Limit Values Japan - AC Level

Administrative Control (AC) Levels for chemical substances are occupational standards with legal binding. They are established and updated by a national expert meeting convened ad hoc when deemed necessary by the Japanese Ministry of Health, Labour and Welfare in response to new scientific knowledge.

As a general rule, the expert meeting organised by the Ministry discusses:

• Threshold Limit Values (TLV) originating from the American Conference of Governmental Industrial Hygienists (ACGIH)
• Occupational Exposure Limits (OEL) originating from the Japan Society for Occupational Health (JSOH)

It then determines values of its own.

September 2012