Technology Status Report: In Situ Flushing - CLU-IN

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In Situ Flushing Project Summaries GWRTAC Case Study Database barrier and perforated culvert and recovered by a pumping system and oil/water separator. In the future at this site, soil excavation will be completed south of the interstate highway which bisects the site. At that time, a system for in situ flushing will be constructed in a similar manner to that currently operatiing on the north side of the interstate. Performance data for the in situ flushing system is not yet available. Report(s)/Publication(s) (Additional Information Sources): U.S. EPA, Nov. 1996: Innovative Treatment Technologies: Annual Status Report (Eighth Edition), EPA 542-R-96-010, Number 8, U.S. EPA OSWER (5102G) TIO, Washington, DC Internet URL http://www.epa.gov.superfund.htm Ground-Water Remediation Technologies Analysis Center Operated by Concurrent Technologies Corporation Appendix - Page 66 of 164 Copyright GWRTAC 1998 Revision 1 Tuesday, November 17, 1998
In Situ Flushing Project Summaries GWRTAC Case Study Database GWRTAC ID: FLSH0031 Project Name: Ninth Avenue Dump, Gary, IN City: Gary State/Province: IN Primary GWRTAC Personal Communication Source (Name/Organization): Project Summary: Bernie Schorle U.S. EPA Report(s)/Publication(s) (GWRTAC Source): U.S. Environmental Protection Agency, 1991: Engineering Bulletin In Situ Soil Flushing, EPA/540/2-91/021, U.S. EPA Office of Emergency and Remedial Response (OERR), Washington, DC 20460, Office of Research and Development (ORD), Cincinnati, Ohio 45268, 8 pp., October 1991. The following text is from notes from a July 1998 conversation with the EPA RPM: Groundwater was extracted about 10 to 15 feet below the water table. Extracted fluids were treated above ground (with oil/water separation for collection of LNAPL, physical/chemical treatment for iron precipitation, and a sequencing batch bioreactor). The treated groundwater reinjected through perforated pipes on top of the ground; the pipes were covered with soil. A slurry wall surrounds the site, and the flushing operation was conducted within the slurry wall. The slurry wall is keyed into a confining layer present at 28 to 30 feet below the ground surface. The NPDES permit allowed for discharge of surface water from on-site ponds, not treated groundwater. It is possible, however that groundwater may have entered ponds. Chemical oxygen demand (COD) was reduced by 10-20% and attributed to the flushing operation. Report(s)/Publication(s) (Additional Information Sources): U.S. Environmental Protection Agency, 1991: Engineering Bulletin In Situ Soil Flushing, EPA/540/2-91/021, U.S. EPA Office of Emergency and Remedial Response (OERR), Washington, DC 20460, Office of Research and Development (ORD), Cincinnati, Ohio 45268, 8 pp., October 1991. Ground-Water Remediation Technologies Analysis Center Operated by Concurrent Technologies Corporation Appendix - Page 67 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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