Posted By Robert S Woods CNWR 2005 could this be read two ways: Health Surveillance 9. —(1) If the risk assessment indicates that there is a risk to the health of his employees who are, or are liable to be, exposed to noise, the employer shall ensure that such employees are placed under suitable health surveillance, which shall include testing of their hearing. 1) Any one exposed to or is liable to be exposed to noise (doesn’t say above the upper action value, but I think we can take that as read) should be put under health surveillance. 2) The risk assessment would say there’s a risk but with controls in place the risk would have been mitigated to an extent that any risk was negligible. If the residual risk is very low do we need health assessment?