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Table 2 Occupational threshold levels from OSHA, NIOSH, ACGIH, and AOHS

From: Mercury vapor volatilization from particulate generated from dental amalgam removal with a high-speed dental drill – a significant source of exposure

  1. Various occupational threshold levels referenced from the OSHA Website ( and GoAB (Government of Alberta) Occupational Health and Safety Act, Occupational Health and Safety Code. Edmonton, AB: Government of Alberta; 2009 illustrate the inconsistency of various responsible agencies.