A case study in which monitored natural attenuation (MNA) of petroleum hydrocarbons was assessed at a former tank farm site in Whitehorse, Yukon. The goal was to evaluate whether MNA could provide a viable strategy as part of the overall site restoration plan. The evaluation included a plume stability assessment and geochemical trend analysis to determine if the petroleum hydrocarbon plume was shrinking, stable or expanding, and if natural attenuation processes were sufficient to control the plume over many years. The results are quite surprising!
Guy Patrick is a contaminant hydrogeologist and environmental engineer with over 30 years of experience in the assessment and remediation of contaminated sites in soil, sediment and bedrock environments. As Managing Director of Patrick Consulting Inc., a founding member of GeoEnviroPro, and a Contaminated Sites Approved Professional in the Province of British Columbia, Mr. Patrick’s expertise includes strong technical review and project oversight, with a focus on the development of innovative approaches in the assessment and clean-up of contaminated sites. As a senior technical specialist, he provides leadership in the investigation and remediation of sites contaminated by inorganic and organic chemical solids and liquids, including dense non-aqueous phase liquids (DNAPL) such as coal tars, chlorinated solvents and mercury. His work experience includes technical review and litigation support on a number of projects in Canada and the US. In addition to consulting, Guy is an Adjunct Professor at UBC, where he has co-taught course in environmental engineering and contaminant hydrogeology.