Clean Harbors Issues Response to Relational 13D, Calls Talks with Fund Over Last Two Months 'Positive'

Clean Harbors, Inc.

, the leading provider of environmental, energy and industrial services throughout North America, today commented on the April 24, 2014 filing of a Schedule 13D by Relational Investors, LLC (“Relational”), which stated that Relational owns 9.08% of Clean Harbors' common stock. Chairman and Chief Executive Officer Alan S. McKim, said, “Clean Harbors has a long history of transparency and open communications with shareholders. Our Board of Directors and management team are committed to building long-lasting value for all of Clean Harbors shareholders and we welcome their investment in the Company.” “Clean Harbors has a proven track record of delivering value to our shareholders. In fact, over the past decade, our stock has outperformed the S&P 500 by more than 12 times during that timeframe. Led by our management team, we have achieved our outstanding long-term performance through a combination of targeted acquisitions and steady expansion through organic growth.” “In the past two months, we have held positive discussions with Relational. Their investment in Clean Harbors demonstrates their agreement with us that there is additional value in our Company. We agree with Relational's statements regarding our strong position in the hazardous waste market and their endorsement of our plan to continue to invest in capacity expansion in these businesses. Relational supports our efforts to expand our margins and improve asset utilization to create superior equity value. We are closely aligned with that viewpoint as we continue to work toward our previously stated long-term objective of achieving 20% Adjusted EBITDA margins.”