Do you do environmental noise?
As the two disciplines sound very similar, environmental noise and workplace noise are often mixed up with each other but in reality they are very different specialities. Environmental noise includes:
Nuisance noise measurements
External noise for things like planning permission - runways, roads, turbines, etc.
Event (usually big music festivals) noise planning
Environmental impacts for noise
Acoustic testing for things like noise transmission in buildings
The very exciting sounding 'forensic acoustics'
As my speciality is noise at work I can't really help you, and we don’t do environmental noise assessments. But, rather than leaving you dangling, if you are looking for any information on this I would point you in the direction of someone like dBx Acoustics who seem pretty damn good on the kind of stuff.