractor

                 Plateau
                                                 RL-   Sulfate,
Hanford Site   Remediation        100-N                                                 Red               NA      Diesel required to be removed from wells.
                                                0030   Diesel
                Contractor

                 Plateau                                                                                          Sr is entering the Columbia River. P&T has stabilized plume migration but has not
                                                 RL-
Hanford Site   Remediation   100-NR-2/ 100-N              Sr                            Red              Yellow   significantly reduced contaminant levels. The site is now testing apatite sequestration
                                                0030
                Contractor                                                                                        of the Sr and phytoremediation.

                 Plateau
                                                 RL-                                                              The plume is growing but not projected to migrate offsite. Treatability and pump tests
Hanford Site   Remediation      200-BP-5                Tc, U                          Yellow             NA
                                                0030                                                              will be conducted in 2010 and Final ROD will be issued in 2011
                Contractor

                 Plateau                                                                                          The plume has been shrinking in size naturally and no active remediation is expected.
                                                 RL-
Hanford Site   Remediation      200-PO-1               I, Tritium                       Red              Green    Migration of tritium into the Columbia River is currently only slightly above MCLs. A
                                                0030
                Contractor                                                                                        final ROD will be released in 2011.

                 Plateau
                                                 RL-                                                              Interim P&T is operating and recent ESD has added Tc-99 plume at SX Tank Farm.
Hanford Site   Remediation      200-UP-1                Tc, U                          Green             Green
                                                0030                                                              UP-1 final ROD will be added to ZP-1 ROD
                Contractor

                 Plateau                                                                                          Interim P&T operations have provided partial containment of high concentration portion
                                                 RL-
Hanford Site   Remediation      200-ZP-1               Car. Tet.                       Yellow            Yellow   of plume at top of the aquifer. Final ROD for new expanded system approved
                                                0030
                Contractor                                                                                        September 2008. New P&T system under construction.
                 Plateau
                              300-FF-5/ 300      RL-                                                              U is entering the Columbia River. The selected remedy, natural attenuation, did not
Hanford Site   Remediation                                 U                            Red               Red
                              Area U Plume      0030                                                              work and the site is investigating other approaches.
                Contractor

                                                                                                                                                                                          10
                                                                                Major            Current                             Regu-       Treat-
                                                                                                                         Plume
     Site             Contractor               Plume/Area           PBS#       Contami-          Plume       Source                  latory      ment                                              Comments
                                                                                                                         Status
                                                                                nants             Size                               Status      Status

                       Plateau
                                                                     RL-
Hanford Site         Remediation                 1100                              TCE                                   Green                   Green      Plume taken off the NPL.
                                                                    0030
                      Contractor


Major Contaminants: Contaminants in plume that required, currently require, or may require remediation.

Plume size (Current):         = Greater than 320 acres,       = 40 to 320 acres,           = Less than 40 acres

Source:        = Active,       = Controlled,        = Not Present
Plume Status: Red—Contaminants above MCLs/ACLs are currently offsite or projected to migrate offsite, Yellow—Plume is expanding but is not expected to migrate offsite above MCLs/ACLs, Green—Plume is static or shrinking in size.
MCL=maximum concentrations level (levels are promulgated standards). ACL=alternate concentration limit (levels are negotiated).

Regulatory Status:         = Assessment ongoing,        = Remedial approach proposed (i.e., Proposed Plan),           = Decision Document in place. Decision Documents are defined as legally binding agreements (i.e., RCRA or CERCLA Interim or
Final Records of Decision, Permits, Closure Plans, Corrective Actions, Interim Actions).

Treatment Status: Red—Remedial approaches are not performing as identified in Decision Documents, Yellow—Remedial approaches are not performing optimally (as identified in Decision Documents), Green—Remedial approaches are performing
as identified in Decision Documents.




                                                                                                                                                                                                                                     11
Idaho National Laboratory: Plume Map



                 Reactor Technology Complex (RTC)
                 WAG 2
                 Chromium
                 Remediation is not required —requires monitoring only.




                                                                                                                               Test Area North (TAN)
    Idaho Nuclear Technology and                                                                                               WAG 1
                                                                                                                               Trichloroethylene
    Engineering Center (INTEC)                                                                                                 In situ bioremediation, pump
    WAG 3                                                                                                                      and treat, and monitored
    Strontium, Nitrate, Technetium, Iodine                                                                                     natural attenuation.
    Final ROD involves capping and infiltration                                                                                Monitoring ongoing.
    controls with monitoring to ensure drinking
    water standards are met in a reasonable
    time frame for strontium. Nitrates,
    technetium, and iodine predicted to meet
    standards without remedial action.




 Radioactive Waste
 Management Complex (RWMC)
 WAG 7                                                                                                                Central Facilities Area (CFA)
 Carbon Tetrachloride
 Active vapor extraction system is in                                                                                 WAG 4
 place. Targeted waste removal to remove                                                                              Nitrate
 source and in situ grouting to inhibit                                                                               Remediation is not required—requires
 migration of contaminants. Monitoring                                                                                monitoring only.
                                                                Site Boundary
 on-going.
 ARRA: In situ grouting ($20.9M) and
 exhuming material ($102.8M).

                                                                                (Note: Plume details not to scale.)
                                                                                                                                                  12
Idaho National Laboratory: Plume Assessments

                                                                                 Major              Current                             Regu-       Treat-
                                                                                                                            Plume
     Site             Contractor                 Plume/Area           PBS#      Contami-            Plume       Source                  latory      ment                                              Comments
                                                                                                                            Status
                                                                                 nants               Size                               Status      Status
   Idaho                                                                       PCE, TCE,
                                                                                                                                                               In situ bioremediation for “hot spot,” pump and treat for medial zone, monitored natural
  National                 CWI                    WAG 1           ID-0030       DCE, Sr-                                    Green                   Green
                                                                                                                                                               attenuation for distal portion.
 Laboratory                                                                    90, Cs-137

   Idaho
  National                 CWI                    WAG 2           ID-0030             Cr                                    Green                   Green      Remediation is not required—continuous monitoring required and ongoing.
 Laboratory

   Idaho                                                                          Sr-90,                                                                       The remediation action identified by the ROD is capping and infiltration controls with
  National                 CWI                    WAG 3           ID-0030      Nitrate, Tc-                                 Green                   Green      monitoring to ensure drinking water standards are met in a reasonable timeframe for
 Laboratory                                                                     99, I-129                                                                      Sr-90, nitrate, Tc-99, and I-129.

   Idaho
  National                 CWI                    WAG 4           ID-0030           Nitrate                                 Green                   Green      Remediation is not required—continuous monitoring required and ongoing.
 Laboratory

   Idaho
                                                                                                                                                               Active vapor extraction system is in place. Targeted waste removal to remove source
  National                 CWI                    WAG 7           ID-0030       Car. Tet.                                   Green                   Green
                                                                                                                                                               and in situ grouting to inhibit migration of contaminants. Monitoring on-going.
 Laboratory


Major Contaminants: Contaminants in plume that required, currently require, or may require remediation.

Plume size (Current):         = Greater than 320 acres,        = 40 to 320 acres,             = Less than 40 acres

Source:        = Active,         = Controlled,        = Not Present
Plume Status: Red—Contaminants above MCLs/ACLs are currently offsite or projected to migrate offsite, Yellow—Plume is expanding but is not expected to migrate offsite above MCLs/ACLs, Green—Plume is static or shrinking in size.
MCL=maximum concentrations level (levels are promulgated standards). ACL=alternate concentration limit (levels are negotiated).

Regulatory Status:         = Assessment ongoing,         = Remedial approach proposed (i.e., Proposed Plan),             = Decision Document in place. Decision Documents are defined as legally binding agreements (i.e., RCRA or CERCLA Interim or
Final Records of Decision, Permits, Closure Plans, Corrective Actions, Interim Actions).

Treatment Status: Red—Remedial approaches are not performing as identified in Decision Documents, Yellow—Remedial approaches are not performing optimally (as identified in Decision Documents), Green—Remedial approaches are performing
as identified in Decision Documents.




                                                                                                                                                                                                                                        13
Lawrence Livermore National Laboratory Main Site (Site 200): Plume Map




                                                       LLNL




     Main Site Plume
     Co-mingled VOCs
     P&T is effective at hydraulically
     containing and treating the distal portions
     of the plume, while hydraulically isolating
     the contaminants in the source areas. Soil
     vapor extraction and dual extraction are
     being used to remove contaminants in the
     source areas.


