Advantage Lithium Corp. announced an update on the completion of drilling and pumping test activities at the Cauchari JV property located in Jujuy Province, Argentina. The Phase III drilling program has been completed with some of the deepest holes drilled in the Cauchari-Olaroz basin to date, reaching a maximum depth of 617 m in CAU26, with the Deep Sand unit present at the end of the hole. Drill hole CAU19 was completed in the southwest of the SE Sector to a depth of 519.5 m. This hole intersected the Deep Sand unit from 434 m to 519.5 m (a thickness of >86 m), with sand continuing at the end of the hole. This extent of the Deep Sand is further defined by intersections in drill holes CAU11, CAU12, CAU13 and CAU26. In CAU12 the Deep Sand unit extends over more than 249 m vertically, beginning at 360 m below surface and continuing to the end of the hole at 609 m. Brine samples from CAU19 in the Deep Sand unit averaged 611 mg/l Li, and 4,483 mg/l K with a Mg/Li ratio of 2.1:1, while the lithium concentration in the overlying evaporite and clay sequence averaged 427 mg/l over a 300 m interval. Confirmation of the considerable thickness of the Deep Sand unit and the elevated brine concentration in the sand unit in CAU19 is an excellent result. Analyses are awaited from sampling of the Deep Sand Unit in holes CAU12, CAU13 and CAU26. Drilling has further confirmed the positive characteristics of the Deep Sand unit in terms of both porosity and permeability for future extraction. Hole CAU25 was drilled in the north of the SE Sector, to the north of CAU22. CAU25 intersected a sequence of clay, halite and interbedded fine sand units to a depth of 427 m. Brine sampling of the hole returned an average concentration of 497 mg/l Li and 4,045 mg/l K from 169 m to 345 m depth with a low Mg/Li ratio of 2.6:1. CAU26 was located in the southern portion of the SE Sector and successfully intersected the westward extension of the Deep Sand unit. Results of CAU26 brine analyses are awaited. Drill holes CAU12 and CAU13 were deepened to determine the thickness of the Deep Sand unit, as previous drilling at these sites only intersected the upper part of this unit. This new drilling has confirmed a thickness greater than 249 m in CAU12, and a thickness of greater than 100 m in CAU13 with both holes terminated in the sand. The Deep Sand unit appears to have favourable porosity and permeability characteristics. Core samples are currently being analysed for drainable porosity and other physical parameters in the GSA laboratory in the US. The Deep Sand unit appears to constitute an important source for future brine production in addition to the sands and gravels of the NW Sector of the Project. The interpretation of the Deep Sand unit is depicted in Figure 4, which illustrates the vertical extent of the unit and continuity between drill holes. The 30 day constant rate pumping test has been completed on test production well CAU11 in the SE Sector. The test was performed at a pumping rate of 18.4 l/s with a constant drawdown of 25 m in the pumping well. Water levels were also measured in a network of surrounding observation wells completed to different depths relative to the Deep Sand unit. Brine concentrations were monitored throughout the test. The brine concentration averaged 512 mg/l Li and 4,735 mg/l K throughout the test with a Mg/Li ratio of 2.6:1, confirming the result of the 48 hour pumping test announced in February 2018. The 30 day constant rate pumping test in CAU07 is underway in the NW Sector and will be completed in mid-January. The pumping test is carried out at a rate of 22 l/s with a drawdown of 40 m. Assays received for the first 7 days of the test averaged 647 mg/l Li and 4,980 mg/l K, with a Mg/Li ratio of 2.2:1. The CAU07 pumping rate is limited by well construction constraints and higher pumping rates are expected in future production wells based on the observed aquifer conditions. Brine samples are collected at regular intervals during the test and complete analyses will be available around the end of January 2019.