ALLIED WASTE INDUSTRIES INC
PRE 14A, 1999-09-17
REFUSE SYSTEMS
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                            SCHEDULE 14A INFORMATION
           Proxy Statement Pursuant to Section 14(a) of the Securities
                              Exchange Act of 1934
                              (Amendment No. _____)

  Filed by the Registrant |X|
  Filed by a Party other than the Registrant |_|

 Check the appropriate box:
 |X|  Preliminary Proxy Statement          |_|  Confidential, for Use of
 |_|  Definitive Proxy Statement                the Commission Only (as
 |_|  Definitive Additional Materials           permitted by Rule 14a-6(e)(2))
 |_|  Soliciting Material pursuant to Rule
      14a-11(c) or Rule 14a-12

                          Allied Waste Industries, Inc.
- --------------------------------------------------------------------------------
                (Name of Registrant as Specified In Its Charter)

Payment of filing fee (Check the appropriate box):

|X|     No fee required.

|_|     Fee computed on table below per Exchange Act Rules 14a-6(i)(4) and 0-11.

         (1) Title of each class of securities to which transaction applies:
            --------------------------------------------------------------------

         (2) Aggregate number of securities to which transactions applies:
            --------------------------------------------------------------------

         (3) Per  unit  price  or other  underlying  value  of  transaction
             computed  pursuant  to  Exchange  Act Rule 0-11 (Set forth the
             amount on which the filing fee is calculated  and state how it
             was determined):
            --------------------------------------------------------------------

         (4) Proposed maximum aggregate value of transaction:
            --------------------------------------------------------------------

         (5) Total fee paid:
            --------------------------------------------------------------------

|_|      Fee paid previously with preliminary materials.

|_|      Check box if any part of the fee is offset as provided by Exchange  Act
         Rule  0-11(a)(2)  and identify the filing for which the  offsetting fee
         was paid  previously.  Identify  the  previous  filing by  registration
         statement number, or the Form or Schedule and the date of its filing.

         1)  Amount Previously Paid:
            --------------------------------------------------------------------

         2)  Form, Schedule or Registration Statement No.:
            --------------------------------------------------------------------

         3)  Filing Party:
            --------------------------------------------------------------------

         4)  Date Filed:
            --------------------------------------------------------------------



<PAGE>


                          ALLIED WASTE INDUSTRIES, INC.
                   15880 NORTH GREENWAY-HAYDEN LOOP, SUITE 100
                            SCOTTSDALE, ARIZONA 85260

                    NOTICE OF SPECIAL MEETING OF STOCKHOLDERS

                         TO BE HELD [OCTOBER] ___, 1999

         We will hold a special  meeting  of the  stockholders  of Allied  Waste
Industries,  Inc. at our corporate  headquarters at 15880 North  Greenway-Hayden
Loop, Suite 100, Scottsdale,  Arizona 85260, on ________,  [October __], 1999 at
9:00 a.m., Mountain Standard Time.

         As part of the  financing  for our recently  completed  acquisition  of
Browning-Ferris Industries,  Inc., we sold shares of Series A Senior Convertible
Preferred  Stock.  The holders of these shares of Senior  Convertible  Preferred
Stock have the right to  convert  their  shares  into  other  securities  of the
company.  However,  the  Senior  Convertible  Preferred  Stock is not  currently
convertible into shares of our common stock.

         At the special meeting you will be asked to:

1.             approve the issuance of our common stock upon  conversion  of the
               Senior  Convertible  Preferred Stock if the holders of the Senior
               Convertible Preferred Stock choose to convert their shares, and

2.             approve an amendment to the 1991 Incentive Stock Plan to increase
               the maximum number of shares of common stock which may be covered
               by awards  under the 1991  Incentive  Stock Plan from 7.5% of the
               issued and outstanding shares of common stock on the final day of
               our  preceding  fiscal  quarter  to 8.5% of the  number  of fully
               diluted  shares of common  stock (as  defined in the Plan) on the
               date of the grant of the award.

         If the first  proposal is approved,  the Senior  Convertible  Preferred
Stock will be convertible only into shares of our common stock. If this proposal
is not approved,  the Senior Convertible Preferred Stock will remain convertible
into a series of junior preferred stock.

         Our  Board  of  Directors  recommends  that  you  vote in favor of this
proposal.  (Certain  directors with a possible  conflict of interest  because of
their  relationship with the holders of the Senior  Convertible  Preferred Stock
abstain from this  recommendation.) If the proposal is not approved,  the Senior
Convertible  Preferred Stock will be more costly to us and will have other terms
which will be less  favorable to us than if the  proposal is  approved.  See the
section entitled  "Reasons for the Board's  Recommendation"  for a more complete
description of the reasons for our recommendation to vote for the proposal.

         Our Board also recommends  approval of the proposal  regarding the 1991
Incentive  Stock  Plan in  order to  assure  that we will  continue  to have the
ability to attract,  motivate and retain  employees  by means of  incentive  and
stock based compensation arrangements.

         No other matters will be considered at the meeting.

         You are  entitled to vote at the  meeting  only if you were an owner of
record of either our common stock or our Senior  Convertible  Preferred Stock as
of the close of business on September  27, 1999.  If you were not a record owner
as of that date,  you are not  entitled to notice of the  special  meeting or to
vote at the meeting. A list of stockholders entitled to vote at the meeting will
be available commencing  [September __], 1999, and may be inspected prior to the
special meeting, during normal business hours at our corporate headquarters.

         Your participation in the special meeting is important.  To ensure your
representation,  if you do not expect to be present at the meeting,  please sign
and  date  the   enclosed   proxy  and  return  it  promptly  in  the   enclosed
postage-prepaid  envelope  which has been  provided  for your  convenience.  The
prompt return of proxies will ensure a quorum and save us the expense of further
solicitation.

                                        By Order of the Board of Directors,

                                        /s/ Thomas H. Van Weelden
                                        Thomas H. Van Weelden
                                        Chairman of the Board,
                                        President and Chief Executive Officer

[September] __, 1999


<PAGE>

                          ALLIED WASTE INDUSTRIES, INC.
                   15880 NORTH GREENWAY-HAYDEN LOOP, SUITE 100
                            SCOTTSDALE, ARIZONA 85260

                                 PROXY STATEMENT

                                    REGARDING

                       THE SPECIAL MEETING OF STOCKHOLDERS
                                   TO BE HELD
                               [OCTOBER __, 1999]
- --------------------------------------------------------------------------------

         We have sent you this proxy statement because the board of directors is
asking you to give your proxy (that is, the authority to vote your  shares),  so
that you can participate at our special meeting of stockholders.

         This  special  meeting  will  be  held  on  [October]  __,  1999 at our
corporate  headquarters  at 15880 North  Greenway-Loop,  Suite 100,  Scottsdale,
Arizona 85260 at 9:00 a.m., Mountain Standard Time.

         This proxy  statement  contains  information  about the  proposal to be
voted on at the  special  meeting and other  information  that may be helpful to
you.

         We began mailing this proxy statement on or about [September] __, 1999.

         Your proxy will be voted in accordance with the directions you specify.
Any proxy on which no direction  is specified  will be voted FOR the approval of
the issuance of shares of our common stock upon the  conversion  of the Series A
Senior Convertible  Preferred Stock and FOR the approval of the amendment to the
1991 Stock  Incentive  Plan  increasing  the maximum  number of shares of common
stock which may be covered by awards under the Plan. A stockholder  may revoke a
proxy by: (1) delivering to us written  notice of revocation,  (2) delivering to
us a proxy signed on a later date or (3)  appearing  at the special  meeting and
voting in person. Abstentions and broker non-votes will be treated as present at
the meeting for purposes of determining a quorum, but will be disregarded in the
calculation of total votes cast on the proposal.

