The chlorine plant was built in 1957.
This is what the area looked like in 1946
https://vintageairphotos.com/bo-46-129/
1956 (pretty far away so not much detail)
https://vintageairphotos.com/bo-56-395/
They used to have 1600 tonnes of liquid chlorine stored on site but have reduced that 94% and it'll be reduced to 4 tonnes (maybe with the new proposal).
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