[c4ptnjack]

Working at an industrial hygiene company that works with large train companies in particular, doing studies on everything from asbestos to air particulates.

The entire industry is around finding where those issues exist, using accurate data to track it, and solve whatever problems come up to avoid the large risk of getting sued by employees or communities nearby.

I did QA on all the data that came in from labs and matched it all the various input samples we sent off. Incredibly thorough testing procedures, redundancy, and tracking over time was the name of the game for my companies entire business. They've been successful for 30+ years doing that too.