Clean Harbors to Offer Stock and $550 Million Senior Notes

Date: November 26, 2012

Source: Clean Harbors, Inc.

Clean Harbors, Inc. (Norwell, MA) announced that it has initiated a follow-on public offering of 6 million shares of common stock and that, once the pricing of the stock is determined, it plans to commence a private placement of $550 million of senior notes due 2021. The company said it plans to use the net proceeds of both transactions to finance a portion of its recent purchase of Safety-Kleen, Inc. and its subsidiaries and related transaction fees and expenses.

See also: "Clean Harbors to Acquire Safety-Kleen for $1.25 Billion," (, October 29, 2012.

November 26, 2012

Clean Harbors Announces Planned $550 Million Senior Notes Offering

Clean Harbors, Inc. ("Clean Harbors") (NYS: CLH) announced today that it plans to commence, promptly following the anticipated pricing of a public offering of 6.0 million shares of Clean Harbors' common stock which Clean Harbors has previously announced, a private placement of $550 million of Senior Notes due 2021 (the "Notes"). Clean Harbors intends to use the net proceeds of both the offering of common stock and the proposed offering of the Notes to finance a portion of the purchase price for its previously announced proposed acquisition of Safety-Kleen, Inc. and its subsidiaries and related transaction fees and expenses.

The Notes will be offered in the United States to qualified institutional buyers pursuant to Rule 144A under the Securities Act of 1933, as amended (the "Securities Act"), and outside the United States pursuant to Regulation S under the Securities Act. This press release shall not constitute an offer to sell or the solicitation of an offer to buy, nor shall there be any sale of, the Notes in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction. The Notes will not be registered under the Securities Act or the securities laws of any other jurisdiction and may not be offered or sold in the United States absent registration or an applicable exemption from registration requirements.

Safe Harbor Statement

Any statements contained herein that are not historical facts are forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. These forward-looking statements are generally identifiable by use of the words "believes," "expects," "intends," "anticipates," "plans to," "estimates," "projects," or similar expressions. Such statements may include, but are not limited to, statements about Clean Harbors' proposed acquisition of Safety-Kleen and business outlook and financial guidance and other statements that are not historical facts. Such statements are based upon the beliefs and expectations of Clean Harbors' management as of this date only and are subject to certain risks and uncertainties that could cause actual results to differ materially, including, without limitation, those items identified as "risk factors" in Clean Harbors' most recently filed Form 10-K and Form 10-Q. Therefore, readers are cautioned not to place undue reliance on these forward-looking statements. Clean Harbors undertakes no obligation to revise or publicly release the results of any revision to these forward-looking statements other than through its various filings with the Securities and Exchange Commission, which may be viewed in the "Investors" section of Clean Harbors' website.

About Clean Harbors

Clean Harbors is the leading provider of environmental, energy and industrial services throughout North America. The Company serves more than 60,000 customers, including a majority of the Fortune 500 companies, thousands of smaller private entities and numerous federal, state, provincial and local governmental agencies.

Headquartered in Norwell, Massachusetts, Clean Harbors has more than 200 locations, including over 50 waste management facilities, throughout North America in 38 U.S. states, seven Canadian provinces, Mexico and Puerto Rico.

For more information, contact:
Clean Harbors, Inc.
James M. Rutledge, 781-792-5100
Vice Chairman, President and Chief Operating Officer
Sharon Merrill Associates
Jim Buckley, 617-542-5300
Executive Vice President

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