Clean Harbors' Chairman and CEO Participates in CBS's Emmy Award-Winning Series "Undercover Boss"

Clean Harbors, Inc. ("Clean Harbors") (NYSE: CLH), the leading provider of environmental, energy and industrial services throughout North America, today announced that CEO and founder Alan S. McKim will be featured on CBS's Emmy award-winning reality television series "Undercover Boss," on Wednesday, January 29, 2020, at 8 p.m. Eastern/Pacific times and 7 p.m. Central time. During the one-hour episode, a disguised McKim works as a peer alongside employees at facilities and locations in Indiana, Massachusetts, New York and Texas.

"Participating in ?Undercover Boss' gave me the opportunity to revisit my roots and see the company from the front lines again," said McKim, who founded Clean Harbors in 1980. "I was able to engage directly with our employees, see firsthand what was happening inside the company and gain insights into our business from a unique perspective."

Posing as a former mechanic looking to restart his career later in life, McKim tried his hand at multiple roles within Clean Harbors' facilities and job sites in Braintree, Mass., New York City, Plainfield, New Jersey, East Chicago, Indiana and Matagorda Island in Texas. He worked as a Class A truck driver, a hazardous waste specialist, an industrial technician doing confined space enclosure work and a field service worker responding to a hurricane-related disaster.

"It was rewarding to work alongside talented employees who do these challenging jobs every day," McKim said. "The nature of our business requires difficult and potentially dangerous work, so I was proud to see our comprehensive safety training and protocols in action. Safety is our company's number one core value. Our highest daily priority in handling North America's hazardous waste and responding to releases into the environment is keeping our people, our customers and our nation's communities safe." McKim himself went through the company's industry-leading training programs in preparation for the jobs he completed on the show.

Participation in the show coincides with the 40th anniversary of the company McKim began in Massachusetts as a four-person tank cleaning business in 1980. Today, Clean Harbors is a publicly traded company with more than 15,000 employees across North America and generates more than $3 billion in annual revenue.

To learn more about McKim's journey, hear the stories of the employees he met, and discover more about Clean Harbors, tune in to the company's episode Wednesday, January 29 on CBS.

About Clean Harbors
Clean Harbors (NYSE: CLH) is North America's leading provider of environmental, energy and industrial services. The Company serves a diverse customer base, including a majority of Fortune 500 companies. Its customer base spans a number of industries, including chemical, energy and manufacturing, as well as numerous government agencies. These customers rely on Clean Harbors to deliver a broad range of services such as end-to-end hazardous waste management, emergency spill response, industrial cleaning and maintenance, and recycling services. Through its Safety-Kleen subsidiary, Clean Harbors also is North America's largest re-refiner and recycler of used oil and a leading provider of parts washers and environmental services to commercial, industrial and automotive customers. Founded in 1980 and based in Massachusetts, Clean Harbors operates throughout the United States, Canada, Mexico and Puerto Rico. For more information, visit www.cleanharbors.com.