Individual and Representative Testing

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Due to individual difference in chemical sensitivity and employee work practices, it is best to test each and every person wherever and whenever possible. You should choose individual testing when:

  • You are starting a new program and need baseline studies.
  • An employee displays symtoms or expresses concerns about exposure.
  • The department frequently changes personnel.


After you have established your exposure-monitoring program and previous testing shows a history of work practices along with a safe work environment, you may want to use representative testing.

  • Use the most restrictive testing when possible. Identify and test any and all Maximum Risk Employees.
  • Choose workers who perform the same duties in the same locations throughout your facility.
  • Test all new employees with exposures and anyone with unique exposures.
  • If you cease using a specific chemical then it is best to dispose of it.

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