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tS—Ub-1`��`] I t1ttAM 1!_kUM p 5 <br /> • <br /> 1.0 OPERATION <br />' 4J Decontamination <br />' Betore and after each use thoroughly clean all part-, cit the. Srnl %ampling syste-n according to specific, <br /> prayectrequnemem3 , A clean,new liner tis recomn>ended foi taLh uac. Darts should also be inspected for <br /> wear or damage at this rime <br />' 4? Assembly <br />' i install a new AT-63R O-Riag into the O-Ring groovt,on the stop-pin <br /> 2 Scat ib%;pre-flared cnd of the.L13 ,hner over the interior end of the cutting shoe as shown in I~fo 3 It <br />' should fit snugly <br /> Insert the liner into either encs of the sample tube and sc mw tha,4utting Shoe and liner into place It <br />' exceti,bive re%tstance is ncountered dunng rhi-,tzsk, it ma) bc,nCLceasary to use the LB -,hoe wrench <br /> Pfau, the,wi ench on Lha Bound and position rhe sampler assembly w ith the shoe end down so that the <br /> recessed notch on Lhe cumng shoe align-,%ith the pin in the socket of!he wrench(1-ts 4) Pueh down <br />' on the .ample tube wmle tui ming it until the cutting shoe is threaded ughtly into place <br /> 4 Sc,Tvw the piston rod tato Lho pu ton tip Insert the p,ston tip and rod into the sample tube from the enol <br />�• apposite tlLc cutting shoo Push and rotate; the rid unit] rhe tip is suited cornplcicly irito tht. -ultino, <br /> shoe <br /> 5 Screw the drive head onto the top end of the sample -,otic:,aligning the piston rod through the center <br /> bore <br /> 6 Screw the revers.^»threaded stop-pin tttro the top of the dzive bend and turn it counterdock witse with <br /> a 3/8-inch wrench until securely tightened (Trig 5) Hold the drive head in place with a 1-1/4-inch of <br /> 'Edjtistable wrench while completing Chis Usk to assure that;the drive held st iy� completely seated <br /> ri-m Macro.0 orc.0 C omhinanon WrLnch %viii fil the dove head for 125-inch piobe rods 'Me <br /> a,scrrably is now oornplcte <br /> 43 Pilot Hole <br /> fA pilui Wko I, Agpropiiaw Whin the surface to be penevated contains, gravel, asphalt, hard sands, or <br /> rubble Pre-probing will liicvcnt unnecc&-,aryweir on the samplin,.,, tools A Large Bore Pre-Probe,may <br /> I be used for diEt purpose The pilo* hole Should be made ortly to i ucpth above the sampling interval <br /> Surface Where puverrienu, are present, a bole may be drilled with the Geoprobe Soil Probirig Machine <br /> ttsi0` a drill ,Wcl (At 3524, AT 3536 or AT-3548 clependnIS upon the thicknes-q of the pav=ent), <br /> Tipped with a 15-inch dtarnetei carbide drill bit (AT-36) prior to ptobing <br /> MOTE: Some soil ccinditrocis may warrant using a solid drive point(AT-142B) to pre-probe the hole to <br /> tltc dc-*ircd %,unphng dcpth Intorrnation about the subsurface and depth to bedrock Should hc. known <br /> hefore driving the ,ampler Dani gc may occur if the ,a nplvr is dnven Into rock or other impenetrable <br /> • rne;erlal <br /> Siamdard Ope@rarinq Pro;idurc Pd e 7 i.aq,e Bore Soil Saninicr <br />