FOR FURTHER INFORMATION                                    FOR IMMEDIATE RELEASE
CONTACT:
Frank J.M. ten Brink  847-607-2012

Conference call to be held June 11th at 9:00 am. Central time - dial in number
is 866-256-3815. Replay is available after the call through June 18th at
888-266-2081 access code 490226.

            STERICYCLE ANNOUNCES FIRST ACQUISITION IN UNITED KINGDOM;
                   PURCHASES WHITE ROSE ENVIRONMENTAL LIMITED

Lake Forest, Illinois, June 10, 2004 -- Stericycle, Inc. (NASDAQ: SRCL), the
United States' leading provider of medical waste management and compliance
services for the healthcare community, today announced that it had completed the
acquisition of White Rose Environmental Limited, a leading provider of medical
waste management services in the United Kingdom, for approximately $52.3 million
in cash and $11.5 million in notes.

White Rose Environmental Limited is headquartered in Leeds, United Kingdom and
provides medical waste management services to customers in England and Wales.
The acquisition is expected to add approximately $28 million to this year's
revenues, and be approximately $0.02 accretive to earnings per share in 2004,
above the $1.70-$1.75 EPS guidance previously provided in the open
teleconference on April 28, 2004. In the last fiscal year, White Rose had
revenues of approximately $49 million.

Mark C. Miller, Stericycle's President and CEO, said, "The acquisition of White
Rose Environmental Limited provides Stericycle with a significant presence in
the United Kingdom. The completion of this acquisition represents an important
step forward in our strategy of developing and expanding our international
presence."

Andy Hinton, Chairman of the Board of Directors of White Rose Environmental
Limited said, "We are pleased to have Stericycle, a well recognized leader in
our industry, as the new owner for our employees, customers and suppliers."

Stericycle provides medical waste collection, transportation, treatment and
disposal services and safety and compliance programs to healthcare companies
nationwide, including hospitals, physician and dental offices, laboratories and
clinics. Medical waste includes single-use disposables such as needles,
syringes, gloves and other supplies that have been in contact with blood or
other bodily fluids, as well as blood, blood products and other items that could
harbor infectious agents.

SAFE HARBOR STATEMENT: Statements in this press release may contain
forward-looking statements that involve risks and uncertainties, some of which
are beyond Stericycle's control (for example, general economic conditions). Our
actual results could differ significantly from the results described in the
forward-looking statements. Factors that could cause such differences include
difficulties in completing the integration of acquired businesses, changes in



governmental regulation of medical waste collection and treatment, and increases
in transportation and other operating costs, as well as the various other
factors identified in our filings with the U.S. Securities and Exchange
Commission. As a result, past financial performance should not be considered a
reliable indicator of future performance, and investors should not use
historical trends to anticipate future results or trends. We make no commitment
to disclose any subsequent revisions to forward-looking statements.

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