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Roy F. Weston, Inc. and IEG Technologies Corporation
Unterdruck-Verdampfer-Brunnen (UVB) Technology
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Roy F. Weston, Inc. and IEG Technologies Corporation
Unterdruck-Verdampfer-Brunnen (UVB) Technology (Main Text)(1.45Mb)
Roy F. Weston, Inc. and IEG Technologies Corporation
Unterdruck-Verdampfer-Brunnen (UVB) Technology (Appendix) (1.53Mb)
Abstract
This report summarizes the findings of an evaluation of the Unterdruck-Verdampfer-Brunnen
(UVB) technology developed by IEG Technologies Corporation (IEG) and demonstrated
in association with Roy F. Weston, Inc. This evaluation was conducted under
the U.S. Environmental Protection Agency (EPA) Superfund Innovative Technology
Evaluation (SITE) program. The UVB treatment technology was demonstrated over
a period of 12 months from April 1993 to May 1994 at March Air Force Base (AFB)
in Riverside, California. This Innovative Technology Evaluation Report provides
information from the SITE demonstration of the UVB technology that is useful
for remedial managers, environmental consultants, and other potential technology
users in implementing the technology at Superfund and Resource Conservation
and Recovery Act (RCRA) hazardous waste sites. The SITE demonstration for the
UVB technology was designed with three primary and seven secondary objectives
to provide potential users of the technology with the information necessary
to assess the applicability of the UVB system at other contaminated sites. The
demonstration program objectives were achieved through the collection of groundwater
and soil gas samples, as well as UVB system process air stream samples over
a 12-month period. To meet the objectives, data were collected in three phases:
baseline sampling, long-term sampling, and dye trace sampling. Baseline and
long-term sampling included the collection of groundwater samples from eight
monitoring wells, a soil gas sample from the soil vapor monitoring well, and
air samples from the three UVB process air streams both before UVB system startup
and monthly thereafter. In addition, a dye trace study was implemented to evaluate
the system’s radius of circulation cell. This study included the introduction
of fluorescent dye into the groundwater and the subsequent monitoring of 13
groundwater wells for the presence of dye three times a week over a 4-month
period. The technology was analyzed to identify its advantages, disadvantages,
and limitations. The UVB technology was evaluated based on the nine criteria
used for decision making in the Superfund feasibility study process. The overall
effectiveness of the system depends upon the time available for mass exchange
between dissolved and vapor phase, the concentration gradient, the temperature
of the operating system, the interface area of the bubble (bubble size), and
the contaminant gas-liquid partitioning (mass transfer coefficient). The technology
employs readily available equipment and materials. Material handling require-ments
and site support requirements are minimal. The technology as presented at the
SITE demonstration is limited to treatment of VOCs in the saturated zone and
capillary fringe.
Back to SITE Home Page
Posted November 23, 1999
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