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II i Iffiri N �. 2.2 SAT ENv1FtOPROSE(R) SAMPLING SYSTEM E .--� roue which is attached (�] stem consists of a stainless steel P are pushed T The BAT EnviroProbe system The probe and casing robe is to the end of a string of one-inch I.D. steQl casing' fin depth,the p w . the CPT rig. Upon reaching the desired sampling a stainless steel into the ground using approximately one foot,thereby eXP g lowering a opened by retraCiing the casing app les are colle:.ted by sampling screen. Groundwater and/or SOVntaining an evacuated glass or Teflon(R) cylindrical sampling kit down the casing kit reaches the bottom of the teeing and acantcontact ned at the sample vial. As the samplingodarmic needleat the the top of the probe, a double ended spuloaded gW sealing septum at the top lin kit temporarily p o;arl� enetrates bottom of the sampling vial robe. At the same time,the other end of the dole v al nThe v cuum inside the sample probe. the bottom of the samp a similar septum sealing probe. andtY�rough th$needle into the sample then draws the formation fluids into t the samp�ng kit up out of the casing. As the vial. The samp1e is retrieved by pulling needle retracts from both septa the septa immediately reseal themselves. given location purges the volume inside the fe collected'at a 9 robe is in The initial fluid samp les can be collected once the p A 35-m1 double ended glass sample vial is used ` probe. An indefinite number of subsequent sem ~ place at the desired depth,and purged. vial,the increase in pressure for purging, While the formation fluids enter the purge connected a ressura transducer which is connected tors a top end inside the vial is monitored using P pressure hypodermic needle and septum. The transducer of the vial by means of an hypod „ surface. The change in p ilei readout box at �''s the speed of samp le collection. When via an electric cable to a dig provide an inside the vial as a function of time rtablee computer, this data can also input into a specially programme P sampled. T estimate of the thydraulic conductivity of the formation being ermarierit monitoring point by round and sampling periodically, or it can be he BAT EnviroProbeinl system can thus be used as a P rdoe is leaving the probe and casing in :he 9 lin locations, the P stalled repsatedly at different locations. Between sampling before reassembly. ,n ntamination p disassembled and subjected to a three-stage deco na using a lab detergent solution. The The first stags consists of washing components, of the probe are then rinsed twits in deionized acted after each use. componentss are rep including the stainless steel screen and various o-ring 7 11