                                                   Sandia National
                                                     Laboratory,
                                                      California




                                                                         14
Lawrence Livermore National Laboratory Main Site (Site 200): Plume Assessments

                                                                                Major            Current                             Regu-       Treat-
                                                                                                                         Plume
     Site             Contractor               Plume/Area           PBS#       Contami-          Plume       Source                  latory      ment                                              Comments
                                                                                                                         Status
                                                                                nants             Size                               Status      Status
                                                                              PCE, TCE,                                                                     P&T effective for systematically cleaning up and hydraulically containing plumes
  LLNL Site                                                          VL-
                                                                              hexavalent                                                                    migrating towards the site boundary. Enhanced source area remediation technologies
  200 (Main                LLNS                 Main Site           LLNL-                                                  Red                   Green
                                                                              chromium,                                                                     (bioremediation, subsurface heating, and mechanical fracturing) being evaluated and
    Site)                                                           0030
                                                                                tritium                                                                     field-tested to determine if full-scale implementation is warranted.


Major Contaminants: Contaminants in plume that required, currently require, or may require remediation.

Plume size (Current):         = Greater than 320 acres,       = 40 to 320 acres,           = Less than 40 acres

Source:        = Active,       = Controlled,        = Not Present
Plume Status: Red—Contaminants above MCLs/ACLs are currently offsite or projected to migrate offsite, Yellow—Plume is expanding but is not expected to migrate offsite above MCLs/ACLs, Green—Plume is static or shrinking in size.
MCL=maximum concentrations level (levels are promulgated standards). ACL=alternate concentration limit (levels are negotiated).

Regulatory Status:         = Assessment ongoing,       = Remedial approach proposed (i.e., Proposed Plan),            = Decision Document in place. Decision Documents are defined as legally binding agreements (i.e., RCRA or CERCLA Interim or
Final Records of Decision, Permits, Closure Plans, Corrective Actions, Interim Actions).

Treatment Status: Red—Remedial approaches are not performing as identified in Decision Documents, Yellow—Remedial approaches are not performing optimally (as identified in Decision Documents), Green—Remedial approaches are performing
as identified in Decision Documents.




                                                                                                                                                                                                                                     15
Lawrence Livermore National Laboratory Site 300: Plume Map

Building 865                                                                                   Pit 2 Landfill (OU8)
The regulatory agencies are                                                                    Remediation is not required. Risk & Hazard
evaluating the CERCLA pathway.                                                                 Management and monitoring are ongoing.


Pit 7 Complex (OU5)                                                                                         Building 801/Pit 8 Landfill (OU8)
Engineered landfill caps were                                                                               Remediation is not required. Risk & Hazard
installed on the Pit 4 and 7                                                                                Management and monitoring are ongoing.
Landfills in 1992. A hydraulic
drainage diversion system was
installed in 2008 to control
contaminant sources by                                                                                      Building 850 (OU5)
preventing groundwater from                                                                                 Risk & Hazard Management, monitoring, and
rising into the landfills. A                                                                                MNA are ongoing. Excavation, solidification, and
groundwater extraction and                                                                                  consolidation of PCP-, dioxin-, and furan-
treatment system is under                                                                                   contaminated soil is being conducted as a non-
construction. Risk & Hazard                                                                                 time-critical removal action in 2009.
Management, monitoring, and
MNA are ongoing



Building 851 (OU8)                                                                                                            Building 812 (OU9)
                                                                                                                              An RI/FS is in process.
Remediation is not required.
Risk & Hazard Management and                                              Building 832 (OU7)
monitoring are ongoing.                                                   Risk & Hazard Management,
                                                                          monitoring, MNA, and groundwater                                                                            Building 834 (OU2)
                                                                          and soil vapor extraction and                                                                               Risk & Hazard Management, monitoring, and
Building 845/Pit 9                                                        treatment are ongoing.                                                                                      groundwater and soil vapor extraction and
                                                                                                                                                                                      treatment are ongoing.
Landfill (OU8)
Remediation is not required.                                 Building 825-HE Burn Pit
Risk & Hazard Management
and monitoring are ongoing                                             (OU4)
                                                                                                                                                                                        Building 833 (OU8)
                                                                                                                                                                                        Remediation is not required. Risk & Hazard
                                                                    Perchlorate above MCL
                                                                                                                                                                                        Management and monitoring are ongoing
                                                                    at one well


Building 854 (OU6)                                                                                                                                                                     Building 830 (OU7)
Risk & Hazard Management,                                                                                                                                                              Risk & Hazard Management, monitoring,
monitoring, and groundwater and                                                                                                                                                        MNA, and groundwater and soil vapor
soil vapor extraction and                                                                                                                                                              extraction and treatment are ongoing.
treatment are ongoing. PCB-,
dioxin-, and furan-contaminated
soil was excavated in 2005.                                                                                                                 Eastern General Services Area (OU1)
                                                                                                                                            The groundwater extraction and treatment occurred from 1991 to 2007 when it was
                                                                                                                                            discontinued due to attainment of cleanup standards. Post-system shutdown monitoring for
                                                                                                                                            contaminant rebound is ongoing.
Pit 6 Landfill (OU3)                                  High Explosive (HE) Process Area (OU4)
An engineered landfill cap was installed in 1997 to   Risk & Hazard Management, monitoring, MNA, and groundwater                            Central General Services Area (OU1)
prevent contaminant releases. Risk & Hazard           extraction and treatment are ongoing. Former unlined HE rinsewater                    Monitoring and groundwater and soil vapor extraction and treatment are ongoing.
Management, monitoring, and MNA are ongoing.          lagoons and HE burn pit were capped and closed.

                                                                                                                                                                                                                         16
Lawrence Livermore National Laboratory Site 300: Plume Assessments

                                                Major       Current                     Regu-    Treat-
                                                                               Plume
  Site      Contractor   Plume/Area   PBS#     Contami-     Plume     Source            latory   ment                                          Comments
                                                                               Status
                                                nants        Size                       Status   Status
                                       VL-
LLNL Site
              LLNS       CGSA/OU1     LLNL-     VOCs                            Red              Green    Groundwater and soil vapor extraction and treatment were selected in the 1997 ROD.
  300
                                      0031
                                       VL-
LLNL Site                                                                                                 The groundwater treatment was discontinued in 2007 due to the attainment of cleanup
              LLNS       EGSA/OU1     LLNL-     VOCs                           Green             Green
  300                                                                                                     standards.
                                      0031
                                                VOCs,
                                       VL-
LLNL Site                                       TBOS/                                                     The Site-Wide 2008 ROD selected Risk & Hazard Management, Monitoring, and
              LLNS        834/OU2     LLNL-                                    Green             Green
  300                                          TKEBS,                                                     groundwater and soil vapor extraction and treatment as the selected remedy.
                                      0031
                                                Nitrate
                                               Tritium,
                                       VL-
LLNL Site                                       VOCs,                                                     The Site-Wide 2008 ROD selected Risk & Hazard Management, Monitoring, and MNA
              LLNS       Pit 6/OU3    LLNL-                                    Green             Green
  300                                           Nitrate,                                                  as the selected remedy.
                                      0031
                                              Perchlorate
                                       VL-    VOCs, HE,
LLNL Site                                                                                                 The Site-Wide 2008 ROD selected Risk & Hazard Management, Monitoring, MNA, and
              LLNS       HEPA/OU4     LLNL-     Nitrate,                       Yellow            Green
  300                                                                                                     groundwater extraction and treatment as the selected remedy.
                                      0031    Perchlorate
                                       VL-    Tritium, U,
LLNL Site                                                                                                 The Site-Wide 2008 ROD selected Risk & Hazard Management, Monitoring, and MNA
              LLNS        850/OU5     LLNL-     Nitrate,                       Green             Green
  300                                                                                                     as the selected remedy.
                                      0031    Perchlorate
                                                Tritium,
                                       VL-
LLNL Site                                      VOCs, U,                                                   The Site-Wide 2008 ROD selected Risk & Hazard Management, Monitoring, MNA,
              LLNS       Pit 7/OU5    LLNL-                                    Green             Green
  300                                           Nitrate,                                                  groundwater extraction and treatment, and source control as the selected remedy.
                                      0031
                                              Perchlorate
                                       VL-      VOCs,
LLNL Site                                                                                                 The Site-Wide 2008 ROD selected Risk & Hazard Management, Monitoring, and
              LLNS        854/OU6     LLNL-     Nitrate,                       Green             Green
  300                                                                                                     groundwater and soil vapor extraction and treatment as the selected remedy.
                                      0031    Perchlorate
                                       VL-      VOCs,
LLNL Site                                                                                                 The Site-Wide 2008 ROD selected Risk & Hazard Management, Monitoring, MNA, and
              LLNS        830/OU7     LLNL-     Nitrate,                       Green             Green
  300                                                                                                     groundwater and soil vapor extraction and treatment as the selected remedy.
                                      0031    Perchlorate
                                       VL-      VOCs,
LLNL Site                                                                                                 The Site-Wide 2008 ROD selected Risk & Hazard Management, Monitoring, MNA, and
              LLNS        832/OU7     LLNL-     Nitrate,                       Green             Green
  300                                                                                                     groundwater and soil vapor extraction and treatment as the selected remedy.
                                      0031    Perchlorate
                                       VL-
LLNL Site                                                                                                 The Site-Wide 2008 ROD selected Risk & Hazard Management and Monitoring as the
              LLNS        851/OU8     LLNL-       U                            Green             Green
  300                                                                                                     selected remedy.
                                      0031
                                       VL-
LLNL Site                                                                                                 The Site-Wide 2008 ROD selected Risk & Hazard Management and Monitoring as the
              LLNS        833/OU8     LLNL-     VOCs                           Green             Green
  300                                                                                                     selected remedy.
                                      0031

