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Integrated DNAPL Site Strategy Workshop

02 October 2014 08:30 AM - 02 October 2014 12:30 PM
Events, Past training

Workshop overview

Sites contaminated by chlorinated solvents present a daunting environmental challenge. Chlorinated solvents are prevalent and persistent groundwater contaminants, found at tens of thousands of sites worldwide.  They also are among the most difficult groundwater contaminants to remediate, especially at sites with dense non-aqueous phase liquid (DNAPL). Restoring sites contaminated by chlorinated solvents to typical regulatory criteria (low parts-per-billion concentrations) within a generation has proven exceptionally difficult. 

Site managers must recognize that complete restoration of many of these sites will require prolonged treatment and involve several remediation technologies. To make as much progress as possible within a generation requires a thorough understanding of the site, clear descriptions of achievable objectives, and use of more than one remedial technology. Making efficient progress will require an adaptive management strategy, and may also require transitioning from one remedy to another as the optimum range of a technique is passed.  Targeted monitoring should be used and re-evaluation should be done periodically.  

In this ½ day workshop, the fundamentals behind such an Integrated DNAPL Site Strategy (IDSS) will be discussed according to these five key concepts:

  1. Conceptual site model (CSM) that is based on reliable characterization methods and an understanding of the subsurface conditions that control contaminant transport, reactivity and distribution;
  2. Remedial objectives and performance metrics that are clear, concise, and measureable;
  3. Treatment technologies applied in sequence or in parallel designed to optimize performance and take advantage of potential synergistic effects;
  4. Monitoring strategies based on interim and final clean-up objectives, the selected treatment technology and approach, and remedial performance goals. 
  5. Re-evaluating the strategy repeatedly and even modifying the approach when objectives are not being met or when alternative methods offer similar or better outcomes at lower cost.

Who should attend?

This IDSS training is intended for regulators, remedial project managers, and remediation engineers responsible for sites contaminated by chlorinated solvents. Attendees should be familiar with the latest evolution of site characterisation challenges; realistic planning of site restoration; evolving treatment techniques; and evaluating, monitoring and interpreting mass transport in the subsurface aqueous and vapour phases. In addition to chlorinated solvent contaminated sites, other types of contaminated sites (e.g. petroleum, mixed contaminants, etc.) will also benefit from this workshop.

 Workshop schedule

8:30am             Welcome and introductions

                         Behaviour of DNAPLs and chlorinated solvent plumes in the subsurface

                         SMART remediation objectives

10:00-10:30am Morning tea

                         Treatment technologies

                         Developing a monitoring approach

                         Remedy Evaluation

12:30pm           Close for lunch

 Workshop presenters

Naji Akladiss, Maine Department of Environmental Protection

Heather Rectanus, Battelle

Charles Newell, GSI Environmental Inc

Tamzen Macbeth, CDM Smith

Registration and Fees

Registration fees for the half day workshops are $350. This includes workshop registration, all catering, workshop materials and handouts. 

Eventbrite - Melbourne DNAPL and LNAPL Workshops