         The cost of  soliciting  proxies  will be borne by us. In  addition  to
solicitations by mail, our officers, directors and employees may solicit proxies
in person or by telephone. They will not receive any extra compensation for this
work. We will also make  arrangements with brokerage firms and other custodians,
nominees  and  fiduciaries  to  forward  proxy  solicitation   material  to  the
beneficial  owners  of  common  stock.  We will  reimburse  them for  reasonable
out-of-pocket  expenses  that  they  incur in  connection  with  forwarding  the
material.



<PAGE>

                 QUESTIONS AND ANSWERS ABOUT THE SPECIAL MEETING


Q.       Who may vote at the special meeting?

A.       You may vote if you were a holder of record of either our common  stock
         or Senior  Convertible  Preferred  Stock as of the close of business on
         September 27, 1999.

Q.       What may I vote on?

A.       Two proposals will be considered at the special meeting:

o                   the  approval of the  issuance of shares of our common stock
                    upon conversion of the Senior Convertible Preferred Stock if
                    the holders of our Senior Convertible Preferred Stock choose
                    to convert their shares (You are not voting on the completed
                    acquisition  of  Browning-Ferris  or the  completed  sale of
                    shares of Senior Convertible Preferred Stock.); and

o                   the amendment of our 1991  Incentive  Stock Plan to increase
                    the  maximum  number of shares of common  stock which may be
                    covered by awards under the Plan.

Q.       What does our board of directors recommend?

A.       The board of directors recommends that you vote

o                   FOR  the  proposal   relating  to  the  Senior   Convertible
                    Preferred Stock.  (Certain directors who are affiliated with
                    some of the  holders  of the  Senior  Convertible  Preferred
                    Stock abstained from the board's  recommendation  because of
                    their possible conflict of interest.)

o        FOR the approval of the amendment to the 1991 Stock Incentive Plan.

Q.       Why  is  the  board  of directors recommending approval of the proposal
         relating to the Senior Convertible Preferred Stock?

A.       The  terms  of the  Senior  Convertible  Preferred  Stock  will be more
         favorable  to the company  and the  holders of our common  stock if the
         proposal is approved.

         The  Senior  Convertible  Preferred  Stock  was  issued  as part of the
         financing for our acquisition of  Browning-Ferris,  which was completed
         on July 30,  1999.  If the  proposal is approved by  stockholders,  the
         board believes terms of the Senior Convertible  Preferred Stock will be
         improved  for the benefit of the  company and our common  stockholders.
         For  example,  we  expect  that  the  dividend  payable  on the  Senior
         Convertible  Preferred Stock will be lower if the proposal is approved.
         In addition,  certain other terms of the Senior  Convertible  Preferred
         Stock  will be more  advantageous  to the  company if the  proposal  is
         approved.  See the section entitled "Proposal for Possible Common Stock
         Issuance -- Reasons for the Board's Recommendation" for a more complete
         description  of  why  certain  directors  abstained  from  the  Board's
         recommendation and of the reasons for the recommendation to approve the
         proposal.

                                       2
<PAGE>

Q.       Why is the  board of directors recommending approval of the proposal to
         amend the 1991 Stock  Incentive  Plan to  increase the number of shares
         which may be covered by awards?

A.       The board  believes  that  increasing  the  number of shares of  common
         stock which may be covered by awards  under the Plan is  necessary   to
         assure that we continue to have the ability to attract,  motivate   and
         retain  employees by means of incentive  and stock based   compensation
         arrangements.  As a result of our acquisition of Browning-Ferris,   our
         existing  employees have increased  responsibilities  and we have  many
         new  employees we want to keep as part of our company.  We believe  all
         of these  employees  should be provided with  appropriate  stock  based
         incentives which will motivate them to increase  stockholder value  and
         remain  dedicated to our  company.  We believe  appropriate  levels  of
         awards under the Plan to  accomplish  these goals  require more  shares
         than are  currently  permitted  to be  covered  by the  Plan.   (If the
         amendment is approved,  the number of shares of our common stock  which
         may be  covered  by new  awards  under  the Plan  will  increase   from
         approximately  .8% to  approximately  5.5% of our  outstanding   common
         stock.)  Therefore,  the amendment to the Plan is necessary to  provide
         the   Compensation   Committee  with   sufficient   ability  to   award
         stock-based incentive compensation in the future.

Q.       Do  any  members  of our board of  directors  have an  interest  in the
         amendment to the Stock Incentive Plan?

A.       Yes. Any  employee  is eligible  for awards  under the Plan,  including
         employees serving on  the board. Thomas Van Weelden,  our President and
         Chief  Executive  Officer,  serves as a  director.  Mr. Van Weelden has
         received  awards  under  the  Plan   in the  past  and,  if  considered
         appropriate  by  our  Compensation  Committee,  may receive  additional
         awards in the future.

         The  amendment  to the  Plan  has  been  approved  by our  Compensation
         Committee,  which  consists only of directors who are not employees and
         who, therefore,  are not eligible to receive awards under the Plan. The
         amendment also was approved by our board of directors, of which nine of
         the eleven members are not employees or former employees.

Q.       What vote is required to approve the proposals?

A.       Approval by a majority of the votes cast is required for each proposal.
         Holders of common  stock and Senior  Convertible  Preferred  Stock will
         vote  together,  as a single  class,  on each  proposal.  Each share of
         common stock is entitled to one vote. Each share of Senior  Convertible
         Preferred Stock is entitled to approximately 55.56 votes. A quorum must
         be present or represented  at the special  meeting for any action to be
         taken. A quorum is at least a majority of the voting power  represented
         by the shares of common stock and Senior  Convertible  Preferred Stock,
         voting together as a single class.

                                       3
<PAGE>

         In  connection  with their  purchase  of Senior  Convertible  Preferred
         Stock,  the holders of shares of Senior  Preferred Stock agreed to vote
         all of the shares of common stock and Senior  Preferred  Stock they own
         for approval of the proposal  relating to the  conversion of the Senior
         Convertible Preferred Stock. These holders own approximately 34% of the
         voting power entitled to vote at the special meeting. These holders and
         our directors and executive officers,  who own securities  representing
         approximately  35% of the voting power  entitled to vote at the special
         meeting,  intend to vote for approval of both  proposals at the special
         meeting.

Q.       How are abstentions and broker non-votes counted?

A.       Both abstentions and broker non-votes are counted in determining that a
         quorum is present for the meeting and are  disregarded  in  calculating
         total votes cast on the proposal.

Q.       What are broker non-votes?

A.       The New York Stock Exchange  permits  brokers to vote their  customers'
         shares on routine  matters when the brokers  have not  received  voting
         instructions  from their  customers.  The election of directors and the
         election of independent  accountants are examples of routine matters on
         which  brokers  may  vote in this  way.  Brokers  may  not  vote  their
         customers' shares on non-routine  matters such as the proposals you are
         being  asked to  consider  at the  special  meeting  unless  they  have
         received voting instructions from their customers.  Non-voted shares on
         non-routine  matters are broker  non-votes.  If your shares are held in
         your  broker's  name,  you must give your broker  instructions  or your
         shares will not be voted at the special meeting.

Q.       If  my shares  are held in "Street  Name" by my broker,  will my broker
         vote my shares for me?

A.       Your broker will not be able to vote your shares  without  instructions
         from  you.  You  should  instruct  your  broker  to vote  your  shares,
         following the directions provided by your broker.

Q.       What do I need to do now?

A.       After reading this document carefully, please vote your shares. You can
         do this by just  completing  and mailing  your signed proxy card in the
         enclosed  return  envelope.  Please do this as soon as possible so that
         your shares can be voted at the special meting.  You may also vote your
         shares by attending the special meeting.

