Workshop on Toolkits for Sustainable Remediation of Petroleum Hydrocarbons

: May 12, 2022 ◊ Time: 8:30 am to 12:15 pm ◊ No registration required

Sponsored by

Shell and Contaminated Sites Approved Professional Society (CSAP) of BC

This free half-day workshop is on the Toolkits for Sustainable Remediation of Petroleum Hydrocarbons, a four-volume set of tools designed to integrate the latest science into a decision- framework to identify, evaluate and optimize remedial options for petroleum hydrocarbon-contaminated sites.  These toolkits include an approach for remedial decision-making that considers the role of natural attenuation processes, and guidance and tools on conducting sustainability evaluations.

The first two toolkits, Conceptual Site Model (CSM) and Case Studies (Toolkit 1) and Methods for Monitoring and Prediction of Natural Source Zone Depletion (NSZD) and MNA (Toolkit 2), were published in 2016 to help document the latest science on NSZD and natural attenuation.  In 2021, Evaluation of Remediation Technologies for Petroleum Hydrocarbon Sites (Toolkit 3) and Methods for Sustainable Remediation (Toolkit 4) were published (  The workshop will largely focus on Toolkits 3 and 4, leading participants through an end-to-end process for site management and closure that includes:

  • developing and building upon an effective CSM;
  • identifying concerns/risks and remedial objectives;
  • evaluation of natural attenuation;
  • selecting remedial measures and performance / transition metrics in context of sustainable approaches; and
  • optimizing remedial approaches, including transition to other remedies or natural attenuation / NSZD and site closure.

The workshop will describe how to incorporate NSZD and MNA into the site remediation process, presenting the benefits of both natural and enhanced attenuation. The principles and basis for sustainable approaches will also be addressed together with a roadmap for conducting sustainability evaluations, including emerging considerations for resilient sustainable remediation and climate change.  Toolkit implementation will be discussed from both a technical and regulatory (BC and other jurisdictions) perspective. Opening and closing panel sessions will be used to help frame the workshop and identify current status, possible barriers, and desired future outcomes and needs.

As a workshop participant, you will be introduced to new approaches for site remediation, including integrating quantitative evaluations of natural attenuation into the site remediation process.  In addition, you will learn how to implement a step-wise, optimized approach where MNA and NSZD are often selected following active remediation. Tools will be provided on a range of technologies and use of the new Sustainability Dashboard will be demonstrated. While case examples will be on petroleum hydrocarbon-contaminated sites, many of the principles embodied in the toolkits apply broadly to contaminated sites management.

This workshop will broadly benefit individuals active in different environmental sectors, including consultants, regulatory agencies, industry, and academia. The workshop facilitators include the authors of the toolkits, who are recognized experts in their fields.

Facilitators and Panelists

Dr. Ian Hers, Ph.D., P.Eng., CSAP, Hers Environmental Consulting, Inc. (HEC)

Ian Hers (Ph.D., P.Eng) is the founder and Principal of Hers Environmental Consulting, Inc. Ian’s practice focuses on applied research, innovative and practical solutions, and technical/regulatory advice for contaminated site investigation and remediation projects. He has developed numerous guidance on soil vapour intrusion locally and internationally and conducted ground-breaking research on natural attenuation and sustainable remediation. Ian is a Contaminated Sites Approved Professional in BC, on the Board of the Science Advisory Board for Contaminated Sites and has served on numerous teams with the Interstate Technology and Regulatory Council.

François Beaudoin, GHD

François Beaudoin is a project director and business group leader in GHD’s Montréal office. During his 20 year career, François Beaudoin has been involved in a wide range of contaminates site projects across multiple geographies which has helped him to develop a solid expertise in the field of contaminant hydrogeology, and in the selection, design and implementation of remediation techniques. François Beaudoin is passionate about teamwork, technical excellence, innovation, and integrating sustainability principles in everything he does. He is one of the founding members of the Sustainable Remediation Forum of Canada.

Dr. Parisa Jourabchi, Ph.D., P.Eng., ARIS Environmental Ltd.

