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                              SAFETY-KLEEN CORP.
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                           [SAFETY-KLEEN LETTERHEAD]


FOR IMMEDIATE RELEASE                                    Contact: Maureen Fisk
                                                                  847/468-2452


                  SAFETY-KLEEN CORP. COMMENTS ON EXTENSION OF
                     TENDER OFFER BY LAIDLAW ENVIRONMENTAL

     February 16, 1998 - Elgin, Illinois -- Safety-Kleen Corp. (SK:NYSE) today 
released the following statement from Donald W. Brinckman, Chairman and Chief 
Executive Officer, regarding the extension of Laidlaw Environmental's 
unsolicited tender offer for Safety-Kleen Corp.

     "We are not surprised by Laidlaw's announcement. We expected them to 
extend the offer, just as we expected them to try to claim some significance 
for the number of shares they claim were tendered," Brinckman stated.

     "However," Brinckman added, "it is important to put Laidlaw's announcement
into perspective. Laidlaw is not purchasing any shares since the conditions of
their offer have not been satisfied or waived. Nor does it mean that those
shareholders who tendered shares do not support SK Parent Corp.'s $27 per share
all-cash offer for Safety-Kleen. Shareholders who tender shares can also return
proxies voting in favor of the SK Parent offer at the February 25 special
meeting of shareholders."

     "As for extending the offer, if Laidlaw intends to continue its hostile
offer, it had no other choice. The Laidlaw offer is still apparently
unacceptable to a significant portion of Safety-Kleen's shareholders."

     "The Safety-Kleen Board remains convinced that SK Parent's $27 per share
all cash offer is preferable to Laidlaw's part stock/part cash offer. We once
again urge Safety-Kleen shareholders not to tender their shares to Laidlaw. To
those who may have already tendered, we strongly recommend that they withdraw
their shares now," Brinckman concluded.

     Safety-Kleen is an industrial and environmental service company dedicated 
to helping nearly 400,000 automotive and industrial businesses recycle and 
process their waste streams.
 
     
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