You are here

Toxic Pollution Threats

Monitoring well

Monitoring or observation wells are used to detect groundwater contamination, soil gas vapors or "separate-phase" gasoline, fuel oil, dry cleaning solvents and other "products." Round metal well covers are between five and eight inches in diameter, are marked with a triangular delta symbol and are located in "tree lawns" (the area between the curb and the sidewalk) or on payment. If you see monitoring wells, underground contamination is probably nearby.

click image to see full size view

Pages