Toxic canister handed to Mona Vale fire station NSW Fire Brigade Hazmat unit at Mona Vale. THE toxic canister which was handed in to Mona Vale fire station has been rendered safe and cleared away. Harkeith St, which was closed for the operation, is expected to be re-opened shortly. Earlier, Fire and Rescue NSW tweeted that if anyone found a toxic canister they should not touch it, but should call the fire brigade immediately. A toxic canister was handed in at #FRNSW's #MonaVale Fire Station today. If found, do not touch them. Call 000," they tweeted. It is the third canister to be discovered in the last few days. Last Thursday Fire and Rescue NSW were called to a house on the northern beaches after a resident said they had a highly toxic aluminium phosphide canister stored in their garage which they discovered on Warriewood beach "some time ago." Earlier last week another canister was discovered on a beach at Batemans Bay.