1. Calibrate each personal sampling pump with a representative sampler in line. 2. Remove front and rear caps from the tube immediately before sampling. Attach sampler to personal sampling pump with flexible tubing. 3. Sample at an accurately known flow rate between 0.5 and 2 L/min for a total sample size of 5 to 60 L. 4. Cap the samplers and pack securely in dry ice for shipment.