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Macro-Core Soil Sampler — Closed Piston Operation Assembly Clean and decontaminate all parts before assembly If NAC Dine Head necessary, attach new MC Core Catcher to the top of the AT 8510 cutting shoe, then slide the liner over the MC Core Catcher � onEo the cutting shoe (Figure 1) Insert the liner into the 0 � m sample tube se � MC Sample Tube MC Piston Release Rod A7 8520 � i AT-8580 i ti1C Combination i Wrench ATi � AT 8590 Liners i AT 723 i ^ AT-724 C > AT 726K C i A1C Pi Ston Bolt AT 8540 i a MC Piston Washer AT-8550 Assembled MC Locking Piston Kit MC Core Catcher AT 8531 MC Piston Point AT 8570 MC Cutting Shoe AT 8530 Figure 1 Macro Core Soil Sampler Assembly with new Closed Piston System Sampling parts Closed Piston System* Qnen a core hole will collapse, making collection of deeper ' samples with an open tube sampler ditticult or inaccurate Figure 2 Closed When this occurs, the Macro-Core Sampler can be equipped Piton Drive Point with a piston which locks into the Cutting shoe This allo%%s 4*C) and Cutting Shoe the sealed Macro-Core Sampler to pass through collapsed ready for assembly hole material and be opened to take a core at the new 1p sampling interval Note that the closed piston system is meant to be inserted through previously cored holes It is not designed to be driven trom the surtace through undis- turbed materials K The Macro-Core closed piston system can be used only with the AT 8500 series macro-Core tools Figure 3 Drive point assembly is inserted ^� in cutting shoe Patent Pending Geoprobe Systems oy� ?d¢Oa �� ^� ,Yj�V' YaY. ��Q � Y C'��`v �� p O� A�O � 4a •Q ��V'`V �l' `1� � �10 s1 � "� � B.6