Exit Health Monitoring On the contrary there is a lot of validity in this testing , particularly hearing tests. First for the individual themselves whether its work related or not. And secondly while it may be difficult to establish work relatedness, for hearing there are questionnaires that the employer completes, the individual completes and the GP completes. ACC then pro-rata costs. This works pretty well in our experience and fairly establishes what is work related and what is not. If baseline testing was done at start of employment, and if the employer could clearly establish controls in place, then any loss would likely be after hours. So the value of this testing shouldn't be dismissed