Monitoring Well Filter Sand

Other applications can include dewatering well and monitoring wells.

Monitoring well filter sand.

The space between the screened section and borehole is backfilled with filter sand typically fraction silica sand. Installation of a filter pack and screen may not be necessary for wells completed in competent bedrock. This table shows changes to this controlled document over time. January 29 2013 revision history.

Well rounded sand or gravel that is placed between the formation and the screen. Generally a well functions as a monitor or as a pumping or production well. The most recent version is presented in the top row of the table. If the well is completed with a screen as opposed to an open hole finish in hard rock then the screen usually is surrounded by a sand pack placed by the driller.

Previous versions of the document are. Thomas kwader presents some guidelines for making your choice. Wells designed to monitor groundwater to evaluate the changes in the physical chemical and biological properties of water. The annular space above the sand pack is then sealed to prevent surface.

Mounded bentonite soil mixture well screen well cap riser or stand pipe unslotted soil surface unlined bore hole lined bore hole. Piezometer 4 2 1 1 2 6 bentonite seal filter pack of sand figure 1. Selecting the appropriate sand pack can be a challenge. Monitoring well design and installation february 2008 governor.