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�l3Z�3Jlll'I 2 '9Ei '11=254tT-11ITH ENVIRONMENTAL TECH COP`" DAM <br /> 13E i34 <br /> Soil Gas .Sampling ---- PRT System Operation <br /> Probing <br /> Drive tyre PRT tip cpn{;ouration lrsto the ground- Connect <br /> probe reds as necessary to reach the desired depth. After <br /> depth has been reached,dimnlidge the expendable point <br /> pulling up on the probe rads- Remove the pull cap from the <br /> top probe rod,and position dsv CAOProbe unit to allow room <br /> Probe RW to work. <br /> Conne+ation <br /> t. Inbert the adaver rind of the tubing down the Inside <br /> diameter of the Probe rads(Figure 23. <br /> 'tubing <br /> Z. Feed the tubing down the rod bare until it hits batten on <br /> lite expendable point!~older. Allow'about 2 ft., <br /> (610 mm)of tvbiol;tq"tend out of the hole before <br /> cutting it. <br /> 3. Grasp the excess tubing and apply some downward <br /> WT wdaipter pnemre while turning it in a countereiockwise motion to <br /> engage the adapter threads with the expendable pokes - <br /> holder(Figure 3), <br /> , O-Ring - <br /> 4. Pull up lightly on the tubing to test engagerrwrit of rhe <br /> threads. (Failure of adapter to thread could mean that <br /> intrusion of soil may have occurred during driving of <br /> probe rods or diseng*rnern of drive point-it <br /> PRT Expendable <br /> Ppinr I-M�Iden <br /> Q-Ring - <br /> E erwable <br /> Drive Paint <br /> A cross section of probe nxb driver' <br /> W depth and then retracimll to allow <br /> 'for soil gas sampling. The PRY <br /> adapter acrd 4+binit ane ftow fed <br /> through the rods and coated to form <br /> a vacuum-tight connection at the <br /> point holder. The result is a <br /> continuous run of tubing front the <br /> • aampie teval sa ttia sMefsee. • <br /> - <br /> L <br />