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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                                        
                                  SCHEDULE 13D
                                        
                   Under the Securities Exchange Act of 1934
                                        
                             (Amendment No. ___ )*
                                        
                      3CI COMPLETE COMPLIANCE CORPORATION
                                (Name of Issuer)
                                        
                     Common Stock, par value $.01 per share
                         (Title of Class of Securities)
                                        
                                  88553J-l0-4
                                 (CUSIP Number)

                               Mr. Mark C. Miller
                     President and Chief Executive Officer
                                Stericycle, Inc.
                         1419 Lake Cook Road, Suite 410
                           Deerfield, Illinois 60015
                                 (847) 945-6550

            (Name, Address and Telephone Number of Person Authorized
                     To Receive Notices and Communications)
                                        
                                October 1, 1998
            (Date of Event Which Requires Filing of This Statement)

If the filing person has previously filed a statement on Schedule 13G to report
the acquisition that is the subject of this Schedule 13D, and is filing this
schedule because of ss. 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the
following box. [ ]

* The remainder of this cover page shall be filled out for a reporting
  person's initial filing on this form with respect to the subject class of
  securities, and for any subsequent amendment containing information which
  would alter disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed
to be filed for purposes of section 18 of the Securities Exchange Act of 1934
(the "Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).

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                            CUSIP No. 88553J-10-4
- --------------------------------------------------------------------------------
                                                         
(1)      Name of reporting person ............................ Stericycle, Inc.
         I.R.S. identification nos. of above persons..........       36-3640402
- --------------------------------------------------------------------------------
(2)      Check the appropriate box if a member of a group ....        (a) [   ]
                                                                      (b) [   ]
- --------------------------------------------------------------------------------
(3)      SEC use only ........................................ 
- --------------------------------------------------------------------------------
(4)      Source of funds .....................................               BK
- --------------------------------------------------------------------------------
(5)      Check if disclosure of legal proceedings is required  
         pursuant to Items 2(d) or 2(e) ......................            [   ]
- --------------------------------------------------------------------------------
(6)      Citizenship or place or organization ................         Delaware
- --------------------------------------------------------------------------------
Number of shares beneficially owned by each reporting person   
with:                                                          
(7)      Sole voting power ...................................        5,104,448
(8)      Shared voting power .................................              -0- 
(9)      Sole dispositive power ..............................        5,104,448
(10)     Shared dispositive power ............................              -0-
- --------------------------------------------------------------------------------
(11)     Aggregate amount beneficially owned by each reporting 
         person ..............................................        5,104,448
- --------------------------------------------------------------------------------
(12)     Check if the aggregate amount in Row (11) excludes    
         certain shares  .....................................            [   ]
- --------------------------------------------------------------------------------
(13)     Percent of class represented by amount in Row (11) ..            52.2%
- --------------------------------------------------------------------------------
(14)     Type of reporting person                                            CO
- --------------------------------------------------------------------------------

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ITEM 1.  SECURITY AND ISSUER

         This Statement relates to shares of Common Stock, par value $.01 per
share ("3CI Common Stock"), of 3CI Complete Compliance Corporation, a Delaware
corporation ("3CI"). The principal executive offices of 3CI are located at 910
Pierremont, Suite 312, Shreveport, Louisiana 71106.

ITEM 2.  IDENTITY AND BACKGROUND

         This Statement is being filed by Stericycle, Inc., a Delaware
corporation ("Stericycle"). Stericycle's principal executive offices are located
at 1419 Lake Cook Road, Suite 410, Deerfield Illinois 60015.

         Stericycle is the second largest provider of regulated medical waste
management services in the United States, providing regulated medical waste
collection, transportation, treatment and disposal services to over 45,000
customers in 33 states and the District of Columbia.

         Schedule A to this Statement sets forth the name, residence or business
address, principal occupation or employment, and name, business and address of
his or her employer, of each of Stericycle's executive officers and directors as
of the date of this Statement.

         During the last five years, neither Stericycle nor, to its knowledge,
any of its executive officers or directors has been convicted in a criminal
proceeding (excluding traffic violations or similar misdemeanors) or was a party
to a civil proceeding of a judicial or administrative body of competent
jurisdiction and as a result of such proceeding was or is subject to a judgment,
decree or final order enjoining future violations of, or prohibiting or
mandating activities subject to, federal or state securities laws, or finding
any violation with respect to such laws.

ITEM 3.  SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION

         Stericycle indirectly acquired all 5,104,448 shares of 3CI Common Stock
whose beneficial ownership is being reported on this Statement (the "3CI
Shares") by purchasing all of the issued and outstanding capital stock of Waste
Services, Inc., a Delaware corporation ("WSI"), from WSI's two stockholders,
Rethmann GmbH & Co. Verwaltungs-und Beteiligungs-KG and Lobbe Holding GmbH & Co.
The purchase price was (i) $10,000,000 in cash and (ii) the grant of certain
exclusive negotiation and first refusal rights in respect of the purchase, for
installation and operation in the Federal Republic of Germany, of medical waste
treatment units incorporating Stericycle's proprietary electro-thermal
deactivation technology.

         The source of the funds that Stericycle used to pay the cash component
of the purchase price was a $20,000,000 credit facility that Stericycle
established at LaSalle National Bank, 135 South LaSalle Street, Chicago,
Illinois 60603, under a credit 

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agreement entered into by Stericycle, certain of its subsidiaries, and LaSalle
National Bank, for itself and as agent for the lenders who may become
signatories or parties to the credit agreement (as such agent, the "Bank").
(LaSalle National Bank, a national banking association, is currently the only
lender signatory or party to the credit agreement.) As security for Stericycle's
obligations under the credit agreement, Stericycle granted the Bank a security
interest in all of its tangible and intangible assets and pledged to the Bank
all of the capital stock of its subsidiaries.

         Effective as of the closing as of October 1, 1998 of Stericycle's
purchase of all of the capital stock of WSI, WSI joined in the credit agreement
in accordance with its terms, which require any new subsidiary of Stericycle to
become bound by the credit agreement and all of the related loan documents. In
this connection, and as required under the terms of the credit agreement,
Stericycle pledged all of the capital stock of WSI to the Bank; and WSI granted
the Bank a security interest in all of its tangible and intangible assets and
also pledged to the Bank all of the 3CI Shares and all of the shares of 3CI
preferred stock and the amended and restated note from 3CI described in Item 6.

ITEM 4.  PURPOSE OF TRANSACTION

         WSI owns a majority of the outstanding shares of 3CI Common Stock (as
well as all of 3CI's outstanding shares of preferred stock and an amended and
restated note from 3CI in the principal amount of approximately $5,487,000).
Stericycle purchased all of the capital stock of WSI for the purpose of becoming
the indirect beneficial owner of these shares and thus 3CI's controlling
stockholder.

         Effective as of the closing as of October 1, 1998 of Stericycle's
purchase of all of the capital stock of WSI, and in accordance with the terms of
the stock purchase agreement between Stericycle and the stockholders of WSI, the
three directors of 3CI serving as nominees of WSI (Dr. Werner Kook, Jurgen
Thomas and Dr. Clemens Pues) resigned as directors of 3CI. Pursuant to
applicable provisions of the Delaware General Corporation Law and 3CI's by-laws,
WSI, as 3CI's majority stockholder, then amended 3CI's by-laws to increase the
number of directors of 3CI from six to seven, and elected the following persons
to fill the four vacancies arising by reason of the resignation of three
incumbent directors and the increase in the number of directors: Jack W.
Schuler; Mark C. Miller; Anthony J. Tomasello; and Frank J.M. ten Brink.

         Mr. Schuler is Chairman of the Board of Directors of Stericycle; Mr.
Miller is Stericycle's President and Chief Executive Officer and a director; Mr.
Tomasello is Stericycle's Vice President, Operations; and Mr. ten Brink is
Stericycle's Vice President, Finance, and Chief Financial Officer. Messrs.
Miller and ten Brink serve as the two directors of WSI, and Mr. Miller serves as
its President and Mr. ten brink as its Secretary.

         In accordance with Rule 14f-1 under the Securities and Exchange Act of
1934, 

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the election of Messrs. Schuler, Miller, Tomasello and ten Brink as directors of
3CI will not be or become effective until 10 days after 3CI files with the
Securities and Exchange Commission, and transmits to all stockholders of record
who would be entitled to vote at a meeting of stockholders for the election of
directors, the information statement required to be filed and transmitted by
Rule 14f-1.

         Depending upon market conditions and other factors, in the future
Stericycle may consider the direct or indirect purchase of additional shares of
3CI Common Stock or other securities of 3CI, either in the open market, in
privately negotiated transactions or otherwise. At present, however, Stericycle
has no plans or proposals for any such purchases. Nor, at present, does
Stericycle have any plans or proposals that relate to or would result in: (i) an
extraordinary have any corporate transaction involving 3CI or any subsidiary of
3CI; (ii) a sale or transfer of any of 3CI's assets; (iii) a change in the
present board of directors or management of 3CI (other than the change in
directors described in this Item 4); (iv) a change in the present capitalization
or dividend policy of 3CI; (v) any other change in 3CI's business or corporate
structure; (vi) a change in 3CI's certificate of incorporation or by-laws (other
than the change in 3CI's by-laws described in this Item 4); or (vii) the
delisting or deregistration of any of 3CI's securities.

ITEM 5.  INTEREST IN SECURITIES OF THE ISSUER

         Stericycle, through its wholly-owned subsidiary WSI, beneficially owns
5,104,448 shares of 3CI Common Stock (as previously defined, the "3CI Shares").
The 3CI Shares represent 52.2% of the 9,778,825 shares of 3CI Common Stock which
were outstanding as of August 14, 1998 (according to 3CI's quarterly report on
Form 10-Q for the quarter ended June 30, 1998). Stericycle, through WSI, has the
sole power to vote or to direct the vote of, and the sole power to dispose or to
direct the disposition of, all of the 3CI Shares.

         None of the executive officers or directors of Stericycle named in the
attached Schedule A beneficially owns any shares of 3CI Common Stock.

         As described in Item 2, Stericycle indirectly acquired the 3CI Shares
through its purchase of all of the capital stock of WSI pursuant to a stock
purchase agreement, dated as of September 3, 1998, entered into by Stericycle
and WSI's two stockholders, Rethmann GmbH & Co. Verwaltungs-und Beteiligungs-KG
and Lobbe Holding GmbH & Co. The purchase price was (i) $10,000,000 in cash and
(ii) the grant of certain exclusive negotiation and first refusal rights in
respect of the purchase, for installation and operation in the Federal Republic
of Germany, of medical waste treatment units incorporating Stericycle's
proprietary electro-thermal deactivation technology. The transaction closed as
of October 1, 1998.

         WSI also owns (and by acquiring all of the capital stock of WSI,
Stericycle indirectly acquired) all of 3CI's outstanding preferred stock,
consisting of 7,000,000 shares of 3CI's preferred stock designated as Series B
Preferred Stock and 750,000 

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shares of 3CI's preferred Stock designated as Series C Preferred Stock. In
addition, WSI owns (and by acquiring all of the capital stock of WSI, Stericycle
indirectly acquired) a secured promissory note from 3CI which, as amended and
restated as of September 30, 1998, is payable to WSI in the principal amount of
approximately $5,487,000 on or before September 30, 1999.

         Except for the transaction by which Stericycle acquired all of the
capital stock of WSI, neither Stericycle nor any of the executive officers or
directors of Stericycle named in the attached Schedule A has effected any
transaction in 3CI Common Stock during the past 60 days.

ITEM 6.  CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR RELATIONSHIPS WITH 
         RESPECT TO SECURITIES OF THE ISSUER

         Except as described in Items 4 and 5, there are no contracts,
arrangements, understandings or relationships (legal or otherwise) among
Stericycle and any of the executive officers or directors of Stericycle named in
the attached Schedule A, or between any one or more of them and any other
person, in respect of 3CI Common Stock or any other securities of 3CI.

ITEM 7.  MATERIAL TO BE FILED AS EXHIBITS

Exhibit 99.1 Stock Purchase Agreement, dated as of September 3, 1998, entered
             into by Stericycle, Inc., and Rethmann GmbH & Co. Verwaltungs-und
             Beteiligungs-KG and Lobbe Holding GmbH & Co.

Exhibit 99.2 Credit Agreement, dated as of September 30, 1998, by and among
             LaSalle National Bank, as agent, the lenders signatories or parties
             to the Credit Agreement, and Stericycle, Inc. and certain of its
             subsidiaries

                                   SIGNATURE

         After reasonable inquiry and to the best knowledge and belief of the
undersigned, the undersigned certifies that the information set forth in this
Statement is true, complete and correct.

         Dated:   October 9, 1998.
                                         
                                     STERICYCLE, INC.

                                     By /s/ Mark C. Miller
                                       ----------------------------------------
                                          Mark C. Miller
                                          President and Chief Executive Officer

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                                  SCHEDULE A

- -------------------------------------------------------------------------------
                   EXECUTIVE OFFICERS OF STERICYCLE, INC.(1)
- -------------------------------------------------------------------------------
NAME                       TITLE
- -------------------------------------------------------------------------------
                        
Mark C. Miller             President and Chief Executive Officer
- -------------------------------------------------------------------------------
Anthony J. Tomasello       Vice President, Operations
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Linda D. Lee               Vice President, Regulatory Affairs and Quality
                           Assurance
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Frank J.M. ten Brink       Vice President, Finance and Chief Financial Officer
- -------------------------------------------------------------------------------
Michael J. Bernert         Vice President, Eastern Region
- -------------------------------------------------------------------------------
Joel P. Wilson             Vice President, Central Region
- -------------------------------------------------------------------------------

(1) All executive officers are United States citizens.  Each executive
officer's present principal occupation is the same as his or her position with
Stericycle, Inc.

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                        DIRECTORS OF STERICYCLE, INC.(1)
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NAME                      PRINCIPAL OCCUPATION
- -------------------------------------------------------------------------------
Jack W. Schuler           Partner
Chairman of the Board     Crabtree Partners LLC
                          [a private investment firm]
                          1419 Lake Cook Road
                          Suite 410
                          Deerfield, Illinois 60015
- -------------------------------------------------------------------------------
Mark C. Miller            President and Chief Executive Officer
                          Stericycle, Inc.
                          1419 Lake Cook Road
                          Suite 410
                          Deerfield, Illinois 60015
- -------------------------------------------------------------------------------
Rodney F. Dammeyer        Managing Partner
                          Equity Group Investments, Inc.
                          [a private investment firm]
                          2 North Riverside Plaza
                          Chicago, Illinois 60606
- -------------------------------------------------------------------------------
Patrick F. Graham         President and Chief Executive Officer
                          WorldCorp, Inc.
                          [air transportation services]
                          13873 Park Center Road
                          Herndon, Virginia 22071
- -------------------------------------------------------------------------------

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- -------------------------------------------------------------------------------
                        
John Patience              Partner
                           Crabtree Partners LLC
                           [a private investment firm]
                           1419 Lake Cook Road
                           Suite 410
                           Deerfield, Illinois 60015
- -------------------------------------------------------------------------------
Peter Vardy                Managing Director
                           Peter Vardy & Associates
                           [an environmental consulting firm]
                           333 West Wacker Drive
                           Suite 700
                           Chicago, Illinois 60606
- -------------------------------------------------------------------------------
L. John Wilkerson, Ph.D.   Chief Executive Officer
                           The Wilkerson Group, Inc.
                           [a health care products consulting firm]
                           666 Third Avenue
                           New York, New York 10017
- -------------------------------------------------------------------------------

1  All directors are United States citizens.

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                            STOCK PURCHASE AGREEMENT              EXHIBIT 99.1

     This Agreement is entered into as of September 3, 1998 by Stericycle, Inc.,
a Delaware corporation with its principal executive offices at 1419 Lake Cook
Road, Suite 410, Deerfield, Illinois ("Stericycle"), and Rethmann GmbH & Co.
Verwaltungs-und Beteiligungs-KG, a German KG with its principal executive
offices at Werner Strasse 95, D-59379 Selm, Germany ("Rethmann") and Lobbe
Holding GmbH & Co., a German KG with its principal executive offices at
Bernhard-Hulsmann-Weg 2, D-58644 Iserlohn, Germany ("Lobbe") (Rethmann and Lobbe
together, "Sellers").

                                   Background

     A. Sellers own all of the issued and outstanding shares of stock of Waste
Systems, Inc., a Delaware corporation with its principal executive offices at
910 Pierremont, Suite 312, Shreveport, Louisiana 71106 ("WSI"), consisting of
100 shares of common stock, no par value (the "WSI Shares")

     B. WSI is the majority stockholder of 3CI Complete Compliance Corporation,
a Delaware corporation with its principal executive offices also at 910
Pierremont, Suite 312, Shreveport, Louisiana 71106 ("3CI").

     C. WSI owns 5,104,448 shares of 3CI's common stock, par value $.01 per
share (the "3CI Common Stock"), representing 52.2% of the 9,778,825 shares of
3CI's common stock issued and outstanding as of July 24, 1998.

     D. WSI owns 7,750,000 shares of 3CI's preferred stock (the "3CI Preferred
Stock"), consisting of 7,000,000 shares of 3CI's preferred stock designated as
Series B Preferred Stock and 750,000 shares of 3CI's preferred Stock designated
as Series C Preferred Stock.

     E. WSI has made various interest-bearing loans and non-interest bearing
cash advances to 3CI which, as consolidated, reduced, modified and extended, are
evidenced by a Revolving Promissory Note dated September 30, 1995, from 3CI to
WSI, as amended (as amended, the "3CI Note") in the original principal amount of
$8,000,000. The 3CI Note was originally due on December 31, 1996, but 3CI has
requested and WSI has granted extensions of the maturity date, and the 3CI Note
is now due on September 30, 1998. The principal balance of the 3CI Note as of
June 30, 1998, as recorded on 3CI's books, was $4,898,699.

     F. WSI has an account receivable from 3CI (the "3CI Receivable") with a
balance as of July 31, 1998, as recorded on 3CI's books, of $466,906.

     G. Stericycle desires to purchase all of the WSI Shares from Sellers, and 

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Sellers desire to sell all of the WSI Shares to Stericycle, upon the terms and
subject to the conditions of this Agreement.

     Now, therefore, in consideration of their mutual promises and intending to
be legally bound, the parties agree as follows:

                                   ARTICLE 1

                                  DEFINITIONS

     Certain capitalized terms used in this Agreement have been defined in the
preceding provisions, and their definitions are incorporated by reference. In
addition, the following terms have these meanings::

     CLOSING is defined in Section 3.1.

     CLOSING DATE means the date that Closing occurs.

     CLOSING DOCUMENTS means, in respect of a Party, the documents, instruments
and agreements that it is required to execute, deliver and perform at Closing
pursuant to the terms of this Agreement.

     CONSENT means any approval, consent, ratification, waiver or other
authorization.

     CONTEMPLATED TRANSACTION means the transactions contemplated by this
Agreement, i.e., (i) Stericycle's purchase of the WSI Shares from Sellers and
Sellers' sale of the WSI Shares to Stericycle and (ii) the Parties' execution,
delivery and performance of their respective Closing Documents.

     CONTRACT means any legally binding contract, agreement, obligation, promise
or undertaking (whether written or oral, and whether express or implied).

     EXCHANGE ACT means the Securities Exchange Act of 1934, as amended, and the
related rules and regulations issued by the SEC.

     EXCLUSIVE NEGOTIATION AND FIRST REFUSAL RIGHTS means the rights, for a
period of 60 days after the Closing Date:

                (a) to negotiate with Stericycle, on an exclusive basis, to
         purchase one or more regulated medical waste treatment units utilizing
         Stericycle's proprietary electro-thermal-deactivation technology for
         installation and operation in Germany; and

                (b) to match (i.e., a right of first refusal in respect of) any
         reasonable proposal to purchase one or more regulated medical waste
         treatment units 

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     utilizing Stericycle's proprietary electro-thermal-deactivation technology,
     for installation and operation in Germany, that Stericycle may receive from
     any Person with whom it negotiated or had discussions prior to the date of
     this Agreement.

     GOVERNMENTAL BODY means (i) any federal, state, local, municipal, foreign
or other government and (ii) any governmental or quasi-governmental body of any
kind (including any administrative or regulatory agency, department, branch,
commission or other entity).

     KNOWLEDGE means actual knowledge of a particular fact or other matter.

     LAW means any law, ordinance, code, regulation or rule of any Governmental
Body or any principle or rule of common law.

     LIABILITY means any liability or obligation, whether known or unknown,
absolute or contingent, liquidated or unliquidated, or due or to become due.

     LISTED AGREEMENT means a Contract listed on the attached EXHIBIT A. The
term "Listed Agreement" does not include:

         (a)   any amendment, modification, supplement or extension of any
     Contract listed on the attached EXHIBIT A; or

         (b) any attachment, schedule or exhibit to any Contract listed on the
     attached EXHIBIT A; or

         (c) any document, agreement or other instrument incorporated by
     reference in or otherwise referred to by any Contract listed on the
     attached EXHIBIT A.

     LIEN means any lien, security interest, claim, community property interest,
equitable interest, option, pledge, right of first refusal or other encumbrance
or restriction of any kind, including any restriction on use, voting, transfer,
receipt of income or exercise of any other attribute of ownership.

     MATERIAL ADVERSE EFFECT means, in respect of a Party or 3CI, an event or
condition that causes a material adverse effect on its business, financial
condition, results of operations or prospects, as the case may be, taken as a
whole.

     NOTICE means any notice, demand, charge, complaint or other communication
from any Person.

     ORDER means any order, judgment, decree, ruling, consent decree, settlement
agreement, stipulation, injunction or subpoena entered or issued by any court,
Governmental Body or arbitrator.

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     ORDINARY COURSE OF BUSINESS means, in respect of WSI or 3CI, an action
taken by it which (i) is consistent with the its past practices and is taken in
the ordinary course of normal day-to-day operations and (ii) is not required by
applicable Law or its Organizational Documents to be authorized by its board of
directors or stockholders.

     ORGANIZATIONAL DOCUMENTS means, in respect of a Party, WSI or 3CI, its
certificate of incorporation and by-laws or other governing documents, each as
amended to date.

     OTHER 3CI INTERESTS means, exclusive of the 3CI Common Stock, 3CI Preferred
Stock, 3CI Note and 3CI Receivable, (i) all of WSI's other interests, if any, in
or relating to 3CI (including, but not limited to, any security interest in or
mortgage on 3CI's assets granted by 3CI as security for its payment of the 3CI
Note or 3CI Receivable (or both)), (ii) all of WSI's claims, rights and causes
of action of any kind against 3CI and (iii) all of WSI's rights arising from or
in respect of its ownership of the 3CI Common Stock, 3CI Preferred Stock, 3CI
Note or 3CI Receivable (for example, antidilution rights under any settlement
agreement or other Contract).

     PARTY means Stericycle or either Seller, and PARTIES means Stericycle and
Sellers.

     PERMIT means any approval, consent, license, permit, registration,
certificate, waiver or other authorization issued, granted or otherwise made
available by any Governmental Body.

     PERSON means any individual, corporation, general or limited partnership,
limited liability company, joint venture, association, organization, estate,
trust or other entity or any Governmental Body.

     PURCHASE PRICE is defined in Section 2.1.

     SEC means the U.S. Securities and Exchange Commission.

     SECURITIES ACT means the Securities Act of 1933, as amended, and the
related rules and regulations issued by the SEC.

     SUIT means any action, suit, proceeding, arbitration, audit, hearing or
investigation (whether civil, criminal, administrative or investigative in
nature, and whether formal or informal) by, before or in any court, Governmental
Body or arbitrator.

     THREATENED means, in respect of a Suit, that Notice has been given, or
another event has occurred or any other circumstance exists, that would lead a
prudent individual to conclude that the Suit is likely to be initiated or
otherwise pursued in the future.

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     3CI INTERESTS means the 3CI Common Stock, 3CI Preferred Stock, 3CI Note,
3CI Receivable and Other 3CI Interests.

     3CI SECURITIES FILINGS is defined in Section 4.8.

                                   ARTICLE 2

                                 PURCHASE PRICE

     2.1 PURCHASE PRICE. At Closing, Sellers shall sell and transfer the WSI
Shares to Stericycle, and Stericycle shall purchase the WSI Shares from Sellers
on the terms and subject to the conditions of this Agreement. The purchase price
for the WSI Shares (the "Purchase Price") shall be (i) $10,000,000 in cash,
one-half of which shall be paid to each Seller, and (ii) the grant to Sellers on
a joint basis of Exclusive Negotiation and First Refusal Rights.

     2.2 PAYMENT. At Closing, Stericycle shall pay the cash portion of the
Purchase Price to Sellers by wire transfer to each Seller of $5,000,000 in
immediately available funds in accordance with the wire transfer instructions on
the attached EXHIBIT B.

                                   ARTICLE 3
                                        
                                    CLOSING

     3.1 CLOSING. Closing of the Contemplated Transaction ("Closing") shall take
place at 10:00 a.m. Houston time as soon as practicable, but in no event later
than September 30, 1998 at the offices of Sellers' American counsel, Baker &
Botts, L.L.P., One Shell Plaza-910 Louisiana, Houston, Texas 77002, or at other
place, or in any other manner (e.g., the exchange of signed documents by
overnight courier service), that the Parties may agree on.

     3.2 CLOSING EVENTS. At Closing, the following events shall take place, all
of which shall be considered to take place concurrently:

         (a) DELIVERIES BY SELLERS. Sellers shall make the following deliveries 
    to Stericycle:

             (1) Sellers shall deliver the certificates representing the WSI
         Shares on WSI's stock transfer books, duly endorsed for transfer to
         Stericycle (or accompanied by duly executed stock powers);

             (2) Sellers shall deliver (i) the certificate or certificates
         registered in WSI's name representing the 3CI Common Stock and 3CI
         Preferred Stock on 3CI's stock transfer books and (ii) the 3CI Note;

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             (3) Sellers shall deliver the resignations, effective as of the
         Closing Date, of the incumbent officers and directors of WSI;

             (4) Sellers shall deliver the resignations, effective as of the
         Closing Date, of Dr. Werner Kook, Jurgen Thomas and Dr. Clemens Pues as
         directors of 3CI;

             (5) Sellers shall deliver a certificate, signed by a duly
         authorized officer of each Seller, certifying to Stericycle that the
         representations and warranties in Article 4 are true and correct in all
         material respects at Closing as if made at and as of Closing;

             (6) each Seller shall deliver either the opinion of its German
         counsel, addressed to Stericycle and dated as of the Closing Date,or
         such other assurances and evidence as are customary under German Law
         and satisfactory to Stericycle in its reasonable judgment from an
         American business perspective, to the effect that: (i) it is duly
         organized as a KG or GmbH under German Law; (ii) its execution,
         delivery and performance of this Agreement was duly authorized by all
         corporate or partnership action required under its Organizational
         Documents and does not violate any applicable German Laws or Orders;
         and (iii) the officer or officers signing this Agreement on its behalf
         and all Closing Documents in its name was duly authorized to do so;

             (7) Sellers shall deliver any other documents and instruments that
         Stericycle or its counsel reasonably request.

   All documents and instruments delivered pursuant to this Section shall be in
   a form approved by Stericycle on the advice of its counsel.

         (b) DELIVERIES BY STERICYCLE. Stericycle shall make the following
   deliveries to Sellers:

             (1) Stericycle shall make the wire transfers to Sellers required to
         be made under Section 2.2;

             (2) Stericycle shall deliver its written grant to Sellers on a
         joint basis of Exclusive Negotiation and First Refusal Rights;

             (3) Stericycle shall deliver a copy, certified to Sellers as true
         and correct by a duly authorized officer of Stericycle, of resolutions
         duly adopted by its board of directors authorizing Stericycle's
         execution, delivery and performance of this Agreement;

             (4) Stericycle shall deliver a certificate, signed by a duly
         authorized officer of Stericycle, certifying to Sellers that the
         representations and 

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         warranties in Article 5 are true and correct in all material respects
         at Closing as if made at and as of Closing;

             (5) Stericycle shall deliver an incumbency certificate, signed by a
         duly authorized officer of Stericycle and containing a specimen
         signature or signatures, regarding the officer or officers of
         Stericycle signing all Closing Documents delivered in its name;

             (6) Stericycle shall deliver an opinion of its counsel, Johnson and
         Colmar, dated as of the Closing Date, to the effect that: (i)
         Stericycle is duly organized as a corporation under Delaware Law; (ii)
         its execution, delivery and performance of this Agreement was duly
         authorized by all corporate action required under its Organizational
         Documents and does not violate any applicable Laws or Orders; and (iii)
         the officer or officers signing this Agreement on its behalf and all
         Closing Documents in its name was duly authorized to do so; and

             (7) Stericycle shall deliver any other documents and instruments
         that Sellers or their American counsel reasonably request.

     All documents and instruments delivered pursuant to this Section shall be
     in a form approved by Sellers on the advice of their American counsel,
     Baker & Botts, L.L.P.

                                   ARTICLE 4
                                        
                    SELLERS' REPRESENTATIONS AND WARRANTIES

     In order to induce Stericycle to enter into this Agreement, Sellers jointly
and severally represent and warrant to Stericycle that, except for any fact or
matter contained in or disclosed by any Listed Agreement, the statements in this
Article 4 are true and correct in all material respects as of the date of this
Agreement, and will be true and correct in all material respects at Closing as
if made at and as of Closing:

     4.1 SELLERS.

         (a) Each Seller has the corporate or partnership right, power,
     authority and capacity to execute and deliver this Agreement and its
     Closing Documents and to perform its obligations under this Agreement and
     its Closing Documents. Each Seller's execution, delivery and performance of
     this Agreement and its Closing Documents has been duly authorized by all
     necessary corporate or partnership action.

         (b) This Agreement constitutes, and upon each Seller's execution and
     delivery of its Closing Documents, each of its Closing Documents will
     constitute, a legal, valid and binding obligation of each Seller,
     enforceable 

                                       15

   8

     against it under both American and German Law in accordance with its terms
     (except as enforcement may be limited by applicable bankruptcy, insolvency
     or similar Laws affecting the enforcement of creditors' rights generally,
     and by legal and equitable limitations on the availability of specific
     remedies).

        (c) Each Seller is a KG duly organized, validly existing and in good
     standing under the Laws of Germany, with full power and authority to
     conduct its business as it is now being conducted, to own or use the
     properties and assets that it purports to own or use, and to perform its
     obligations under all material Contracts relating to WSI or 3CI to which it
     is a party.

     4.2 WSI SHARES.

         (a) WSI's authorized capital stock consists of 100 shares of common
     stock, no par value, and the WSI Shares constitute all of WSI's issued and
     outstanding shares. Each Seller is the owner of record, beneficial owner
     and holder of one-half of the WSI Shares (i.e., 50 shares of WSI's common
     stock, no par value), free and clear of any Liens other than restrictions
     on transfer under the Securities Act and state securities Laws.

         (b) All of the WSI Shares are duly authorized, validly issued, fully
     paid and nonassessable, and were not issued in violation of the Securities
     Act or any other Law.

         (c) There are no options, warrants, calls, puts, subscription rights,
     conversion rights or other Contracts to which WSI or either Seller is party
     or by which WSI or either Seller is bound providing for the issuance of any
     equity or other securities of WSI or (with the exception of this Agreement)
     for the purchase or sale of any WSI Shares. There are no shareholders
     agreements, buy-sell agreements, voting trusts, pledge agreements or other
     Contracts relating to the voting or disposition of any of the WSI Shares.

     4.3 NO VIOLATION. Neither Sellers' execution, delivery and performance of
this Agreement nor the consummation the Contemplated Transaction will, either
directly or indirectly (and with or without Notice or the passage of time or
both):

         (a) violate or conflict with any Organizational Document of either
     Seller or WSI or 3CI or any resolution adopted by the board of directors or
     stockholders of either Seller or WSI or 3CI;

         (b) result in a breach of or default by either Seller or WSI or 3CI
     under any material Contract;

         (c) result in the imposition or creation of a Lien upon any of the 3CI
     Interests or any of the assets of 3CI;

                                       16

   9

         (d) violate or conflict with, or give any Governmental Body or other
     Person the right to challenge the Contemplated Transaction or to obtain any
     other relief under, any Law or Order to which either Seller or WSI or 3CI
     is subject; or

         (e) violate or conflict with, or give any Governmental Body the right
     to revoke, withdraw, suspend, cancel, terminate or modify, any Permit
     issued to or held by 3CI.

     4.4 NO CONSENT REQUIRED. Neither Sellers' execution, delivery and
performance of this Agreement nor the consummation of the Contemplated
Transaction require any Notice to, filing with, Permit from or other Consent of
any Governmental Body or other Person.

     4.5 NO SUITS. There is no pending or, to Sellers' Knowledge, Threatened
Suit that challenges or seeks damages or other relief in connection with the
Contemplated Transaction or that could have the effect of preventing, delaying,
making illegal or otherwise interfering with the Contemplated Transaction.

     4.6 3CI INTERESTS OF WSI.

         (a) WSI is the owner of record, beneficial owner and holder of the 3CI
     Common Stock and 3CI Preferred Stocks, free and clear of any Liens other
     than restrictions on transfer under the Securities Act and state securities
     Laws.

         (b) The 3CI Common Stock and 3CI Preferred Stock are duly authorized,
     validly issued and fully paid and nonassessable, and were not issued in
     violation of the Securities Act or any other Law.

         (c) The 3CI Preferred Stock constitutes all of 3CI's issued and
     outstanding shares of preferred stock.

         (d) There are no shareholders agreements, buy-sell agreements, voting
     trusts, pledge agreements or other Contracts relating to or affecting the
     voting or disposition of the 3CI Common Stock or 3CI Preferred Stock.

