The Ministry of the Environment is seeking public comment on a proposed draft manual on test holes and dewatering wells. A “test hole” is a type of “well” that is made to test or to obtain information in respect of groundwater or an aquifer, and is not used or intended for use as a source of water for agriculture or human consumption. An example of a test hole is a well that is installed at a landfill to monitor the quality of the groundwater. A “dewatering well” is a “well” is that is not used or intended for use as a source of water for agriculture or human consumption and that is made to lower or control the level of groundwater in the area of the well, or to remove materials that may be in the groundwater. An example of a dewatering well is a well that is installed at a construction site to remove groundwater and lower the water table for the excavation and construction of a building foundation.
The draft Test Holes and Dewatering Wells: Requirements and Best Management Practices manual provides a plain language summary of the Wells Regulation (O. Reg. 903/90) and other relevant legislation on test holes and dewatering wells. It provides best management practices to protect Ontario’s groundwater resources and well supplies.
The intent of the manual is to provide best practices and greater clarity for the industry and well owners in understanding the Wells Regulation and other relevant legislation that deals with wells, and to offer best management practices related to test hole and dewatering well siting, construction, maintenance and abandonment.