Exhibit 99.1

FOR IMMEDIATE RELEASE                                Media Contact: John Kyte
September 11, 2002                                               803-933-4224

SAFETY-KLEEN COMPLETES SALE OF CHEMICAL SERVICES DIVISION TO CLEAN HARBORS

Columbia, S.C. - Safety-Kleen Corp. today announced that the Company has
completed the sale of its Chemical Services Division (CSD) to Clean Harbors,
Inc. (Nasdaq: CLHB).

         "Bringing this sale to closure has been one of our primary objectives
during the past several months," said Safety-Kleen Chairman, CEO and President
Ronald A. Rittenmeyer. "Completing this transaction represents a significant
step forward in our plans to emerge from bankruptcy by the end of this year, and
that is clearly in the best interests of our stakeholders, customers and
employees."

         "With the sale now complete, we can focus exclusively on Safety-Kleen's
core business in the parts washer and waste management services industry,"
Rittenmeyer said, "and our former CSD customers know they will be working with
an established industry leader that puts customer service and environmental
protection first."

About Safety-Kleen Corp.
Safety-Kleen Corp. is the leading industrial waste management company in North
America, serving customers in the United States, Canada, Mexico and Puerto Rico.
Safety-Kleen Corp. is currently under Chapter 11 bankruptcy protection, which it
entered into voluntarily on June 9, 2000.

About Clean Harbors, Inc.
Clean Harbors, Inc., through its subsidiaries, provides a wide range of
environmental and waste management services to a diversified customer base
including a majority of the Fortune 500 companies, thousands of smaller private
entities and numerous governmental agencies. For more information, visit the
Clean Harbors Web site at www.cleanharbors.com.

Private Securities Litigation Reform Act
Sections of this release constitute forward-looking statements that involve a
number of risks and uncertainties. Many factors could cause actual results to
differ materially from our expected results. These factors include risks
associated with the final acquisition of the Chemical Services Division;
emergence from Chapter 11 bankruptcy protection; continued productive relations
with creditors; the continued availability of credit; changes in demand for the
Company's services; and competition.