Physico-Chemical Analysis of Groundwater, RO Water, RO Waste Water and Conser...
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
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
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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
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
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Notas del editor
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.