WMX TECHNOLOGIES INC
SC 13D, 1996-01-02
REFUSE SYSTEMS
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<PAGE>
 
                                 UNITED STATES
                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C. 20549

                                 SCHEDULE 13D

                   Under the Securities Exchange Act of 1934
                             (Amendment No. ___)*

                       SERVICEMASTER LIMITED PARTNERSHIP
                               (Name of Issuer)

                           Public Partnership Shares
                        (Title of Class of Securities)

                                  817615 10 7
                                (CUSIP Number)

                                Herbert A. Getz
                            WMX Technologies, Inc.
                             3003 Butterfield Road
                      Oakbrook, IL 60521  (708) 572-8800
                 (Name, Address and Telephone Number of Person
               Authorized to Receive Notices and Communications)

                               December 31, 1995
            (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 which is the subject of this Schedule 13D, and is filing this
schedule because of Rule 13d-1(b)(3) or (4), check the following box ( ).

Check the following box if a fee is being paid with the statement (X).  (A fee
is not required only if the reporting person:  (1) has a previous statement on
file reporting beneficial ownership of more than five percent of the class of
securities described in Item 1; and (2) has filed no amendment subsequent
thereto reporting beneficial ownership of five percent or less of such class.)
(See Rule 13d-7.)

Note:  Six copies of this statement, including all exhibits, should be filed
with the Commission.  See Rule 13d-1(a) for other parties to whom copies are to
be sent.

*  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 the purpose of Section 18 of the Securities Exchange Act of
1934 ("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).
 
 
1    NAME OF REPORTING PERSON:  WMX Technologies, Inc.
       S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON:  36-266063
 
2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP:  Not applicable
       a ( )   b ( )
3    SEC USE ONLY
4    SOURCE OF FUNDS:  OO
5    CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
       ITEMS 2(d) or 2(E):   ( )   None
6    CITIZENSHIP OR PLACE OF ORGANIZATION:  Delaware
       NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:
7    SOLE VOTING POWER:                18,107,143*
8    SHARED VOTING POWER:                       0
9    SOLE DISPOSITIVE POWER:           18,107,143*
10   SHARED DISPOSITIVE POWER:                  0
11   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON:   
       18,107,143
12   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
       CERTAIN SHARES:  ( )
13   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11):  approximately 19
14   TYPE OF REPORTING PERSON:  CO
 
* Held through a wholly-owned subsidiary, WMI Urban Services, Inc.


 
1    NAME OF REPORTING PERSON:  WMI Urban Services, Inc.
       S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON:  36-3524223
 
2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP:  Not applicable
       a ( )   b ( )
3    SEC USE ONLY
4    SOURCE OF FUNDS:  OO
5    CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
       ITEMS 2(d) or 2(E):   ( )   None
6    CITIZENSHIP OR PLACE OF ORGANIZATION:  Delaware
       NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:
7    SOLE VOTING POWER:               18,107,143
8    SHARED VOTING POWER:                      0
9    SOLE DISPOSITIVE POWER:          18,107,143
10   SHARED DISPOSITIVE POWER:                 0
11   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON:     
       18,107,143
12   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
       CERTAIN SHARES:  ( )
13   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11):  approximately 19
14   TYPE OF REPORTING PERSON:  CO
<PAGE>
 
ITEM 1.  SECURITY AND ISSUER.

     The class of equity securities to which this statement on Schedule 13D
relates is the public partnership shares (the "Partnership Shares") of
ServiceMaster Limited Partnership (the "Company"), which has its principal
executive offices at One ServiceMaster Way, Downers Grove, Illinois 60515.

     The Company's shareholders previously approved a merger whereby, among
other things, ServiceMaster Incorporated Delaware ("ServiceMaster Delaware")
will succeed to the position now held by the Company as the ultimate parent
company of the ServiceMaster enterprise (the "Reincorporating Merger").
ServiceMaster Delaware and the Company are sometimes hereinafter collectively
referred to as (the "Company").  The term "ServiceMaster Shares" used
hereinafter means any of the following which may be outstanding at a particular
time: (i) Partnership Shares; (ii) shares of common stock of ServiceMaster
Delaware; and (iii) any other equity security issued by the Company,
ServiceMaster Delaware or any company which succeeds to the business of the
Company.

ITEM 2.  IDENTITY AND BACKGROUND.

     (a) (b) (c)  This statement is being filed jointly by WMX Technologies,
Inc., a Delaware corporation ("WMX"), and WMI Urban Services, Inc., a Delaware
corporation, and a wholly-owned subsidiary of WMX ("WMUS").  The principal
business and office address of each of WMX and WMUS is 3003 Butterfield Road,
Oakbrook, Illinois 60521.  The principal business of WMX is to engage through
subsidiaries in the businesses of providing waste management services and other
related services.  The principal business of WMUS is to hold the Partnership
Shares.  The name, business address, present principal occupation and
citizenship of each executive officer and director of WMX and WMUS are set forth
in Appendix A hereto, which is incorporated herein by reference.

     (d) (e)  During the last five years, neither WMX nor WMUS, nor to the best
knowledge of WMX or WMUS, any of their respective executive officers or
directors, has been convicted in any criminal proceeding (excluding traffic
violations or similar misdemeanors) or has been a party to a civil proceeding
before a judicial or administrative body of competent jurisdiction and as a
result of such proceeding is or was 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.

     As more fully described in Item 4 hereto, this statement on Schedule 13D
relates to the acquisition by WMUS, of 18,107,143 Partnership Shares of the
Company on December 31, 1995 pursuant to a Contribution Agreement dated 
December 31, 1995 (the "Contribution Agreement") by WMX, WMUS, the Company and
ServiceMaster Consumer Services Limited Partnership ("ServiceMaster Consumer
Services").
<PAGE>
 
     As consideration for the 18,107,143 Partnership Shares of the Company and
other rights with respect to the Company's Partnership Shares (including an
Option (as hereinafter defined) to acquire additional ServiceMaster Shares) as
discussed below, WMUS has contributed to the Company 308,078 limited partnership
shares in ServiceMaster Consumer Services (the "Consumer Shares").
Contemporaneously with the signing of the Contribution Agreement, WMX, WMUS, the
Company and other related entities have entered into (i) an Option Agreement,
(ii) a Relationship Agreement, and (iii) a Business Development Agreement, each
discussed in Item 4 below, and each as hereinafter defined.

ITEM 4.  PURPOSE OF TRANSACTION.

     The purpose of the transaction was to convert WMUS's ownership interest in
ServiceMaster Consumer Services (which represented approximately 28% of the
Consumer Shares, with the Company owning the remaining 72%) into a direct
interest in the Company, a public company the equity securities of which are
traded on the New York Stock Exchange, Inc. (the "NYSE").  WMUS presently
intends to hold the Partnership Shares and the Option for investment, subject to
the terms of the Relationship Agreement and the Option Agreement, and has no
current intention to increase or decrease its ownership interest in the Company
except to the extent of any exercise of the Option.

     Except as otherwise indicated herein, none of WMX, WMUS, or any person
named in Appendix A hereto, in his or her capacity as an officer or director of
WMX or WMUS, has any present plans or proposals with respect to the Company that
relate to or that could result in the occurrence of any of the events set forth
in paragraph (a) through (j) of Item 4 of Schedule 13D.

     Pursuant to the Contribution Agreement, (i) WMUS contributed the Consumer
Shares to the Company (totaling approximately 28% of the ownership interest in
ServiceMaster Consumer Services) and (ii) the Company issued (y) 18,107,143
Partnership Shares to WMUS (totaling approximately 19% of the issued and
outstanding Partnership Shares of the Company) and (z) an Option to WMUS subject
to the conditions specified in the Option Agreement, as discussed below.  As
noted above, contemporaneously with the signing of the Contribution Agreement,
WMX, WMUS the Company and other related entities entered in (i) an Option
Agreement, (ii) a Relationship Agreement and (iii) a Business Development
Agreement.  The discussion of the Option Agreement and Relationship Agreement is
qualified by reference to the respective agreement, and a copy of each such
agreement is attached hereto as an exhibit and incorporated herein by reference.

     Pursuant to an Option Agreement between WMUS and the Company (the "Option
Agreement") dated December 31, 1995, the Company issued an option (the "Option")
to WMUS to purchase 1,250,000 ServiceMaster Shares (subject to adjustment in
accordance with the terms of the Option Agreement) on the terms and subject to
the limitations specified in the Option Agreement.  The term of the Option is
January 1, 1996 to December 31, 2000 and may be exercised at any time, in whole
or in part, during the period from and including January 1, 1997, to and
including December 31, 2000.  In no event may the Option be exercised prior to
January 1, 1997.
<PAGE>
 
     The Option does not entitle WMUS to any voting rights or other rights as a
limited partner of the Company prior to the effective exercise of the Option and
payment of the Option exercise price (deemed to be $33.00 per ServiceMaster
Share, unless otherwise adjusted under the Option Agreement).  The Option is not
transferable by WMUS (except to an affiliate) without prior written consent of
the Company.  The terms of the Option Agreement provide that the Company may
request WMUS (or other holder of the Option) to exercise the Option if the
closing price of ServiceMaster Shares on the New York Stock Exchange (the
"NYSE") is greater than or equal to $39.00 per share, subject to adjustment,
continuously throughout a period of forty NYSE trading days commencing on or
after November 4, 1997 (the "Option Period").  If WMUS (or other holder of the
Option) does not exercise the Option within a specified period following the
receipt of the Company's exercise request, the Company will have the right to
purchase the Option at a price equal to the number of ServiceMaster Shares which
are then obtainable for purchase upon exercise of the Option multiplied by (i)
the average market price of the ServiceMaster Shares during the Option Period
over (ii) the Option exercise price.  The Option exercise price is subject to
certain adjustments resulting from any dividends or distributions on the
ServiceMaster Shares declared or issued by the Company.

     If WMX would beneficially own more than 21% of the ServiceMaster Shares
outstanding determined on a fully diluted basis in accordance with generally
accepted accounting principles after exercise of the Option, then to the extent
that such 21% figure is exceeded, the Company may at its election pay WMX in
cash for that number of ServiceMaster Shares which produces such excess over
21%.  The cash to be paid by the Company is equal to the value of the "spread"
on the amount of ServiceMaster Shares producing such excess over 21%.  The
"spread" is the amount determined by multiplying such number of excess shares by
the excess (if any) of (i) the average market price per share of the
ServiceMaster Shares during the 40 New York Stock Exchange trading days
immediately preceding the delivery of the Option exercise notice over (ii) the
then applicable Option exercise price.

     Pursuant to a Relationship Agreement between WMX, WMUS, the Company and
ServiceMaster Delaware (the "Relationship Agreement") dated December 31, 1995,
neither WMX nor any of its affiliates may acquire or offer to acquire, directly
or indirectly, (other than through exercise of the Option) beneficial ownership
of ServiceMaster Shares if after giving effect to the acquisition, WMX would
beneficially own more than approximately 21% of the ServiceMaster Shares then
outstanding or shares representing 21% of the votes which could be cast in any
election to any position on the Company Board.  As used hereafter, "Permitted
Number" of shares means 21% as applied to WMX and 15% as applied to anyone other
than WMX.  The Relationship Agreement also restricts the sale, transfer,
assignment, pledge, hypothecation or other direct or indirect disposition by WMX
and WMUS (other than a transfer by WMUS to WMX) of ServiceMaster Shares then
held by it or them, the ServiceMaster Shares underlying the Option and the
Option itself (collectively, the "WM Shares").  Under the Relationship
Agreement, WMX may transfer beneficial ownership of ServiceMaster Shares held by
it to any affiliate of WMX (including any person who acquires all or
substantially all of the business operated by WMX and its affiliates, such
person hereinafter referred to as a "WMX Successor") provided that (y) the
affiliate or WMX Successor agrees to be bound by all provisions in the
Relationship Agreement which apply to WMX and (z) no transfer to a WMX 
<PAGE>
 
Successor will be made if after the transfer WMX and the WMX Successor
collectively own more than the number of the ServiceMaster Shares which WMX
should have been entitled to beneficially own if the transfer had not taken
place.  WMX has also agreed to limit its market sales (other than pursuant to a
registration statement, to an affiliate, pursuant to a private placement, to
ServiceMaster or in the event of a ServiceMaster change in control) to 15% of
the average daily trading volume over the four weeks preceding the week of sale.
In no event may any WM Shares be transferred if WMX or any affiliate of WMX
knows that the purchaser would be an owner of 5% or more of the outstanding
ServiceMaster Shares after the transfer or is a person (a "Raider") who has
publicly announced an intention to accomplish a Takeover (as defined below) has
advised WMX that it is considering a Takeover, has been identified by the
Company as considering a Takeover or WMX knows is considering a Takeover.  The
Relationship Agreement also provides that WMX may not transfer ServiceMaster
Shares during any Arbitrage Period, as defined in the Agreement.  WMX has also
agreed to instruct any underwriters or other representatives engaged by it in
connection with a sale to observe similar restrictions on sales.

     WMX, on behalf of itself and its affiliates, has also agreed under the
Relationship Agreement not to (i) attempt to carry out any Takeover of the
Company (which would be deemed to occur if, among other things, any person
becomes the beneficial owner of more than the Permitted Number of ServiceMaster
Shares or engages in certain transactions resulting in a more than 21% change in
the Company's share ownership or a change in the chief executive officer of the
Company or any person not approved by a majority of the Company's Board acquires
a Board seat or any distribution of all or a substantial part of the Company's
assets shall be made (a "Takeover")), (ii) propose to the Company any
transaction between WMX or its affiliates and the Company which would
constitute, or which it is reasonably possible could lead to a Takeover, (iii)
endorse or propose that the Company accept any proposal from any other person
which could result in or lead to a Takeover or (iv) enter into discussions,
negotiations, arrangements or understandings with or advise, assist or
encourage, act in concert with, or otherwise support any person in connection
with any activities which it is reasonably possible could lead to a Takeover.
WMX is also obligated to inform the Company if any person approaches WMX
concerning a Takeover.

     In addition, WMX, on behalf of itself and its affiliates, has agreed (i) in
the event of a contest for any position on the Company's Board, to vote for the
candidate nominated by a majority of the incumbent members of the Company's
Board, (ii) not to vote in favor of any Takeover which is opposed by the
Company's Board, (iii) not to solicit proxies or consents, become a participant
in a solicitation of proxies or consents or work in concert with a third party's
solicitation of proxies or consents, except in support of solicitations made by
or on behalf of the Company's Board, or (iv) not to vote in favor of the removal
of any Company general partner (unless the general partner is guilty of gross
negligence) or director (unless the director is guilty of gross negligence).

     The Repurchase Agreement provides that one position on the Company's Board
will be filled by a person nominated by WMX, currently filled by Philip B.
Rooney, President and Chief Operating Officer of WMX.  The Company has agreed
that in connection with any election of 
<PAGE>
 
directors at which the term of WMX's representative is scheduled to expire or
the position is vacant, the Company will nominate for election a candidate
selected by WMX who is reasonably satisfactory to the Company's Board.  The
Company has also agreed to request that Company directors fill a vacancy created
by the resignation (or other reason) of a WMX representative with a person
nominated by WMX who is reasonably satisfactory to the Board.

     The Repurchase Agreement provides that WMX will offer the Company a "first
refusal right" such that the Company will have the opportunity to purchase the
WM Shares before WMX transfers the shares to another party, other than a WMX
affiliate.  The price at which the Company may purchase WM Shares will be the
market price per ServiceMaster Share on a specified date.

     From and after January 1, 1998, WMX shall be entitled to require the
Company to register under the Securities Act of 1933, as amended (i) the
18,107,143 Partnership Shares received by WMX under the Contribution Agreement,
(ii) the Partnership Shares underlying the Option, (iii) all ServiceMaster
Shares which WMX may acquire in compliance with the Relationship Agreement prior
to the first to occur of a sale of shares pursuant to a registration as required
by the Relationship Agreement or sales by WMX aggregating more than 2% of the
outstanding ServiceMaster Shares, (iv) other ServiceMaster Shares acquired by
WMX which the Company in its sole discretion shall agree to register and (v)
other shares issued in respect of ServiceMaster Shares.  The Relationship
Agreement also provides WMX with four demand registrations, subject to minimum
share amount requirements, and piggyback registration rights.

     The Relationship Agreement also provides the Company with the right to
purchase the ServiceMaster Shares and the Option in the event of a change in
control of WMX, as defined therein.

     The Repurchase Agreement will generally terminate on the first to occur of
(i) the first day after WMX ceases to own 1% or more of the outstanding
ServiceMaster Shares and shall not have been a 1% owner at any time during the
preceding 36 consecutive calendar months, (ii) the consummation of any change in
control of the Company or (iii) January 1, 2030.  During any time when WMX is a
5% or less shareholder, the Agreement's provisions concerning WMX's Board
representation, 21% limit on share ownership, not facilitating or engaging in a
Takeover, voting ServiceMaster Shares and transferring ServiceMaster Shares
(other than the right of first refusal described above) shall be suspended.  If
the Company incurs a change in control (as defined in the Agreement), the
Agreement generally terminates except as to WMX's registration and Board
representation rights.

