Page 5 of the same document talks about how the lithium clay at Thacker Pass is to be processed:

HANDLING SULFUR AND SULFURIC ACID SAFELY TO PROCESS LITHIUM ORE
Mining the ore at Thacker Pass will be small in scale relative to Nevada’s larger mines.  Under the proposed mining plan, Lithium Nevada’s contract miner, Sawtooth Mining, will use one hydraulic excavator and several 100-ton dump trucks to excavate and move the soft lithium clay ore from an open pit, which is no more than 400 feet deep.  Once mined, the ore will be made into a slurry and upgraded using common mining equipment called ‘hydrocyclones’.  This simple process uses water to remove the parts of the ore that contain very little lithium and works to reduce overall throughput of the material into the plant.  The upgraded slurry then goes through sophisticated processing on site to ultimately produce the ultra-pure lithium compounds required by the lithium battery industry.

I just want to draw attention of all to that last sentence: "The upgraded slurry then goes through sophisticated processing on site to ultimately produce the ultra-pure lithium compounds required by the lithium battery industry."

Of course that fits right into the scenario painted elsewhere about how Thacker Pass is a perfect fit for Tesla.   Maybe, maybe not.  I think that trying to predict what Elon Musk will or will not due is lke trying to build the Colliseum on quick sand.  A very risky business.  The better point is that the product proposed by LAC to be produced from Lithium Clay mined at Thacker Pass is, indeed, the "ultra-pure lithium compounds required by the lithium battery industry"... whether the buyer of those ultra-pure lithium compounds is Tesla or some other company.  The fact is Thacker Pass will have a very valuable product to sell on the open lithium market.. a plus for any LAC investor.