Fourth Quarter and Full-Year 2021 Investor Review February 23, 2022 1 40 YEARS OF SUSTAINABILITY IN ACTION Forward Looking Statements and GAAP Disclaimer These slides contain (and the accompanying oral discussion will contain) forward-looking statements, which are generally identifiable by use of the words "believes," "expects," "intends," "anticipates," "plans to," "seeks," "should," "estimates," "projects," "may," "likely" or similar expressions. Such statements may include, but are not limited to, statem ...

Table Of Contents Common Stock, $0.01 par value CLH New York Stock Exchange UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ___________________________________________________________________________________________________________ FORM 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE FISCAL YEAR ENDED DECEMBER 31, 2021 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 COMMISSION FILE NO. 0 ...

24th Annual Needham Growth Conference January 11, 2022 40 YEARS OF SUSTAINABILITY IN ACTION 1 Forward Looking Statements and GAAP Disclaimer These slides contain (and the accompanying oral discussion will contain) forward-looking statements, which are generally identifiable by use of the words "believes," "expects," "intends," "anticipates," "plans to," "seeks," "should," "estimates," "projects," "may," "likely" or similar expressions. Such statements may include, but are not limited to, statements about fu ...

Company Overview - Clean Harbors is a market leader in hazardous waste disposal and recycling with high barriers to entry and growth potential beyond GDP[5] - The company owns more than 500 hard-to-replicate permits and operates 100+ waste management facilities[5] - Clean Harbors serves 300,000+ customers with 19,000+ employees across ~700 service locations[5] Market and Strategy - Clean Harbors targets large market opportunities including Hazardous Waste Management ($11 billion), Remediation & Industrial Services ($14 billion), and the U S Lubricants Industry ($15 billion)[9] - The company's growth strategies include expanding offerings and geographic coverage, executing cost, pricing, and productivity initiatives, pursuing acquisitions and divestitures, adding network capacity, and cross-selling across businesses[18] - Clean Harbors acquired HydroChemPSC (HPC) in an all-cash transaction for $125 billion, expecting $40 million+ of synergies after the first full year of operation[19] Financial Performance - In Q3 2021, Clean Harbors reported revenue of $9515 million, a 22% increase year-over-year (YoY)[23] - Q3 2021 adjusted EBITDA increased 10% to $1851 million with an adjusted EBITDA margin of 195%[23] - The company's adjusted free cash flow was $611 million in Q3 2021 and is on track to hit its annual target[23]

BofA Securities Leveraged Finance Conference 2021 1 November 30, 2021 40 YEARS OF SUSTAINABILITY IN ACTION Forward Looking Statements and GAAP Disclaimer These slides contain (and the accompanying oral discussion will contain) forward-looking statements, which are generally identifiable by use of the words "believes," "expects," "intends," "anticipates," "plans to," "seeks," "should," "estimates," "projects," "may," "likely" or similar expressions. Such statements may include, but are not limited to, statem ...

Third Quarter 2021 Investor Review November 3, 2021 1 40 YEARS OF SUSTAINABILITY IN ACTION Forward Looking Statements and GAAP Disclaimer These slides contain (and the accompanying oral discussion will contain) forward-looking statements, which are generally identifiable by use of the words "believes," "expects," "intends," "anticipates," "plans to," "seeks," "should," "estimates," "projects," "may," "likely" or similar expressions. Such statements may include, but are not limited to, statements about futur ...