     WMX and the Company have also entered into a Business Development Agreement
(the "Business Development Agreement") dated December 31, 1995.  Under the
Business Development Agreement, WMX will pay the Company $30 million over five
years (i) for the Company's promotion of WMX's waste management and other
services, and (ii) for access to the Company's customer base for marketing
efforts.  The Business Development Agreement also provides that WMX and the
Company will consider undertaking various joint and cross-marketing activities.
<PAGE>
 
ITEM 5.  INTEREST IN SECURITIES OF ISSUER.

     (a) WMX beneficially owns a total of 18,107,143 Partnership Shares,
representing approximately 19% of the total number of Partnership Shares
outstanding, as reflected in the Company's most recent filing on Form 10-Q.  In
addition, WMUS has the right to acquire additional Partnership Shares pursuant
to the Option granted under the Option Agreement described in Item 4.  The
Partnership Shares are subject to a right of first refusal in favor of the
Company pursuant to the Relationship Agreement described in Item 4.

     (b) WMUS has sole voting power and dispositive power over the 18,107,143
Partnership Shares.  WMUS's right to dispose of such shares is subject to the
right of first refusal in favor of the Company and certain transfer
restrictions, each as set forth in the Relationship Agreement described in 
Item 4.

     (c) Except for the acquisition of Partnership Shares described above in
Item 3, during the past 60 days, neither WMX nor WMUS, nor, to the best
knowledge or WMX or WMUS, no executive officer or director, has effected any
transaction in the Partnership Shares.

     (d) No person other than WMX has the right to receive or the power to
direct the receipt of dividends from, or the proceeds from the sale of, the
Partnership Shares beneficially owned by WMX.

     (e)  Not applicable.

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

     Except as provided in the Contribution Agreement, Option Agreement,
Relationship Agreement and Marketing Agreement, neither WMX nor WMUS has any
contracts, arrangements, understandings or relationship (legal or otherwise)
with respect to any securities of the Company, including but not limited to
transfer or voting of any securities of the Company, finder's fees, joint
ventures, loan or option arrangements, put or calls, guarantees of profits,
division of profits or loss, or the giving or withholding of proxies.

ITEM 7.  MATERIAL TO BE FILED AS EXHIBITS.

     1.   Joint Filing Agreement

     2.   Option Agreement, dated as of December 31, 1995 between WMI Urban
          Services, Inc., ServiceMaster Limited Partnership and Service 
          Master Incorporated of Delaware.

     3.   Relationship Agreement, dated as of December 31, 1995 between WMX
          Technologies, Inc., WMI Urban Services, Inc., ServiceMaster Limited
          Partnership and ServiceMaster Incorporated of Delaware.
<PAGE>
 
                                   Signature

     After reasonable inquiry and to the best of its knowledge and belief, WMX
Technologies, Inc. certifies that the information set forth in this statement is
true, complete and correct.

                                                 WMX Technologies, Inc.

 
 
                                                 By: /s/ Thomas A. Witt
                                                     Vice President
Dated: January 2, 1996
<PAGE>
 
                                   Signature

     After reasonable inquiry and to the best of its knowledge and belief, WMI
Urban Services, Inc. certifies that the information set forth in this statement
is true, complete and correct.

                                                 WMI Urban Services, Inc.

 
 
                                                 By: /s/ Dale B. Tauke
                                                     Authorized Representative
Dated: January 2, 1996
<PAGE>
 
                                   APPENDIX A

                        Executive Officers and Directors
                        --------------------------------


     The name and principal occupation or employment of each executive officer
and director of WMX are set forth below.  Except as otherwise noted below, the
business address of each such person is 3003 Butterfield Road, Oak Brook,
Illinois 60521.  Each such person is a citizen of the United States.

     Directors                           Principal Occupation
     ---------                           --------------------

          H. Jesse Arnelle                    Attorney

          Howard H. Baker, Jr.                Attorney

          Dr. Pastora San Juan Cafferty       Professor, University of
                                              Chicago School of Social
                                              Service Administration

          Dean L. Buntrock                    Chairman of the Board and
                                              Chief Executive Officer

          Jerry E. Dempsey                    Chairman and Chief
                                              Executive Officer
                                              PPG Industries, Inc.

          James B. Edwards                    President, Medical University
                                              of South Carolina

          Donald F. Flynn                     Chairman and President of
                                              Flynn Enterprises, Inc.

          Peter H. Huizenga                   President, Huizenga Capital
                                              Management

          Peer Pedersen                       Attorney

          James R. Peterson                   Retired

          Phillip B. Rooney                   President and Chief
                                              Operating Officer of WMX

          Alexander B. Trowbridge             President, Trowbridge
                                              Partners, Inc.
<PAGE>
 
     Executive Officers (who are not Directors)
     ------------------------------------------

          Herbert A. Getz                     Senior Vice President,
                                              Secretary and General
                                              Counsel of WMX

          Thomas C. Hau                       Vice President and Controller
                                              of WMX

          James E. Koenig                     Senior Vice President and
                                              Chief Financial Officer of
                                              WMX

          D. P. Payne                         Senior Vice President -
                                              Corporate and Public Affairs
                                              of WMX

          Donald A. Wallgren                  Vice President - Chief
                                              Environmental Officer
                                              of WMX


     The name and principal occupation or employment of each executive officer
and director of WMUS are set forth below.  Except as otherwise noted below, the
business address of each such person is 3003 Butterfield Road, Oak Brook,
Illinois 60521.  Each such person is a citizen of the United States.

                Name                               Principal Occupation
                ----                               --------------------

          Thomas C. Hau, Director                     See above

          James E. Koenig, Director and President     See above

          Stephen P. Stanczak, Director, Vice         Vice President - Legal
          President and Secretary                     Affairs - Waste Management
                                                      International plc

<PAGE>
 
                            Joint Filing Agreement
 
     The undersigned agree that the Statement on Schedule 13D to which this
Agreement is attached is filed on behalf of each one of them pursuant to Rule
13d-1(f)(iii).  This Agreement may be executed in any number of counterparts,
each of which shall be deemed to be an original and all of which shall together
constitute one instrument.

                                                 WMI Technologies, Inc..

 
                                                 By: /s/ Thomas A. Witt
                                                     Vice President



                                                 WMI Urban Services, Inc.

 
                                                 By: /s/ Dale B. Tauke
                                                     Authorized Representative

Dated: January 2, 1996
 


<PAGE>
 
 
                                OPTION AGREEMENT


     This Option Agreement is made as of this 31st day of December, 1995, among
WMI URBAN SERVICES, INC. ("WMUS"), SERVICEMASTER LIMITED PARTNERSHIP, a Delaware
limited partnership ("SMLP") and SERVICEMASTER INCORPORATED OF DELAWARE, a
Delaware corporation ("SMI").

     RECITALS:

          A.  WMUS presently owns 308,078 limited partner shares in
     ServiceMaster Consumer Services Limited Partnership, a Delaware limited
     partnership (the "WMUS Consumer Services Shares");

          B.  SMLP is a limited partnership whose limited partner shares are
     publicly traded on the New York Stock Exchange; and

          C.  Pursuant to a Contribution Agreement (the "Contribution
     Agreement") between SMLP, WMUS and WMX Technologies, Inc. ("WMX"), dated as
     of the date hereof, WMUS shall contribute the WMX Consumer Services Shares
     to SMLP in exchange for 18,107,143 limited partner shares of SMLP and the
     execution and delivery to WMUS by SMLP of this Option Agreement.

     NOW, THEREFORE, in consideration of the foregoing and the terms and
conditions set forth below, the parties agree as follows.

1.   THE OPTION

     1.1  Grant of Option.  In partial consideration for the contribution made
by WMUS of the WMUS Consumer Services Shares pursuant to the Contribution
Agreement, SMLP hereby issues to WMUS an option (the "Option") to acquire
1,250,000 shares (the "ServiceMaster Shares") of the limited partner interest in
SMLP (i.e., the equity security issued by SMLP which is listed on the New York
Stock Exchange on the date hereof on the terms and subject to the limitations
specified herein. Equity Securities of the type to be issued pursuant hereto are
referred to herein as the "ServiceMaster Shares."

     1.2  Exercise Price. The contribution to be made by WMUS or if WMUS is not
the holder of the Option at such time, the holder of the Option, to SMLP for the
acquisition of ServiceMaster Shares upon exercise of the Option shall be $33.00
per ServiceMaster Share, subject to the adjustment as provided in Section 5,
(the "Exercise Price").

     1.3  Term.  The term of the Option shall be the period January 1, 1996 to
December 31, 2000.  The Option may be exercised at any time, in whole or in
part, during the period (herein called

<PAGE>
 
the "Exercise Period") from and including January 1, 1997, to and including
December 31, 2000. In no event may the Option be exercised prior to January 1,
1997 or after December 31, 2000.

     1.4  Procedure for Exercising the Option.

     (a)  If WMUS contemplates exercising the Option (in whole or in part), WMUS
and SMLP shall proceed as follows:

          (i)   WMUS shall notify SMLP, in writing, that WMUS proposes to
     exercise the Option for the number of ServiceMaster Shares set forth in
     such notice subject to the satisfaction of the conditions set forth in this
     Section 1.4 (the "Preliminary Exercise Notice").

          (ii)  Within ten business days after the receipt of the Preliminary
     Exercise Notice, SMLP shall provide WMUS with: (1) a copy of SMLP's most
     recently filed Annual Report on Form 10-K, (2) copies of each Quarterly
     Report on Form 10-Q filed by SMLP since the date of item (1), (3) copies of
     each Report on Form 8-K filed by SMLP since the date of item (1), (4) a
     copy of SMLP's most recent annual report to shareholders (5) a copy of each
     quarterly statement to shareholders as sent since the date of such annual
     report and (6) a certificate of SMLP containing the representations set
     forth in paragraph (b) below (the "Review Materials").

          (iii) WMUS shall have five business days after the receipt of the
     Review Materials to review the Review Materials (the "Review Period").
     During the Review Period, representatives of SMLP shall remain reasonably
     available to respond to any  reasonable inquiries  WMUS may make with
     respect to the Review Materials or with respect to the business and
     condition of SMLP.  If WMUS fails to act prior to the end of the Review
     Period, WMUS shall have no liability and WMUS's rights with respect to the
     Option shall not be prejudiced in any way.

          (iv)  Prior to the close of the Review Period, WMUS shall notify SMLP,
     in writing, whether WMUS will proceed to exercise the Option in accordance
     with the Preliminary Exercise Notice (subject to satisfaction of the
     conditions to closing as set forth below) or whether WMUS has determined
     not to exercise the Option at this time (the "Final Exercise Notice").  If,
     in the Final Exercise Notice, WMUS elects to exercise the Option, the
     parties shall proceed to a closing of the transaction as provided in
     paragraphs (d) and (e) below.  If WMUS elects not to exercise the Option in
     accordance with the Preliminary Exercise Notice,  WMUS's rights with
     respect to the Option shall not be prejudiced in any way.

     (b)  The representations referred to in item (ii) of paragraph (a) shall be
the following:

                                       2
<PAGE>
 
          (i)   if the representations are made prior to the Reincorporating
     Merger (as defined in Section 4 hereof), SMLP is duly organized, validly
     existing and is in good standing as a limited partnership in the state of
     its organization; and if the representations are made after the
     Reincorporating Merger, SMI (as defined in Section 4 hereof), is duly
     organized, validly existing and is in good standing as a corporation in the
     state of its organization;

          (ii)  the issuance of the ServiceMaster Shares issuable in response to
     WMUS's exercise of the Option does not contravene: (A) any provision in
     SMLP's certificate of limited partnership or SMLP's agreement of limited
     partnership if SMLP is then a limited partnership or any provision in
     SMLP's certificate of incorporation or bylaws if SMLP is then a
     corporation; (B) any agreement to which SMLP is a party; or (C) any
     provision of any law or regulation;

          (iii) the ServiceMaster Shares issuable in response to WMUS's exercise
     of the Option will, upon issuance, have been duly authorized by SMLP's
     governing authority;

          (iv)  the ServiceMaster Shares as issued in response to WMUS's
     exercise of the Option will be free and clear of all liens, claims,
     encumbrances and restrictions (except for securities laws restrictions
     described in paragraph (c) below and the restrictions under the
     Relationship Agreement between WMX, WMUS, SMLP and SMI dated as of the date
     hereof, as amended from time to time, the "Relationship Agreement");

          (v)   Upon payment of the Exercise Price for the ServiceMaster Shares
     issued in response to WMUS's exercise of the Option, such ServiceMaster
     Shares will be fully paid and non-assessable;

          (vi)  The financial statements of SMLP which have been included in its
     Annual Report on Form 10-K and SMLP's Quarterly Reports on Form 10-Q
     delivered to WMUS in connection with the Preliminary Exercise Notice were
     prepared in accordance with generally accepted accounting principles
     applied on a consistent basis and present fairly the financial condition
     and results of operations of SMLP for the dates and as of the periods
     stated therein except that the financial statements included in SMLP's
     Quarterly Reports on Form 10-Q omit footnotes and condense information as
     permitted by the rules applicable to the preparation of 10-Q reports and
     are subject to adjustments to be made in the course of the preparation of
     SMLP's annual financial statements;

          (vii) SMLP is not aware of any fact or set of facts or trend or known
     uncertainty which has materially and adversely affected or may reasonably
     be

                                       3
<PAGE>
 
     expected to materially and adversely affect SMLP's business, financial
     condition or results of operations (whether actual or prospective) which
     are not disclosed in the Review Materials or by information either publicly
     disclosed by SMLP or otherwise communicated in writing by SMLP to a senior
     officer of WMX; and

          (viii) a statement of the capitalization of SMLP as at the date of the
     Preliminary Exercise Notice which shall include a listing of all options,
     warrants or other rights to acquire equity interests in SMLP which are then
     outstanding.

     (c) WMUS acknowledges that the ServiceMaster Shares to be issued by SMLP in
response to the Preliminary Exercise Notice and the Final Exercise Notice will
not be registered securities under state or federal securities laws and that the
certificate(s) representing such ServiceMaster Shares will have a legend to such
effect.  WMUS will deliver a certificate to SMLP at the Option Closing
(hereinafter defined) to the effect that WMUS is acquiring such ServiceMaster
Shares for investment and not with a view to the distribution or resale, except
in compliance with federal and state securities laws.

     (d)  If WMUS elects to exercise the Option as set forth above, the closing
of the transaction (the "Option Closing") shall occur within ten business days
after the Final Exercise Notice has been received by SMLP.

     (e)  At the Option Closing:

          (i)   as a condition to the obligation of WMUS to pay the Exercise
     Price for the ServiceMaster Shares for which the Option is being exercised,
     SMLP shall deliver to WMUS a letter or certificate which restates, as at
     the date of the Option Closing, the representations set forth in paragraph
     (b) above;

          (ii)  as a condition to the obligation of SMLP to deliver the
     certificate(s) for the ServiceMaster Shares to be purchased by WMUS, WMUS
     shall deliver to SMLP a letter or certificate which makes the investment
     representation set forth in paragraph (c) above; and

          (iii) upon satisfaction of the condition in clause (ii), SMLP shall
     deliver one or more certificates for the ServiceMaster Shares to be issued
     to WMUS and  upon satisfaction of the condition in clause (i), WMUS shall
     pay to SMLP the Exercise Price therefor by wire transfer of immediately
     available funds.

     (f)  If an Option Closing fails to occur within ten business days after the
Final Exercise Notice has been received by SMLP because of a failure of SMLP to
satisfy a condition precedent to WMUS's obligation to close and WMUS does not
waive such condition, then WMUS may elect

                                       4
<PAGE>
 
not to close, provided, however, that WMUS shall have no liability and WMUS's
rights with respect to the Option shall not be prejudiced in any way.

     (g)  Notwithstanding the foregoing provisions of this Section 1.4, if a
Final Exercise Notice is given and if, after giving effect to an issuance of
ServiceMaster Shares pursuant to such Final Exercise Notice, WMX would
beneficially own more than 21% of the ServiceMaster Shares outstanding
determined on a fully diluted basis in accordance with generally accepted
accounting principles, then to the extent that such 21% figure is exceeded,
ServiceMaster may, at its election, substitute the Cash Out Amount (defined
below) for that number of ServiceMaster Shares which produces such excess over
21% (the "Excess Shares"). Such election shall be made, if at all, by delivery
of a notice to WMUS by not later than the fifth business day after the Final
Exercise Notice has been received by SMLP. The Cash Out Amount shall be equal to
the value of the "spread" on the Excess Shares, i.e., the amount determined by
multiplying the number of Excess Shares by the excess (if any) of (i) the
average Market Price Per Share (as defined in Section 6.3(b) of the Relationship
Agreement) of the ServiceMaster Shares during the forty New York Stock Exchange
trading days period immediately preceding the final Exercise Notice over (ii)
the Exercise Price. Upon payment by SMLP of the Cash Out Amount, WMUS shall have
no further rights under this Option Agreement or pursuant to the Option with
respect to such Excess Shares. If SMLP makes the election described above, WMUS
shall not be required to pay the Exercise Price in respect of the Excess Shares.

     1.5  No Rights as a Limited Partner or Stockholder.  This Option does not
entitle WMUS to any voting rights or other rights as a limited partner of SMLP
prior to an effective exercise of the Option and the payment of the Exercise
Price in respect of the ServiceMaster Shares thereby acquired, all in accordance
herewith.

     1.6  Non-Transferable. Except to an Affiliate (as defined in Section 12.1
of the Relationship Agreement) of WMUS and subject to compliance with all of
the provisions of Section 5.2 of the Relationship Agreement, the Option or any
other rights of WMUS under this Option Agreement may not be transferred to any
person or entity without the prior written consent of SMLP.