                                       VL-      VOCs,
LLNL Site                                                                                                 The Site-Wide 2008 ROD selected Risk & Hazard Management and Monitoring as the
              LLNS        801/OU8     LLNL-     Nitrate,                       Green             Green
  300                                                                                                     selected remedy.
                                      0031    Perchlorate

                                       VL-
LLNL Site                                                                                                 The Site-Wide 2008 ROD selected Risk & Hazard Management and Monitoring as the
              LLNS       Pit 2/OU8    LLNL-     Nitrate                        Green             Green
  300                                                                                                     selected remedy.
                                      0031


                                                                                                                                                                               17
                                                                                Major            Current                             Regu-       Treat-
                                                                                                                         Plume
     Site             Contractor               Plume/Area           PBS#       Contami-          Plume       Source                  latory      ment                                              Comments
                                                                                                                         Status
                                                                                nants             Size                               Status      Status
                                                                     VL-       VOCs, U,
  LLNL Site
                           LLNS                 812/OU9             LLNL-     HE, Nitrate,                               Green                     NA       RI/FS in process.
    300
                                                                    0031      Perchlorate
                                                                     VL-
  LLNL Site
                           LLNS                   865               LLNL-          VOCs                                  Green                     NA       The regulatory agencies are evaluating the CERCLA pathway.
    300
                                                                    0031

Major Contaminants: Contaminants in plume that required, currently require, or may require remediation.

Plume size (Current):         = Greater than 320 acres,       = 40 to 320 acres,           = Less than 40 acres

Source:        = Active,       = Controlled,        = Not Present
Plume Status: Red—Contaminants above MCLs/ACLs are currently offsite or projected to migrate offsite, Yellow—Plume is expanding but is not expected to migrate offsite above MCLs/ACLs, Green—Plume is static or shrinking in size.
MCL=maximum concentrations level (levels are promulgated standards). ACL=alternate concentration limit (levels are negotiated).

Regulatory Status:         = Assessment ongoing,        = Remedial approach proposed (i.e., Proposed Plan),           = Decision Document in place. Decision Documents are defined as legally binding agreements (i.e., RCRA or CERCLA Interim or
Final Records of Decision, Permits, Closure Plans, Corrective Actions, Interim Actions).

Treatment Status: Red—Remedial approaches are not performing as identified in Decision Documents, Yellow—Remedial approaches are not performing optimally (as identified in Decision Documents), Green—Remedial approaches are performing
as identified in Decision Documents.




                                                                                                                                                                                                                                     18
Los Alamos National Laboratory: Plume Map




                                            19
Los Alamos National Laboratory: Plume Assessments

                                                                                Major            Current                             Regu-       Treat-
                                                                                                                         Plume
     Site             Contractor               Plume/Area           PBS#       Contami-          Plume       Source                  latory      ment                                              Comments
                                                                                                                         Status
                                                                                nants             Size                               Status      Status
 Los Alamos          Los Alamos              Sandia/                                                                                                        Chromium is 16 times above State regulatory cleanup standards and 8 times above
                                                                    LANL-
  National            National              Mortandad                         Chromium                                   Green                     NA       EPA MCL in limited area. Extent of plume likely delineated, but final south
                                                                     0030
 Laboratory           Security           Canyon West Area                                                                                                   determination is pending. Investigation report due to regulator in August 2008.
                                                                              Explosives                                                                    Plume extent not yet fully delineated. Explosives are above EPA Health Advisory
 Los Alamos          Los Alamos
                                           Cañon De Valle           LANL-    (RDX,TNT),                                                                     Standards. Other contaminants are above background but below regulatory cleanup
  National            National                                                                     NA                    Green                     NA
                                               Area                  0030      Tritium,                                                                     standards. Corrective measures, passive reactive barrier, pump and treat, and
 Laboratory           Security
                                                                               Nitrate                                                                      monitored natural attenuation are being evaluated.

 Los Alamos          Los Alamos
                                               Los Alamos           LANL-       Nitrate,                                                                    Plume is limited and static. Contaminants are above background but below regulatory
  National            National                                                                     NA                      NA                      NA
                                               Canyon Area           0030       Tritium                                                                     cleanup standards. No active remediation required at this time.
 Laboratory           Security

                                                                                                                                                            Trace concentrations of tritium have been detected in one well. Low levels of VOCs
 Los Alamos          Los Alamos              Pajarito
                                                                    LANL-       Tritium,                                                                    are also present in several wells. Plume extent not yet fully delineated. Contaminants
  National            National             Canyon/TA-54                                            NA                      NA                      NA
                                                                     0030        VOCs                                                                       are above background but below regulatory cleanup standards. Further
 Laboratory           Security                 Area
                                                                                                                                                            characterization is pending to confirm presence and extent.
                                                                               Nitrate,
 Los Alamos          Los Alamos
                                           Pueblo Canyon            LANL-     Tritium,                                                                      Plume is limited and static. Contaminants are above background but below regulatory
  National            National                                                                     NA                      NA                      NA
                                               Area                  0030     Uranium,                                                                      cleanup standards. No active remediation required at this time.
 Laboratory           Security
                                                                             Perchlorate

 Los Alamos          Los Alamos              Sandia/                           Nitrate,
                                                                    LANL-                                                                                   Plume is limited and static. Contaminants are above background but below regulatory
  National            National              Mortandad                         Tritium,             NA                      NA                      NA
                                                                     0030                                                                                   cleanup standards. No active remediation required at this time.
 Laboratory           Security           Canyon East Area                    Perchlorate


Major Contaminants: Contaminants in plume that required, currently require, or may require remediation.

Plume size (Current):         = Greater than 320 acres,       = 40 to 320 acres,           = Less than 40 acres

Source:        = Active,       = Controlled,        = Not Present
Plume Status: Red—Contaminants above MCLs/ACLs are currently offsite or projected to migrate offsite, Yellow—Plume is expanding but is not expected to migrate offsite above MCLs/ACLs, Green—Plume is static or shrinking in size.
MCL=maximum concentrations level (levels are promulgated standards). ACL=alternate concentration limit (levels are negotiated).

Regulatory Status:         = Assessment ongoing,       = Remedial approach proposed (i.e., Proposed Plan),            = Decision Document in place. Decision Documents are defined as legally binding agreements (i.e., RCRA or CERCLA Interim or
Final Records of Decision, Permits, Closure Plans, Corrective Actions, Interim Actions).

Treatment Status: Red—Remedial approaches are not performing as identified in Decision Documents, Yellow—Remedial approaches are not performing optimally (as identified in Decision Documents), Green—Remedial approaches are performing
as identified in Decision Documents.




