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0 <br /> ,o1lnst <br /> Permanent Waterloo Packers Removable Hydraulic Packers <br /> Permanent packers ensure long term integrity of seals in These packers allow reuse of the system at other zones or <br /> cored bedrock holes and cased wells. They use a water new locations. They facilitate system maintenance and <br /> activated expansion sleeve fitted over the perforated borehole decommissioning, simplify grouting of the hole <br /> packer body. A layer of porous plastic distributes water and allow most of the system to be reused. <br /> evenly to the packer expansion material. A Rubber/ <br /> Kevlar/Rubber sheath envelops the expansion material. <br /> The Kevlar layer provides strength to bridge across large <br /> fissures. The pliant gum rubber forms an effective seal <br /> against the borehole wall. <br /> I I <br /> Water is added to the inside of the sealed casing string <br /> after installation. The water passes through the packer <br /> body into the expansion sleeve, causing the material to <br /> expand. Thus an engineered seal is permanently formed <br /> against the borehole wall. <br /> r_Sample Tubing O-Ring <br /> Port Stem ' <br /> —O-Ring 'Shear Tie Slot <br /> Shear Tie Slot Insertion Pre-Inflation Inflated Deflated Removal <br /> Gum Rubber <br /> tw Outer Sheath <br /> Woven Kevlar Removable packers are made with natural gum rubber and <br /> Sample Entry Port Gum Rubber are inflated hydraulically or pneumatically by pressurizing <br /> Filter Screen Inner Sheath _ <br /> Expansion Material the interior of the Waterloo System casing string. Packers <br /> Stainless <br /> Steel PortPorous can be constructed to suit various diameters of holes. <br /> - <br /> c' Plastic Sleeve <br /> Sample Tubing o <br /> C <br /> �— Top View ° Perforated Infill Packers <br /> --I ti11 I r v ° Packer Body <br /> I J Stainless Steel — Generally it is desirable to seal off as much of the borehole <br /> '%t t ~ Sample Clamps as possible. These less expensive,bentonite-filled packers <br /> �/ tubing to == Shear Tie are available to fill long void areas between monitoring <br /> surface <br /> I I Sample Waterenters Waterloo Removable zones, as a secondary seal. <br /> Entry Ring from all sides packer Packer <br /> PVC Port <br /> Installation within Wellscreen/Casing <br /> A permanent 3" or 4" casing and screen string can be <br /> Overburden Applications installed using typical sand and bentonite placement <br /> Waterloo Multilevel Systems can be used to monitor methods. Then a Waterloo System with either permanent <br /> multiple zones within unconsolidated formations, as well or removable packers can be installed within the screen <br /> as in bedrock. There are three methods of System and casing string, as in a bedrock borehole. <br /> installation: <br /> ► Within hollow stem augers or temporary casing.Special Installs Quickly <br /> screened ports are used and flowing sand formations Installation of the Waterloo System is quick and easy. A <br /> are allowed to collapse around the System. typical System can be installed by one technician and an <br /> ► Within hollow stem augers or temporary casing using assistant, in a few hours, without the use of a drilling rig. <br /> standard tremie methods (or the Solinst Model 561 Starting with the base plug and lowermost sections, the <br /> Sand Bentonite Injector) to place sand around the components are joined together in the order required. As <br /> ports and bentonite seals in the annular space between each new port is put into position a new monitoring tube, <br /> the monitoring zones, as the augers or temporary dedicated pump and/or transducer is connected to it. <br /> casing is lifted. Successive components are threaded over these tubes, <br /> ► Within a cased and screened well. building the casing string, until the System is complete. <br /> o c <br /> High Quality Groundwater Monitoring Instruments �l nt <br />