     1.7  Authorized ServiceMaster Shares.  SMLP covenants that during the
period in which the Option is outstanding, SMLP shall at all times have a
sufficient number of  authorized but unissued limited partner shares to enable
it to issue limited partner shares upon each exercise of the Option.


2.   SMLP CALL RIGHT

     2.1  If at any time after the date hereof, the Market Price Per Share (as
defined in Section 6.3(b) of the Relationship Agreement) of the ServiceMaster
Shares is greater than or equal to $39.00

                                       5
<PAGE>
 
per share, subject to adjustment as provided in Section 4 hereof, (the "Call
Trigger Price") for forty consecutive, New York Stock Exchange trading days
commencing on or after November 4, 1997, SMLP may request WMUS or if WMUS is not
the holder of the Option at such time, the holder of the Option, to exercise the
Option in whole (the "Option Call Notice"), by giving notice to WMUS or such
holder, which notice shall also include the Review Materials under Section
1.4(a)(ii), at any time during the thirty calendar day period (the "Call
Period") which immediately follows such forty NYSE trading day period. If SMLP
fails to give the Option Call Notice prior to the expiration of such thirty
calendar day period, then SMLP shall have no further rights under this Section 2
and the Option shall remain in full force and effect.

     2.2  If SMLP delivers the Option Call Notice within the Call Period to
WMUS, WMUS (or such other holder) shall then have thirty calendar days from the
date of receipt by WMUS of the Option Call Notice to exercise the Option as
provided in Section 1.4.  If WMUS or such other holder does not exercise the
Option within such thirty-day period, SMLP shall within ten business days after
the expiration of such thirty-day period purchase the Option at a price (the
"Call Price") equal to the number of ServiceMaster Shares which are then
obtainable for acquisition upon exercise of the Option multiplied by excess of
the (i) the average Market Price Per Share of the ServiceMaster Shares during
the forty NYSE trading day period referred to in Section 2.1, over (ii) the
Exercise Price.  SMLP shall pay to WMUS or such other holder, the Call Price for
the Option by wire transfer of immediately available funds.  Upon the closing of
such sale and purchase of the Option, WMUS shall have no further rights under
this Option Agreement or with respect to the Option.


3.   LEGEND REQUIRED

          Each certificate representing ServiceMaster Shares obtainable upon
exercise of the Option shall bear the legends as required under Section 10 of
the Relationship Agreement which legends shall be removed as provided in Section
10 of the Relationship Agreement.


4.   ADJUSTMENT IN SHARES AND SHARE PRICES IN CERTAIN CASES

     4.1  Effect of Distributions in ServiceMaster Shares.   If any dividends or
distributions on the ServiceMaster Shares payable in ServiceMaster Shares are
declared or issued by ServiceMaster, the Exercise Price shall be adjusted by
multiplying the Exercise Price then in effect by a fraction, the numerator of
which is the number of ServiceMaster Shares outstanding immediately prior to
such dividend or distribution and the denominator of which is the number of
ServiceMaster Shares outstanding immediately after such dividend or
distribution.  Upon each such adjustment of the Exercise Price hereunder, the
number of ServiceMaster Shares acquirable upon exercise of this Option shall be
adjusted to the number of ServiceMaster Shares determined by multiplying the
Exercise Price in effect immediately prior to such adjustment by the number of

                                       6
<PAGE>
 
ServiceMaster Shares acquirable upon exercise of this Option immediately prior
to such adjustment and dividing the product thereof by the Exercise Price
resulting from such adjustment.

     4.2  Subdivision, Combination, Reclassification of ServiceMaster Shares.
Other than in connection with the Reincorporating Merger, if at any time after
the date hereof the ServiceMaster Shares shall, by subdivision, combination or
reclassification or through merger or consolidation or otherwise, change into a
different number or kind or class of ServiceMaster Shares, or into other
securities, cash or other property, then at the same time the equity interests
issuable under this Option Agreement immediately prior to such change shall be
changed into the securities, cash or other property which WMUS would have
received if WMUS had exercised the Option immediately prior to such subdivision,
combination, reclassification, merger or consolidation or other action (or any
record date applicable thereto), and SMLP shall reserve for issuance upon
exercise of the Option the same type of and amount of securities, cash or other
property which would have been received by WMUS if it had exercised the Option
immediately prior to such subdivision, combination, reclassification, merger or
consolidation or other action (or any record date applicable thereto). The
purpose of the foregoing provision is to entitle WMUS to receive such
securities, cash or property for the same capital contribution to SMLP as would
have occurred if WMUS had fully exercised the Option immediately prior to such
subdivision, combination, reclassification, merger or consolidation or other
action (or any record date applicable thereto).

     4.3  Conversion of SMLP to a Corporation. SMLP is presently organized as a
Delaware limited partnership.  However, SMLP expects to convert to a Delaware
corporation pursuant to a merger (the "Reincorporating Merger") into
ServiceMaster Incorporated of Delaware ("SMI") by not later than December 31,
1997 under a Merger and Reorganization Agreement which was approved by SMLP's
limited partners on January 13, 1992 (the "Reincorporating Merger Agreement").
SMLP and SMI hereby covenant and agree that from and after the effective date of
the Reincorporating Merger: (i) each and every obligation of SMLP which is set
forth in this Option Agreement shall become the obligation of SMI (ii)
"ServiceMaster Shares" shall mean shares of common stock issued or issuable by
SMI pursuant to the Reincorporating Merger. SMI, although not on the date hereof
an active company, has nonetheless executed this Option Agreement to record its
commitment to the foregoing provision.

     4.4  Substitution of Successor. If an entity other than SMLP or SMI shall
be the issuer of any securities to be held for the benefit of WMUS pursuant to
Section 4.1 or 4.2 above or 5 below, then such entity shall be deemed to be
bound by all the provisions of this Agreement applicable to SMLP or SMI in
respect of any WMUS exercise of the Option with respect to such securities. SMLP
and SMI shall continue to be bound if the Option shall also be exercisable for
ServiceMaster Shares or SMI Shares. This Section 4.4 shall apply to each entity
which shall issue any securities to be held for the benefit of WMUS pursuant to
Section 4.1 or 4.2 above or 5 below.

5.   EXTRAORDINARY DISTRIBUTIONS

                                       7
<PAGE>
 
     5.1  For purposes of this Agreement, an "Extraordinary Distribution" shall
be a distribution to shareholders by SMLP of cash, property, or rights the value
of which, when added to all other distributions to shareholders issued or paid
during the same calendar year on a per share basis, exceeds 130% of the
aggregate distributions to shareholders of cash, property or rights per share
issued or paid by SMLP for the immediately preceding calendar year.

     5.2  If on the date on which WMUS receives SMLP's Extraordinary
Distribution Notice (defined below) the Market Value Per Share (as defined in
Section 6.3(b) of the Relationship Agreement) is less than the Exercise Price,
SMLP shall reserve for issuance upon exercise of the Option, property or rights
which would have been received by WMUS if WMUS had exercised the Option
immediately prior to such Extraordinary Distribution (or immediately prior to
any record date applicable thereto), provided that if it is not reasonably
feasible for SMLP to preserve any property or rights for WMX, then SMLP may upon
WMUS' exercise of the Option pay the fair market value of such property or right
to WMUS in lieu of transferring such property or right to WMX. The purpose of
the foregoing provision is to entitle WMUS to receive the cash, property or
rights comprising the Extraordinary Distribution for the same capital
contribution to SMLP as would have occurred if WMUS had fully exercised the
Option immediately prior to the Extraordinary Distribution (or immediately prior
to any record date applicable thereto). Upon WMUS's exercise of the Option, the
cash, property or rights issued or paid in the Extraordinary Distribution shall
be issued or paid to WMUS together with the SMLP shares deliverable as a result
of such Option exercise.

     5.3  SMLP agrees that, within five calendar days after its Board of
Directors has determined to make a distribution which constitutes an
Extraordinary Distribution, SMLP will deliver a notice to WMUS which describes
such Extraordinary Distribution (the "Extraordinary Distribution Notice"). SMLP
agrees that the date which SMLP's board of directors establishes as the record
date for the Extraordinary Distribution shall not be earlier than the second
business day after the earliest day by which an exercise of the Option could be
closed pursuant to Section 1.4 if WMUS were to deliver a Preliminary Exercise
Notice on the fifth calendar day after the receipt of the Extraordinary
Distribution Notice. The foregoing sentence shall be based on the assumption
that each of SMLP and WMUS uses the maximum time allowed by Section 1.4 to take
action.

     5.4  If SMLP gives WMUS an Extraordinary Distribution Notice during the
year 1996, SMLP agrees to permit the Option to be exercised by WMUS
notwithstanding the provisions of Section 1.3 hereof.


6.   GENERAL PROVISIONS

     6.1  Amendments.  No amendment of any provision of this Option Agreement
shall be valid unless the same is in writing and signed by WMUS, ServiceMaster
and SMI.

                                       8
<PAGE>
 
     6.2  Waivers.  No waiver by any party of any default, misrepresentation or
breach of warranty or covenant shall be deemed to extend to any prior or
subsequent default, misrepresentation or breach of warranty or covenant.

     6.3  Binding Effect.  This Option Agreement shall be binding upon and shall
inure to the benefit of the parties hereto and their respective successors and
assigns.

     6.4  Notices.  Section 8.4 of the Relationship Agreement is incorporated
into this Section 6.4 by reference.

     6.5  Governing Law.  This Option Agreement shall be governed by and
construed in accordance with the laws of the State of Delaware.

     6.6  Construction.  The parties have participated jointly in the
negotiation and drafting of this Option Agreement.  In the event an ambiguity or
question of intent or interpretation arise, this Option Agreement shall be
construed as if drafted jointly by the parties and no presumption or burden of
proof shall arise which favors or disfavors either party by virtue of the
authorship of any of the provisions of this Option Agreement.
 

                     *                  *                *

                                       9
<PAGE>
 
     IN WITNESS WHEREOF, the parties have executed this Option Agreement the day
and year first above written.



WMI URBAN SERVICES, INC.


By: ______________________________
     Its



SERVICEMASTER LIMITED PARTNERSHIP

By:  ServiceMaster Management Corporation
          (general partner)


     By: _____________________________________
          Its



SERVICEMASTER INCORPORATED OF DELAWARE


By: _____________________________________
     Its
    
                                       10
<PAGE>
 
     Each party has executed this document at the place provided below in order
to evidence such party's agreement to be bound by all of its terms.



WMX TECHNOLOGIES, INC.

By: 
   ------------------------------
     Name:
          -----------------------
     Title:
           ----------------------



WMI URBAN SERVICES, INC.

By: 
   ------------------------------
     Name:
          -----------------------
     Title:
           ----------------------



SERVICEMASTER LIMITED PARTNERSHIP

By: ServiceMaster Management Corporation
      As Managing General Partner


      By: /s/ Ernest J. Mrozek
         ------------------------------
          Name:  Ernest J. Mrozek
               ------------------------
          Title: Sen. V.P. -- C.F.O.
                -----------------------

<PAGE>
 
     Each party has executed this document at the place provided below in order
to evidence such party's agreement to be bound by all of its terms.



WMX TECHNOLOGIES, INC.

By: /s/ James T. Koenig 
   ------------------------------
     Name: James T. Koenig 
          -----------------------
     Title:
           ----------------------



WMI URBAN SERVICES, INC.

By: /s/ Dale B. Tauke
   ------------------------------
     Name: Dale B. Tauke
          -----------------------
     Title:
           ----------------------



SERVICEMASTER LIMITED PARTNERSHIP

By: ServiceMaster Management Corporation
      As Managing General Partner


      By: 
         ------------------------------
          Name:  
               ------------------------
          Title: 
                -----------------------



<PAGE>
 
                             RELATIONSHIP AGREEMENT

     This Relationship Agreement has been made on December 31, 1995 (the "date
hereof") among: WMX Technologies, Inc ("WMX"); WMI Urban Services, Inc.
("WMUS");  ServiceMaster Limited Partnership (which, subject to change when and
if prescribed by Part 9, is herein called "ServiceMaster"); and ServiceMaster
Incorporated of Delaware ("ServiceMaster Incorporated").


                                   BACKGROUND

     A.  On the date hereof, ServiceMaster is a limited partnership whose
limited partner shares are publicly traded on the New York Stock Exchange.

     B.  Contemporaneous with the execution of this Agreement, WMX, WMUS and
ServiceMaster have entered into a Contribution Agreement pursuant to which among
other things (i) ServiceMaster has issued 18,107,143 ServiceMaster shares to
WMUS (which represent approximately 19% of all ServiceMaster shares outstanding
after giving effect to such issuance) and (ii) ServiceMaster has issued to WMUS
an option (the "WM Option") to acquire an additional 1,250,000 ServiceMaster
shares from ServiceMaster.  The WM Option is evidenced by an Option Agreement
(the "WM Option Agreement") among ServiceMaster, ServiceMaster Incorporated and
WMUS made contemporaneously with this Agreement.

     C.  The ServiceMaster shares and the WM Option have been granted by
ServiceMaster subject to, and in reliance upon, certain acquisition, voting and
transfer restrictions.  The parties have entered into this Agreement to
establish and confirm these restrictions and certain other agreements between
them.



                                   AGREEMENT

THE PARTIES HEREBY AGREE AS FOLLOWS:


1.   WMX BOARD REPRESENTATION.

     ServiceMaster and WMX declare it to be their objective that one position
(the "WMX position") on the ServiceMaster Board will be filled with a person
nominated by WMX ( "WMX's representative").  The parties acknowledge that from
the date of this agreement until he leaves the Board, Philip B. Rooney will
serve as WMX's representative on the ServiceMaster Board.

<PAGE>
 
ServiceMaster agrees that in connection with any election of directors at which
the term of WMX's representative on the Board is scheduled to expire or the WMX
position on the Board is vacant, ServiceMaster will (i) nominate for election to
the WMX position on the Board any candidate selected by WMX and reasonably
satisfactory to a majority of the Board and (ii) solicit proxies from its
shareholders in favor of such candidate in the same manner ServiceMaster
solicits proxies for other candidates for the Board nominated in the ordinary
course at ServiceMaster (it being understood that ServiceMaster does not expect
to solicit any proxies for Board elections until and unless ServiceMaster
coverts to corporate form).  ServiceMaster also agrees that in the event WMX's
representative shall resign from the Board or otherwise leave the Board for any
reason, ServiceMaster's chief executive officer will request that the remaining
directors fill the vacancy with a person who is nominated by WMX and who is
reasonably satisfactory to a majority of the Board. Each person appointed or
elected to the Board as contemplated by the two preceding sentences shall
constitute WMX's representative on the Board until such person leaves the Board.


2.   WMX STANDSTILL COMMITMENT.

     2.1  Basic Commitment.  Except as otherwise provided in Section 2.8,
neither WMX nor any of its affiliates shall acquire, or offer to acquire,
directly or indirectly, by purchase or otherwise, beneficial ownership of any
ServiceMaster shares if after giving effect to such acquisition WMX would
beneficially own more than the Permitted Number of ServiceMaster shares.

     2.2  Permitted Number.  Any particular person shall be deemed to
beneficially own more than the Permitted Number of ServiceMaster shares at any
particular time if that particular person shall beneficially own:

          (1)  more than the Applicable Percentage of the ServiceMaster 
               partnership shares outstanding at the particular time; or

          (2)  more than the Applicable Percentage of the shares of common stock
               issued by ServiceMaster Incorporated which are outstanding at the
               particular time; or

          (3)  more than the Applicable Percentage of the shares in any other 
               class or series of equity securities issued by ServiceMaster and
               outstanding at the particular time; or

          (4)  shares representing more than the Applicable Percentage of the 
               votes which could be cast in any election to any position on the
               ServiceMaster Board.

     2.3  Applicable Percentage.

                                       2
<PAGE>
 
     (a)  The Applicable Percentage as applied to anyone other than WMX shall 
          be 15%

     (b)  The Applicable Percentage as applied to WMX shall be 21%.

     2.4  Beneficial Ownership.

     (a)  Except as otherwise provided in Section 2.4(b) or Section 2.8, any
          particular person shall be deemed to "beneficially own" any
          ServiceMaster shares:

          (1)  which that particular person or any of that particular person's 
               affiliates owns directly or indirectly;

          (2)  which that particular person or any of that particular person's 
               affiliates has (A) the right to acquire (whether such right is
               exercisable immediately or only after the passage of time and/or
               the occurrence of a contingency) pursuant to any agreement,
               arrangement or understanding, or upon the exercise of conversion
               rights, exchange rights, warrants or options, or otherwise or (B)
               the right to vote whether pursuant to any agreement, arrangement
               or understanding or otherwise; or

          (3)  which are beneficially owned, directly or indirectly, by any 
               other person (or any affiliate thereof) with which that
               particular person (or any of that particular person's affiliates)
               has any agreement, arrangement or understanding relating to the
               acquisition, holding, voting or disposing of any ServiceMaster
               shares.

     (b)  WMX shall not be deemed to beneficially own any ServiceMaster shares
          (herein called "ERISA Shares") (i) in which the entire economic
          interest is owned by an ERISA Plan and (ii) which that ERISA Plan
          trustees or the employees who are beneficiaries of that Plan have the
          exclusive right to vote.