                                                                                                                                                                                                                                     20
Moab UMTRA Project: Plume Map




                                                                                        191
                                                                                  way
                                                                             High
                                                                        U.S.
       DOE Property Boundary




                                                                                                                        Former Millsite Plume
                                                                                                                        Uranium




                                                                                                 r
                                                                                              ive
                                                                                                                        The Former Millsite Plume is comingled
                                                                                                                        with the Tailing Pile Plume. Monitoring




                                                                                                                    e
                                  St




                                                                                                                 erv
                                   at




                                                                                                                        of groundwater and surface water are




                                                                                            R
                                      e
                                       Hi




                                                                                                             r es
                                                                                                                        ongoing. ARRA: Projected ARRA
                                          gh




                                                                                         do
                                                                                                                        funding $0.5M; the secondary source
                                             wa




                                                                                                           sP
                                               y




                                                                                                                        area for the plume will be excavated
                                                27




                                                                                     lora


                                                                                                             d
                                                                                                                        and the interim action well field may be
                                                   9




                                                                                                         tlan
                                                                                                                        expanded to include ground water




                                                                                                       We
                                                                                                                        extraction to increase contaminant



                                                                                   Co
                                                                                                                        mass removal




                                                                                                 s on
                                                                                                 the
                                                                                               Ma
                                                                                                         Tailing Pile Plume
                                                                                                         Ammonia and Uranium
                       N                                                                                 Ammonia and uranium in the tailings pile continue to
                                                                                                         contribute to groundwater contamination. Interim
                                                                                                         groundwater extraction to remove ammonia and uranium
                                                                                                         from the groundwater is ongoing and is protective of the
                               1,000      500          0        1,000                                    river. Monitoring has confirmed no contamination is being
                                                                                                         transported underneath the river to the Matheson
                                                Scale in Feet                                            Wetlands Preserve. ARRA: Projected ARRA funding
                                                                                                         $1M; the area affected by the interim action well field will
                                                                                                         be expanded.




                                                                                                                                                                        21
Moab UMTRA Project: Plume Assessments
                                                                                  Major          Current                             Regu-       Treat-
                                                                                                                         Plume
     Site             Contractor               Plume/Area             PBS#       Contami-        Plume       Source                  latory      ment                                              Comments
                                                                                                                         Status
                                                                                  nants           Size                               Status      Status
                                                                      CBC-                                                                                  Interim action (groundwater extraction) protects contaminants from entering Colorado
                                               Tailings Pile/                   Uranium,
 Moab Site         S&K Aerospace                                      Moab-                                                Red                   Green      River above negotiated levels. Groundwater is not potable due to natural high total
                                                150 acres                       Ammonia
                                                                      0031                                                                                  dissolved solids. Contamination slightly above MCLs has migrated offsite.

                                           Former Millsite/           CBC-                                                                                  Until final corrective action for groundwater is determined, no active treatment is being
 Moab Site         S&K Aerospace              35 acres                Moab-      Uranium                                 Green                     NA       performed. Contaminants not entering Colorado River above negotiated levels.
                                                                      0031                                                                                  Groundwater is not potable due to natural high total dissolved solids.


Major Contaminants: Contaminants in plume that required, currently require, or may require remediation.

Plume size (Current):         = Greater than 320 acres,         = 40 to 320 acres,         = Less than 40 acres

Source:        = Active,       = Controlled,          = Not Present
Plume Status: Red—Contaminants above MCLs/ACLs are currently offsite or projected to migrate offsite, Yellow—Plume is expanding but is not expected to migrate offsite above MCLs/ACLs, Green—Plume is static or shrinking in size.
MCL=maximum concentrations level (levels are promulgated standards). ACL=alternate concentration limit (levels are negotiated).

Regulatory Status:         = Assessment ongoing,         = Remedial approach proposed (i.e., Proposed Plan),          = Decision Document in place. Decision Documents are defined as legally binding agreements (i.e., RCRA or CERCLA Interim or
Final Records of Decision, Permits, Closure Plans, Corrective Actions, Interim Actions).

Treatment Status: Red—Remedial approaches are not performing as identified in Decision Documents, Yellow—Remedial approaches are not performing optimally (as identified in Decision Documents), Green—Remedial approaches are performing
as identified in Decision Documents.




                                                                                                                                                                                                                                     22
Nevada Test Site: Plume Map

Pahute Mesa CAU (Western and Central)
43 radionuclides; primarily tritium, C-14, Cl-36, I-
129, Pu-239, Tc-99
Closure in place with long term monitoring and                         Yucca Flat CAU
institutional control; regulatory metric is the                        43 radionuclides;
probability of exceeding SDWA.                                         primarily tritium,
ARRA: well drilling ($12.1 M)                                          C-14, Cl-36, I-129,
                                                                       Tc-99
                                                                       Closure in place
                                                                       with long term
                                                                       monitoring and
                                                                       institutional control;
                                                                       regulatory metric is
                                                                       the probability of
                                                                       exceeding SDWA.




                                                       Frenchman Flat CAU
                                                       43 radionuclides; tritium, C-14, Cl-
                                                       36, I-129, Tc-99
 Ranier Mesa Shoshone Mountain CAU                     Closure in place with long term
 43 radionuclides; primarily tritium, C-14,            monitoring and institutional control;
 Cl-36, I-129, Tc-99                                   regulatory metric is the probability
 Closure in place with long term monitoring            of exceeding SDWA.
 and institutional control; regulatory metric
 is the probability of exceeding SDWA.


                                                                                 23
Nevada Test Site: Plume Assessments

                                                                             Major              Current Plume                                   Regulatory       Treatment
      Site           Contractor         Plume/Area          PBS#                                                  Source      Plume Status                                                                 Comments
                                                                          Contaminants               Size                                        Status            Status

                                                                        H-3, C-14, Cl-36,
                                       Central Pahute
      NTS                  SNJV                       VL-NV-0030         I-129, Pu-239,                                           Yellow                             NA        61 Nuclear Tests within 100 m of the water table.
                                           Mesa
                                                                             Tc-99


                                                                        H-3, C-14, Cl-36,
      NTS                  SNJV        Frenchman Flat VL-NV-0030                                                                   Red                               NA        10 Nuclear Tests within 100 m of the water table.
                                                                          I-129, Tc-99


                                                                        H-3, C-14, Cl-36,
                                          Western
      NTS                  SNJV                           VL-NV-0030     I-129, Pu-239,                                            Red                               NA        18 Nuclear Tests within 100 m of the water table.
                                        Pahute Mesa
                                                                             Tc-99


                                                                        H-3, C-14, Cl-36,
      NTS                  SNJV          Yucca Flat       VL-NV-0030                                                              Yellow                             NA        170 Nuclear Tests within 100 m of the water table.
                                                                          I-129, Tc-99


                                                                        H-3, C-14, Cl-36,
      NTS                  SNJV         Rainier Mesa      VL-NV-0030                                                              Yellow                             NA        28 Nuclear Tests within perched water zone.
                                                                          I-129, Tc-99



Major Contaminants: Contaminants in plume that required, currently require, or may require remediation.

Plume size (Current):         = Greater than 320 acres,       = 40 to 320 acres,           = Less than 40 acres

Source:        = Active,       = Controlled,       = Not Present
Plume Status: Red—Contaminants above MCLs/ACLs are currently offsite or projected to migrate offsite, Yellow—Plume is expanding but is not expected to migrate offsite above MCLs/ACLs, Green—Plume is static or shrinking in size.
MCL=maximum concentrations level (levels are promulgated standards). ACL=alternate concentration limit (levels are negotiated).

Regulatory Status:         = Assessment ongoing,       = Remedial approach proposed (i.e., Proposed Plan),        = Decision Document in place. Decision Documents are defined as legally binding agreements (i.e., RCRA or CERCLA Interim or
Final Records of Decision, Permits, Closure Plans, Corrective Actions, Interim Actions).

Treatment Status: Red—Remedial approaches are not performing as identified in Decision Documents, Yellow—Remedial approaches are not performing optimally (as identified in Decision Documents), Green—Remedial approaches are performing
as identified in Decision Documents.