                                       4
<PAGE>

Q.       Can I change my vote after I have mailed my signed proxy card?

A.       Yes,  you can change  your vote at any time  before  your proxy card is
         voted at the  special  meeting.  You can do this in one of three  ways.
         First,  you can send a written notice to us stating that you would like
         to revoke your proxy.  Second,  you can complete and submit a new proxy
         card to us. Third, you can attend the meeting and vote in person.  Your
         attendance  alone will not,  however,  revoke your  proxy.  If you have
         instructed a broker to vote your shares,  you must follow the procedure
         provided by your broker to change these instructions.

Q.       Do I need to attend the special meeting in person?

A.       No. It  is not necessary for you to attend the special meeting in order
         to vote your shares, although you are welcome to attend.

Q.       Where can I find more information about Allied Waste?

A.       We file reports and other  information with the Securities and Exchange
         Commission.  You may read and copy this  information  at the Securities
         and Exchange Commission's public reference facilities.  Please call the
         SEC at  1-800-SEC-0330  for information  about these  facilities.  This
         information  is also  available at the Internet site  maintained by the
         SEC at  http://www.sec.gov  and at the  office  of the New  York  Stock
         Exchange.

Q.       Who can help answer my questions?

A.       If you have questions  about the special  meeting or the proposal after
         reading this proxy statement,  you should contact ____________ at (800)
         _________.






                                       5
<PAGE>



                           FORWARD-LOOKING STATEMENTS


         This proxy statement includes and incorporates by reference  statements
that are not historical facts. These statements are "forward-looking statements"
(as defined in the Private  Securities  Litigation  Reform Act of 1995) based on
our current plans and expectations  relating to analyses of value,  expectations
for anticipated  growth in the future and future success under various  efforts,
and, as such,  these-forward-looking  statements  involve  uncertainty and risk.
Although we believe  that the  expectations  reflected  in such  forward-looking
statements are reasonable,  we can give no assurance that such expectations will
prove to have been correct. Generally, these statements relate to business plans
or strategies,  projected or anticipated  benefits or other consequences of such
benefits from acquisitions,  divestitures or financings made by or to be made by
us, or  projections  involving  anticipated  revenues,  internal  growth  rates,
earnings,  levels of capital expenditures or other aspects of operating results.
All phases of our operations are subject to a number of uncertainties, risks and
other influences, many of which are outside our control and any one of which, or
a combination of which,  could  materially  affect the results of our operations
and  whether  forward-looking  statements  made  by us  ultimately  prove  to be
accurate.  These forward -looking  statements should be read in conjunction with
our Annual Report on Form 10-K for the year ended December 31, 1998, as amended,
our Quarterly  Reports on Form 10-Q, and our Current  Reports on Form 8-K, which
describe  many of the external  factors  that could cause our actual  results to
differ materially from our expectations.  Our Form 10-K, as amended, Forms 10-Q,
and Forms 8-K are on file with the Securities and Exchange Commission. Copies of
these  documents are available  without  charge upon written  request to: Allied
Waste Industries, Inc., 15880 North Greenway-Hayden Loop, Suite 100, Scottsdale,
Arizona 85260, Attention: Secretary.

         Other factors and assumptions  not identified  above or incorporated by
reference  could cause actual results to differ  materially from those set forth
in the forward-looking  statements. We do not undertake any obligation to update
the forward-looking statements contained or incorporated in this proxy statement
to reflect actual results,  changes in assumptions,  or changes in other factors
affecting these forward-looking statements.





                                       6
<PAGE>




                          OUTSTANDING VOTING SECURITIES

         September  27,  1999 is the record  date for  determining  stockholders
entitled  to vote at the special  meeting.  Holders of shares as of the close of
business on the record date are entitled to vote at the special  meeting.  As of
that date, there were  [188,494,886]  shares of common stock  outstanding.  Each
share of common stock entitles its holder to one vote at the special meeting. As
of that  date,  there  were  1,000,000  shares  of  Series A Senior  Convertible
Preferred Stock outstanding.  Each share of Senior  Convertible  Preferred Stock
entitles  its  holder to  approximately  55.56  votes  per share at the  special
meeting.  The common  stock and  Senior  Convertible  Preferred  Stock will vote
together, as a single class, at the special meeting.


PROPOSAL FOR POSSIBLE COMMON STOCK ISSUANCE

         The first  proposal  to be  considered  and voted  upon at the  special
meeting is to approve the issuance of shares of common stock upon  conversion of
the Senior  Convertible  Preferred  Stock if the holders of any shares of Senior
Convertible Preferred Stock choose to convert their shares.

         At the time we completed our acquisition of Browning-Ferris Industries,
Inc., we sold 1,000,000 shares of the Senior Convertible  Preferred Stock for $1
billion in cash.  This $1 billion was used to help  finance the  acquisition  of
Browning-Ferris  for cash.  The purchasers of the Senior  Convertible  Preferred
Stock were investors (the "Preferred  Stock  Purchasers")  led by affiliates of,
and persons related to, Apollo Advisors II, L.P. or Blackstone  Capital Partners
II Merchant Banking Fund L.P. (collectively, the "Apollo/Blackstone Investors").

         The terms of the Senior  Convertible  Preferred Stock include the right
of the holders of shares of this stock to convert, at the option of the holders,
their shares into fractional units of shares of a new series of junior preferred
stock or, if approval by our stockholders is received, into shares of our common
stock. In either case, the current conversion price is $18.00 per unit or share.
(As of July 30, 1999,  their date of issuance,  the  1,000,000  shares of Senior
Convertible  Preferred Stock were  convertible,  at the option of their holders,
into an aggregate of 55,555,556 units of one ten-thousandth of a share of junior
preferred stock. Assuming these 1,000,000 shares of Senior Convertible Preferred
Stock had been immediately  convertible  into our common stock,  they would have
been  convertible,  at the  option  of  their  holders,  into  an  aggregate  of
55,555,556 shares of common stock as of July 30, 1999.)

         However,  if stockholder  approval for the issuance of shares of common
stock upon conversion of the Senior Convertible Preferred Stock is not received,
other terms of the Senior  Convertible  Preferred Stock,  including the dividend
rate  payable by us,  will be less  favorable  to the company and the holders of
shares of common stock. These terms are described below. Therefore, the Board of
Directors  (with  certain   directors  with  a  possible  conflict  of  interest
abstaining) is asking  stockholders  to approve the issuance of shares of common
stock  upon  conversion,  at the  holders'  option,  of  shares  of  the  Senior
Convertible Preferred Stock.

                                       7
<PAGE>

         Stockholders  are not being asked to vote upon or approve the completed
acquisition of  Browning-Ferris or the completed issuance and sale of the Senior
Convertible Preferred Stock. Similarly, the vote of stockholders will not affect
the  voting  power of the  securities  already  issued  to the  Preferred  Stock
Purchasers.  The vote by stockholders  only will determine  certain terms of the
Senior Convertible Preferred Stock. (For example, if stockholder approval is not
received  by  January  30,  2000,  the  minimum  dividend  rate  on  the  Senior
Convertible  Preferred  Stock will  increase  from 6.5% to 7.5% per annum of the
stock's liquidation preference (including accrued but unpaid dividends) and will
increase  further by 1% in each  subsequent  six month  period,  up to a maximum
dividend rate of 12% per annum of the stock's liquidation  preference (including
accrued but unpaid dividends), until stockholder approval is received.)

Why Stockholder Approval is Being Sought

         Under  Delaware law and our  certificate of  incorporation,  we are not
required  to obtain  stockholder  approval  of the  issuance of shares of common
stock upon conversion of the Senior Convertible  Preferred Stock.  However,  the
outstanding  shares of common  stock are listed on the New York Stock  Exchange,
Inc. (the "NYSE") and the shareholder approval policy of the NYSE requires us to
obtain  stockholder  approval  of the  issuance  of shares of common  stock upon
conversion of the Senior Convertible Preferred Stock.

