One of our pipeline clients discovered a pin hole in one of their pipelines that was leaking natural gas and liquids into the soil. Our client needed to understand the extent of the contamination, and most importantly, prevent the contamination from spreading to domestic water wells and the nearby river.


Matrix Solutions, as the prime contractor, conducted the initial spill response for the project and determined the extent of the subsurface impacts. Matrix directed the excavation, biopile treatment, and backfill of 780 m3 of soil from the area immediately surrounding the pipeline break point.

During the assessment phase, free-phase hydrocarbons were discovered on the groundwater table. To address the impacts, Matrix installed and operated a multi-phase extraction (MPE) system and thermal oxidizer to remove and treat approximately 60 m3 of hydrocarbon gas and fluids from the subsurface. Chemical oxidation was then used to further reduce the hydrocarbon levels in the groundwater and subsurface.  Monitored Natural Attenuation (MNA) is being used to manage the site until subsurface hydrocarbon concentrations reach the acceptable criteria.


With support from Matrix, the client was able to prevent hydrocarbons from reaching potential receptors and cost effectively manage the environmental liability associated with the leak.




Oil and gas


6 years

We routinely lead characterization of stream morphology to:

  • Assess fluvial erosion hazards
  • Develop alternatives for erosion control in environmental assessments
  • Develop management strategies as part of land use planning (subwatershed, secondary, tertiary plans and site plans)
  • Assist in culvert/bridge design
  • Define erosion thresholds to inform stormwater management

Related Projects

Jack Tennant Memorial Bridge Fish Habitat Offsetting

Jack Tennant Memorial Bridge Fish Habitat Offsetting

The Jack Tennant Memorial Bridge Fish Habitat Offsetting Project was required by Fisheries and Oceans Canada to offset the impact on fish and fish habitat resulting from the temporary instream bridge berm installed for the Jack Tennant Memorial Bridge Project.

read more

Learn about some of the interesting projects Matrix’s team of environmental consultants and engineers get to be a part of.

Got a specific question about a project or opportunity?

Use this form or the email address below to drop us a line and we’ll make sure it gets sent to the appropriate Matrix team.

General inquiries

Use the email below to contact our reception mailbox

Join the Matrix Team

We’re always looking for great people who share our values.

I hereby accept the terms and agreement