         (e) WSI is the owner and holder of the 3CI Note, free and clear of any
     Liens. The 3CI Note was duly authorized and issued by 3CI and evidences
     bona fide indebtedness of 3CI to WSI for loans and cash advances that WSI
     actually made to 3CI. The unpaid balance of and accrued interest due under
     the 3CI Note is correctly stated on 3CI's books and records in the recorded
     amounts.

         (f) WSI is owner of the 3CI Receivable, free and clear of any Liens.
     The 3CI Receivable represents bona fide indebtedness of 3CI to WSI for
     expenses that WSI actually incurred on 3CI's behalf or cash advances that
     WSI actually made to 3CI. The balance of the 3CI Receivable is correctly
     stated on 3CI's books 

                                       17

   10

     and records in the recorded amount.

     4.7 WSI FINANCIAL CONDITION. As of Closing, WSI's assets shall consist of
the 3CI Interests, and its Liabilities shall not exceed $100,000.

     4.8 SEC FILINGS. To Sellers' Knowledge (after, among other things, due
inquiry of each of WSI's officers and directors and 3CI's principal officers):

         (a) since December 31, 1994, 3CI has filed with the SEC all
     registration statements, reports on Form 10-K, 10-Q and 8-K, proxy
     statements and information statements, and other documents that it was
     required to file under the Securities Act or the Exchange Act (the "3CI SEC
     Filings");

         (b) as of their respective dates of filing with the SEC, none of the
     3CI SEC Filings contained an untrue statement of a material fact or omitted
     to state any material fact necessary to make any statement of a material
     fact that it contained, in light of the circumstances in which made, not
     misleading; and

         (c) when filed with the SEC, each of the 3CI SEC Filings complied in
     all material respects with the applicable requirements of the Securities
     Act or the Exchange Act, as applicable.

     4.9 ABSENCE OF CERTAIN CHANGES. To Sellers' Knowledge (after, among other
things, due inquiry of each of WSI's officers and directors and 3CI's principal
officers):

         (a) since December 31, 1997, 3CI has not has engaged in any transaction
     outside of its Ordinary Course of Business (except as disclosed in any 3CI
     SEC Filing prior to the date of this Agreement);

         (b) since December 31, 1997, no event has occurred or condition has
     existed which has had a Material Adverse Effect on 3CI (except as disclosed
     in any 3CI SEC Filing prior to the date of this Agreement); and

         (c) since December 31, 1997, no event has occurred or condition has
     existed which has specific application to 3CI (other than general economic
     or industry conditions) and which reasonably would be expected to have a
     Material Adverse Effect on 3CI in the future.

     4.10 DISCLOSURE.

         (a) To Sellers' Knowledge, no representation and warranty of Sellers in
     this Article 4 contains an untrue statement or omits to state any material
     fact necessary to make any statement in the representation and warranty, in
     light of the circumstances in which made, not misleading.

                                       18

   11

         (b) To Sellers' Knowledge, no Notice given pursuant to Section 6.3 will
     contain an untrue statement or omit to state any material fact necessary to
     make any statement in the Notice, in light of the circumstances in which
     made, not misleading.

                                   ARTICLE 5
                                        
                  STERICYCLE'S REPRESENTATIONS AND WARRANTIES

     In order to induce Sellers to enter into this Agreement, Stericycle
represents and warrants to Sellers that the statements in this Article 5 are
true and correct in all material respects as of the date of this Agreement, and
will be true and correct in all material respects on the Closing Date as if made
at and as of Closing:

     5.1 AUTHORITY. Stericycle has the corporate right, power, authority and
capacity to execute and deliver this Agreement and its Closing Documents and to
perform its obligations under this Agreement and its Closing Documents.
Stericycle's execution, delivery and performance of this Agreement and its
Closing Documents has been duly authorized by all necessary corporate action.

     5.2 ENFORCEABILITY. This Agreement constitutes, and upon Stericycle's
execution and delivery of its Closing Documents, each of its Closing Documents
will constitute, a legal, valid and binding obligation of Stericycle,
enforceable against it in accordance with its terms (except as enforcement may
be limited by applicable bankruptcy, insolvency or similar Laws affecting the
enforcement of creditors' rights generally, and by legal and equitable
limitations on the availability of specific remedies).

     5.3 ORGANIZATION. Stericycle is a corporation duly organized, validly
existing and in good standing under the Laws of the State of Delaware, with full
corporate power and authority to conduct its business as it is now being
conducted, to own or use the properties and assets that it purports to own or
use, and to perform its obligations under all Contracts.

     5.4 NO VIOLATION. Neither Stericycle's execution, delivery and performance
of this Agreement nor the consummation the Contemplated Transaction will, either
directly or indirectly (and with or without Notice or the passage of time or
both):

         (a) violate or conflict with any Organizational Document of Stericycle
     or any resolution adopted by its board of directors or stockholders;

         (b) result in a breach of or default by Stericycle under any Contract;
     or

         (c) violate or conflict with, or give any Governmental Body or other
     Person the right to challenge the Contemplated Transaction or to obtain any
     other relief under, any Law or Order to which Stericycle is subject.

                                       19

   12

     5.5 NO CONSENT REQUIRED. Except for post-Closing reports and disclosures to
comply with applicable securities Laws, neither Stericycle's execution, delivery
and performance of this Agreement nor the consummation of the Contemplated
Transaction require any Notice to, filing with, Permit from or other Consent of
any Governmental Body or other Person.

     5.6 NO SUITS. There is no pending or, to Stericycle's Knowledge, Threatened
Suit that challenges or seeks damages or other relief in connection with the
Contemplated Transaction or that could have the effect of preventing, delaying,
making illegal or otherwise interfering with the Contemplated Transaction.

     5.7 INVESTMENT EXPERIENCE AND INTENT.

         (a) Stericycle is an "accredited investor" as defined in Rule 501(a)
     under the Securities Act. Stericycle has the business and financial
     experience to give it the capacity to protect its own interests in
     connection with a purchase of the WSI Shares.

         (b) Stericycle is acquiring the WSI Shares for its own account as
     principal, for investment purposes, and not with a present view to the
     further sale or distribution of the WSI Shares.

         (c) Stericycle acknowledges that its purchase of the WSI Shares will
     not have been registered under the Securities Act or registered or
     qualified under any state securities Laws in reliance by Sellers on
     specific exemptions from registration or qualification that may depend
     upon, among other things, the bona fide nature of Stericycle's investment
     intent.

         (d) Stericycle acknowledges that the WSI Shares may have to be held
     indefinitely and may not be sold, transferred or otherwise disposed of
     unless the sale or other disposition is covered by an effective
     registration statement under the Securities Act and applicable state
     securities Laws or is exempt from registration.

         (e) Stericycle acknowledges that, on the basis of the 3CI SEC Filings
     and the information about WSI and 3CI available to it pursuant to Section
     6.2, Stericycle will have had access to and will have acquired sufficient
     information about WSI to reach an informed and knowledgeable decision to
     acquire the WSI Shares.

     5.8 FINANCIAL CAPACITY. Stericycle will have the financial capacity as of
the Closing Date to satisfy its financial obligations under Sections 2.2 and
3.2(b)(1).

     5.9 DISCLOSURE. To Stericycle's Knowledge, no representation and warranty
of Stericycle in this Article 5 contains an untrue statement or omits to state
any material fact necessary to make any statement, in light of the circumstances
in

                                       20

   13

which made, not misleading.

                                   ARTICLE 6
                                        
                            EVENTS PRIOR TO CLOSING

     6.1 CONDUCT OF BUSINESS. Pending Closing (to-wit, from the date of this
Agreement until Closing), Sellers shall cause WSI to operate, and shall cause
WSI to cause 3CI to operate, only in the Ordinary Course of Business (except, in
the case of WSI, for distributions, payments and other transfers by WSI
necessary to avoid any inaccuracy in or breach of Sellers' representation and
warranty in Section 4.7).

     6.2 ACCESS TO INFORMATION. Pending Closing, Sellers shall cause WSI, and
shall cause WSI to cause 3CI, (i) to give Stericycle and its representatives
access during normal business hours (but without unreasonable interference with
operations) to the respective offices and facilities and books and records and
other documents of WSI and 3CI, (ii) to make the principal officers of WSI and
3CI and key employees of 3CI agreed to by Stericycle and Sellers available for
questioning and (iii) otherwise cooperate with Stericycle in its due diligence
activities. Sellers shall cause WSI to cause 3CI to furnish Stericycle and its
representatives with all information and copies of all documents that Stericycle
and its representatives reasonably request in accordance with the
confidentiality agreement between 3CI and Stericycle that they entered into in
August 1998.

     6.3 NOTICE OF DEVELOPMENTS. Pending Closing, Sellers shall promptly give
Notice to Stericycle of: (i) any fact or circumstance of which Sellers become
aware that causes or constitutes a material inaccuracy in or material breach of
any of their representations and warranties in Article 4 as of the date of this
Agreement; (ii) any fact or circumstance of which Sellers become aware that
would cause or constitute a material inaccuracy in or material breach of any of
their representations and warranties in Article 4 if their representations and
warranties were made on and as of the date of occurrence or discovery of the
fact or circumstance; or (iii) the occurrence of any event that may make
satisfaction of the conditions in Sections 7.1(b) and (c) impossible or
unlikely.

     6.4 NO NEGOTIATIONS. Pending Closing, Sellers shall not and shall cause WSI
not to directly or indirectly solicit, initiate or encourage any inquiries or
proposals from, discuss or negotiate with, consider the merits of any
unsolicited inquiries or proposals from, or enter into any Contract with, any
Person relating to the sale of all or any of the WSI Shares or 3CI Interests. In
this regard, and subject to Section 6.6 and the Agreed Order entered on August
14, 1998 in Case No. 95-024912 (269th Judicial District, Harris County, Texas),
Sellers shall cause WSI to inform 3CI of WSI's concern that the following
actions could have a detrimental effect on the Contemplated Transaction: (i)
entering into any new confidentiality agreement after the date of this Agreement
or (ii) providing any additional confidential information after the date of this
Agreement, pursuant to a confidentiality 

                                       21

   14

agreement that 3CI signed prior to the date of this Agreement, (A) relating to 
customer accounts, customer identities, route structures or key employees or 
(B) without the prior approval of WSI, any other confidential information. WSI 
shall (i) promptly notify all parties with whom WSI or, to its Knowledge, 3CI 
has entered into a confidentiality agreement of the Contemplated Transaction, 
(ii) cooperate with Stericycle in a joint press release regarding the 
Contemplated Transaction and (iii) make any filings with the SEC required as a 
result of entering into this Agreement.

     6.5 ETD WASTE TREATMENT UNITS.  Pending Closing, Stericycle shall not:

         (a) accept any proposal to purchase one or more regulated medical waste
     treatment units utilizing Stericycle's proprietary
     electro-thermal-deactivation technology, for installation and operation in
     Germany, that Stericycle may receive from any Person with whom it
     negotiated or had discussions prior to the date of this Agreement; or

         (b) enter into negotiations or discussions with any Person with whom it
     had not negotiated or had discussions prior to the date of this for the
     sale of one or more regulated medical waste treatment units Agreement
     utilizing Stericycle's proprietary electro-thermal-deactivation technology
     for installation and operation in Germany.

     6.6 FIDUCIARY OBLIGATIONS OF 3CI DIRECTORS. Any obligation of Sellers under
this Article 6 or Section 9.3 to cause WSI to cause 3CI to take, or not to take,
a specified action shall be subject to the fiduciary obligations of 3CI's board
of directors.

     6.7 WSI FINANCIAL STATEMENTS. WSI shall direct its accountants, Hanke,
Green & Stein, to prepare (i) audited financial statements for WSI for 1997 and
1996 in conformity with U.S. generally accepted accounting principles
consistently applied and (ii) unaudited interim condensed financial statements
for the six-month periods ended June 30, 1998 and 1997 in conformity with U.S.
generally accepted accounting principles consistently applied (including all
adjustments considered necessary for a fair presentation of WSI's financial
position and results of operation). WSI shall direct its accountants to prepare
these audited financial statements and unaudited interim condensed financial
statements as soon as possible. WSI shall also request its accountants (i) to
consent to references to them and to the use of their reports in connection with
the audited financial statements for WSI for 1997 and 1996 in any reports that
Stericycle may file with the SEC under the Exchange Act and in any registration
statements that Stericycle may file with the SEC under the Securities Act
(including, but not limited to, the Registration Statement on Form S-3 that
Stericycle filed on August 4, 1998, as it may be amended [Registration No.
333-60591],) and (ii) to provide any "comfort" letter to the underwriters that
they may require in connection with Stericycle's underwritten public offering
pursuant to the Registration Statement on Form S-3 that it filed on August 4,
1998. Stericycle shall be responsible for payment of the reasonable accounting
fees of Hanke, Green & Stein 

                                       22

   15

for their services described in this Section.

                                   ARTICLE 7
                                        
                             CONDITIONS TO CLOSING

     7.1 STERICYCLE'S CONDITIONS. Stericycle's obligation to purchase the WSI
Shares and to take the other actions required to be taken by Stericycle at
Closing is subject to the satisfaction of each of the following conditions prior
to or at Closing:

         (a) Stericycle shall be reasonably satisfied with the results disclosed
     by its due diligence activities relating to the business, financial
     condition, results of operations and prospects of WSI and 3CI, and in this
     regard, no Liability or obligation directly or explicitly incurred, assumed
     or imposed on 3CI or WSI in any of the Listed Agreements shall provide a
     basis for Stericycle's not being reasonably satisfied with the results
     disclosed by its due diligence activities;

         (b) there was no material inaccuracy in or material breach of any of
     Sellers' representations and warranties in Article 4 as of the date of this
     Agreement, and there would be no material inaccuracy in or material breach
     of any of Sellers' representations and warranties if they were made again
     at and as of Closing;

         (c) Sellers have performed in all material respects all of their
     obligations under this Agreement that they are required to perform prior to
     or at Closing;

         (d) since the date of this Agreement, no Suit has been initiated or
     Threatened that challenges or seeks damages or other relief in connection
     with the Contemplated Transaction or that could have the effect of
     preventing, delaying, making illegal or otherwise interfering with the
     Contemplated Transaction;

         (e) no claim has been asserted or threatened by any Person that he or
     she (or it) (i) is the holder or beneficial owner of or has a right to
     acquire or obtain beneficial ownership of any of the WSI Shares or the 3CI
     Interests or (ii) is entitled to all or a portion of the Purchase Price;
     and

         (f) Stericycle's consummation of the Contemplated Transaction will not
     violate any Law enacted, adopted or formally proposed or introduced since
     the date of this Agreement, or any Order entered or issued since the date
     of this Agreement, to which Stericycle is or will become subject.

Stericycle may waive any condition specified in this Section 7.1 by a written
waiver at any time prior to or at Closing.

     7.2 SELLERS' CONDITIONS. Sellers' obligation to sell the WSI Shares and to
take 

                                       23

                                     

   16
the other actions required to be taken by Sellers at Closing is subject to the
satisfaction of each of the following conditions prior to or at Closing:

         (a) there was no material inaccuracy in or material breach of any of
     Stericycle's representations and warranties in Article 5 as of the date
     of this Agreement, and there would be no material inaccuracy in or
     material breach of any of Stericycle's representations and warranties if
     they were made again at and as of Closing;

         (b) Stericycle has performed in all material respects all of its
     obligations under this Agreement that it is required to perform prior to 
     or at Closing;

         (c) since the date of this Agreement, no Suit has been initiated or
     Threatened that challenges or seeks damages or other relief in connection  
     with the Contemplated Transaction or that could have the effect of
     preventing, delaying, making illegal or otherwise interfering with the
     Contemplated Transaction; and

         (d) Sellers' consummation of the Contemplated Transaction will not 
     violate any Law enacted, adopted or formally proposed or introduced since  
     the date of this Agreement, or any Order entered or issued since the date
     of this Agreement, to which Sellers are or will become subject.

                                  ARTICLE 8

                                 TERMINATION

     8.1 TERMINATION EVENTS. This Agreement may be terminated prior to Closing:

         (a) by Stericycle, upon Notice to Sellers, if Sellers breach or 
     default in the performance of any material obligation under this Agreement
     and Stericycle does not waive the breach or default;

         (b) by Sellers, upon Notice to Stericycle, if Stericycle breaches or
     defaults in the performance of any material obligation under this 
     Agreement and Sellers do not waive the breach or default;

         (c) by Stericycle, upon Notice to Sellers, if (i) any of the 
     conditions in Section 7.1 is not satisfied as of Closing or (ii) 
     satisfaction of any condition in Section 7.1 is or becomes impossible
     (other than as a result of Stericycle's failure to perform its obligations
     under this Agreement), and Stericycle does not waive satisfaction of the
     condition;

         (d) by Sellers, upon Notice to Stericycle, if (i) any of the 
     conditions in Section 7.2 is not satisfied as of Closing or (ii) 
     satisfaction of any condition in Section 7.2 is or becomes impossible
     (other than as a result of Sellers' failure to

                                      24
   17

     perform their obligations under this Agreement), and Sellers do not waive
     satisfaction of the condition; or

         (e) by written agreement of the Parties.

     8.2 EFFECT OF TERMINATION. The Parties' respective rights of termination
under Section 8.1 are in addition to any other rights that the Parties may have
under this Agreement or otherwise, and the exercise of any right of termination
shall not be considered an election of remedies.

                                   ARTICLE 9
                                        
                                 MISCELLANEOUS

     9.1 EXPENSES. Each Party shall pay its own expenses in connection with the
negotiation and preparation of this Agreement and consummation of the
Contemplated Transaction (including any fees, commissions or similar payments
due to any broker, finder or agent acting on the Party's behalf).

     9.2 SURVIVAL OF REPRESENTATIONS. The Parties' respective representations
and warranties in Articles 4 and 5 shall survive Closing. Sellers'
representations and warranties in Sections 4.1, 4.2 and 4.6(a), and Stericycle's
representations and warranties in Section 5.1 and 5.7, shall continue in force
indefinitely. All other representations and warranties in Articles 4 and 5 shall
expire on the first anniversary of the Closing Date.

     9.3 PUBLICITY. Except in the case of a disclosure by a Party which, in the
opinion of its counsel, is required by applicable securities Laws (and then only
with prior Notice and a reasonable opportunity to comment by the other Party),
neither Party shall make any public announcement or engage in any other
publicity prior to Closing regarding this Agreement or the Contemplated
Transaction. In the event of any such public disclosure, the Parties shall use
their best efforts to coordinate their respective securities Law filings or
other public announcements. Stericycle shall cause its directors, officers,
employees, agents and advisors, and Sellers shall cause WSI to cause its
directors, officers, employees, agents and advisors and those of 3CI, to keep
the fact of negotiations by the Parties and the existence of this Agreement
confidential.

     9.4 CONFIDENTIALITY. Pending Closing, Stericycle shall maintain in
confidence, and cause its directors, officers, employees, agents and advisors to
maintain in confidence, and use only for the purposes contemplated by this
Agreement, all written, oral or other information obtained in confidence from
Sellers,WSI or 3CI in connection with this Agreement or consummation of the
Contemplated Transaction. If the Contemplated Transaction is not consummated,
Stericycle shall return or destroy so much of this information as exists in
written or tangible form as Sellers reasonably requests.

                                       25

   18

     9.5. NOTICES. All Notices under this Agreement shall be in writing and sent
by certified or registered mail, overnight messenger service, telecopier or
personal delivery, as follows:

          (a) if to Stericycle, to:

                    Stericycle, Inc.
                    1419 Lake Cook Road
                    Suite 410
                    Deerfield, Illinois 60015
                    Attention:  Mr. Mark C. Miller
                                President and Chief Executive Officer
                    Telecopier: (847) 945-6583

              with a required copy to:

                    Johnson and Colmar
                    300 South Wacker Drive
                    Suite 1000
                    Chicago, Illinois 60606
                    Attention:  Mr. Craig P. Colmar
                    Telecopier: (312) 922-9283

          (b) if to Sellers, to:

                    Rethmann GmbH & Co. Verwaltungs-und Beteiligungs-KG
                    Werner Strasse 95
                    D-59379 Selm
                    Germany
                    Attention: Mr. Reinhard Lohmann, General Manager
                               Mr. Klaus Rohmann
                    Telecopier:

                    Lobbe Holding GmbH & Co.
                    Bernhard-Hulsmann-Weg 2
                    D-58644 Iserlohn
                    Germany
                    Attention: Mr. Gustav Dieter Edelhoff, General Manager
                    Telecopier:

              with a required copy to:

                    Baker & Botts, L.L.P.
                    One Shell Plaza
                    910 Louisiana

                                       26

   19

                     Houston, Texas 77002
                     Attention:  Messrs. Charles Szalkowski
                                   and Brian P. Fenske
                     Telecopier: (713) 229-1522

All Notices sent by certified or registered mail shall be considered to have
been given three business days after being deposited in the mail. All Notices
sent by overnight courier service, telecopier or personal delivery shall be
considered to have been given when actually received by the intended recipient.
A Party may change its address for purposes of this Agreement by Notice in
accordance with this Section 9.5.

     9.6  WAIVER. The failure or any delay by any Party in exercising any right
under this Agreement shall not operate as a waiver of that right, and no single
or partial exercise of any right shall preclude any other or further exercise of
that right or the exercise of any other right. All waivers shall be in writing
signed by the Party to be charged with the waiver, and no waiver that may be
given by a Party shall be applicable except in the specific instance for which
it is given.

     9.7  ENTIRE AGREEMENT. This Agreement constitutes the complete and 
exclusive statement of the terms of the agreement between the Parties with
respect to its subject matter. This Agreement may not be amended except by a
written agreement signed by the Party to be charged with the amendment.

     9.8  ASSIGNMENT. No Party may assign any of its rights under this Agreement
without the other Party's prior written consent, with the exception that
Stericycle, without being released from any of its obligations under this
Agreement, may assign any of its rights to a wholly-owned subsidiary.

     9.9  NO THIRD PARTY BENEFICIARIES. Nothing in this Agreement shall be
considered to give any Person other than the Parties any legal or equitable
right, claim or remedy under or in respect of this Agreement. This Agreement and
all of its provisions are for the sole and exclusive benefit of the Parties and
their respective successors and permitted assigns.

     9.10 SEVERABILITY. If any provision of this Agreement is held invalid or
unenforceable by a court of competent jurisdiction, the other provisions of this
Agreement shall remain in full force and effect. Any provision of this Agreement
which is held invalid or unenforceable only in part shall remain in full force
and effect to the extent that it is not held invalid or unenforceable.

     9.11 CAPTIONS. The captions of articles and sections of this Agreement are
for convenience only and shall not affect this the construction or
interpretation of this Agreement.

     9.12 CONSTRUCTION. All references in this Agreement to "Article," "Section"
or 

                                       27

   20

"Sections" refer to the corresponding article, section or sections of this
Agreement. All words used in this Agreement shall be construed to be of the
appropriate gender or number as the context requires. Unless otherwise expressly
provided, the word "including" does not limit the preceding words or terms. All
dollar amounts in this Agreement are in United States dollars.

     9.13 COUNTERPARTS. This Agreement may be executed in one or more
counterparts, each of which shall be considered an original copy of this
Agreement and all of which, when taken together, shall be considered to
constitute one and the same agreement.

     9.14 GOVERNING LAW. This Agreement shall be governed by the Laws of the
State of Delaware without regard to conflicts of law principles.

     9.15 BINDING EFFECT. This Agreement shall apply to, be binding in all
respects upon and inure to the benefit of Parties and their respective
successors and permitted assigns.

                                       28

   21

     In witness, the Parties have executed this Agreement.

                                  STERICYCLE, INC.

                                  By  /s/ Mark C. Miller   
                                    --------------------------------
                                      Mark C. Miller
                                      President and Chief Executive Officer

                                  RETHMANN GMBH & CO. VERWALTUNGS-UND 
                                  BETEILIGUNGS-KG

                                  By   /s/ Reinhard Lohmann 
                                    --------------------------------
                                       Reinhard Lohmann
                                       General Manager

                                  By   /s/ Klaus Rohmann  
                                    --------------------------------
                                       Klaus Rohmann
                                       Controlling Manager

                                  LOBBE HOLDING GMBH & CO.

                                  By   /s/ Gustav Dieter Edelhoff 
                                    --------------------------------
                                       Gustav Dieter Edelhoff
                                       General Manager

                                       29

   22

                                                                       EXHIBIT A

                               LISTED AGREEMENTS

                                   [Omitted]

                                       30

   23

                                                                       EXHIBIT B

                           WIRE TRANSFER INSTRUCTIONS

                                        
                                   [Omitted]

                                       31

   1

                                                                 EXHIBIT 99.2

                                CREDIT AGREEMENT
                                        
                                  BY AND AMONG
                                        
                        LA SALLE NATIONAL BANK, AS AGENT
                                        
                    THE LENDERS SIGNATORY OR PARTIES HERETO
                                        
                                      AND
                                        
                                STERICYCLE, INC.
                                        
                              AND ITS SUBSIDIARIES

                                        
                    ----------------------------------------
                                        
                               SEPTEMBER 30, 1998
                                        
                    ----------------------------------------

                                       32

   2

                                CREDIT AGREEMENT

     This Credit Agreement is made as of September 30, 1998 by and among LaSalle
National Bank, a national banking association with its principal offices located
in Chicago, Illinois as Agent for the Lenders hereunder (the "Agent"), various
financial institutions which are, or may become, signatories or parties hereto
(individually, a "Lender" and collectively, the "Lenders"), and STERICYCLE,
INC., a Delaware corporation ("Stericycle"), and with its Subsidiaries, which
currently consist of the other signatory corporations indicated below
(individually, Stericycle and any of said other corporations may be referred to
herein as a "Borrower," and collectively are sometimes referred to as the
"Borrowers").

                                  WITNESSETH:

     WHEREAS, the Borrowers desire to borrow from the Lenders certain amounts
for the purposes set forth in Section 8.A.8 below;

     WHEREAS, the Lenders are agreeable to extending said credit facilities
provided that said credit facilities are secured and are on the terms and
conditions provided herein;

     WHEREAS, pursuant to a Stock Purchase Agreement (the "Acquisition
Agreement") dated as of September 3, 1998 among Stericycle and the Sellers
indicated therein (the "Sellers"), Stericycle has agreed to acquire from the
Sellers all of the issued and outstanding shares of stock of Waste Systems,
Inc., a Delaware corporation ("WSI" or the "Target") with its principal
executive offices in Shreveport, Louisiana, consisting of 100 shares of common
stock, no par value, with said acquisition being on the terms and conditions set
forth in the Acquisition Agreement (said acquisition pursuant to the Acquisition
Agreement being the "Acquisition", and the date of consummation thereof being
the "Acquisition Date");

     WHEREAS, in order to consummate the Acquisition, Stericycle has requested a
loan from the Lenders, the proceeds of which will be used to make the
Acquisition;

     WHEREAS, certain financial covenants of the Borrowers hereinafter set forth
relate to the financial condition and results of Stericycle and its
Subsidiaries, such covenants being used herein because the Subsidiaries are
Affiliates of Stericycle, and the financial condition and results of Stericycle
and its Subsidiaries are a material inducement to the Lenders' willingness to
enter into this Credit Agreement and extend the financial accommodations
referred to herein;

     WHEREAS, each Subsidiary of Stericycle acknowledges that it is benefited by
the extension of the financial accommodations provided for herein by the
Lenders; and

     WHEREAS, as a condition for extending such financial accommodations, the
Lenders require that Stericycle and each Subsidiary enter into this Credit
Agreement establishing the terms 

                                       33

   3

and conditions thereof;

     NOW THEREFORE, for and in consideration of the foregoing premises and the
mutual agreements contained herein, the parties hereto, intending to be legally
bound, do hereby agree as follows:

SECTION 1. DEFINITIONS.

     Section 1.A. In addition to the terms that are elsewhere defined herein,
when used herein, the following terms have the meanings as set forth below:

     "Accounts," "Account Debtor," "Chattel Paper," "Documents," "Equipment,"
"Fixtures," "General Intangibles," "Goods," "Instruments," "Inventory",
"Securities", "Securities Entitlements", "Securities Accounts" and "Financial
Assets" shall have the meanings assigned to the respective terms in the Security
Agreement.

     "Acquisition" is as defined in the Preamble hereto.

     "Acquisition Agreement is as defined in the Preamble hereto.

     "Acquisition Agreement Assignment" means the Collateral Assignment of
Acquisition Agreement dated the date hereof from Stericycle to the Agent, for
its benefit and for the ratable benefit of the Lenders.

     "Acquisition Date" is as defined in the Preamble hereto.

     "Acquisition Documents means the Acquisition Agreement and each other
instrument, agreement or document executed and delivered pursuant to or in
connection with the Acquisition Agreement and the Acquisition and other
transactions contemplated thereby and therein.

     "Act" or "Acts" means, collectively, the Laws of any state or governmental
subdivision thereof which apply to the conduct of business by any Borrower.

     "Adjusted Historical Pro Forma Basis" is as defined in Section 8.B.3 for
purposes of compliance with the provisions thereof, and for all other purposes
means, as at any applicable date and/or for any Measurement Period ending as at
the end of the applicable quarter involved, the relevant financial terms (i.e.
those included in calculating and/or determining all financial covenants, fees,
margins and otherwise, hereunder) as calculated and determined for the Borrowers
and, or including, any Consolidated Subsidiaries at such date, all determined in
accordance with GAAP (except that non-recurring items involving acquired
Consolidated Subsidiaries otherwise included in the relevant calculations or
determinations shall be disregarded, and except for any pro-forma EBITDA
adjustments acceptable to the Bank in its sole discretion) and calculated as if
all Consolidated Subsidiaries at such date, including acquired Consolidated 

                                       34

   4

Subsidiaries, had been owned by the Borrowers at least throughout any
Measurement Period involved.

     "Adjusted LIBOR" is defined in Section 3.A hereof.

     "Affiliate" of any Person means any other Person that directly or
indirectly, through one or more intermediaries, controls or is controlled by or
is under common control with such Person and includes, without limitation, each
shareholder, director and any Subsidiaries of such Person. For purposes of this
definition, "control" means the possession, directly or indirectly, of the power
to direct or cause the direction of the management and policies of such Person,
whether through the ownership of voting securities or by contract or otherwise.
For purposes of this Agreement, all Subsidiaries of Stericycle are Affiliates of
Stericycle. 3CI shall not be considered an Affiliate of Stericycle or any other
Borrower unless and until 3CI becomes a Subsidiary of Stericycle or any other
Borrower.

     "Agreement" means, collectively, this Credit Agreement, together with any
and all exhibits, appendices, schedules and amendments hereto and modifications,
renewals, extensions, restatements and substitutions thereof and therefor.

     "Applicable L/C Margin," for purposes of determining the Letter of Credit
fees due from the Borrowers under Section 4.C hereof, shall at all times mean
and be the same as the Applicable LIBOR Margin.

     "Applicable LIBOR Margin," for purposes of determining the interest rate on
a LIBOR Loan, means initially 1.75% (the "Normal LIBOR Margin"), provided,
however, that the Normal LIBOR Margin shall be subject to quarterly adjustment,
commencing with the fiscal quarter commencing January 1, 1999, based on the
following matrix:

       Cash Flow
     Leverage Ratio             Applicable LIBOR Margin
     --------------             -----------------------
     Equal to or less
     than 2.0:1.00                          1.25%

     2.01:1.00 through
     2.50:1.00                              1.50%

     2.51:1.00 through
     2.75:1.00                              1.75%

     2.76:1.00 or
     greater                                2.00%

                                       35

   5

     "Applicable Margin," for purposes of determining the interest rate on a
Prime Rate Loan, means initially .25% (the "Normal Margin"), provided however
that the Normal Margin shall be subject to quarterly adjustment, commencing with
the fiscal quarter following the fiscal quarter commencing January 1, 1999 based
on the following matrix:

       Cash Flow
     Leverage Ratio                     Applicable Margin
     --------------                     -----------------
     Equal to or less
     than 2.0:1.00                            0.00%

     2.01:1.00 through
     2.50:1.00                                0.25%

     2.51:1.00 through
     2.75:1.00                                0.50%

     2.76:1.00 or
     greater                                  0.75%

     "Applications" is as defined in Section 2.C.(d) hereof.

     "A Revolving Commitment" is as defined in Section 2.A.1 hereof.

     "A Revolving Loans" is as defined in Section 2.A.1 hereof.

     "A Revolving Note(s)" means the promissory notes of the Borrowers
evidencing the A Revolving Loans.

     "Authorized Officer" means one or more officers of the Borrowers duly
authorized (and so certified to the Agent by the corporate Secretary of the
Borrower(s) involved pursuant to a certificate of authority and incumbency from
time to time satisfactory to the Agent ), acting alone, to request Loans and/or
the issuance of Letters of Credit hereunder and execute and deliver documents,
instruments, agreements, reports, statements and certificates in connection
herewith.

     "B Revolving Commitment" is as defined in Section 2.A.2 hereof.

     "B Revolving LIBOR Loan" means a B Revolving Loan which is also a LIBOR
Loan.

     "B Revolving Loans" is as defined in Section 2.A.2 hereof.

     "B Revolving Notes" means the promissory notes of the Borrowers evidencing
the B 

                                       36

   6

Revolving Loans.

     "B Revolving Prime Rate Loan" means a B Revolving Loan which is also a
Prime Rate Loan.

     "Borrowing" means the total of Loans of a single type (i.e. revolving or
term) made by one or more Lenders to the Borrowers on a single date and for a
single Interest Period. Borrowings of Loans are made ratably from each of the
Lenders according to their Commitments.

     "Borrowing Base" means an amount which is equal to 80% of Eligible Accounts
(less all discounts, allowances and credits granted by an applicable Borrower to
the applicable Account Debtors, and less all contra accounts).

