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5 Remove the drive cap from the expendable point holder Install an O-ring on the point holder in the groove located at the base of the male threads(Fig 5 2) ' IMPORTANT: O-rings must be used to seal the 3 25-inch Probe Rod joints NOTE Make sure the O-ring groove and O-ring mating surface are clean. Any foreign material located ' in these areas will prevent the O-ring from sealing properly 6 Lubricate the O-nng and O-ring mating surface(Fig 5 3)with a small amount of clean water Apply ' the water with either a moist cloth or a spray bottle 7 Thread a 3 25-mch Probe Rod onto the expendable point ' 8 Place the drive cap on the probe rod and advance the rod string O-Ring Groove O-ring 3 25-in Probe Mating Rod or Surface ' Expendable Point Holder ;. O-Ring (9960) FIGURE 5 2 FIGURE 5 3 Probe Rod O-Ring Groove Lubricating O-Ring and Mating Surface 9 Remove the drive cap Again,install an 0-ring in the probe rod's O-ring groove Lubncate the O-nng and the 0-ring mating surface(Fig 5 3) Add the next probe rod,replace the drive cap,and advance ' the rod string 10 Repeat Step 8 until the leading end of the rod string is 1 5 inches (3 8 cm) below the bottom of the ' desired screen interval The additional depth adjusts for the extra height created by the expendable point and the PVC Bottom Plug The top probe rod must also extend at least 15 inches 138 cm)above the ground surface to allow room for the rod grip puller used later in this procedure (An additional rod may be added if necessary) Move the probe foot back to provide access to the top of the rod string 53 Deploying the screen and riser pipe 1 With the probe rods driven to the proper depth, the next step is to deploy the screen and riser pipe Inspect the 1 0-m x 2 5-in OD Prepack Screen(s)to make sure that a) the plastic plug is removed b) the stainless steel screws are snug (See Fig 5 4) ' standard Operating Procedure Page 12 1 Qin x 2 S in OD Prepack Screen Monitoring Well 1