Terra-KleenŠ
Description
Terra-KleenŠ
is a soil
washing
system that removes semi-volatile organic compounds (SVOCs) from soil. It was developed
primarily to remove polychlorinated biphenyls (PCBs). The Terra-KleenŠ system
uses a solvent in a closed-loop
process to remove PCBs from soils. PCB-laden solvent is purified and re-used.
The PCB-contaminated purification media is transported off site for disposal at
a permitted facility. This process results in a dramatic decrease in the volume
and mass of material transported off site.
Limitations
and Concerns
There
is not enough information about residual levels of PCB after treatment. If
levels are too high, then treated soil may have to be disposed of.
This
process does not eliminate the need to dispose of the PCBs; it only
concentrates it.
Soils
containing greater than 15 percent clay are difficult to treat because
contaminants sorb to the clay.
Soils
with high moisture content must be dewatered. There is a concern that some
contaminants may be carried in the water and escape treatment.
Applicability
Terra-KleenŠ
is process that removes PCBs, pesticides and other SVOCs from soil.
Technology
Development Status
The
U.S. Environmental Protection Agency (EPA) has approved
Terra-KleenŠ for removing PCBs and some other compounds from soil. Although the manufacturer states that
it is equally efficient at removing dioxin, this has not been tested by EPA.
Web
Links
http://www.p2pays.org/ref/21/20822.pdf
http://www.clu-in.org/download/contaminantfocus/pcb/Terra-Clean-540r94521.pdf
Other
resources
None
have been identified.