                                                                                                                                                                                                                                 24
Oak Ridge Reservation: Plume Map


                                                                                                            Bear Creek Valley
                                                                                                            Perchloroethylene, Dichloroethylene, Trichloroethylene,
 ETTP 1070-A                                                                                                Cadmium, Uranium, Technetium, Nitrates
 Trichloroethylene                                                                                          The reactive barrier did not perform as expected.
 Source removal followed by                                                                                 R&D: the DOE Office of Science is investigating
 monitored natural attenuation with                                                                         immobilization of uranium.
 land use controls being considered.                 1070-A


                                                                      Mitchell Branch/                                                               Y-12 UEFPC
                                                  K-27/K-29             Admin Area
 ETTP K-27/K-29                                                                                                             Site Bound               Trichloroethylene, Perchloroethylene, Vinyl
                                                                                                                                         ary         Chloride, Technetium, Uranium, Nitrates
 Dichloroethylene,
 Trichloroethylene, Vinyl                                                                             Bear Creek Valley                              Offsite VOC plume migration controlled by
 Chloride, Chromium                                                                                                                                  pump and treat.
 Considering monitored                                                                                                          Y-12 UEFPC
 natural attenuation with                                                         Central Bethel
 land use controls.                                                                  Valley
                                                                        West Bethel              East Bethel
                                                                          Valley                   Valley


ETTP Mitchell Branch/                                                            Melton Valley
Admin Area
Dichloroethylene, Trichloroethane,
Trichloroethylene, Technetium                                                                                                                                    East Bethel Valley
Remedial action did not perform as                                                                                                                               Trichloroethylene
anticipated. Considering technical                                                                                                                               Interim action remedy per Record
impracticability waiver. VOC                                                                                                                                     of Decision is bioremediation, to
treatability study ongoing.                                                                                                                                      begin in FY 2009.
                                                                                                                      3 Miles                                    ARRA: VOC treatability study
                                                                                                                                                                 funded.
         West Bethel Valley
         Strontium
         Contain and monitor. Cap source
         and divert up gradient water.                                                                                               Central Bethel Valley
         ARRA: Additional monitoring wells                                                                                           Mercury, Strontium, Tritium
         funded.                                                                                                                     Strontium contaminated groundwater sent to the Treatment
                                                                                                                                     Plant. Finish excavation of the source and continue pump and
                                                                                                                                     treat until acceptable negotiated levels are reached.
                                                                                                                                     ARRA: Groundwater actions for strontium plume being funded.
                                     Melton Valley
                                     Trichloroethylene, Cobalt, Strontium, Technetium, Uranium
                                     Completed Interim Record of Decision remedy. Final decision in 2015.

                                                                                                                                                                                         25
                                                                                (Note: Plume details not to scale.)
Oak Ridge Reservation: Plume Assessments

                                                                                Major            Current                             Regu-       Treat-
                                                                                                                         Plume
     Site             Contractor               Plume/Area           PBS#       Contami-          Plume       Source                  latory      ment                                              Comments
                                                                                                                         Status
                                                                                nants             Size                               Status      Status
                                                                              PCE,DCE,
Oak Ridge                                                        OR-                                                                                        The reactive barrier did not perform as expected. R&D: the DOE Office of Science is
                  Bechtel Jacobs         Bear Creek Valley                    TCE, Cd,                                   Yellow                   Red
Reservation                                                      0041                                                                                       investigating iodization of the U.
                                                                              U, Tc, Nit.
                                                                                                                                                            Sr contaminated GW sent to the Central Treatment Plant. Finish excavation of the
Oak Ridge                                Central Bethel          OR-          Hg, Sr,
                  Bechtel Jacobs                                                                                         Yellow                 Green       source and continue P&T until acceptable negotiated levels are reached. Early
Reservation                              Valley                  0042         Tritium
                                                                                                                                                            groundwater actions to improve plume containment funded by ARRA.

Oak Ridge                                                        OR-                                                                                        Remedy is bioremediation per ROD for interim actions. Interim actions to begin in FY
                  Bechtel Jacobs         East Bethel Valley                   TCE                                        Yellow                    NA
Reservation                                                      0042                                                                                       2009. VOC treatability study funded by ARRA.


Oak Ridge                                                        OR-
                  Bechtel Jacobs         ETTP 1070-A                          TCE                                        Yellow                  Green      Source removal. Considering MNA. No risks.
Reservation                                                      0040


Oak Ridge                                                        OR-          DCE, TCE,
                  Bechtel Jacobs         ETTP K-27/K-29                                                                  Yellow                    NA       Considering MNA. No current or future risks identified.
Reservation                                                      0040         VC, Cr

                                                                                                                                                            Remedial action did not perform as anticipated. No actions have been identified that
                                         ETTP Mitchell
Oak Ridge                                                        OR-          DCE, TCA,                                                                     can succeed. Considering TI Waiver for DNAPLs in the fractured bedrock. Conditions
                  Bechtel Jacobs         Branch/Admin                                                                    Yellow                 Yellow
Reservation                                                      0040         TCE, Tc                                                                       did not deteriorate upon cessation of the remedial action. VOC treatability study
                                         Area
                                                                                                                                                            ongoing

Oak Ridge                                                        OR-          TCE, Co,                                                                      Performance of hydraulic containment and seepage capture and containment exceed
                  Bechtel Jacobs         Melton Valley                                                                   Yellow                 Green
Reservation                                                      0042         Sr, Tc, U                                                                     ROD requirements. Final decision in 2015.

Oak Ridge                                                        OR-                                                                                        Contain and monitor. Cap and divert up gradient water. Additional groundwater
                  Bechtel Jacobs         West Bethel Valley                   Sr                                         Yellow                    NA
Reservation                                                      0042                                                                                       monitoring well installation funded by ARRA.

                                                                              TCE, PCE,
Oak Ridge                                                        OR-
                  Bechtel Jacobs         Y-12 UEFPC                           VC, Tc, U,                                 Green                  Green       Offsite VOC plume migration is controlled by P&T.
Reservation                                                      0041
                                                                              Nitrates
Major Contaminants: Contaminants in plume that required, currently require, or may require remediation.

Plume size (Current):         = Greater than 320 acres,       = 40 to 320 acres,           = Less than 40 acres

Source:        = Active,       = Controlled,        = Not Present
Plume Status: Red—Contaminants above MCLs/ACLs are currently offsite or projected to migrate offsite, Yellow—Plume is expanding but is not expected to migrate offsite above MCLs/ACLs, Green—Plume is static or shrinking in size.
MCL=maximum concentrations level (levels are promulgated standards). ACL=alternate concentration limit (levels are negotiated).

Regulatory Status:         = Assessment ongoing,       = Remedial approach proposed (i.e., Proposed Plan),            = Decision Document in place. Decision Documents are defined as legally binding agreements (i.e., RCRA or CERCLA Interim or
Final Records of Decision, Permits, Closure Plans, Corrective Actions, Interim Actions).

Treatment Status: Red—Remedial approaches are not performing as identified in Decision Documents, Yellow—Remedial approaches are not performing optimally (as identified in Decision Documents), Green—Remedial approaches are performing
as identified in Decision Documents.




                                                                                                                                                                                                                                     26
Paducah Gaseous Diffusion Plant: Plume Map

                                                                                               Ohio
                                                                                                      River




         Northwest Plume
         Trichloroethylene, Technetium-99
         Alternate water supply provided to residents. Pump and
         treat ongoing since 1995. Potential plume shift may have
         reduced the effectiveness at northern extraction points.
         R&D: Enzyme probe and carbon isotope utilized to
         positively identify trichloroethylene biodegradation in an
         aerobic environment.
                                                                                                                     Northeast Plume
                                                                                                                     Trichloroethylene, Technetium-99
                                                                                                                     Alternate water supply provided to
                                                                                                                     residents. Pump and treat ongoing
                                                                                                                     since 1997.




                     Southwest Plume
                     Trichloroethylene,
                     Technetium-99
                     Feasibility study ongoing to
                     evaluate remedial
                     alternatives.
                                                                                   0        1 Mile            Note: Electrical resistive heating under construction
                                                                                                              as an interim remedial action for the high
                                            PLANT NORTH




                                                          Si                           1 Kilometer
                                                               te                                             concentration C-400 trichloroethylene source area.
                                      RTH




                                       20                           Bo
                                                                      un
                                  E NO




                                                                           da
                                                                              ry
                                      TRU




                                                                                                                                                                      27
Paducah Gaseous Diffusion Plant: Plume Assessments

                                                                                Major            Current                             Regu-       Treat-
                                                                                                                         Plume
     Site             Contractor               Plume/Area           PBS#       Contami-          Plume       Source                  latory      ment                                              Comments
                                                                                                                         Status
                                                                                nants             Size                               Status      Status
                      Paducah                                                                                                                               Pump & treat interim action to control high concentration portion of plume has attained
  Paducah                                                            PA-           TCE
                     Remediation                   NE                                                                      Red                   Green      remedial objective. Current and future Tc concentrations, a contaminant defining the
   Plant                                                            0040            Tc
                      Services                                                                                                                              plume, not expected to exceed the current MCL (900 pCi/L) in offsite areas.