     (c)  The term "ERISA Plan" as used in this Agreement means:  any plan or 
          program (i) established for the benefit of employees or former
          employees of WMX or any of its affiliates and (ii) which is governed
          by the Employee Retirement Income Security Act of 1974 as amended
          ("ERISA").

     (d)  ServiceMaster has agreed to exclude ERISA Shares from the 
          requirements in this Agreement which apply to WM Shares and the WM
          Option in reliance upon indications received from officers of WMX that
          such exemption is for convenience to avoid the need to monitor
          acquisitions and dispositions of ServiceMaster shares

                                       3
<PAGE>
 
          by WMX's ERISA Plans which such officers expect to be modest in amount
          and routine in nature. WMX hereby covenants that WMX shall not use any
          ERISA Plan which is not subject to the ERISA diversification
          requirements to circumvent obligations which are imposed on WMX under
          this Agreement.

     2.5  Ownership Percentage.  The percentage of the shares in any series,
class or other relevant population which are beneficially owned by any
particular person at any particular time shall be calculated for purposes of
this agreement by dividing

          (1)  the number of shares in that series, class or other population 
               which are beneficially owned by that particular person at that 
               particular time

                                       by

          (2)  the sum of (i) the number of shares in that series, class or 
               other population which are actually outstanding at that
               particular time plus (ii) the number of shares in that series,
               class or other population which are beneficially owned by that
               particular person at that particular time but which are not
               actually outstanding at that particular time.

     2.6  ServiceMaster share.  The term "ServiceMaster share" as applied at any
particular time for purposes of this Agreement designates and includes any of
the following which shall be outstanding at that particular time:

          (1)  a partnership share issued by ServiceMaster Limited Partnership 
               (i.e., the equity security issued by ServiceMaster Limited
               Partnership which is traded on the New York Stock Exchange on the
               date hereof); and

          (2)  a share of common stock issued or issuable by ServiceMaster 
               Incorporated; and

          (3)  a share (or other basic unit) of any other equity security at 
               any time issued or issuable by ServiceMaster Limited Partnership,
               ServiceMaster Incorporated or any other partnership, corporation
               or entity which shall succeed to the position of "ServiceMaster"
               for purposes of this Agreement pursuant to Section 9.2.

     2.7  WM Shares.  The term "WM Shares" as applied at any particular time for
purposes of this agreement means all ServiceMaster shares

                                       4
<PAGE>
 
          (1)  in which WMX, WMUS or any other affiliate of WMX holds any 
               ownership interest at the particular time or

          (2)  which WMX,  WMUS or any other affiliate of WMX has the right to
               acquire (whether such right is exercisable immediately or only
               after the passage of time and/or the occurrence of a contingency)
               pursuant to any agreement, arrangement or understanding, or upon
               the exercise of conversion rights, exchange rights, warrants or
               options, or otherwise.

The term "WM Shares" as applied on the date hereof includes the ServiceMaster
shares cited in Background Paragraph B and the ServiceMaster shares issuable
upon exercise of the WM Option. No ERISA shares shall be deemed to be WM Shares
for purposes of this Agreement.

     2.8  WM Option.  For purposes of applying the commitment made in Section
2.1 WMX shall not be deemed to beneficially own any shares which are subject to
the WM Option until and unless such shares are actually issued.  No exercise of
the WM Option shall be deemed to violate Section 2.1 regardless of whether WMX
shall beneficially own more than the Permitted Number of ServiceMaster shares
after such exercise.  Nothing in this Agreement shall prevent or limit the right
of WMX to exercise the WM Option to the extent WMX is permitted to do so under
the terms of the Option Agreement pursuant to which the WM Option was granted.


3.   TAKEOVER COMMITMENTS.

     3.1  Basic Commitments.  Unless specifically authorized in advance in
writing by the Board,  neither WMX nor any of its affiliates shall directly or
indirectly:

     (a)  attempt or carry out any Takeover;

     (b)  propose to ServiceMaster or any other Person any transaction between 
          WMX and ServiceMaster, any of its affiliates and/or its security
          holders or involving any of its securities or security holders which
          would constitute a Takeover or which (based on information known to
          WMX) it is reasonably possible could lead to a Takeover,

     (c)  endorse or propose that ServiceMaster accept any proposal from any 
          other person which would result in a Takeover or which (based on
          information known to WMX) it is reasonably possible could lead to a
          Takeover, or

     (d)  enter into any discussions, negotiations, arrangements or 
          understandings with or advise, assist, encourage, act in concert with,
          or otherwise support in any manner any other Person in connection with
          any activities which it is reasonably possible could

                                       5
<PAGE>
 
          lead to a Takeover except that this clause (d) shall not be deemed to
          prohibit any sale of WMX shares otherwise permitted by this Agreement.

     3.2  Takeover.

     (a)  Except as otherwise provided in this Section 3.2, a "Takeover" shall 
          be deemed to have occurred if and when:

          (1)  any person shall become the beneficial owner of more than the 
               Permitted Number of ServiceMaster shares, or

          (2)  ServiceMaster or any of its affiliates shall sell or purchase 
               assets, engage in a merger or engage in any other transaction
               immediately after which more than 21% of ServiceMaster's
               outstanding shares or ServiceMaster shares representing 21% or
               more of the combined voting power of the then outstanding
               ServiceMaster shares shall be ultimately owned by person(s) who
               shall not have owned such shares prior to such transaction or who
               shall be a party to such transaction or an affiliate of a party
               to such transaction; or

          (3)  any other merger, sale of assets or sale of securities shall 
               occur in connection with which the person who shall have served
               as chief executive officer of ServiceMaster prior to the time of
               the initiation of the actions which shall have led to such
               transaction shall cease to be the chief executive officer of
               ServiceMaster; or

          (4)  any position on ServiceMaster's Board of Directors shall become 
               occupied by a person who shall not have been nominated or
               appointed by a majority of the members of ServiceMaster's Board
               of Directors prior to such occupation; or

          (5)  any distribution shall be made to ServiceMaster's shareholders 
               of all or a substantial part of ServiceMaster's net assets or
               ServiceMaster shall be dissolved.

     (b)  If there shall be a merger in which the entity which shall have 
          constituted "ServiceMaster" prior to such merger shall cease to exist,
          then the test prescribed in clause (2) in Section 3.2(a) shall be
          applied by comparing the ownership of the securities issued by the
          entity which shall have constituted "ServiceMaster" prior to such
          merger with the ownership immediately after such merger of the
          securities of the entity into which ServiceMaster shall have merged or
          which shall be the ultimate parent of such entity.

                                       6
<PAGE>
 
4.   VOTING COMMITMENTS.

     4.1  WMX Voting Shares.  The term "WMX Voting Shares" as applied as of any
particular time shall mean (i) all WM Shares which are outstanding at the
particular time and (ii) all other ServiceMaster shares which WMX or any of its
affiliates has the power to vote at the particular time.  ERISA Shares shall not
be deemed to be Voting Shares for purposes of this Agreement.

     4.2  Election Contest.  In the event there shall be a contest for any
position on the ServiceMaster Board, then all WMX Voting Shares shall be voted
for the candidate for that position nominated by a majority of the incumbent
members of the ServiceMaster Board.

     4.3  Takeover Vote.  None of the WMX Voting Shares shall be voted in favor
of any Takeover which is not approved by the ServiceMaster Board.

     4.4  No Proxy Solicitation.  With respect to any ServiceMaster shares,
with regard to any matter, neither WMX nor any WMX affiliate shall directly or
indirectly:  (i) solicit proxies or consents, (ii) become a "participant" in a
"solicitation" (as such terms are defined in Regulation 14A of the Exchange Act)
of proxies or consents or (iii) work in concert with, facilitate, support or
assist in any manner a third party in such third party's solicitation of proxies
or consents, except in support of solicitations made by or on behalf of the
Board.

     4.5  Removal.

     (a)  General Partner.  None of the WMX Voting Shares shall be voted in 
          favor of the removal of any ServiceMaster general partner unless that
          general partner shall be guilty of Gross Misconduct (as defined in the
          following paragraph).

     (b)  Director.  None of the WMX Voting Shares shall be voted in favor of 
          the removal of any ServiceMaster director unless the director shall be
          guilty of Gross Misconduct. A person shall not be guilty of Gross
          Misconduct for purposes of this Agreement unless either (i) such
          person shall be convicted of a criminal felony which harmed
          ServiceMaster or (ii) such person has engaged in other wrongdoing
          which a majority of the incumbent members of the ServiceMaster Board
          determine warrants removal of such person from the Board.


5.   TRANSFER COMMITMENTS.

     5.1  Transfers to Affiliates.

                                       7
<PAGE>
 
     (a)  Provisions Applicable to WMUS.  WMUS shall have the right to Transfer
          any of the WM Shares or the WM Option at any time to (i) WMX or (ii)
          to any affiliate of WMX provided that such transfer to an affiliate
          complies with the requirements of Section 5.1(b). WMX and WMUS warrant
          to ServiceMaster that WMX has majority ownership and control of WMUS
          (as defined in Section 5.1(b)).

     (b)  Transfers to Other WMX Affiliates.  Neither  any WMX Share nor the WM
          Option shall be transferred to any affiliate of WMX unless the
          following conditions are met before such transfer becomes effective:
          (i) WMX shall directly or indirectly hold a majority of the ownership
          interest in such affiliate and have control over such affiliate
          sufficient to cause such affiliate to abide by all requirements of
          this Agreement (herein called "majority ownership and control") and
          (ii) WMX shall cause such affiliate to execute and deliver to
          ServiceMaster a counterpart of this Agreement and thereby agree to be
          bound by all provisions in this Agreement which apply to WMX. Any WMX
          affiliate which shall acquire any interest in the WM Option and/or in
          any ServiceMaster shares (i) shall be deemed by doing so to have
          agreed to be bound by all provisions in this Agreement which apply to
          WMX and shall in fact be bound by all such provisions and (ii) shall
          be entitled to the benefits provided by this Agreement with respect to
          the shares acquired. WMX shall not sell or otherwise give up majority
          ownership or control over any affiliate unless prior thereto such
          affiliate shall not own or control any ServiceMaster shares or the WM
          Option.

     (c)  Transfer to WMX Successor.  WMX shall have the right to Transfer the 
          WM Shares and the WM Option as part of the disposition of all or
          substantially all of the businesses and assets of WMX and its
          subsidiaries provided that the corporation or other organization which
          shall acquire the WM Shares and the WM Option and its ultimate parent
          if any (which are together called the "WMX Successor") shall agree to
          be bound by this Agreement to the same extent that WMX is bound by
          this Agreement by executing an agreement reasonably satisfactory to
          ServiceMaster. Even if such an explicit agreement shall not be
          obtained, the WMX Successor shall be deemed to have agreed to be bound
          by all provisions in this Agreement applicable to WMX by the act of
          acquiring the WM Shares and/or the WM Option. The WMX Successor shall
          also acquire all of WMX's rights arising under this Agreement and the
          WM Option.

     (d)  WM Option.  The WM Option shall not be Transferred to any person other
          than WMX or an affiliate over which WMX has majority ownership and
          control or to a WMX Successor. Neither any provision in this Agreement
          authorizing Transfer of

                                       8

<PAGE>
 
          WM Shares nor any other provision shall be deemed to authorize
          Transfer of any interest in the WM Option which is not authorized by
          the preceding sentence.

     5.2  Market Sale Restrictions.

     (a)  Basic Requirement.  WMX will limit its market sales of ServiceMaster 
          Shares on any particular day to 15% of the average daily trading
          volume in ServiceMaster shares in the principal market where the
          ServiceMaster shares shall then be traded during the four calendar
          weeks ending on the Friday preceding that particular day.

     (b)  Market Sale.  Any Transfer of ServiceMaster shares shall be deemed a
          "market sale" if it shall occur on the New York Stock Exchange or in
          another public market provided that none of the following shall be
          deemed "market sales":

          (1)  sales pursuant to a demand or piggyback registration under Part 
               7, or

          (2)  sales  pursuant to Section 5.1, 5.5 or 6.8 of this Agreement, or

          (3)  sales made by means of private placement, or

          (4)  sales to ServiceMaster.

     5.3  Prohibition Against Sales to 5% Owners or Raiders.

     (a)  In no event shall any WM Shares be Transferred to any person if WMX 
          or any WMX affiliate knows that the ultimate purchaser of the shares
          would be either (i) a 5% owner after giving effect to the purchase and
          any other purchases which the ultimate purchaser then intends to make
          or (ii) a Raider.

     (b)  WMX shall (i) advise the principal  underwriter, broker or other
          representative retained by WMX or any of its affiliates in connection
          with the particular Transfer of the requirement in the preceding
          clause (a), (ii) prohibit sale of ServiceMaster shares representing
          more than 5% of all ServiceMaster shares from being sold to any single
          purchaser and (iii) instruct WMX's principal underwriter, broker or
          other representative to use reasonable efforts to avoid making any
          sale of shares for which any underwriter, broker or other
          representative responsible for the sale knows the ultimate purchaser
          would be either (i) a 5% owner after giving effect to the purchase and
          any other purchases which the underwriter, broker or other
          representative knows the ultimate purchaser then intends to make or
          (ii) a Raider.

                                       9
<PAGE>
 
          (c)  For purposes of this agreement a person shall be deemed to be a 
               "5% owner" if such person beneficially owns ServiceMaster shares
               representing 5% or more of (i) the shares outstanding in any
               class or series or (ii) the votes which could be cast in any
               election to any position on the ServiceMaster Board.

          (d)  Whenever it is used in this Agreement the term "Raider" means 
               any person who (i) has made a public announcement that it is
               considering accomplishing or precipitating a Takeover, (ii) has
               advised WMX it is considering accomplishing or precipitating a
               Takeover, or (iii) has been identified in writing by
               ServiceMaster to WMX in good faith as a person who is considering
               accomplishing or precipitating a Takeover, or (iv) WMX knows is
               considering accomplishing or precipitating a Takeover.

          (e)  Any fact or development known to any underwriter, broker or other
               representative shall not be deemed known by WMX unless it shall
               have been communicated to WMX by such underwriter, broker or
               other representative or it shall otherwise actually be known to
               WMX.

          5.4  Restriction During Any Arbitrage Period.

          (a)  Basic Commitment.  WMX shall not during any Arbitrage Period 
               either Transfer any WM Shares or enter into any agreement
               obligating WMX to Transfer any WM Shares

               (1)  except as may be permitted by Section 5.1 or Section 5.5 and

               (2)  except that WMX may Transfer WM Shares during any Arbitrage
                    Period to the extent WMX is required to do so (i) by any
                    agreement made by WMX at a time which did not fall within an
                    Arbitrage Period and which otherwise complies with the
                    requirements of this Agreement or (ii) by the terms of any
                    sale made by WMX outside of any Arbitrage Period and which
                    otherwise complies with the requirements of this Agreement
                    and for which the settlement day falls within the Arbitrage
                    Period.

          (b)  Arbitrage Period.

               (1)  Except as otherwise provided in this subsection (b), an  
                    "Arbitrage Period" shall begin on a date identified as the
                    beginning of an Arbitrage Period in a notice from
                    ServiceMaster to WMX (provided that if the date specified is
                    earlier than the actual delivery of such notice to WMX, then
                    the period shall begin on the date of such actual delivery).

                                       10
<PAGE>
 
          (2)  Except as otherwise provided in this subsection (b), an
               "Arbitrage Period" shall end on a date identified as the end of
               that Arbitrage Period in a notice from ServiceMaster to WMX.

          (3)  ServiceMaster shall not initiate an Arbitrage Period unless it 
               reasonably concludes in good faith that there is Significant
               Arbitrage Risk. For purposes of this Agreement, Significant
               Arbitrage Risk shall be deemed to exist when the filing of a 13D
               Statement or any other development has occurred that creates a
               reasonable concern that if WMX were to sell the number of shares
               it desires to sell at that time a significant component of the
               activity in ServiceMaster shares during the period such sales
               could occur could be attributable to purchases by persons (herein
               called "arbitrageurs") based on speculation that a Takeover could
               occur or by any Raider or by persons working in concert with a
               Raider or any such arbitrageurs.

          (4)  If WMX shall so request, ServiceMaster shall request its 
               principal investment banker to provide at ServiceMaster's expense
               an opinion as to whether Significant Arbitrage Risk exists
               (utilizing such format as such banker shall deem customary or
               appropriate for its advice concerning such subject matter). If
               within seven business days after actual delivery of WMX's request
               to ServiceMaster, ServiceMaster does not actually deliver to WMX
               such an opinion from ServiceMaster's investment banker that a
               Significant Arbitrage Risk then exists, the Arbitrage Period
               shall end on that seventh business day.

          (5)  In no event shall ServiceMaster have the right to classify more 
               than 180 days in any consecutive 720 day period as part of an
               Arbitrage Period. Any Arbitrage Period otherwise imposed by this
               Agreement shall end whenever necessary to comply with the
               requirement in the preceding sentence.

     5.5  Approved Takeover.  In the event the ServiceMaster Board shall approve
any Takeover offer or proposal, nothing in this Part 5 or in this Agreement
shall prevent WMX from selling any WM Shares to the person making such offer or
proposal pursuant to the terms of such offer or proposal so approved by the
ServiceMaster Board.

