Thomas Plante Thomas Plante is a Senior Remediation Engineer with Haley & Aldrich located in Portland, Maine. As a consulting engineer, he has worked on remediation of contaminated sites for over 20 years, and has performed treatability evaluations, design, permitting, peer review, and construction management of in-situ solidification projects since 2000. He has worked for a number of utility clients and the Electric Power Research Institute (EPRI) investigating and remediating coal tar impacts from former manufactured gas plants and has prepared several technical research reports for EPRI on solidification/stabilization of coal tar sites, coal tar mobility, and containment barriers, among other topics. His solidification experience ranges from solidification of flyash ponds, to non-aqueous phase liquid containment, to mixed waste sites involving organics and inorganics, to complex solidification projects involving source and groundwater remedies, hydraulic and geochemical models and the use of additives for organic compound attenuation. Thomas routinely presents at technical conferences on solidification topics and has been an active member of the ITRC Solidification/Stabilization Team since 2009. Thomas earned a bachelor’s degree in civil engineering from the University of New Hampshire in Durham, New Hampshire in 1987, and a master’s degree in environmental engineering from the University of Massachusetts in Amherst, Massachusetts in 1990. Thomas is licensed as a Professional Engineer in Maine, New Hampshire, and Rhode Island.