Dene Tha' Hay Lake Old School Remediation

The focus for this program is on continuing the remediation of the contamination (hydrocarbons) that exists in both the saturated and unsaturated zone of the soil. The contamination will be treated with  combination of in situ chemical oxidation and ex situ bioremediation based on areas of particular concern to the community and areas with previous difficulties with insitu treatment. ISCO (in-situ) is planned to continue for zones where excavation is restricted due to existing land use and infrastructure and outside the former school footprint; excavation and bioremediation treatment (ex-situ) will be conducted for areas where ISCO is not feasible.

Latest update

November 18, 2020 – Indigenous Services Canada issued its notice of determination and determined that the project is not likely to cause significant adverse environmental effects.


Key documents

Key documents
Document Number Document Title File Date
2 Notice of Determination for the Dene Tha' Hay Lake Old School Remediation - November 18, 2020
1 Public Comment Period on Intent to Make a Determination - October 8, 2020


Indigenous Services Canada
Stacey LeBlanc, Sr. Environment Officer
630 Canada Place, 9700 Jasper Ave
Edmonton, Alberta T5J 4G2
Telephone: 780-782-8350

  • Location

    • Dene Tha' First Nation (Alberta)
  • Nature of Activity

    • Remediation and conservation
  • Assessment Status

  • Start Date

  • Proponent

    Dene Tha' First Nation
  • Authorities

    • Indigenous Services Canada
  • Assessment Type

    Project on federal lands
  • Reference Number


This map is for illustrative purposes. The markers represent the approximate locations based on available data. More than one marker may be identified for a given assessment.


Nearby assessments

...within 200 kilometres
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