Ann: Quarterly Activities and Cash Flow Reports - 31 Dec 2022, page-33

10% is approx the estimated recovery of SOP from the KTMS.

"Operations team in place and salt harvesting operations ongoing, with 107kt
KTMS feed (equivalent of 10,700 tons of SOP) delivered to ROM stockpile as at
mid September 2021"

https://app.sharelinktechnologies.com/announcement/asx/7fd05d32fea31ef60679a3bdba73955d page24

Perhaps it's 50% of the expected recovery. Certainly not 50% of the feed.

Bottom line is at the moment we are recovering less than 2%. 780t SOP from 40kt KTMS this qtr. And we are not harvesting enough KTMS. We need 200kt per qtr KTMS required.
From 40kt they should have recovered about 4kt of SOP - optimistically.