Technology Status Report: In Situ Flushing - CLU-IN

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In Situ Flushing Project Summaries GWRTAC Case Study Database Sensitivity analysis on air stripper removal performance. Effective application of MEUF operation for surfactant recovery and the performance of extensive sensitivity analysis. The overall value of the technology is significantly enhanced if it can be demonstrated to be effective under various subsurface conditions. The demonstration of elevated contaminant recovery and a high percentage of surfactant recovery in this low yield aquifer is an important step in demonstrating "broad" application potential. Also, key in the future application of this technology is the effective demonstration of surfactant-contaminant separation and surfactant recovery for re-use. These aspects of the technology were also demonstrated to be viable for the conditions present at this site. Tables, Figures and Appendices available but not shown in this project summary: Table 1 - Surfactant Recovery Results Table 2 - Baseline Contaminant Removal Table 3 - Stripper Performance at 0.5 wt% Dowfax Table 4 - Hollow Fiber Performance Operating in Parallel Table 5 - Stripper Removal Efficiencies for TPH Operating at Elevated Air to Water Ratios Table 6 - MEUF at 43-44 psi Back Pressure Table 7 - MEUF at 51-54 psi Back Pressure Table 8 - Tray Stripper Removal Efficiency Figure 1 - Schematic of Surfactant Enhanced Remediation Figure 2 - Well Location Diagram Appendix A - Bench Scale Results Appendix B - Well Logs Appendix C - Laboratory Analysis and Test Results Appendix D - Site Map and Photographs Report(s)/Publication(s) (Additional Information Sources): Draft report from Surbec Environmental Services, Norman, OK, phone (405) 364-9726. Ground-Water Remediation Technologies Analysis Center Operated by Concurrent Technologies Corporation Appendix - Page 150 of 164 Copyright GWRTAC 1998 Revision 1 Tuesday, November 17, 1998
In Situ Flushing Project Summaries GWRTAC Case Study Database GWRTAC ID: FLSH0075 Project Name: U.S. DOE Paducah Gaseous Diffusion Plant City: Paducah State/Province: KY Primary GWRTAC Personal Communication Source (Name/Organization): Project Summary: Mark Hasegawa Report(s)/Publication(s) (GWRTAC Source): None Surbec Environmental Services The following text was excerpted from marketing information provided by Surbec Environmental, Norman, Oklahoma, in October 1998: The primary purpose of this project is to utilize bench scale testing to screen surfactant systems for remediation application at the subject site. The treatability study will focus on three primary systems: 1) the best surfactant solubilization system, 2) the best surfactant/cosolvent solubilization system and 3) the best mobilization system in which vertical migration can be mitigated. One potential method of mitigating vertical migration is to develop a mobilization system with an ultra high solubilization potential so that any mobilized DNAPL is solubilized into solution before significant vertical migration can occur. Conceptual and pilot scale design of the surfactant injection and recovery system included predesign analysis, Modflow analysis, surfactant selection and optimization, surfactant recovery design, and fate transport analysis. Over 50 surfactants will be screened for evaluation under the treatability study. Included in the testing will be two dimensional sand tank studies to evaluate vertical migration potential. The estimate for project completion is December 1998. Report(s)/Publication(s) (Additional Information Sources): None Ground-Water Remediation Technologies Analysis Center Operated by Concurrent Technologies Corporation Appendix - Page 151 of 164 Copyright GWRTAC 1998 Revision 1 Tuesday, November 17, 1998
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Technology Status Report Technology
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ABSTRACT This technology status rep
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LIST OF TABLES Table Title Page 1 I
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1.0 INTRODUCTION / PURPOSE OF STATU
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a laboratory-scale project. As illu
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3.1 Flushing Solutions 3.0 ANALYSIS
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(approximately eight) full-scale pr
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Table 1. In Situ Flushing - Summary
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Table 3 In Situ Flushing - Geology
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Table 4 In Situ Flushing - Recovere
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Full-Scale/Commercial 26% Figure 2.
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Site Remediation 25% Figure 4. In S
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NAPL Removal 34% Figure 6. In Situ
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Figure 8. In Situ Flushing - Distri
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Number of Projects 35 30 25 20 15 1
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Number of Case Studies 45 40 35 30
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25 ft and 50 ft and 10 ft and 100 f
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Unconfined Aquifer 65% Figure 16. I
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In Situ Flushing Project Summaries
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Technology Status Report: In Situ Flushing - CLU-IN

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