Parisa Jourabchi (Ph.D., P.Eng.) is the founder and chief scientific officer of ARIS Environmental Ltd. who brings a multidisciplinary and collaborative approach to site investigation and remediation. Parisa holds a bachelor of engineering physics and masters in geophysics from UBC, and a Ph.D. in biogeochemistry from Utrecht University, The Netherlands. Parisa conducts applied research on projects that include assessment of natural source zone depletion (NSZD) rates at petroleum hydrocarbon sites, vapour intrusion, and the development of toolkits for the evaluation of monitored natural attenuation (MNA), NZSD, remedial technologies and sustainability. She contributes to guidance development and has extensive experience in numerical and analytical modeling for environmental applications. Parisa is currently leading the development of an ASTM Standard Guide for Estimating Natural Attenuation Rates for Non-Aqueous Phase Liquid (NAPL) in the Subsurface.

Dr. Matthew Lahvis, Ph.D., Shell Oil Products US

Matthew Lahvis is a Principal Engineer at Shell Oil Products US and provides support on soil and groundwater issues related to the company’s oil and gas operations.  Matt has authored several papers on petroleum vapor intrusion and serves as an Associate Editor for the Ground Water Monitoring and Remediation journal.

Linda Kemp, P.Eng., WSP Golder

Linda Kemp is a Senior Environmental Engineer in WSP Golder’s Vancouver office who has been working in the contaminated sites industry in BC for 18 years.  She is a registered professional engineer responsible for design, management, and execution of site investigation and remediation projects, with much of her work focussed on remediation of petroleum hydrocarbon and chlorinated solvent sites using risk-based remediation strategies.

David Mitchell, P.Eng., Active Earth

David is a registered Professional Engineer and graduate of the University of British Columbia, with a degree in Geological Engineering.  He is a Principal Senior Engineer with Active Earth Engineering Ltd.

David has over 25 years of experience in environmental assessment and multidisciplinary remediation projects for a wide variety of clients including Developers, Private Investors, Financial Institutions, Federal and Provincial Governments and First Nations.  David has obtained a large number of regulatory approvals across the Province for a wide variety of projects.

David has served on the CSAP Performance Assessment and Professional Development committees.

Guy Patrick, P.Eng., CSAP, Patrick Environmental

Mr. Patrick is a contaminant hydrogeologist and environmental engineer with over 40 years of experience in the assessment and remediation of contaminated sites in soil, sediment and bedrock environments.  He provides technical training via in-class courses and webinars through GeoEnviroPro, with a focus on effective use of conceptual site models in site characterization, risk assessment and remedial planning.  As Managing Director of Patrick Consulting Inc. and a Contaminated Sites Approved Professional in the Province of British Columbia, Mr. Patrick’s expertise also includes strong technical review and project oversight.


Date: May 12, 2022; 8:30 – 12:15 PM Pacific Standard Time (BC)

Cost: Free – Event Zoom link (no registration required)

Project funding by CSAP and Shell is gratefully acknowledged

Eligible for Continuing Education Credits

Event Zoom link (no registration required)


Welcome, Overview and Objectives – Dr. Ian Hers (5 min; 8:30-8:35)

Opening Perspectives of the Panel – Panelists TBD, moderated by Guy Patrick (25 min; 8:35-9:00): Panelists representing regulatory, applied research, approved professionals and consulting, and industry areas will help frame workshop including the current status of sustainable remediation, motivation and need for new approaches (including toolkits) and desired outcomes.

 Participant Polling Questions and Discussion – All (10 min; 9:00-9:10)

 Toolkits for Sustainable Remediation – Rationale and Overview – Dr. Ian Hers, HEC (10 min; 9:10-9:20)

Overview of Best Practices for Assessment of Natural Attenuation (Update on Guidance / Methods in Toolkits 1 and 2) – Dr. Parisa Jourabchi, ARIS Environmental Ltd. (25 min; 9:20-9:45)

A New Framework for Efficient, Optimized and Sustainable Site Remediation Process (Toolkit 3) – Dr. Ian Hers, HEC (25 min; 9:45-10:10)

 Break – 15 min (10:10-10:25)

 Sustainable Remediation – A Framework, Roadmap and Tools (Toolkit 4) – Dr. Ian Hers, HEC (30 min; 10:25-10:55)

Considerations for Application of Toolkits within BC Regulatory Framework – Linda Kemp, Golder Associates (15 min; 10:55-11:15)

Case Study of End-to-End Remediation Process for Setting Objectives, Options Evaluation, Implementation, Optimization and Transition (Toolkits 1-4) – Dr. Ian Hers, HEC (15 min; 11:15-11:35)

Panel Discussion and Participant Q&A – Panelists (45 min; 11:30-12:15)

Panelists representing regulatory, applied research, approved professionals and consulting, and industry areas will discuss what we have learned, current gaps and next steps and answer participant questions.

 Closing Comments – (12:15)