Company: CLH
Filing Date: 2025-04-11
Form Type: DEF 14A
Source: 0000822818-25-000011
Chunk: 66

Company: CLEAN HARBORS INC
Filing Date: 2025-04-11
Form: DEF 14A
Chunk 66
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 those measures were calculated for such fiscal year and for a broader understanding of how the Company's compensation program aligns with its compensation philosophy and objectives.

| Performance Metrics                 |
| Adjusted EBITDA                     |
| Adjusted EBITDA Margin              |
| Adjusted Free Cash Flow             |
| Adjusted Return on Invested Capital |
| Revenue                             |
| TRIR                                |

<div align='center'>52</div>

### RATIFICATION OF SELECTION OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
<div align='center'>(Proposal 3 on Proxy Form)</div>

Selection of the Company's Independent Registered Public Accountant

Under applicable law and the procedures adopted by the Company's Board, the Audit Committee is responsible for the appointment, compensation, retention and oversight of the Company's independent registered public accounting firm for each fiscal year. The Audit Committee has selected Deloitte & Touche LLP (“Deloitte”) to serve as the Company's independent registered public accounting firm for the year ending December 31, 2025. Deloitte has previously served as the Company's independent registered public accounting firm commencing with the year ended December 31, 2005. In deciding to engage Deloitte, each year the Audit Committee reviews auditor independence, qualifications, performance, and the existing commercial relationships with Deloitte. The Audit Committee decided that Deloitte has no commercial relationship with the Company that would impair its independence. The Audit Committee believes selection of Deloitte is in the best interest of the Company and its shareholders. Representatives of Deloitte are expected to participate in the annual meeting to respond to appropriate questions and have the opportunity to make a statement if they so desire.

The Audit Committee chair is directly involved in selecting the lead engagement partner to ensure that the lead engagement partner is appropriately qualified to lead the audit of Clean Harbors and adheres to the rotation requirements as required by the Securities and Exchange Committee. Throughout the year, the Audit Committee chair meets one on one with the lead engagement partner to promote candid and thorough dialogue. The Audit Committee also meets with the lead engagement partner in executive sessions of certain Audit Committee meetings to discuss the status of the audit and any other relevant matters.

The Board acknowledges that shareholder ratification of the Audit Committee's selection of the independent registered public accounting firm is not required by law; however, as has been our historical practice, the Audit Committee's selection of Deloitte as the Company's independent registered public accounting firm for the year ending December 31, 2025 is