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Sol Gas Sampling — PRT System Operation <br /> Sampling <br /> 1. Connect the outer end of the tubing to the Silicone Tubing <br /> Adapter and vacuum hose(or other sampling apparatus). <br /> 2. Follow the appropriate sampling procedure for collecting a <br /> soil gas sample(Figure 1). <br /> Removal <br /> 1. After collecting a sample,disconnect the tubing from the <br /> vacuum hose or sampling system. <br /> 2. Pull up firmly on the tubing until it releases from the r <br /> adapter at the bottom of the hole. (Taped tubing requires a <br /> stronger pull.) <br /> 3. Remove the tubing from the probe rods. Dispose of <br /> polyethylene tubing or decontaminate Teflon tubing as <br /> protocol dictates. <br /> 4. Retrieve the probe rods from the ground and recover the <br /> expendable point holder with the attached PRT adapter. <br /> Figure 1.Taking a soil gas sample <br /> 5. Inspect the O-ring at the base of the PRT adapter to verify for direct injection into a CC with <br /> that proper sealing was achieved during sampling.The O- the PITT system. <br /> ring should be compressed.This seal can be tested by - <br /> capping the open end of the point holder applying vacuum <br /> to the PRT adapter. <br /> 6. Prepare for the next sample. <br /> Geoprobe Systems <br /> :o.:. :. .:.:.:....... : ,' ' -'fJ.:e::q); :.,¢?�::.,..e..o:+'. • ?;•,'. .AF•:":.<.rvq.p:, °•xk; at?.;0,.; •�+F:.y�Oo' i6R':.kla... <br /> DA <br />