the filing and use of the technical report summaries titled “Technical Report Summary, Ottawa Mine, LaSalle County, Illinois,” “Technical Report Summary, Colado Site, Pershing County, Nevada” and “Technical Report Summary, Lamesa Site, Lamesa, Dawson County, Texas,” (collectively the “Technical Reports”), with an effective date of December 31, 2021, amended as of September 30, 2022, as a exhibits to and referenced in the Form 10-K;

the use of and references to our firm name, including our status as an expert or “qualified person” (as defined in Subpart 1300 of Regulation S-K promulgated by the Securities and Exchange Commission), in connection with the Form 10-K and the Technical Reports; and

the information derived, summarized, quoted or referenced from the Technical Reports, or portions thereof, that was prepared by us, that we supervised the preparation of and/or that was reviewed and approved by us, that is included or incorporated by reference in the Form 10-K.

Executive Summary

Introduction

Property Description

Accessibility, Climate, Local Resources, Infrastructure and Physiography

History

Geologic Setting, Mineralization and Deposit

Exploration

Sample Preparation, Analyses and Security

Data Verification

Mineral Processing and Metallurgical Testing

Mineral Resource Estimates

Mineral Reserve Estimates

Environmental Studies, Permitting, Plans, Negotiations or Agreements with Local Individuals or Groups

Adjacent Properties

Other Relevant Data and Information

Interpretations and Conclusions

Recommendations

References

Reliance on Information Provided By The Registrant

/s/ Thomas O. Mathews