– The Evolution of the Contaminated Site Remediation Industry in Canada

Our industry has experienced a steady evolution since the “dig and dump” days with advances in science, technology, regulation and societal trends (like sustainability). The early approach of soil excavation exclusively for metals has evolved, as remedial designs now consider hundreds of contaminants in soil, groundwater and vapours at concentrations as low as in the parts per trillion range. Additionally, our greater understanding of the subsurface has resulted in the need to consider complex processes such as vapour intrusion and diffusion-controlled migration.

With over 30 years of experience in environmental consulting and remediation contracting, the author will provide several insights on the issue, by discussing advances in the characterization of site conditions, better engineered remedial amendments (including activated carbon-based), application technologies, and the use of interim data collection to assist in optimizing remedial programs.

Reviewing the past provides environmental practitioners and stakeholders a more thorough understanding of the state of remediation in Canada, what is possible, what is not, and what the future of our essential sector may hold.