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ASTM Selected Technical Papers
Stabilization and Solidification of Hazardous, Radioactive, and Mixed Wastes: 3rd Volume
By
TM Gilliam
TM Gilliam
Editor
Search for other works by this author on:
CC Wiles
CC Wiles
Editor
Search for other works by this author on:
ISBN-10:
0-8031-2020-6
ISBN:
978-0-8031-2020-4
No. of Pages:
734
Publisher:
ASTM International
Publication date:
1996

Coal tar contamination was encountered at a former coal gasification site in soils below the groundwater table, and in the sediments of the adjacent river. Ex situ remediation techniques at this site would be costly because of the need to dewater the impacted media. In situ solidification/stabilization was tested to evaluate its effectiveness. Treatability testing was performed to evaluate a Portland cement/fly ash binder system with added stabilizing agents. Results were sufficiently promising to warrant pilot testing.

Grout containing Portland cement, fly ash, organically modified clay, and granular activated carbon was pilot tested at the site. Test specimens were collected and tested to evaluate durability, compressive strength, and permeability. The samples were extracted by several methods and analyzed to measure the leachable concentrations of organic compounds and metals. Results indicated acceptable physical characteristics. Leachable concentrations of most polynuclear aromatic compounds were decreased.

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,” SW-846,
U.S. Environmental Protection Agency
,
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, Revised July, 1992.
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