I have to agree with Bullish , that waiting untill end of Dec/ Jan to truck the whole 500T would be prudent..... especially when you consider the cost and only a partial sample anyway.
I think that a rep sample should be sent in for caustic analys, but thats JMHO.
I'd rather focus on drilling over the next 2 months untill the ice road allows the delivery of the whole 500 Tones..
Of coarse this will give the typing chimps on SH lots of fodder, but I can't be bothered even going there any more.