         Specifically,  the  NYSE  requires  stockholder  approval  prior to the
issuance  of common  stock or  securities  convertible  into  common  stock to a
director,  officer,  or holder of five percent or more of a company's  voting or
common stock (a "Related  Party") or any  affiliate of a Related Party or entity
in which a Related Party has a  substantial  interest if the number of shares of
common  stock to be issued,  or into which the  securities  may be  convertible,
exceeds one percent (or, in certain cases,  five percent) of the common stock or
voting  stock  outstanding  before the  issuance.  Before our sale of the Senior
Convertible  Preferred  Stock, the  Apollo/Blackstone  Investors owned more than
five  percent of our  outstanding  common stock and had  representatives  on our
board of directors.  Consequently,  the Apollo/Blackstone Investors were Related
Parties. Of the one million shares of Senior Convertible Preferred Stock sold in
connection with the acquisition of Browning-Ferris, 790,000 of these shares were
sold to affiliates of, and persons related to, the  Apollo/Blackstone  Investors
and, therefore, to Related Parties or their affiliates. These 790,000 shares had
an initial liquidation  preference of $790 million and, at a conversion price of
$18.00 per share,  initially  would be  convertible at the option of the holders
into an  aggregate  of  approximately  43.89  million  shares of  common  stock,
representing approximately 23.3% of the Common Stock outstanding as of August 9,
1999 (before taking into account any shares  issuable upon  conversion of Senior
Convertible  Preferred Stock).  210,000 shares of Senior  Convertible  Preferred
Stock were issued to parties who are not Related Parties.  However,  because all
shares  of  the  Senior  Convertible   Preferred  Stock  have  the  same  terms,
stockholder  approval  also  will  cover  the  issuance  of  common  stock  upon
conversion of these shares.

         In addition, stockholder approval also will cover any additional shares
of common stock  issuable upon  conversion of the Senior  Convertible  Preferred
Stock as a result of any increases in the liquidation preference of the stock or
changes in the conversion  price, as a result of antidilution  provisions in the
stock.

                                       8
<PAGE>

         Issuance of common stock or securities  convertible into or exercisable
for common stock in contravention of the NYSE shareholder  approval policy would
permit the NYSE to seek delisting of the shares of common stock. Accordingly, we
are seeking stockholder approval.  If stockholder approval is not obtained,  the
Senior Convertible Preferred Stock will not be convertible into shares of common
stock.  Instead, the Senior Convertible  Preferred Stock will remain convertible
into a junior preferred stock having rights and terms no worse to the holders of
fractional  units of the junior  preferred  stock than those of the common stock
and, in certain respects, more favorable than the common stock.

         The rules and regulations of the NYSE require approval by a majority of
the votes  cast by  holders  of shares of common  stock and  Senior  Convertible
Preferred Stock on the proposal to approve the issuance of common stock upon the
conversion of the Senior  Convertible  Preferred Stock,  provided that the total
vote cast on the proposal  represents over 50% of the voting power of all shares
of common  stock and  Senior  Convertible  Preferred  Stock  outstanding.  (This
stockholder  approval is sometimes  referred to as the "Stockholder  Approval.")
The Preferred Stock Purchasers and the  Apollo/Blackstone  Investors have agreed
to vote the  26,351,447  shares of common stock and  1,000,000  shares of Senior
Convertible  Preferred  Stock they own,  representing  approximately  34% of the
voting power of securities  entitled to vote at the special meeting, in favor of
this proposal.


THE BOARD  RECOMMENDS  THAT  STOCKHOLDERS  VOTE FOR  APPROVAL OF THE ISSUANCE OF
COMMON  STOCK  UPON  CONVERSION  OF  THE  SENIOR  CONVERTIBLE   PREFERRED  STOCK
(Directors   with  a  possible   conflict   of   interest   abstain   from  this
recommendation.)

         As explained under "Reasons for the Board's  Recommendation," the Board
is recommending that stockholders approve the issuance of shares of common stock
upon the conversion of the Senior Convertible  Preferred Stock, at the option of
the holders, because the Board believes that the terms of the Senior Convertible
Preferred Stock will be clearly more advantageous to the company and the holders
of common stock if  stockholders  approve this issuance.  (Board members who are
designees of the  Apollo/Blackstone  Investors abstain from this  recommendation
because of their possible conflict of interest.)

         For  example,  the  terms of the  Senior  Convertible  Preferred  Stock
provide that the minimum  dividend rate on the stock will increase from 6.5% per
annum of the stock's  liquidation  preference  by 1% after each six month period
following the issuance of the Senior Convertible  Preferred Stock if stockholder
approval for the issuance of common stock upon conversion is not received by the
end of such  six-month  period.  On the other hand, if  stockholder  approval is
received  then the minimum  dividend  rate on the Senior  Convertible  Preferred
Stock shall be fixed at 6.5% per annum of the liquidation preference,  generally
without any increase  until the tenth  anniversary of the issuance of the Senior
Convertible Preferred Stock. Clearly,  payment of a 6.5% per annum dividend rate
on the Senior  Convertible  Preferred  Stock is  preferable  for the company and
holders of common stock to the payment of  dividends  on the Senior  Convertible
Preferred  Stock at a  higher  rate,  whether  7.5% per  annum  or  greater.  In
addition, certain other terms of the Senior Convertible Preferred Stock are more
advantageous to the company if stockholder approval is obtained. These terms are
described below under "Reasons for the Board's Recommendation."


                                       9
<PAGE>

Terms of Preferred Stock

         The  terms  of the  Senior  Convertible  Preferred  Stock  and  related
agreements resulted from negotiations  between  representatives of the Preferred
Stock Purchasers, on the one hand, and members of our Board of Directors who did
not have a relationship or financial  interest in the Preferred Stock Purchasers
("Disinterested   Directors")  and  the  advisors  and  representatives  of  the
Disinterested  Directors,  on the other hand. The  Disinterested  Directors were
advised by independent  legal and financial  advisors.  In connection with their
approval of these matters,  the Disinterested  Directors were fully aware of the
material   facts   relating  to  the   interests   of  the   designees   of  the
Apollo/Blackstone  Investors  on the Board of Directors  in these  matters.  The
Disinterested  Directors separately discussed and approved these matters and the
Disinterested  Directors  concluded  that  the  transactions  were  fair  to the
company.  (In connection with their deliberations,  the Disinterested  Directors
received  an  opinion  to the  effect  that the sale of the  Senior  Convertible
Preferred  Stock was fair from a  financial  point of view to the  company  from
their independent financial advisor.)

         A  summary  of the  terms of the  Senior  Convertible  Preferred  Stock
follows:

o                 par value:  each share has a par value of $.10 per share.

o        ranking: shares have a preference with respect to dividend payments and
         distributions  upon our voluntary or  involuntary  liquidation  senior,
         prior and superior to all other shares of our capital stock, including,
         but not limited to, shares of common stock,  Junior Preferred Stock (as
         defined below) or any other series of our preferred stock.

o                 dividends: shares  entitle  holders  to  cumulative  quarterly
         dividends in  an  amount  equal  to the  greater  of  (i) the dividends
         payable on the shares of common  stock or junior  preferred  stock then
         issuable upon the  assumed  conversion  of Senior Convertible Preferred
         Stock (the "Equivalent Dividend") and (ii) 6.5% per annum of the sum of
         the  liquidation  preference  of  the  shares  plus  accrued but unpaid
         dividends  for  prior  quarters (provided, however, that if Stockholder
         Approval is not obtained before six months  after the  issuance  of the
         Senior  Convertible  Preferred  Stock,  then  the  dividend  rate  will
         increase by 1% per annum for each consecutive, non-overlapping full six
         month calendar period until Stockholder Approval is  obtained,  up to a
         maximum  rate of 12% per annum,  and  provided,   further,  that in any
         event,  the rate for dividends  accruing after  July 30, 2004 which are
         not paid in cash and dividends  accruing  after  July 30, 2009 shall be
         12% per annum).  Cash  dividends  will be payable  only if, as and when
         declared by our Board of Directors. If dividends  are not paid in cash,
         then the liquidation  preference of the  Senior  Convertible  Preferred
         Stock increases as described below.

