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Standard Lithium Advances South West Arkansas Project with Positive Feasibility Study

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Standard Lithium Ltd. (SLI) has announced the exercise of its option agreement with TETRA Technologies, Inc. for the South West Arkansas (SWA) Project. This move solidifies the Company’s strategic direction, building on insights from the recent Preliminary Feasibility Study (PFS).

Unlocking Commercial Potential

Andy Robinson, President and COO of Standard Lithium, stated, ‘Our primary goal is to unlock the commercial potential of the Smackover Formation. The TETRA acreage within the SWA project area has delivered outstanding results from our exploration efforts. Our defined total resource has grown over 100% within the last five years, with an improved average lithium concentration of 437 mg/L. Having secured the exclusive lithium brine rights, we are poised to progress the SWA project to FEED and Definitive Feasibility Study stages.’

Agreement Details

The Agreement with TETRA, entered in 2017, granted the Company the exclusive option to the brine production rights on approximately 27,000 net acres of brine leases located in Columbia and Lafayette Counties, Arkansas. Exploration activities commenced in 2018 to identify lithium-bearing brines. Shortly thereafter, the Company announced a maiden inferred mineral resource of 802,000 tonnes lithium carbonate equivalent (LCE) at an average lithium concentration of 199 mg/L from the SWA Project area.

Preliminary Feasibility Study

The Company recently completed a PFS for the SWA Project, demonstrating robust economics and high lithium brine concentrations in North America. The PFS indicates base-case production of 30,000 tonnes per annum (tpa) of battery-quality lithium hydroxide with the potential to produce up to 35,000 tpa over a 20-year operating life. The base-case project economics yielded a pre-tax NPV of US$4.5 billion and IRR of 41%, assuming production of 30,000 tpa. The Company anticipates completing a FEED and Definitive Feasibility Study for the SWA Project in 2024 and beginning construction in 2025. First commercial production is expected in 2027.

About Standard Lithium Ltd.

Standard Lithium is a leading near-commercial lithium development company focused on the sustainable development of lithium-brine bearing properties in the United States. The Company’s signature projects, the Phase 1A Project and the SWA Project, are located on the Smackover Formation in southern Arkansas near the Louisiana state line. The Company also has an interest in certain mineral leases located in the Mojave Desert in San Bernardino County, California.

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