     5.6  Securities Law Compliance.  WMX acknowledges that its position on the
ServiceMaster Board and/or its rights to obtain information under the New
Relationship Agreements will from time to time mean that WMX has information
(herein called "Inside Information") which has not been publicly disclosed and
which under requirements imposed under the federal securities laws (the "federal
insider information requirements") must be disclosed before WMX can sell or
dispose of ServiceMaster shares.  WMX agrees that all its Transfers of
ServiceMaster shares will be made in compliance with the federal inside
information requirements. Except as otherwise

                                       11
<PAGE>
 
provided in Section 7.6, nothing in this Agreement shall be deemed to obligate
ServiceMaster to disclose Inside Information earlier than ServiceMaster
otherwise deems appropriate.  Nothing in this Agreement shall be deemed to
authorize WMX to disclose any Inside Information without ServiceMaster's
consent.  WMX shall comply with the Securities Laws in connection with each
Transfer of WM Shares. In addition, in connection with any Transfer of WM Shares
other than pursuant to a registration statement under the Securities Act of
1933, WMX shall as a precondition to such Transfer provide ServiceMaster with
(i) such evidence as ServiceMaster shall reasonably request that such Transfer
will not violate any applicable Securities Laws and (ii) if requested by
ServiceMaster in writing a warranty by WMX that such Transfer will not violate
any requirements of this Agreement imposed on WMX.


6.   SERVICEMASTER'S FIRST REFUSAL RIGHT

     6.1  Basic Commitment.  Before making any Transfer of any of WM shares, WMX
shall afford ServiceMaster the opportunity to purchase those shares in
accordance with the terms of this Part 6.

     6.2  First Refusal Notice.

     (a)  Before making any disposition of any WM Shares, WMX shall actually 
          deliver to ServiceMaster a notice (a "First Refusal Notice")
          specifying the number of WM Shares of which WMX intends to dispose
          (herein called the "Available Shares") within the Free Disposition
          Period (determined as specified in Section 6.6) and any 2% owner then
          known to WMX to which WMX intends to seek to sell any of the Available
          Shares. The date upon which WMX's First Refusal Notice shall actually
          be delivered to ServiceMaster is herein called the "First Refusal
          Notice Date" for that Notice. WMX shall limit the number of shares
          specified in any First Refusal Notice to the number of shares which
          WMX in good faith contemplates Transferring during the Free
          Disposition Period which may arise under Section 6.6 by reason of such
          Notice.

     (b)  WMX will also promptly provide ServiceMaster with such other 
          information which ServiceMaster shall reasonably request concerning
          the proposed Transfer which is known or reasonably available to WMX.
          ServiceMaster shall reimburse WMX for all expenses which WMX may
          reasonably incur to provide information requested by ServiceMaster
          pursuant to the preceding sentence. In no event shall any delay or
          failure by WMX in providing information requested by ServiceMaster
          under this paragraph (b) have the effect of delaying the onset of the
          time at which WMX shall be entitled to sell the Available Shares or
          excusing ServiceMaster from any obligation imposed on it hereunder.

                                       12
<PAGE>
 
     (c)  For purposes of this agreement a person shall be deemed to be a "2% 
          owner" if such person beneficially owns ServiceMaster shares
          representing 2% or more of (i) the shares outstanding in any class or
          series or (ii) the votes which could be cast in any election to any
          position on the ServiceMaster Board.

     6.3  ServiceMaster's Purchase Right.

     (a)  ServiceMaster shall have the right (the "First Refusal Right") to 
          purchase any WM Share which WMX desires to Transfer. ServiceMaster
          shall pay a purchase price (the "First Refusal Price") for each share
          purchased by ServiceMaster upon exercise of its First Refusal Right in
          the amount of the Market Price per Share for ServiceMaster shares on
          the business day preceding the First Refusal Notice Date.

     (b)  The term "Market Price Per Share" on any particular day means the 
          closing price per share for ServiceMaster shares on that day on the
          New York Stock Exchange provided that (i) if the New York Stock
          Exchange shall not then represent the principal market in which
          ServiceMaster shares are traded, the closing price shall be taken from
          that principal market and (ii) if the principal market shall not be
          open on that particular day, the Market Price Per Share on that
          particular day shall be the closing market price per share in that
          principal market on the first day preceding the particular day on
          which that principal market shall have been open.

     6.4  Review Period.

     (a)  ServiceMaster shall be entitled to utilize a Review Period after 
          receipt of any First Refusal Notice within which to determine whether
          or not to exercise the First Refusal Right arising with respect to the
          shares covered by that Notice. The Review Period shall begin on the
          First Refusal Notice Date and shall end upon the earliest of the end
          of the Available Review Interval, the date on which ServiceMaster
          notifies WMX that ServiceMaster has elected not to exercise that
          particular First Refusal Right, or the date upon which ServiceMaster
          notifies WMX that ServiceMaster has elected to exercise that
          particular First Refusal Right.

     (b)  The "Available Review Interval" available after actual delivery of any
          particular First Refusal Notice to ServiceMaster shall be a period
          beginning on the First Refusal Notice Date for that particular Notice
          (the "relevant First Refusal Notice Date") and ending on whichever of
          the following dates applies:

          (1)  The Available Review Interval shall end on the second full 
               business day which shall occur after the relevant First Refusal
               Notice Date if the sum of

                                       13
<PAGE>
 
               the amount ServiceMaster shall have committed during the 100 days
               immediately preceding the First Refusal Notice Date to pay to
               purchase ServiceMaster shares from WMX plus the amount which
               ServiceMaster would be required to pay to purchase all Available
               Shares covered by the triggering First Refusal Notice would not
               exceed $2 million.

          (2)  The Available Review Interval shall end on the fourth full 
               business day which shall occur after the relevant First Refusal
               Notice Date if the preceding test (1) does not apply and if
               ServiceMaster's purchase of all the Available Shares specified in
               the triggering First Refusal Notice would not exceed the $5
               Million Limit. For purposes of this Agreement, any particular
               purchase of Available shares shall be deemed to exceed the "$5
               Million Limit" if $5 million shall be less than the sum of (i)
               the amount ServiceMaster would be required to pay to purchase all
               of the Available Shares covered by the triggering First Refusal
               Notice plus (ii) the amount ServiceMaster shall have committed
               during the 100 days immediately preceding the First Refusal
               Notice Date to pay to purchase ServiceMaster shares from WMX.

          (3)  The Available Review Interval shall end on the 20th full 
               business day which shall occur after the relevant First Refusal
               Notice Date if ServiceMaster's purchase of all the Available
               Shares specified in the triggering First Refusal Notice would
               exceed the $5 Million Limit.

     (c)  WMX shall not enter into any agreement obligating it to Transfer any 
          Available Shares prior to the earlier of (i) the end of the Review
          Period or (ii) the sixth business day following the First Refusal
          Notice Date provided that any such agreement made during any portion
          of the Review Period which occurs on or after the sixth business day
          following the First Refusal Notice Date shall be subject to
          cancellation to the extent necessary to accommodate exercise of
          ServiceMaster's rights under this Part 6.

     6.5  ServiceMaster Exercise Of the First Refusal Right.

     (a)  ServiceMaster shall be deemed to have exercised any particular First
          Refusal Right which may become available to ServiceMaster under this
          Part 6 if prior to the end of the Review Period associated with that
          particular Right, ServiceMaster shall actually deliver to WMX a notice
          (herein called an "Exercise Notice") (i) stating that ServiceMaster
          has elected to exercise its First Refusal Right, (ii) stating the
          number of the Available Shares which ServiceMaster has elected to
          purchase (provided that ServiceMaster shall be obligated to purchase
          all Available Shares if any are purchased if such purchase would not
          exceed the $5 Million Limit) and (iii)

                                       14
<PAGE>
 
          specifying the closing date for the sale (which without the consent of
          WMX shall not be less than three business days after the date on such
          which notice shall be so delivered (the "Exercise Date") nor more than
          a number of days after the Exercise Date equal in length (beginning on
          the Exercise Date) to the length of the Available Review Interval
          relating to that particular First Refusal Right). Upon exercise of its
          First Refusal Right, ServiceMaster shall become contractually
          obligated to purchase the Available Shares with respect to which the
          Right is exercised on the terms prescribed in this Agreement and WMX
          shall become contractually obligated to sell those Shares to
          ServiceMaster on the terms prescribed by this Agreement.

     (b)  On the closing date so established:

          (1)  ServiceMaster shall make payment to WMX in immediately available 
               funds of the purchase price for the shares being purchased by
               ServiceMaster by reason of such exercise of its First Refusal
               Right and

          (2)  WMX shall deliver to ServiceMaster a certificate or certificates
               representing the shares being purchased by ServiceMaster bearing
               endorsements and/or accompanied by instruments sufficient to
               convey to ServiceMaster effective as of the closing date
               ownership of those shares free from any adverse interest.

     (c)  ServiceMaster shall also be entitled to receive any distribution, 
          dividend or other right associated with the shares purchased, the
          record date for which shall have occurred on or after the Exercise
          Date.

     6.6  WMX Sale of Free Shares.

     (a)  Identification of Free Shares.  Except as otherwise provided in 
          Section 6.6(c):

          (1)  If ServiceMaster shall deliver a notice to WMX specifying that
               ServiceMaster has elected not to exercise its First Refusal Right
               arising in connection with any particular First Refusal Notice
               provided by WMX or if ServiceMaster shall fail to deliver an
               Exercise Notice within the Available Review Interval after
               receipt of that First Refusal Notice, then all Available Shares
               identified in that Notice shall become Free Shares at the end of
               the relevant Review Period.

          (2)  If during the applicable Review Period, ServiceMaster shall 
               deliver an Exercise Notice to WMX specifying that ServiceMaster
               has exercised its right to purchase some but less than all the
               Available Shares specified in any

                                       15
<PAGE>
 
          particular First Refusal Notice, then the Available Shares in excess
          of those which ServiceMaster has elected to purchase in accordance
          with this Agreement shall upon delivery of that Exercise Notice become
          Free Shares. ServiceMaster in such a case shall have the right to
          specify the purchaser or purchasers proposed by WMX which
          ServiceMaster intends to replace by exercise of its First Refusal
          Right, and if ServiceMaster does so, the shares purchased by
          ServiceMaster shall be eliminated from the allocation of shares which
          would otherwise have been made to the purchaser(s) for which
          ServiceMaster is substituting itself.

     (b)  Disposition of Free Shares.  During the period (the "Free Disposition
          Period") of 100 days following the end of the Review Period applicable
          to any First Refusal Notice, WMX shall be entitled to sell or dispose
          of any Free Shares covered by that Notice in any manner which is not
          prohibited by any provision in this Agreement outside of this Part 6,
          provided that if the disposition shall be made by means of a
          registration under the Securities Act of 1933, the Free Disposition
          Period shall begin when the registration statement shall become
          effective and shall end 100 days later.

     (c)  Reversion Shares.  In the event WMX shall not consummate the sale or 
          other disposition of any Free Shares during the Free Disposition
          Period, then at the end of the Free Disposition Period, such shares
          shall cease to be Free Shares and WMX shall be required to comply with
          the requirements of this Part 6 again with respect to such shares in
          the event WMX desires to make any subsequent disposition of those
          shares.

     6.7  Exemption for Transfers to WMX affiliates.

     (a)  ServiceMaster's Right of First Refusal shall not apply to any transfer
          WMX shall make to any of its affiliates, provided that each of WMX's
          affiliates must comply with the provisions of this Part 6 before
          disposing of any ServiceMaster shares to any person who is not a WMX
          affiliate.

     (b)  The dispositions by WMX, all WMX affiliates, and all WMX Buyers shall 
          be aggregated for purposes of Section 6.4(b). The term "WMX" as
          applied in Sections 6.1 and 6.4(b) shall be applied to mean WMX, all
          WMX affiliates, and all WMX Buyers.

                                       16
<PAGE>
 
     6.8  Control Change Call.

     (a)  Basic Call Right.

          (1)  In the event any WMX Control Change shall occur, then 
               ServiceMaster shall have the option (the "Control Change Call")
               to purchase on the terms prescribed in this Section 6.8 both the
               WM Option and the WM Shares. A partial exercises of the Control
               Change Call is not permitted.

          (2)  For purposes of this Agreement a "WMX Control Change" shall be 
               deemed to have occurred if any development shall occur with
               respect to WMX which would constitute a Control Change under the
               standards prescribed in Section 11.3 (applying Section 11.3 as if
               it referred to WMX rather than ServiceMaster).

          (3)  The "Change Date" shall be the date upon which the WMX Control 
               Change shall occur.

     (b)  Call Price.

          (1)  Call Shares.  The purchase price for each of the Call Shares 
               shall be the Market Value Per Share on the Change Date (the "Call
               Price").

          (2)  WM Option.  The purchase price for the WM Option shall be 
               determined by multiplying the number of shares subject to the WM
               Option on the Change Date times the amount by which the Call
               Price shall exceed the exercise price per share of the WM Option
               on the Change Date, provided that in the event the Call Price
               does not exceed the exercise price per share of the WM Option,
               then the purchase price for the WM Option shall be determined by
               applying the Black Scholes option pricing model to value the
               remaining term of the option.

     (c)  Call Exercise Period.  WMX shall give ServiceMaster written notice 
          that a WMX Control Change has occurred promptly after such occurrence.
          ServiceMaster shall have the right to exercise its Control Change Call
          at any time during the period (the "Call Exercise Period") beginning
          on the Change Date and ending on the 30th business day after actual
          delivery to ServiceMaster of the WMX notice contemplated by the
          preceding sentence.

                                       17
<PAGE>
 
     (d)  Exercise.  ServiceMaster shall be deemed to have exercised the Control
          Change Call if and when during the Call Exercise Period ServiceMaster
          shall actually deliver notice of such exercise to WMX.

     (e)  Closing.  If ServiceMaster exercises its Control Change Call, 
          ServiceMaster shall have 90 business days after the Call Exercise
          Period in which to close the transaction. The closing shall occur on
          the date set forth in a notice from ServiceMaster to WMX, provided
          that such date shall not be later than the 90th business day after the
          end of the Call Exercise Period. At the closing:

               (A)  ServiceMaster shall pay WMX the purchase price for the Call
                    Shares and the WM Option in immediately available funds.

               (B)  WMX shall deliver to ServiceMaster the certificates 
                    representing the Call Shares plus such transfer instruments
                    as shall be sufficient to convey the Call Shares and the WM
                    Option to ServiceMaster free of any adverse interest of any
                    kind.

     (f)  Expiration.  The Control Change Call shall expire and shall not be
          exercisable unless ServiceMaster shall actually deliver to WMX prior
          to the end of the Call Exercise Period the notice prescribed by
          Section 6.8(d). If the Closing Call Right shall ever expire
          unexercised, then the Closing Call Right may never be exercised
          thereafter regardless of whether or not any subsequent WMX Control
          Change shall occur.

     6.9  Stock Split Adjustment.  If during any period operative under this
Part 6 there shall occur any stock split or other occurrence which would be
effective to cause an adjustment under part 4 of the WM Option Agreement, then
the nature and number of shares and the prices applicable under this part 6
shall be adjusted in accordance with the concepts underlying part 4 of the WM
Option Agreement.

 
7.   COMMITMENT TO REGISTER SERVICEMASTER SHARES.

     7.1  Demand Registration Right.

     (a)  Basic Right.  From and after January 1, 1998 and subject to the 
          provisions of this Part 7, WMX shall be entitled to require
          ServiceMaster to register under the Securities Act and state
          securities laws in accordance with the provisions of this Part 7
          Original Shares beneficially owned by WMX.

                                       18
<PAGE>
 
     (b)  Demand Registration.  The term "demand registration" means any
          registration to which WMX shall be entitled under this Part 7 which is
          not a Piggyback Registration (as defined in Section 7.8).

     (c)  Original Shares.  The term "Original Shares" as used in this Part 7 is
          limited to the following shares: (i) the 18,107,143 ServiceMaster
          Shares received by WMX on the date hereof under the Contribution
          Agreement between ServiceMaster and WMX; (ii) all shares which shall
          be issued upon exercise of the WM Option; (iii) all ServiceMaster
          shares which shall be acquired by WMX in compliance with this
          Agreement prior to the first to occur of a sale of shares pursuant to
          a registration under this Part 7 or sales by WMX after the date hereof
          aggregating more than 2% of the outstanding ServiceMaster shares; (iv)
          other ServiceMaster shares acquired by WMX which ServiceMaster in its
          sole discretion shall agree in writing to count as Original Shares for
          purposes of this Agreement; and (v) all shares which may be issued
          with respect to any Original Shares in the Reincorporating Merger or
          in any other merger or reorganization or in connection with any stock
          split or stock dividend or in any distribution of equity securities to
          the holders of Original Shares or in connection with any other action
          having a similar substantive effect. Although the remainder of this
          Part 7 refers generally to "ServiceMaster shares" in no event shall
          such provisions be deemed to obligate ServiceMaster to register any
          shares which are not Original Shares.

     7.2  Registration Request.  ServiceMaster shall not be required to initiate
a registration under this Part 7 unless ServiceMaster shall have received a
written request from WMX:

     (a)  affirming that WMX desires to sell Original shares to the public;

     (b)  affirming that in the opinion of their counsel, the proposed sale 
          would require registration of Original shares to be sold under the
          Securities Act and/or qualification of such Original shares under any
          applicable state securities or blue sky laws in any jurisdiction in
          which the WMX desires to make such sale;

     (c)  requesting that ServiceMaster undertake a registration of Original 
          shares under this Section 7.2;

     (d)  identifying the number of Original shares to be included in such
          registration (provided, that WMX may later increase or decrease such
          number to the extent not prohibited by this Agreement or the
          Securities Laws); and

     (e)  describing the method by which WMX proposes to sell such Original 
          shares (provided, that WMX may later change such method).

