The figure given in the Table on page 62 of the document you...

The figure given in the Table on page 62 of the document you uploaded (for the arsenic content of a concentrate sample) is 4,640 ppb (you write 4.7 ppm).

The 4,640 ppb figure is most likely a typo (kindest description). It should be 4,640 ppm (or alternatively 0.464%). Many of the other elements listed below As in the Table should also be ppm, not ppb.

Table 19 on page 657 of the following document gives the correct data:

https://www.mrt.tas.gov.au/webdoc2/app/default/document_tasxrept_detail?id=73425&pageMode=directLink