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REHS EPH Program Week Five Practice Test

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Which water body is tested via wells in landfill monitoring?
Correct Answer:
Groundwater
Explanation:
Groundwater is the water body tested using wells in landfill monitoring. Monitoring wells are drilled into the subsurface around the landfill so samples can be taken from the groundwater and checked for contaminants that might migrate from the waste. This is how inspectors track potential leachate movement and protect drinking water sources. Leachate is the contaminated liquid that drains from the waste and is managed separately through a collection and treatment system, not by sampling the surface around the site with groundwater wells. Lagoons are surface water bodies used for storage or treatment of liquids, and rainwater is rainfall; neither is the target of groundwater monitoring with wells.

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