                      Paducah                                                                                                                               Plume shift has reduced pump & treat effectiveness. Pump & treat optimization under
  Paducah                                                            PA-           TCE
                     Remediation                  NW                                                                       Red                   Yellow     development. Primary DNAPL source control action in design phase. Current and
   Plant                                                            0040            Tc
                      Services                                                                                                                              future Tc concentrations not expected to exceed MCL in offsite areas.
                      Paducah                                                                                                                               Plume expansion possibly being attenuated by natural and anthropogenic recharge;
  Paducah                                                            PA-           TCE
                     Remediation                  SW                                                                     Yellow                    NA       however, additional monitoring needed to adequately determine down-gradient extent
   Plant                                                            0040            Tc
                      Services                                                                                                                              of plume. Contaminant concentrations not expected to exceed MCLs in offsite areas.


Major Contaminants: Contaminants in plume that required, currently require, or may require remediation.

Plume size (Current):         = Greater than 320 acres,       = 40 to 320 acres,           = Less than 40 acres

Source:        = Active,       = Controlled,        = Not Present
Plume Status: Red—Contaminants above MCLs/ACLs are currently offsite or projected to migrate offsite, Yellow—Plume is expanding but is not expected to migrate offsite above MCLs/ACLs, Green—Plume is static or shrinking in size.
MCL=maximum concentrations level (levels are promulgated standards). ACL=alternate concentration limit (levels are negotiated).

Regulatory Status:         = Assessment ongoing,        = Remedial approach proposed (i.e., Proposed Plan),           = Decision Document in place. Decision Documents are defined as legally binding agreements (i.e., RCRA or CERCLA Interim or
Final Records of Decision, Permits, Closure Plans, Corrective Actions, Interim Actions).

Treatment Status: Red—Remedial approaches are not performing as identified in Decision Documents, Yellow—Remedial approaches are not performing optimally (as identified in Decision Documents), Green—Remedial approaches are performing
as identified in Decision Documents.




                                                                                                                                                                                                                                     28
Pantex Plant: Plume Map




                          29
Pantex Plant: Plume Assessments
                                                                                              Current                           Regu-       Treat-
                                                                         Major                                      Plume
     Site         Contractor        Plume/Area            PBS#                                Plume       Source                latory      ment                                              Comments
                                                                      Contaminants                                  Status
                                                                                               Size                             Status      Status

                                                                    RDX and other                                                                      Ongoing P&T to remove contaminant mass and deplete areas of perched groundwater;
                      B&W                              VL-PX-
Pantex Plant                           Southeast                    HEs, Chromium,                                   Red                    Green      in situ bioremediation barrier near southern extent to prevent vertical migration to lower
                     Pantex                             0030
                                                                         TCE                                                                           aquifers.

                      B&W                              VL-PX-                                                                                          Diverging groundwater flow to southeast and southwest; in situ bioremediation barrier
Pantex Plant                           Zone 11                      Perchlorate, TCE                                 Red                    Green
                     Pantex                             0030                                                                                           installed in 2009.


Major Contaminants: Contaminants in plume that required, currently require, or may require remediation.

Plume size (Current):         = Greater than 320 acres,       = 40 to 320 acres,           = Less than 40 acres

Source:        = Active,       = Controlled,       = Not Present
Plume Status: Red—Contaminants above MCLs/ACLs are currently offsite or projected to migrate offsite, Yellow—Plume is expanding but is not expected to migrate offsite above MCLs/ACLs, Green—Plume is static or shrinking in size.
MCL=maximum concentrations level (levels are promulgated standards). ACL=alternate concentration limit (levels are negotiated).

Regulatory Status:         = Assessment ongoing,       = Remedial approach proposed (i.e., Proposed Plan),         = Decision Document in place. Decision Documents are defined as legally binding agreements (i.e., RCRA or CERCLA Interim or
Final Records of Decision, Permits, Closure Plans, Corrective Actions, Interim Actions).

Treatment Status: Red—Remedial approaches are not performing as identified in Decision Documents, Yellow—Remedial approaches are not performing optimally (as identified in Decision Documents), Green—Remedial approaches are performing
as identified in Decision Documents.




                                                                                                                                                                                                                                   30
Portsmouth Gaseous Diffusion Plant: Plume Map




                                                                                                                                                        X-701B Area Plume
                                                                                                                                                        Trichloroethylene, Technetium-99
                                                                                                              7-Unit                                    Groundwater collection and treatment ongoing
                                                                                                               Area    X-701B                           since 1991. In situ chemical oxidation in source
                                                                                                                        Area                            area from 2006-2008 with limited success in
                                                                                                                                                        upper soil horizons.
                                                                                                                                                        ARRA: $40M for expedited remedial actions.
    X-740 Area Plume                                                                    X-740 Area
    Trichloroethylene
    Phytoremediation ongoing since 1999                                                                                                                 7-Unit Area Plume
    and chemical oxidation in 2008, with                                                                                                                Trichloroethylene, Technetium-99
    limited effectiveness. Altered remedial                                                                                                             Groundwater collection and treatment via
    options are being evaluated.                                                                                                                        building sumps ongoing since 1989.
                                                                       Perimeter Road




                                                                                                                                                        Removal of source areas in 1998 and 2001.




                                                                                                                                DOE Property Boundary
                                                                                                     5-Unit                                             Additional potential source areas will be
                                                                                                      Area                                              investigated in 2009.


                                                                                                                                                        5-Unit Area Plume
                                               DOE Property Boundary




                                                                                                                                                        Trichloroethylene
                                                                                                                                                        Groundwater collection and
                                                                                                                                                        treatment ongoing since 1991;
                                                                                                                                                        upgraded with the installation of 12
   X-749/120 Area Plume                                                                 X-749/120                                                       additional extraction wells (11 in
   Trichloroethylene, Technetium-99                                                       Area                                                          2001 and 1 in 2009). Two source
   Numerous remedial actions : landfill                                                                                                                 areas capped in 2000.
   cap and barrier walls (1992), south
   barrier wall (1994), groundwater
   collection systems (1992 and 1997),
   phytoremediation (2002-2003), and
   extraction wells (2007). Extraction wells
   installed in the southern portion of the
   plume are controlling plume migration
   and reducing contaminant
   concentrations in off-site wells to below
   MCLs.



                                                                                                                                                                                                     31
Portsmouth Gaseous Diffusion Plant: Plume Assessments

                                                                                 Major           Current                             Regu-       Treat-
                                                                                                                         Plume
     Site             Contractor               Plume/Area           PBS#        Contami-         Plume       Source                  latory      ment                                               Comments
                                                                                                                         Status
                                                                                 nants            Size                               Status      Status
                                                                                                                                                            Groundwater extraction wells are controlling plume and reducing concentrations of
 Portsmouth              LATA/                                      PO-             TCE
                                                  5UA                                                                    Green                   Yellow     TCE, but not as effectively as predicted in Decision Document. An additional extraction
    Plant               Parallax                                    0040
                                                                                                                                                            well has been installed to address source beneath an existing building (deferred unit).

 Portsmouth              LATA/                                      PO-                                                                                     Contaminant migration is being controlled by building sumps. Primary sources have
                                                  7UA                           TCE, Tc                                  Green                   Green
    Plant               Parallax                                    0040                                                                                    been removed. An investigation of potential additional sources is underway.

                                                                                                                                                            Chemical oxidation has removed TCE from upper soil horizons, but does not appear to
 Portsmouth              LATA/                                      PO-
                                                 X-701B                         TCE, Tc                                  Green                   Yellow     have affected contaminant concentrations in lower clay soil horizons or in groundwater.
    Plant               Parallax                                    0040
                                                                                                                                                            Additional removal action is being funded under ARRA.

                                                                                                                                                            Phytoremediation (ongoing since 1999) and chemical oxidation (2008) have not
 Portsmouth              LATA/                                      PO-
                                                 X-740                              TCE                                  Green                    Red       affected TCE concentrations in groundwater. Alternate remedies for this area are
    Plant               Parallax                                    0040
                                                                                                                                                            being considered.
                                                                                                                                                            Installation of extraction wells near reservation boundary is controlling the migration of
 Portsmouth              LATA/                                      PO-                                                                                     the groundwater plume such that the plume is now contained on site.
                                               X-749/X-120                      TCE, Tc                                  Green                   Yellow
    Plant               Parallax                                    0040                                                                                    Phytoremediation may not be performing optimally. Barrier walls and collection
                                                                                                                                                            trenches around landfills are performing as expected,

Major Contaminants: Contaminants in plume that required, currently require, or may require remediation.