     "Borrowing Base Certificate" means a certificate (in form satisfactory to
the Agent) of the treasurer or authorized chief financial officer of Stericycle
as to the Borrowing Base as of the date of such certificate and certifying and
representing that all Accounts of the Borrowers identified thereon as being
Eligible Accounts meet all of the requirements and standards therefor.

     "Borrowing Notice" means the request of any of the Borrowers for Loans as
further described in Section 3.C hereof.

     "Business Day" means any day other than a Saturday, Sunday or other day on
which banks are authorized or required to be closed in Chicago, Illinois, and
with respect to LIBOR Loans, a day on which dealings in United States Dollars
may be carried on by the Agent or the Reference Bank in the London interbank
eurodollar market.

     "Capital Expenditures" means all payments, expenditures and the obligations
incurred by a Person for the purchase, creation, improvement, replacement,
substitution, addition, renovation or lease of a fixed or capital asset with a
useful life of more than one year and which are required to be classified or
accounted for as a capital asset or capital lease on the balance sheet or
statement of cash flow of such Person, as determined in accordance with GAAP,
including equipment which is purchased simultaneously with the trade-in of
existing equipment owned by such Person to the extent of the gross amount of the
purchase price of such purchased equipment less the book value of the equipment
being traded in at such time, but excluding (a) expenditures made in connection
with the replacement or restoration of assets, to the extent such replacement or
restoration is financed out of (i) insurance proceeds paid on account of the
loss of or damage to the assets so replaced or restored or (ii) awards or
compensation arising from the taking by condemnation or eminent domain of the
assets so replaced, (b) any portion of capital lease obligations that is not
required to be capitalized on such Person's balance sheet including true leases,
and (c) interest capitalized during construction, and (d) capital assets
purchased in connection with an acquisition permitted under the terms of Section
8.B.3 hereof.

     "Cash Flow Leverage Ratio" means, as determined on a Consolidated basis for
Stericycle 

                                       37

   7

and its Subsidiaries as of the end of each quarter of Stericycle's Fiscal Year
for the then applicable Measurement Period, the ratio of total Funded Debt to
EBITDA.

     "Closing Date" means the later of the date hereof or the date on which all
of the conditions precedent to the Loans set forth in Section 6 hereof have been
fully satisfied.

     "Closing Fee" is defined at Section 4.B hereof.

     "Collateral" means all "Collateral" (or other property which is subjected
to a Lien in the relevant operative document) as defined in the Security
Agreement, the Stock Pledge Agreement, the Intellectual Property Assignments,
the Mortgages, the Leasehold Mortgages, the Collateral Assignment of Leases, the
Collateral Assignment of Notes, and the Acquisition Agreement Assignment (all as
amended or supplemented), and shall also include any and all other property,
tangible and intangible, on or in which a Lien has been granted to the Agent,
for its benefit and the ratable benefit of the Lenders, pursuant to any other
Loan Documents.

     "Collateral Assignment of Leases" means the Collateral Assignment of Leases
dated the date hereof executed by the appropriate Borrower in favor of the
Agent, covering such Borrower's Leaseholds identified as Collateral Assignment
of Lease Properties in Schedule 7.R hereto.

     "Collateral Assignment of Notes" means the Collateral Assignment of Notes
dated the date hereof executed by the Borrowers in favor of the Agent, covering
such Borrower's right, title and interest in all promissory notes payable to
such Borrowers.

     "Commitment" means the aggregate of the A Revolving Commitment, the B
Revolving Commitment, and the commitment of each Lender to make the Term Loan in
the amount thereof.

     "Commitment Fees" is defined at Section 4.A. hereof.

     "Consolidated" means the consolidation of accounts in accordance with GAAP,
including principles of consolidation.

     "Consolidated Net Income" means, for any period, the net income of
Stericycle and its Consolidated Subsidiaries for such period, before the payment
of dividends on all capital stock, determined in accordance with GAAP.

     "Contingent Liability" or "Contingent Liabilities" means any agreement,
undertaking or arrangement by which any Person (i) guarantees, endorses or
otherwise becomes or is contingently liable upon (by direct or indirect
agreement, contingent or otherwise, to provide funds for payment, to supply
funds to, or otherwise to invest in, a debtor, or otherwise to assure a creditor
against loss) the debt, obligation or other liability of any other Person (other
than by endorsement of instruments in the course of collection), or (ii)
guarantees the payment of 

                                       38

   8

dividends or other distributions upon the shares of any other Person, or (iii)
undertakes or agrees (contingently or otherwise) (a) to purchase, repurchase, or
otherwise acquire any Debt, obligation or liability or any security therefor, or
(b) to provide funds for the payment or discharge thereof (whether in the form
of loans, advances, stock purchases, capital contributions or otherwise), or (c)
to maintain solvency, assets, level of income or other financial condition, or
(d) to make payment other than for values received. The amount of any Person's
obligation under any Contingent Liability shall (subject to any limitation set
forth herein) be deemed to be the outstanding principal amount (or maximum
permitted principal amount, if larger) of the debt, obligation or other
liability guaranteed or supported thereby.

     "Conversion Date" means each of September 30, 1999 (the "Initial Conversion
Date") and September 30, 2000 (the "Final Conversion Date.")

     "Debt" of any Person means all items of indebtedness, obligation or
liability of any kind or nature, whether matured or unmatured, liquidated or
unliquidated, joint or several, of such Person, including without limitation and
without duplication: Contingent Liabilities of such Person; any indebtedness
secured by a Lien on or payable out of the proceeds or production from any
property of such Person regardless of whether such indebtedness has been assumed
by such Person; obligations representing the deferred purchase price of
property; obligations which are evidenced by notes, acceptances, or other
instruments; capitalized lease obligations; and obligations in respect of
letters of credit.

     "Debt Service Coverage" means the ratio of the following amounts determined
in accordance with GAAP over any applicable Measurement Period (a) EBITDA, less
Capital Expenditures, to (b) current maturities of all Debt for or with respect
to borrowed money during such period, plus Interest Expense during such period.

     "Default" means any event which, with the giving of notice or the passage
of time or both, would constitute, become or mature into an Event of Default.

     "Default Rate" is as defined at Section 3.G hereof.

     "EBITDA" means, for any period, on a Consolidated basis for Stericycle and
its Subsidiaries, the sum for such period of (a) Consolidated Net Income, plus
(b) depreciation and amortization expense deducted in the determination of such
Consolidated Net Income, plus (c) Interest Expense deducted in the determination
of such Consolidated Net Income, plus (d) federal and state income taxes as
determined in accordance with GAAP and deducted in the determination of such
Consolidated Net Income, plus any items of extraordinary loss deducted in the
determination of such Consolidated Net Income, and minus (e) any items of gain
which are extraordinary items as defined in GAAP to the extent reflected in the
determination of such Consolidated Net Income.

     "ECCO Notes" are the four promissory notes each dated May 1, 1997 from
Stericycle to 

                                       39

   9

each of the following in the principal amounts shown: Bennett Velocci
($525,090), Orlando Velocci ($441,140), Umberto Velocci ($506,230) and the
Estate of Vincent Delbroccolo, Sr. ($827,540), to the extent they remain
collateralized with a letter of credit.

     "Eligible Accounts" are Accounts of the Borrowers which meet all of the
following requirements, as determined by the Agent in its reasonable discretion:
(a) such Accounts represent completed and bona fide transactions which arise
from arm's length transactions between unrelated parties who are not Affiliates
in the ordinary course of a Borrower's business; (b) such Accounts shall not (i)
be unpaid more than 90 days from the billing date of the original invoice or
(ii) be payable by an Account Debtor more than 30% of whose Accounts are
otherwise ineligible; (c) the services which gave rise to such Accounts were
fully rendered by a Borrower to the Account Debtor on the Borrower's customary
basis, with no part of such services or the fee therefor being disputed; (d)
such Accounts are not evidenced in whole or in part by a judgment, Chattel Paper
or Instrument; (e) Account Debtors with respect to such Accounts have not made
an assignment for the benefit of creditors and are not insolvent or the subject
of any bankruptcy, reorganization, liquidation or insolvency proceedings of any
kind or of any other proceeding or action, threatened or pending, which might
have a material adverse affect on the assets or business of such Account Debtor;
(f) Account Debtors with respect to such Accounts are not the governments of the
United States of America or any agency, department or instrumentality thereof in
excess of $250,000, are not located outside of the United States of America
(unless supported by a letter of credit acceptable to Agent), and are not
officers, directors, employees, a Subsidiary or Affiliate of any Borrower; (g)
such Accounts are valid, legally enforceable obligations of the applicable
Account Debtors and are not subject to any offset or counterclaim based on any
then existing or asserted claim or other existing or asserted defense or dispute
on the part of such Account Debtors; (h) such Accounts are evidenced by an
invoice or other documentation in form acceptable to the Agent; (i) such
Accounts are assignable and subject to a valid and first perfected security
interest in favor of the Agent, free of any and all other security interests,
liens, claims or encumbrances; and (j) such Accounts are not determined by the
Agent to be ineligible for any other reason generally accepted in the banking
business as a reason for ineligibility. No Accounts of WSI are includable in
Eligible Accounts. In addition, the parties acknowledge that no Accounts of 3CI
are includable in Eligible Accounts.

     "Employee Plan" means any pension, retirement, disability, medical, dental
or other health plan, life insurance or other death benefit plan, profit
sharing, deferred compensation, stock option, bonus or other incentive plan,
vacation benefit plan, severance plan, or other employee benefit plan or
arrangement, including, without limitation, those pension, profit-sharing and
retirement plans of the Borrowers described from time to time in the Financial
Statements and any pension plan, welfare plan, Defined Benefit Pension Plans (as
defined in ERISA) or any multi-employer plan, maintained or administered by any
of the Borrowers or any Affiliate of any of the Borrowers, to which the
Borrowers or any Affiliate of the Borrowers is a party or may have any liability
or by which any of the Borrowers or any Affiliate is bound.

     "Environmental Indemnity Agreement" means that certain Environmental
Indemnity 

                                       40

   10

Agreement of even date herewith in favor of the Agent, for its benefit and the
ratable benefit of the Lenders, executed by the Borrowers, as amended or
supplemented.

     "ERISA" means the Employee Retirement Income Security Act of 1974, as
amended from time to time, together with all rules and regulations issued
thereunder or in connection therewith.

     "Eurodollar Reserve Percentage" is defined in Section 3.A hereof.

     "Event of Default" means an event or occurrence described in Section 9 of
this Agreement.

     "Expiration Date" is defined at Section 2.A.1 hereof.

     "Federal Funds Rate" means the rate for that day set forth opposite the
caption "Federal Fund (Effective)" in the daily statistical release designated
as "Composite 3:30 p.m. Quotations for U.S. Government Securities," or any
successor publication, published by the Federal Reserve Bank of New York or, if
such publication shall be suspended or terminated, the arithmetic average of the
rates quoted to the Agent as the prevailing rates per annum (rounded upward, if
necessary, to the next higher 1/100 of 1%) bid at approximately 10:00 a.m.
(Chicago time) (or as soon thereafter as is practicable) on such day by two or
more New York or Chicago Federal funds dealers of recognized standing selected
by the Agent for the purchase at face value of Federal funds in the secondary
market in an amount comparable to the principal amount owed for which such rate
is being determined.

     "Financial Assurance" means the financial assurance (whether in the form of
a bond, letter of credit, cash or otherwise) required pursuant to any Act.

     "Financial Statements" means all of the balance sheets, statements of
operations, statements of cash flow and statements of changes in shareholders'
equity of the Borrowers for each Fiscal Year or each month or quarter thereof
which have been delivered to the Agent on or prior to the date hereof and which
are to be delivered to the Agent pursuant to Section 8.A.2 of this Agreement.

     "Fiscal Year" means the fiscal year of Stericycle and its Subsidiaries
ending on December 31 for each year.

     "Funded Debt" means Debt for or with respect to borrowed money, provided in
any event that for all purposes hereof all Loans and Letter of Credit
Utilization shall be considered as and included in Funded Debt. Debt shall
exclude the ECCO Notes.

     "GAAP" means generally accepted accounting principles, applied on a basis
consistent with prior periods; provided, however, that GAAP with respect to any
interim financial 

                                       41

   11

statements or reports shall be deemed subject to year-end adjustments and
footnotes made in accordance with GAAP.

     "Intellectual Property Assignment" means the Collateral Assignment of
Intellectual Property dated the date hereof among the Borrowers and the Agent.

     "Intellectual Property Rights" means all patents and patent applications,
trademarks, copyrights, trade names, trade dress, trade secrets, design rights,
service marks, trademarks and service mark registrations and applications,
registrations and renewals thereof, confidential research, development and
commercial information, know-how and other proprietary information, together
with any licenses of (whether as licensor or licensee) and license agreements
pertaining to any of the foregoing and all license fees and royalties arising
from the use thereof, all rights corresponding to the foregoing and all other
rights of any kind whatsoever accruing thereunder or pertaining thereto
(including without limitation, all claims for damages by way of past, present
and future infringement of any of the rights included above, with the right, but
not the obligation, to sue for and collect such damages for said use or
infringement of the rights included above), together in each case with the
goodwill of the business connected with the use of and symbolized by each such
trademark and service mark.

     "Interest Expense" means, with respect to any Person, for any period, the
aggregate interest expense, net of interest income, for such period (including,
without duplication, all commissions, discounts, and other fees and charges owed
with respect to letters of credit, the portion of any capitalized lease
obligations allocable to interest expense, and capitalized interest) determined
in accordance with GAAP (but in any event excluding interest on tax assessments
to the extent such interest is included in deferred taxes).

     "Interest Period" is defined at Section 3.D hereof.

     "Interest Rate Contract" means interest rate protection, swap, or collar
agreements, and other similar agreements or arrangements (if any) designed to
provide protection against fluctuations in interest rates, pursuant to which any
of the Borrowers has obligations to any Lender that may require payment in the
future by any such Borrowers.

     "Laws" means all ordinances, statutes, rules, regulations, codes, orders,
injunctions, writs or decrees of any government, whether federal, state,
municipal, local or foreign, of any political subdivision or agency thereof, or
of any court, board or similar entity established by any of the foregoing,
including without limitation all of the foregoing which relate to the
generation, segregation, handling, packaging, collection, transportation,
treatment, storage and/or disposal of regulated medical waste.

     "L/C Refinancing Borrowing" is defined at Section 3.C hereof.

     "Leaseholds" means all of the right, title and interest of any Borrower in,
to and under 

                                       42

   12

any leases, sub-leases, licenses or other agreements, granting rights to a
Borrower to enter, occupy or use real property.

     "Leasehold Mortgages" means the Leasehold Mortgages and/or deeds of trust
dated the date hereof executed by the appropriate Borrower in favor of the
Agent, on its behalf and for the ratable benefit of the Lenders covering such
Borrower's Leaseholds identified as Leasehold Mortgage Properties in Schedule
7.R. hereto.

     "Letter of Credit" is defined in Section 2.A.1 hereof.

     "Letter of Credit Utilization" means, as of any date of determination, the
sum of (i) the maximum aggregate amount which is or at any time thereafter may
be available for drawing under all Letters of Credit then outstanding plus (ii)
the aggregate amount of all drawings under Letters of Credit honored by the
Agent and not theretofore reimbursed by the Borrowers.

     "Leverage Ratio" means, as determined on a consolidated basis for
Stericycle and its Subsidiaries as of the end of each quarter of Stericycle's
Fiscal Year for the then applicable Measurement Period, the ratio of total
Funded Debt to EBITDA.

     "LIBOR" is defined in Section 3.A hereof.

     "LIBOR Loan" means a Loan bearing interest at the rate specified in Section
3.A(b) hereof.

     "Lien" means any security interest, mortgage, pledge, hypothecation,
collateral assignment, lien (statutory or otherwise'), charge or encumbrance of
any kind or nature whatsoever, any deposit or preferential arrangement of any
kind or nature whatsoever, including, without limitation, any conditional sale
or other title retention agreement, or any financing lease involving
substantially the same economic effect as any of the foregoing.

     "Loan" means a Revolving Loan or a Term Loan and "Loans" means the
Revolving Loans and the Term Loans, collectively and in the aggregate.

     "Loan Documents" means, collectively, any Application, Interest Rate
Contract hereafter entered into, and all of those documents set forth and
described in Section 6 hereof, as amended, modified, supplemented or restated
from time to time, and any facilities or agreements in replacement thereof.

     "Margin Stock" means "margin stock" as defined in Regulation U of the Board
of Governors of the Federal Reserve System.

     "Materially Adverse Effect" means, relative to any occurrence, event,
condition or circumstance, or any change therein, of whatever nature (including
any adverse determination in 

                                       43

   13

any litigation, arbitration, or governmental investigation or proceeding), a
materially adverse effect on: (i) the assets of or the business, revenues,
financial condition, operations or prospects of the Borrowers taken as a whole;
or (ii) the ability of the Borrowers, taken as a whole, to timely or fully
perform any of the payment or other material obligations involving any of their
Debt.

     "Measurement Period" means with respect to each quarter ending December 31,
1998 and thereafter, the rolling period of the four fiscal quarters then ending.

     "Monies" means (i) all cash at any time on deposit with or held by the
Agent or any other bank or institution for the account of any Borrower, (ii) all
accounts of any of the Borrowers with the Agent or any other bank or
institution, (iii) all investments and reinvestments of amounts from time to
time credited to such accounts, and (iv) all interest, dividends, distributions
and other proceeds payable on or with respect to such investments and
reinvestments and such accounts.

     "Mortgages" means the Mortgages and/or deeds of trust dated the date hereof
executed by the appropriate Borrower in favor of the Agent, on its behalf and
for the ratable benefit of the Lenders, covering such Borrower's owned
properties identified as Owned Properties in Schedule 7.R. hereto.

     "Mortgaged Properties" means the properties covered by the Mortgages, the
Leasehold Mortgages and the Collateral Assignment of Leases.

     "Net Cash Proceeds" means, in each case as set forth in a statement in
reasonable detail delivered to the Agent: (a) with respect to the disposition of
any asset by an Person, the excess, if any, of (i) the cash received in
connection with such disposition over (ii) the sum of (A) the principal amount
of any Debt (other than Debt under this Agreement) which is secured by such
asset and which is required to be repaid in connection with the disposition
thereof, plus (B) the reasonable out-of-pocket expenses incurred by such Person
in connection with such disposition, plus, (C) provision for taxes, including
income taxes, attributable to the disposition of such asset; (b) with respect to
the issuance by any Person of any equity securities or Debt, the gross proceeds
received by such Person from such issuance less all legal expenses, discounts
and commission and other fees and expenses incurred or to be incurred and all
federal, state, local and foreign taxes assessed or to be assessed in connection
therewith; and (c) with respect to the receipt by any Person or the Agent of any
payment under any insurance policy or pursuant to any condemnation award, the
aggregate amount of any such payment made to the Agent less any income tax
liability of such Person reasonably estimated by such Person to relate to such
payment and all legal expenses incurred in connection with the recovery or
collection thereof.

     "Net Worth" means, at any time, the total of Stockholders' Equity and
Subordinated Debt.

                                       44

   14

     "Note(s)" means the Revolving Notes and the Term Note.

     "Obligations" means each and every promise, agreement, covenant, debt and
all other liabilities, obligations and indebtedness of any of the Borrowers,
their successors or assigns, to the Lenders, or any Lender or the Agent whether
primary, secondary, contingent, direct, or indirect, howsoever incurred,
created, arising or evidenced, whether presently or hereafter existing,
evidenced, arising or becoming due, which such promise, agreement, covenant,
debt, liabilities, obligations or indebtedness arises from or in connection with
the Loans or under this Agreement, the Notes, the Applications, the Letters of
Credit (including reimbursement obligations with respect thereto), any Interest
Rate Contract or any other Loan Documents, or any refinancings, substitutions,
extensions, renewals, replacements and modifications for or of the foregoing, or
the enforcement by the Agent or the Lenders of their rights and remedies under
any or all of the foregoing (including all costs, expenses and reasonable
attorneys' and paralegals' fees and expenses incurred by the Agent or the
Lenders), including any of the foregoing that arises after the filing of a
petition by or against a Borrower under any insolvency or related proceeding,
even if the obligations do not accrue because of the automatic stay under
bankruptcy laws or otherwise.

     "Other 3CI Interests" means, exclusive of the 3CI Common Stock, 3CI
Preferred Stock, 3CI Note and 3CI Receivable, (i) all of WSI's other interests,
if any, in or relating to 3CI (including, but not limited to, any security
interest in or mortgage on 3CI's assets granted by 3CI as security for its
payment of the 3CI Note or 3CI Receivable (or both)); (ii) all of WSI's claims,
rights and causes of action of any kind against 3CI, and (iii) all of WSI's
rights arising from or in respect of its ownership of the 3CI Common Stock, 3CI
Preferred Stock, 3CI Note or 3CI Receivable (for example, antidilution rights
under any settlement agreement or any other contract).

     "Permitted Investments" means (i) cash, (ii) readily marketable securities
issued or guaranteed by the government of the United States of America or any
agency thereof having a maturity at the time of issuance of not exceeding one
year, (iii) commercial paper rated at least A-1 by Standard & Poor's Corporation
or P-1 by Moody's Investors Service, Inc., having a maturity at the time of
issuance not exceeding one year, and money market funds invested in short-term
securities rated at least as provided in the preceding clause, (iv) certificates
of deposit of or demand or time deposits with or repurchase agreements of any
commercial bank which is organized under the laws of the United States of
America or any state thereof and has capital and surplus of in excess of
$100,000,000, and demand deposits or local operating accounts with the Lenders
or any other financial institutions acceptable to the Agent, (v) property used
in the ordinary course of business, the purchase of which does not otherwise
violate or cause or result in a violation of any provision hereof, (vi) current
assets arising from the sale of goods and services in the ordinary course of
business, (vii) loans or advances to employees in the ordinary course of
business, and loans to officers not in excess of $300,000 at any time
outstanding, (viii) unsecured intercompany loans or advances to or among the
Borrowers, which do not otherwise violate or cause or result in a violation of
any provision hereof, (ix) existing investments in 

                                       45

   15

existing Subsidiaries of Stericycle, and existing investments of WSI in 3CI, and
(x) existing investments and the acquisitions permitted under Section 8.B.3
hereof, and the transactions pemitted under Section 8.B.5 hereof.

     "Permitted Liens" means any Liens (i) provided for hereunder or under the
Loan Documents in favor of the Agent; (ii) for taxes or assessments not yet due
and payable; (iii) of vendors incurred in the ordinary course of business,
payment with respect to which is not then due and payable; (iv) which arise out
of pledges or deposits under any Laws relating to workers' compensation,
unemployment insurance, old age pensions or other social security or retirement
benefits; (v) which are being contested in good faith by appropriate and lawful
proceedings, so long as levy and execution thereon have been and continue to be
stayed and which do not materially impair or adversely affect the value or use
of the assets and properties of any Borrower or the operation or condition of
the business of any Borrower; (vi) which are existing on Equipment, Fixtures
and/or real property of any Borrower and are set forth on Schedule 7.G hereto,
provided, however, that the Debt secured by existing Liens on Equipment,
Fixtures and/or real property shall not be increased and such Debt shall not be
secured by any Equipment, Fixtures and/or real property other than that securing
such Debt as of the date hereof; (vii) which are purchase money security
interests on Equipment and/or Fixtures (exclusive of any such Liens referred to
in subparagraph (vi) above) securing the deferred purchase price thereof within
the limitations of and as may be permitted under Section 8.B.2(vii) hereinafter;
provided, however, that any such Lien shall attach only to the Equipment and/or
Fixture financed by the holder of such Lien; (viii) which secure Debt assumed or
incurred in or in connection with any asset acquisition permitted under Section
8.B.3 and which encumber only the assets acquired; (ix) which secure Debt
assumed or incurred in connection with a stock or other equity acquisition
permitted under Section 8.B.3 and which encumber only the assets as of the date
of acquisition of the Person whose stock or equity was acquired; (x) on cash
collateralizing Financial Assurance not to exceed the amount of such Financial
Assurance; (xi) which are currently existing on Accounts of any Borrower and are
set forth on Schedule 7.G hereto; or (xii) with respect to the property (other
than Accounts) of any new Subsidiary of any of the Borrowers which becomes a
Subsidiary after the date hereof, so long as such Liens are either incurred in
connection with an acquisition by the Borrowers permitted under Section 8.B.3
hereof or were in existence prior to such acquisition, and, if incurred in
connection with such an acquisition, are subordinated to the Liens in favor of
the Agent, on its behalf and for the ratable benefit of the Lenders.

     "Person" means any individual, sole proprietorship, joint venture,
partnership, association, unincorporated organization, joint-stock company or
association, trust, corporation, entity, institution or government body (or
agency or political subdivision thereof).

     "Pledged Shares" means the shares of common and preferred stock of each of
the Subsidiaries owned directly or indirectly by Stericycle, all of which are
pledged to the Agent, for its benefit and for the ratable benefit of the
Lenders, pursuant to the Stock Pledge and Security Agreement of even date
herewith among the Agent, Stericycle and the other Pledgors ("Pledgors")
referred to therein (the "Stock Pledge Agreement").

                                       46

   16

     "Preferences" is defined at Section 7.K. hereof.

     "Prime Rate" means the rate of interest announced or referred to by the
Agent from time to time as its prime or reference rate for interest rate
determinations, with each change in such Prime Rate to take effect on the same
day such change is announced by the Agent. The use of the term "Prime Rate"
herein or in any Note is not intended nor does it imply that said rate of
interest is a preferred rate of interest or one which is offered by the Agent to
its most creditworthy customers.

     "Prime Rate Loan" means a Loan bearing interest at the rate specified in
Section 3.A(a) hereof.

     "Reference Bank" means ABN/AMRO Bank.

     "Refunding Borrowing" is defined in Section 3.C(d) hereof.

     "Registration Statement" means the Form S-3 Registration Statement under
the Securities Act of 1933, dated August 4, 1998, as amended.

     "Required Lenders" means as of the date of determination thereof, if there
are more than two Lenders, those Lenders holding at least 66-2/3% of the
Commitments or, in the event that there are two or fewer Lenders as of the date
of determination, hereunder, those Lenders holding at least 100% in aggregate
principal amount of the Loans outstanding hereunder.

     "Restricted Payments" means (i) any dividend payment or other distribution,
direct or indirect, of assets, properties, cash, rights, obligations or
securities on account of any shares of any class of capital stock of any
Borrower which is not a wholly-owned Subsidiary of Stericycle, or (ii) any
exchange, conversion, repurchase, purchase, redemption, retirement, sinking fund
or other similar acquisition for value, direct or indirect, of any shares of any
class of capital stock of any Borrower or any warrants, rights or options to
acquire any such shares, now or hereafter outstanding, (iii) any payment or
repayment of principal of, premium (if any), or interest on any Subordinated
Debt, and any redemption, purchase, retirement, defeasance, sinking fund or
similar payment with respect to any Subordinated Debt, unless permitted by the
terms of the document or instrument pursuant to which said Subordinated Debt is
created and which have been approved by the Agent, or (iv) any earn-out under
any acquisition agreement in excess of the thresholds set forth in Section
8.B.3, unless permitted by the terms thereunder and approved by Agent.

     "Revolving Loans" means, collectively, the A Revolving Loan(s) and the B
Revolving Loan(s).

     "Revolving LIBOR Loan" means a Revolving Loan which is also a LIBOR Loan.

                                       47

   17

     "Revolving Notes" means, collectively, the A Revolving Note and the B
Revolving Note.

     "Revolving Prime Rate Loan" means a Revolving Loan which is also a Prime
Rate Loan.

     "SEC" means the Securities and Exchange Commission.

     "Security Agreement" means that certain Security Agreement of the Borrowers
in favor of the Agent, for its benefit and the ratable benefit of the Lenders,
of even date herewith, as the same may be amended or supplemented.

     "Seller" is as defined in the Preamble hereto.

     "Stated Amount" of each Letter of Credit means the total amount of the
Letter of Credit available for drawing thereunder.

     "Stock Pledge Agreement" is as defined and included in the definition of
Pledged Shares.

     "Stockholders' Equity" means the sum of the capital stock, additional
paid-in-capital and retained earnings (after deducting treasury stock) as
determined in accordance with GAAP.

     "Subordinated Debt" means Debt for money borrowed by any Borrower if, but
only to the extent that, the payment and, if permitted hereunder, any collateral
therefor is and remains at all times subordinated to the Obligations and the
collateral and other security therefor, on terms and conditions satisfactory to
the Agent.

     "Subsidiary" with respect to any Person means any corporation or other
business entity of which more than fifty percent (50%) of the outstanding common
stock or other ownership interests is owned, directly or indirectly, by such
Person.

     "Target" is as defined in the Preamble hereto.

     "Term LIBOR Loan" means a Term Loan which is also a LIBOR Loan.

     "Term Loan" is a defined in Section 2.B.1 hereof.

     "Term Notes" and "Term Loans" means the promissory note of the Borrowers
evidencing the Term Loan.

     "Term Prime Rate Loan" means a Term Loan which is also a Prime Rate Loan.

     "Termination Date" means September 30, 2003.
 
     "Total Capitalization" means the sum of (i) the aggregate amount of Debt
for borrowed money and (ii) Stockholders Equity.

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   18

     "Total Leverage Ratio" means, as determined on a consolidated basis for the
Borrowers as of the end of each quarter of Borrowers' Fiscal Year for the then
applicable Measurement Period, the ratio of total Funded Debt to EBITDA.

     "Transaction Documents" means the Loan Documents and the Acquisition
Documents.

     "3CI Interests" means the following: (i) 5,104,448 shares of common stock,
par value $.01 per share (the "3CI Common Stock"), of 3CI Complete Compliance
Corporation, a Delaware corporation ("3CI") with its principal executive offices
in Shreveport, Louisiana, which represents 52.2% of the 9,778,825 shares of
3CI's common stock issued and outstanding as of July 24, 1998; 7,750,000 shares
of 3CI's preferred stock (the "3CI Preferred Stock"), consisting of 7,000,000
shares of 3CI's preferred stock designated as Series B Preferred Stock and
750,000 shares of 3CI's preferred stock designated as Series C Preferred Stock,
which represents 100% of the issued and outstanding shares of preferred stock of
3CI; (iii) Revolving Promissory Note dated September 30, 1995, from 3CI to WSI,
as amended (the "3CI Note") in the original principal amount of $8,000,000, an
unpaid principal balance as of September 30, 1998 of $4,898,699, and a current
maturity date of September 30, 1998; and (iv) an account receivable of WSI from
3CI (the "3CI Receivable") with a balance as of July 31, 1998 of $466,906.

     "UCC" means the version of the Uniform Commercial Code as enacted in
Illinois, as amended from time to time.

     Section 1.B. Any accounting terms used but not otherwise defined herein
shall have their customary meanings as defined in, pursuant to, or in accordance
with GAAP. All other terms used but not otherwise defined herein shall have the
meanings provided by the UCC to the extent said terms are used or defined
therein.

     Section 1.C. Unless otherwise defined or the context otherwise requires,
terms for which meanings are provided in this Agreement shall have such meanings
when used in the other Loan Documents.

     Section 1.D. In this Agreement and each other Loan Document, unless a clear
contrary intention appears: (i) the singular number includes the plural number,
and vice versa; (ii) reference to any Person includes such Person's successors
and assigns but, if applicable, only if such successors and assigns are
permitted by this Agreement, and reference to a Person in a particular capacity
excludes such Person in any other capacity or individually; (iii) reference to
any gender includes each other gender; (iv) references to any agreement
(including this Agreement and the Schedules, Appendices and Exhibits hereto),
document or instrument means such agreement, document or instrument as amended
or modified and in effect from time to time in accordance with the terms thereof
and, if applicable, the terms hereof and reference to any promissory note
includes any promissory note which is an extension or renewal thereof or a
substitute or replacement therefor; (v) unless the context indicates otherwise,
reference to any Article, Section, Appendix, Schedule or Exhibit means such
Article or Section hereof or Schedule, Appendix or 

                                       49

   19

Exhibit hereto; (vi) "hereunder," "hereof," "hereto" and words of similar import
shall be deemed references to this Agreement as a whole and not to any
particular Article, Section or other provision hereof; (vii) "including" (and
with correlative meaning "include") means including without limiting the
generality of any description preceding such term; and (viii) relative to the
determination of any period of time, "from" means "from and including" and "to"
and "through" means "to but excluding."

     Section 1.E. If, after the date of this Agreement, there shall occur any
change in GAAP from those used in the preparation of Stericycle's audited
financial statements for the Fiscal Year ending December 31, 1997, and such
change shall result in a change in the method of calculation of any financial
covenant, standard or term found in this Agreement, either Stericycle or the
Required Lenders may by notice to the other require that the Lenders and the
Borrowers negotiate in good faith to amend such covenant, standard or term so as
equitably to reflect such change in GAAP, with the desired result being that the
criteria for evaluating the financial condition of the Borrowers shall be the
same as if such change had not been made.

     Section 1.F. For all purposes of this Agreement, the Target is included
within the definition of "Subsidiary" of Stericycle and shall be a "Borrower"
hereunder, if as and when the Acquisition is completed.

SECTION 2. CREDIT FACILITIES.

     Section 2.A. Revolving Loans and Revolving Notes.  Subject to the terms and
conditions of this Agreement, the Lenders agree to lend to the Borrowers the
Revolving Loans as provided in this Section.

