In case you missed our last installment of “Inside In Situ Thermal Remediation”, TerraTherm’s new informational webinar series, you can find a recorded version here:
This webinar, entitled “Three Logical Steps of Thermal Treatment: Lessons Learned from Treatability Studies, Pilot Study, and Full Scale Implementation,” took place on Tuesday, March 4, 2014. This installment was presented by TerraTherm’s co-founder, President and CEO, John Bierschenk, as well as the Manager of Remediation at IBM Corporation, Michael J. Kominek.
By watching this recording, you will learn about a site-specific case study demonstrating how TerraTherm successfully treated a former dry cleaner site for IBM in New York state.
In this case Tetrachloroethene (PCE) and No. 2 Fuel Oil were found in soils and groundwater. Several distinct geologic layers exist at the site including a shallow cinder fill material with a high fraction of organic carbon, a Light Non-Aqueous Phase Liquid (LNAPL) smear zone at the water table containing Diesel Range Organics (DRO) from an upgradient fuel oil release, and a PCE impacted clay confining layer.
The remedial objective was to remove PCE from subsurface soil to the point where no single post-treatment sample exceeded 5.5 mg/kg and the average PCE concentration in all samples was less than or equal to 0.56 mg/kg. A laboratory treatability study was performed using soil samples collected from each of the soil layers at the site to evaluate the feasibility of reaching the remedial objective with thermal treatment. Following the treatability study, TerraTherm designed and conducted an In Situ Thermal Desorption (ISTD) pilot test, after which we carried out a full-scale thermal treatment using ISTD. Monitored Natural Attenuation (MNA) of the dissolved plume followed ISTD, enabling a pump-and-treat system that had operated at the site for many years to be decommissioned.
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