                                       10
<PAGE>

o        liquidation  preference:  shares have an initial liquidation preference
         of $1,000 per share and the  liquidation  preference  will  increase by
         accrued and unpaid dividends;  shares shall be entitled to receive upon
         any liquidation, dissolution or other winding-up of the company, before
         any  distribution or payment is made to holders of any other classes of
         stock,  the greater of (i) the liquidation  preference,  plus dividends
         accrued  with  respect  to the  period  from the most  recent  dividend
         payment date through and excluding the date of determination,  and (ii)
         the amount  that would be payable to holders of such shares if they had
         converted  all their  shares  into  common  stock (or Junior  Preferred
         Stock)  immediately  prior  to the  liquidation,  dissolution  or other
         winding-up.

o        voting:  in addition to any voting rights  provided by law, shares have
         the number of votes  equal to the number of shares of common  stock (or
         units of Junior  Preferred  Stock)  issuable  upon  conversion  of such
         shares;  the shares will vote on all matters submitted to stockholders,
         vote  together  with  all such  stockholders  as one  class,  vote as a
         separate  class  with  respect  to  amendments  to our  Certificate  of
         Incorporation   that   adversely   affect  the  rights  of  the  Senior
         Convertible  Preferred  Stock  and for the  election  of the  number of
         directors  that the  Apollo/Blackstone  Investors  are then entitled to
         elect  under  the terms of the  Shareholders  Agreement  (as  described
         below).

o        redemption:  shares may be  redeemed in whole but not in part by us, if
         Stockholder Approval has been received prior thereto, at any time on or
         after  July 30,  2004 (or,  on or after  July 30,  2002 if the  average
         closing  price of the common stock for the thirty  consecutive  trading
         days preceding the redemption exceeds 150% of the conversion price then
         in effect upon at least 30 days' notice).

o                 change of control:  shares may be sold back to the company, at
         the  holder's option,  at 101% of liquidation  preference plus accrued
         but   unpaid   dividends  following   a   change   of  control  of  the
         company. (A  change  of   control  is  defined as (a) a person or group
         beneficially   owning  50%  or  more  of  the total voting power of all
         of our  outstanding  voting  stock  ( other  than the Apollo/Blackstone
         Investors  or their  affiliates),   (b)  a  majority  of  our  Board of
         Directors  being  comprised  of  persons  (other  than  nominees of the
         Apollo/Blackstone   Investors    or   their      affiliates)    neither
         nominated  nor   appointed  by  the  Board  of   Directors,  (c) Allied
         Waste  North  America,   Inc.  ceasing  to  be our subsidiary unless we
         otherwise  directly  or  indirectly   own   substantially   all  of its
         assets  or  (d)  the  sale,   transfer   or lease by the  company (on a
         consolidated   basis)    or   Allied   Waste   North    America  (on  a
         consolidated  basis)  of  all  or   substantially   all  of its  assets
         unless   the  assets   continue  to  be owned directly or indirectly by
         the company.

o        conversion   rights:   shares  have  certain   conversion   rights.  If
         Stockholder  Approval is  obtained,  the Senior  Convertible  Preferred
         Stock will be  convertible at the option of the holders into the number
         of  shares  of  Common  Stock  obtained  by  dividing  the  liquidation
         preference  plus  accrued but unpaid  dividends  by $18.00,  subject to
         customary  antidilution  provisions.   Until  Stockholder  Approval  is
         obtained,   shares  of  Senior  Convertible  Preferred  Stock  will  be
         convertible  at the option of the  holders  into the number of units of
         one  ten-thousandth  of a share of a newly  created  series  of  junior
         preferred stock, Series B Junior Preferred Stock,  obtained by dividing
         the liquidation preference by $18.00, subject to customary antidilution
         provisions.


                                       11
<PAGE>

         The Junior  Preferred  Stock  issuable  upon  conversion  of the Senior
Convertible Preferred Stock unless Stockholder Approval is obtained means Series
B Junior  Preferred  Stock. A summary of the terms of the Junior Preferred Stock
follows:

o                 par value:  each share has a par value of $.10.

o        ranking:  shares are junior and  subordinate to the  preferences of any
         other shares of preferred stock (other than shares which by their terms
         are not senior to the Junior  Preferred Stock) with respect to dividend
         payments  and   distributions   upon  the   voluntary  or   involuntary
         liquidation, dissolution or winding-up of the company.

o        dividends: whenever we declare a dividend on shares of common stock, we
         must declare a dividend on each share of Junior  Preferred  Stock equal
         to the  greater of (i) $100 and (ii)  10,000  times the  aggregate  per
         share  dividend  declared  on each  share of common  stock,  subject to
         antidilution adjustments, but shares shall have a claim prior to common
         stock on such distributions.

o        voting:  in addition to any voting  rights  provided by law, each share
         entitles its holder to 10,000 votes on all matters  submitted to a vote
         of the  holders  of shares of common  stock,  subject  to  antidilution
         adjustments,  with  Junior  Preferred  Stock and  common  stock  voting
         together as a single class,  except that shares will vote separately as
         a  class  on  amendments  to our  Certificate  of  Incorporation  which
         adversely  affect  the  rights  of the  shares  and for the  number  of
         directors  that the  Apollo/Blackstone  Investors  are then entitled to
         elect  under  the  terms of the  Shareholders  Agreement  (unless  such
         directors  have been  elected by the holders of the Senior  Convertible
         Preferred Stock).

o        liquidation preference:  upon any voluntary or involuntary liquidation,
         dissolution or winding-up of the company no distribution  shall be made
         to holders  of shares,  including  common  stock,  junior to the Junior
         Preferred Stock unless each share of Junior  Preferred Stock shall have
         first  received $100 plus all accrued,  declared but unpaid  dividends;
         thereafter,   once  each  share  of  common   stock  has  received  one
         ten-thousandth  of the amount paid to a share of Junior Preferred Stock
         (subject to antidilution adjustments), then holders of Junior Preferred
         Stock  and  common  stock  shall  share   proportionately   in  further
         distributions  in the ratio of 10,000 to one  (subject to  antidilution
         adjustments).

o                 redemption:  shares are not redeemable.

                                       12
<PAGE>

o        merger:  in the event of a merger or other  transaction in which shares
         of  common  stock  are  changed  or  exchanged,  then  shares of Junior
         Preferred  Stock shall be exchanged in an amount per share  (subject to
         antidilution  adjustments)  equal to 10,000  times the amount of stock,
         cash or property  into which or for which each share of common stock is
         changed or exchanged.

o        conversion: upon receipt of any required stockholder approval under the
         rules of the NYSE or when  otherwise  permitted,  each  share of Junior
         Preferred Stock will  automatically  be converted into 10,000 shares of
         common stock, subject to antidilution adjustments.

