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Monitoring Well Installations & Decommissioning

Monitoring Well Installations & DecommissioningDST owns a fully operational fleet of various drilling equipment used to complete boreholes and install groundwater monitoring wells for the purposes of environmental and geotechnical studies. Drillers are licensed by the Ontario Ministry of the Environment as well drillers. All monitoring well installations and decommissioning are completed under the requirements of Ontario Regulation 903 – Wells. In general, monitoring wells are constructed of 51 mm polyvinyl chloride (PVC) well materials consisting of a 0.254 mm (0.01 inch) machine slotted section installed to intersect the water table and a solid riser extending to grade. An appropriate sand pack is used to backfill the screened portion of the well and a bentonite seal will be employed in the well annulus around the riser portion to prevent surface contamination and cross contamination between water bearing formations, where applicable. All well installations are completed with either stick-up or flush mount, lockable, metal covers that are set in place with concrete. Decommissioning wells is generally completed by pumping the well from the bottom up with a bentonite slurry using a tremie pipe and then cutting off the top 1.5 m of the well (below ground surface). All monitoring well installation and decommissioning is completed under the supervision of a qualified environmental technologist under the supervision of a Qualified Person.

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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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