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Macro-Core Soil Sampler — Closed Piston Operation <br /> . Removal <br /> Attach a pull cap to the top probe rod and pull out all of <br /> the probe rods until the sampler has been pulled out to <br /> dust above the surface When the sampler is visible <br /> above the surface, remove the remaining probe rod and <br /> attach a pull cap to the top of the drive head (Figure 1) _ <br /> o Continue to pull the sampler out of the hole using the <br /> mprobe control (Figure 2) <br /> If the sampler is lodged tightly in the ground refer to the <br /> r: removal steps outlined previously in this section on <br /> page B 4 <br /> Recovering the Sample <br /> Once the sampler has been removed trom the hole the <br /> soil sample is easily recovered by unscrewing the cutting Figure 1 Attach pull Figure 2 Pulling Macro- <br /> shoe and pulling the liner out The exterior of the cap to drive head for Core Sampler <br /> cutting shoe features a notch for attaching the removing sampler from <br /> combination wrench to loosen tight threads (Figure 3) ground <br /> When the shoe is loosened, pull liner rrom the sample <br /> tube(Figure 4) The sample material tills the liner and <br /> moves the piston assembly to the top or the liner <br /> (Figure 5) <br /> lr <br /> 4 Figure 3 Loosening <br /> cutting shoe with the <br /> • f Combination <br /> Wrench Wrench <br /> s <br /> e <br /> Figure 4 Removing <br /> filled sample liner <br /> from sample tube <br /> y� <br /> .61 <br /> tet'y <br /> f y <br /> py S <br /> Figure 5 Closed <br /> piston assembly <br /> remains inside filled <br /> s � 'fa�sf sample liner <br /> Geoprobe Systems <br /> B.] 0 <br />