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Item Information   Holdings       More by this author     Fafalios, Spiros L.     Subjects     Coal-tar products     Site remediation     Extraction (Chemistry)     Gas manufacture and works     MSEV Project.     Browse Catalog     by author:      Fafalios, Spiros L.       by title:      The application of s...         MARC Display

The application of steam-enhanced extraction for in situ remediation of coal tar residues at a former manufactured gas plant site / by Spiros L. Fafalios. by Fafalios, Spiros L. Subjects Coal-tar products   Site remediation   Extraction (Chemistry)   Gas manufacture and works   MSEV Project. Description:  66 leaves : ill., charts, plans ; 28 cm. Contents:  Advisor: Paul Boersma Committee members: Daniel Plomb, Kenneth Kaszubowski Preface -- Problem definition -- Literature review of in situ treatment technologies -- Identification of primary strategy -- Site description -- Treatment goals -- Design basis -- Detailed design -- Monitoring plan -- Cost comparison --Glossary -- Design project approval form. From the early 19th century to the mid 20th century, manufactured gas plants (MPGs) generated coal tar as a by-product of manufactured gas. Often, when these sites were abandoned, coal tar remained in the structures, including the tar separator, tar wells, and gas holders. Such areas are often targeted for source removal actions, because over the decades during operation and since decommissioning, the coal tar has in many cases migrated from its original locations to deeper and more widespread areas of contamination, while maintaining its properties as a dense non-aqueous phase liquid. Remedial actions at MGP sites typically focus on ex situ remediation of coal tar residues in soil and groundwater. Unconventional in situ treatment is also coming into use, because of the long time frame required for conventional pump-and-treat or open-ended containment options for groundwater currently in use. In one documented study, a vapor extraction system is uses as an intermediate treatment step to reduce the fraction of benzene in the coal tar contained within a gas holder to reduce ignitability. In situ flushing of coal tar residuals has also been demonstrated as a viable approach to in situ remediation of coal tars in soil and groundwater. Finally, although not currently applied at coal tar sites, in situ steam injection, a more aggressive variation of air sparging has been successfully used at other types of contamination sites, such as petroleum contamination at underground storage tank sites. The following design project summarizes the design of a steam-enhanced extraction system for removal of coal tar and dissolved contaminant residuals at a notional MGP site in order to reduce contaminant mass and mobility.   Copy/Holding information Location Collection Call No. Status   Walter Schroeder Library Master's Theses AC805 .F34 1998 Available Add Copy to MyList Format: HTMLPlain textDelimited Subject:   Email to:

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