Here's another one from their ABC."Since the 1870s, untreated...

Here's another one from their ABC.

"Since the 1870s, untreated water from the mine was pumped into the wetlands between Beaconsfield and the Tamar Estuary.

The company's executive director, Roger Jackson, said testing found an average gold grade of 3.2 kilograms per tonne, with an estimated value of $30 million."
Beaconsfield Gold mine owners 'draining the swamp' for $30m gold haul - ABC News

My highlighting.

I suggest that the actual "gold grade is 3.2 grams per tonne", not what has been reported. 3.2 g/t is still a good grade.