Clean Harbors reported the appointment of Marcy Reed to the Company's Board of Directors. Reed worked for more than 30 years for National Grid and its predecessor companies before retiring in early 2021. The appointment of Reed expands the Company's Board from nine to ten members. Reed was appointed as a Class II director whose term will expire at Clean Harbors' 2024 annual meeting of shareholders. She will serve on the Audit Committee and the Environmental, Health and Safety Committee. A certified public accountant since 1988, Reed is a qualified financial expert as defined by the Securities and Exchange Commission.