     2.A.1. A Revolving Loans. Subject to the terms and conditions of this
Agreement, the Lenders agree to lend to the Borrowers from time to time until
the earlier of the Termination Date or the occurrence of either a Default or an
Event of Default hereunder (the earlier of such date being hereinafter referred
to as the "Expiration Date"), such sums, in a minimum amount(s) as set forth in
Section 3.B hereof, as Borrowers may request from time to time by a Borrowing
Notice pursuant to Section 3.C hereof; provided, however, that the aggregate
principal amount of all loans outstanding under this Section 2.A.1
(individually, a "A Revolving Loan" or "Loan" or, collectively, the "A Revolving
Loans" or "Loans") plus the Stated Amount of all letters of credit issued
pursuant to Section 2.C hereof (the "Letters of Credit") at any one time shall
not exceed the lesser of (i) Five Million Dollars ($5,000,000) or (ii) the
Borrowing Base (such lesser amount hereinafter referred to as the "A Revolving
Commitment"). Such borrowing of loans shall be made ratably from the Lenders in
proportion to their respective A Revolving Commitments. Subject to the terms and
conditions hereof, the Borrowers may borrow or repay and reborrow hereunder,
from the date hereof until the Expiration Date, either the full amount of the A
Revolving Commitment or any lesser sum in the minimum amounts referred to
herein. If, at any time, the A Revolving Loans plus the Stated Amount of
outstanding Letters of Credit exceed the A Revolving Commitment, the Borrowers
shall immediately notify the Agent of the existence of 

                                       50

   20

and pay to the Agent the amount of such excess. The maximum amount of the A
Revolving Commitment of each Lender shall be as set forth opposite its name on
the applicable signature page hereto (subject to any reductions thereof pursuant
to the term hereof). For all purposes of this Agreement, where a determination
of the unused or available amount of the A Revolving Commitment is necessary,
the Revolving Loans and the Letter of Credit Utilization shall be deemed to
utilize the A Revolving Commitment. The obligations of the Lenders under this
Section 2.A.1 are several and not joint and no Lender shall under any
circumstances be obligated to extend credit under this Section 2.A.1 in excess
of its A Revolving Commitment.

     2.A.2. B Revolving Loans. Subject to the terms and conditions of this
Agreement, the Lenders agree to lend to the Borrowers from time to time until
the earlier of each Conversion Date or the Expiration Date such sums, in a
minimum amount as set forth in Section 3.B hereof, as Borrowers may request from
time to time by a Borrowing Notice pursuant to Section 3.C hereof, provided,
however, that the aggregate principal amount of all loans outstanding under this
Section 2.A.2 (individually, a "B Revolving Loan" or, collectively, the "B
Revolving Loans", or together with the A Revolving Loans, "Revolving Loans" or "
Loans") at any one time shall not exceed: (i) Fifteen Million Dollars
($15,000,000) on or before the Initial Conversion Date, or (ii) $15,000,000,
less the amount of the Term Loans made on the Initial Conversion Date, from and
after the Initial Conversion Date to the Final Conversion Date (the "B Revolving
Commitment" or, together with the A Revolving Commitment, the "Revolving
Commitments"). Such borrowing of loans shall be made ratably from the Lenders in
proportion to their respective B Revolving Commitments. The Borrowers may borrow
or repay and reborrow hereunder, from the date hereof until the earlier of each
Conversion Date or the Expiration Date, either the full amount of the then
applicable B Revolving Commitment or any lesser sum in the minimum amounts
referred to herein. If, at any time, the B Revolving Loans exceed the then
applicable B Revolving Commitment, the Borrowers shall immediately notify the
Agent of the existence of and pay to the Agent the amount of such excess. The
maximum amount of the B Revolving Commitment of each Lender shall be as set
forth opposite its name on the applicable signature page hereto (subject to any
reductions thereof pursuant to the term hereof). The obligations of the Lenders
under this Section 2.A.2 are several and not joint and no Lender shall under any
circumstances be obligated to extend credit under this Section 2.A.2 in excess
of its B Revolving Commitment.

     Also subject to the terms and conditions of this Agreement, the Lenders and
Borrowers agree that all B Revolving Loans outstanding on each Conversion Date
shall be consolidated and loaned by the Lenders on a term loan basis to the
Borrowers. Any term loans made pursuant to this paragraph are hereinafter
sometimes referred to as the "Term Loan or "Term Loans." Such borrowing of loans
shall be made from the Lenders in the same amounts as the amounts of their
respective B Revolving Loans outstanding on the respective Conversion Date. The
obligations of the Lenders under this paragraph are several and not joint and no
Lender shall under any circumstances be obligated to extend credit under this
paragraph in excess of the amount of the Term Loan to be made by it.

                                       51

   21

     2.A.3. Revolving Notes. In order to evidence the Revolving Loans, at the
time of the making of the initial A Revolving Loan and B Revolving Loan, the
Borrowers will execute and deliver promissory notes payable to each Lender in
the principal amount of its A Revolving Commitment and B Revolving Commitment,
substantially in the form of Exhibits A and B hereto, respectively (together
with any and all amendments, modifications, supplements, substitutions,
renewals, extensions and restatements, thereof and therefor whether
individually, or collectively, the "A Revolving Note" and the "B Revolving
Note"). The respective Revolving Loans shall bear and pay interest and mature on
the date as set forth therein and herein.

     2.B.   Term Loan and Term Note. Subject to the terms and conditions of this
Agreement, the Lenders agree to lend to the Borrowers the Term Loans as provided
in this Section.

     2.B.1. Term Loan and Term Note. On each Conversion Date, amounts of B
Revolving Loans then outstanding shall be converted into a Term Loan (the "Term
Loan or "Term Loans"), to be repayable in accordance with the following
provisions; the Term Loan shall be evidenced by, bear interest, be repayable and
mature in accordance with the provisions hereof and of Term Notes of the
Borrowers in the form of Exhibit C hereto, with appropriate insertions (together
with any and all amendments, modifications, supplements, substitutions,
renewals, extensions and restatements, thereof and therefor, whether
individually or collectively, the "Term Note" or the "Term Notes"). The
Borrowers shall deliver to the Lenders executed and completed Term Notes payable
to the order of each Lender in the principal amount of its B Revolving Loans
outstanding on the applicable Conversion Date. The Term Notes shall be dated on
the applicable Conversion Date, shall mature on the Termination Date, and shall
require quarterly principal payments in substantially equal amounts based on a
four (4) year or three (3) year (as appropriate) amortization of the principal
amount thereof. The Term Loans and Term Notes shall bear interest as provided
herein and therein. On the Initial Conversion Date, the amount of the B
Revolving Commitments shall thereupon be permanently reduced by the amount of
the Terms Loans made on said Initial Conversion Date, and on the Final
Conversion Date the amount of the B Revolving Commitments shall thereupon be
permanently reduced to $0.

     Section 2.C.  Letters of Credit.

     (a)    General Terms. Subject to all of the terms and conditions hereof,
the A Revolving Commitment may be availed of in the form of Letters of Credit,
provided that the aggregate outstanding amount of Letter of Credit Utilization
by the Borrowers hereunder shall in no event exceed the lesser of (aa) the
unused amount of the A Revolving Commitment or (bb) $1,000,000. The Letters of
Credit shall be issued by the Agent, but each Lender shall be obligated to
reimburse the Agent for a pro rata share of the amount of each draft drawn
thereunder and, accordingly, each Letter of Credit shall be deemed to utilize
the Revolving A Commitments of all Lenders pro rata in accordance with the
respective amounts thereof.

     (b)    Term. Each Letter of Credit issued hereunder shall expire not later
than sixty (60) 

                                       52

   22

days prior to the Termination Date. On the Expiration Date or on such earlier
date on which the A Revolving Commitment is terminated or the A Revolving Note
is accelerated, the Borrowers shall pay to the Agent an amount equal to the
aggregate amount undrawn on all the Letters of Credit which are outstanding on
that date to be held as cash collateral for the Obligations in respect of such
Letters of Credit.

     (c)    General Characteristics. Each Letter of Credit issued hereunder
shall be a standby or commercial letter of credit, shall be payable in U.S.
dollars, shall conform to the general requirements of the Agent for the issuance
of standby or commercial letters of credit as to form and substance, shall be a
letter of credit which the Agent may lawfully issue, and shall be issued for the
account of the Borrowers.

     (d)    Applications; Reimbursement. At the time any Borrower requests any
Letter of Credit to be issued (or prior to the first issuance of a Letter of
Credit, in the case of a continuing application), an Authorized Officer shall
execute and deliver to the Agent an application for such Letter of Credit in the
form customarily prescribed by the Agent for a Letter of Credit of the type
requested (the "Applications"). The terms, conditions and provisions of all
Applications are incorporated herein by reference and made a part hereof,
provided that if there is a direct and irreconcilable conflict between the
terms, conditions and/or provisions of an Application and the specific
provisions of this Agreement, this Agreement shall be controlling. Subject to
the other provisions of this Section 2.C, the Borrowers' obligation to reimburse
the Agent for drawings under a Letter of Credit shall be absolute, unconditional
and irrevocable under any and all circumstances and governed by the Application
for such Letter of Credit, except that in any event the Borrowers' reimbursement
for a drawing shall be made to the Agent by no later than the same Business Day
which is the date when such drawing was paid. In the event that the Agent is not
reimbursed by such time for the amount of any draft drawn under a Letter of
Credit issued hereunder, the obligation of the Borrowers to reimburse it for the
amount of such draft so paid by the Agent shall bear interest (which the
Borrowers hereby promise to pay) from and after the date such draft was paid
until such reimbursement is made at the rate per annum determined by adding the
Default Rate to the rate of interest for Revolving Prime Rate Loans as from time
to time in effect. Anything contained in the Applications to the contrary
notwithstanding, the Borrowers shall pay fees in connection with Letters of
Credit as set forth in Sections 4.C and 4.D hereof. Subject to the conditions
contained in Section 6.C., the Borrowers may satisfy their reimbursement
obligations with respect to drawings under Letters of Credit by borrowing Prime
Rate A Revolving Loans hereunder in accordance with Section 3.C, and the
Borrowers irrevocably authorize the Agent to disburse Prime Rate A Revolving
Loans in order to satisfy said reimbursement obligations.

     (e)    Change in Law. If the Agent or any Lender shall determine in good
faith that any change in any applicable law, regulation or guideline (including,
without limitation, Regulation D of the Board of Governors of the Federal
Reserve System) or any new law, regulation or guideline, or any interpretation
of any of the foregoing by any governmental authority charged with the
administration thereof or any central bank or other fiscal, monetary of other
authority 

                                       53

   23

having jurisdiction over such Lender (whether or not having the force of law)
shall:

            (i)   impose, modify or deem applicable any reserve, special deposit
     or similar requirements against the Letters of Credit, or the Agent's or
     such Lender's or any Borrower's liability with respect thereto; or

            (ii)  impose on the Agent or such Lender any penalty with respect to
     the foregoing or any other condition regarding this Agreement, the
     Applications or the Letters of Credit;

and the Agent or such Lender shall determine in good faith that the result of
any of the foregoing is to increase the cost (whether by incurring a cost or
adding to a cost) to the Agent or such Lender of issuing or maintaining or
participating in the Letters of Credit hereunder, then the Agent or such Lender
shall use its best efforts to give the Borrowers prompt notice thereof and the
Borrowers shall pay on demand to the Agent or such Lender from time to time as
specified by the Agent or such Lender such additional amounts as the Agent or
such Lender shall reasonably determine are sufficient to compensate and
indemnify it (computed commencing on the effective date of any event mentioned
herein) for such increased cost. If the Agent or a Lender makes such a claim for
compensation, it shall provide to the Borrowers a certificate setting forth such
increased costs as a result of any event mentioned herein and such certificate
shall be prima facie evidence as to the amount thereof.

     (f)    Absolute Nature of Obligations. The obligation of Borrowers to
reimburse the Agent, and of Lenders to make payment to the Agent, with respect
to Letters of Credit shall be irrevocable and shall not be subject to any
qualification or exception whatsoever and shall be made in accordance with the
terms and conditions of this Agreement under all circumstances, including,
without limitation, any of the following circumstances:

            (i)   Any lack of validity or enforceability of this Agreement, 
     any Letter of Credit or any of the other Loan Documents;

            (ii)  The existence of any claim, setoff, defense or other right
     which any Borrower may have at any time against a beneficiary named in a
     Letter of Credit or any transferee of any Letter of Credit (or any Person
     for whom any such transferee may be acting), the Agent, any Lender or any
     other Person, whether in connection with this Agreement, any Letter of
     Credit, the transactions contemplated herein or any unrelated transactions
     (including any underlying transactions between any Borrower and the
     beneficiary named in any Letter of Credit);

            (iii) Any draft, certificate or any other document presented under a
     Letter of Credit proving to be forged, fraudulent, invalid or insufficient
     in any respect or any statement therein being untrue or inaccurate in any
     respect;

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   24

            (iv)  The surrender or impairment of any security for the
     performance or observance of any of the terms of any of the Loan Documents;

            (v)   Payment by the Agent under any Letter of Credit against
     presentation of a demand, draft or certificate or other document which does
     not comply with the terms of such Letter of Credit; provided, that such
     payment does not constitute gross negligence or willful misconduct of the
     Agent; or

            (vi)  Any other circumstance or happening whatsoever which would
     give rise to a defense against payment or is similar to any of the
     foregoing.

     (g) Participation in Letters of Credit. Each Lender shall participate on a
pro rata basis in the Letters of Credit issued by the Agent, which participation
shall automatically arise upon the issuance of each Letter of Credit. Each
Lender unconditionally agrees that in the event the Borrowers do not reimburse
the Agent by the time such reimbursement is due (as set forth in subsection (d)
above) for the amount paid by the Agent on any draft presented under a Letter of
Credit, then in that event such Lender shall pay to the Agent that portion of
the amount of each draft so paid by the Agent which is equal to the same
percentage of the amount so paid as the percentage which its A Revolving
Commitment bears to the aggregate of the A Revolving Commitments and in return
such Lender shall automatically receive an equivalent percentage participation
in the rights of the Agent to obtain reimbursement from the Borrowers for the
amount of such draft, together with interest thereon as provided for herein. In
the event that any Lender fails to honor its obligation to reimburse the Agent
for its pro rata share of the amount of any such draft, then in that event (i)
each other Lender may, but shall not be obligated to, pay to the Agent its pro
rata share of the payment due the Agent from the defaulting Lender (provided
that no Lender shall be required to make such payment to the extent that the
payment, when taken together with the amount outstanding to such Lender under
the A Revolving Commitment, would exceed such Lender's A Revolving Commitment),
(ii) the defaulting Lender shall have no right to participate in any recoveries
from the Borrowers in respect of such draft, and (iii) all amounts to which the
defaulting Lender would otherwise be entitled under the terms of this Agreement
shall first be applied to reimbursing any such Lender's making payments to the
Agent under clause (i) above for their respective pro rata shares of the
defaulting Lender's portion of the draft, together with interest thereon at the
rate provided for in subsection (d) above. Upon reimbursement to such Lenders
pursuant to clause (iii) above of the amount advanced by them to the Agent in
respect of the defaulting Lender's share of the draft, together with interest
thereon, the defaulting Lender shall thereupon be entitled to its participation
in the Agent's rights of recovery against the Borrowers in respect of the draft
paid by the Agent.

SECTION 3. GENERAL PROVISIONS APPLICABLE TO ALL LOANS.

     Section 3.A. Applicable Interest Rates. The Borrowers may elect that each
Borrowing of each type of Loans be made by means of a Prime Rate Loan or a LIBOR
Loan; provided, however, that there shall not be more than five Borrowings of
LIBOR Loans outstanding at any 

                                       55

   25

time.

     (a) Prime Rate Loans. Each Prime Rate Loan by the Lenders shall bear
interest (computed on the basis of a year of 360 days and actual days elapsed)
on the unpaid principal amount thereof from the date such Loan is made until
maturity (whether by acceleration or otherwise) at a rate per annum equal to the
Prime Rate from time to time in effect plus the Applicable Margin. Interest on
all Prime Rate Loans is payable on the last day of each calendar quarter and at
maturity (whether by acceleration or otherwise), commencing December 31, 1998.

     (b) LIBOR Loans. Each LIBOR Loan made by the Lenders shall bear interest
(computed on the basis of a year of 360 days and actual days elapsed) on the
unpaid principal amount thereof from the date such Loan is made until maturity
(whether by acceleration or otherwise) at a rate per annum equal to the sum of
the Applicable LIBOR Margin plus the Adjusted LIBOR, payable on the last day of
the applicable Interest Period and at maturity (whether by acceleration or
otherwise), and, if the applicable Interest Period is longer than three months,
on each day occurring every three months after the date such Loan is made.

     "Adjusted LIBOR" means, for any Borrowing of LIBOR Loans, a rate per annum
determined in accordance with the following formula:

                                           LIBOR   
                                -----------------------------    
         Adjusted LIBOR=   100%-Eurodollar Reserve Percentage

     "LIBOR" means, for an Interest Period for a Borrowing of LIBOR Loans, the
rate of interest per annum (rounded upwards, if necessary, to nearest 1/100 of
1%) at which deposits in U.S. dollars in immediately available funds are offered
by the Agent or the Reference Bank at approximately 11:00 a.m. (London, England
time) two (2) Business Days before the beginning of such Interest Period by
prime banks in the interbank eurodollar market for a period equal to such
Interest Period and in an amount equal or comparable to the principal amount of
the LIBOR Loan scheduled to be made by the Lenders as part of such borrowing.

     "Eurodollar Reserve Percentage" means, for any Borrowing of LIBOR Loans,
the daily average for the applicable Interest Period of the maximum rate at
which reserves (including, without limitation, any supplemental, marginal and
emergency reserves) are imposed during such Interest Period by the Board of
Governors of the Federal Reserve System (or any successor) under Regulation D on
"eurocurrency liabilities", as defined in such Board's Regulation D, (or in
respect of any other category of liabilities that includes deposits by reference
to which the interest rate on LIBOR Loans is determined or any category of
extension of credit or other assets that include loans by non-United States
offices of any Lender to United States residents) subject to any amendments of
such reserve requirement by such Board or its successor, taking into account any
transitional adjustments thereto. For purposes of this definition, the LIBOR
Loans shall be deemed to be "eurocurrency liabilities" as defined in 
Regulation D.

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   26

         (c) Margin, Rate and Fee Determinations. The Agent shall determine each
interest rate applicable to the Loans hereunder, and each rate applicable to
Revolving Commitment Fees due under Section 4.A. hereof ("Fee Rate"), and its
determination thereof shall be conclusive and binding except in the case of
error. Not later than fifteen (15) days after the Agent's receipt of the
quarterly financial statements required by Section 8.A.2 hereof for a given
fiscal quarter and (unless the Required Lenders in their sole discretion do not
so require) a letter from the Borrowers requesting a change in the Applicable
Margin, Applicable L/C Margin and Applicable LIBOR Margin (collectively, the
"Margins"), and/or a change in the Fee Rate, accompanied by a certificate signed
by the chief financial officer of Stericycle computing the Cash Flow Leverage
Ratio as of the close of the most recently completed fiscal quarter, the Agent
shall determine whether such financial information indicates such a change in
the Cash Flow Leverage Ratio as would justify a change in the Margins or in the
Fee Rate and shall then notify the Borrowers and the Lenders of such
determination and of any change in the Margins or in the Fee Rate resulting
therefrom. Any change in the Margins or in the Fee Rate shall be effective
retroactively as of the close of the most recently completed fiscal quarter
(with any additional payment or refund of interest or Letter of Credit fees or
Revolving Commitment Fees to be made within five (5) Business Days after the
date the Agent so notifies the Borrowers and the Lenders of such change) and
with such new Margins or in the Fee Rate to continue in effect until the
effectiveness of the next redetermination thereof. Any determination by the
Agent of the Leverage Ratio shall be conclusive and binding upon the Borrowers
and the Lenders provided that it has been made reasonably and in good faith. If
the Borrowers fail to timely submit the quarterly financial statements, letter
and certificate referred to above, the Margins and Fee Rate as of the close of
the most recently completed calendar quarter shall be the highest Margins and
Fee Rate indicated.

         Section 3.B. Minimum and Maximum Borrowing Amounts. Each Borrowing of
Prime Rate Loans (other than an L/C Refinancing Borrowing) shall be in an amount
not less than $500,000 or any larger amount that is an integral multiple of
$100,000. Each Borrowing of LIBOR Loans shall be in an amount not less than
$500,000, or any larger amount that is an integral multiple of $100,000.

         Section 3.C. Borrowing Procedures.

         (a) Notice to the Agent. The Borrowers shall give telephonic or
telecopy notice to the Agent in the form attached hereto as Exhibit D (the
"Borrowing Notice") (which notice shall be irrevocable once given and, if by
telephone, shall be promptly confirmed in writing) by no later than 12:00 noon
(Chicago time) (i) on the date at least three (3) Business Days prior to the
date of each requested Borrowing of LIBOR Loans and (ii) on the date of any
requested Borrowing of Prime Rate Loans. Each such notice shall specify the date
of the requested Borrowing (which shall be a Business Day), the amount of the
requested Borrowing, the type of Loans to comprise such Borrowing (if no
election as to type of Borrowing is specified in any such notice, then the
requested Borrowing shall be of Prime Rate Loans) and, if such Borrowing is to
be comprised of LIBOR Loans, the Interest Period applicable thereto. The
Borrowers agree that the Agent may rely on any such telephonic or telecopy
notice given by any person the

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   27

Agent in good faith believes is an Authorized Officer without the necessity of
independent investigation and in the event any notice by such means conflicts
with the written confirmation, such notice shall govern if the Agent has acted
in reliance thereon.

         (b) Borrowers' Failure to Notify. In the event the Borrowers fail to
give notice pursuant to Section 3.C(a) above of the reborrowing of the principal
amount of any maturing Borrowing or of a Borrowing to refinance a reimbursement
obligation with respect to a Letter of Credit (an "L/C Refinancing Borrowing")
and has not notified the Agent by 12:00 noon (Chicago time) on the day such
Borrowing matures or such reimbursement obligation becomes due that it intends
to repay such Borrowing or such reimbursement obligation with funds not borrowed
hereunder, the Borrowers shall be deemed to have requested a Borrowing of Prime
Rate Loans on such day in the amount of the maturing Borrowing or of the
reimbursement obligation then due, in each case subject to Section 6.C hereof,
which new Borrowing shall be applied to pay, as the case may be, the maturing
Borrowing or reimbursement obligation then due.

         (c) Disbursement of Loans. Not later than 2:00 p.m. (Chicago time) on
the date of any Borrowing (a "Funding Date") of LIBOR Loans or Prime Rate Loans,
each Lender shall make available its Loan in funds immediately available in
Chicago, Illinois, at the principal office of the Agent, except to the extent
such Borrowing is either a reborrowing, in whole or in part, of the principal
amount of a maturing Borrowing of Loans (a "Refunding Borrowing") or an L/C
Refinancing Borrowing, in which case each Lender shall record the Loan made by
it as a part of such Refunding Borrowing or L/C Refinancing Borrowing, as the
case may be, on its books or records or on a schedule to the appropriate Note,
as provided in Section 3.H(b) hereof, and shall effect the repayment, in whole
or in part, as appropriate, of its maturing Loan or reimbursement obligation
through the proceeds of such new Loan. Subject to Section 6 hereof, the Agent
shall make the proceeds of each Borrowing available to the Borrowers at the
Agent's principal office in Chicago, Illinois.

         Unless the Agent shall have been notified by a Lender (no later than
5:00 p.m. (Chicago time) on the Business Day preceding the date of a requested
Borrowing of LIBOR Loans and no later than 1:00 p.m. (Chicago time) on the date
of a requested Borrowing of Prime Rate Loans), that such Lender does not intend
to make available to the Agent such Lender's pro rata share of Borrowings as
aforesaid, the Agent may assume that such Lender has made such amount available
to the Agent and the Agent, it its sole discretion, may but need not make
available to the Borrowers a corresponding amount. If such corresponding amount
is not in fact made available to the Agent by such Lender on or prior to a
Funding Date, such Lender agrees to pay and Borrowers agree to repay the Agent
forthwith on demand such corresponding amount together with interest thereon,
for each day from the date such amount is made available to Borrowers until the
date such amount is paid or repaid to the Agent, at (i) in the case of such
Lender, the Federal Funds Rate (together with such other compensatory amounts as
may be required to be paid by such Lender to the Agent pursuant to the rules for
Interbank Compensation of the Council on International Banking or the
Clearinghouse Compensation Committee, as the case may be, as in effect from time
to time), and (ii) in the case of the Borrowers, the interest rate 

                                       58
   28

applicable at the time to the Borrowing made on such Funding Date. If such
Lender shall pay to the Agent such corresponding amount, such amount so paid
shall constitute such Lender's pro rata share of such Borrowing, and if both
such Lender and the Borrowers shall have paid and repaid, respectively, such
corresponding amount, the Agent shall promptly return to the Borrowers such
corresponding amount in same day funds. Nothing in this Section shall be deemed
to relieve any Lender of its obligation hereunder to make its pro rata share of
Loans on the requested date of Borrowing, nor shall any Lender be responsible
for the failure of any other Lender to perform its obligations to make any Loan
hereunder, and the Commitment of any Lender shall not be increased or decreased
as a result of the failure by any other Lender to perform its obligation to make
a Loan. In the event that, at any time when no Event of Default exists
hereunder, and the applicable conditions for funding set forth hereunder have
been satisfied, a Lender for any reason fails or refuses to fund its pro rata
share of a Loan (the funded portion of such Loan being hereinafter referred to
as a "Non Pro Rata Loan" and such Lender being hereinafter referred to as a
"Defaulting Lender"), then, until such time as such Defaulting Lender has funded
its portion of the Loan which was previously a Non Pro Rata Loan, or all other
Lenders have received payment in full (whether by repayment or prepayment) of
the principal and interest due in respect of such Non Pro Rata Loan, all of the
Obligations owing to such Defaulting Lender hereunder shall be subordinated in
right of payment, as provided in the following sentence, to the prior payment in
full of all principal, interest and fees in respect of all Non Pro Rata Loans in
which the Defaulting Lender has not funded its pro rata share (such principal,
interest and fees being referred to as "Senior Loans"). All amounts paid by
Borrowers and otherwise due to be applied to the obligations owing to the
Defaulting Lender pursuant to the terms hereof shall be distributed by Agent to
the other Lenders in accordance with their respective pro rata shares
(recalculated for purposes hereof to exclude the Defaulting Lender's
Commitment), until all Senior Loans have been paid in full. This provision
governs only the relationship among Agent, the Defaulting Lender, and the other
Lenders; nothing hereunder shall limit the obligation of Borrowers to repay all
Loans in accordance with the terms of this Agreement. Notwithstanding anything
in this Agreement to the contrary, the provisions of this section shall apply
and be effective regardless of whether an Event of Default occurs and is then
continuing, and notwithstanding any instruction of Borrowers as to its desired
application of payments. In addition, no unused commitment fee shall accrue in
favor of, or be payable to, such Defaulting Lender from the date of such failure
to fund until such failure has been cured.

         (d) Notice to Lenders. The Agent shall give prompt telephonic, telex or
telecopy notice to each of the Lenders of any Borrowing Notice received pursuant
to Section 3.C(a) above and, if such notice requests the Lenders to make LIBOR
Loans, the Agent shall give notice to the Borrowers and each of the Lenders by
like means of the interest rate applicable thereto promptly after the Agent has
made such determination. The Agent shall promptly confirm in writing (including
by telex or telecopy) any such notice provided by telephone, but the failure to
provide such confirmation shall not affect the obligations of the Borrowers and
the Lenders under this Agreement.

         Section 3.D. Interest Periods. As provided in Section 3.C hereof, at
the time of each 

                                       59
   29

request for the Borrowing of LIBOR Loans hereunder the Borrowers shall select an
Interest Period applicable to such Loans from among the available options. The
term "Interest Period" means the period commencing on the date a Borrowing of
LIBOR Loans is made and ending on the date, as the Borrowers may select, 1, 2, 3
or 6 months thereafter; provided, however, that:

         (a) the Borrowers may not select an Interest Period that extends beyond
the Termination Date;

         (b) whenever the last day of any Interest Period would otherwise be a
day that is not a Business Day, the last day of such Interest Period shall be
extended to the next succeeding Business Day, provided that, if such extension
would cause the last day of such Interest Period to occur in the following
calendar month, the last day of such Interest Period shall be the immediately
preceding Business Day; and

         (c) for purposes of determining the Interest Period for a Borrowing of
LIBOR Loans, a month means a period starting on one day in a calendar month and
ending on the numerically corresponding day in the next calendar month;
provided, however, that if there is no numerically corresponding day in the
month in which such an Interest Period is to end or if such an Interest Period
begins on the last Business Day of a calendar month, then such Interest Period
shall end on the last Business Day of the calendar month in which such Interest
Period is to end.

         Section 3.E. Maturity of LIBOR Loans. Each LIBOR Loan shall mature and
become due and payable by the Borrowers on the last day of the Interest Period
applicable thereto.

         Section 3.F. Prepayments.

         (a) Generally. The Borrowers shall have the privilege of prepaying
without premium or penalty and in whole or in part (but, if in part, then: (i)
in an amount not less than $100,000 or any larger amount that is an integral
multiple of $50,000 in the case of Prime Rate Loans, and in an amount not less
than $50,000 or any larger amount that is an integral multiple of $100,000 in
the case of LIBOR Loans and (ii) in an amount such that the minimum amount
required for a Borrowing pursuant to Section 3.B hereof remains outstanding) on
any Business Day upon prior notice to the Agent which must be received by the
Agent (which shall advise each Lender thereof promptly thereafter) by no later
than 12:00 noon (Chicago time) on the date of such prepayment in the case of
Prime Rate Loans and by no later than 12:00 noon (Chicago time) on the date
three Business Days in advance of the date of such prepayment in the case of
LIBOR Loans, such prepayment to be made by the payment of the principal amount
to be prepaid and accrued interest thereon and, in the case of LIBOR Loans, any
compensation required by Section 3.J hereof. Partial prepayments of any
outstanding type of Loan shall be applied to the various Borrowings and various
installments of principal thereof in the inverse order of their maturity. No
amounts of principal paid or prepaid on any Term Loan may be reborrowed.

         (b) Reborrowings. Any amount paid or prepaid on the Revolving Loans
before the 

                                       60
   30

Expiration Date or the Conversion Date (as appropriate) may, subject to the
terms and conditions of this Agreement, be borrowed, repaid and borrowed again.

         (c) Mandatory Prepayments. Notwithstanding that no Default or Event of
Default has occurred and is continuing, the Borrowers shall pay to the Agent, as
prepayments on the Loans, within ten (10) days after receipt thereof, 100% of
the Net Cash Proceeds with respect to the sale of any assets permitted under
Section 8.B.8(iii), and 100% of the Net Cash Proceeds with respect to the
issuance of capital stock. Prepayments under this section shall be applied,
first, to the Term Loans if then outstanding, then the B Revolving Loans if then
outstanding, and then to the A Revolving Loans if then outstanding, in each case
in prepayment of installments thereof in the inverse order of maturity.

         Section 3.G. Default Rate. If any Event of Default has occurred and is
continuing, then each Loan or other monetary Obligation shall bear interest,
after as well as before judgment (computed on the basis of a year of 360 days
and actual days elapsed) from the date of such Event of Default until such Loan
or other monetary Obligation is paid in full, payable on demand, at a rate per
annum (the "Default Rate") equal to:

         (a) with respect to any Prime Rate Loan, the sum of two percent (2%)
plus the Prime Rate from time to time in effect plus the highest possible
Applicable Margin applicable to such Loan under the relevant matrix; and

         (b) with respect to any LIBOR Loan, the sum of two percent (2%) plus
the rate of interest in effect thereon at the time of such default until the end
of the Interest Period applicable thereto and, thereafter, at a rate per annum
equal to the sum of two percent (2%) plus the Prime Rate from time to time in
effect plus the highest possible Applicable Margin applicable to such Loan under
the relevant matrix; and

         (c) with respect to other monetary Obligations for which a Default Rate
is not otherwise specified, the sum of two percent (2%) plus the Prime Rate from
time to time in effect plus the highest possible Applicable Margin.

         Section 3.H.  Notes.

         (a) Each Loan made to the Borrowers by a Lender shall be evidenced by a
promissory note of the Borrowers, dated the date hereof, payable to the order of
each Lender in the principal amount of its Commitment, and otherwise be in the
form of Exhibits A through C hereto.

         (b) Each Lender shall record on its books or records or on a schedule
to the appropriate Note the amount of each Loan made by it to the Borrowers, the
Interest Period thereof (if applicable), all payments of principal and interest
and the principal balance from time to time outstanding thereon, the interest
rate applicable thereto, and, in respect of any Loan, the type of such Loan;
provided that prior to the transfer of any Note all such amounts shall be

                                       61
   31

recorded on a schedule to such Note. The record thereof, whether shown on such
books or records of a Lender or on a schedule to any Note, shall be prima facie
evidence as to all such amounts; provided, however, that the failure of any
Lender to record any of the foregoing or any error in any such record shall not
limit or otherwise affect the obligation of the Borrowers to repay all Loans
made hereunder together with accrued interest thereon. At the request of any
Lender and upon such Lender tendering to the Borrowers the Note to be replaced,
the Borrowers shall furnish a new Note to such Lender to replace any outstanding
Note and at such time the first notation appearing on a schedule on the reverse
side of, or attached to, such Note shall set forth the aggregate unpaid
principal amount of all Loans, if any, then outstanding thereon.

