knock-out criteria for ree stocks, page-7

only about 15,000 tonnes of mineral concentrate will be delivered to the hydrometallurgical plant .....

this from page 7 of the Section 38 Referral - Supporting Information Document

An on-site beneficiation plant would treat up to 750,000 tonne per annum (tpa) of ore to produce approximately 15,000 tpa of mineral concentrate. The beneficiation process would involve crushing, grinding, magnetic separation and flotation of the xenotime ore. The concentrate produced by the beneficiation plant would then be further processed via a hydrometallurgical process to produce up to 4,000 tpa of high purity mixed rare earth oxide for export overseas.

source:-

https://www.google.com.au/url?sa=t&rct=j&q=&esrc=s&source=web&cd=5&cad=rja&ved=0CD8QFjAE&url=https%3A%2F%2Fconsultation.epa.wa.gov.au%2Fseven-day-comment-on-referrals%2F13-184379%2Fsupporting_documents%2FSupporting%2520Information%2520Document.pdf&ei=76bjUpr8CK2kigepnYDACA&usg=AFQjCNHelM77mbwugJps2DqiwDptJHlPbQ