         As part of the  sale of the  Senior  Convertible  Preferred  Stock,  we
granted the  Preferred  Stock  Purchasers  and the  Apollo/Blackstone  Investors
certain  registration  rights in respect  of common  stock,  Senior  Convertible
Preferred  Stock,  and  Junior  Preferred  Stock in  addition  to the rights the
Apollo/Blackstone  Investors  had  before  the sale.  These  rights  permit  the
Preferred  Stock  Purchasers and the  Apollo/Blackstone  Investors to demand the
registration  of their  shares of common  stock,  Senior  Convertible  Preferred
Stock, and Junior Preferred Stock under the federal  securities laws and to have
these securities included in certain other registration statements that we file.
In addition,  upon  completion of the sale of the Senior  Convertible  Preferred
Stock,  certain  amendments to the previously  existing  Shareholders  Agreement
became  effective.  Among  other  things,  these  amendments  provide  that  the
Apollo/Blackstone  Investors  are  entitled to designate  five  directors on our
Board of Directors out of a maximum of 13 directors (as compared to the previous
four  designees  out of a maximum of 11  directors),  subject to decrease if the
Apollo/Blackstone   Investors   decrease  their  stock  ownership  by  specified
percentages  or  if  we  dilute  their   ownership  below  certain  levels  (the
Apollo/Blackstone  Investors shall lose the right to elect one director for each
reduction  of 20% of the number of shares they own and if issuances by us reduce
their  ownership to 9% or less of the voting power then they will be entitled to
no more than three board designees); and the voting and standstill provisions of
the Shareholders Agreement shall apply to the Senior Convertible Preferred Stock
and any shares of common stock and Junior Preferred Stock issued upon conversion
of the Senior  Convertible  Preferred  Stock and shall be extended to last until
July 30, 2009 (subject to earlier  termination  under certain  circumstances set
forth in the current terms of the Shareholders  Agreement).  See "Agreement With
Certain Stockholders."

         This proxy  statement  contains a summary of the material  terms of the
Senior  Convertible  Preferred  Stock,  Junior  Preferred  Stock and the amended
Shareholders  Agreement and  registration  rights  agreement  with the Preferred
Stock  Purchasers.  We have filed with the  Securities  and Exchange  Commission
copies of the certificates of designation for the Senior  Convertible  Preferred
Stock and the Junior Preferred Stock and the amended Shareholders  Agreement and
registration  rights  agreement as exhibits to a Current  Report on Form 8-K and
incorporate  these  documents  into this proxy  statement by reference.  You may
obtain copies of these documents free of charge.  See  "Incorporation of Certain
Documents by Reference".


                                       13
<PAGE>

Reasons for the Board's Recommendation

         The Board recommends that  stockholders vote to approve the issuance of
Common Stock upon conversion of the Senior  Convertible  Preferred  Stock.  (The
designees of the Apollo/Blackstone  Investors abstain from all references to the
Board's  recommendation  or beliefs in this  section  because of their  possible
conflict of interest.  This possible  conflict of interest exists because of the
ownership  of  Senior  Convertible  Preferred  Stock  by  the  Apollo/Blackstone
Investors  or their  affiliates  and related  persons.  The members of our Board
designated  by  the  Apollo/Blackstone  Investors  are  Messrs.  Gross,  Kaplan,
Ressler, Blitzer and Lipson.)

         The Board's  recommendation  is based  primarily on the Board's  strong
belief  that it is more  advantageous  to the  company  and holders of shares of
common  stock  to  ensure  that  the  dividend  rate on the  Senior  Convertible
Preferred  Stock be fixed at 6.5% per  annum of  liquidation  preference  for at
least the first five years  following  issuance  rather than the higher dividend
rates payable if Stockholder Approval is not obtained (assuming, as is currently
expected,  that the Equivalent  Dividend yields a lesser  amount).  In addition,
certain  other  terms of the  Senior  Convertible  Preferred  Stock will be more
advantageous  to the  company  and the  holders of common  stock if  stockholder
approval  is  obtained.  Specifically,  we will not be able to redeem the Senior
Convertible  Preferred  Stock if  Stockholder  Approval  has not been  obtained.
Moreover, the Disinterested  Directors believe that the issuance of common stock
instead of Junior  Preferred  Stock is in the best  interests  of the holders of
common  stock.  The  Disinterested   Directors  felt  so  strongly  about  their
conclusions that they required the parties who purchased the Senior  Convertible
Preferred  Stock to commit to vote  their  shares  of  common  stock and  Senior
Preferred  Stock in favor of this  proposal  at any meeting of  stockholders  at
which the proposal is presented.  If Stockholder Approval is not obtained at the
special meeting,  it is our intention to resubmit the proposal at other meetings
of stockholders until Stockholder Approval is obtained.

         Dividends on the Senior Convertible Preferred Stock will be $65 million
per year based upon a 6.5% rate (assuming the  Equivalent  Dividend is lower and
dividends  can be paid in cash) and would be $75  million  (or  greater)  if the
dividend  rate  increased  because  Stockholder  Approval has not been  obtained
within six months of July 30, 1999.  (In addition,  if dividends are not paid in
cash,  a lower  dividend  rate also will  result  in lower  amount of  aggregate
subsequent  dividends  because accrued  dividends not paid in cash will increase
the liquidation  preference of the Senior Convertible  Preferred Stock, which is
the  amount  upon  which  dividends  and the  number  of  shares  issuable  upon
conversion  are  calculated.  A higher  liquidation  preference  will  mean more
dilution to existing holders of common stock if the Senior Convertible Preferred
Stock is  converted.) It is in our interests and the interests of the holders of
common stock to have a lower dividend rate on the Senior  Convertible  Preferred
Stock.

         Until Stockholder  Approval is obtained,  shares of Senior  Convertible
Preferred  Stock  may not be  redeemed.  However,  if  Stockholder  Approval  is
obtained,  the Senior Convertible  Preferred Stock may be redeemed at our option
on or after July 30, 2004 (and, in certain  circumstances,  on or after July 30,
2002). (Our ability to redeem stock or to pay cash dividends on capital stock is
subject to restrictions in the agreements with our banks as well as in the terms
of our other  indebtedness.)  The  flexibility to redeem the Senior  Convertible
Preferred  Stock at such future times may permit us to  refinance  such stock at
more favorable  terms based upon market  conditions at such time or to force the
conversion  of such  stock if such stock is "in the  money"  and  thereby  avoid
paying dividends at a rate in excess of that then being paid on shares of common
stock. Either of these actions would benefit us and the holders of common stock.

                                       14
<PAGE>

         The Board's  recommendation  is further supported by the Board's belief
that the terms of the Junior  Preferred  Stock  issuable upon  conversion of the
Senior Convertible  Preferred Stock if Stockholder  Approval is not obtained are
at least as  attractive,  and may be viewed as more  attractive,  to a holder of
such  stock as the  rights of a holder of shares  of common  stock.  The  Junior
Preferred  Stock will have the same voting and dividend  rights as common stock,
would receive the same per share  consideration  if we are sold, and will have a
liquidation  preference  senior to the  common  stock.  Consequently,  the Board
believes  holders of common stock may be better off and, in any event,  no worse
off if common  stock is issued  instead of Junior  Preferred  Stock.  (The Board
recognizes  that the Junior  Preferred  Stock may be less  liquid than shares of
common  stock  because  it is not  listed on the NYSE and has no other  existing
trading  market;  however,  this possible  difference is not likely to produce a
benefit for holders of common stock.)

         Therefore, the Board believes that stockholders have the opportunity to
favorably change our obligation under the Senior Convertible Preferred Stock by:

o        fixing the dividend rate at the minimum level of 6.5% per annum,

o        retaining  the  flexibility  to redeem the Senior Convertible Preferred
         Stock when otherwise permitted to do so, and

o             changing the equity security issuable upon exercise to one (common
              stock)  which,  in the Board's  view,  is no less  favorable  and,
              perhaps,  more favorable to the holders of common stock than would
              be  the  case  if  Junior   Preferred  Stock  were  issuable  upon
              conversion because Stockholder Approval were not obtained.


