On October 8, 2024, Clean Harbors, Inc. entered into Amendment No. 6 to the Credit Agreement, dated as of June 30, 2017, among the Company, the subsidiaries of the Company identified therein and Goldman Sachs Lending Partners LLC, as administrative agent and collateral agent, and the lenders party thereto. The Sixth Amendment (i) reduces the applicable interest rate margin for the Company?s 2021 Incremental Term Loans outstanding under the Credit Agreement for Term SOFR borrowings by eliminating the ?SOFR Adjustment?

(which previously had been 0.11448% per annum for Term SOFR Loans having an available tenor of one- month?s duration, 0.26161% per annum for Term SOFR Loan having an available tenor of three months duration, and 0.42826% per annum for Term SOFR Loans having an available tenor of six-months duration), and (ii) resets the six month soft call period for a repricing of the 2021 Incremental Term Loans. After giving effect to the repricing, the applicable interest rate margins for the 2021 Incremental Term Loans are 1.75% for Term SOFR borrowings and 0.75% for base rate borrowings. In connection with the execution of the Sixth Amendment, the Company paid certain customary fees and expenses of Goldman Sachs Lending Partners LLC, in its capacities as administrative agent, collateral agent, and lead arranger.