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ti <br /> 4 <br /> TWO Ways to Os toll: <br /> a <br /> I. IN COLLAPSING SANDS: <br /> • Well screens are attached at the surface <br /> • Drive casing is driven to desired depth � . <br /> • Well is inserted and casing is withdrawn - <br /> • Sand collapses around the multi-level <br /> monitoring well <br /> Inserting the fully constructed multi-level monitoring <br /> well into drive casing prior to withdrawing the casing <br /> 2. WITH INTEGRATED <br /> SANDPACK AND <br /> BENTONITE PACKER <br /> SEALS: <br /> . Well screens and g <br /> sandpack sock are •� <br /> attached to tubing <br /> • Bentonite packets <br /> installing <br /> are secured to tubing <br /> polypropylene mesh sleeve Constructing a bentonite packer <br /> between monitored seat <br /> intervals <br /> k <br /> 1 <br /> • Drive casing is <br /> advanced to target <br /> zone <br /> • Multi-level well is <br /> inserted and casing is <br /> f <br /> withdrawn <br /> The well is simply inserted into the drive casing The ' <br /> The multi-level well is constructed drive casing is then wandr rwm The bentonite <br /> completely above ground packers swell when hydrated,sealing the borehole <br /> between monitored zones <br /> 1 800 671 4744 <br /> California Florida Texas www precisionsampling com <br />