Bottom quartile costs of production

I had another listen to the video posted earlier today where Keith stated that EMH will have bottom quartile costs given:
1) the size and homogeneity of the ore body.  
2) Other by products (such as tin, potash etc) which can be extracted and will help offset production costs.
3) Location in central Europe

Questions re point 2
Is anyone aware of the various costs and methods of extraction of the various by products so as to realise their value and thus offset costs of production of Lithium to realise bottom quartile costs of production?

When the lithium is extracted are other processes then required to extract tin etc and if so are they expensive/cheap/time consuming?  

Assumptions re selling price Lithium and by products will also become an important component of the PFS.  To this end I attach a link for another Lithium company which is likely to go into production next year with some useful estimates of Lithium prices over the coming years per Deutsche Bank etc.

http://alturamining.com/wp-content/uploads/2017/03/2017-03-16-Beer-Co-Research-Report.pdf


Comments most welcome.

Andrew