Plume size (Current):         = Greater than 320 acres,        = 40 to 320 acres,          = Less than 40 acres

Source:        = Active,       = Controlled,        = Not Present
Plume Status: Red—Contaminants above MCLs/ACLs are currently offsite or projected to migrate offsite, Yellow—Plume is expanding but is not expected to migrate offsite above MCLs/ACLs, Green—Plume is static or shrinking in size.
MCL=maximum concentrations level (levels are promulgated standards). ACL=alternate concentration limit (levels are negotiated).

Regulatory Status:         = Assessment ongoing,         = Remedial approach proposed (i.e., Proposed Plan),          = Decision Document in place. Decision Documents are defined as legally binding agreements (i.e., RCRA or CERCLA Interim or
Final Records of Decision, Permits, Closure Plans, Corrective Actions, Interim Actions).

Treatment Status: Red—Remedial approaches are not performing as identified in Decision Documents, Yellow—Remedial approaches are not performing optimally (as identified in Decision Documents), Green—Remedial approaches are performing
as identified in Decision Documents.




                                                                                                                                                                                                                                      32
Savannah River Site: Plume Map

      A/M Area
      Volatile Organic Compounds
                                                                                                                                                        GSA Area (E, F/H, and Mixed
      Thermal treatment, soil vapor extraction,                                                                                                         Waste Management Areas)
      chemical oxidation with soil vapor extraction                                                                                                     Metals, Tritium, Radionuclides,
      for hotspot treatment, pump & treat, and                                                                                                          Nitrates, Lead, Volatile Organic
      recirculation wells.                                                                  y                                                           Compounds
                                                                                    dar
      R&D: in situ fracturing and oil emplacement                                oun                                                                    Barrier walls with base injection at
                                                                           Sit eB                                                                       funnel and gate. Low permeable cap
      for partitioning & bioremediation.
      ARRA: $19,094K.                                                                                                                                   on sources and phyto-irrigation.
                                                                                                                                                        R&D: In situ geochemical remediation
                                                                           A/M                                                                          of I-129.
 B Area (Sanitary Landfill)                                                                                                                             ARRA $21,433K.
 Volatile Organic Compounds, Tritium
 RCRA cap over source. Biosparging
                                                                                          GSA                                                                 R Area
 completed. Monitored natural attenuation.                                    B                                                                               Volatile Organic Compounds,
 ARRA: $667K.                                                                                             R                                                   Tritium, Strontium
                                                                                                                                                              Monitored natural attenuation
                                                                                                N                                                             and mixing zone.
C Area                                                                            C
                                                                                                                                                              ARRA: $2,092K.
Volatile Organic Compounds, Tritium                                                                 CMP   P
Soil vapor extraction for source and                               TNX
vadose zone, monitored natural                                                        K               L
attenuation for VOCs in groundwater.                                      D
R&D: electrical resistant heating for                                                                                                                           N Area (Central
source treatment.                                                                                                                                               Shops)
ARRA: $2,236K.                                                                                                                                                  Volatile Organic Compounds
                                                                                                                                                                Under assessment.

   TNX Area
   Volatile Organic Compounds
   Soil vapor extraction and pump & treat.
   R&D: bioremediation using oil emulsion.                                                                                                              P Area
   ARRA: $2,234K.                                                                                                                                       Volatile Organic Compounds, Tritium
                                                                                                                                                        Chemical oxidation and soil vapor
           D Area                                                                                                                                       extraction.
           Volatile Organic Compounds, Tritium, Metals                                                                                                  R&D: microbial remediation for VOCs
           Monitored natural attenuation and mixing zone.                                                                                               in groundwater
           Non-time critical removal actions: soil vapor                                                                                                ARRA: $6.277K.
           extraction for VOC sources, heat treatment of
           tritium source, and pH adjustment with source                                                                                      CMP Pits
           removal for metals.                                K Area                                                                          Volatile Organic Compounds, Pesticides
           R&D: heat treatment of tritium source materials.   Volatile Organic Compounds,                                                     Thermal treatment with soil vapor extraction
           ARRA: $619K.                                       Tritium                                                                         for source, followed by monitored natural
                                    N                         Monitored natural attenuation                                                   attenuation.
                                                              and mixing zone.                                L-Area                          ARRA: $590K
                                                              ARRA: $529K divided between               Volatile Organic Compounds, Tritium
                                                              K, P and L Area Burning/                  Monitored natural attenuation and
                                                                                                        mixing zone.
                                                                                                                                                                                 33
                                                              Rubble Pits.
                                                                                                        ARRA: $483K.
                                                                          (Note: Plume details not to scale.)
Savannah River Site: Plume Assessments

                                                        Major        Current                     Regu-    Treat-
                                                                                        Plume
   Site      Contractor      Plume/Area        PBS#    Contami-      Plume     Source            latory   ment                                            Comments
                                                                                        Status
                                                        nants         Size                       Status   Status
                          A-Area Burning/                                                                          Recirculation wells operating under interim action. MNA proposed as final action.
Savannah                                       SR-    PCE, TCE,
              WSRC        Rubble Pits/Misc.                                             Yellow            Green    Plume size increasing slightly while contaminant mass decreasing. Administratively,
River Site                                     0030     DCE
                           Chemical Basin                                                                          this plume has been incorporated with the A/M Area Groundwater under RCRA.
                                                                                                                   Steam stripping, SVE, P&T, and recirculation wells. R&D: Fracturing and oil
Savannah                     A/M Area          SR-
              WSRC                                    PCE, TCE                          Yellow            Green    emplacement. Final actions TBD. Remediation time and cost will be very high unless
River Site                  Groundwater        0030
                                                                                                                   alternative technologies are effective.
                               C Area
Savannah                                       SR-    TCE, DCE,
              WSRC         Burning/Rubble                                               Green             Green    Monitored natural attenuation (MNA).
River Site                                     0030      VC
                                Pits

                              C-Area
Savannah                                       SR-       TCE,                                                      Assessment phase, final action TBD. R&D: TCE source treated by electrical resistance
              WSRC          Groundwater                                                 Yellow             NA
River Site                                     0030     Tritium                                                    heating (ERH).
                            Operable Unit

Savannah                  Central Shops GW     SR-
              WSRC                                       TCE                            Green              NA      Assessment phase, final action TBD.
River Site                        OU           0030


Savannah                                       SR-
              WSRC            CMP Pits                PCE, TCE                          Green             Green    MNA. Source will be treated via ERH.
River Site                                     0030

                                                          TCE,
Savannah                      D-Area           SR-                                                                 Assessment phase, final action TBD. Modeling shows MNA viable. R&D: high
              WSRC                                    Tritium, Be,                      Yellow             NA
River Site                  Groundwater        0030                                                                concentration metals treated by bioremediation.
                                                            U

Savannah                     D-Area Oil        SR-    PCE, TCE,                                                    MNA/mixing zone. Revised mixing zone evaluation indicates degradation and falling
              WSRC                                                                      Green             Green
River Site                 Seepage Basin       0030    DCE, VC                                                     concentrations.

Savannah                                       SR-
              WSRC          GSA Eastern                 Tritium                         Green              NA      Four primary sources removed. Final actions TBD.
River Site                                     0030

                                                         PCE,
Savannah                                       SR-
              WSRC          GSA Western                Tritium, I,                      Green              NA      Source control covers at two units. Final actions TBD.
River Site                                     0030
                                                           Tc

Savannah                   F Area Seepage      SR-    Tritium, Cd,                                                 Base injection at funnel and gate, barrier wall. Alternate remedial strategies for I-129
              WSRC                                                                      Yellow            Yellow
River Site                     Basins          0030   U, I, Sr, Tc                                                 under investigation, otherwise remediation will be very costly.

Savannah                   H Area Seepage      SR-    Tritium, Hg,                                                 Barrier wall. Alternative strategies for I-129 under investigation, otherwise remediation
              WSRC                                                                      Yellow            Yellow
River Site                     Basins          0030     I, Sr, Tc                                                  will be very costly.

