In this webinar we are pleased to have as a special guest speaker Matt Burns, Technical Fellow and the U.S. Contaminated Land National Service Line Director for WSP. In this webinar he will discuss project case studies where in situ remediation was chosen as an alternative compared to conventional liability management strategies due to significant cost-savings. Matt Burns will be joined by Maureen Dooley, Director of Strategic Projects at REGENESIS. Actionable molecular biological tools (MBT) data collection strategies and life-cycle cost comparisons between conventional and in situ technologies will be presented for 2 sites.

Date: Thursday, May 30th, 2019
Time: 11am pacific / 2pm eastern

The sites that will be discussed include:

  • A site with a large, oxic, dilute TCE plume with no apparent degradation products present. At this site, both cometabolic oxidation and abiotic reduction were assessed using qPCR, CSIA and magnetic susceptibility. Additionally, carbon-14 TCE assays were performed ex situ to quantify degradation rates along both pathways. Resultant degradation rate data was used to construct a four-dimensional reactive fate and transport model.
  • A large chlorinated VOC plume in fractured sandstone where back diffusion is a confounding factor. At this site, a PlumeStop® plus bioremediation combined remedy pilot test was assessed using aquifer matrix in situ microcosms, deployed before amendment application, combined with qPCR and CSIA. The microcosm construct overcomes the sample collection constraints associated with analyte partitioning from the aqueous phase and allowed for the direct assessment of degradation occurring on the PlumeStop® activated carbon particle.

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