TETRA Technologies, Inc. announced the completion of a Technical Resources Study ("Report") for its 6,138 acre "Evergreen Brine Unit" in Arkansas. TETRA previously announced the Evergreen Brine Unit comprises brine assets contributed by TETRA and Saltwerx, LLC, a wholly owned subsidiary of ExxonMobil ("Saltwerx"), that was unanimously approved in September 2023 by the Arkansas Oil and Gas Commission ("AOGC") to form the first newly established brine unit in Arkansas in nearly 28 years. TETRA had previously announced the results of its maiden inferred resources report on its 5,100 gross acres proposed unit.

The Report that is being announced further advances the resources and includes both "measured" and "indicated" resources in addition to the "inferred" category, reflecting higher confidence in the existence of the resources evaluated by the Report. The Report estimated that the Evergreen Brine Unit contains the following: 1,413,000 tons of elemental bromine consisting of approximately: 329,000 tons of Measured Resources; 543,000 tons of Indicated Resources; 541,000 tons of Inferred Resources; 137,000 tons of lithium consisting of approximately: 32,000 tons of Measured resources; 53,000 tons of Indicated resources; 52,000 tons of Inferred resources. Using a conversion factor of 5.323 to convert elemental lithium to lithium carbonate equivalent (LCE) it is estimated to contain in total 729,251 tons of LCE.

Mineral resources are estimates and therefore, inherently imprecise, and dependent upon a number of assumptions, which are further discussed in the Report. The resources estimates and brine ownership percentages in the Report are consistent with and assume completion of existing contractual obligations. Following the drilling and completion of a second test well within the Evergreen Brine Unit and utilizing information available from Standard Lithium wells near the Evergreen Brine Unit, the Report was completed and submitted by RESPEC Company LLC ("RESPEC") with geological and reservoir technical support provided by Lonquist Engineering ("Lonquist").

RESPEC is a leading consulting firm to the mining & energy, water and natural resources industries. The second test well was completed in August 2023 and provided additional reservoir information, including lithium and bromine fluid analysis, reservoir pressures and thickness, porosity, and permeability, amongst other information to meet the higher quality resource standards in this Report. An extensive well test was also completed on the well which provided brine deliverability information consistent with the planned and modelled flow rates from future production wells.