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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

Dr. Sonny Sundaram Guest Speaker at the Maxxam Sci...

On Tuesday, January 30th Dr. Sonny Sundaram, Senior Hydrogeologist, was invited to present on novel groundwater sampling and field measurement techniques at the Maxxam Science Summit in Thunder Bay, ON. …


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NOW OFFERING NON-DESTRUCTIVE TESTING (NDT)

With only a handful of firms in Canada capable of delivering non-destructive testing (NDT) investigations, DST is pleased to expand our client services to include this specialized testing. Non-destructive testing…


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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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“Deconstructing – and Recycling –...

DST Director Speaks with Engineering Dimensions Magazine on the 880 Bay Street Demolition Project George Thomas, DST’s Director of Infrastructure Client Group, had the pleasure of speaking with Duff McCutcheon…


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DST’S HUGH GILLEN IS 2017 GEOOTTAWA BEST STU...

DST Consulting Engineers Inc. is pleased to announce that Hugh Gillen, Engineer In Training working with the DST Waterloo team, was the recipient of the 2017 GeoOttawa Best Paper with…


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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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