Technology Status Report: In Situ Flushing - CLU-IN

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In Situ Flushing Project Summaries GWRTAC Case Study Database GWRTAC ID: FLSH0067 Project Name: Petroleum Company (Bulk Plant) City: State/Province: QC Primary GWRTAC Personal Communication Source (Name/Organization): Project Summary: Charles Boulanger GSI Environnement Report(s)/Publication(s) (GWRTAC Source): GSI Environnement (formerly Ecosite, Inc.), 965 Newton Ave., Office 270, Québec City, Qc. Canada G1P 4M4, Marketing Information The following text was excerpted from marketing information provided by GSI Environnement (formerly Ecosite, Inc.), 965 Newton Ave., Office 270, Québec City, Qc. Canada G1P 4M4 in August 1998: The contaminants at the site consisted of gasoline (BTEX) and diesel (MOG) at 15,000 ppm. The 9,000 m3 (approx. 11,800 yd3) contaminated zone extended from 2 to 6 m (6.6 to 19.7) below the ground surface, and was comprised of sand with boulders. This former bulk petroleum plant is located less than 300 feet from the St. Lawrence River, and the water table is tidally influenced. The containment of the surfactant and contaminants was thus a concern during project implementaiton. The Injecsol TM hydrodynamic process creates hydraulic barriers that keep all contaminants and surfactants in the contaminated area. After a treatability study, specific surfactant solutions were developed for a highly efficient treatment. Injecsol TM enhanced in situ flushing was used to reduce the concentration of Mineral Oil and Grease of the contaminated matrix. BTEX were extracted by pumping groundwater and air simultaneously. The mobile water treatment unit, consisting of coalescent separators, dissolved air flotation units, sand filters, and activated carbon filters separated the water from the surfactants and contaminants at a rate of 400 liters per minute (approx. 106 gpm) and enabled the expeditious results. All work was performed taking tidal fluctuations into consideration and leaving existing railroad tracks in place. Contaminants were remediated to levels as low as 1017 ppm MOG, 0.67 ppm (benzene), 0.99 ppm (toluene) and 2.53 ppm (xylene). The project duration was 4 months, and the project cost was +/- $300,000. (Canadian). Report(s)/Publication(s) (Additional Information Sources): None Ground-Water Remediation Technologies Analysis Center Operated by Concurrent Technologies Corporation Appendix - Page 134 of 164 Copyright GWRTAC 1998 Revision 1 Tuesday, November 17, 1998
In Situ Flushing Project Summaries GWRTAC Case Study Database GWRTAC ID: FLSH0068 Project Name: Petroleum Company (Residential Site Contamination) City: State/Province: QC Primary GWRTAC Personal Communication Source (Name/Organization): Project Summary: Charles Boulanger GSI Environnement Report(s)/Publication(s) (GWRTAC Source): GSI Environnement (formerly Ecosite, Inc.), 965 Newton Ave., Office 270, Québec City, Qc. Canada G1P 4M4, Marketing Information The following text was excerpted from marketing information provided by GSI Environnement (formerly Ecosite, Inc.), 965 Newton Ave., Office 270, Québec City, Qc. Canada G1P 4M4 in August 1998: A residential property including several houses and utilities was located next to a former petroleum plant, and contaminated beneath houses with gasoling (BTEX) and diesel (MOG). Contaminants were present at concentrations of 10,500 ppm (MOG), 50 ppm (benzene), and 45 ppm (toluene). The 1,000 m3 (approx. 1,300 yd3) contaminated zone extended from 1,0 to 2.6 m (3.3 to 8.5 ft) below ground surface (bgs), and was comprised of organic soil (peat moss). Due to high levels of soil contamination remaining at the adjacent plant, hydraulic barriers to stop the migration of the contaminants to the residential area were provided. Installation of a vertical cutoff wall, using synthetic liners and leachate drainage network, was also necessary to recover free phase present. Several technologies were combined to lower caontamination to residential levels. While proceeding with vacuum extraction and biosparging, Injecsol TM as used to recover the free phase and for in situ flushing of the contaminated soil beneath the houses. A surfactant was developed from a laboratory treatability study to allow highly efficient treatment. Work was completed leaving all existing infrastructures in place and ensuring long term safety for the residents. Contamination was lowered to concentrations of 1,000 ppm (MOG) over a 12 month project duration, at a cost of +/- $300,000. (Canadian). Report(s)/Publication(s) (Additional Information Sources): None Ground-Water Remediation Technologies Analysis Center Operated by Concurrent Technologies Corporation Appendix - Page 135 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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