Technology Status Report: In Situ Flushing - CLU-IN
Technology Status Report: In Situ Flushing - CLU-IN
Technology Status Report: In Situ Flushing - CLU-IN
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<strong>In</strong> <strong>Situ</strong> <strong>Flushing</strong> Project Summaries<br />
GWRTAC Case Study Database<br />
GWRTAC ID: FLSH0031<br />
Project Name: Ninth Avenue Dump, Gary, <strong>IN</strong><br />
City: Gary State/Province: <strong>IN</strong><br />
Primary GWRTAC Personal<br />
Communication Source<br />
(Name/Organization):<br />
Project Summary:<br />
Bernie Schorle<br />
U.S. EPA<br />
<strong>Report</strong>(s)/Publication(s) (GWRTAC Source):<br />
U.S. Environmental Protection Agency, 1991: Engineering Bulletin <strong>In</strong> <strong>Situ</strong> Soil <strong>Flushing</strong>,<br />
EPA/540/2-91/021, U.S. EPA Office of Emergency and Remedial Response (OERR), Washington,<br />
DC 20460, Office of Research and Development (ORD), Cincinnati, Ohio 45268, 8 pp., October<br />
1991.<br />
The following text is from notes from a July 1998 conversation with the EPA RPM:<br />
Groundwater was extracted about 10 to 15 feet below the water table. Extracted fluids were<br />
treated above ground (with oil/water separation for collection of LNAPL, physical/chemical<br />
treatment for iron precipitation, and a sequencing batch bioreactor). The treated groundwater reinjected<br />
through perforated pipes on top of the ground; the pipes were covered with soil. A slurry<br />
wall surrounds the site, and the flushing operation was conducted within the slurry wall. The slurry<br />
wall is keyed into a confining layer present at 28 to 30 feet below the ground surface. The NPDES<br />
permit allowed for discharge of surface water from on-site ponds, not treated groundwater. It is<br />
possible, however that groundwater may have entered ponds.<br />
Chemical oxygen demand (COD) was reduced by 10-20% and attributed to the flushing operation.<br />
<strong>Report</strong>(s)/Publication(s) (Additional <strong>In</strong>formation Sources):<br />
U.S. Environmental Protection Agency, 1991: Engineering Bulletin <strong>In</strong> <strong>Situ</strong> Soil <strong>Flushing</strong>,<br />
EPA/540/2-91/021, U.S. EPA Office of Emergency and Remedial Response (OERR), Washington,<br />
DC 20460, Office of Research and Development (ORD), Cincinnati, Ohio 45268, 8 pp., October<br />
1991.<br />
Ground-Water Remediation Technologies Analysis Center<br />
Operated by Concurrent Technologies Corporation<br />
Appendix - Page 67 of 164<br />
Copyright GWRTAC 1998<br />
Revision 1<br />
Tuesday, November 17, 1998
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