The 401 Waterloo Multilevel System* allows detailed groundwater monitoring from many zones in one borehole, without cross-contamination between monitoring zones. When a number of systems are used at one site, a detailed 3-dimensional picture can be obtained for a more accurate assessment of hydrogeological parameters.

In 3" to 4" bedrock boreholes and pre-cased wells, Waterloo packers give permanent seals to isolate discrete zones. In overburden, Systems can be placed within pre-cased holes with packers, or installed using standard tremie placement of bentonite seals and sand packs.

The System is modular to allow ports to be located accurately at desired monitoring zones. The zones are permanently isolated by the packers or seals and each port is individually connected to the surface. Ports can be fitted with dedicated Transducers, Bladder Pumps and/or Double Valve Pumps. Alternatively, a port may be fitted with a monitoring tube that is left open for use with narrow diameter portable equipment, such as the 102 or Mini 101 Water Level Meter and a narrow diameter Waterra Pump, a Peristaltic Pump or the Micro Double Valve Pump.

Ports, packers and casing lengths are assembled, as needed, into a water-tight PVC or stainless steel casing string. The modular Waterloo System allows complete customization to each application. Systems can be installed on an angle or vertically. A drilling rig is not necessarily required during installation. Monitoring is fast and efficient, especially if dedicated equipment is used.

Removable multilevels are also available. They are similar in design, but use hydraulic pneumatic packers. For shorter term projects these systems are excellent. Multilevel Systems can greatly reduce the cost of groundwater monitoring.

* Patented