They havent completed a full drilling program yet, they have...

They havent completed a full drilling program yet, they have only released part of their first drilling target, the full results should be out soon. They might post some of the other contaminent levels then.

All I can find on Silica levels are from the RMWise Research paper available on Mindax website:

The collection of nearly 1394 samples together with detailed 1:1000 mapping has now covered around 40% of the area of interest with 921 samples collected at 25m spacings (table 1). Other elements, such as Phosphorus (0.058%) and Silica (5.13%), were within acceptable
levels.