Sifto Canada Corp., a subsidiary of Compass Minerals (NYSE: CMP), has reached a tentative agreement with the Communications, Energy and Paperworks Union Local 16-O, which represents employees at the company’s salt mine in Goderich, Ontario. Union officials have indicated that they intend to put the agreement to a ratification vote in early September. The mine’s management will continue to produce and ship rock salt to customers at reduced rates until union members ratify the agreement and return to work. “We’re pleased that we could work with union negotiators to reach a mutually beneficial tentative agreement on all matters pertaining to a new three-year collective agreement,” said Angelo Brisimitzakis, Compass Minerals’ president and CEO. “We are looking forward to our Goderich mine employees returning to work as soon as possible.” About Sifto Canada Corp. Sifto Canada Corp. operates the world’s largest rock salt mine in Goderich, Ontario, and is Canada’s leading provider and marketer of highway and consumer deicing salt. Sifto also is a premier provider of high-quality food salt, water care minerals, agricultural minerals, and many other consumer and industrial salt and mineral products. Sifto is a wholly owned subsidiary of Compass Minerals. For more information, visit www.siftocanada.com. About Compass Minerals Based in the Kansas City metropolitan area, Compass Minerals is a leading producer of minerals, including salt, sulfate of potash specialty fertilizer and magnesium chloride. The company provides highway deicing salt to customers in North America and the United Kingdom and specialty fertilizer to growers worldwide. Compass Minerals also produces consumer deicing, water conditioning and pool products, ingredients used in consumer and commercial foods, and other mineral-based products for consumer, agricultural and industrial applications. The company also provides records management services to businesses throughout the U.K. For more information, visit www.compassminerals.com. This press release may contain forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. These statements are based on the company's current expectations and involve risks and uncertainties that could cause the company's actual results to differ materially. The differences could be caused by a number of factors including those factors identified in the "Risk Factors" sections of our Annual and Quarterly Reports on Forms 10-K and 10-Q. The company undertakes no obligation to update any forward-looking statements made in this press release to reflect future events or developments.