all anecdotal rubbish as usual! How many outside workers have floodlights and, to repeat, where's your stats to support your argument?
But its you who went out to test the air for a water company...? A chemist tested the air? BT workers had their own sniffers when lifting a manhole...? A chemist, on their wages, went and sniffed the air for H2S and methane etc when a tech can do it with a handheld and probe? Mmm, seriously?
I can assure you that I did, although that was back in the 1970's and 80's. Nowadays they have pretty reliable portable electronic testers to do the same thing,