                                       19
<PAGE>
 
In the event WMX proposes to sell such Original shares pursuant to an
underwritten offering or through an exclusive broker or brokers, ServiceMaster
shall have the right to select one of the managing underwriters (the managing
underwriter that shall "run the books") for such offering or such exclusive
broker(s), provided that such managing underwriter or exclusive broker(s) shall
be reasonably acceptable to WMX and that, if managing underwriters are used, WMX
shall have the right to select the other managing underwriter (provided that
such managing underwriter shall be reasonably acceptable to ServiceMaster).

     7.3  Registration.  ServiceMaster shall use reasonable efforts to promptly
register under the Securities Act and any applicable state securities or blue
sky laws all Original Shares which it shall have been requested to register in a
request received in compliance with the requirements specified in Section 7.2
above plus such number of additional Original Shares as WMX may request,
provided that: (i) WMX shall not have the right to change the number of shares
registered after the registration statement becomes effective: (ii)
ServiceMaster shall not be obligated to begin work on the registration until
after the Review Period arising under part 6 in connection with the registration
request; and (iii) if ServiceMaster shall exercise its Refusal Right with
respect to all shares covered by such request, then (A) ServiceMaster shall not
be obligated to undertake that registration and (B) WMX shall be deemed to have
used up one of the demand registrations to which it is entitled under this
Agreement. The registration shall be on such available form as ServiceMaster
chooses, including, if available, Form S-3 or such other form as may have
replaced it under the Securities Act. ServiceMaster may (but shall not be
required to) include in such registration any ServiceMaster Shares, any other
owner(s) of which shall request inclusion, provided, that if ServiceMaster does
so the registration shall be deemed not to have been requested by WMX and WMX
shall have the right to make another request under Section 7.2 and such
registration shall be deemed to convert to a "piggyback" registration pursuant
to Section 7.8.  All ServiceMaster Shares which ServiceMaster shall be required
or elect to include in a registration (whether made as contemplated in this
Section 7.3, as contemplated in Section 7.8 or otherwise) are herein called the
"Registered Shares" for that registration.

     7.4  Registration Expenses.  ServiceMaster shall bear the following costs
and expenses of any demand registration ServiceMaster shall be required to make
under this Part 7:

     (a)  the fees and disbursements of outside attorneys representing 
          ServiceMaster,

     (b)  the fees and disbursements of ServiceMaster's independent public
          accountants,

     (c)  the fees and disbursements of any other Person retained by 
          ServiceMaster; and

                                       20
<PAGE>
 
     (d)  all internal costs and expenses of ServiceMaster (including, without
          limitation, all salaries and expenses of its officers and employees 
          performing legal or accounting duties).

All other expenses of any such demand registration and offering shall be borne
by WMX including, without limitation, all registration and filing fees
(including all expenses incident to filing with the National Association of
Securities Dealers, Inc.) relating to WMX's Registered Shares, all fees and
expenses for listing WMX's Registered Shares on each securities exchange on
which ServiceMaster Shares are then listed or on the NASD automated quotation
system, fees for and expenses of complying with state securities and blue sky
laws, printing expenses, fees and disbursements of WMX's attorneys and any other
Persons retained by WMX, and underwriting commissions attributable to WMX's
Registered Shares.

     7.5  Demand Registration Limits.

     (a)  Limitation on Number of Demand Registrations.  ServiceMaster shall not
          be obligated to make more than four successful demand registrations of
          Original Shares under or by reason of this Part 7.

     (b)  Minimum Share Requirement.  Each demand registration request made by 
          WMX under this Part 7 shall be for not less than 5 million shares nor
          more than 10 million shares, except that WMX shall be entitled to
          include all of its WM Shares in the last demand registration to which
          it is entitled even if less than 5 million shares. The limitations
          prescribed in this paragraph (a) shall be appropriately adjusted for
          stock splits, stock dividends and other occurrences having analogous
          substantive effect.

     (c)  Successful Registration.  Any demand registration made in response to
          a request for registration by WMX shall count as a successful
          registration except that a registration shall not be deemed successful
          unless at least ninety percent (90%) of the Original Shares which
          remain registered during the entire period such registration shall be
          effective and which are offered for sale in good faith pursuant to the
          appropriate registration statement shall be sold during the period for
          which the registration statement shall be effective. If WMX elects not
          to go forward with a demand registration, the registration shall
          nevertheless be deemed "successful" if either (i) it shall have become
          effective before the withdrawal decision by WMX or (ii) WMX does not
          reimburse the Parent Company for all expenses incurred and paid by the
          ServiceMaster to third parties other than employees in connection with
          the registration within fifty (50) days after the ServiceMaster shall
          deliver to WMX an itemized invoice of such expenses.

                                       21
<PAGE>
 
     7.6  Materially Disruptive Disclosures.  ServiceMaster shall not be
required to file and cause to become effective any registration requested by WMX
pursuant to this Part 7 if, in ServiceMaster's reasonable judgment, the
registration and offering process, including any disclosures required in or
pursuant to such registration, may be materially disruptive of or detrimental to
ServiceMaster's business or the business of any ServiceMaster affiliate or to
any pending or prospective transaction including, but not limited to, a
financing, acquisition or merger or other corporate reorganization to which
ServiceMaster or any of its affiliates is or may become a party. ServiceMaster
shall send a written notice to WMX as promptly as practicable after
ServiceMaster has knowledge of facts or circumstances that ServiceMaster
reasonably believes would cause the registration and offering process to be
materially disruptive of or detrimental to ServiceMaster's business or any
pending or prospective transaction.  Such notice shall state that ServiceMaster
is declining to file the registration because of the reason stated in the first
sentence of this Section. After giving such notice, ServiceMaster shall use
reasonable efforts and proceed in good faith to resolve as quickly as reasonably
practicable the issue that causes the registration and offering process to be
materially disruptive of or detrimental to the business of ServiceMaster and/or
any of its affiliates or a pending or prospective transaction.  In any event,
ServiceMaster shall not decline to file and cause to become effective any
particular registration requested by WMX pursuant to this Section 7.6 for any
such reason for one or more periods together aggregating in excess of thirty
(30) days.  Such period or periods shall be computed beginning on the day that
ServiceMaster gives written notice to WMX that ServiceMaster is relying on such
reason and ending on the day that WMX receives written notice that ServiceMaster
is no longer relying on such reason; provided, however, that in no event shall
such period or periods exceed thirty (30) days.
 
     7.7  120 Day Gap.  If ServiceMaster shall give WMX a notice of the
intention of ServiceMaster to register any ServiceMaster Shares, then so long as
ServiceMaster shall pursue such registration in good faith, WMX shall not be
entitled to require ServiceMaster to file a demand registration statement under
this Part 7 during the period beginning when such notice shall be given and
ending 120 days after the effective date of such registration.

     7.8  Piggyback Registration.  If ServiceMaster makes any Piggyback
Registration of ServiceMaster Shares under the Securities Act, WMX shall be
entitled to include its Original Shares in such registration and to sell
ServiceMaster Shares so included to the extent permitted by this Part 7. The
foregoing piggyback registration right is subject to the following terms and
conditions:

     (a)  Piggyback Registration.  The term "Piggyback Registration" means a
          registration by ServiceMaster under the Securities Act other than (i)
          a registration made in connection with a merger, purchase of assets or
          other similar transaction by ServiceMaster (other than an offering of
          securities for cash); (ii) a registration of ServiceMaster Shares at
          least 80% of which are offered to employees or partners of
          ServiceMaster or of any of its affiliates under any compensation
          arrangement, including a ServiceMaster Share option plan or a
          ServiceMaster Share purchase plan;

                                       22
<PAGE>
 
          (iii) a registration in which the majority of the proceeds will be
          derived from the sale of debt securities whether or not convertible
          into ServiceMaster Shares (and for this purpose consideration for a
          security representing a right to acquire ServiceMaster Shares shall be
          deemed to have been paid for such security rather than for those
          ServiceMaster Shares); (iv) a registration on a form which does not
          permit the inclusion of ServiceMaster Shares; and (v) a registration
          undertaken at the demand of WMX pursuant to Section 7.2.

     (b)  Primary Shares.  The term "Primary Share" when used with respect to 
          any Piggyback Registration means (i) all ServiceMaster Shares which
          ServiceMaster desires to sell in such registration and (ii) all
          ServiceMaster Shares to be included in such registration pursuant to
          any agreements made by ServiceMaster with the approval of one or more
          of its General Partners or by its Board of Directors (as the case may
          be) which entitles the holders of such ServiceMaster Shares to require
          ServiceMaster to file a registration statement with respect to such
          ServiceMaster Shares.

     (c)  Primary Seller.  The term "Primary Seller" when applied with respect 
          to any Piggyback Registration means ServiceMaster, provided that if
          the Piggyback Registration shall be undertaken by reason of other
          rights granted by ServiceMaster with the approval of one or more
          General Partners thereof or by its Board of Directors (as the case may
          be) entitling any holder of ServiceMaster Shares to require such
          registration, then such holder shall be deemed a "Primary Seller" for
          purposes of such registration.

     (d)  Registration Notice.  If ServiceMaster proposes to make a Piggyback
          Registration, ServiceMaster shall promptly give written notice (herein
          called an "Piggyback Registration Notice") to WMX stating that
          ServiceMaster intends to effect such registration and specifying a
          date (herein called the "Participation Deadline") by which WMX's
          election to participate ("Participation Election") in the Piggyback
          Registration must be submitted to ServiceMaster (which date shall not
          be less than thirty (30) days after ServiceMaster gives the Piggyback
          Registration Notice). The Piggyback Registration Notice shall be given
          by ServiceMaster at least thirty (30) days prior to the filing of the
          registration statement with the Securities and Exchange Commission.
          WMX shall, subject to the conditions and terms set forth in this
          Section 7.8, have the right to require ServiceMaster to include in the
          proposed Piggyback Registration any or all of its ServiceMaster
          Shares. If WMX desires to have any or all of its Original Shares
          included in the proposed Piggyback Registration, WMX shall promptly
          give ServiceMaster its Participation Election specifying in writing
          the number of Original Shares which WMX desires to have included in
          such registration, and WMX shall have the right to decrease such
          number at any time. WMX shall also have the right to increase such
          number of

                                       23
<PAGE>
 
          ServiceMaster Shares which WMX desires to have registered at any time,
          provided that (i) if WMX and ServiceMaster are the only two Persons
          whose ServiceMaster Shares are included in the registration, then the
          maximum number of Original Shares that shall be included in the
          registration shall be determined in accordance with the rationing
          provisions of sub-paragraph (f) and (ii) if ServiceMaster Shares owned
          by other Persons are included in such registration, Original Shares
          that are in excess of the number of Original Shares specified in the
          Participation Election shall be included in the registration only if
          it is unnecessary to apply the rationing provisions of sub-paragraph
          (f). The term "Secondary Shares" when applied with respect to any
          Piggyback Registration means (i) all Original Shares which WMX shall
          request in its Participation Election to be included in a proposed
          Piggyback Registration prior to the Participation Deadline or such
          later date on which ServiceMaster in its sole discretion shall elect
          to accept such request and (ii) all other ServiceMaster Shares the
          owners of which shall be entitled to include in such registration
          pursuant to rights granted by ServiceMaster with the consent of its
          general partner or general partners or its board of directors (as the
          case may be) on essentially the same terms granted to WMX in this sub-
          paragraph (d), and (iii) all shares which are proposed to be sold by
          ServiceMaster officers and directors. The term "Secondary Sellers"
          when applied with respect to any Piggyback Registration means the
          owners of the Secondary Shares involved in such registration.

     (e)  Distribution Arrangement.  All decisions and actions with respect to a
          Piggyback Registration shall be entirely in the discretion of the
          Primary Seller, including but not limited to whether and when the
          offering is to be made pursuant to the registration; the selling price
          of the securities; the selection of the underwriters (provided that
          WMX shall be entitled to be consulted in this regard); arrangements
          with the underwriters and any changes in such arrangements; the
          postponement or withdrawal of any such offering; and the contents of
          the registration statement and the prospectus. If the Primary Seller
          shall make arrangements to sell such Seller's ServiceMaster Shares
          included in a Piggyback Registration to or through professional
          investment bankers, then such investment bankers shall be deemed the
          "Primary Underwriter" for such registration and WMX shall not be
          entitled to include any ServiceMaster Shares in such registration
          unless (i) WMX shall agree to sell such ServiceMaster Shares under
          arrangements essentially similar to the arrangements for the sale of
          the Primary Seller's ServiceMaster Shares or such other arrangements
          as shall be satisfactory to WMX and the Primary Seller and (ii) WMX
          shall supply all information, execute all underwriting agreements and
          other documents, and take all other actions which shall be reasonably
          required under the arrangements specified in clause (i), provided that
          WMX shall not be required to pay any expenses except as provided in
          sub-paragraph (g). WMX shall not be entitled to include a class of
          ServiceMaster Shares in a registration which is not being sold by

                                       24
<PAGE>
 
          the Primary Seller if the Primary Underwriter concludes that inclusion
          of ServiceMaster Shares from a class not being sold by the Primary
          Seller would materially complicate or could materially delay the
          distribution (unless other Secondary Sellers are being allowed to
          include ServiceMaster Shares of such class).

     (f)  Rationing. If the Primary Underwriter determines in good faith that
          inclusion of all of the Secondary Shares which the Secondary Sellers
          desire to include in a Piggyback Registration would create a
          significant risk that either the quantity of securities that the
          Primary Seller could otherwise sell or that the price per Share of
          such securities to be received by the Primary Seller would be reduced,
          then (i) the Secondary Sellers shall be entitled to include in such
          registration the largest number of Secondary Shares which the Primary
          Underwriter determines will not create such a risk (herein called the
          "Piggyback Total"), (ii) the maximum number of Secondary Shares which
          any given Secondary Seller shall be entitled to include in the
          registration shall be determined by multiplying the Piggyback Total
          times a fraction the numerator of which is the number of Secondary
          Shares which such Secondary Seller desires to include in such
          registration and which are not excluded by any of the preceding
          provisions of this Section 7.8 and the denominator of which is the
          number of Secondary Shares which all Secondary Sellers desire to
          include in such registration and which are not excluded pursuant to
          any of the preceding provisions of this Section 7.8. Notwithstanding
          the foregoing sentence, WMX shall be entitled to include in the
          registration a minimum number of ServiceMaster Shares equal to 20% of
          the sum of the Piggyback Total plus the number of Primary Shares.

     (g)  Expenses.  WMX shall not be responsible for any expenses of any
          registration required pursuant to this Section 7.8, except that WMX
          shall pay underwriting commissions attributable to its Secondary
          Shares included in such registration and fees and disbursements of
          counsel or any other adviser that it may retain.

     (h)  Withdrawal Right.  ServiceMaster and any other Primary Seller shall 
          have the right in their sole discretion to abandon any registration or
          offering proposed pursuant to this Section 7.8 at any time before such
          offering is consummated and shall not have any liability to WMX by
          reason of any such abandonment. ServiceMaster shall give WMX written
          notice of its intention to abandon the proposed registration and
          offering and WMX may, upon notice to ServiceMaster given within five
          (5) days after the receipt of such notice from ServiceMaster, elect to
          cause the registration or offering to proceed as to any or all
          Original Shares as if such registration or offering were pursuant to
          Section 7.2 hereof, except that the expenses to be borne by WMX with
          respect to such registration or offering shall be only those relating
          to the period following WMX's giving such notice. WMX may in its sole
          discretion withdraw any or all Original Shares from any registration
          or offering proposed pursuant to this

                                       25
<PAGE>
 
          Section 7.8 at any time before such offering is consummated and WMX
          shall not have any liability to ServiceMaster by reason of such
          abandonment.

