The site consists of a thin veneer of glacial till overlying a soft, fractured metamorphosed, sedimentary sequence.
Targeted Environmental Media:
 Fractured Bedrock
This was a pilot test and the contaminated zone has not been completely delineated.
Major Contaminants and Maximum Concentrations:
- Tetrachloroethene (0 µg/L)
- Trichloroethene (0 µg/L)
- Borehole Geophysics
- Natural Gamma
- Caliper
- Acoustic Televiewer
- Fluid Loggings
- Temperature
- Conductivity/Resistivity
- Flow
- Surface Seismic Surveys
- Vertical Chemical Profiling
- Pumping Tests
- Fracture Trace Analysis
- GPR Surveys
- Chemical Oxidation (In Situ)
Comments:
Injection of permanganate into a fractured bedrock aquifer using both pressure and passive injection techniques resulted in a radius of influence of 70 to 100 ft. Evidence of permanganate persistence and migration suggest minimal reaction between the oxident and bedrock. Evaluation of VOC concentration data suggest that the permanganate applications displaced ground water present in fractures immediately following the injections. Upon re-equilibration, VOC concentrations typically remained 85 -90% below pre-injection levels. VOC concentrations also decreased significantly in downgradient wells, suggesting the potential for source area abatement to significantly effect concentrations in the associated plume.
These were pilot tests
Post application monitoring has been conducted for up to two years.
Persistence of permangnnate generally one year in each area.
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