What is monitoring well

The type and length of the well will vary based on the details of each property. The purpose is to measure the amount of groundwater available. Monitoring wells also serve the purpose of allowing easy access for analyzing groundwater samples for contamination. For property owners with an on-site well, this is an important part of keeping their water supply healthy and plentiful. There are several types of monitoring wells. The most common type is an individual monitoring well — a basic monitoring well placed in a specially drilled borehole.

However, if you need to monitor water at various levels and from various sources, you may require one of the other types of wells.

A nested monitoring well or clustered monitoring well are two types that use multiple wells at varying lengths. The difference being the nested monitoring well contains all these wells within the same borehole, while clustered monitoring wells are each in their own borehole.

Given the important purpose of monitoring wells , you want to be sure that your monitoring well is installed correctly. Monitoring well as used in this chapter , means any artificial excavation by any method for the purpose of monitoring fluctuations in groundwater levels , quality of underground waters , or the concentration of contaminants in underground waters. Monitoring well means a well used to measure groundwater levels and to obtain water samples for water quality analysis.

Monitoring well means a well constructed with a surface seal and a sand filter pack in order to provide for the collection of representative groundwater samples for laboratory analyses.

Such wells may also be used to detect the presence of free product or collect water- level elevation data to aid in determining the direction of groundwater flow. Monitoring well means a well drilled to measure groundwater levels and collect groundwater samples for the purpose of physical , chemical or biological analysis to determine the concentration of groundwater constituents ;.

Monitoring well means a well designed to obtain a representative ground water sample or designed to measure the water level elevations in either clean or contaminated water or soil …. Monitoring wells may vary in diameter depending upon their intended application, and are typically comprised of polyvinyl chloride PVC or stainless steel.

The materials used in constructing monitoring wells and the type of equipment used to install them are determined by site-specific factors such as local geologic conditions and project objectives.

Monitoring wells are installed into the underlying aquifer by various types of drilling methods, including:. Once a monitoring well is installed, it must be properly developed in order to enhance the natural hydraulic flow into the well from the geological formation beneath the Site, remove organic or inorganic materials that may be in the well as a result of construction, minimize the amount of sediment in the water samples collected from the well, and ensure that any samples collected are truly representative of the quality of groundwater moving through the aquifer.

Monitoring well development entails removing copious quantities of water from the well while assessing certain water quality parameters, and generally takes place a minimum of 24 hours after installation is completed in order to ensure that the well materials are set in place.