Financial Data and Key Metrics Changes - Revenue increased by 22% in Q3 2021, driven by over $75 million growth in each segment, with almost all growth being organic [28] - Adjusted EBITDA grew 10% year-over-year, reaching $185.1 million, with a strong EBITDA margin of 19.5% [29] - Adjusted free cash flow for Q3 was $61.1 million, with expectations for full-year adjusted free cash flow in the range of $310 million to $330 million [33][39] Business Line Data and Key Metrics Changes - Environmental Services revenue grew by 15%, driven by favorable mix and pricing in the disposal network, with industrial services growing by 24% [10] - Safety-Kleen Sustainability Solutions (SKSS) revenue surged by 60% to nearly $206 million, with adjusted EBITDA increasing by over $41 million year-over-year [17] - Average incineration price increased by 18% year-over-year, with a notable 11% increase in U.S. incinerators [14] Market Data and Key Metrics Changes - Incineration utilization was at 82%, up from the previous year, with deferred revenue reaching a record high of $86.6 million [13] - Landfill volumes declined by 5%, but average pricing per ton increased by 17% [16] - Waste oil collections exceeded 60 million gallons for the first time since the pandemic began [18] Company Strategy and Development Direction - The company completed the acquisition of HydroChemPSC, expecting at least $40 million in synergies after the first full year of operation [19] - Continued investment in capital expenditures, particularly in disposal, with plans for a new incinerator in Kimball, Nebraska [21][22] - The company is focusing on aggressive pricing initiatives across all business lines to offset rising costs [44] Management's Comments on Operating Environment and Future Outlook - Management acknowledged economic headwinds, including higher supply chain, labor, and transportation costs, but expressed confidence in the company's ability to address these challenges through pricing and cost mitigation strategies [9][26] - The company is optimistic about closing out 2021 strongly and expects to perform well in Q4 and into 2022, driven by market demand [24][26] Other Important Information - Government assistance programs in the Environmental Services segment decreased significantly, from $11.2 million in Q3 2020 to $1.1 million in Q3 2021 [12] - The company is evaluating opportunities for debt reduction following the acquisition of HydroChemPSC [23] Q&A Session Summary Question: Can you discuss the acceleration of pricing initiatives? - Management indicated that pricing needs to come from all business lines, with transportation costs being a significant challenge [43][44] Question: What is the expected pricing cadence for incineration? - Incineration pricing in Q3 was up 11%, with expectations for continued price expansion as contracts come up for renewal [51] Question: How is the integration of HydroChem going? - The integration is proceeding smoothly, with a focus on rationalizing contracts and leveraging synergies [49] Question: What are the expectations for re-refining margins post-IMO 2020? - Management anticipates that while base oil pricing may decline, effective spread management will help maintain profitability [55] Question: What are the labor challenges and how is the company addressing them? - The company is actively recruiting from various sources, including military personnel, and is focused on training and onboarding to fill open positions [72] Question: What is the status of the Vertex Energy acquisition? - The company is responding to a second request from the Federal Trade Commission and continues to operate as a standalone entity until the acquisition closes [96]

Table of Contents Title of each class Trading Symbol Name of each exchange on which registered Common Stock, $0.01 par value CLH New York Stock Exchange UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 _______________________ FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED SEPTEMBER 30, 2021 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION ...

Clean Harbors Inc. (NYSE:CLH) Q2 2021 Earnings Conference Call August 4, 2021 9:00 AM ET Company Participants Michael McDonald - General Counsel Alan McKim - Chairman, President and Chief Executive Officer Mike Battles - Executive VP and CFO Conference Call Participants Tyler Brown - Raymond James Noah Kaye - Oppenheimer Michael Hoffman - Stifel Ryan Gunning - Jefferies Jeff Silber - BMO Capital Markets Adam Bubes - Goldman Sachs Larry Solow - CJS Securities David Manthey - Baird Jim Ricchiuti - Needham Al ...

Second Quarter 2021 Investor Review August 4, 2021 1 40 YEARS OF SUSTAINABILITY IN ACTION Forward Looking Statements and GAAP Disclaimer These slides contain (and the accompanying oral discussion will contain) forward-looking statements, which are generally identifiable by use of the words "believes," "expects," "intends," "anticipates," "plans to," "seeks," "should," "estimates," "projects," "may," "likely" or similar expressions. Such statements may include, but are not limited to, statements about future ...