         Section 3.I. Revolving Commitment Terminations. The Borrowers shall
have the right at any time and from time to time, upon prior written notice to
the Agent, to terminate without premium or penalty, in whole or in part, any
Revolving Commitment, each such termination (whether in whole or in part) to be
effective as of the close of the calendar quarter specified in such notice
(provided such effective date occurs no earlier than thirty (30) Business Days
after such notice) and each partial termination to be in an amount not less than
$500,000 or any larger amount that is an integral multiple of $250,000 and to
reduce ratably the respective Commitments of each Lender; provided that the
Revolving Commitments may not be reduced to an amount less than the aggregate
principal amount of the utilization then outstanding thereunder. Any termination
of Commitments pursuant to this Section 3.I may not be reinstated.

         Section 3.J. Funding Indemnity. In the event any Lender shall incur any
loss, cost or expense (including, without limitation, any loss of profit, and
any loss, cost or expense incurred by reason of the liquidation or re-employment
of deposits or other funds acquired by such Lender to fund or maintain any LIBOR
Loan or the relending or reinvesting of such deposits or amounts paid or prepaid
to such Lender) as a result of:

         (a) any payment (including prepayment) of a LIBOR Loan on a date other
than the last day of its Interest Period for any reason, whether before or after
default, and whether or not such payment is required by any provisions of this
Agreement, or

         (b) any failure (because of a failure to meet the conditions of Section
6 or otherwise) by the Borrowers to borrow a LIBOR Loan on the date specified in
a notice given pursuant to Section 3.C hereof,

then, upon the demand of such Lender, the Borrowers shall pay to such Lender
such amount as will reimburse such Lender for such loss, cost or expense. If any
Lender makes such a claim for compensation, it shall provide to the Borrowers,
with a copy to the Agent, a certificate executed by an officer of such Lender
setting forth the amount of such loss, cost or expense in reasonable detail
(including an explanation of the basis for and the computation of such loss,
cost or expense) and the amounts shown on such certificate shall be deemed
rebuttably presumptive evidence of the correctness thereof.

                                       62
   32

         Section 3.K.  Change in Circumstances, Etc.

         (a) Change of Law. Notwithstanding any other provisions of this
Agreement or any Note, if at any time after the date hereof any change in
applicable Law or in the interpretation thereof makes it unlawful for any Lender
to make or continue to maintain LIBOR Loans or to give effect to its obligations
as contemplated hereby, such Lender shall promptly give notice thereof to the
Borrowers, with a copy to the Agent, and such Lender's obligations to make or
maintain LIBOR Loans under this Agreement shall terminate until it is no longer
unlawful for such Lender to make or maintain LIBOR Loans. The Borrowers shall
prepay on demand the outstanding principal amount of any such affected LIBOR
Loans, together with all interest accrued thereon and all other amounts then due
and payable to such Lender under this Agreement; provided, however, subject to
all of the terms and conditions of this Agreement, the Borrowers may then elect
to borrow the principal amount of the affected LIBOR Loan from such Lender that
shall not be made ratably by the Lenders but only from such affected Lender by
means of a Prime Rate Loan from such Lender.

         (b) Unavailability of Deposits or Inability to Ascertain, or Inadequacy
of, LIBOR. If on or prior to the first day of any Interest Period for any
Borrowing of LIBOR Loans:

             (i) the Agent advises the Borrowers that deposits in United States
Dollars (in the applicable amounts) are not being offered to it or the Reference
Bank in the interbank eurodollar market, for such Interest Period, or

             (ii) Lenders having 50% or more of the aggregate amount of the
Commitments advise the Agent that LIBOR as determined by the Agent will not
adequately and fairly reflect the cost to such Lenders of funding their LIBOR
Loans for such Interest Period, then, the Agent shall forthwith give notice
thereof to the Borrowers and the Lenders, whereupon until the Agent notifies the
Borrowers that the circumstances giving rise to such suspension no longer exist,
the obligation of the Lenders to make LIBOR Loans shall be suspended.

         (c) Increased Cost and Reduced Return.

             (1) If on or after the date hereof, the adoption of any applicable
Law, or any change therein, or any change in the interpretation or
administration thereof by any governmental authority, central bank or comparable
agency charged with the interpretation or administration thereof, or compliance
by any Lender with any request or directive (whether or not having the force of
law) of any such authority, central bank or comparable agency:

                 (i) shall subject any Lender to any tax, duty or other charge
             with respect to the Loans, its Notes or its obligation to make
             Loans, or shall change the basis of taxation of payments of any
             Lender of the principal of or interest on the Loans or any other
             amounts due under this Agreement in respect of its Loans or its
             obligation to make Loans (except for changes in the rate of tax on
             the overall 

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             net income of such Lender imposed by the jurisdiction in which
             such Lender's principal executive office is located); or

                 (ii) shall impose, modify or deem applicable any reserve,
             special deposition or similar requirement (including, without
             limitation, any such requirement imposed by the Board of Governors
             of the Federal Reserve System, but excluding with respect to any
             LIBOR Loans any such requirement included in an applicable
             Eurodollar Reserve Percentage) against assets of, deposits with or
             for the account of, or credit extended by, any Lender or shall
             impose on any Lender or on the interbank market any other condition
             affecting the Loans, its Notes or Lender's obligation to make
             Loans;

and the result of any of the foregoing is to increase the cost to such Lender of
making or maintaining any Loan, or to reduce the amount of any sum received or
receivable by such Lender under this Agreement or under its Notes with respect
thereto, by an amount deemed by such Lender to be material, then, within fifteen
(15) days after demand by such Lender (with a copy to the Agent), the Borrowers
shall be obligated to pay such Lender such additional amount or amounts as will
compensate such Lender for such increased cost or reduction (computed commencing
on the effective date of any event mentioned herein). Each Lender agrees to use
its best efforts to give the Borrowers notice of the occurrence of any event
mentioned herein.

         (2) If any Lender shall determine that the adoption after the date
hereof of any applicable Law regarding capital adequacy, or any change in any
existing Law, or any change in the interpretation or administration thereof by
any governmental authority, central bank or comparable agency charged with the
interpretation or administration thereof, or compliance by such Lender (or any
of its branches or any corporation controlling such Lender (or any of its
branches or any corporation controlling such Lender) with any request or
directive regarding capital adequacy (whether or not having the force of law) of
any such authority, central bank or comparable agency, has or would have the
effect of reducing the rate of return on such Lender's or such corporation's
capital, as the case may be, as a consequence of Lender's obligations hereunder
or for the credit which is the subject matter hereof to a level below that which
such Lender or such corporation could have achieved but for such adoption,
change or compliance (taking into consideration such Lender's or such
corporation's policies with respect to liquidity and capital adequacy) by an
amount deemed by such Lender to be material, then from time to time, within
fifteen (15) days after demand by such Lender, the Borrowers shall pay to such
Lender such additional amount or amounts reasonably determined by such Lender as
will compensate such Lender for the reduction.

         (d) Discretion of Lender as to Manner of Funding. Notwithstanding any
other provision of this Agreement, each Lender shall be entitled to fund and
maintain its funding of all or any part of its Loans in any manner it sees fit,
it being understood, however, that for the purposes of this Agreement all
determinations hereunder shall be made as if each Lender had actually funded and
maintained each LIBOR Loan through the purchase of deposits in the

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relevant market having a maturity corresponding to such Loan's Interest Period
and bearing an interest rate equal to LIBOR, for such Interest Period.

         (e) Implementation of European Economic and Monetary Union ("EMU").
This Agreement (including, without limitation, the definition of LIBOR and
related definitions) will be amended to the extent determined by the Agent
(acting reasonably and in consultation with the Borrowers and the Lenders) to be
necessary to reflect implementation of the EMU and change in currency and to put
the Lenders and the Borrowers in the same position, so far as possible, that
they would have been in if such implementation and change in currency had not
occurred.

         (f) Lending Offices. Each Lender may, at its option, elect to make its
Loans hereunder at the branch, office or affiliate specified on the appropriate
signature page hereof (each a "Lending Office") for each type of Loan available
hereunder or at such other of its branches, offices or affiliates as it may from
time to time elect and designate in a notice to the Borrowers and the Agent.

SECTION 4.  FEES.

         Section 4.A. Revolving Commitment Fees. The Borrowers shall pay to the
Agent for the ratable account of the Lenders a commitment fee at the initial
rate of .25% per annum with respect to the A Revolving Commitment and the B
Revolving Commitment (computed on the basis of a year of 360 days and the actual
number of days elapsed) on the average daily unused amount of the respective
Revolving Commitment hereunder ("Commitment Fees") provided, however, that the
Commitment Fees shall be subject to quarterly adjustment beginning with the
fiscal quarter commencing January 1, 1999 based on the following matrix:

            Cash Flow                       Commitment Fee on A and
         Leverage Ratio                     B Revolving Commitments
         --------------                     -----------------------
                                                    
         Equal to or less                            0.25%
         than 2.0:1.00

         2.01:1.00 through
         2.50:1.00                                   0.25%

         2.51:1.00 through
         2.75:1.00                                   0.25%

         2.76:1.00 or
         greater                                    0.375%

         For purposes of this Section 4.A., Letter of Credit Utilization shall
         constitute a usage of the A Revolving Commitment for purposes of
         computing the commitment fee payable

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   35

         hereunder. Such commitment fees are payable in arrears on the last day
         of each March, June, September and December occurring after the date
         hereof (commencing December 31, 1998) and on the Expiration Date,
         unless either of the Revolving Commitments terminates in whole on an
         earlier date, in which event the fees for the period to the date of
         such termination in whole shall be paid on the date of such
         termination.

         Section 4.B. Closing Fee. The Borrowers shall pay to the Agent for its
own account on the Closing Date a fee described in a letter dated the date
hereof between Agent and Borrowers (the "Closing Fee").

         Section 4.C. Letter of Credit Fees. On the last day of each March,
June, September and December occurring after the date hereof (commencing
December 31, 1998) and on the Expiration Date, the Borrowers shall pay to the
Agent for the ratable account of the Lenders a fee at the rate equal to the
Applicable L/C Margin per annum (computed on the basis of a year of 360 days and
the actual number of days elapsed) on the average daily Stated Amount under
Letters of Credit outstanding during the calendar quarter ending on such date.

         Section 4.D. Transaction Charges. The Borrowers shall pay to the Agent
for its own account such issuing and processing fees and charges as the Agent
from time to time customarily imposes in connection with the issuance,
amendment, cancellation, negotiation and payment of letters of credit and drafts
drawn thereunder, such fees to be paid in accord with the standard and customary
practices of the Agent.

         Section 4.E. Agent's Fees. The Borrowers shall from time to time pay
the Agent for its own use and benefit such fees as the Borrowers and the Agent
have mutually agreed upon.

SECTION 5.  PLACE AND APPLICATION OF PAYMENTS.

         Section 5.A. Place and Application of Payments. All payments of
principal of and interest on the Loans, reimbursement obligations with respect
to Letters of Credit and all payments of fees and all other amounts payable
under this Agreement shall be made to the Agent no later than 12:00 Noon
(Chicago time) at the principal office of the Agent in Chicago, Illinois (or
such other location in the State of Illinois as the Agent may designate to the
Borrowers for the benefit of the Lenders). Any payments received after such time
shall be deemed to have been received by the Agent on the next Business Day. All
such payments shall be made in lawful money of the United States of America, in
immediately available funds at the place of payment, without setoff or
counterclaim. The Agent will promptly thereafter cause to be distributed like
funds relating to the payment of principal or interest on Loans, reimbursement
obligations with respect to Letters of Credit or fees ratably to the Lenders and
like funds relating to the payment of any other amount payable to any Lender to
such Lender, in each case to be applied in accordance with the terms of this
Agreement. Alternatively, at its sole discretion, the Agent may charge against
or debit any deposit account or other Monies of any Borrower on deposit with or
in possession of the Agent (except any Monies of any Borrower at any time on
deposit with the

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   36

Agent collateralizing any Letters of Credit), all or any part of any amount due
hereunder or under the Notes. The Agent's right from time to time after the
occurrence or happening of an Event of Default hereunder (which has not been
cured or waived in a writing signed by the Agent) to set off indebtedness owing
by Borrowers to the Agent against any Borrower's Monies, deposits, credits,
accounts or other property now or at any time in the possession or control of
the Agent, except as provided herein, is hereby acknowledged and agreed to by
the Borrowers.

SECTION 6.  CONDITIONS PRECEDENT AND SUBSEQUENT.

         Notwithstanding any other provisions of this Agreement, the Lenders, at
their sole option and in their sole discretion, need not make any Loans to the
Borrowers or issue any Letter of Credit for the account of the Borrowers, unless
the conditions precedent described below are fulfilled:

         Section 6.A. Delivery of Documents as Conditions Precedent. The
delivery of each of the following documents, each of which shall be reasonably
satisfactory to the Agent in substance and form, by on or behalf of the
Borrowers to the Agent shall constitute separate and distinct conditions
precedent to the effectiveness of this Agreement and the making of any Loans or
issuance of any Letters of Credit:

         6.A.1.   Agreement.  A copy of this Agreement duly executed by 
Borrowers.

         6.A.2. Notes. The Revolving Notes dated as of the Closing Date duly
executed by the Borrowers and payable to the respective Lenders.

         6.A.3. Stock Pledge Agreement. The Stock Pledge Agreement duly executed
by Stericycle and the other Pledgors, together with the stock certificates for
the Pledged Shares and duly executed stock powers or assignments endorsed in
blank, and appropriate UCC-1 financing statements from the respective Pledgors
for filing with the appropriate Secretary of State.

         6.A.4. Environmental Indemnity Agreement. The Environmental Indemnity
Agreement duly executed by the Borrowers.

         6.A.5. Security Agreement, Intellectual Property Assignment, Collateral
Assignment of Notes, and Acquisition Agreement Assignment. The Security
Agreement duly executed by the Borrowers, the Intellectual Property Assignment,
the Collateral Assignment of Notes, and the Acquisition Agreement Assignment.

         6.A.6. Financing Statements. UCC-1 financing statements executed by the
Borrowers for filing with the offices indicated on Schedule 6.A.6 hereto, and
such other financing statements or fixture filings as the Agent may request from
the Borrowers from time to time.

         6.A.7. UCC and Other Search Results. Satisfactory UCC financing
statement, judgment 

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   37

and tax lien search results of the Borrowers from or of the offices indicated on
Schedule 6.A.7 hereto, and from such other offices or governmental agencies or
bodies as the Agent, in its sole discretion, may request from time to time,
indicating that any financing statements to be filed by the Agent or described
above, after being duly and properly filed and recorded, will give the Agent
first priority perfected liens and security interests on and in the Collateral
of the Borrowers, except by reason of Permitted Liens, and that there are no
other lienors or creditors claiming any interest in the Collateral of the
Borrowers, except holders of Permitted Liens.

         6.A.8. Evidence of Insurance. Evidence that the Borrowers have
insurance as required by Section 8.A.16, including property, casualty and
liability insurance satisfactory to the Agent, together with: (i) loss
payable/mortgagee endorsements naming the Agent as loss payee and mortgagee with
respect to property and casualty insurance covering Collateral; and (ii)
certificate(s) of insurance(s) and binder(s) naming the Agent and the Lenders as
additional insured with respect to liability insurance.

         6.A.9. Certificates of Incorporation. Certificates of Incorporation,
and each and every amendment thereto, of each Borrower, certified of recent date
by the Secretary of State or appropriate government official in each State or
country in which each such Borrower is incorporated.

         6.A.10. Good Standing. Certificate of the appropriate Secretary of
State or government official of recent date, as to the good standing of each
Borrower in the State or country of its incorporation and where it is qualified
to do business.

         6.A.11. Secretary's Certificates. Certificate of Secretary of each
Borrower as to (i) resolutions authorizing entry into, execution, delivery and
performance of its obligations under this Agreement and related Loan Documents
to which it is a party, (ii) the incumbency and signatures of the officers
authorized to execute on its behalf the Loan Documents to which it is a party,
(iii) its Certificate of Incorporation, and (iv) its bylaws.

         6.A.12. Solvency Certificate. Certificate of Solvency duly executed by
the Borrowers, with pro forma balance sheet and cash flow projections provided
for thereunder.

         6.A.13. Opinion. The satisfactory opinion letter of Johnson and Colmar,
counsel for the Borrowers, dated as of the Closing Date and addressed to the
Agent and the Lenders as to the matters referred to in Sections 7.A., 7.B.,
7.C., 7.D., 7.E., 7.F. (as far as litigation is concerned), 7.J., and the
perfection of the Agent's Liens in the Collateral.

         6.A.14. Environmental Data. All environmental data, information and
reports concerning the Mortgaged Properties or any other property which the
Agent may request.

         6.A.15. Officer's Certificates. A certificate of the President of
Stericycle certifying: (i) that the conditions herein insofar as they relate to
the Borrowers have been satisfied, (ii) as to the 

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truth of the representations and warranties herein contained, and (iii) that no
Materially Adverse Effect has occurred since December 31, 1997.

         6.A.16. Mortgages, Etc. The Mortgages, Leasehold Mortgages, and
Collateral Assignment of Leases.

         6.A.17. Pay-Off Letters. Pay-off letters from the holders of all Debt
to be paid or refinanced with Loan proceeds, with any related UCC termination
statements, said pay-off letters to include the acknowledgments of said holders
to the effect that all of its commitments to make any loans to a Borrower are
terminated and that upon receipt of the identified pay-off amounts said holder
will neither have or claim to have any lien rights in any assets of any
Borrower, and will deliver all appropriate release and termination documents.

         6.A.18. Other Documents. In form and substance satisfactory to the
Agent the initial Borrowing Base Certificate and any other documents which the
Agent may reasonably request from or to be delivered by the Borrowers from time
to time to effect the intent of this Agreement and the Loan Documents.

         Section 6.B. Fees. All fees referred to in Section 4 hereof which are
then due shall have been paid to the Agent on the Closing Date.

         Section 6.C. Conditions Precedent. The following conditions are
conditions precedent to the obligation of the Agent and the Lenders to make or
disburse any Loan or issue any Letter of Credit hereunder at any time requested
by the Borrowers, and each request by any Borrower for a Loan or Letter of
Credit hereunder shall be deemed to constitute each Borrower's representation
and warranty to the Agent and the Lenders that, as of the dates of such request
and on which such Loan is disbursed or Letter of Credit issued, these conditions
have been satisfied:

         6.C.1. Materially Adverse Effect. No Materially Adverse Effect shall
have occurred, as determined by the Agent in its reasonable discretion, since
the date hereof.

         6.C.2. Representations and Warranties. The representations and
warranties set forth in Section 7 hereof and in each Loan Document to which any
Borrower is a party shall be true and correct in all material respects.

         6.C.3. Covenants. The affirmative and negative covenants set forth
herein (including, without limitation, those covenants set forth in Section 8
hereof) and in any other Loan Documents to which any Borrower is a party, are
not being breached in any material respects.

         6.C.4. Event of Default. No Default or Event of Default shall have
occurred and then be continuing or would occur as a result of making such Loan
or issuing such Letter of Credit.

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   39

         6.C.5. Revolving Commitments. After giving effect to the Loan (if it is
a Revolving Loan) or Letter of Credit, the aggregate principal amount of all
such Loans and Letter of Credit Utilization outstanding hereunder shall not
exceed the applicable Revolving Commitment.

         6.C.6. No Violations. Such Loan or Letter of Credit shall not violate
any order, judgment or decree of any court or other authority or any provision
of Law applicable to any Lender (including, without limitation, Regulation U of
the Board of Governors of the Federal Reserve System) as then in effect,
provided that if any such circumstances affects fewer than all the Lenders then
the unaffected Lenders shall not be relieved of their obligations to make a Loan
as part of a Refunding Borrowing.

         6.C.7. Notes; Notice of Borrowing. The Agent shall have received for
each Lender the Notes of the Borrowers and the notice required by Section 3.C
hereof.

         Section 6.D. Letters of Credit; B Revolving Loans. As a further
condition to the issuance of each Letter of Credit, the Agent shall have
received a duly completed and executed Application therefor. As further
conditions to the making of any Loan the proceeds of which will be used to
finance an acquisition, the provisions of Sections 8.A.13 and 8.B.3 are complied
with and satisfied.

         Section 6.E. Additional Documents or Events as Conditions Precedent and
Subsequent to WSI Acquisition Loan. The delivery of each of the following
documents to the Agent or, as appropriate, occurrence of the following events
described in Sections 6.E.1, 6.E.2, 6.E.3, 6.E.4 and 6.E.5 either prior to or as
of the execution of this Agreement, shall constitute separate and distinct
conditions precedent to the effectiveness of this Agreement and the making of
any Loans by the Lenders to the Borrowers:

         6.E.1. Acquisition Documents. The Agent shall have received fully
executed copies of each of the Acquisition Documents and true copies of all
material instruments, agreements and documents (including third party consents)
required to be delivered or furnished thereunder or in connection therewith, and
the terms and provisions of said Acquisition Documents shall be satisfactory to
the Agent in substance and in form.

         6.E.2. Consummation of Acquisition. After giving effect to the funding
of the initial B Revolving Loan and the use of proceeds thereof, the
consummation of the Acquisition has occurred simultaneously, and a Certificate
to that effect has been furnished to the Agent by the President of Stericycle.

         6.E.3. Lender Review of Target Financial Statements. The Agent has
received and reviewed acceptable financial statements of the Target, and said
financial statements are satisfactory to the Agent in its reasonable discretion.

         6.E.4. Lender Review of Target Budget, Business Plan and Projections.
The Agent has 

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   40

received and reviewed reasonably acceptable annual budgets, business plans and
rolling five year projections for the Target.

         6.E.5. No Default and Financial Covenant Compliance. The Agent has
received a Certificate of the chief financial officer of Stericycle certifying
that no Default or Event of Default will result from the Acquisition after
giving effect thereto, and also certifying and demonstrating to the reasonable
satisfaction of Agent that after giving effect to the Acquisition that Borrowers
will be in compliance with each of the financial covenants set forth in Section
8A.1 calculated on an Adjusted Historical Pro Forma Basis (as defined in Section
8.B.3).

         6.E.6. Joinder. Immediately upon consummation of the acquisition,
Borrowers (now including WSI) shall comply with the provisions of Section 8.A.13
and, in the Agent's absolute discretion, WSI shall deliver the documents
described in Section 6.A. Compliance with this provision is an express covenant
of the Borrowers, and a Default or Event of Default shall result if Borrowers
(including WSI) do not fully comply with this provision immediately upon
consummation of the Acquisition.

         Section 6.F. Certain Post Closing Matters. The delivery and/or
satisfaction of each of the following is an express covenant of the Borrowers,
and a Default or Event of Default will result if same have not been delivered
and/or satisfied within the time periods indicated:

         6.F.1. Matters Pertaining to Mortgages and Leasehold Mortgages. Within
45 days of the date hereof, the Borrowers shall comply with the following
pertaining to each of the Mortgages and Leasehold Mortgages and properties
covered thereby:

                (a) Environmental Matters. All environmental data, information
and reports concerning the Mortgaged Properties involved as the Agent may
request.

                (b) Surveys. Current surveys of the Mortgaged Properties
involved, which shall contain flood plain certification, prepared in accordance
with the Minimum Standard Detail Requirement for Land and Title Surveys as
adopted by the American Land Title Association the American Congress on
Surveying and Mapping, and prepared and certified to the Agent and title company
by a licensed surveyor or engineer.

                (c) Title Policies. With respect to each Mortgaged Property
involved, an ALTA Loan Policy - 1970 (Amended 10/17/70)(or other form acceptable
to the Agent) title insurance policy or binder issued by a title insurance
company satisfactory to the Agent, in the respective amounts approximating the
market value of the respective Mortgaged Property, insuring or undertaking to
insure, in the case of a binder, that the relevant Mortgage or Leasehold
Mortgage relating thereto creates and constitutes a valid first Lien against
such Mortgaged Property in favor of the Agent, for its benefit and the ratable
benefit of the Lenders, subject to no exceptions other than those acceptable to
the Agent, with such endorsements and affirmative insurance (including
comprehensive endorsement No. 1, survey, revolving credit, contiguity - if

                                       71
   41

applicable, usury, doing business, standard form variable rate, restrictions -
where applicable, encroachment - where applicable, and broad form zoning) as the
Agent may reasonably request; and, if requested by the Agent, copies of all
documents referred to in the title insurance policies and binders.

         6.F.2. Matters Pertaining to Leaseholds. Within 45 days of the date
hereof, the Borrowers shall deliver or use their best efforts in the case of
(b)-(d), the following pertaining to each of the Leaseholds and properties
covered thereby:

                (a) Environmental Matters. All environmental data, information
and reports concerning the properties involved as the Agent may request.

                (b) Landlord's/Lessor's Consent to Collateral Assignment of
Lease. The consent of each Landlord/Lessor involved to the respective Collateral
Assignment of Lease.

                (c) Estoppel Certificate. An estoppel certificate substantially
in the form of Exhibit E hereto.

                (d) Landlord's Lien Waivers. A Landlord's Lien Waiver and
Agreement substantially in the form of Exhibit F hereto.

         6.F.3. [INTENTIONALLY DELETED]

         6.F.4. Satisfactory Completion of Due Diligence. Within 90 days of the
date hereof, the Agent and Lenders have satisfactorily completed their due
diligence examination of the Borrowers, their operations and properties,
including its audit/review of the Collateral, historical and pro forma financial
information, and projections and business plans.

         6.F.5. Other Matters. All other matters included within the Additional
Post-Closing Matters Memo attached as Exhibit G hereto are delivered and/or
satisfied within the time limits set forth therein.

SECTION 7.  REPRESENTATIONS AND WARRANTIES.

         As further inducement to the Agent and the Lenders to enter into this
Agreement and make the Loans and issue Letters of Credit hereunder, the
Borrowers jointly and severally represent and warrant, as of the date hereof,
and as of the date of each disbursement of each of the Loans and the date of
issuance of each Letter of Credit, the following, which shall survive the
execution and delivery of this Agreement, the Notes and the Loan Documents and
until all of the Obligations have been paid, satisfied or discharged in full,
regardless of any investigation by the Agent or the Lenders of the Borrowers'
financial condition or assets:

         Section 7.A. Corporate Existence and Related Matters. Each Borrower is
a corporation 

                                       72
   42

duly organized, validly existing and in good standing under the Laws of the
State or country of its incorporation and is duly qualified to do and transact
business and is in good standing as a foreign corporation in each and every
state or country in which the conduct of its business or the location of its
properties requires such qualification and the failure to so qualify would have
a Materially Adverse Effect. Schedule 7.A attached hereto lists each Borrower
and its relationship to Stericycle. As of the date hereof, the only Subsidiaries
of Stericycle are designated in Schedule 7.A hereto and are Borrowers hereunder.
Schedule 7.A hereto correctly sets forth, as to each such Subsidiary, whether or
not it is a Consolidated Subsidiary, the jurisdiction of its incorporation, the
percentage of issued and outstanding shares of each class of its capital stock
owned by Stericycle and the Subsidiaries and, if such percentage is not 100%, a
description of each class of its authorized capital stock and the number of
shares of each class issued and outstanding. All of the issued and outstanding
shares of capital stock of each Subsidiary are validly issued and outstanding
and fully paid and nonassessable and all such shares indicated in Schedule 7.A
as owned by Stericycle or a Subsidiary are owned, beneficially and of record, by
Stericycle or such Subsidiary, free of any Lien. Schedule 7.A contains all
assumed or business names utilized by each Borrower, the jurisdiction of
incorporation of each Borrower, and all jurisdictions where each Borrower is
qualified to do business. The information in Schedule 7.A hereto is true and
complete.

         Section 7.B. Corporate Authority. Each Borrower has all corporate power
and authority to own its property and assets and to carry on and engage in its
business as it is presently being conducted, and has all licenses, permits,
franchises, consents, approvals and authorizations required in connection with
the foregoing, including without limitation all of the foregoing required under
applicable Laws. The execution, issuance, delivery, and performance of all
documents in connection with this Agreement, the Notes and the Loan and other
Transaction Documents to which any Borrower is a party or signatory and the
incurrence and performance of the Obligations hereunder and thereunder (i) are
within the corporate power and authority of each Borrower, (ii) have been duly
and properly authorized by all necessary corporate, director, shareholder and
any other action of the Borrowers, and (iii) have not resulted in and will not
result in:

         (a) the creation or imposition of any Lien of any nature whatsoever
(except in favor of the Agent) upon any Borrower's property or assets; or

         (b) the violation or contravention of, the occurrence of a default,
event of default or event, which with the passage of time or giving of notice or
both, would constitute, mature into or become a default or event of default
under, (1) any term or provision of a Borrower's Certificate of Incorporation or
bylaws, (2) any licenses, permits, franchises, consents, approvals or
authorizations referred to above, (3) any certificates of authority to do or
transact business, (4) any applicable order of any court or government or
administrative agency, or (5) any material contract, agreement (including any
loan or credit agreement or agreement with the holders of any Borrower's
preferred stock or makers of any Subordinated Loan), mortgage, indenture,
instrument, judgment or Laws to which any Borrower is a party or signatory or by
which it is

                                       73
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 bound.

         Section 7.C. Consents, Approvals, etc. Except for the filing of UCC
financing statements, the filing of appropriate documents with the United States
Patent and Trademark Office to perfect Agent's Liens in registered trademarks
and patents of the Borrowers, any consents of lessors to leasehold mortgages and
collateral assignments, and the notation of Agent's Liens against vehicles of
Borrowers on the certificates of title for such vehicles, no consent, approval
or authorization or order of, or filing, registration or qualification with, any
Person (governmental, regulatory, or otherwise) is required to be obtained or
effected by any Borrower in connection with the execution, issuance, delivery
and performance of all documents in connection with this Agreement, the Notes
and the Loan and other Transaction Documents to which any Borrower is a party or
signatory or the incurrence or performance of the Obligations or, if so
required, has been duly obtained or effected before the date hereof and are
indicated on Schedule 7.C hereto.

         Section 7.D. Binding Effect and Enforceability. Upon delivery hereof
and thereof, this Agreement, the Notes and the Loan and other Transaction
Documents to which any Borrower is a party or signatory will be its respective
legal, valid and binding obligations enforceable in accordance with their
respective terms and provisions (except as limited by bankruptcy, insolvency or
other laws or equitable principles of general application relating to the
enforcement of creditors' rights generally) and, on the date of said delivery,
none of the Borrowers will be in violation or contravention of, and no Default
or Event of Default will exist under, any of the foregoing.

         Section 7.E. Default of Debt, Licenses, Permits, Orders and Other
Agreements. Except for breaches of leases caused by the leasehold mortgages and
collateral assignments of leases required to be delivered hereunder, no Borrower
is in breach or default of (in any material respect), and no event of default or
event, which with the passage of time or giving of notice or both, would
constitute, mature into or become a default or event of default, has occurred
and is continuing with respect to (i) any Debt of any kind or nature, (ii) any
license, permit, franchise, approval, consent or authorization referred to in
Section 7.B above, (iii) any order of any court or governmental or
administrative agency, or (iv) any agreement to which it is a party, which
breach or default might have a Materially Adverse Effect.

         Section 7.F. Financial Condition and Litigation. The Financial
Statements of the Borrowers delivered to the Agent (including, without
limitation, the audited financial statements of Stericycle and Subsidiaries as
of December 31, 1997, the unaudited financial statements of Stericycle and its
Subsidiaries for the period ended June 30, 1998, and unaudited financial
statements for the Target for the years/periods ending December 31, 1997 and
June 30, 1998), have been prepared in accordance with GAAP (except, in the case
of Target's financial statements, as noted in the accountant's review report
dated May 31, 1998, and audit report dated March 11, 1997), are true and correct
in all material respects and fairly present the financial condition of the
Borrowers as at the dates thereof and results of operations for the periods

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covered thereby. Since the ending date of the period covered by the most recent
Financial Statements dated June 30, 1998, delivered to the Agent and received
thereby, no Materially Adverse Effect has occurred and no dividends on or
redemptions of any of the Borrowers' common or preferred stock have been made.
Except as disclosed to the Agent on said most recent Financial Statements or as
otherwise set forth or mentioned in the Registration Statement: (i) the
Borrowers have no Debt, except as permitted hereunder, or liabilities,
contingent or otherwise; and (ii) except as disclosed in the Registration
Statement or on Schedule 7.F, no proceedings, suits, orders, claims,
investigations, or other actions are pending before any court or governmental
authority or, to the best knowledge of Borrowers, threatened against any
Borrower that are not fully covered by insurance. With respect to any
representation and warranty which is deemed to be made after the date hereof by
the Borrowers, the Financial Statements which as of such date shall most
recently have been furnished by the Borrowers to the Agent and the Lenders for
purposes of or in connection with this Agreement shall have been prepared in
accordance with GAAP, shall be true and correct in all material respects, and
shall fairly present the financial condition of the Borrowers as of the dates
thereof and results of operations for the periods covered thereby.

         Section 7.G. Title and Liens. Each Borrower has good and marketable
title to all of its property and assets, including all such property and assets
listed on the most recent Financial Statements, the Mortgaged Properties, and
the other Collateral (except as thereafter disposed of in accordance with and as
permitted by the Security Agreement) and, except as set forth on Schedule 7.G,
the Collateral is not subject to any liens, claims, security interests,
mortgages, pledges, charges or other encumbrance of any Person, except the Agent
and holders of the Permitted Liens.

         Section 7.H. Employee Plans. All of the Borrowers' Employee Plans are
listed on Schedule 7.H hereto and are in material compliance with all provisions
of ERISA and meet the minimum funding standards of Section 302 of ERISA where
applicable. No withdrawal liability has been incurred under any such Employee
Plans. No Prohibited Transaction or Reportable Event, as defined in ERISA, has
occurred with respect to any such Employee Plans. No proceedings have been
instituted to terminate or appoint a trustee to administer any such Employee
Plans.