Savannah                        K Area         SR-
              WSRC                                    TCE, PCE                          Green             Green    MNA/mixing zone
River Site                Burning/Rubble Pit   0030

                              K Area
Savannah                                       SR-    PCE, TCE,
              WSRC          Groundwater                                                 Yellow             NA      Assessment phase, final actions TBD.
River Site                                     0030    Tritium
                            Operable Unit


                                                                                                                                                                                            34
                                                                                 Major           Current                             Regu-       Treat-
                                                                                                                         Plume
     Site             Contractor               Plume/Area            PBS#       Contami-         Plume       Source                  latory      ment                                              Comments
                                                                                                                         Status
                                                                                 nants            Size                               Status      Status

 Savannah                                      L Area                SR-
                           WSRC                                                 Car. Tet.                                Green                   Green      MNA/mixing zone
 River Site                              Burning/Rubble Pit          0030


 Savannah                                 L Area Southern            SR-       PCE, TCE,
                           WSRC                                                                                          Green                   Green      MNA
 River Site                                 Groundwater              0030       Tritium

                                           Mixed Waste
 Savannah                                                            SR-        Tritium,
                           WSRC          Manag. Facility NE                                                              Green                   Green      Low permeability cap on source. MNA proposed as part of final action.
 River Site                                                          0030      TCE, DCE
                                              Plume
                                            Mixed Waste
 Savannah                                                            SR-        Tritium,                                                                    Low permeability cap on source. MNA proposed as part of final action,
                           WSRC            Manag. Facility                                                               Green                   Green
 River Site                                                          0030        TCE                                                                        phytoremediation if needed at creek.
                                             NW Plume
                                           Mixed Waste
 Savannah                                                            SR-        Tritium,
                           WSRC          Manag. Facility SE                                                              Green                   Green      Low permeability cap on source. MNA proposed as part of final action.
 River Site                                                          0030        TCE
                                              Plume
                                            Mixed Waste
 Savannah                                                            SR-        Tritium,
                           WSRC            Manag. Facility                                                               Green                   Green      Low permeability cap on source. Phytoirrigation.
 River Site                                                          0030        TCE
                                             SW Plume
                                                 P-Area                        PCE, TCE,
 Savannah                                                            SR-
                           WSRC                Groundwater                     DCE, VC,                                  Yellow                    NA       Assessment phase, final action TBD.
 River Site                                                          0030
                                               Operable Unit                    Tritium

 Savannah                                                            SR-
                           WSRC           R Seepage Basin                           Sr                                   Green                   Green      MNA/mixing zone
 River Site                                                          0030

                                                 R-Area
 Savannah                                                            SR-       PCE, TCE,
                           WSRC                Groundwater                                                               Yellow                    NA       Assessment phase, MNA proposed.
 River Site                                                          0030       Tritium
                                               Operable Unit
                                                                               PCE, TCE,
 Savannah                                                            SR-                                                                                    Biosparging transitioned to MNA (first Alternate Concentration Limit approved in state
                           WSRC            Sanitary Landfill                   DCE, VC,                                  Green                   Green
 River Site                                                          0030                                                                                   of South Carolina).
                                                                                Tritium

 Savannah                                                            SR-                                                                                    Interim P&T (air stripping). R&D: bioremediation using oil emulsion will be proposed as
                           WSRC                    TNX                              TCE                                  Green                   Green
 River Site                                                          0030                                                                                   final remedy.


Major Contaminants: Contaminants in plume that required, currently require, or may require remediation.

Plume size (Current):         = Greater than 320 acres,        = 40 to 320 acres,          = Less than 40 acres

Source:        = Active,       = Controlled,         = Not Present
Plume Status: Red—Contaminants above MCLs/ACLs are currently offsite or projected to migrate offsite, Yellow—Plume is expanding but is not expected to migrate offsite above MCLs/ACLs, Green—Plume is static or shrinking in size.
MCL=maximum concentrations level (levels are promulgated standards). ACL=alternate concentration limit (levels are negotiated).

Regulatory Status:         = Assessment ongoing,         = Remedial approach proposed (i.e., Proposed Plan),          = Decision Document in place. Decision Documents are defined as legally binding agreements (i.e., RCRA or CERCLA Interim or
Final Records of Decision, Permits, Closure Plans, Corrective Actions, Interim Actions).

Treatment Status: Red—Remedial approaches are not performing as identified in Decision Documents, Yellow—Remedial approaches are not performing optimally (as identified in Decision Documents), Green—Remedial approaches are performing
as identified in Decision Documents.




                                                                                                                                                                                                                                     35
West Valley Demonstration Project: Plume Map

             N
                                                                                                      WMA 1, 2, 3, 4, 5 Plume
                                                                                                      Strontium
                                                                                                      The plume has two operational mitigation technologies. Pump and treat on
                                                                                                      the west side has slowed migration, but strontium surfaces in a drainage ditch
                                                                                                      within the fence line above DOE derived concentration guideline levels
                                                                                                      (DCGLs). Off-site point of compliance locations are predicted to remain below
                                                     ry                                               DCGLs. A permeable reactive barrier on the east side has experienced some
                                                 a
                                              nd                                                      bypass. Final remediation options are under evaluation in an on-going site
                                        B   ou                                 WMA 4                  Environmental Impact Statement. Interim mitigation to prevent further
                             S   it e                                                                 migration/expansion of the plume includes a proposed Permeable Reactive
                                                                                                      Barrier depicted in red on the diagram. ARRA: this is an ARRA project.
                                            Waste Management
                                              Area (WMA) 5

                                                                                                                                    WMA 2 Plume
                                                                                                                                    Strontium, Cesium, and Tritium
                                                          WMA 3               WMA 2                                                 The plume has only migrated a short distance.
                                                                                                                                    Concentrations are predicted to remain below
                                                                                                                                    DCGLs at the point of compliance. Final
                                                                                                                                    remediation options are under evaluation in an
                                                                                                                                    on-going site Environmental Impact Statement.
                                                              WMA 1




                                                                      WMA 6

                                                             WMA 10                      WMA 7
      75      0         75                                                            NRC-Licensed
       Scale in Meters                                                                Disposal Area
                                                                                                               WMA 8
      250     0     250                                                                                    State-Licensed
                                                                                                           Disposal Area
        Scale in Feet

                                                                                        WMA 9




                                                                                                                                                                                       36
West Valley Demonstration Project: Plume Assessments

                                                                                Major           Current                             Regu-       Treat-
                                                                                                                        Plume
     Site             Contractor               Plume/Area           PBS#       Contami-         Plume       Source                  latory      ment                                              Comments
                                                                                                                        Status
                                                                                nants            Size                               Status      Status
                                                                                                                                                           Pump and treat and a small permeable reactive barrier have reduced contaminant
West Valley          West Valley                                  OH-
                                                                              Strontium,                                                                   levels, but the permeable reactive barrier has experienced some bypass. Final
Demonstra-          Environmental          WMA-1,2,3,4,5         WVDP-                                                  Yellow                  Yellow
                                                                               Cesium                                                                      remediation options are under evaluation. A proposed permeable reactive barrier is
tion Project          Services                                    0040
                                                                                                                                                           being planned as an ARRA project at this location.
West Valley          West Valley                                  OH-         Strontium,                                                                   Plume consists of a non-mobile cesium and mobile strontium and tritium. The plume
Demonstra-          Environmental               WMA-2            WVDP-         Tritium,                                 Yellow                  Yellow     has only migrated a short distance. At the point of compliance, contaminants predicted
tion Project          Services                                    0040         Cesium                                                                      to remain below negotiated levels. Final remediation options are under evaluation.


Major Contaminants: Contaminants in plume that required, currently require, or may require remediation.

Plume size (Current):         = Greater than 320 acres,       = 40 to 320 acres,           = Less than 40 acres

Source:        = Active,       = Controlled,        = Not Present
Plume Status: Red—Contaminants above MCLs/ACLs are currently offsite or projected to migrate offsite, Yellow—Plume is expanding but is not expected to migrate offsite above MCLs/ACLs, Green—Plume is static or shrinking in size.
MCL=maximum concentrations level (levels are promulgated standards). ACL=alternate concentration limit (levels are negotiated).

Regulatory Status:         = Assessment ongoing,       = Remedial approach proposed (i.e., Proposed Plan),           = Decision Document in place. Decision Documents are defined as legally binding agreements (i.e., RCRA or CERCLA Interim or
Final Records of Decision, Permits, Closure Plans, Corrective Actions, Interim Actions).

Treatment Status: Red—Remedial approaches are not performing as identified in Decision Documents, Yellow—Remedial approaches are not performing optimally (as identified in Decision Documents), Green—Remedial approaches are performing
as identified in Decision Documents.

.




                                                                                                                                                                                                                                    37