1. Calibrate each personal sampling pump with a representative sampler in line.
2. Remove the caps of the sampler immediately before sampling. Attach sampler to personal sampling
pump with flexible tubing.
NOTE: With a multi-bed sorbent tube, it is extremely important to sample in the correct direction, from
least to maximum strength sorbent.
3. For general screening, sample at 0.01 to 0.05 L/min for a maximum sample volume of 6 L. Replace
caps immediately after sampling. Keep field blanks capped at all times. Tubes can act as diffusive
samplers if left uncapped in a contaminated environment.
4. Collect a "humidity test" sample to determine if the thermal adsorption tubes have a high water
background.