Proposal to amend the 1991 incentive stock plan

         The second  proposal  to be  considered  and voted upon at the  special
meeting  is to  approve  an  amendment  to the 1991  Incentive  Stock Plan as it
previously  has been  amended  and  restated  (the  "Incentive  Stock  Plan") to
increase  the maximum  number of shares of common  stock which may be covered by
awards under the  Incentive  Stock Plan from 7.5% of the issued and  outstanding
shares of common stock on the final day of our preceding fiscal  quarter to 8.5%
of that number of fully  diluted  shares of common stock on the date of an award
under the Incentive Stock Plan.

         In 1991,  the Board of Directors  adopted the Incentive  Stock Plan and
our  stockholders   approved  the  Incentive  Stock  Plan  at  our  1991  Annual
Stockholders' Meeting held on July 9, 1991.

                                       15
<PAGE>

The Amendment

         After receiving the  recommendation  of our Management  Development and
Compensation Committee (the "Compensation  Committee"),  in September, 1999, the
Board adopted an amendment to the Incentive  Stock Plan,  subject to stockholder
approval. If the necessary stockholder approval is received,  the amendment will
increase  the  number of shares of common  stock  which may be covered by awards
under the  Incentive  Stock Plan from 7.5% of the shares of common  stock issued
and  outstanding in the final day of our previous  fiscal quarter to 8.5% of the
number of fully diluted shares of common stock as of the date an award under the
Plan is made.  For  purposes of the  Incentive  Stock Plan,  the number of fully
diluted  shares of  common  stock  includes  the  aggregate  of all  issued  and
outstanding shares of common stock, any shares of common stock issuable upon the
vesting or payment of awards or exercise of options  under any employee  benefit
plan,  including  the  Incentive  Stock Plan,  shares of common stock  otherwise
available or reserved for issuance under employee  benefit plans,  including the
Incentive  Stock Plan,  and shares of common  stock  issuable  upon  exercise or
conversion of any outstanding warrants,  options or convertible securities.  For
these  purposes,  shares  of  Senior  Convertible  Preferred  Stock  are  deemed
convertible  into shares of common stock and,  therefore,  the stockholder  vote
regarding  the  issuance  of common  stock  upon the  conversion  of the  Senior
Convertible  Preferred Stock will not affect the number of shares subject to the
Incentive Stock Plan.  (The relevant  provision is contained in Section 3 of the
Incentive  Stock Plan.  This Section in its current form and after giving effect
to the amendment is attached as Exhibit A to this proxy statement.)

         Under the current terms of the Incentive  Stock Plan and based upon the
188,112,392  shares of common stock issued and  outstanding on June 30, 1999 and
188,494,886  shares  outstanding  as of  August  9,  1999,  awards  covering  an
aggregate of 14,108,429 shares of common stock are available under the Incentive
Stock Plan.  Previously granted awards under the Incentive Stock Plan which have
been exercised covered approximately 1,301,003 shares of common stock. Currently
outstanding  awards  under  the  Incentive  Stock  Plan  cover an  aggregate  of
approximately  11,362,106  shares  of common  stock.  Consequently,  new  awards
covering   approximately   1,445,320   shares  of  common  stock   (representing
approximately  .8% of our  outstanding  common  stock) are  permitted  under the
current  terms of the Plan. If the  amendment is approved,  new awards  covering
approximately 10,421,859 shares of common stock (representing approximately 5.5%
of our  outstanding  common  stock) would be permitted  based upon fully diluted
shares  as of  August  9,  1999 and  after  taking  into  account  the  proposed
amendment.  Approval  of the  amendment  will  increase  the number of shares of
common  stock  which may be  covered by new  awards by  approximately  8,976,539
shares (representing approximately 4.8% of our outstanding common stock).

Reasons for the Amendment

         The purpose of our stock-based incentive plans, including the Incentive
Stock Plan, is to provide key employees with a continuing  proprietary  interest
in the Company,  with a view to increasing  the interest in our welfare of those
personnel who share primary  responsibility  for our management  and growth.  In
addition, these plans provide a significant non-cash form of compensation, which
is  intended  to benefit  the  Company by enabling it to continue to attract and
retain qualified personnel.

                                       16
<PAGE>

         As a result of our acquisition of  Browning-Ferris,  existing employees
have increased  responsibilities.  Moreover, we have acquired many new employees
whose  continued  employment  and  dedication to the Company is important to our
successfully  integrating  Browning-Ferris into our operations and using it as a
platform  for future  growth.  In order to provide all of these  employees  with
appropriate stock-based incentives and to further motivate them to help increase
stockholder value, both the Compensation  Committee and the entire Board believe
that our stock  incentive  plans should have the capacity to provide  meaningful
awards  which can create  performance  targets  for  employees  and  significant
encouragement for them to remain with the Company.

         Currently,  all of our stock incentive  plans,  including the Incentive
Stock Plan,  permit awards covering an aggregate of  approximately  1.45 million
shares of common stock.  The Board and  Compensation  Committee  believe greater
capacity is necessary to assure that the purposes of our stock  incentive  plans
can be achieved.  It is expected that if this  amendment to the Incentive  Stock
Plan is approved by  stockholders,  our  Compensation  Committee  will  consider
granting new awards  under the Plan in 1999 as a means of providing  appropriate
incentive and  performance  based  compensation to key employees in light of the
acquisition of Browning-Ferris.

Description of Incentive Stock Plan

         The Incentive  Stock Plan  provides for the grant of (i)  non-qualified
stock options,  (ii) incentive stock options,  (iii) shares of restricted stock,
(iv) shares of phantom  stock,  (v) stock  bonuses and (vi)  performance  awards
(collectively,  "Incentive  Awards").  In  addition,  the  Incentive  Stock Plan
permits the grant of cash  bonuses  payable  when a  participant  is required to
recognize  income for federal income tax purposes in connection with the vesting
of shares of  restricted  stock or the grant of a stock  bonus.  Key  employees,
including  officers (whether or not they are directors),  of the Company and its
subsidiaries will be eligible to participate in the Incentive Stock Plan.

         The Incentive Stock Plan is currently administered by the Compensation
Committee.  The  Compensation  Committee,  at  present,  comprises Messrs. Nolan
Lehmann,  Howard  Lipson  and  Antony P.  Ressler.  The  Compensation  Committee
determines which key employees receive grants of Incentive  Awards,  the type of
Incentive  Awards and bonuses  granted and the number of shares  subject to each
Incentive Award.

         Subject to the terms of the  Incentive  Stock  Plan.  the  Compensation
Committee  will also determine the prices,  expiration  dates and other material
features  of the  Incentive  Awards  granted  under the Plan.  The  Compensation
Committee may, in its absolute  discretion,  (i) accelerate the date on which an
option  granted  under  the  Incentive  Stock  Plan  becomes  exercisable,  (ii)
accelerate the date on which a share of restricted  stock or phantom stock vests
and waive any conditions imposed by the Compensation Committee on the vesting of
a share of restricted stock and (iii) grant Incentive Awards to a participant on
the condition  that the  participant  surrender to the Company for  cancellation
such other Incentive Awards  (including,  without  limitation.  Incentive Awards
with higher exercise prices) as the Compensation Committee specifies.

                                       17
<PAGE>

         The  Compensation  Committee  will have the  authority to interpret and
construe any provision of the  Incentive  Stock Plan and to adopt such rules and
regulations for  administering  the Incentive Stock Plan as it deems  necessary.
All decisions and  determinations  of the  Compensation  Committee are final and
binding  on  all  parties.  The  Company  will  indemnify  each  member  of  the
Compensation Committee against any cost, expense or liability arising out of any
action,  omission or determination  relating to the Incentive Stock Plan, unless
such  action,  omission  or  determination  was  taken or made in bad  faith and
without reasonable belief that it was in the best interest of the Company.

