Also comes across this article. Pay attention to the last line...

Also comes across this article. Pay attention to the last line with values in bold.

Voltaic Minerals Corp. (CVE:VLT; OTC:VTCCF; FSE:2P61) holds over 4,000 acres of claims in the Paradox Basin and is well advanced with low-cost plans to explore for, and potentially extract, lithium from brines associated with the potash bed horizons.
The company’s Green Energy Lithium Brine Project is located in Grand County, Utah on ground that has already been extensively worked over by oil and gas teams. That gives Voltaic two advantages. The first is the sizeable amount of detailed drill-logging data that has been compiled over the years. The second is the existence of wells on the property, providing a much more economic and time efficient means to carry out exploration and sampling work programs.
The brine was first discovered in the 1960s when over-pressurized oil exploration wells encountered blowouts upon drilling. Historic fluid analysis returned lithium quantities ranging from 81 to 174 milligram per litre in saturated minerals brines.
174 mpl =174 ppm