SYMPOSIA PAPER Published: 01 January 1995

In Situ Bioremediation Pilot Study at a Former Manufactured Gas Plant Site


A one-year in situ bioremediation pilot study was implemented in January 1992 at a site contaminated with polynuclear aromatic hydrocarbons, benzene, ethyl benzene, toluene, and xylenes from former manufactured gas plant operations. The objective of the study was to evaluate the effectiveness of in situ bioremediation on high molecular weight hydrocarbons under site conditions.

The pilot study involved injecting treated groundwater amended with nutrients and oxygen (in the form of hydrogen peroxide) into the subsurface via an injection well, extracting groundwater through a downgradient extraction well, and periodically monitoring the system using monitoring wells and soil borings.

Results indicate that the site hydrogeology, the high concentrations of target and non-target organics, and the presence of pure-phase coal tar in the subsurface limit the cost-effective application of in situ bioremediation at this site.

Author Information

English, DA
B&V Waste Science and Technology Corp., Kansas City, MO
Nelson, JR
B&V Waste Science and Technology Corp., Kansas City, MO
Hargens, DA
IES Industries Inc., Cedar Rapids, IA
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Developed by Committee: F20
Pages: 91–113
DOI: 10.1520/STP13030S
ISBN-EB: 978-0-8031-5299-1
ISBN-13: 978-0-8031-1891-1