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NOTE- Slide the probe rods over the tremae tube and place neatly on Geoprobe Grout Machine the ground next to the grout machine (Gs1000) Be careful to not pinch or bind the Plastic Plug flexible tubing as this forms weak (13227) spots which may burst when pressure ' is applied NOTE Try to avoid filling the up- per I2 inches (305 mm)of well an- 1 Fill Probe Rods nulus with grout when pulling the ex- with g!Fut from bottom up pendable point holder This will 2 continue make for a cleaner well cap installa- operating grout tion machine while withdrawing rods 6 When all probe rods have been retrieved and the well is adequately Tremie Tube High solids (Flexible Tubing, grouted,unstring the tremie tube and Bentonite slurry 14299) begin cleanup It is important to forms well seal promptly clean the probe rods,grout Bentonite seal machine, and accessories This is especially true of cement mixes as t they quickly set up and are difficult Grout Barrier to remove once dried 57 Surface Cover/Well Protection A surface cover protects the PVC well riser from damage and tamper- ing Although aboveground and flush-mount well covers may be used, most Geoprobe monitoring wells FIGURE 512 have been installed with flush-mount Grouting Well Annulus with covers (.Fig 5 13) Consult the Geoprobe GS1000 Grout Machine project planners and/or appropriate regulators to determine the approved well cover configuration for your specific application 1 In order to fit under a flush-mount cover,the top of the well riser must be below the ground surface Place the well cover over the riser and push it into the ground to mark the cover diameter Remove the cover and dig out approximately 6 inches(l 52 mm)of soil from within the cover mark 2 Remove the plug from the I 0-inch PVC riser The top of the riser should be approximately 2 inches (51 mm)above the bottom of the hole If a joint is near this level,unthread the top vscr if a joint is not positioned near the specified level, cut off the riser with PVC cutters Cut at a slight angle to make it ' easier to remove the plug Place a plug(13227)in the well riser Do not apply duct tape at this time NOTE Do not cut off the riser with a hacksaw as cuttings will fall down into the screens r • Standard Operating Procedure Page 20 1 0-m x 2 5 in OD Prepack Screen Monitoring Well