The GHS is the
'Globally Harmonized System of Classification and Labelling of Chemicals'
The GHS classifies chemicals by types of hazard and helps to communicate information about hazardous chemicals on labels and safety data sheets.
It is the kind of thing you come across in mandatory online workplace health and safety training, and has convenient symbols representing hazard types in 1 to 9 categories.
The listed coordinates are on Pyrites Rd near the intersection with Manganese St. Park there on the gravel and take a short walk on the dirt track to the cache.
The cache is not at the listed coordinates.
The cache is a mini 'decon' container with log, pencil and unactivated trackable (FTF).
No need to go near or behind the fence.
Check the checker if checkered.