         Section 7.I. Taxes. The Borrowers have filed all federal, state and
local tax returns and reports required by Law, have paid all taxes, assessments,
penalties, interest and any other governmental charges which are or were due and
payable, have made adequate provision for the payment of all taxes, assessments,
penalties, interest and other governmental charges which are accruing but are
not yet due and payable, and, except as listed on Schedule 7.I. hereto, have no
knowledge and are not aware of any deficiency or additional assessment which may
have or has arisen in connection of the foregoing.

         Section 7.J. Compliance with Laws. Each Borrower hereby makes each and
every representation and warranty contained in the Environmental Indemnity
Agreement, which is 

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incorporated herein by this reference as if set forth herein in full. Except as
otherwise represented or provided in the Environmental Indemnity Agreement or as
expressly referred to in the Registration Statement, to the best knowledge of
each Borrower, each Borrower has complied in all material respects with all Laws
applicable to it or to the conduct of its business, noncompliance with which
could have a Materially Adverse Effect, and no Borrower has received any notice
of any kind from any Person claiming or alleging, directly or indirectly, a
violation of any Law, noncompliance with which could have a Materially Adverse
Effect.

         Section 7.K. Corporate Structure and Affiliates. Stericycle has no
Subsidiaries and no Affiliates, other than the other Borrowers or as otherwise
identified on Schedule 7.A hereto, and directors and shareholders of the
Borrowers. Stericycle's authorized and outstanding capital stock is as set forth
in the Registration Statement. The preferences, priorities, rights and other
features of the 3CI Preferred Stock (the "Preferences") are as set forth in the
Certificate of Incorporation of 3CI, as amended to date, a copy of which has
been or will be furnished to Agent.

         Section 7.L. Corporate Names. Each Borrower has no assumed corporate
names and is not doing business under any corporate name, other than as
identified on Schedule 7.A hereto.

         Section 7.M. Solvency. Stericycle and its Subsidiaries on a
consolidated basis (i) is solvent and will not be rendered insolvent by the
incurrence of the Obligations, by the execution of this Agreement, the Notes,
and any other Loan or other Transaction Documents to which it is a party or
signatory, or by any transactions contemplated hereunder or thereunder, (ii) is
able to pay its debts as they come due and does not intend to incur, or believe
that it will incur, debts beyond its ability to pay such debts as they mature or
come due, (iii) has capital sufficient to carry on its business and any business
in which it intends or is about to engage, and (iv) owns property and assets
having a value in excess of its liabilities and debts.

         Section 7.N. Margin Regulations. No Borrower is engaged in the business
of extending credit for the purpose of purchasing or carrying margin stock
(within the meaning of Regulation G, T, U or X of the Board of Governors of the
Federal Reserve System). No part of the proceeds of any of the Loans made
hereunder will be used to purchase or carry any Margin Stock, to reduce or
retire any indebtedness originally incurred to purchase or carry any Margin
Stock, to extend credit to others for the purpose of purchasing or carrying any
such Margin Stock, or for any other purpose which might cause any of the Loans
to be considered purpose credit within the meaning of Regulation G, T, U or X of
the Board of Governors of the Federal Reserve Board.

         Section 7.O. Indebtedness to Affiliates. Other than intercompany loans
between and among the Borrowers, and except as set forth on Schedule 7.0 hereto,
there are no outstanding loans from any Affiliate to any Borrower, or from any
Borrower to any Affiliate.

         Section 7.P. Acts of God. Neither the business nor properties of any
Borrower are 

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   46

presently affected by any fire, explosion, accident, drought, storm, hail,
earthquake, embargo, act of God or of the public enemy or of political unrest,
or potential expropriation, or other casualty (whether or not covered by
insurance) which could have a Materially Adverse Effect.

         Section 7.Q. Labor Controversies; Union Contracts, Etc. There are no
labor controversies pending or, to the knowledge of any Borrower, threatened
against any Borrower, which if adversely determined could have a Materially
Adverse Effect. There are no pending or, to any Borrower's knowledge, threatened
or anticipated (i) employment discrimination charges or complaints against or
involving any Borrower before any governmental Person, (ii) unfair labor
practice charges or complaints, disputes or grievances or arbitration
proceedings or controversies affecting any Borrower, (iii) union representation
petitions respecting the employees of any Borrower, or (v) strikes, slowdowns,
work stoppages, or lockouts or threats thereof affecting any Borrower except as
set forth in Schedule 7.Q. There are no collective bargaining agreements
covering any of the employees of any Borrower. No Borrower has breached or
otherwise failed to comply with any provision of any collective bargaining
agreement or other labor union contract applicable to any of its employees.

         Section 7.R. Collateral, etc. No Borrower owns any real property, or
leases any real property as lessee, or otherwise uses any real property in
connection with its operations, except as set forth in Schedule 7.R hereto,
which contains a complete and accurate description, by owner/lessor and location
(by street address) of all such owned, leased and/or used properties. With
respect to each Leasehold:

                 (i) The Borrower identified in the Lease has a valid and
indefeasible leasehold interest in the Leasehold, or other rights to use the
Leasehold, free and clear of all Liens except Permitted Liens; and

                 (ii) Each Lease is a valid and subsisting lease in full force
and effect in accordance with the terms thereof, the Borrower identified in the
Lease is in possession of the Leasehold, and no material default by any Borrower
exists under any Lease.

         One or more of the Borrowers are the record and/or beneficial owners of
all presently existing Collateral, in each case free and clear of all Liens
except Permitted Liens. The provisions of the Loan Documents are effective to
create, in favor of the Agent, for its benefit and the ratable benefit of the
Lenders, legal, valid and enforceable Liens in all right, title and interest of
the Borrowers in any and all of the Collateral described therein, securing the
Obligations from time to time outstanding, and upon all filings and recordings
being duly made in the locations referred to in the applicable Loan Documents or
the taking of possession of the Collateral by the Agent in accordance with the
provisions of such Loan Documents, each of such Loan Documents shall constitute,
as of and after the Closing Date, a fully perfected first priority Lien in all
right, title and interest of the respective Borrowers in such Collateral
superior in right to any Liens, existing or future, which the Borrowers or any
creditors thereof or purchasers (other than purchasers of inventory in the
ordinary course of business and purchasers of assets

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   47

the sale of which is permitted hereunder or under the applicable Loan Document)
therefrom, or any other Person, may have against such Collateral or interests
therein, except to the extent, if any, otherwise resulting from a Permitted
Lien.

         Section 7.S. Intellectual Property. Each Borrower has the legal right
to all Intellectual Property Rights that are necessary for the conduct of its
business. All Intellectual Property Rights (other than trade secrets,
confidential research development and commercial information and know-how) of
the Borrowers are set forth on Schedule 7.S hereto. Except as set forth in
Schedule 7.S, with respect to all Intellectual Property Rights: (i) one or more
of the Borrowers is the sole and exclusive owner of the entire and unencumbered
right, title and interest in and to thereof; (ii) the Borrowers have no
knowledge of the existence of any Intellectual Property Rights held by any other
Person that would preclude any Borrower from using its Intellectual Property
Rights in the conduct of its business; (iii) no claim has been made, and the
Borrowers have no knowledge of any claim that is likely to be made, that the use
by any Borrower of any of its Intellectual Property Rights does or may violate
the rights of any Person; and (iv) each Intellectual Property Right of all
Borrowers has not been adjudged invalid or unenforceable and is valid and
enforceable, and there are no prior or other uses thereof which to the
Borrower's best knowledge could lead to any such Intellectual Property Right
becoming invalid or unenforceable.

         Section 7.T. Surety Obligations; Financial Assurances. Except as set
forth in Schedule 7.T, no Borrower is obligated as surety or indemnitor under
any surety or similar bond or other contract, or issued or entered into any
agreement to assure payment, performance or completion of performance of any
undertaking or obligation of any Person other than another Borrower in excess of
$5,000. No Borrower has posted or placed any Financial Assurance except as
indicated in Schedule 7.T hereto.

         Section 7.U. Business Relations. There exists no actual or threatened
termination, cancellation, or adverse limitation of, or any adverse modification
or change in, the contractual and/or business relationship between any Borrower
and any owner/lessor of any facility utilized in any Borrower's business,
municipality, customer and/or supplier, and to Borrowers' knowledge, there
exists no present condition or state of facts or circumstances in such
relations, which in each case would have a Materially Adverse Effect.

         Section 7.V. Accuracy of Information. All factual information
heretofore, or contemporaneously furnished by or on behalf of the Borrowers in
writing to the Agent or any Lender for purposes of or in connection with this
Agreement or any transaction contemplated hereby, and all other such factual
information hereafter furnished by or on behalf of the Borrowers to the Agent or
any Lender will be, true and accurate in every material respect on the date as
of which such information is dated, or certified, and to the best knowledge of
Borrowers such information is not, or shall not be, as the case may be,
incomplete by omitting to state any material fact necessary to make such
information not misleading. To the best knowledge of the Borrowers there is no
fact relating to Stericycle and its Subsidiaries or the industry in which they
operate which has a Materially Adverse Effect or in the future may (so far as
any Borrower may

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now foresee), have a Materially Adverse Effect, which has not been set forth
herein or in written materials, certificates or statements furnished to the
Agent prior to the date hereof.

         Section 7.W. Representations and Warranties True and Correct. If the
Acquisition Date is not the date of this Agreement, the representations and
warranties of the Borrower contained in this Section 7 and elsewhere in this
Agreement and the other Loan Documents, and all information contained in any
exhibit, schedule or attachment hereto or in writing delivered by any Borrower,
will be true and correct in all material respects on the Acquisition Date as
though then made and immediately after giving effect to the Acquisition. If the
Acquisition Date is the date of this Agreement, then all such representations,
warranties and information shall be and be deemed made by the Borrowers
immediately after giving effect to the Acquisition.

         Section 7.X. Representations and Warranties under Acquisition
Documents. All representations and warranties made by any Borrower in any of the
Acquisition Documents (collectively, the "Other Documents") are true and correct
as of the date hereof with the same force and effect as though made on and as of
the date hereof, except to the extent that any such representations and
warranties relate expressly to an earlier date or may have been affected by the
consummation of the transactions contemplated and permitted or required by this
Agreement and the Other Documents or transactions in the ordinary course of
business.

         Section 7.Y. Year 2000. The Borrowers have reviewed the areas within
their businesses and operations which could be adversely affected by, and have
developed or are developing a program to address on a timely basis, the "Year
2000 Problem" (that is, the risk that computer applications used by the
Borrowers may be unable to recognize and perform properly date-sensitive
functions involving certain dates prior to and any date on or after December 31,
1999), and have made related appropriate inquiry of material suppliers, vendors
and customers. Based on such review and program, the Borrowers believe that the
"Year 2000 Problem" will not have a Materially Adverse Effect. From time to
time, at the request of the Agent, the Borrowers shall provide to the Agent such
updated information or documentation as is requested regarding the status of
their efforts to address the Year 2000 Problems.

SECTION 8.  COVENANTS.

         The Borrowers hereby covenant and agree with the Agent and the Lenders
that, until the Obligations have been satisfied and discharged in full, the
Borrowers will comply and/or cause compliance with the following covenants,
unless the Required Lenders shall give their prior written consent to the
contrary:

         Section 8.A.  Affirmative Covenants.

         8.A.1. Financial Covenants. The Borrowers shall maintain compliance
with the following financial covenants at all times during the periods indicated
below, all as determined on an Adjusted Historical Pro Forma Basis from the
Borrowers' quarterly and annual Consolidated 

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Financial Statements, as appropriate:

         (a) Net Worth. The Consolidated Net Worth of Stericycle and its
Subsidiaries shall not at any time be less than $47,673,000, plus 100% of the
positive Consolidated Net Income for the preceding four quarters (without
reduction by any net losses other than extraordinary losses), plus 100% of the
Net Cash Proceeds with respect to the issuance of any equity securities or any
Subordinated Debt.

         (b) Debt Service Coverage. The Consolidated Debt Service Coverage of
Stericycle and its Subsidiaries shall not be less than the following ratios
during the following periods:

         Ratio                              Period
         -----                              ------

         1.10:1.00                          Through September 30, 1999

         1.25:1.00                          From October 1, 1999 and thereafter

         (c) Cash Flow Leverage Ratio. The Cash Flow Leverage Ratio of
Stericycle and its Subsidiaries shall not be greater than the following as at
the end of the Measurement Periods ending during the following periods:

         Cash Flow Leverage Ratio           Period

         3.50:1.00                          through September 30, 1999
         3.00:1.00                          from October 1, 1999 through
                                            September 30, 2000 2.50:1.00 each
                                            Measurement Period ending after
                                            September 30, 2000

         (d) Funded Debt to Total Capitalization. The Borrowers shall not permit
the ratio of consolidated Funded Debt to consolidated Total Capitalization to be
greater than 50% at any time.

         8.A.2. Financial Information and Reporting. Each Borrower shall keep
and cause to be kept proper books and records in which full and true entries
will be made, in accordance with GAAP, of all dealings or transactions relating
to its business and affairs, and the Borrowers shall cause to be furnished to
the Agent and each Lender:

                (i) As soon as practicable, and in any event, within thirty (30)
         days after the end of each month, all of the Borrowers' internally
         prepared consolidated and consolidating balance sheets as at such date
         and statements of income and retained earnings and of cash flow
         (consolidated only) for the period from the beginning of the current
         Fiscal Year to the end of such month, all in reasonable detail and
         certified by 

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         Stericycle's president or chief financial officer as fairly presenting
         the financial condition and operations of the Borrowers as of and for
         the period then ending and being accurate in all material respects and
         having been prepared in accordance with GAAP;

                (ii) As soon as practicable and, in any event, within forty-five
         (45) days after the end of each quarter of each Fiscal Year, all of the
         Borrowers' consolidated and consolidating statements of income and
         retained earnings and of cash flows (consolidated only) through the
         quarter then ended and a consolidated and consolidating balance sheet
         of the Borrowers as of the end of such quarter, all in reasonable
         detail and certified by Stericycle's president or chief financial
         officer as fairly presenting the financial condition and operations of
         the Borrowers as of and for the period then ending and being accurate
         in all material respects and having been prepared in accordance with
         GAAP;

                (iii) As soon as practicable and, in any event, within ninety
         (90) days after the end of each Fiscal Year, all of the Borrowers'
         audited consolidated and unaudited consolidating statements of income
         and retained earnings and of cash flows (consolidated only) through the
         Fiscal Year then ended and a consolidated and consolidating balance
         sheet of the Borrowers as of the end of such Fiscal Year, in each case
         with comparable information at the close of and for the prior Fiscal
         Year, all in reasonable detail, containing no qualifications
         unacceptable to the Required Lenders and audited by an independent
         certified public accountant selected by the Borrowers and acceptable to
         the Agent and prepared in accordance with GAAP;

                (iv) Together with the Financial Statements for each quarter of
         each Fiscal Year, (a) a certificate in the form attached hereto as
         Exhibit H (or such other form reasonably requested by Agent) executed
         by the chief financial officer of Stericycle certifying to the Agent
         and the Lenders that the Borrowers are in compliance with each of the
         financial covenants set forth in Section 8.A.1 hereof and setting forth
         in detail satisfactory to the Agent the calculations and computations
         showing such compliance, and (b) a certificate executed by the
         president or chief financial officer of Stericycle stating whether any
         Default or Event of Default currently exists and is continuing and what
         action, if any, the Borrowers are taking or propose to take with
         respect thereto;

                (v) A Borrowing Base Certificate on and as of the date hereof,
         on and as of the date of any borrowing of a Loan, and within twenty
         (20) days after the end of each month certified as of the last day of
         such month;

                (vi) When and as so furnished, such other financial information
         concerning the Borrowers, their business, financial condition or assets
         as may be furnished to the holders of any of the Borrowers' common or
         preferred stock (including all financial statements, reports and proxy
         statements), or as the Agent may reasonably request from time to time;
         and, promptly upon the filing thereof, all registration statements and
         annual, quarterly, monthly or other regular reports which any Borrower
         files with the SEC;

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                (vii) Such notices and information as and when required under
         the Environmental Indemnity Agreement;

                (viii) Promptly upon discovery thereof, notice of any action,
         suit, arbitration, investigation, administrative or other proceeding
         instituted, commenced or threatened against or affecting any Borrower
         which may reasonably be expected to cause the Borrowers to incur or be
         liable for claims, damages and/or costs of any kind (including, without
         limitation, attorneys' fees, expert witness fees and court, judgment,
         settlement and compliance or remedial costs), aggregating in excess of
         $250,000;

                (ix) Promptly upon any Borrower's becoming aware thereof, notice
         of any proposed Laws, or amendments thereto, which would regulate,
         restrict or prohibit any Borrower in such a way as might have a
         Materially Adverse Effect;

                (x) Notice of the occurrence or existence of any Default or
         Event of Default immediately upon any Borrower's becoming aware
         thereof; and promptly upon discovery thereof, notice of any
         development, financial or otherwise, which might have a Materially
         Adverse Effect;

                (xi) Upon request of the Agent from time to time, any
         information concerning the Borrowers' compliance with any and all Laws;

                (xii) Promptly upon any Borrower becoming aware thereof, notice
         of any claim of violation of any Law, and notice of any violation or
         breach by any Borrower of the terms of, or any revocation or suspension
         or threatened revocation or suspension of, any license or permit of a
         Borrower, the effect of which would have a Materially Adverse Effect;

                (xiii) Notice of the cancellation or expiration of any bond,
         letter of credit or similar instrument issued as Financial Assurance
         and the terms of any replacement or renewal bond, letter of credit or
         similar instrument if not issued by the Agent the effect of which is
         material;

                (xiv) Within 45 days of the end of each quarter of each Fiscal
         Year, a certificate of the president or chief financial officer of
         Stericycle and stating that the Borrowers are in compliance in all
         material respects with all Environmental Laws (as defined in the
         Environmental Indemnity Agreement), and all Laws relating to the
         generation, segregation, handling, packaging, collection,
         transportation, treatment, storage and/or disposal of regulated medical
         waste.

                (xv) Within 30 days after the end of each six-month period,
         regardless of whether any New Subsidiary has been acquired during such
         period, a New Subsidiary Certificate substantially in the form of
         Exhibit I hereto;

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   52

                (xvi) Within 60 days of the end of each Fiscal Year, updated
         annual budgets, financial projections (rolling five years) and business
         plans for the ensuing Fiscal Year;

                (xvii) Within 20 days after the end of each month, a summary
         receivables aging report acceptable to Agent as at the end of such
         month; and

                (xviii) Such other material information that the Agent
         reasonably deems necessary from time to time in the ordinary course of
         business.

         8.A.3. Corporate Existence and Conduct of Business. Each Borrower will
maintain and preserve its corporate existence, good standing, certificates of
authority, licenses, permits, franchises, patents, trademarks, trade names,
service marks, copyrights, leases and all other contracts and rights necessary
or desirable to continue its operations and business on a profitable basis and
will generally continue the same line of business as that being presently
conducted.

         8.A.4. Taxes and Laws. The Borrowers will pay when due, all taxes,
assessments, charges and levies imposed on a Borrower or any of its property or
assets or which it is required to withhold and pay out and will comply in all
material respects with all applicable present and future Laws applicable to any
Borrower or any of its property or assets, unless a Borrower is contesting in
good faith, by an appropriate proceeding, the validity, amount, imposition or
applicability of the above while maintaining reserves therefor which are
appropriate and adequate as determined in accordance with GAAP, and such contest
does not have or cause a Materially Adverse Effect.

         8.A.5. Inspection. Upon the Agent's request, the Borrowers will allow
the Agent or any Lender, and any of its officers, employees or agents, to visit,
during normal business hours, for inspection and review, any of the Borrowers'
premises and will make available and furnish to the Agent or any Lender the
Borrowers' books and records and such financial information concerning the
Borrowers' property or assets, business, affairs, operations or financial
condition as reasonably requested by Agent or any Lender.

         8.A.6. Agent and Lender Costs. The Borrowers shall pay upon demand, all
reasonable out-of-pocket fees, costs and expenses (including those of outside
counsel, auditors, appraisers, accountants, insurance and environmental
advisors, title companies, surveyors, and other consultants and agents) incurred
or paid by the Agent in connection with the preparation, negotiation,
documentation, administration (including periodic field and collateral audits
and site visits), amendment, modification, waiver, interpretation, collection or
enforcement of this Agreement, the Notes, or any other Loan Documents and the
credit and security therefor. In addition, the Borrowers shall pay upon demand
all such costs and expenses of the Agent and the Lenders in connection with any
Default or Event of Default by the Borrowers hereunder, or in connection with
the collection or enforcement of any of the terms hereof or of the other Loan
Documents and the credit and security therefor, or any "work-out," refinancing
or restructuring of the credit arrangement set forth herein. Any attorneys' fees
due hereunder are to be calculated 

                                       83
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at the attorneys' customary hourly rates, and not as a percentage of the
indebtedness or of the amount recovered. The Borrowers agree to indemnify the
Agent and each Lender, their respective successors and assigns, and their
respective officers, directors and employees, from and hold each of them
harmless against (i) any transfer taxes, documentary taxes and any other taxes,
penalties, assessments or charges made by any governmental authority by reason
of the execution, delivery and performance of the Loan Documents and any
security therefor, and (ii) any and all losses, claims, damages, liabilities and
expenses, including all expenses of litigation or preparation therefor, which
any of them may incur or which may be asserted against any of them in connection
with or arising out of the direct or indirect application of the proceeds of
Loans or drawings under Letters of Credit. The obligations under this Section
8.A.6 shall survive repayment of the Loans and expirations of the Letters of
Credit and the assignment of any rights hereunder.

         8.A.7. Employee Plans. The Borrowers shall (i) keep in full force and
effect any and all Employee Plans which are presently in existence or may, from
time to time, come into existence under ERISA, and not withdraw from any such
Employee Plans, unless such withdrawal can be effected or such Employee Plans
can be terminated without material liability to any Borrower; (ii) make
contributions to all of such Employee Plans in a timely manner and in a
sufficient amount to comply with the requirements of ERISA, including the
minimum funding standards of Section 302 of ERISA; (iii) comply with all
material requirements of ERISA which relate to such Employee Plans; (iv) notify
the Agent immediately upon receipt of any notice concerning the imposition of
any withdrawal liability or of the institution of any proceeding or other action
which may result in the termination of any such Employee Plans or the
appointment of a trustee to administer such Employee Plans; and (v) promptly
advise the Agent of the occurrence of any Reportable Event or Prohibited
Transaction, as defined in ERISA, with respect to any such Employee Plans.

         8.A.8. Use of Proceeds of Loans. The Borrowers shall use the proceeds
of the Loans as follows: A Revolving Loans - for working capital purposes and
capital expenditures and for Letters of Credit; B Revolving Loans - to finance
acquisitions permitted hereunder; Term Loan - to refinance amounts of
outstanding B Revolving Loans.

         8.A.9. Financial Assurance. The Borrowers shall timely comply or cause
compliance with the requirements of any Act or any other Law concerning
Financial Assurance. If any funds are drawn on any Financial Assurance at any
time, the Borrowers shall promptly notify the Agent in writing of the amount of
and the reason for the draw. The Borrowers shall not maintain more in Financial
Assurance than is required pursuant to any Act or any Law at any time. At the
earliest available opportunity under any Act or other Law, the Borrowers shall
request that the amount of Financial Assurance be reduced if and as permitted
under the Act, or such other Law.

         8.A.10. Operating Account(s). The Borrowers shall maintain their
principal operating accounts with the Agent. If the average amount of demand
deposit balances on deposit in the Borrowers' operating accounts over any
calendar quarter is not sufficient to cover the costs of 

                                       84
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non-credit services provided by the Agent in servicing such accounts (as
determined and priced in accordance with the Agent's standard rate schedule of
non-credit bank services as then in effect), the Borrowers shall pay to the
Agent, on demand, or Agent shall debit Borrowers' account, a deficient balances
fee on the amount of the deficiency based on the Agent's earnings credit rate
then in effect in accordance with the Agent's standard practice.

         8.A.11. [Intentionally Omitted].

         8.A.12. Environmental Matters. The covenants and agreements of the
Borrowers set forth in the Environmental Indemnity Agreement are hereby
incorporated herein in full by this reference.

         8.A.13. Collateral Agreements; New Subsidiaries and Future
Acquisitions. The Borrowers shall, with reasonable promptness and diligence (i)
pledge or cause to be pledged to the Agent, through execution of the Addendum
attached to the Stock Pledge Agreement and delivery of the stock certificates
and other matters referred to therein, 100% of the stock (or other ownership
interest) of any Person (a "New Subsidiary") hereafter acquired/formed by any
Borrower; and (ii) cause each said party listed in (i) above (other than 3CI
until such time as it is a wholly owned Subsidiary directly or indirectly of
Stericycle) to execute an agreement of joinder and assumption (a "Joinder
Agreement(s)") in the form of Exhibit J hereto pursuant to which it will become
a Borrower under this Agreement and the Notes and a Debtor under the Security
Agreement and a party to other relevant Loan Documents, and to execute such
other documents and take such other action as may be necessary or appropriate to
grant to the Agent, for its benefit and the ratable benefit of the Lenders a
first priority perfected security interest in the Collateral covered by such
Loan Documents (subject to any Lien permitted under clause (ix) of the
definition of Permitted Lien). In addition, within 15 days any such New
Subsidiary shall deliver to the Agent: an executed Officer's Certificate
substantially in the form attached as Exhibit K hereto; organizational documents
as specified in Section 6.A.9 and 6.A.10; an executed secretary's certificate as
described in Section 6.A.11; executed financing statements for each state in
which Collateral owned by a New Subsidiary is located; and such other documents,
instruments or agreements as the Agent may reasonably request. In addition, any
Borrower which hereafter acquires or leases any real property shall, prior to or
contemporaneously therewith, furnish to the Agent all documentation of the type
described in Sections 6.A and 6.F in reference to the Leaseholds or the owned
properties involved.

         8.A.14. Interest Rate Contracts. The Borrowers shall execute all
documents and take such other action as may be necessary and appropriate to
include all of its obligations to the Agent or Lenders under any Interest Rate
Contract as obligations which are secured by the Collateral. Nothing herein
shall obligate the Agent, the Lenders or Borrowers to enter into any Interest
Rate Contract.

         8.A.15. [Intentionally Deleted.]

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        8.A.16. Maintenance of Insurance. The Borrowers shall maintain
insurance with financially sound and respectable insurance companies or
associations in such companies or associations in such amounts and covering such
casualties and risks as are customary in accordance with prudent business
practice in the case of companies engaged in the same or a similar business and
similarly situated, which insurance may provide for reasonable deductibility
from coverage thereof. The Borrowers will, upon request, furnish to the Agent at
reasonable intervals a certificate of an Authorized Officer setting forth the
nature and extent of all insurance maintained by the Borrowers. The Borrowers
shall retain all incidents of ownership of the insurance maintained pursuant
hereto and shall not borrow upon or otherwise impair their rights to receive the
proceeds of such insurance. Unless Borrowers provide Agent with evidence of the
insurance coverage required in this Agreement, Agent may purchase insurance at
Borrowers' expense to protect its interests in the Collateral. This insurance
may, but need not, protect Borrowers' interests. The coverage Agent purchases
may not pay any claim that Borrowers make or any claim that is made against
Borrowers in connection with the Collateral. Borrowers may later cancel any
insurance purchased by Agent, but only after providing Agent with evidence that
Borrowers have obtained insurance as required by this Agreement. If Agent
purchases insurance for the Collateral, Borrowers shall be responsible for the
costs of that insurance, including interest and any other charges Agent may
impose in connection with the placement of the insurance, until the effective
date of the cancellation or expiration of the insurance. The cost of the
insurance may be added to the Obligations. The cost of the insurance may be more
than the cost of insurance Borrowers may be able to obtain on their own.

         8.A.17. Voluntary Dissolution - S.D. Acquisition Corp. If SWD
Acquisition Corp. is not dissolved within sixty (60) days of the date hereof,
Stericycle shall cause it to execute a Joinder Agreement.

         8.A.18. Stericycle of Arkansas, Inc. Stericycle of Arkansas, Inc.
("Stericycle-Ark.") has entered into a contract to sell its real estate and
other assets. If such sale is not closed on or before December 1, 1998, then
Stericycle-Ark. shall execute a Mortgage in favor of the Agent. Stericycle will
cause Stericycle-Ark. to be dissolved within sixty (60) days of the date any
sale of the real estate and related assets is closed.

         8.A.19. 3CI Pledge. Stericycle shall, with reasonable promptness, if
and after 3CI becomes a wholly owned Subsidiary of Stericycle, cause 3CI to
grant to Agent a first priority lien on all its assets except to the extent set
forth in Schedule 8.A.19.

         Section 8.B.  Negative Covenants.

         8.B.1. Liens. The Borrowers shall not create, grant, pledge, permit or
suffer to exist, any Lien upon any of the Collateral or any other property or
assets of any of the Borrowers, except Permitted Liens.

         8.B.2. Debt.

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         The Borrowers shall not, directly or indirectly, create, assume, incur,
suffer to exist, guarantee, become or be liable for or with respect to any
manner of obligations, liabilities, indebtedness or other Debt whatsoever to any
Person, except with respect to: (i) the Obligations hereunder; (ii) existing
Debt indicated on Schedule 8.B.2 hereto (to the extent such existing Debt is
repaid, additional Debt may not be incurred); (iii) current liabilities and
accounts payable arising or accruing in the ordinary course of business (other
than a guaranty or indebtedness for borrowed money, an extension of credit or
deferred purchase price of property not otherwise permitted hereunder); (iv)
contingent Debt for any draws at any time made on outstanding instruments as
Financial Assurance; (v) contingent Debt with respect to any Interest Rate
Contracts with the Lenders; (vi) Debt assumed or incurred in or in connection
with any merger or acquisition permitted under Section 8.B.3; (vii) purchase
money Debt incurred in connection with liens described in clause (vii) of the
definition of Permitted Liens, provided, however, that such purchase money Debt
shall not exceed (x) $500,000 in the aggregate during any one Fiscal Year (it
being understood that the amount of any such Debt permitted to be incurred
during any one Fiscal Year, but not so incurred, shall not carry over to
subsequent Fiscal Years), or (y) $2,500,000 cumulatively in the aggregate; and
(ix) unsecured short-term Debt incurred in the ordinary course of business
aggregating not more than $250,000 at any one time outstanding.

         8.B.3. Fiscal Year, Name Changes, Mergers and Acquisitions. No Borrower
shall (i) change its Fiscal Year or its corporate name or without prior written
notice to the Agent and only after all necessary or desirable Financing
Statements have been duly and properly filed and recorded maintaining Agent's
first priority perfected liens and security interests on and in the Collateral,
adopt an assumed corporate name, (ii) consolidate or merge with any Person,
(iii) acquire any stock in, or acquire all or substantially all of the assets or
properties of, or make any investment in, any Person, except that the existing
investments listed on Schedule 8.B.3 are permitted hereunder as are those
permitted in Section 8.B.5 hereof, or (iv) create any Subsidiaries; provided,
however, that notwithstanding the foregoing, and subject to the conditions set
forth below, the following are permitted: (a) any Borrower may merge with any
other Borrower, so long as Stericycle is the surviving corporation in any merger
involving it and any other Borrower, and provided also that in any merger
involving any Borrower the stock of which has been pledged to the Agent, the
Agent shall have or obtain a first priority security interest in the stock of
the surviving Borrower in such merger, or any Borrower (other than Stericycle)
may dissolve as long as all of its assets are distributed pursuant to the
dissolution to another Borrower; (b) a Borrower may merge with any Person other
than another Borrower, so long as the Borrower is the surviving corporation in
any such merger and no Default or Event of Default would result therefrom
immediately after giving effect thereto; (c) any Borrower may acquire stock in a
New Subsidiary, or acquire all or substantially all of the assets or properties
of, any Person, or create a New Subsidiary, or make an investment in an
Affiliate which is not a Subsidiary, provided that no Default or Event of
Default would result therefrom immediately after giving effect thereto and that
the provisions of Section 8.A.13, if applicable, are complied with; provided,
further, that (x) any individual transaction described in (b) and (c) above that
involves an acquisition and total consideration (meaning total purchase price,
including cash expended and/or the value of stock issued to the seller, Debt
incurred, and liabilities incurred or 

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assumed) in excess of $10,000,000 per single acquisition or any acquisition of
which more than $5,000,000 of the consideration consists of cash expended and
liabilities assumed, must also be approved in advance in writing by the Agent;
and (y) in connection with any individual transaction described in (b) and (c)
above that involves an acquisition which requires approval of the Agent under
(x) above, the Borrowers must deliver to the Agent, no less than fourteen (14)
days prior to the consummation of such acquisition, a certificate executed by
the chief financial officer of Stericycle certifying to the Agent that no
Default or Event of Default will result from such acquisition after giving
effect thereto, and also certifying and demonstrating to the reasonable
satisfaction of the Agent that the Borrowers are in compliance with each of the
financial covenants set forth in Section 8.A.1 hereof calculated on an Adjusted
Historical Pro Forma Basis. "Adjusted Historical Pro Forma Basis" means, for any
Measurement Period ending as at the end of the quarter preceding the month in
which Borrowers propose to make any such acquisition permitted hereunder, the
relevant financial terms (i.e. those included in calculating Net Worth, Debt
Service Coverage, Cash Flow Leverage Ratio, Funded Debt and Total
Capitalization) as calculated and determined for the Borrowers and, or
including, any Subsidiaries or business acquired during the Measurement Period
and/or to be acquired and with respect to which the calculation of the various
financial covenants on an Adjusted Historical Pro Forma Basis is being made, all
determined in accordance with GAAP (except that non-recurring items involving
such acquired and to be acquired Subsidiaries or business otherwise included in
the relevant calculations shall be disregarded with approval of the Agent in its
sole discretion) and calculated as if all such acquired and to be acquired
Subsidiaries or business had been owned by the Borrowers through the Measurement
Period involved. In addition, the Agent shall receive within 30 days of closing,
a written description of any acquisition and any other information which Bank
reasonably requests. The Agent shall also receive before Borrowers consummate
any acquisition requiring approval of the Agent referred to in (x) above: due
diligence materials, financial statements for the past three years, if
available, data, information and reports (all of which must be satisfactory to
the Agent; all acquisition documents/agreements (which must be satisfactory to
the Agent); and all documentation requested by the Agent to perfect its Liens on
and against acquired assets. In addition, Borrowers will make no acquisitions or
any business outside of the line of business in which the Borrowers are
currently engaged.

