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The SPH technology is a thermally enhanced soil
vacuum extraction technique that works by imparting conventional electric
power into the subsurface soils and groundwater though a series of
strategically designed electrodes. The resistance of the subsurface
formation causes it to heat-up, and if sufficient power is input, the
interstitial pore water in the soils as well as the groundwater are heated
to the boiling point. At boiling temperatures, the contaminants are
volatized and their viscosity is dramatically reduced which allows for
effective recovery via in-situ vacuum extraction system (SVE). SPH is
extremely fast. For example, at typical EPA Superfund Sites containing
chlorinated hydrocarbons where conventional remediation often requires at
least 10 years of treatment, SPH can accomplish even more stringent
treatment requirements in a matter of months. From a cost perspective,
SPH is very competitive, and even with electrical costs included, the cost
per volume of media treated is often lower than conventional methods of
subsurface remediation.
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