Shareholder Services

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, and involve risks and uncertainties. These forward-looking statements are generally identifiable by use of the words "believes," "expects," "intends," "anticipates," "plans to," "estimates," "projects," or similar expressions. These forward-looking statements are subject to certain risks and uncertainties that could cause actual results to differ materially from those reflected in these forward-looking statements. Such statements may include, but are not limited to, statements about the benefits of the acquisition of Eveready, including future financial and operating results, the combined company’s plans, objectives, expectations and intentions and other statements that are not historical facts. Such statements are based upon the current beliefs and expectations of Clean Harbors’ management and are subject to significant risks and uncertainties. Readers are cautioned not to place undue reliance on these forward-looking statements, which reflect management’s opinions only as of the date hereof. 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. A variety of factors beyond the control of the Company may affect the Company’s performance, including, but not limited to:

• The Company’s ability to manage the significant environmental liabilities that it assumed in connection with prior acquisitions;
• The availability and costs of liability insurance and financial assurance required by governmental entities related to the Company’s facilities;
• General conditions in the oil and gas industries, particularly in the Alberta oil sands and other parts of Western Canada;
• The possibility that the expected synergies from the acquisition of Eveready will not be timely or fully realized;
• The extent to which the Company’s major customers commit to and schedule major projects;
• The occurrence of events such as the recent Gulf spill, which require cleanup and other services;
• The Company’s future cash flow and earnings;
• The Company’s ability to meet its debt obligations;
• The Company’s ability to increase its market share;
• The effects of general economic conditions in the United States, Canada and other territories and countries where the Company does business;
• The effect of economic forces and competition in specific marketplaces where the Company competes;
• The possible impact of new regulations or laws pertaining to all activities of the Company’s operations;
• The outcome of litigation or threatened litigation or regulatory actions;
• The effect of commodity pricing on overall revenues and profitability;
• Possible fluctuations in quarterly or annual results or adverse impacts on the Company’s results caused by the adoption of new accounting standards or interpretations or regulatory rules and regulations;
• The effect of weather conditions or other aspects of the forces of nature on field or facility operations;
• The effects of industry trends in the environmental services, energy and industrial services marketplaces; and
• The effects of conditions in the financial services industry on the availability of capital and financing.

Any of the above factors and numerous others not listed nor foreseen may adversely impact the Company’s financial performance. Additional information on the potential factors that could affect the Company’s actual results of operations is included in its filings with the Securities and Exchange Commission, which may be viewed on www.cleanharbors.com/investor_relations.