         8.B.4. Redemptions, Dividends and Payments Under Subordinated Debt. No
Borrower shall declare or make any Restricted Payments.

         8.B.5. Transactions with Affiliates. No Borrower shall enter into any
transaction with its Affiliates or any of its or its Affiliates' shareholders,
directors, officers or employees, except in the ordinary course of business and
upon fair and reasonable terms which are no less favorable to said Borrower than
those that would be available at the time of such transaction in a comparable
arm's length transaction with a Person not an Affiliate. No Borrower shall pay
any management fee to any Affiliate other than Stericycle, nor advance, loan or
invest more than $250,000 in any other Affiliate (other than 3CI).
Notwithstanding the foregoing, (a) Borrowers may advance up to an additional
$3,000,000 to WSI and (b) WSI may purchase, or loan to 3CI to enable it to
purchase, approximately 1,000,000 shares of 3CI Common Stock, at a price of
$2.50

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per share, upon exercise of certain put rights jointly granted by 3CI and WSI
under a certain Settlement Agreement and Release of All Claims effective January
10, 1996 as described on Schedule 8.B.2, provided that any such purchases of
stock shall be funded by B Revolving Loans and any such advances or loans shall
be evidenced by a promissory note which shall be pledged to the Agent. Any
amounts advanced or loaned by a Borrower to 3CI by a Borrower to 3CI may be
converted into 3CI capital stock at an amount not to exceed fair market value.

         8.B.6. Capital Structure. No Borrower shall have outstanding or issue
any shares of preferred stock. No Borrower shall make any changes in its capital
structure (including the terms of its outstanding stock), amend its certificate
of incorporation or bylaws, or make any changes in any of its business
objectives, purposes or operations if such change has a reasonable likelihood of
having a Materially Adverse Effect. No Borrower (other than Stericycle) shall be
permitted to issue any stock other than to another Borrower.

         8.B.7. Change in Nature of Business. No Borrower shall engage in any
business unrelated to, or make any material change in the nature of, its
business as carried on at the date hereof.

         8.B.8. Transfer of Assets. No Borrower shall sell, assign, transfer,
lease or otherwise dispose any of its property or assets, except as may be
permitted under the Security Agreement or other Loan Documents. Provided in any
event that the following are permitted: (i) sales of inventory in the ordinary
course of business; (ii) sales of worn out or obsolete tools, machinery or
equipment no longer used or useful in the operation of business for fair value,
so long as the proceeds of any such sale does not exceed $250,000; (iii) sales
of other assets for cash and for fair value in an aggregate amount not to exceed
$250,000 in any Fiscal Year, provided that the Net Cash Proceeds resulting
therefrom is applied in prepayment of the Loans in the order set forth in
Section 3.F(c) hereof.

         8.B.9. Prepayment or Modification of Debt. No Borrower will (i) prepay
any Subordinated Debt or any Funded Debt owing to, or any indebtedness for money
borrowed by any Borrower from a Person other than the Lenders, or any Debt
secured by any of its assets except Debt to the Lenders, if such prepayment
occurs after an Event of Default or would cause an Event of Default or if such
prepayment would result in a borrowing hereunder, or to any holder of Permitted
Liens, and except for prepayment of Debt secured by an asset if a replacement
asset of equal or greater value is purchased in connection therewith, or (ii)
enter into or modify any agreement as a result of which the terms of payment of
any of the foregoing Debt are amended or modified, except Subordinated Debt so
long as such amendment or modification does not, and will not result in any,
increase in the amount of, interest rate on, or collateral for, or any earlier
payment or maturity of, the Subordinated Debt, or conflict with or breach the
terms of this Agreement or any Loan Documents hereunder or the applicable
subordination agreement with the Agent therefor.

         8.B.10. False Statements. No Borrower will furnish the Agent or the
Lenders any

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certificate or other document that knowingly contains any untrue statement of
material fact or that omits to state a material fact necessary to make it not
misleading in light of the circumstances under which it was furnished.

         8.B.11. Inconsistent or Restrictive Agreements. No Borrower shall enter
into any agreement which would violate or cause a breach of or under this
Agreement or any Loan Documents or the performance by any Borrower of any
obligation hereunder or thereunder or which prohibits or would prohibit the
creation, incurrence or assumption of any Lien upon a Borrower's property or
assets, whether now owned or hereafter acquired.

         8.B.12. Investments. The Borrowers shall not make any loan or advance
to any Person, or purchase or otherwise acquire any capital stock, assets,
obligations, or other securities of, make any capital contribution to, or
otherwise invest in or acquire any interest in any Person, or participate as a
partner or joint venturer with any other Person, except for Permitted
Investments and those permitted in Section 8.B.5.

SECTION 9.   EVENTS OF DEFAULT.

         The following events shall constitute and be deemed Events of Default
hereunder:

         Section 9.A. Obligations. Failure by the Borrowers (i) to make any
payment of principal on any Loan or Note or reimbursement of any draw under a
Letter of Credit on the date such payment Obligation is due, or (ii) to make any
payment of interest on any Loan or Note or any payment of any fee due hereunder
within 3 Business Days after such payment Obligation is due.

         Section 9.B. Breach or Default Under Loan Documents. (i) failure or
neglect of any Borrower to perform, keep or observe any of the covenants at
Sections 6.E.6., 6.F., 8.A.1, 8.A.2, 8.A.8, 8.A.10, or 8.B hereof; or (ii)
failure or neglect of any Borrower to perform, keep or observe any of its
respective other covenants, conditions, promises or agreements contained herein
or in any other Loan Document to which it is a party or signatory and such
Borrower fails to cure the foregoing within thirty (30) days after notice from
the Agent to the Borrowers thereof; or (iii) an Event of Default occurs under
any other Loan Document; or (iv) at any time any notice is given by a Borrower
of the discontinuance, invalidity or unenforceability of or such Borrower's
obligations thereunder.

         Section 9.C. Representation and Warranties. Any warranty or
representation now or hereafter made by any Borrower hereunder or under any Loan
Document, is untrue or incorrect in any material respect or fails to state a
material fact necessary to make such warranty or representation not misleading
in light of the circumstances in which it was made, or any schedule,
certificate, statement, report, financial data, notice or writing furnished to
the Agent or Lenders at any time by any Borrower is untrue or incorrect in any
material respect or fails to state a material fact needed to make the foregoing
not misleading in light of the circumstances in which the 

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foregoing were furnished, in each case on the date as of which the facts set
forth therein are stated or certified and such Borrower fails to cure any of the
foregoing within thirty (30) days after such Borrower should have become aware
of the same.

         Section 9.D. Judgments. A final and non-appealable judgment or order,
or an aggregate of final and non-appealable outstanding judgments or orders,
requiring payment in excess of $250,000, either not fully covered by insurance
or the insurance for which is disputed or contested, shall have been entered
against a Borrower, and such judgments or order(s) shall remain unsatisfied or
undischarged and in effect for thirty (30) consecutive days without a stay of
enforcement or execution thereof.

         Section 9.E. Insolvency and Related Proceedings. If any Borrower (i) if
a natural Person, dies or, if not a natural Person, is dissolved; (ii)
authorizes or makes an assignment for the benefit of creditors; (iii) generally
shall not pay its debts as they become due; (iv) shall admit in writing its
inability to pay its debts generally; or (v) shall authorize or commence
(whether by the entry of an order for relief or the appointment of a receiver,
trustee, examiner, custodian or other similar official therefor or for any
substantial part of its property) any proceeding or voluntary case under any
bankruptcy, reorganization, insolvency, dissolution, liquidation, adjustment or
arrangement of debt, receivership or similar Laws or if such proceedings are
commenced or instituted, or an order for relief or approving any petition
commencing such proceedings is entered against a Borrower and such party, by any
action or failure to act, authorize, approve, acquiesce, or consent to the
commencement or institution of such proceedings, or such proceedings are not
dismissed within sixty (60) days after the date of filing, commencement or
institution.

         Section 9.F. Other Material Agreements. If a Borrower defaults or a
default or an event of default occurs under or in the performance of its
obligations under (i) any other agreement with the Agent or the Lenders, or (ii)
under any other material (exceeding $250,000) agreement, document or instruments
for borrowed money, and such default, breach, or event of default continues
beyond any applicable grace period thereunder and the effect of which shall be
to allow the holder of such agreement, document or instrument to terminate the
foregoing, or the Person to whom such obligation is owed to cause such
obligation to become due prior to its stated maturity or otherwise accelerated,
or (iii) under any other material agreement, document or instrument (not for
borrowed money), and such default, breach, or event of default continues beyond
any applicable grace period thereunder and the effect of which shall be to allow
the holder of such agreement, document or instrument to terminate the foregoing
or to accelerate obligations exceeding $250,000 owed to it thereunder.

         Section 9.G. State Action. If any proceeding is instituted or commenced
by the State or country of incorporation of any Borrower, seeking a forfeiture
of the Articles of Incorporation of a Borrower and any order entered in such
proceeding shall fail to be vacated within thirty (30) days.

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         Section 9.H. ERISA Matters. If any of the following events shall have
occurred with respect to any Employee Plan and the resultant or potential
liability of the Borrowers therefor exceeds $250,000: (i) a Reportable Event or
Prohibited Transaction, as such terms are defined in ERISA, shall have occurred;
(ii) a trustee is appointed by any governmental body or agency or any court to
administer any Employee Plan; (iii) any Employee Plan is involuntarily
terminated, or circumstances exist which constitute grounds entitling the
Pension Benefit Guaranty Corporation to institute proceedings to terminate any
Employee Plan; or (iv) any withdrawal liability is incurred in connection with
any termination of an Employee Plan.

         Section 9.I. Tax Liens. If a notice of lien, levy or assessment is
filed or recorded with respect to all or a material part of the assets or the
Collateral owned by any Borrower by the United States, or any department, agency
or instrumentality thereof, or by any state, county, municipality or other
governmental agency, or any taxes or debts owing at any time or times hereafter
to any one or more of the foregoing become a lien upon a material part of the
Collateral, unless such notice or lien is a Permitted Lien or is removed within
thirty (30) days after filing or recording of such notice or becoming such lien.

         Section 9.J. Failure of Lien. If any Loan Document shall at any time
after its execution and delivery and for any reason (other than as a result of
any action or inaction by the Agent or the Lenders) cease (i) to create a valid
and perfected first priority Lien (except for Permitted Liens) in and to the
Collateral covered thereby; or (ii) to be in full force and effect or shall be
declared null and void, or the validity or enforceability thereof shall be
contested or any Borrower shall deny it has any further liability or obligation
under any Loan Document, or any Borrower shall fail to perform any of its
obligations under any Loan Document beyond any applicable grace period.

         Section 9.K.      [Intentionally Omitted].

         Section 9.L. Environmental or Other Remediation Costs. If the Agent
receives a notification pursuant to the Environmental Indemnity Agreement of, or
any Borrower or Affiliate becomes aware of, any environmental contamination or
similar site deficiency which may reasonably be expected to cause any Borrower
or Affiliate to incur or be liable for costs of any kind aggregating in excess
of a cost of $250,000.

         Section 9.M. Operating Permits and Licenses. If any Borrower fails to
maintain any permits or licenses which are necessary and required for the
ownership, use, occupancy or operation of any facility, if such deficiency would
have a Materially Adverse Effect and is not cured within 30 days.

         Section 9.N. Material Adverse Change. If since June 30, 1998, there
shall have occurred any condition or event which the Agent determines has or
might be reasonably expected to have a Materially Adverse Effect.

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         Section 9.0. Change in Control. If a Change in Control shall occur.
"Change in Control" means (i) the direct or indirect sale, lease, exchange or
other transfer of all or substantially all of the assets of Stericycle to any
Person or Group, as defined in Rule 13d-5 under the Exchange Act ("Group"),
other than an Affiliate of Stericycle, (ii) the merger or consolidation of
Stericycle with or into another entity with the effect that the then existing
shareholders of Stericycle, collectively, hold less than 50.1% of the combined
voting power of the then outstanding securities of the surviving entity of such
merger or the corporation resulting from such consolidation ordinarily (and
apart from rights arising under special circumstances) having the right to vote
in the election of directors, (iii) during any two-year period, the replacement
of a majority of the Board of Directors of Stericycle from the directors who
constituted the Board of Directors at the beginning of such period, and such
replacement shall not have been approved by a vote of at least a majority of the
Board of Directors of Stericycle then still in office who were either members of
the Board of Directors at the beginning of such period or whose election as a
member of the Board of Directors was previously so approved, (iv) a Person or
Group (other than existing shareholders of Stericycle, and/or any executive
officer of Stericycle or its Subsidiaries, or its successors) shall, as a result
of a tender or exchange offer, open market purchases, privately negotiated
purchases or otherwise, have become the beneficial owner (within the meaning of
Rule 13d-3 under the Exchange Act) of securities of Stericycle representing 50%
or more of the combined voting power of the then outstanding securities of
Stericycle ordinarily (and apart from rights arising under special
circumstances) having the right to vote in the election of directors or shall
have acquired the right to designate a majority of the Board of Directors of
Stericycle, (v) any Person or Group shall acquire the right, by contract or
otherwise, to elect, appoint or otherwise designate a majority of the Board of
Directors of Stericycle, whether or not such right is exercised, or (vi) the
occurrence of any event specified in Section 9.E. with respect to Stericycle or
any of its Subsidiaries.

SECTION 10.  RIGHTS AND REMEDIES.

         Section 10.A. Termination of Commitment and Acceleration. Upon the
happening or occurrence of an Event of Default described in Section 9.E. above,
the Lenders' Commitments shall immediately terminate, and upon the happening or
occurrence of any other Event of Default set forth in Section 9, such Event of
Default not having been previously cured or waived in writing by the Required
Lenders, the Agent shall, if so directed by the Required Lenders, or may with
the consent of the Required Lenders, declare the Commitments terminated, if they
have not yet been terminated. Following the termination of the Commitments, the
Agent shall, if so directed by the Required Lenders, or may with the consent of
the Required Lenders, accelerate the Obligations by declaring that the
Obligations are then due and payable and, thereupon, the Notes shall be and
become forthwith, due and payable without any presentment, demand, protest,
notice of any of the foregoing or other notice of any kind, all of which are
hereby expressly waived notwithstanding anything contained herein or in the
Notes to the contrary, and the Agent and the Lenders shall have all rights and
remedies now or hereafter provided by applicable Laws and without limiting the
generality of the foregoing may, at their option, also appropriate and apply
toward the payment of the Notes, any indebtedness of the Agent or the

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Lenders to the Borrowers, howsoever created or arising, and may also exercise
any and all rights and remedies hereunder, under the Loan Documents or in and to
the Collateral referred to in the Security Agreement and Stock Pledge Agreement.

         Section 10.B. Rights of Secured Creditor. The Agent and Lenders shall
have, in addition to the rights and remedies given to them under this Agreement,
the Notes and the other Loan Documents, all of the rights and remedies of a
secured party under the Uniform Commercial Code as enacted in any jurisdiction
in which any of the Collateral may be located and all rights and remedies
allowed by all applicable Laws, all of which rights and remedies shall be
cumulative and non-exclusive, to the extent permitted by said Laws. In addition
to all such rights and remedies, the sale, lease or other disposition of the
Collateral, or any part thereof, by Agent after an Event of Default may be for
cash, credit or any combination thereof, and Agent may purchase all or any part
of the Collateral at public or, if permitted by Law, private sale, and in lieu
of actual payment of such purchase price, may set-off the amount of such
purchase price against the Obligations then owing. Any sale of the Collateral
may be adjourned from time to time with or without notice. Agent may, in its
sole discretion, cause any Collateral to remain on a Borrower's premises, at the
Borrower's expense, pending sale or other disposition of such Collateral. Agent
shall have the right to conduct such sales on a Borrower's premises, at
Borrowers' expense, or elsewhere on such occasion or occasions as Agent may see
fit.

         Section 10.C. Entry Upon Premises and Access to Information. If an
Event of Default then exists, without notice, demand or legal process of any
kind, Agent may take possession of any or all of the Collateral, wherever it
might be found and for that purpose, Agent shall have the right, without
breaching the peace, to enter upon the premises of any Borrower where the
Collateral is located (or is believed to be located) without any obligation to
pay rent to any Borrower, or any other place or places under the control of any
Borrower where the Collateral is believed to be located and kept, and remove the
Collateral therefrom to the premises of Agent or any agent of Agent, for such
time as Agent may desire, in order to effectively collect or liquidate the
Collateral, and/or Agent may require any Borrower to assemble the Collateral and
make it available to Agent at a place or places to be designated by Agent. If an
Event of Default then exists, Agent shall have the right to obtain access to any
Borrower's data processing equipment, computer hardware and software relating to
the Collateral and to use all of the foregoing and the information contained
therein in any manner Agent deems appropriate which is related to the
preservation or disposition of the Collateral or to the collection of the
Obligations.

         Section 10.D. Sale or Other Disposition of Collateral by Agent. Any
notice required to be given by Agent of a sale, lease or other disposition or
other intended action by Agent with respect to any of the Collateral which is
deposited in the United States mails, postage prepaid and duly addressed to
Borrowers at the address specified in Section 11.I, at least ten (10) Business
Days prior to such proposed action, shall constitute fair and reasonable notice
to Borrowers of any such action. The net proceeds realized by the Lenders upon
any such sale or other disposition, after deduction for the reasonable expenses
of retaking, holding, preparing for sale, selling or the like and the reasonable
attorneys' fees and legal expenses incurred by Agent or 

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Lenders in connection therewith, shall be applied as provided herein toward
satisfaction of the Obligations. The Lenders shall account to Borrowers for any
surplus realized upon any such sale or other disposition, and Borrowers shall
remain liable for any deficiency. The commencement of any action, legal or
equitable, or the rendering of any judgment or decree for any deficiency shall
not affect Agent's Lien on the Collateral until the Obligations are fully paid.
Borrowers agree that Agent has no obligation to preserve rights to the
Collateral against any other parties. To the extent Borrowers have the power,
without violating the terms of any agreement existing as of the Closing Date, to
grant such a license, Agent is hereby granted a license or other right to use,
without charge, any Borrower's labels, patents, production certificates, type
certificates, supplemental certificates, copyrights, rights of use of any name,
trade secrets, trade names, tradestyles, trademarks, service marks and
advertising matter, or any property of a similar nature, as it pertains to the
Collateral, in completing production of, advertising for sale and selling any
Collateral.

         Section 10.E. Collection of Receivables. After an Event of Default
occurs and is continuing, Agent is authorized and empowered (which authorization
and power, being coupled with an interest, is irrevocable until the last to
occur of termination of this Agreement and payment and performance in full of
all of the Obligations) in its sole and absolute discretion:

              (i) To endorse in any Borrower's name and to collect any chattel
         paper, checks, notes, drafts, instruments or other items of payment
         tendered to or received by Agent in payment of any receivable included
         in the Collateral;

              (ii) To notify, either in Agent's name or any Borrower's name,
         and/or to require any Borrower to notify, any account debtor or any
         other Person obligated under or in respect of any receivable included
         in the Collateral, of the fact of Agent's Lien thereon and of the
         collateral assignment thereof to Agent;

              (iii) To direct, either in Agent's name or any Borrower's name,
         and/or to require any Borrower to direct, any account debtor or other
         Person obligated under or in respect of any receivable to make payment
         directly to Agent of any amounts due or to become due thereunder or
         with respect thereto; and

              (iv) To demand, collect, surrender, release or exchange all or
         part of any receivable or any amounts due thereunder or with respect
         thereto, or compromise or extend or renew for any period (whether or
         not longer than the initial period) any and all sums which are now or
         may hereafter become due or owing upon or with respect to any
         receivable included in the Collateral, or enforce, by suit or
         otherwise, payment or performance of any receivable either in Agent's
         own name or in the name of any Borrower.

Under no circumstances shall Agent be under any duty to act in regard to any of
the foregoing matters. The costs relating to any of the foregoing matters,
including reasonable attorneys' fees and out-of-pocket expenses, shall be borne
solely by Borrowers whether the same are incurred 

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by Agent or Borrowers.

         Section 10.F. Rescission. If at any time after acceleration of the
maturity of the Loans, Borrowers shall pay all arrears of interest and all
payments on account of principal of the Loans which shall have become due
otherwise than by acceleration (with interest on principal and, to the extent
permitted by laws, on overdue interest, at the rates specified in this
Agreement) and all Events of Default and Defaults (other than nonpayment of
principal of and accrued interest of the Loans due and payable solely by virtue
or acceleration) shall be remedied or waived pursuant to this Agreement, then by
written notice to Borrowers, the Required Lenders may elect, in their sole
discretion, to rescind and annul the acceleration and its consequences; but such
action shall not affect any subsequent Event of Default or Default or impair any
right or remedy consequent thereon. The provisions of the preceding sentence are
intended merely to bind the Lenders to a decision which may be made at the
election of the Required Lenders; they are not intended to benefit Borrowers and
do not give Borrowers the right to require Lenders to rescind or annul any
acceleration hereunder, even if the conditions set forth herein are met.

         Section 10.G. Application of Payments. All monies received by the Agent
or any of the Lenders from the exercise of any rights or remedies shall, unless
otherwise required by applicable Law, be applied as follows:

         A. First, to the payment of all reasonable expenses (to the extent not
paid by Borrowers) actually incurred by the Agent or any of the Lenders in
connection with the exercise of such rights or remedies, including all
out-of-pocket costs and expenses of collection, reasonable attorneys' fees and
court costs, all costs incurred by any one or more of the Agent or any of the
Lenders directly or indirectly in carrying out the terms, covenants and
agreements contained in any Loan Document, together with interest thereon as
provided therein, and all other costs and expenses described in Section 8.A.6;

         B. Next, to the payment of any outstanding fees due hereunder;

         C. Next, to the payment of interest then accrued and unpaid on the
Notes ratably to each Lender in accordance with its pro rata share;

         D. Next, to the payment of principal then owing on the Notes ratably to
each Lender in accordance with its pro rata share;

         E. Next, to all of the other Obligations ratably in the proportion
which such other obligations owed to the Agent or a Lender bears to all such
other Obligations;

         F. Surplus, if any, unless a court of competent jurisdiction decrees
otherwise, to the holder(s) of any junior liens as may be required by the
provision of any applicable agreement governing Subordinated Debt and to the
Borrowers, as appropriate.

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         Section 10.H. Letters of Credit. When any Event of Default, other than
an Event of Default described in Section 9.E hereof has occurred and is
continuing, the Borrowers shall, upon demand of the Agent, and when any Event of
Default described in Section 9.E has occurred, the Borrowers shall, without
notice or demand from the Agent, immediately pay to the Agent the full Stated
Amount of each Letter of Credit, the Borrowers hereby agreeing to immediately
make each such payment and acknowledging and agreeing the Agent would not have
an adequate remedy at law for failure of the Borrowers to honor any such demand
and that the Agent shall have the right to require the Borrowers to specifically
perform such undertaking whether or not any draws had been made under the
Letters of Credit.

SECTION 11.   AGENCY PROVISIONS.

         Section 11.A. Appointment.

         (a) Each Lender hereby designates and appoints LaSalle National Bank as
Agent of such Lender under this Agreement and the Loan Documents, and each
Lender hereby irrevocably authorizes Agent to take such action on its behalf
under the provisions of this Agreement and the Loan Documents and to exercise
such powers as are set forth herein or therein, together with such other powers
as are incidental thereto. Agent agrees to act as such on the express conditions
contained in this Section 11.

         (b) The provisions of this Section 11 are solely for the benefit of
Agent and Lenders, and Borrowers shall not have any rights to rely on or enforce
any of the provisions hereof (other than as expressly set forth in Section 11.H,
Section 11.I or in Section 11.C(b)). In performing its functions and duties
under this Agreement, Agent shall act solely as Agent of Lenders and does not
assume and shall not be deemed to have assumed any obligation toward or
relationship of agency or trust with or for Borrowers.

         Section 11.B. Nature of Duties. Agent shall not have any duties or
responsibilities except those expressly set forth in this Agreement or in the
Loan Documents. The duties of Agent shall be mechanical and administrative in
nature. Agent shall not have by reason of this Agreement a fiduciary
relationship in respect of any Lender. Nothing in this Agreement or any of the
Loan Documents, expressed or implied, is intended or shall be construed to
impose upon Agent any obligation in respect of this Agreement or any of the Loan
Documents except as expressly set forth herein or therein. Each Lender
acknowledges that it has, independently and without reliance upon Agent or any
other Lender and based on such documents and information as it has deemed
appropriate, made its own credit analysis and decision to enter into this
Agreement and other Loan Documents, made its own independent investigation of
the financial condition and affairs of Borrowers in connection with the making
and the continuance of the Loans and its Commitment hereunder, and made and
shall continue to make its own appraisal of the creditworthiness of Borrowers.
Except for notices, reports and other documents and information expressly
required to be furnished to the Lenders by the Agent hereunder, Agent shall not
have any duty or responsibility, either initially or on a continuing basis, to
provide any 

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Lender with any credit or other information with respect to Borrowers, whether
coming into its possession before the Closing Date or at any time or times
thereafter. If Agent seeks the consent or approval of the Required Lenders to
the taking or refraining from taking any action hereunder, Agent shall send
notice thereof to each Lender. Agent shall promptly notify each Lender at any
time that the Required Lenders have instructed Agent to act or refrain from
acting pursuant hereto.

         Section 11.C. Distribution and Apportionment of Payments. Payments
actually received by Agent for the account of Lenders shall be paid to them
promptly after receipt thereof by Agent, provided that Agent shall pay to such
Lenders interest thereon, at the lesser of (i) Federal Funds Rate and (ii) the
rate of interest applicable to such Loans, from the Business Day following
receipt of such funds by Agent until such funds are paid to such Lenders. So
long an there does not exist an Event of Default, all payments of principal and
interest in respect of outstanding Loans, all payments of the fees described in
this Agreement, and all payments in respect of any other Obligations shall be
allocated among such of Lenders as are entitled thereto, in proportion to their
respective pro rata shares or otherwise as provided herein. Agent shall promptly
distribute to each Lender at its primary address set forth on the appropriate
counterpart signature page hereof or on the Assignment and Acceptance, or at
such other address as a Lender may request in writing, such funds as it may be
entitled to receive, provided that Agent shall in any event not be bound to
inquire into or determine the validity, scope or priority of any interest or
entitlement of any Lender and may suspend all payments and seek appropriate
relief (including without limitation instructions from Required Lenders or an
action in the nature of interpleader) in the event of any doubt or dispute as to
any apportionment or distribution contemplated hereby. The order of priority
herein is set forth solely to determine the rights and priorities of Lenders as
among themselves and may at any time or from time to time be changed by Lenders
as they may elect, in writing, without necessity of notice to or consent of or
approval by Borrowers or any other Person.

         Section 11.D. Rights, Exculpation, Etc. Neither Agent, any Affiliate of
Agent, nor any of their respective officers, directors, employees, agents,
attorneys or consultants, shall be liable to any Lender for any action taken or
omitted by them hereunder or under any of the Loan Documents, or in connection
herewith or therewith, except that Agent shall be liable for its gross
negligence or willful misconduct in the performance of its express obligations
hereunder. Agent shall not be liable for any apportionment or distribution of
payments made by it in good faith pursuant to Section 11.C, and if any such
apportionment or distribution is subsequently determined to have been made in
error the sole recourse of any Person to whom payment was due, but not made,
shall be to recover from the recipients of such payments any payment in excess
of the amount to which they are determined to have been entitled. Agent shall
not be responsible to any Lender for any recitals, statements, representations
or warranties herein or for the execution, effectiveness, genuineness, validity,
enforceability, collectibility or sufficiency of this Agreement, or any of the
other Loan Documents, or any of the transactions contemplated hereby and
thereby; or for the financial condition of Borrowers. Agent shall not be
required to make any inquiry concerning or to ascertain either the performance
or observance of any of the

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terms, provisions or conditions of this Agreement or any of the Loan Documents,
or the financial condition of Borrowers, or the existence or possible existence
of any Default or Event of Default, or to inspect the property of the Borrowers.
Agent may at any time request instructions from Lenders with respect to any
actions or approvals which by the terms of this Agreement or of any of the Loan
Documents Agent is permitted or required to take or to grant, and if such
instructions are promptly requested, Agent shall be absolutely entitled to
refrain from taking any action or to withhold any approval and shall not be
under any liability whatsoever to any Person for refraining from any action or
withholding any approval under any of the Loan Documents until it shall have
received such instructions from Required Lenders. Without limiting the
foregoing, no Lender shall have any right of action whatsoever against Agent as
a result of Agent acting or refraining from acting under this Agreement or any
of the other Loan Documents in accordance with the instructions of Required
Lenders.

         Section 11.E. Reliance. Agent shall be entitled to rely upon any
written notices, statements, certificates, orders or other documents or any
telephone message believed by it in good faith to be genuine and correct and to
have been signed, sent or made by the proper Person, and with respect to all
matters pertaining to this Agreement or any of the Loan Documents and its duties
hereunder or thereunder, upon advice of legal counsel (including counsel for
Borrowers), independent public accountants and other experts selected by it.

         Section 11.F. Indemnification. To the extent that Agent is not
reimbursed and indemnified by Borrowers, Lenders will reimburse and indemnify
Agent for and against any and all liabilities, obligations, losses, damages,
penalties, actions, judgments, suits, costs, expenses or disbursements of any
kind or nature whatsoever which may be imposed on, incurred by, or asserted
against it in any way relating to or arising out of this Agreement or any of the
other Loan Documents or any action taken or omitted by Agent or under this
Agreement or any of the other Loan Documents, in proportion to each Lender's pro
rata share; provided that no Lender shall be liable for any portion of such
liabilities, obligations, losses, damages, penalties, actions, judgments, suits,
costs, expenses or disbursements resulting from Agent's gross negligence or
willful misconduct. Without limiting the foregoing, each Lender agrees to
reimburse the Agent (to the extent not reimbursed by the Borrowers) promptly
upon demand for its ratable share of any out-of-pocket expenses (including
reasonable attorneys' fees) incurred by the Agent in connection with the
preparation, administration, or enforcement of or legal advice in respect of
rights or responsibilities under any Loan Document. The obligations of Lenders
under this Section 11.F shall survive the payment in full of all Obligations and
the termination of this Agreement. In the event that after payment and
distribution of any amount by Agent to Lenders, any Lender or third-party,
including any Borrower, any creditor of any Borrower or a trustee in bankruptcy,
recovers from Agent any amount found to have been wrongfully paid to Agent or
disbursed by Agent to Lenders, then Lenders, in proportion to their respective
pro rata shares, shall reimburse Agent for all such amounts.

         Section 11.G. Agent Individually. With respect to its pro rata share of
the Commitments hereunder and the Loans made by it, Agent shall have and may
exercise the same rights and 

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powers hereunder and is subject to the same obligations and liabilities as and
to the extent set forth herein for any other Lender. The terms "Lenders" or
"Required Lenders" or any similar terms shall include Agent in its individual
capacity as a Lender or one of the Required Lenders. Agent may accept deposits
from, lend money to, and generally engage in any kind of banking, trust or other
business with any Borrower as if it were not acting as Agent pursuant hereto.

         Section 11.H. Successor Agent; Resignation of Agent; Removal Agent.

         (a) Agent may resign from the performance of all its functions and
duties hereunder at any time by giving at least thirty (30) Business Days prior
written notice to Lenders and Borrowers. Required Lenders may remove Agent at
any time by giving at least thirty (30) Business Days prior written notice to
Agent, Borrowers and all other Lenders. Such resignation or removal shall take
effect upon the acceptance by a successor Agent of appointment pursuant to
clauses (b) and (c) below or as otherwise provided below.

         (b) Upon any such notice of resignation by or removal of Agent,
Required Lenders shall appoint a successor Agent with the consent of Borrowers
(which may not be unreasonably withheld).

         (c) If a successor Agent shall not have been so appointed within said
thirty (30) Business Day period, the retiring or removed Agent, with the consent
of Borrowers (which may not be withheld unreasonably), shall then appoint a
successor Agent who shall serve as Agent until such time, if any, as Required
Lenders, with the consent of Borrowers, appoint a successor Agent as provided
above.

         Section 11.I. Agency Provisions Relating to Collateral.

         (a) Each Lender authorizes and directs Agent to enter into the Loan
Documents for the benefit of the Lenders. Each Lender agrees that any action
taken by Agent or Required Lenders in accordance with the provisions of this
Agreement or the Loan Documents, and the exercise by Agent or Required Lenders
of the powers set forth herein or therein, together with such other powers as
are reasonably incidental thereto, shall be authorized and binding upon all
Lenders.

         (b) Agent is hereby authorized on behalf of all Lenders, without the
necessity of any notice to or further consent from any Lender, from time to time
prior to an Event of Default, to take any action with respect to any Collateral
or Loan Documents which may be necessary to perfect and maintain perfected
Agent's Liens upon the Collateral granted pursuant to the Loan Documents.

