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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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We are in Full Operation

Adapting to Working Remotely to Keep Project Work Going.   Impacts of the COVID-19 pandemic are far reaching with very few left unaffected. Our business, our people, and our clients…


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International Society of Explosives Engineers R...

DST Consulting Engineers Inc. is proud to announce our commitment to the International Society of Explosives Engineers – Eastern Canada Chapter. As a founding sponsor, we are investing in this…


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OACETT Award Winner 2019

Andrew Couturier, second row far left, pictured with the other award winners. Congratulations to Andrew Couturier for receiving the 2019 Outstanding Community Service Award from the…


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Young Professionals in St. John’s

Every three years, in conjunction with the annual Canadian Geotechnical Society annual conference, the Canadian Young Geotechnical and Geoscientists Conference occurs. This event brings together young professionals from across Canada…


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Bump! Spike! Set!

Another year, another great time at the  HOPE Beach Volleyball tournament held annually at Mooney’s Bay in Ottawa, Ontario.   The DST VolleyBrawlers had a fantastic time serving up fun…


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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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