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NIOSH 7400 Method with OSHA 8 Hour (TWA)

Category Asbestos Lab Services
Test NIOSH 7400 Method with OSHA 8 Hour Time Weighted Average (TWA)
  • TWA's (Time Weighted Average) are used for personnel sampling.  
  • Compliance with OSHA limits is the most common objective.
  •  Analysis is performed via NIOSH 7400 and results for one or more samples (per individual) are combined into an 8 hour Time Weighted Average (TWA) result. 
  • Sample retention time is 60 days   

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