In a major railway accident in Lac-Mégantic, Québec, involving the MMA Railway Company, approximately 100,000 liters of crude oil spilled into the Chaudière River at the site of three municipal water intakes.

The Eastern Canada Response Corporation (ECRC) and its partners conducted the response in the Chaudière River. To assist them with their heavy workload, the ECRC requested Tetra Tech's technical expertise in assessing the crude oil contamination river bed level and in determining a treatment method for the river bed and its shorelines.

Tetra Tech provided operational support and project management services, including:

  • Providing technical and scientific assistance during an emergency response
  • Assisting with developing a method to evaluate the river bed contamination level and ensuring its implementation
  • Assisting with developing a treatment method for the river bed and shorelines and evaluating it
  • Assisting with the environmental assessment, environmental monitoring, feasibility study, measurement, sampling, site supervision, and commissioning

Tetra Tech's personnel was directly involved in the situation assessment, mitigation measures, and planning and negotiations. Tetra Tech personnel also worked alongside Québec’s government agency, the Ministère du Développement durable, de l'Environnement, de la Faune et des Parcs to establish criteria and recommended techniques for completing the work.