The Tender Offer is contingent upon the satisfaction of certain conditions, including, without limitation, the raising of at least $600 million in gross proceeds by the Company from the New Notes offering described above. If any of the conditions are not satisfied, the Company is not obligated to accept for payment, purchase or pay for, and may delay the acceptance for payment of, any tendered Notes and may even terminate the Tender Offer. Full details of the terms and conditions of the Tender Offer and Consent Solicitation are included in the Company’s offer to purchase and consent solicitation, dated July 16, 2012.Requests for documents relating to the Tender Offer may be directed to Global Bondholder Services Corp., the Information Agent, at (866) 794-2200 or (212) 430-3774. Goldman, Sachs & Co. will act as Dealer Manager and Solicitation Agent for the Tender Offer and the Consent Solicitation. Questions regarding the Tender Offer and Consent Solicitation may be directed to Goldman, Sachs & Co. at (800) 828-3182 and (212) 357-0345. Forward Looking Statements 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 the Company’s 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 the actual results to differ materially, including, without limitation, those items identified as “risk factors” in the Company’s most recently filed Form 10-K and Form 10-Q. Therefore, readers are cautioned not to place undue reliance on these forward-looking statements. The Company 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 the Company’s website at www.cleanharbors.com. 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.