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<br />Page 2 of 2 5/9/18 r1 <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br />Figure 1. Schematic for sample collection using disposable syringes. <br /> <br /> <br />Note: In general, syringe assemblies may be reused for multiple samples. If extremely high <br />concentrations are expected at a sampling location, a clean syringe assembly may be desirable for clean <br />sites. <br /> <br />Sample collection: Turn valve so the ‘Off’ position is toward the valve vent; Pull plunger to desired volume. <br />Sorbent Tube 3-way valve <br />Tube holder Sample Inlet <br />‘Off’ position <br />Empty Syringe: Turn valve so the ‘Off’ position is toward the sorbent tube; Push plunger back to starting position. <br />‘Off’ position Valve vent