Indications for monitoring:
(1) results of initial and followup environmental monitoring exceed limits
(2) change in conditions affecting the risk of exposure
(3) evidence of an acute exposure
Indications for immediate correction:
(1) clinical evidence of an acute exposure
(2) 15 minute short-term exposure limit (STEL) >= 2.0 ppm
Significant findings on environmental monitoring:
(1) 8 hour time-weight average (action level) >= 0.5 ppm
(2) 15 minute short-term exposure limit (STEL) >= 2.0 ppm
If one or both of these findings are present, then periodic monitoring is required until corrected.
Conditions that might increase the risk of exposure:
(1) a significant increase in production or storage
(2) a change in equipment that increases the risk of exposure to formaldehyde
(3) a change in process that involves formaldehyde
(4) a change in personnel
(6) a change in environment and/or control measures (room temperature, ventilation, etc.)
Clinical evidence of an acute formaldehyde exposure:
(1) smell of formaldehyde
(2) lacrimation/tearing
(3) cough and other respiratory symptoms
(4) skin rash at the site of dermal exposure
Periodic monitoring is not required if all of the following are present:
(1) >= 2 environmental monitoring >= 7 days apart have been within safe limits
(2) there have been no changes in conditions affecting the risk of exposure
(3) there have been no episodes of acute toxicity reported
