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Soil Gas Sampling — PRT System Operation <br /> Basics <br /> Using the Post-Run Tubing System,one can drive probe rods to <br /> the desired sampling depth,then insert and seal an internal <br /> tubing for soil gas sampling.The usual Geoprobe probe rods 3' <br /> and driving accessories and the following tools are required: <br /> • PRT Expendable Point Holder <br /> • PRTAdapter <br /> • Selected PRTTubing <br /> r'.. <br /> Preparation ' <br /> 1. Clean all parts prior to use. Install 0-rings on the <br /> PRT Expendable Point Holder and the PRT adapter. <br /> Ki <br /> 2. Inspect the probe rods and clear them of all obstructions. PRT SYSTEM PARTS <br /> PRT Expendable Point Holder,PRT Adapters,Tubing,and O-rings. <br /> 3. TEST FIT the adapter with the PRT fitting on the expendable <br /> point holder to assure that the threads are compatible and <br /> fit together smoothly. <br /> NOTE: PRT fittings are left-hand threaded. ._ <br /> 4. Push the adapter into the end of the selected tubing.Tape <br /> may be used on the outside of the adapter and tubing to <br /> prevent the tubing from spinning freely around the adapter <br /> during connection-especially when using Teflon tubing <br /> (Figure 1). , <br /> REMEMBER: The sample will not contact the outside of <br /> the tubing or adapter. <br /> Figure 1. Securing adapter to tubing with tape. NOTE:Tape does <br /> not contact soil gas sample. <br /> Figure 2. Insertion of tubing Figure 3.Engaging threads <br /> and PRT adapter. by rotating tubing. <br /> Geoprobe Systems <br /> y��T`'�'�p v p" R h' 'v°'b" x t3 Q "p`' b;'�' A n o J�o�rlQ CS 4n d c{�t?is�t b °o tUv �Y:Di•.. <br /> D.2 <br />