Action Limits means the minimum and maximum values of a quality assurance measurement that can be interpreted as representing acceptable performance with respect to the parameter being tested. This denition can be interpreted as the least and most that can be done to prevent and protect from exposure to chemical and noise hazards. It helps maintain and reduce the amount of exposure in a working environment that can cause harm to workers if exceeded. Based on Action Limits, hazardous exposures to workers should be 50% or lower than the Occupational Exposure Limit {DEL}. Occupational exposures are monitored through medical surveillance to maintain a non-hazardous working environment for workers. If the level of exposure exceeds the action limit (SI)??? of DEL], it is required that workers be removed from the worksite to prevent further harm. The occupational exposure limit [DEL]I set different levels and the maximum airborne concentration of a toxic substance to which a worker can be exposed over a period of time without suffering any harmful consequences