nysm_NYD wrote: ↑18 Jan 2024, 4:37 pm
ironfistdoug wrote: ↑18 Jan 2024, 12:24 pm
If it's that general drain smell... the water in a concrete pipe & the concrete dust being stirred (we used to call it "sweet smelling drains"), then it's an actual thing (like how rain hitting the city during the summer gives off a certain smell).
Someone way smarter than me described it recently... maybe it was Iso?
The drain smell could be a combo of gas waste from algae and bacteria, cement, rubbish, stuff that's washed in, trolley wheels, homeless guy/drunk guy urine, car tyres, etc. And poop, probably. I dunno I never really thought about it... Companies like ALS do gas sample testing so if we could capture some air from inside a drain they might be able to analyse it to see what particles are in the air. Not sure I wanna know
The "after rain smell" is called Petrichor, I think it's something in soil that gets picked up when rain hits warm ground and evaporates into gas
The smell I'm thinking of is when you first go in a concrete drain in summer.
Not the musty pooey gassy smells you find further up drains.
Another drain smell that always smells the same is the brown rust-like mud that seeps out of some drains. Mummy tunnel had lots of these deposits & if you were unfortunate enough to brush against them, it looked like you had s*** on you.
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