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Madrid 1 , V.M., Gregory 1 , S., Verce 1 , M.F., Radyk 1 , J., Singleton 2 , M, Eaton 2 , G., Esser 2  B. K.   1 Environmental Restoration Division ,  2 Chemical Sciences Division   Lawrence Livermore National Laboratory UCRL-PRES-228848 UCRL-PRES-XXXXXX This work was performed under the auspices of the U.S. Department of Energy by the University of California, Lawrence Livermore National Laboratory under contract No. W-7405-Eng-48. A Stable Isotope Tracer Experiment Using Hetch-Hetchy Water  D = -104‰   18 O = -14.0‰  D = - 44‰  18 O= - 3.4‰
Talk Outline  •  Site Background •  Objectives •  Experiment Design •  Data •  Results •  Conclusions
Site 300 location map T2 test area
Isotope studies at Site 300 3 H 235 U/ 238 U  18 O,  D (H 2 O)  15 N,  18 O (NO 3 )
Typical Site 300 Contaminant Source area ,[object Object],[object Object],[object Object],[object Object],[object Object]
Site Air Photo VOC plume T2 tracer experiment
Overall Objective  Evaluate feasibility of reagent injection as a source area cleanup technology using an existing well field. Phase 1:  Tracer Test Emphasize  Performance  Monitoring Emphasize  Cleanup Phase 3:  Multi-well, source area cleanup  Phase 2:  Reagent injection Injection rate Area-of-influence Tracer / ground water mixing
Tracer Experiment Design ,[object Object],[object Object],[object Object], D = -104‰   18 O = -14.0‰  D = - 44‰  18 O= - 3.4‰
Why Hetch-Hetchy Water?   ,[object Object],[object Object],[object Object],[object Object]
Performance Monitoring ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
T2 site map [920.3] [919.4] [ 921.6 ] [918.6] [916.8] [918.3] 922 920 918 Pre-injection ground water  elevation contour Ground water flow  direction dry dry
Cross section A – A' K = 10 -4  - 10 -6   cm/sec K =  <  10 -6   cm/sec Injection well
Outcrop of gravel / clay contact Tps clay  perching  horizon Calcium carbonate cemented gravel Caliche-filled fractures Friable, medium-grained  sand Tpsg gravel  1 meter
Observation well hydrographs 916 918 920 922 924 926 16-Nov-2004 15-Dec-2004 13-Jan-2005 11-Feb-2005 12-Mar-2005 10-Apr-2005 9-May-2005 7-Jun-2005 GWE (ft MSL) -T2A -T2 -1825 -T2D -T2B -1833 START  STOP  RE-START Pre-injection Dual isotope sample  Daily Rain (inches) daily rain
[object Object], 18 O Start of Injection Dual isotope sample
Specific Conductance  Specific Conductance (µS) Start of Injection Dual isotope sample
Pre-injection isotope signatures Hetch-Hetchy Tracer   Ground water  (pre-injection ) S300 precipitation (2006)  D  18 O =  Tracer fraction SMOW 25% 50% 75% Tracer-ground water mixing line [(  18 O sample -   18 O gw ) 2 +  (  D sample -   D gw  ) 2 ] 1/2 [(  18 O HH -   18 O gw ) 2 +  (  D HH -   D gw  ) 2 ] 1/2
Plot of all   18O &   D data Hetch-Hetchy Tracer    D  18 O SMOW Ground water  (pre-injection ) 25% 50% 75% Tracer-ground water mixing line
Isotope plots for individual wells tracer  18 O  D tracer 1833 1 2 3 4 5 6 7 - 1 1 0 - 1 0 0 - 9 0 - 8 0 - 7 0 - 6 0 - 5 0 - 4 0 - 3 0 - 2 0 - 1 0 0 - 1 5 - 1 4 - 1 3 - 1 2 - 1 1 - 1 0 - 9 - 8 - 7 - 6 - 5 - 4 - 3 - 2 - 1 0  18 O  D tracer T2  18 O  D T2A  18 O  D tracer 1825 1 2 4 5 6 7 1 3 4 5 6 7 1 2 3 4 5 6 3 2 7 1: Jan 13 2: Mar 1 3: Apr 15 4: May 23 5: Jul 21 6: Aug 18 7: Sep 13 Start injection Stop injection Low  salinity arrives  High salinity arrives
Time-series plot of tracer fraction Start of Injection End of Injection Change in salinity observed at T2 & 1825
Time-series tracer distribution Pre-injection Jan 21 May 23 July 21 -1824 -T2 -1825 -1833 -T2A -T2B -T2D -T2C 5 10 25 50 75 5 10 25 50 5 10 25 50 75 Post-injection Sep 13
Ground water  flow direction Injection well Extent of saturation May 23 July 21 Post-injection Sep 13 20,000 10,000 1,000 100 20,000 20,000 10,000 1,000 20,000 10,000 1,000 Pre-injection Jan 21 Time-series VOC distribution -1824 -T2 -1825 -1833 -T2A -T2B -T2D -T2C
Results ,[object Object],[object Object],[object Object],[object Object],[object Object]
Conclusions ,[object Object],[object Object],[object Object],[object Object],[object Object]
Acknowledgements ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

