Wannabe, the 1500 tpd mill was something ECU management told me they were hoping to purchase in the future and that phone call was about 1 year ago. Unfortunately the silver and junior market has fallen apart since then and purchase of that mill in my opinion is unrealistic at this time. TPD stands for Tonnes per day. As far as I can tell, the new 500 tpd mill will be able to process the old oxide tailings, old gold pyrite concentrates and any newly mined oxide ores. The oxide ores are generally close to the surface while the sulfides are deeper. ECU has much more sulpides than oxides, but the oxides they have already found are enough to supply the new 500 tpd mill for over 13 years if it is run at 300 tpd.