Q4 Impact Group, LLC

8050 Freedom Ave. NW North Canton, Ohio 44720

CONSENT OF THIRD-PARTY QUALIFIED PERSON

Q4 Impact Group, LLC (“Q4”), in connection with the annual report on Form 10-K and any amendments or supplements and/or exhibits thereto (collectively, the Form 10-K), consent to:

•the filing and use of the technical report summary titled “Technical Report Summary, Lamesa Site, Dawson County, Texas” (the “Lamesa Technical Report Summary”), with an effective date of December 31, 2021, as an exhibit 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 any such Lamesa Technical Report Summary; and

•the information derived, summarized, quoted or referenced from the Lamesa Technical Report Summary, 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.

Q4 is responsible for contributing to, and this consent pertains to, the following Sections of the Lamesa Technical Report Summary:

1.0    Executive Summary

13.0    Mining Methods

14.0    Processing and Recovery Methods

15.0    Infrastructure

21.0    Other Relevant Data and Information

22.0    Interpretations and Conclusions

23.0    Recommendations & Associated Costs

24.0    References

25.0    Reliance on Information Provided By Registrant

Q4 also consents to the incorporation by reference in Registration Statements on Form S-8 (Nos. 333-256389, 333-238198, 333-204062, 333-179480) and Form S-3ASR (No.333-258323) of

U.S. Silica Holdings, Inc. of the above items as included in the Form 10-K.

Q4 Impact Group, LLC

/s/ Robert Archibald

Robert Archibald CEO

Q4 Impact Group, LLC a Qualified Third-Party Firm Dated this February 24, 2022