Mining of up to 40,000 tonnes of ore from the GEM. In addition, the proponent proposes to treat up to 20,000 tonnes of existing stockpiles and tailings. This is from the Granville EPA.
750tpa / (26667 + 9000) = 2.10% grade assuming both stockpile and GEM have same grades. GEM grade is probably a little higher based on 2015 drills.
2.10% grade * 20,000 = 420 total tonnes of tin concentrate from stockpiles.
2.10% grade * 40,000 = 840 total tonnes of tin concentrate from GEM.
1,260 tonnes / 750tpa = 1.68 = 1 year 8 months or 20 months for G2 excluding extensions.
The above is just for G2 but if we were to assume we sent Traxys concentrate from the stockpiles, based on the ~$60,000 payment we sent about 4 tonnes.
4 tonnes of concentrate / 2.10% grade = 190 tonnes processed which barely dents the 20,000 to be processed.
This is how I take the stockpile figures, the cashflow report looks to be including prepaid costings for inventory so I prefer not to dabble in that as I don't like to report inventory like that. Of course, all imo and it is most likely wrong. Don't take it as advice and please do your own research rather than believing mine.