         (c) Lenders hereby irrevocably authorize Agent, at its option and in
its discretion, to release any Lien granted to or held by Agent upon any
Collateral (i) upon termination of the Commitments and payment and satisfaction
of all Obligations which have matured and which

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Agent has been notified in writing are then due and payable; or (ii)
constituting property being sold or disposed of if Borrowers certify to Agent
that the sale or disposition is made in compliance with this Agreement (and
Agent may rely conclusively an any such certificate, without further inquiry);
or (iii) constituting property in which no Borrower owned an interest at the
time the Lien was granted or at any time thereafter; or (iv) if approved,
authorized or ratified in writing by Agent at the direction of all Lenders. Upon
request by Agent at any time, Lenders will confirm in writing Agent's authority
to release particular types or items of Collateral pursuant to this Section
11.I.

         (d) Without in any manner limiting Agent's authority to act without any
specific or further authorization or consent by all Lenders (as set forth in
Section 11.I(b)), each Lender agrees to confirm in writing, upon request by
Borrowers, the authority to release Collateral conferred upon Agent under
clauses (i) through (iv) of Section 11.I(c). So long as no Event of Default is
then continuing, upon receipt by Agent of any such written confirmation from all
Lenders of its authority to release any particular items or types of Collateral,
and in any event upon any sale and transfer of Collateral which is expressly
permitted pursuant to the terms of this Agreement, and upon at least five (5)
Business Days prior written request by Borrowers, Agent shall (and is hereby
irrevocably authorized by Lenders to) execute such documents as may be necessary
to evidence the release of the Liens granted to Agent for the benefit of Lenders
herein or pursuant hereto upon such Collateral; provided, that (i) Agent shall
not be required to execute any such document on terms which, in Agent's opinion,
would expose Agent to liability or create any obligation or entail any
consequence other than the release of such Liens without recourse or warranty,
and (ii) such release shall not in any manner discharge, affect or impair the
Obligations or any Liens upon (or obligations of Borrowers in respect of) all
interests retained by Borrowers, including without limitation the proceeds of
any sale, all of which shall continue to constitute part of the Collateral.

         (e) Agent shall have no obligation whatsoever to any Lender or to any
other Person to assure that the Collateral exists or is owned by Borrowers or is
cared for, protected or insured or has been encumbered or that the Liens granted
to Agent herein or pursuant hereto have been properly or sufficiently or
lawfully created, perfected, protected or enforced or are entitled to any
particular priority, or to exercise at all or in any particular manner or under
any duty of care, disclosure or fidelity, or to continue exercising, any of the
rights, authorities and powers granted or available to Agent in this Section
11.I or in any of the Loan Documents, it being understood and agreed that in
respect of the Collateral, or any act, omission or event related thereto, Agent
may act in any manner it may deem appropriate, in its sole discretion, given
Agent's own interest in the Collateral as one of the Lenders and that Agent
shall have no duty or liability whatsoever to any Lender.

         Section 11.J. Actions Against Collateral. Each Lender agrees that it
will not take any action, nor institute any actions or proceedings, against any
Borrower or any other obligor hereunder with respect to exercising claims
against or rights in any Collateral without the consent of the Required Lenders.

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         SECTION 12. MISCELLANEOUS.

         Section 12.A. Assignments and Participations.

         (a) With the prior consent of the Agent and Stericycle (which consent
shall not be unreasonably withheld or delayed), a Lender may assign to one or
more banks or other financial institutions all or a portion of its rights and
obligations under this Agreement (including without limitation all or a portion
of its Commitments, the Loans owing to it, and participation in Letters of
Credit); provided, however, that (i) each such assignment shall be of a
constant, and not a varying, percentage of such Lender's rights and obligations
under this Agreement, (ii) unless the Agent otherwise consents, the aggregate
amount of the Commitments of such Lender being assigned pursuant to each such
assignment (determined as of the date of the Assignment and Acceptance with
respect to such assignment) shall in no event be less than Five Million Dollars
($5,000,000) and shall be an integral multiple of One Million Dollars
($1,000,000) and (iii) the parties to each such assignment shall execute and
deliver to Agent, for its approval and acceptance, an Assignment and Acceptance
in the form of Exhibit L hereto (an "Assignment and Acceptance"); provided,
further that any Lender, without the consent of the Agent, may assign all or
part of its rights and obligations to any Affiliate of the assigning Lender.
Upon such execution, delivery, approval and acceptance of the Assignment and
Acceptance, and upon the effective date specified therein, (a) the assignee
thereunder shall be a party hereto and, to the extent that rights and
obligations hereunder have been assigned to it pursuant to such Assignment and
Acceptance, have the rights and obligations of a Lender hereunder and (b) the
Lender-assignor thereunder shall, to the extent that rights and obligations
hereunder have been assigned by it pursuant to such Assignment and Acceptance,
relinquish its rights and be released from its obligations under this Agreement.

         (b) By executing and delivering an Assignment and Acceptance, the
Lender-assignor thereunder and the assignee thereunder confirm to and agree with
each other and the other parties hereto as follows: (i) other than as provided
in such Assignment and Acceptance, such assigning Lender makes no representation
or warranty and assumes no responsibility with respect to any statements,
warranties or representation made in or in connection with this Agreement or any
other Loan Document or the execution, legality, validity, enforceability,
genuineness sufficiency or value of this Agreement or any other Loan Document or
any other instrument or document furnished pursuant hereto; (ii) such assigning
Lender makes no representation or warranty and assumes no responsibility with
respect to the financial condition of Borrowers or the performance or observance
by Borrowers of any of their obligations under any Loan Documents or any other
instrument or document furnished pursuant hereto; (iii) such assignee confirms
that it has received a copy of this Agreement, together with copies of Financial
Statements and such other Loan Documents and other documents and information as
it has deemed appropriate to make its own credit analysis and decision to enter
into such Assignment and Acceptance; (iv) such assignee will, independently and
without reliance upon Agent, such assigning Lender or any other Lender and based
on such documents and information as it shall deem appropriate at the time,
continue to make its own credit decisions in taking or not taking action under
this

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Agreement; (v) such assignee appoints and authorizes Agent to take such action
as Agent on its behalf and to exercise such powers under this Agreement and the
other Loan Document as are delegated to Agent by the terms hereof and thereof,
together with such powers as are reasonably incidental thereto; and (vi) such
assignee agrees that it will perform in accordance with their terms all of the
obligations which by the terms of this Agreement are required to be performed by
it as a Lender.

         (c) Agent shall maintain at its address referred to on the counterpart
signature pages hereof a copy of each Assignment and Acceptance delivered to and
accepted by it and shall record the names and addresses of each Lender and the
Commitment of, and principal amount of the Loans owing to, such Lender from time
to time. Borrowers, Agent and Lenders may treat each Person whose name is
recorded in the records of the Agent as a Lender hereunder for all purposes of
this Agreement.

         (d) Upon its receipt of an Assignment and Acceptance executed by an
assigning Lender and an assignee, Agent shall, if such Assignment and Acceptance
has been properly completed and is in substantially the form of Exhibit L, (i)
accept such Assignment and Acceptance, (ii) record the information contained
therein and (iii) give prompt notice thereof to Borrowers.

         (e) With the prior consent of the Agent (which consent shall not be
unreasonably withheld) each Lender may sell participations in or to all or a
portion of its rights and obligations under this Agreement (including without
limitation all or a portion of its Commitment, the Loans owing to it and
participations in Letters of Credit); provided, however, that in connection with
any such sale, (i) such Lender's obligations under this Agreement (including
without limitation its Commitment to Borrowers hereunder) shall remain
unchanged, (ii) such Lender shall remain solely responsible to the other parties
hereto for the performance of such obligations, (iii) Borrowers, Agent and the
other Lenders shall continue to deal solely and directly with such Lender in
connection with such Lender's rights and obligations under this Agreement and
with regard to any and all payments to be made under this Agreement, (iv) the
holder of any such participation shall not be entitled to voting rights under
this Agreement except for voting rights with respect to the amendment or
modification of those provisions of this Agreement for which the consent of all
Lenders would be required; and (v) any party to which such a participation has
been granted shall have the benefits of Sections 3.J. and 3.K. but shall not be
entitled to receive any greater payment under either such Section than the
Lender granting such participation would have been entitled to receive with
respect to the rights transferred. No such participant shall have any rights
under this Agreement except as provided in this Section 12.A.(e).

         (f) Borrowers will cooperate with Agent and Lenders in connection with
the assignment of interests under this Agreement or the sale of participations
herein.

         (g) Anything in this Agreement to the contrary notwithstanding, and
without the need to comply with any of the formal or procedural requirements of
this Agreement, any Lender 

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may at any time and from time to time pledge and assign all or any portion of
its rights under all or any of the Loan Documents to a Federal Reserve Agent;
provided that no such pledge or assignment shall release such Lender from its
obligations thereunder. To facilitate any such pledge or assignment, Agent
shall, at the request of such Lender, enter into a letter agreement with the
Federal Reserve Agent in, or substantially in, the form of the exhibit to
Appendix C to the Federal Reserve Agent of New York Operating Circular No. 12.

         Section 12.B. Ratable Sharing. Subject to Sections 3.C(d) and 11.C, and
unless otherwise specifically stated herein, Lenders agree among themselves that
(i) with respect to all amounts received by them which are applicable to the
payment of the Obligations, equitable adjustment will be made so that, in
effect, all such amounts will be shared among then ratably in accordance with
their pro rata shares, whether received by voluntary payment, by the exercise of
the right of set-off or banker's lien, by counterclaim or cross action or by the
enforcement of any or all of the Obligations or the Collateral, (ii) if any of
them shall by voluntary payment or by the exercise of any right of counterclaim,
set-off, banker's lien or otherwise, receive payment of a proportion of the
aggregate amount of the obligations held by it which is greater than its pro
rata share of the payments on account of the Obligations, the one receiving such
excess payment shall purchase, without recourse or warranty, an undivided
interest and participation (which it shall be deemed to have done simultaneously
upon the receipt of such payment) in such obligations owed to the others so that
all such recoveries with respect to such Obligations shall be applied ratably in
accordance with their pro rata shares; provided, that if all or part of such
excess payment received by the purchasing party is thereafter recovered from it,
those purchases shall be rescinded and the purchase prices paid for such
participation shall be returned to that party to the extent necessary to adjust
for such recovery, but without interest except to the extent the purchasing
party is required to pay interest in connection with such recovery. Borrowers
agree that any Lender so purchasing a participation from another Lender pursuant
to this Section 12.B may, to the fullest extent permitted by law, exercise all
its rights of payment with respect to such participation as fully as if such
Lender were the direct creditor of Borrowers in the amount of such
participation.

         Section 12.C. Withholding Taxes. Except as otherwise required by Law,
each payment by the Borrowers under this Agreement or the Notes or in respect of
the Letters of Credit shall be made without setoff or counterclaim and without
withholding for or on account of any present or future taxes imposed by or
within the jurisdiction in which any Borrower is domiciled, any jurisdiction
from which the Borrowers make any payment hereunder, or (in each case) any
political subdivision or taxing authority thereof or therein (excluding any such
tax imposed on the overall net income of any Lender or its Lending Office). If
any such withholding is so required, the Borrowers shall make the withholding,
pay the amount withheld to the appropriate governmental authority before
penalties attach thereto or interest accrues thereon and forthwith pay such
additional amount as may be necessary to ensure that the net amount actually
received by each Lender and the Agent free and clear of such taxes (including
such taxes on such additional amount) is equal to the amount which that Lender
or the Agent would have received had such withholding not been made. If the
Agent or any Lender pays any amount in respect of any such 

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taxes, penalties or interest, the Borrowers shall reimburse the Agent or that
Lender for that payment on demand in the currency in which such payment was
made. If a Borrower pays any such taxes, penalties or interest, it shall deliver
official tax receipts evidencing that payment or certified copies thereof to the
Agent on or before the thirtieth day after payment.

         Section 12.D. Amendment and Waivers. No amendment or modification of
any provision of this Agreement shall be effective without the written agreement
of Required Lenders (after notice to all Lenders, which notice may be oral) and
Borrowers, and no termination or waiver of any provision of this Agreement, or
consent to any departure by Borrowers therefrom, shall in any event be effective
without the written concurrence of Required Lenders (after notice to all
Lenders, which notice may be oral), which Required Lenders shall have the right
to grant or withhold at their sole discretion, except that any amendment,
modification or waiver of any provision of Section 2 hereof relating to any
increase of the Commitments or any Lender's Commitment, to the principal amount,
amortization and final maturity of the Loans, to the reduction of interest rates
applicable to the Loans, to the rates at which the fees payable to the Agent for
the ratable benefit of the Lenders pursuant hereto are determined, to the
forgiveness of any amount payable or receivable under Section 2, to the
definition of "Required Lenders" and "pro rata", to the level of consent
required to release Collateral, and to the provisions contained in this Section
12.D shall be effective only if evidenced by a writing signed by or on behalf of
all Lenders, provided that notwithstanding the foregoing, the consent or
approval of a Lender will not be required if such amendment, modification or
waiver does not affect such Lender. No amendment, modification, termination or
waiver of any provision of Section 11 hereof or any other provision referring to
Agent shall be effective without the written concurrence of Agent. Agent may,
but shall have no obligation to, with the concurrence of any Lender, execute
amendments, modifications, waivers or consents on behalf of such Lender. Any
waiver or consent shall be effective only in the specific instance and for the
specific purpose for which it was given. No notice to or demand on Borrowers in
any case shall entitle Borrowers to any further notice or demand in similar or
other circumstances. Any amendment, modification, termination, waiver or consent
effected in accordance with this Section 12.D. shall be binding on each
assignee, transferee or recipient of Agent's or any Lender's Commitment or the
Loans at the time outstanding.

         Section 12.E. Merger and Integration Clause. This Agreement and the
Loan Documents contain the entire agreement among the parties hereto with
respect to the subject matter hereof and specifically supersedes in its entirety
the proposal letter of the Agent to Stericycle dated September 14, 1998, and any
prior and subsequent drafts thereof or proposals or letters from the Agent with
respect to the terms of credit facilities hereunder or any other matter which is
the subject matter of this Agreement or any of the Loan Documents.

         Section 12.F. Applicable Law. This Agreement, the Notes and the other
Loan Documents have been executed, issued, delivered and accepted in and shall
be deemed to have been made under and shall be governed by and construed in
accordance with the Laws of the State of Illinois.

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         Section 12.G. Severability. This Agreement, the Notes and the other
Loan Documents shall be construed and interpreted in such manner as to be
effective, enforceable and valid under all applicable Laws. If any provision of
this Agreement, the Notes or the other Loan Documents shall be held invalid,
prohibited or unenforceable under any applicable Laws of any applicable
jurisdiction, such invalidity, prohibition or unenforceability shall be limited
to such provision and shall not affect or invalidate the other provisions hereof
or thereof or affect the validity or enforceability of such provision in any
other jurisdiction, and to that extent, the provisions hereof and thereof are
severable.

         Section 12.H. Section Headings. Section headings used in this Agreement
are for convenience only and shall not effect the construction or interpretation
of this Agreement.

         Section 12.I. Binding Effect. This Agreement shall be binding upon and
inure to the benefit of the Agent, the Lenders and the Borrowers, and their
respective successors and assigns; provided, however, that the Borrowers have no
right to assign any of its rights or its obligations hereunder without the prior
written consent of all Lenders.

         Section 12.J. Notices. Any notices, requests or consents required or
permitted by this Agreement shall be (i) in writing, and (ii) delivered in
person, telexed, telecopied or sent by certified or registered mail, postage
prepaid, return receipt requested, or by overnight mail or express delivery
service to the addresses of the parties hereto set forth below on the signature
pages, unless such address, telex number or telecopier number is changed by
written notice hereunder. Each such notice, request, consent or other
communication shall be effective (i) if given by telecopier, when such telecopy
is transmitted to the telecopier number specified on the signature page hereof
and a confirmation of such telecopy has been received by the sender, (ii) if
given by telex, when such telex is transmitted to the telex number specified on
the signature page hereof and the answerback is received by sender, (iii) if
given by mail, five (5) days after such communication is deposited in the mail,
certified or registered with return receipt requested, addressed as aforesaid or
(iv) if given by any other means, when delivered at the addresses specified on
the signature page hereof; provided that any notice given pursuant to Sections 2
and 3 hereof shall be effective only upon receipt.

         Section 12.K. Counterparts. This Agreement may be executed in any
number of counterparts, and by the different parties on different counterparts,
each of which when executed shall be deemed an original but all such
counterparts taken together shall constitute one and the same instrument.

         Section 12.L. Indemnification. In addition to the agreements of the
Borrowers under the Environmental Indemnity Agreement, each Borrower hereby
indemnities, exonerates and holds free and harmless the Agent, each Lender, each
of their Affiliates and each of their officers, directors, employees, agents-and
attorneys (collectively, the "Indemnified Parties" or, individually, an
"Indemnified Party"), from and against any and all actions, causes of action,
suits, proceedings, investigations, losses, costs, liabilities, damages,
punitive damages, penalties 

                                      106
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and expenses, including reasonable attorneys' and paralegals' fees and
disbursements (the "Indemnified Liabilities"), incurred by the Indemnified
Parties or any of them as a result of, or arising out of, or relating to
(irrespective of whether such Indemnified Party is a party to the action for
which indemnification hereunder is sought):

              (a) any transaction financed or to be financed in whole or in
         part, directly or indirectly, with the proceeds of any Loan;

              (b) the entering into and performance under this Agreement or any
         other Loan Document or by any party thereto; or

              (c) any investigation, litigation, or proceeding related to any
         acquisition or proposed acquisition by any of the Borrowers of all or
         any portion of the stock or all or substantially all the assets of any
         Person, whether or not the Agent is party thereto and whether or not
         the proceeds of any Loans are used or to be used in connection
         therewith; except for any such Indemnified Liabilities arising by
         reason of an Indemnified Party's gross negligence or wilful misconduct.
         In addition, if any Borrower institutes any action, suit or proceeding
         against any of the Indemnified Parties and such action, suit or
         proceeding is unsuccessful, the Borrowers shall indemnify and hold
         harmless the Indemnified Parties from and against all Indemnified
         Liabilities arising in connection with or relating to such action, suit
         or proceeding. The Borrowers shall pay or reimburse the Indemnified
         Parties for any Indemnified Liabilities from time to time within thirty
         (30) days after demand. This Section and the agreements of the
         Borrowers set forth herein shall survive the termination of this
         Agreement and any or all of the Loan Documents and repayment of all of
         the Obligations hereunder and thereunder. If and to the extent that the
         undertaking described in this Section 12.L. is held or determined by
         any court of competent jurisdiction to be unenforceable for any reason,
         the Borrowers hereby agree to make the maximum contribution to the
         payment and satisfaction of each of the Indemnified Liabilities which
         is permissible under applicable Laws.

         Section 12.M. Independence of Covenants. All covenants hereunder shall
be given independent effect so that if a particular action or condition is not
permitted by any of such covenants, the fact that it would be permitted by an
exception to, or be otherwise within the limitations of, another covenant shall
not avoid the occurrence of an Event of Default or Default if such action is
taken or condition exists, and if a particular action or condition is expressly
permitted under any covenant, unless expressly limited to such covenant, the
fact that it would not be permitted under the general provisions of another
covenant shall not constitute an Event of Default or Default if such action is
taken or condition exists.

         Section 12.N. Marshalling; Recourse to Security; Payments Set Aside.
Neither any Lender nor the Agent shall not be under any obligation to marshall
any assets in favor of Borrowers or any other party or against or in payment of
any or all of the Obligations. Recourse to security shall not be required at any
time. To the extent that Borrowers make a payment or

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payments to the Agent or the Lenders or the Agent or Lenders enforce their Liens
or exercise their rights of setoff, and such payment or payments or the proceeds
of such enforcement of setoff or any part thereof are subsequently invalidated,
declared to be fraudulent or preferential, set aside and/or required to be
repaid to a trustee, receiver or another party under any bankruptcy law, state
or federal law, common law or equitable cause, then to the extent of such
recovery, the obligation or part thereof originally intended to be satisfied,
and all Liens, rights and remedies therefor, shall be revived and continued in
full force and effect as if such payment had not been made or such enforcement
or setoff had not occurred.

         Section 12.O. Limitation of Liability. To the extent permitted by
applicable Law, no claim may be made by Borrowers, any Lender or any other
Person against Agent or any Lender, or Affiliates, directors, officers,
employees, attorneys or agents of any of them, for special, indirect,
consequential or punitive damages in respect of any claim for breach of contract
or any other theory of liability arising out of or related to the transactions
contemplated by this Agreement, or any act, omission or event occurring in
connection therewith; and Borrowers, Agent and each Lender hereby waive, release
and agree not to sue upon any claim for any such damages, whether or not accrued
and whether or not known or suspected to exist in its favor.

         Section 12.P. Consent to Jurisdiction and Waiver of Jury Trial and
Personal Service. EACH BORROWER EXPRESSLY SUBMITS AND CONSENTS TO THE
JURISDICTION OF ANY STATE OR FEDERAL COURT LOCATED WITHIN COOK COUNTY, ILLINOIS
IN ANY ACTION, SUIT OR PROCEEDING (WHETHER IN CONTRACT OR TORT, AT LAW OR IN
EQUITY) COMMENCED THEREIN IN CONNECTION WITH OR WITH RESPECT TO THE OBLIGATIONS,
THIS AGREEMENT, THE NOTES OR ANY OTHER LOAN DOCUMENTS (INCLUDING, WITHOUT
LIMITATION, ANY DEFENSES OR COUNTER CLAIMS THEREIN), AND EACH BORROWER, THE
AGENT AND THE LENDERS EACH WAIVE ANY RIGHT TO JURY TRIAL THAT THEY MAY NOW OR
HEREAFTER HAVE UNDER ANY LAWS AND ANY OBJECTION TO VENUE IN CONNECTION
THEREWITH. EACH BORROWER HEREBY WAIVES PERSONAL SERVICE OF ANY AND ALL PROCESS
OR PAPERS ISSUED OR SERVED IN CONNECTION WITH THE FOREGOING AND AGREES THAT
SERVICE OF SUCH PROCESS OR PAPERS MAY BE MADE BY REGISTERED OR CERTIFIED MAIL,
POSTAGE PREPAID, RETURN RECEIPT REQUESTED, DIRECTED TO THE BORROWERS AS SET
FORTH IN SECTION 12.J. ABOVE AND THE BORROWERS' REGISTERED AGENTS, IN WHICH CASE
SUCH PROCESS OR PAPERS SHALL BE DEEMED RECEIVED FIVE (5) DAYS THEREAFTER, OR BY
OVERNIGHT MAIL OR EXPRESS DELIVERY SERVICE, IN WHICH CASE SUCH PROCESS OR PAPERS
SHALL BE DEEMED RECEIVED ONE (1) DAY THEREAFTER.

         Section 12.Q. Nature of Borrowers' Obligations. Each Borrower
acknowledges and agrees that the liability of each Borrower for all Obligations,
and under this Agreement and each Loan Document, is joint and several.

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         Section 12.R.  Mutual Guaranty and Subordination by Borrowers.

         (a) Guaranty. Each Borrower hereby guarantees and agrees to timely and
completely pay, perform and discharge when due (whether by acceleration or
otherwise) all of the Loans made by the Lenders to, and all of the other
Obligations of, the other Borrowers to the Agent and the Lenders, their
successors and assigns, including, without limitation, all payments of interest
and principal under the Notes and all costs and expenses for which any Borrower
is liable under any of the Loan Documents. Each Borrower agrees that the
obligations and liabilities of such Borrower pursuant to this Section 12.R shall
be absolute and unconditional, and the rights and remedies of the Agent and the
Lenders hereunder shall not be impaired and shall remain in full force and
effect regardless of:

              (i)   the genuineness, validity, enforceability, assignment or
         purported assignment of all or any part of this Agreement, the Notes,
         or any other Loan Documents;

              (ii)  any amendment, extension, modification, release, waiver,
         discharge, settlement or compromise of or with respect to the
         Obligations or with respect to the Loan Documents, whether granted to a
         Borrower by the Agent or Lenders or by operation of law or under any
         bankruptcy, reorganization, liquidation, dissolution or similar
         proceedings, without prior or other notice to or the consent of the
         other Borrowers;

              (iii) any delay, failure, neglect, commission or omission by or on
         behalf of the Agents or Lenders, without the consent of a Borrower, to
         enforce, assert or exercise any of its rights, powers or remedies under
         this Agreement, the Notes, or any other Loan Documents, which shall in
         no event be construed as a waiver of any such rights, powers or
         remedies; or

              (iv)  the liquidation, sale or marshalling of all, or
         substantially all, of the assets of any Borrower or any receivership,
         insolvency, bankruptcy, reorganization, arrangement, composition,
         readjustment or other similar proceeding or action involving any
         Borrower or an assignment for the benefit of the creditors of any
         Borrower.

Each Borrower agrees that the obligations and liabilities to the Agent and
Lenders under this Section 12.R constitute a direct payment obligation and not a
guaranty of collection, such that the Agent and Lenders may, at its sole option
and discretion, proceed directly against any Borrower without proceeding against
or exercising or exhausting any of their rights or remedies against the other
Borrowers under any of the Loan Documents. Each Borrower hereby agrees that, to
the extent the Agent or any Lender receives or applies any payments to the
Obligations which are subsequently set aside for being wholly or partially
invalid, fraudulent or preferential or which are required to be repaid to any
Borrower, any party to the Loan Documents or to any estate, trustee, receiver or
any other party, whether under any state or federal bankruptcy, insolvency,
fraudulent conveyance, preference or similar law affecting creditors' rights
generally or otherwise, then, to such extent, the guaranty, liabilities and
obligations of each Borrower hereunder shall be

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reinstated as though such payments had not been so received or applied.

         (b) Waiver. Until the satisfaction and full and final payment of all of
the Obligations, each Borrower hereby waives and releases any and all claims for
and rights of subrogation, indemnification, reimbursement, restitution,
exoneration and contribution against, and any other right to receive payment
from or participate in any claim brought by any other person against, the other
Borrowers or any other party or person which exists or arises on account of or
by reason of any payment made or performance by a Borrower hereunder or in
respect of the Obligations, whether such claim or right is now existing or is
hereafter acquired or arising and whether arising hereunder, in equity, by
operation of law or contract or otherwise, and each Borrower agrees not to
assert against the other Borrowers or any other person or party at any time any
of such claims or rights or any other remedy of whatsoever kind or nature in
favor of a Borrower existing or arising by reason of the foregoing.

         (c) Subordination. All indebtedness, liabilities and obligations of a
Borrower to the other Borrowers, or any claims or causes of action of a Borrower
against the other Borrowers, shall be and hereby are made subject to, postponed,
subordinated and junior in right of payment to the satisfaction and payment in
full of all of the Obligations of each Borrower to the Agent and Lenders arising
under this Agreement, the Notes and any other Loan Documents or in any other
manner arising or existing, and any payment by a Borrower or other distribution
of property of a Borrower to the other Borrowers in payment of any indebtedness,
liabilities or obligations (the "Intercompany Debt") prior to satisfaction or
payment in full of the Obligations, while the Loans or Commitments therefor are
outstanding, shall be received in trust by such Borrower and promptly turned
over to the Agent, provided, however, that so long as no Event of Default has
occurred or is continuing, repayment of loans and advances in accordance with
the terms hereof by any Borrower to any other Borrower shall not be prohibited
or postponed. Each Borrower will mark its books and records and cause any
promissory note or other instrument evidencing the Intercompany Debt to clearly
indicate that the Intercompany Debt is subordinated hereby to the Obligations.
Each Borrower will, upon demand of the Agent, cause any Intercompany Debt not
evidenced by a promissory note or other instrument to be so evidenced and, as
security for the Obligations, endorse with recourse such notes or instruments to
the Agent and otherwise assign to the Agent any and all Intercompany Debt and
any and all security therefor. In the event any receivership, insolvency,
bankruptcy, reorganization, arrangement, composition, readjustment or other
similar proceedings are commenced or instituted by or against a Borrower, the
Obligations shall be paid in full before any Borrower shall be entitled to
receive or retain any payment or distribution in respect to the Intercompany
Debt, and, in order to implement the foregoing, (a) all payments and
distributions of any kind or character, whether in cash, property or securities
in respect of the Intercompany Debt to which a Borrower would be entitled shall
be made directly to the Agent, (b) each Borrower shall promptly file a claim or
claims, in the form required in such proceedings, for the full outstanding
amount of the Intercompany Debt, and shall use its best efforts to cause such
claim or claims to be approved and all payments and other distributions in
respect thereof to be made directly to the Agent, and (c) each Borrower hereby
irrevocably agrees that the Agent may, in its sole discretion, in the name of
such Borrower or

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otherwise, demand, sue for, collect, receive and receipt for any and all such
payments or distributions, and file, prove, and vote or consent in any such
proceedings with respect to, any and all claims of such Borrower relating to the
Intercompany Debt. The Borrowers will not, without the prior written consent of
the Agent, which consent shall not be unreasonably withheld or delayed: (a)
cancel, waive, forgive, transfer or assign, or subordinate any Intercompany
Debt, or security therefor, to any indebtedness other than the Obligations; (b)
attempt to accelerate, enforce or collect any Intercompany Debt; (c) take any
security for any Intercompany Debt; (d) convert any Intercompany Debt into stock
of a Borrower; or (e) commence, or join with any other creditor in commencing,
any bankruptcy, reorganization or insolvency proceedings with respect to a
Borrower.

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         IN WITNESS WHEREOF, the parties hereto have duly executed this
Agreement as of the day and year first above written.

                          BORROWERS:

                          STERICYCLE, INC.

                          By:      /s/ Frank J.M. ten Brink  
                              --------------------------------------------------
                          Name:    Frank J.M. ten Brink
                          Title:       Vice President, Finance, Chief Financial
                                       Officer and Secretary

                          Address:     1419 Lake Cook Road, Suite 410
                                       Deerfield, IL 60010
                          Telephone:   847-945-6550
                          Telecopy:    847-945-6583

                          STERICYCLE OF WASHINGTON, INC.

                          By:      /s/ Frank J.M. ten Brink                    
                              --------------------------------------------------
                          Name:    Frank J.M. ten Brink
                          Title:       Vice President

                          Address: c/o Stericycle, Inc., per above

                          STERICYCLE OF ARKANSAS, INC.

                          By:      /s/ Frank J.M. ten Brink                    
                              --------------------------------------------------
                          Name:    Frank J.M. ten Brink
                          Title:       Secretary

                          Address: c/o Stericycle, Inc., per above

                          ENVIRONMENTAL CONTROL CO., INC.

                          By:      /s/ Frank J.M. ten Brink                    
                              --------------------------------------------------
                          Name:    Frank J.M. ten Brink
                          Title:       Secretary

                          Address: c/o Stericycle, Inc., per above

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                                     AGENT:                                
                                                                           
                                     LA SALLE NATIONAL BANK, as Agent      

                                     By:      /s/ Michael Foster   
                                        ---------------------------------------
                                     Name:    Michael Foster               
                                     Title:       Senior Vice President    
                                     Address:     135 South LaSalle Street 
                                                  Chicago, Illinois 60603  
                                     Telephone:   312-904-6683             
                                     Telecopy:    312-904-8544             
                                                                           
                                     LENDERS:                              

Address and Amount                                                         
of Commitment:                                                             
                                     LA SALLE NATIONAL BANK                

135 South LaSalle Street                                                   
Chicago, Illinois  60603             By:      /s/ Michael Foster       
                                        ---------------------------------------
                                     Name:        Michael Foster           
                                     Title:       Senior Vice President    
                                                                           
Telephone:  312-904-6683                                                   
Telecopy:   312-904-8544                                                   
                                                                           
Lending Offices:                     135 South LaSalle Street              
                                     Chicago, Illinois  60603              
                                                                           
         Prime Rate Loan:            135 South LaSalle Street              
                                     Chicago, Illinois 60603               
                                                                           
         LIBOR Loans:                135 South LaSalle Street              
                                     Chicago, Illinois 60603               
Amount of Commitments:                                                     
         A Revolving Loans           $ 5,000,000
         B Revolving Loans           $15,000,000

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                                    EXHIBITS

Exhibit A.        Form of A Revolving Note

Exhibit B.        Form of B Revolving Note

Exhibit C.        Form of  Term Note

Exhibit D.        Form of Borrowing Notice

Exhibit E.        Form of Estoppel Certificate for Landlords of Leaseholds

Exhibit F.        Form of Landlord's Lien Waiver

Exhibit G.        Additional Post Closing Matters Memo

Exhibit H.        Form of Compliance Certificate

Exhibit I.        New Subsidiary Certificate

Exhibit J.        Joinder and Assumption Agreement

Exhibit K.        New Subsidiary Officers' Certificate

Exhibit L.        Assignment and Acceptance

                                    SCHEDULES

Schedule 6.A.6.   UCC financing statement filing offices

Schedule 6.A.7.   Offices searched for UCC financing statements, judgments and 
                  tax liens

Schedule 6.F.3.   Holders of Permitted Liens on Equipment, from which waivers 
                  or consents to be obtained

Schedule 7.A.     Corporate organizational, ownership and related matters for
                  Borrowers

Schedule 7.C.     Required Third Party Consents

Schedule 7.F.     Pending or threatened litigation and government proceedings

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Schedule 7.G.     Existing Liens (which are included as Permitted Liens)

Schedule 7.H.     Employee Plans

Schedule 7.I.     Deficiency or additional tax assessments

Schedule 7.O.     Indebtedness to/from Affiliates

Schedule 7.Q.     Labor

Schedule 7.R.     Owned and Leased or Used Real Properties

Schedule 7.S.     Intellectual Property Rights

Schedule 7.T.     Financial Assurances

Schedule 8A.13.   3CI Liens

Schedule 8.B.2.   Existing Debt (permitted to be maintained by Borrowers)

Schedule 8.B.3.   Existing Investments (permitted to be maintained by Borrowers)

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