1. Calibrate each personal sampling pump with a representative sampler in line.
2. Transfer 20 mL sampling medium to an impinger, and connect to sampling pump with flexible tubing.
NOTE: Prepare field blank samples by transferring 20 mL sampling medium to 20-mL vials.
3. Sample at an accurately known flow rate between 1 and 2 L/min for taotal sample size of 15 to 360 L.
4. Estimate final impinger volume to the nearest 0.5 mL. Record on sample submittal sheet.
NOTE: DMSO is hygroscopic; therefore, final sampling volumes may be greater than 20 mL.
5. Transfer the sample solution to a 40-mL opaque vial for shipment. Secure screw cap with sealing band.
6. Obtain a bulk sample (1 to 2 mL) and the material safety data sheet for each component of the
formulation.