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Table 2 Participant weekend sampling schedule. Weekend sampling (n=13)

From: Biological exposure assessment to tetrachloroethylene for workers in the dry cleaning industry

Week Monday . . . Friday
1    Breath Sample PM
    Urine Specimen PM
2 Breath Sample AM   Breath Sample PM
  Urine Specimen AM   Urine Specimen PM
3 Breath Sample AM   Breath Sample PM
  Urine Specimen AM   Urine Specimen PM
4 Breath Sample AM   
  Urine Specimen AM   
  1. AM = morning specimen collected at home (urine) or just before entering the facility (breath).
  2. PM = afternoon specimens collected at the end of the workday inside (urine) and outside (breath) the facility.
  3. Not all participants were sampled in four consecutive weeks
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