Risk Assessment of Contaminated Sites

Online /
Sep 25 - 26, 2024 /
Course Code: 15-0907-ONL24

The confirmation of this course depends on early registration; Register early to avoid the postponement or cancellation of a course.
  • Overview
  • Syllabus
  • Instructor


Please note, This instructor-led course has specific dates and times:
This course is held online over 2 days on the following schedule (All times in Eastern Time Zone):

10 am to 6 pm Eastern (Will include the usual breaks)

After participating in this course, you will be able to:

  • understand the overall structure of risk assessment and exposure control
  • understand how to use the risk assessment guidelines and tools
  • determine site-specific risk-based guidelines and risk management measures

In cases where the concentration of contaminants in soil and groundwater exceeds the generic regulatory guidelines, the contaminated site can alternatively undergo Risk Assessment in addition to remediation to meet these guidelines. Risk management or exposure control at contaminated sites can be deemed desirable when soil and groundwater remediation is costly and time-consuming or site-specific guidelines are to be developed.

Risk assessment is carried out based on a detailed conceptual site model and the fate and transport of contaminants in soil and groundwater to determine the likelihood of adverse health effects resulting from exposure of receptors to contaminants.

Who Should Attend
Environmental Engineers • Scientists • Consultants • Industrial Staff • Technicians and Technologists • Regulators Reviewing and Accepting Risk Assessment and Management Applied to the Contaminated Sites 

More Information

Time: 10:00 AM - 6:00 PM Eastern Time

Please note: You can check other time zones here.


Day I


Overview of

  • Regulatory framework
  • Environmental Site Assessment and delineation
  • Concept of Source-Pathway-Receptor
  • Contaminants and their toxicity
  • Human Health Risk Assessment Framework
  • The ecological aspect of risk assessment
  • Development of Conceptual Site Models (CSM)
  • Risk Management

Introduction to Contaminant Fate and Transport in Soil and Groundwater

  • Physical, chemical and biological processes
  • Transport mechanisms; advection, dispersion and reactions/decay
  • Introduction to simplified modelling tools

Conceptual Site Models (CSM)

  • Source-Pathway-Receptor characterization
  • Exposure pathways
  • Example CSMs

Toxicity and Carcinogenicity of Contaminants

  • Integrated Risk Information System (IRIS)
  • Threshold and non-threshold contaminants

Delineation Sampling and Analysis for Risk Assessment

  • delineation Requirements
  • Soil sampling
  • Groundwater Sampling

Day II

Human Health Risk Assessment

  • Overview of Guidance documents
  • Planning and Scoping Process
  • Overview of HHRA framework
  • Problem formulation
  • Chemical identification and screening
  • Receptor identification and screening
  • Exposure pathway identification and screening
  • Toxicity Assessment
  • Exposure limits
  • Toxicity of chemicals with no environmental regulatory exposure limits
  • Toxicity of mixtures
  • Exposure assessment
  • Fate and transport considerations
  • Exposure concentrations
  • Intake modelling
  • Risk characterization
  • Uncertainty analysis
  • Reporting

Ecological Aspects of Risk Assessment

  • Ecological Risk Assessment Framework
  • Problem Formulation
  • Exposure Assessment
  • Toxicity Assessment
  • Risk Characterization
  • Uncertainty Analysis

Introduction to remediation methods

  • In-situ and ex-situ soil remediation
  • Groundwater remediation methods

Risk Management and Exposure Control Approach

  • Interpretation of HHRA results
  • Incorporation of results into project design, operation and monitoring
  • Incorporation of results into regulatory approval conditions

Questions and Answers and Feedback to Participants on Achievement of Learning Outcomes


Edwin Safari, Ph.D., P.Eng.

Edwin is a licensed Professional Engineer by Professional Engineers Ontario and is a sessional lecturer at the Physical and Environmental Sciences University of Toronto Scarborough. Edwin is the inventor of Grafta™, a first-of-its-kind unique nano-graphene-based adsorbent for environmental remediation and water and wastewater treatment. He is currently the Vice President of Technology of Grafta Nanotech Inc, where Grafta™ is being mass-produced and commercialized.

Edwin has over 20 years of experience in academia and consulting in Environmental Engineering and Assessment. He has a proven track record of working and managing various Environmental projects ranging from Environmental Site Assessment, Risk Assessment, Impact Assessment, Physical and Contaminant Hydrogeology, Waste Management Planning, Landfill Design, Leachate and Gas Management and Life Cycle Assessment. Edwin has been with EPIC for over nine years and has offered Environmental Assessment, Risk Assessment and Remediation courses in various provinces in Canada.

The Engineering Institute of Canada

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Course Rating
4.4 out of 5

Overall rating of this course by its previous attendees!

Fee & Credits

$1295 + taxes

  • 1.4 Continuing Education Units (CEUs)
  • 14 Continuing Professional Development Hours (PDHs/CPDs)
  • ECAA Annual Professional Development Points

Group Training
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