1. Typical Groundwater
Monitoring Well
Protective
Sampling Cap Surface Casing
Protection
Post
Weep Hole
Concrete Pad
Seal
Soil
Soil
Varies
Seal
Highest Seasonal
Groundwater Level
Slotted Casing
Lowest Seasonal
Groundwater Level
Bottom Cap
Gravel
Monitoring Well Depth Varies.
(Not to scale)
Typical groundwater monitoring wells are used to enhance environmental protection at landfills. WM has stringent
standards, policies, and procedures in place to ensure that a high level of consistency and quality is built into each
monitoring location. Samples are collected routinely at permit-specified time intervals, and analyzed by state
approved and qualified independent laboratories. The lab results are evaluated and then sent to local or state
regulatory agencies for review. This process allows potential environmental concerns to be identified early, and
aggressively evaluated and corrected (when necessary) in accordance with regulations and sound scientific
approaches.
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