U.S. Silica Recognized for Superior Environmental Performance by Wisconsin Department of Natural Resources

FREDERICK, Md.--(BUSINESS WIRE)--Oct. 10, 2013-- U.S. Silica Holdings, Inc. (NYSE: SLCA) today announced that it has been recognized by the Wisconsin Department of Natural Resources (WDNR) as a partner in the WDNR Green Tier program. In becoming a Green Tier participant, U.S. Silica demonstrates its commitment to achieving superior environmental and economic performance.

According to the WDNR, the Green Tier program provides incentives such as regulatory flexibility, minimized inspection frequency and permit streamlining to environmentally responsible businesses. Qualified companies make commitments to superior environmental performance through agreements negotiated with the Department of Natural Resources. In exchange, the businesses are provided with flexibility in achieving their environmental goals.

In order to become a Green Tier partner, U.S. Silica had to demonstrate a satisfactory environmental record, commit to superior environmental performance and implement an Environmental Management System at its Sparta, Wisconsin facility.

Mike Winkler, vice president of operations, commented that, “sustainability is a company-wide commitment that we practice every day. As a founding member of the Wisconsin Industrial Sand Association we understand the importance of achieving higher environmental standards. Our commitment to sustainability is the reason we have succeeded as a company for the last 100 years, and it is the reason why we plan to remain a good neighbor in our communities long into the future.“

About U.S. Silica

U.S. Silica Holdings, Inc., a member of the Russell 2000, is one of the largest domestic producers of commercial silica, a specialized mineral that is a critical input into the oil and gas proppants end market. The company also processes ground and unground silica sand for a variety of industrial and specialty products end markets such as glass, fiberglass, foundry molds, municipal filtration and recreational uses. During its 100-plus year history, U.S. Silica Holdings, Inc. has developed core competencies in mining, processing, logistics and materials science that enable it to produce and cost-effectively deliver over 250 products to customers across these end markets. U.S. Silica Holdings, Inc. is headquartered in Frederick, Maryland.

Source: U.S. Silica Holdings, Inc.

U.S. Silica Holdings, Inc.
Mike Lawson
Director of Investor Relations and Corporate Communications
301-682-0304
lawsonm@ussilica.com