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Environmental Site Assessments

Environmental Site AssessmentsDST has conducted numerous Phase I/II/III Environmental Site Assessments across Canada. A Phase I Environmental Site Assessment consists of a review of historical reports and records, interviews, a site reconnaissance, and other research to identify potential or existing environmental contamination liabilities. This evaluation assesses the underlying condition of the land as well as historical and current usage. If significant environmental contaminating activities are discovered through the Phase I ESA, then a Phase II ESA is undertaken to confirm and describe the presence/absence and extent of contamination. This involves a review of information from the Phase I ESA and the collection of soil, groundwater, and sediment samples in order to quantitatively analyze the presence or absence of contamination. Methods used to collect samples may include the advancement of test pits, boreholes, monitoring wells, or soil vapour collection. A subsequent Phase III ESA delineation study may also be undertaken to describe the depth or spread of a contamination plume. During the Phase III ESA, we aim to further delineate the horizontal and vertical depth of contamination and will undertake further testing, sampling, and monitoring. A Phase III ESA typically also involves evaluation of remediation methods and options, costs, and feasibility of site cleanup. DST also completes National Classification System for Contaminated Sites scoring for contaminated sites under federal jurisdiction. Such studies conform to CSA standards, provincial regulations (eg. O. Reg. 153 as amended), as well as federal CCME methodologies.

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Community Events

DST Heads Up North for the Nunavut Mining Symposiu...

Iqaluit, Nunavut is a central hub for the northern territories in Canada. Each spring this small but vibrant northern city fills up with visitors flocking to the Nunavut Mining Symposium…


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RBC Future Launch Program at DST Thunder Bay

Over the past year, in partnership with Lakehead University and RBC, Amanda Sauermann, Senior Marketing Specialist at DST Consulting Engineers Inc, has had a placement student under the Future Launch…


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Nanticoke Stack Demolition: 2 stacks, 650 ft, 10 s...

On Wednesday, February 28th, the Nanticoke, Ontario skyline was changed forever as the two 650 ft stacks at the Nanticoke OPG plant were toppled by a controlled explosive blast.  After…


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DST @ 2018 Insurance Institute Cambrian Shield Cha...

The DST Consulting Engineers team in Sudbury were happy to participate in the 2018 Insurance Institute Cambrian Shield Chapter Sudbury Curling Bonspiel. This annual bonspiel supports The Infant Food Bank…


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“The Making of the Super CHRO”

DST Director of Corporate Services Philip Wilson examines the qualities of a ‘ super ‘ CHRO. What critical elements define a ‘super’ Chief Human Resources Officer (CHRO)?  And, what role…


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Blasting Videos

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Our qualified blasting engineers design more than just rock-cuts and mines. They take down structures! Reinforced concrete buildings, smokestacks, steel tanks…

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