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Tracer Experiment using Hetch-Hetchy Water

  • 1. Madrid 1 , V.M., Gregory 1 , S., Verce 1 , M.F., Radyk 1 , J., Singleton 2 , M, Eaton 2 , G., Esser 2 B. K. 1 Environmental Restoration Division , 2 Chemical Sciences Division Lawrence Livermore National Laboratory UCRL-PRES-228848 UCRL-PRES-XXXXXX This work was performed under the auspices of the U.S. Department of Energy by the University of California, Lawrence Livermore National Laboratory under contract No. W-7405-Eng-48. A Stable Isotope Tracer Experiment Using Hetch-Hetchy Water  D = -104‰  18 O = -14.0‰  D = - 44‰  18 O= - 3.4‰
  • 2. Talk Outline • Site Background • Objectives • Experiment Design • Data • Results • Conclusions
  • 3. Site 300 location map T2 test area
  • 4. Isotope studies at Site 300 3 H 235 U/ 238 U  18 O,  D (H 2 O)  15 N,  18 O (NO 3 )
  • 5.
  • 6. Site Air Photo VOC plume T2 tracer experiment
  • 7. Overall Objective Evaluate feasibility of reagent injection as a source area cleanup technology using an existing well field. Phase 1: Tracer Test Emphasize Performance Monitoring Emphasize Cleanup Phase 3: Multi-well, source area cleanup Phase 2: Reagent injection Injection rate Area-of-influence Tracer / ground water mixing
  • 8.
  • 9.
  • 10.
  • 11. T2 site map [920.3] [919.4] [ 921.6 ] [918.6] [916.8] [918.3] 922 920 918 Pre-injection ground water elevation contour Ground water flow direction dry dry
  • 12. Cross section A – A' K = 10 -4 - 10 -6 cm/sec K = < 10 -6 cm/sec Injection well
  • 13. Outcrop of gravel / clay contact Tps clay perching horizon Calcium carbonate cemented gravel Caliche-filled fractures Friable, medium-grained sand Tpsg gravel 1 meter
  • 14. Observation well hydrographs 916 918 920 922 924 926 16-Nov-2004 15-Dec-2004 13-Jan-2005 11-Feb-2005 12-Mar-2005 10-Apr-2005 9-May-2005 7-Jun-2005 GWE (ft MSL) -T2A -T2 -1825 -T2D -T2B -1833 START STOP RE-START Pre-injection Dual isotope sample Daily Rain (inches) daily rain
  • 15.
  • 16. Specific Conductance Specific Conductance (µS) Start of Injection Dual isotope sample
  • 17. Pre-injection isotope signatures Hetch-Hetchy Tracer Ground water (pre-injection ) S300 precipitation (2006)  D  18 O = Tracer fraction SMOW 25% 50% 75% Tracer-ground water mixing line [(  18 O sample -  18 O gw ) 2 + (  D sample -  D gw ) 2 ] 1/2 [(  18 O HH -  18 O gw ) 2 + (  D HH -  D gw ) 2 ] 1/2
  • 18. Plot of all  18O &  D data Hetch-Hetchy Tracer  D  18 O SMOW Ground water (pre-injection ) 25% 50% 75% Tracer-ground water mixing line
  • 19. Isotope plots for individual wells tracer  18 O  D tracer 1833 1 2 3 4 5 6 7 - 1 1 0 - 1 0 0 - 9 0 - 8 0 - 7 0 - 6 0 - 5 0 - 4 0 - 3 0 - 2 0 - 1 0 0 - 1 5 - 1 4 - 1 3 - 1 2 - 1 1 - 1 0 - 9 - 8 - 7 - 6 - 5 - 4 - 3 - 2 - 1 0  18 O  D tracer T2  18 O  D T2A  18 O  D tracer 1825 1 2 4 5 6 7 1 3 4 5 6 7 1 2 3 4 5 6 3 2 7 1: Jan 13 2: Mar 1 3: Apr 15 4: May 23 5: Jul 21 6: Aug 18 7: Sep 13 Start injection Stop injection Low salinity arrives High salinity arrives
  • 20. Time-series plot of tracer fraction Start of Injection End of Injection Change in salinity observed at T2 & 1825
  • 21. Time-series tracer distribution Pre-injection Jan 21 May 23 July 21 -1824 -T2 -1825 -1833 -T2A -T2B -T2D -T2C 5 10 25 50 75 5 10 25 50 5 10 25 50 75 Post-injection Sep 13
  • 22. Ground water flow direction Injection well Extent of saturation May 23 July 21 Post-injection Sep 13 20,000 10,000 1,000 100 20,000 20,000 10,000 1,000 20,000 10,000 1,000 Pre-injection Jan 21 Time-series VOC distribution -1824 -T2 -1825 -1833 -T2A -T2B -T2D -T2C
  • 23.
  • 24.
  • 25.

Notas del editor

  1. At our site, perchlorate usually exists with different contaminants across the site. Therefore, we need to develop strategies that deal with multiple areas that have multiple contaminants--and this pushes us to use smaller, portable treatment units and often systems in tandem with each other. Distributed plumes drive the need for portable units and the reuse of these treatment units once done at one area, for the next area.