Clean Harbors Announces $600 Million Senior Notes Offering

Clean Harbors, Inc. (“Clean Harbors”)

announced today that it is commencing a private placement of $600 million of Senior Notes due 2020 (the “Notes”). Clean Harbors intends to use the net proceeds of the offering to purchase any and all of its outstanding 7.625% Senior Secured Notes due 2016, which are accepted for purchase in its concurrent tender offer and consent solicitation for such notes. Clean Harbors intends to use any remaining net proceeds from the offering for general corporate purposes. 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.