The Geo-Cleanse® Process has been applied to a wide variety of both geological site conditions (clay, silt, sand and fractured bedrock) and chemical compounds (aromatic, aliphatic, and chlorinated). As of January 2006 GCI has applied the technology to over 100 sites both as bench, pilot, and full-scale remediations.
GCI must consider many factors in determining the applicability of the Geo-Cleanse® Process for individual sites. The nature and mass of contaminant, geological matrix, and site subsurface considerations in addition to remedial costs are important considerations in evaluating site acceptability. In general, a site is considered applicable if the treatment will be efficient, cost-effective and safe at the specific site.
A site is considered applicable if:
a. The contaminant exists as LNAPL or DNAPL or dissolved phase of groundwater; and
b. The hydraulic conductivity is greater than 10 -6 cm/sec; and
c. The depth to groundwater is greater than 5 feet below grade (may be shallower if man-made cap present); and
Generally, a site is NOT considered applicable if:
a. The contaminant is sorbed to a "meadow mat" or a fill area with high organic carbon content below the normal topsoil region (i.e. below 3 feet).
b. There is free phase or concentrated residual (i.e. greater than 10,000 ppm) in the bedding material or within a sensitive structure (i.e. tank farm, building footings, ets.) in the treatment region.
c. The pH of groundwater is greater than 8.0 (this implies an alkaline environment which is not conducive to Fenton oxidation reaction)
d. The concentration and accessibility of the contaminant in a soil is more cost effectively remediated via traditional methodologies.
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