Liquid Atomized KMnO4 Injection Successful in Oklahoma
 In
2003 ARS completed a pilot test by performing
Pneumatic Fracturing/Atomized
KMn04 injection into three boreholes at a
DOD facility in Oklahoma. The complex
site geology consisted of weathered siltstone
and poorly sorted sandstone. During this project
3,530 gallons of KMn04, at a concentration
of approximately 5% by weight was injected
into the target source zone. Prior to the
chemical oxidant injection, pressures up to
450 psig were required to first initiate fractures
within the formation. Upon completion of the
fracturing step, liquid atomized injection
(LAI) of the KMn04 was performed. During the
injection events, evidence of chemical emplacement
was observed radially outward to 90 ft. Within
one month after the injections were completed,
greater than 80% reduction of TCE was
observed in ground water. More importantly,
little to no contaminant rebound has been
observed within the pilot test area. A limited
amount of rebound was observed along the up-gradient
fringe areas of the pilot test area, presumably
due to the influx of some contaminated groundwater.
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