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PROJECT UPDATE :
X-701B Oxidant Treatment
The X-701B
Solid Waste Management Unit (SWMU) is being
remediated under Resource Conservation and
Recovery Act (RCRA) Corrective Actions in
accordance with an Ohio Environmental Protection
Agency (OEPA) Decision Document
issued in December 2003. It is the last
major cleanup action to be completed prior to plant
decontamination and decommission.
The
selected remedy for groundwater
within the
Decision Document is chemical oxidation
treatment in the
western portion of the plume where a source area
is believed to exist. The principal contaminant
of concern is trichloroethene (TCE), an
industrial solvent, which has a
preliminary remediation goal (PRG) equal to the
drinking water standard (5 ug/L). The remedy
will continue until PRGs are attained throughout
the plume or sooner if Ohio EPA determines that
the remedy is no longer effective in removing
contaminant mass.
(See illustration 2) Until then, the United States
Department of Energy (DOE) will continue to
operate two groundwater treatment facilities and the groundwater collection trench near
Little Beaver Creek.
Mobile
equipment is used to inject oxidant at
various locations of the X-701B groundwater
plume area.
DOE has
selected the oxidant Modified
Fenton's Reagent
for the remedy, a stabilized hydrogen peroxide
and a proprietary catalyst solution
which is
injected into a series of locations across the
contamination area. The treated area is then
monitored to determine the effectiveness of the
treatment, and follow-up injections are
conducted as needed.
Remediation was
initiated during September 2005 and is likely to
continue for approximately four years.
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