     7.9  Reasonable Efforts Regarding Registration.  Whenever under the
preceding provisions of this Part 7 ServiceMaster is required to register any
Original Shares, ServiceMaster shall, subject to the withdrawal right provisions
of sub-paragraph (h) of Section 7.8, use reasonable efforts to do the following
in connection with such registration of Original Shares pursuant to the
Securities Act and the underwritten public offering and sale of Original Shares:

     (a)  prepare and file with the SEC a registration statement with respect to
          ServiceMaster Shares to be registered and use its reasonable efforts
          to cause such registration statement to become effective including,
          without limitation, responding to SEC staff comments in such manner as
          ServiceMaster deems reasonable;

     (b)  prepare and file with the SEC such amendments and supplements to such
          registration statement and the prospectus used in connection therewith
          as may be necessary to keep such registration statement effective for
          such period, not to exceed 90 days, as WMX shall request, and to
          comply with the provisions of the Securities Act with respect to the
          sale of all ServiceMaster Shares covered by such registration
          statement during such period;

     (c)  provide WMX a reasonable opportunity to review and, in the case of
          registrations effected pursuant to Section 7.3 hereof, approve prior
          to filing, any such registration statement;

     (d)  furnish to WMX such number of conformed copies of such registration
          statement and of each such amendment and supplement thereto (in each
          case including all exhibits), such number of copies of the prospectus
          included in such registration statement (including each preliminary
          prospectus and prospectus supplement), in conformity with the
          requirements of the Securities Act, and such other documents as WMX
          may reasonably request in order to facilitate the sale of
          ServiceMaster Shares covered by such registration statement;

     (e)  use its reasonable efforts to register or qualify ServiceMaster Shares
          covered by such registration statement under such other securities or
          blue sky laws of such jurisdictions as WMX shall reasonably request,
          and do any and all other acts and things which may be reasonably
          necessary or advisable to enable WMX to consummate the sale in such
          jurisdictions of such Shares; provided, that ServiceMaster shall not
          for any such purpose be required to qualify generally to do business
          as a foreign corporation in any jurisdiction wherein it would not but
          for the requirements of this clause (e) be obligated to be so
          qualified, to subject itself to

                                       26
<PAGE>
 
          taxation in any such jurisdiction or to consent to general service of
          process in any such jurisdiction;

     (f)  use its reasonable efforts to cause all Original Shares covered by 
          such registration statement to be listed on each securities exchange
          on which ServiceMaster Shares of the same class issued by
          ServiceMaster are then listed or, if there shall then be no such
          listing, to be accepted for quotation on NASDAQ;

     (g)  provide a transfer agent and registrar for ServiceMaster Shares 
          covered by such registration statement not later than the effective
          date of such registration statement;

     (h)  enter into such agreements (including an underwriting agreement in
          customary form) and take such other actions as WMX reasonably requests
          in order to expedite or facilitate the disposition of such Original
          Shares; and

     (i)  obtain a "cold comfort" letter from ServiceMaster's independent public
          accountants in customary form and covering such matters of the type
          customarily covered by "cold comfort" letters as WMX shall reasonably
          request.

     7.10  WMX Support.  WMX shall furnish to ServiceMaster in writing such
information regarding WMX and the distribution of Original Shares as
ServiceMaster may reasonably request in writing in connection with any
registration, qualification or compliance referred to in this Part 7, together
with such representations and warranties as ServiceMaster may reasonably request
and shall take such other actions as ServiceMaster shall reasonably request in
connection with such registration (provided that such requests are not
inconsistent with the relative rights and obligations of the parties prescribed
in this Agreement or more onerous than requests made of other Secondary Sellers
which are similarly situated).

     7.11  Indemnification.

     (a)  ServiceMaster shall indemnify and hold harmless (i) WMX and, (ii) if 
          WMX so requests, each underwriter of Original Shares registered under
          this Part 7 and (iii) the officers and directors of WMX and such
          underwriters and (iv) each Person, if any, who controls any thereof
          within the meaning of Section 15 of the Securities Act and their
          respective successors against all claims, losses, damages and
          liabilities (or actions in respect thereof) arising out of or based on
          any untrue statement (or alleged untrue statement) of a material fact
          contained in any prospectus, prospectus supplement, offering circular
          or other document incident to any registration or qualification (or in
          any related registration statement, amendment thereto or notification)
          or any omission (or alleged omission) to state therein a material fact
          required to be stated therein or necessary to make the statements
          therein not

                                       27
<PAGE>
 
          misleading, or any violation by ServiceMaster of the Securities Act or
          any rule or regulation promulgated under the Securities Act applicable
          to ServiceMaster and relating to action or inaction required of
          ServiceMaster in connection with any such registration or
          qualification, and (except as otherwise provided in Section 7.12(b)
          below) shall reimburse WMX and each such underwriter for any legal and
          any other expenses reasonably incurred in connection with
          investigating or defending any such claim, loss, damage, liability or
          action; provided, however, that ServiceMaster shall not be liable in
          any such case to the extent that any such claim, loss, damage or
          liability arises out of or is based on any untrue statement or
          omission based upon written information furnished to ServiceMaster by
          an instrument duly executed by WMX or any underwriter and stated to be
          specifically for use therein.

     (b)  WMX shall indemnify and hold harmless ServiceMaster and its partners
          or shareholders, officers and directors and each person, if any, who
          controls any thereof within the meaning of Section 15 of the
          Securities Act and their respective successors against all claims,
          losses, damages and liabilities (or actions in respect thereof)
          arising out of or based on any untrue statement (or alleged untrue
          statement) of a material fact contained in any prospectus, prospectus
          supplement, offering circular or other document incident to any
          registration or qualification (or in any related registration
          statement, amendment thereto or notification) or any omission (or
          alleged omission) to state therein a material fact required to be
          stated therein or necessary to make the statements therein not
          misleading, or any violation by ServiceMaster of the Securities Act or
          any rule or regulation promulgated under the Securities Act applicable
          to ServiceMaster and relating to action or inaction required of
          ServiceMaster in connection with any such registration or
          qualification, and (except as otherwise provided in Section 7.12(a)
          above) shall reimburse ServiceMaster and each other person indemnified
          pursuant to this Section 7.12(b) for any legal and any other expenses
          reasonably incurred in connection with investigating or defending any
          such claim, loss, damage, liability or action; provided, however, that
          this Section 7.12(b) shall apply only if (and only to the extent that)
          such statement or omission was made in reliance upon information
          furnished to ServiceMaster by an instrument duly executed by WMX and
          stated to be specifically for use in such prospectus, offering
          circular or other document (or related registration statement or
          notification) or any amendment or supplement thereto and not corrected
          by any other written statement executed by WMX or an underwriter and
          given to ServiceMaster in time to correct the earlier written
          information.

     (c)  Each party entitled to indemnification under this Section 7.12 (herein
          called the "indemnified party") shall give notice to the party
          required to provide indemnification (herein called the "indemnifying
          party") of any claim as to which indemnity may be sought promptly
          after such indemnified party obtains actual

                                       28
<PAGE>
 
          knowledge of such claim, and shall permit the indemnifying party (at
          its expense) to assume the defense of any such claim or any litigation
          resulting therefrom; provided however, that counsel for the
          indemnifying party who shall conduct the defense of such claim or
          litigation shall be reasonably satisfactory to the indemnified party,
          and the indemnified party may participate in such defense at the
          indemnified party's expense; and provided, further, that the omission
          by any indemnified party to give notice as provided herein shall not
          relieve the indemnifying party of its obligations under this Section
          7.12(c), but a refusal to permit the indemnifying party to conduct
          such defense by such counsel shall relieve such indemnifying party of
          its obligations under this Section 7.12(c). No indemnifying party, in
          the defense of any such claim or litigation, shall, except with the
          consent of each indemnified party, consent to entry of any judgment or
          enter in any settlement which is binding on the indemnified party but
          which does not include as an unconditional term thereof the giving by
          the claimant or plaintiff to such indemnified party of a release from
          all liability in respect to such claim or litigation without any
          requirement for payment of any consideration by the indemnified party
          for such release which is not reimbursable by the indemnifying party.
          No indemnified party shall, in connection with any such claim or
          litigation, consent to the entry of any judgment or enter into any
          settlement without the consent of the indemnifying party, which
          consent shall not be unreasonably withheld.

     7.12  Reports to be Filed; Rule 144.  For as long as WMX holds Original
Shares, ServiceMaster shall use all reasonable efforts to file, on a timely
basis, all annual, quarterly and other reports required to be filed by it under
Sections 13 and 15(d) of the Exchange Act, and the rules and regulations of the
SEC thereunder, as amended from time to time.  In the event of any proposed sale
of Original Shares by WMX pursuant to Rule 144 (or any successor rule) under the
Securities Act, ServiceMaster shall cooperate with WMX so as to enable such
sales to be made in accordance with applicable laws, rules and regulations.

     7.13  Personal Rights of WMX.  The rights created by this Part 7 are
personal to WMX, and are not assignable and shall not inure to the benefit of
any subsequent holder of Original Shares; provided, however, that provided
however that WMX shall have the right to include Original Shares beneficially
owned by any of its affiliates in any registration to the same extent that WMX
is entitled to include its own Original Shares in any such registration.


8.   NOTICE COMMITMENT.

     8.1  Information Exchange.  Each party shall supply the other with such
information which the other party shall reasonably deem relevant to the
Relationship Agreements and which the supplying party knows or can obtain.  The
requesting party shall reimburse the supplying party for

                                       29
<PAGE>
 
all expenses the supplying party shall reasonably incur to obtain or provide any
requested information.  No failure or delay by a party to satisfy its
obligations under this Section 8.1 shall justify or entitle the other parties to
delay or not to perform their obligations under this Agreement.

     8.2  Takeover Approaches.  WMX shall use reasonable good faith efforts to
notify ServiceMaster promptly after WMX receives any approach or other contact
from any person indicating that such person may be interested in exploring or
otherwise pursuing (i) any activity which would require WMX to take any action
which would require approval by ServiceMaster to avoid breach of the literal
requirements in this agreement or (ii) a Takeover.  WMX will also provide
ServiceMaster with such other information about each such contact or approach as
ServiceMaster shall reasonably request and which WMX knows or has the ability to
obtain.

     8.3  Actual Delivery.  Whenever any provision in this agreement requires
that a notice be "actually delivered" to a person or uses the day of "actual
delivery" as a standard for starting or ending a time period, that notice shall
be deemed "actually delivered" when (but not until) it shall actually be either
(i)  delivered in writing to the chief executive offices of the recipient and
plainly marked for immediate delivery to the recipient's chief executive
officer, chief financial officer or general counsel or (ii) successfully
transmitted by fax to the principal fax number used by the recipient's chief
executive officer, chief financial officer or general counsel.

     8.4  Regular Transmissions.  In order to be effective, any notice or other
communication pursuant to this Agreement must be in writing and shall be deemed
given if delivered personally, telecopied, sent by nationally recognized
overnight courier or mailed by registered or certified mail (return receipt
requested and postage prepaid) to the recipient at the following address or
telecopy number:

     If to WMX or WMUS:

               WMX Technologies, Inc.
               3003 Butterfield Road
               Oakbrook, Illinois 60521
               Attention: General Counsel
               Telecopy Number: 708 218-1553

     If to ServiceMaster:

               ServiceMaster
               One ServiceMaster Way
               Downers Grove, Illinois 60515
               Attention: General Counsel
               Telecopy Number: 708 271-5870
   
                                       30
<PAGE>
 
Either party may change the address to which notices and other communications
hereunder are to be delivered by giving the other party notice in the manner
herein set forth.


9.   REINCORPORATING MERGER.

     9.1  Adjustments to Reflect Reincorporating Merger.

     (a)  WMX understands that: (i) ServiceMaster's shareholders have previously
          approved a merger described in a proxy statement/prospectus dated
          December 11, 1991 (the "Reincorporation Proxy Statement"); and (ii)
          the Reincorporation Proxy Statement contemplates that ServiceMaster
          Incorporated of Delaware will hereafter install a shareholder rights
          plan.

     (b)  The merger pursuant to which ServiceMaster Incorporated of Delaware
          succeeds to the position now held by ServiceMaster Limited Partnership
          as the ultimate parent company for the ServiceMaster enterprise is
          herein called the "Reincorporating Merger". ServiceMaster Incorporated
          of Delaware as it shall be constituted after giving effect to the
          Reincorporating Merger is herein sometimes called "ServiceMaster
          Incorporated".

     (c)  The Reincorporating Merger, the adoption of a shareholder rights
          program on terms approved by the ServiceMaster Board and other actions
          contemplated by the Reincorporation Proxy Statement or the
          Supplemental Disclosure are herein collectively called the
          "Reincorporation Actions".

     (d)  WMX acknowledges that it has acquired the WM Shares subject to the
          pre-approval of the Reincorporating Merger by ServiceMaster's
          shareholders pursuant to the Reincorporation Proxy Statement. WMX
          agrees that the issuance of the ServiceMaster shares pursuant to the
          Contribution Agreement (including any shares subsequently issued upon
          exercise of the WM Option) does not convey to WMX any right to vote
          with respect to the Reincorporation Actions and that by executing this
          Agreement, WMX grants any approval for the Reincorporation Actions
          which may be required by reason of its ownership of the WM Shares,
          provided that this sentence shall not be deemed to preclude WMX from
          voting on any matter upon which ServiceMaster's shareholders are
          generally entitled to vote in the future. WMX agrees not to contest or
          question ServiceMaster's right to consummate the Reincorporating
          Merger or to install the shareholder rights plan or take any of the
          other Reincorporation Actions.

                                       31
<PAGE>
 
     (e)  After consummation of the Reincorporating Merger (i) the term
          "ServiceMaster" as used in this Agreement shall refer to ServiceMaster
          Incorporated of Delaware and (ii) the term "ServiceMaster shares"
          shall thereafter designate and include shares of common stock issued
          by ServiceMaster Incorporated of Delaware and (iii) this Agreement
          shall remain in effect with respect to WMX, the shares issuable to WMX
          in the Reincorporating Merger, and all other ServiceMaster Shares
          thereafter beneficially owned by WMX and (iv) the consummation of the
          Reincorporating Merger shall not otherwise limit or impair the
          applicability of this Agreement in any respect.

     (f)  ServiceMaster hereby advises WMX that under Section 351 of the
          Internal Revenue Code, the ability of ServiceMaster's shareholders to
          consummate the Reincorporating Merger without recognizing taxable
          income for federal income tax purposes requires that at the time of
          the merger, ServiceMaster's shareholders may not be parties to
          agreements obligating them in the aggregate to dispose of more than
          20% of the ServiceMaster shares then outstanding. WMX hereby covenants
          that it will not be party to any obligation on the date of the
          Reincorporating Merger to Transfer more than 20% of the outstanding
          ServiceMaster shares then beneficially owned by WMX. Not later than
          the fifth business day following actual delivery to ServiceMaster of
          any First Refusal Notice, ServiceMaster shall advise WMX if
          ServiceMaster expects to consummate the Reincorporating Merger within
          the Free Disposition Period following the Review Period. If
          ServiceMaster shall not provide such notice on or prior to such fifth
          business day or if ServiceMaster shall advise in such notice that
          ServiceMaster does not expect to consummate the Reincorporating Merger
          within the relevant Free Disposition Period, then WMX shall have the
          right to enter into agreements during that Free Disposition Period (to
          the extent not prohibited by other provisions in this Agreement) to
          sell any Free Shares which exist during that period without violating
          WMX's covenant in this Section 9.1(f) and shall have no liability on
          account of this Section 9.1(f) by reason of entering into such
          agreement or consummating such sale. ServiceMaster shall provide WMX
          once each calendar quarter with a written notice reminding WMX of
          WMX's obligations under this paragraph and advising WMX when
          ServiceMaster then expects the Reincorporating Merger will occur.

     9.2  Other Retained Control Mergers.

     (a)  In the event ServiceMaster shall engage in any other reorganization,
          merger or other business combination which does not involve a Control
          Change (as defined in Section 11.3) but which does result in the
          conversion of ServiceMaster shares into other shares, the replacement
          of previously outstanding ServiceMaster shares in exchange for other
          shares (herein called a "Retained-Control Merger") then

                                       32
<PAGE>
 
          immediately after such Merger: (i) the entity which shall issue the
          shares issuable in such Merger ("New ServiceMaster") shall have all
          rights granted to "ServiceMaster" under this Agreement and shall be
          subject to all obligations of ServiceMaster under this Agreement and
          the term "ServiceMaster" as used in this Agreement shall thereafter
          refer to New ServiceMaster; (ii) the shares issued in such Merger in
          exchange for ServiceMaster shares shall after such merger become
          "ServiceMaster shares" for purposes of this agreement (and all other
          shares then outstanding or thereafter issued by New ServiceMaster
          shall also be deemed "ServiceMaster shares"); (iii) this Agreement
          shall remain in effect with respect to WMX, the shares issuable to WMX
          in the Merger, and all other ServiceMaster Shares thereafter
          beneficially owned by WMX; and (iv) the consummation of the Merger
          shall not otherwise limit or impair the applicability of this
          Agreement in any respect.

     (b)  ServiceMaster shall take all steps necessary to cause New
          ServiceMaster to be fully bound by all provisions of this Agreement to
          the same extent as if New ServiceMaster had originally executed this
          Agreement in the capacity of ServiceMaster.

     (c)  In the event ServiceMaster shall spin off a business unit which shall
          have produced more than one third of its revenues or earnings during
          the four fiscal quarters most recently ended prior to such spin off or
          shall engage in any other transaction with similar substantive effect,
          then (i) both the enterprise which shall have spun off or otherwise
          distributed those shares and the enterprise which shall be spun off
          shall each be deemed "ServiceMaster" for purposes of this Agreement
          and (ii) each enterprise shall be deemed to be subject to a separate
          agreement identical to this Agreement and for purposes of its
          agreement shall be deemed to be New ServiceMaster and subject to the
          same rights and benefits contemplated for New ServiceMaster under the
          preceding Section 9.2(a).

     (d)  ServiceMaster Board.

          (1)  From the date of this Agreement until the earlier to occur of the
               Reincorporating Merger or any other Retained-Control Merger, each
               of the terms "Board", "Board of Directors", "ServiceMaster
               Board", and other similar terms means the Board of Directors of
               ServiceMaster Management Corporation.

          (2)  At the time the Reincorporating Merger consummates, each of the
               terms "Board", "Board of Directors", "ServiceMaster Board", and
               other similar terms shall change when applied as of a time after
               such consummation and

                                       33
<PAGE>
 
               prior to any change made under the next paragraph to mean the
               Board of Directors of ServiceMaster Incorporated.

