Record trigger times or measure using a HAV meter... It depends on risk assessment - if I was miles from any action levels I would just record as such, if I was approaching action I would measure and record to prove levels, if I was close to limit I would record very very carefully.

If you already have the vibration assessments for your tools, you could carry out a periodic assessment of what a "typical" day's work looks like, obviously with the employees' cooperation. Check that this is within limits and show it to anyone auditing you. Not every company can justify the cost of expensive monitoring. We use Reactec but it's only ever in use for a tiny fraction of our workforce. Whoever's in charge of your joiners on site should also have the info on the tools and understand how to keep the joiners under 400 points or whatever limit you select. Good luck

Always a thorny issue, where a proportionate approach might be sensible. Your Risk Assessment should be clear how the initial exposure (trigger) times came about. The Auditor will look for evidence that the R/A assumptions remain valid - usually via some robust review and validation process - much as you propose.

That's an interesting point David. When does auditing become interfering? His NCR was for not having a risk assessment in place, which I suppose is correct. We had assessed each item, and briefed the guys, but did not have an assessment which addressed the various tools together, and totalling the exposures.