Instructor: Grant Carey (Porewater Solutions)

Deciding how much effort to commit to DNAPL source treatment is challenging because of uncertainty in the prediction of remediation timeframe and efficiency. This course will describe methods and analytical tools for quantifying cost, benefits, and risk reduction associated with DNAPL remediation.  Methods presented in this course include quantification of: remedial goals for source strength reduction; source mass depletion required to achieve remedial goals; remediation timeframe estimates; prediction of the source strength reduction expected for various in situ technologies; and lifecycle costs and sustainability metrics. 

After this seminar, participants will be able to:

• List site features to be characterized when conducting a DNAPL remediation cost-risk-benefit analysis;
• Describe how the ganglia-to-pool ratio (GTP), source age, heterogeneity, and back diffusion may influence remedial efficiency and remediation timeframe;
• Calculate the remedial action objective for source strength reduction at a site, and estimate the range of source mass depletion required to accomplish this goal;
• Use the NAPL dissolution model provided with course exercises to predict the remediation timeframe for natural gradient dissolution and active remediation for specific technologies; and
• evaluate the quantitative and qualitative benefits associated with site-specific DNAPL remediation and discuss key areas of uncertainty involved with this type of analysis

This course will be of interest to consultants, environmental managers, regulators, and other stakeholders engaged in making decisions on the remediation of DNAPL source zones.

About the Instructor

Grant Carey is an expert environmental engineer specializing in DNAPL characterization and remediation, environmental forensics, and mathematical modeling.  Grant has worked on hundreds of projects across North America over the past twenty years.  Grant has a Bachelors of Applied Science degree from Waterloo University, and a Masters degree in Civil Engineering from Carleton University (Ottawa, Ontario).  Grant is currently completing his Ph.D. at the University of Guelph with a research focus on DNAPL source remediation, including the prediction of remediation timeframe and the validation of decision-making tools that support risk-cost-benefit analyses. 

Grant has developed industry-leading software used for modeling and visualization of biogeochemical reactions in groundwater, including BioRedox-MT3DMS, and the Remediation ToolKit which includes SEQUENCE, BioTrends, and BioTracker.  Grant has published over 60 technical papers and courses related to site remediation and groundwater modeling.  Grant is currently participating on the ITRC Integrated DNAPL Source Strategy Team, and previously participated on the ITRC Enhanced Attenuation of Chlorinated Organics (EACO) Team.