          (3)  Upon the consummation of any Retained-Control Merger other than
               the Reincorporating Merger, each of the terms "Board", "Board of
               Directors", "ServiceMaster Board", and other similar terms shall
               change when applied as of a time after such consummation and
               prior to any change made under the next paragraph to mean the
               Board of Directors or other analogous governing body which shall
               govern the entity which shall emerge from such Merger as "New
               ServiceMaster" under the provisions in Section 9.2(a).


10.  LEGENDS.

          Each certificate evidencing WM Shares and each certificate issued in
exchange for or upon the transfer of any WM Shares (if such shares continue to
be WM Shares) shall be stamped or otherwise imprinted with a legend in
substantially the following form:

          "The securities represented by this certificate are subject to certain
          voting, transfer and other restrictions prescribed by a Relationship
          Agreement dated December 31, 1995, with WMX Technologies, Inc. A copy
          of such Relationship Agreement will be furnished without charge by the
          issuer of these securities upon written request."

The legend set forth above shall be removed from the certificates evidencing any
ServiceMaster Shares which cease to be WM Shares by means of Transfers which do
not breach this Agreement.


11.  AGREEMENT TERM.

     11.1 General Rule.

     (a)  This Agreement shall terminate on the first to occur of (i) the first
          day after WMX shall have ceased to be a 1% Owner and shall not have
          been a 1% Owner at any time during the preceding 36 consecutive
          calendar months or (ii) January 1, 2030.

     (b)  After termination of this Agreement, no party shall have any rights or
          obligations under or by reason of this Agreement provided that (i)
          each party shall have the right to prosecute claims which shall have
          arisen or accrued under this Agreement prior to such termination and
          to be reimbursed for the cost of prosecuting such claims to

                                       34
<PAGE>
 
          the extent provided in Section 13 and (ii) each party shall be liable
          for any such claims asserted against it to the extent such claims are
          valid.

     (c)  For purposes of this Agreement, a person shall be deemed to be a 1%
          Owner if such person shall beneficially own at least 1% of the
          ServiceMaster shares then outstanding or shall beneficially own shares
          representing at least 1% of the aggregate voting power of all
          ServiceMaster shares then outstanding.

     11.2 Transition Period.

     (a)  Except as otherwise provided in this Section 11.2, the parties shall
          not be obligated to comply with the requirements of this agreement
          during any period (a "Transition Period") during which WMX is not a 5%
          Owner.

     (b)  During the Transition Period, the parties shall continue to have the
          rights and obligations prescribed by parts 6 - 13 of this Agreement.

     (c)  If requested by ServiceMaster at any time during a Transition Period
          or after the termination of this Agreement, WMX shall cause WMX's
          representative to resign from the ServiceMaster Board promptly after
          actual delivery of such request to WMX.

     (d)  If WMX again becomes a 5% Owner prior to the termination of this
          Agreement, then (i) WMX shall promptly notify ServiceMaster of such
          fact and (ii) the parties shall again be obligated by all the
          provisions in this Agreement until the earlier of the time WMX again
          ceases to be a 5% Owner or the end of the agreement term prescribed in
          Section 11.1.

     11.3 Control Change.

     (a)  If a Control Change shall occur, then all rights and obligations of
          the parties under this Agreement shall terminate upon such occurrence
          except that

          (1)  WMX shall continue to exercise the rights granted under part 7
               until WMX ceases to be a 1% owner and until WMX ceases to be a 1%
               owner, parts 8 -13 shall remain in effect, and

          (2)  So long as WMX shall be a 5% Owner, WMX shall continue to be
               entitled to Board representation in accordance with Part 1, and

                                       35
<PAGE>
 
     (3)  the parties shall have the rights available under the proviso in
          Section 11.1(b).

(b)  Tender Offer Control Change.  A "Control Change" shall be deemed to have
     occurred if and when a single person or a group of persons acting in
     concert shall make a tender offer for ServiceMaster or shall otherwise
     purchase ServiceMaster shares and after such tender offer or purchase such
     person or group shall have ownership of a majority of ServiceMaster's
     outstanding shares.

(c)  Proxy Fight Control Change.  A Control Change shall also be deemed to have
     occurred if and when a majority of positions on the ServiceMaster Board
     shall be filled with Takeover Directors.  A person shall be deemed to be a
     Takeover Director for purposes of this Agreement if such person shall have
     been elected to the Board in a proxy contest in which such person's
     election was opposed by ServiceMaster.

(d)  Merger Control Change.  A "Control Change" shall also be deemed to have
     occurred if and when the following conditions are satisfied:

     (1)  ServiceMaster shall engage in any merger or other business combination
          with another enterprise; and

     (2)  substantially all of the businesses owned directly or indirectly by
          ServiceMaster prior to such combination shall be owned directly or
          indirectly by the ultimate parent corporation which shall emerge from
          such combination (the "acquiring parent"); and

     (3)  a majority of the shares issued by the acquiring parent corporation
          shall be neither (a) shares which shall have been issued by
          ServiceMaster prior to such combination or (b) shares issued in such
          combination in exchange for shares which shall have been issued by
          ServiceMaster prior to such combination; and

     (4)  within six months after such combination a majority of the positions
          on the board of directors of the acquiring parent shall be held by
          persons who were not directors of ServiceMaster prior to such
          combination for any reason other than due to normal retirement, death
          or resignation of directors in the ordinary course.

                                       36
<PAGE>
 
12.  INTERPRETATION OF THIS AGREEMENT.

     12.1 Additional Definitions.  Each of the following terms has the meaning
it is given below whenever it is used in this agreement:

          Affiliate.  A person shall be deemed an "affiliate" of any other
     person if such person shall, directly or through any number of
     intermediaries, (a) control such other person, (b) be controlled by such
     other person, or (c) be controlled by the same person(s) who shall
     ultimately control such other person.  For purposes of the preceding
     sentence a particular person shall be deemed to control another person if
     (i) the particular person is the director or indirect owner of a majority
     of the ownership interest in the other person or (ii) the particular person
     has the power (directly or indirectly) to appoint or elect (either at one
     time or over time) (A) a majority of the members of the board of directors
     of the other person or (B) the person or body having equivalent authority
     over the other person.  Notwithstanding the preceding provisions, none of
     an organization's directors or employees shall be deemed an affiliate of
     that organization for purposes of this Agreement.  No ERISA Plan shall be
     deemed to be an affiliate of WMX for purposes of this Agreement.

          Business Day.  For purposes of this Agreement, a day shall be a
     "business day" unless it shall be (i) a Saturday or Sunday or (ii) a day
     upon which the New York Stock Exchange is not open for trading.

          Exchange Act.  The term "Exchange Act" means the Securities Exchange
     Act of 1934 as constituted at the time such term shall be applied and any
     other federal law in force at such time which shall at such time have
     superseded all or any part of the Exchange Act as constituted on the date
     hereof or which shall govern any activity governed by the Exchange Act as
     constituted on the date hereof.

          Relationship Agreements.  The term "Relationship Agreements" means
     this Agreement and the following additional agreements made by WMX,
     ServiceMaster and certain of their affiliates contemporaneously with this
     Agreement: the Contribution Agreement; the WM Option Agreement; and the
     Cross-Marketing Agreement.

          Securities Act.  The term "Securities Act" means the Securities Act of
     1933 as amended at the time as of which such term shall be applied and any
     other federal law which shall at such time have superseded all or any part
     of the Securities Act as constituted on the date hereof or which shall
     govern any activity governed by the Securities Act as constituted on the
     date hereof.

          Securities Laws.  The term "Securities Laws" means all of the
     following laws as constituted at the time as of which the term shall be
     applied: The Securities Act; the

                                       37
<PAGE>
 
     Exchange Act; all other federal and state laws governing the offer, sale,
     purchase or other activities involving securities; and all governmental
     regulations and requirements issued or arising under any of these laws.

          ServiceMaster.  Prior to the first to occur of the Reincorporating
     Merger or another Non-Takeover Merger, the term "ServiceMaster" shall mean
     ServiceMaster Limited Partnership.  Thereafter the term shall have the
     meaning prescribed in part 9 of this Agreement.

          Transfer.  The term "Transfer" whenever it is used in this Agreement
     designates and includes any sale, transfer, assignment, pledge,
     hypothecation or other direct or indirect disposition of an interest in a
     security.

     12.2 Severability.  To the extent permitted by applicable law, each party
hereby waives any provision of any law or other governmental requirement which
would otherwise render any provision of this Agreement prohibited or
unenforceable in any respect.  Whenever possible, each provision of this
Agreement shall be interpreted in such manner as to be valid and enforceable
under applicable law, but if any provision of this Agreement shall be held to be
prohibited by or unenforceable under applicable law, (i) such provision shall be
applied to accomplish the objectives of the provision as originally written to
the fullest extent permitted by law and (ii) all other provisions of this
Agreement shall remain in full force and effect.  Without limiting by
implication the generality of the foregoing, in the event that the covenant in
Section 4.2 shall for any reason be held unenforceable in connection with any
contested election of directors, then the votes represented by the WMX Voting
Shares shall be distributed among the candidates for election in the same
proportion as the votes cast by persons who are not 5% Owners at the time of
that election.

     12.3 Complete Agreement.  The Relationship Agreements contain the complete
agreement between the parties relating in any way to the subject matter of those
Agreements and supersede any prior understandings, agreements or representations
by or among the parties, written or oral, which may have related to such subject
matter in any way.

     12.4 No Oral Commitments.  No amendment, waiver, modification or
termination of this Agreement shall be effective or enforceable unless it is set
forth in writing and signed by the party against whom it is sought to be
enforced.  No party hereto shall have the right to rely upon or enforce any
representation, warranty, or agreement made by any other person before, on or
after the date hereof and relating to or impacting any of the subjects covered
by this Agreement unless such representation, warranty or agreement shall be set
forth in a writing which shall have been signed by the person to be held
responsible for such representation, warranty or agreement.  No delay or
omission in exercising any right hereunder shall operate as a waiver of such
right or of any other right.  A waiver upon any one occasion shall not be
construed as a bar or waiver of any right or remedy on any future occasion.  All
of the rights and remedies of the parties hereto whether

                                       38
<PAGE>
 
evidenced hereby or by any other agreement, instrument or paper or whether
granted by law, shall be cumulative and may be exercised singly or concurrently.

     12.5  No Strict Construction.  No rule of strict construction, rule
resolving ambiguities against the person who drafted the provision giving rise
to such ambiguities, or other such rule of interpretation shall be applied
against any party with respect to this Agreement.

     12.6  Captions.  The captions used in this Agreement are for convenience
only, do not constitute a part of this Agreement and shall not be deemed to
limit, characterize or affect in any way any of the provisions of this
Agreement, and all of the provisions of this Agreement shall be enforced and
construed as if no captions had been used in this Agreement.

     12.7  Counterparts.  This Agreement shall be come effective when at least
one copy of this Agreement shall have been signed by ServiceMaster and delivered
to WMX and at least one copy of this Agreement shall have been signed by WMX and
delivered to ServiceMaster.  A particular party's signature on a copy of this
Agreement in the possession of any other unaffiliated party shall constitute an
acknowledgment by that particular party that the particular party has received
one or more copies of this Agreement bearing the signatures of all other
parties.  Two or more duplicate originals of this agreement may be signed by the
parties, and in such a case, each duplicate copy shall be deemed an original but
all of the copies together shall be deemed to constitute one and the same
agreement.

     12.8  No Implied Limitation.  The word "including" whenever it is used in
this Agreement shall be interpreted to mean "including but not limited to."  No
provision in this Agreement shall be construed to limit by implication the scope
otherwise indicated by any other provision in this Agreement.

     12.9  Miscellaneous Interpretive Rules.  Whenever the context may require,
any pronoun used in this Agreement shall include the corresponding masculine,
feminine or neuter forms, and the singular form of nouns, pronouns and verbs
shall include the plural and vice versa.  Words such as "herein", "hereinafter",
"hereof", "hereto", "hereby",and "hereunder" shall, unless the context otherwise
requires, be construed to refer to this Agreement.   Except as otherwise
explicitly indicated, each reference to number or letter or a combination
thereof used to identify a portion of this Agreement shall be construed to refer
to all provisions in this Agreement marked by such number, letter or combination
or by an identifier which begins with such number, letter or combination.

     12.10 No Circumvention.

     (a)   No WMX affiliate shall take any action which WMX is prohibited from
           taking under the terms of this Agreement.

                                       39
<PAGE>
 
     (b)   No person shall be permitted to do indirectly by means of any
           transaction or series of transactions, scheme, artifice, device or
           contrivance, no matter how structured or labeled, anything which such
           person may not do directly under this Agreement.

     12.11 No Implied Purchase Obligations or Sale Restrictions.  Nothing in
this Agreement or any other agreement or anything else shall be deemed to create
any express or implied (i) obligation by ServiceMaster to purchase any of its
shares expect to the extent ServiceMaster may become so obligated through
ServiceMaster's election to exercise its first refusal right or (ii) limitation
on ServiceMaster's right to issue or sell shares at such times, in such manner
and on such terms as ServiceMaster shall desire.


13.  MISCELLANEOUS.

     13.1  Governing Law.  This Agreement shall be governed by and construed in
accordance with the internal laws of the State of Delaware,  without giving
effect to any choice of law or conflict of law rules or provisions (whether of
Delaware or any other jurisdiction) that would cause the application of the laws
of any jurisdiction other than Delaware.

     13.2  Assignment.  Except as otherwise provided herein, each party shall be
entitled to assign its rights under this Agreement to any other person but such
assignment shall not release the assignor of its obligation under this Agreement
(whether arising prior to or after such assignment). This Agreement shall inure
to the benefit of and be binding upon the successors in interest to each party
to this Agreement.

     13.3  Consideration.  WMX hereby acknowledges that it has made the
commitments and other covenants in this Agreement in order to induce
ServiceMaster to issue the ServiceMaster shares and the option identified in
Background Paragraph B and that those commitments and  other covenants are
supported by adequate consideration.  Each of the parties hereby (i)
acknowledges and warrants to the other parties that such party intends and
agrees to be bound by every obligation which this Agreement or any of the other
New Relationship Agreements purports to place upon such party and (ii) covenants
that such party will never assert (whether as a defense against any injunction
sought against it, as a defense to any claim brought against it or otherwise)
that any provision in any of the New Relationship Agreements is not enforceable
against such party in accordance with its terms or that any of the New
Relationship Agreements is not legal, valid, or binding in whole or in part.

     13.4  Remedies.

                                       40
<PAGE>
 
     (a)  WMX hereby agrees that in the event WMX or any of its affiliates fails
          to comply with any provision in this Agreement which by its terms
          applies to WMX or any of its affiliates then: (i) money damages and
          any other remedies which might be available to ServiceMaster at law
          would be inadequate and (ii) ServiceMaster shall be entitled to
          specific enforcement of such provision and to injunctive relief to
          prevent any prospective violation of this Agreement, and (iii)
          ServiceMaster shall not be required to post any bond or other security
          in connection with any such specified performance or other injunctive
          relief.

     (b)  ServiceMaster hereby agrees that in the event ServiceMaster or any of
          its affiliates fails to comply with any provision in this Agreement
          which by its terms applies to ServiceMaster or any of its affiliates
          then: (i) money damages and any other remedies which might be
          available to WMX at law would be inadequate and (ii) WMX shall be
          entitled to specific enforcement of such provision and to injunctive
          relief to prevent any prospective violation of this Agreement, and
          (iii) WMX shall not be required to post any bond or other security in
          connection with any such specified performance or other injunctive
          relief.

     (c)  Each party to this agreement shall reimburse the other party for all
          reasonable attorneys fees and other costs which the other party shall
          reasonably incur to enforce the other party's rights under this
          Agreement.

                               *   *   *   *   *

                                       41
<PAGE>
 
     Each party has executed this document at the place provided below in order
to evidence such party's agreement to be bound by all of its terms.



WMX TECHNOLOGIES, INC.

By: 
   ------------------------------
     Name:
          -----------------------
     Title:
           ----------------------



WMI URBAN SERVICES, INC.

By: 
   ------------------------------
     Name:
          -----------------------
     Title:
           ----------------------



SERVICEMASTER LIMITED PARTNERSHIP

By: ServiceMaster Management Corporation
      As Managing General Partner


      By: /s/ Ernest J. Mrozek
         ------------------------------
          Name:  Ernest J. Mrozek
               ------------------------
          Title: Sen. V.P. -- C.F.O.
                -----------------------


SERVICEMASTER INCORPORATED OF DELAWARE

By: /s/ Vernon T. Squires
   ------------------------------
     Name:  Vernon T. Squires 
          -----------------------
     Title: Vice President
           ----------------------
<PAGE>
 
     Each party has executed this document at the place provided below in order
to evidence such party's agreement to be bound by all of its terms.



WMX TECHNOLOGIES, INC.

By: /s/ James T. Koenig 
   ------------------------------
     Name: James T. Koenig 
          -----------------------
     Title:
           ----------------------



WMI URBAN SERVICES, INC.

By: /s/ Dale B. Tauke
   ------------------------------
     Name: Dale B. Tauke
          -----------------------
     Title:
           ----------------------



SERVICEMASTER LIMITED PARTNERSHIP

By: ServiceMaster Management Corporation
      As Managing General Partner


      By: 
         ------------------------------
          Name:  
               ------------------------
          Title: 
                -----------------------


SERVICEMASTER INCORPORATED OF DELAWARE

By: 
   ------------------------------
     Name:  
          -----------------------
     Title: 
           ----------------------



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