         The Board of Directors may at any time amend the  Incentive  Stock Plan
in any respect:  provided,  that, without stockholder approval, no amendment may
(i)  increase  the number of shares of Common Stock that may be issued under the
Incentive  Stock  Plan,  (ii)  materially  increase  the  benefits  accruing  to
individuals   holding   Incentive   Awards,   or  (iii)  materially  modify  the
requirements as to eligibility for participation in the Incentive Stock Plan.

         A summary of the most significant  features of the Incentive Awards and
the tax consequences to recipients thereof, follows.

         Non-Qualified and Incentive Stock Options.  The exercise  price of each
non-qualified  stock option  ("NQO") and each  incentive  stock  option  ("ISO")
granted  under the  Incentive  Stock  Plan  shall be the fair  market  value (as
defined) of a share of Common Stock of the Company on the date on which such NQO
or ISO is granted.  NQOs and ISOs shall  hereinafter be referred to collectively
as "Options". Except in certain limited cases regarding grants of ISOs, each ISO
and NQO  shall  be  exercisable  for a  period  not to  exceed  ten  years.  The
Compensation  Committee  shall  establish  the term of each Option.  Each Option
shall  vest over a three  year  period  at a rate of  one-third  of the  Options
vesting per year.  The exercise  price shall be paid in cash or,  subject to the
approval of the  Compensation  Committee,  in shares of Common  Stock  valued at
their fair market value on the date of exercise.

         Except in the  event of the  death or  disability  (as  defined)  of an
optionee or the  termination  of the  employment  of an  optionee  for cause (as
defined),  Options  are  exercisable  only while an  optionee is employed by the
Company or within one month after such  employment  has terminated to the extent
that such Options were  exercisable on the last day of employment.  In the event
of the death or disability of an optionee,  Options are  exercisable  within one
year  after such  death or  disability  to the  extent  that such  Options  were
exercisable  on the last day of employment.  In the event of the  termination of
the  employment  of an optionee  for cause,  all Options  held by such  optionee
terminate immediately. Options are not transferable other than by will or by the
laws of descent and distribution or pursuant to a qualified  domestic  relations
order and, in the case of NQOs, in certain  situations to family  members of the
optionee or trusts or partnerships involving family members of the optionee.

         Upon the occurrence of a change in control of the Company (a "Change in
Control"), all Options become immediately exercisable.  The Incentive Stock Plan
defines  Change in  Control to mean (i) a "change  in  control"  as that term is
defined in the federal  securities  laws,  (ii) the acquisition by any person of
20% or more of the shares of voting securities of the Company (provided that the
Board of Directors,  as constituted immediately prior to such stock acquisition,
may determine  that a change of control has not  occurred),  (iii) a majority of
the  individuals  nominated by the Board of Directors  for election to the Board
fail to be  elected  to the  Board as a  result  of a proxy  fight or  contested
election  for  positions on the Board of Directors or (iv) any other event which
the Compensation  Committee  determines to constitute a change in control of the
Company.

                                       18
<PAGE>

         An optionee  will not  recognize any income for federal tax purposes at
the time an NQO is granted,  nor will the Company be entitled to a deduction  at
that time.  However,  when any part of an NQO is  exercised,  the optionee  will
recognize  ordinary  income in an amount  equal to the  difference  between  the
exercise price of the NQO and the fair market value of the shares received,  and
the Company will  recognize a tax  deduction in the same amount  (subject to the
limitations of Section 162(m) discussed below).

         A  participant  will not  recognize  any  income  at the time an ISO is
granted,  nor upon a qualified  exercise of an ISO.  If a  participant  does not
dispose of the shares  acquired by exercise of an ISO within two years after the
grant of the ISO and one year after the  exercise  of the ISO,  the  exercise is
qualified and the gain or loss (if any) on a subsequent sale will be a long-term
capital gain or loss.  Such gain or loss is the sum of the sales  proceeds  less
the  exercise  price for the stock sold.  The  Company is not  entitled to a tax
deduction as the result of the grant or qualified exercise of an ISO.

         Restricted  Stock A grant of shares of restricted  stock represents the
promise of the Company to issue  shares of its Common  Stock on a  predetermined
date  (the  "Issue  Date")  to  a  participant,   provided  the  participant  is
continuously employed by the Company until the Issue Date. Vesting of the shares
occurs on a second  predetermined  date (the "Vesting  Date") if the participant
has been  continuously  employed  by the Company  until that date.  Prior to the
Vesting Date, the shares are not transferable by the participant and are subject
to forfeiture.  The Compensation Committee may, at the time shares of restricted
stock are granted,  impose  additional  conditions to the vesting of the shares,
such as, for example, the achievement of specified performance goals. Vesting of
some  portion,  or all,  of the  shares of  restricted  stock may occur upon the
termination  of the employment of a participant  other than for cause,  prior to
the Vesting  Date.  If vesting does not occur,  shares of  restricted  stock are
forfeited.

         Upon the  occurrence  of a Change in Control,  all shares of restricted
stock which have not vested or been forfeited will vest automatically.

         A participant will not recognize any income for federal tax purposes at
the time shares of restricted stock are granted or issued,  nor will the Company
be entitled to a tax deduction at that time. However,  when shares of restricted
stock vest, the participant will recognize ordinary income in an amount equal to
the fair  market  value of the shares of  restricted  stock on the date on which
they vest.  If,  however,  a participant  files an  appropriate  election  under
Section  83(b) of the Internal  Revenue Code with the IRS within  thirty days of
the issuance of the restricted  stock,  the  participant  will be deemed to have
received  ordinary  income in an amount  equal to the fair  market  value of the
shares  of  restricted  stock  on  the  date  on  which  they  are  issued  (the
"Election").  The Company  will be entitled to a tax  deduction  at the time the
participant  makes the  Election  in an amount  equal to the amount of  ordinary
income  recognized by the  participant  (subject to the  limitations  of Section
162(m) discussed below).

                                       19
<PAGE>

         The  Compensation  Committee may grant,  in connection  with a grant of
shares of  restricted  stock,  a cash "tax"  bonus,  payable when an employee is
required to recognize  income for federal  income tax  purposes  with respect to
such  shares.  The tax bonus may not be greater  than the value of the shares of
restricted  stock at the time the income is required to be recognized.  The cash
"tax bonus" will be recognized as ordinary income by the participant at the time
the shares vest and the  participant  is entitled to the cash "tax  bonus".  The
Company  will  be  entitled  to a tax  deduction  at the  time  the  participant
recognizes the ordinary  income equal to the ordinary  income  recognized by the
participant.

         Phantom Stock. A share of phantom stock represents the right to receive
the economic  equivalent of a grant of restricted stock. Shares of phantom stock
are subject to the same vesting  requirements as are shares of restricted stock.
Upon vesting of a share of phantom stock, the holder is entitled to receive cash
in an amount  equal to the sum of (i) the fair market value of a share of Common
Stock as determined  on the vesting date and (ii) the  aggregate  amount of cash
dividends  paid  in  respect  of a share  of  Common  Stock  during  the  period
commencing  on the date of grant,  and  ending  on the  vesting  date.  The cash
payment for phantom stock is treated the same as a cash bonus for federal income
tax purposes  and creates a deduction  to the Company when paid  (subject to the
limitations  of Section 162(m)  discussed  below).  In addition,  the value of a
share of phantom  stock  (whether  or not vested) is paid  immediately  upon the
occurrence  of a Change in Control of the Company.  The  Committee may not grant
any cash bonus in connection with the grant of shares of phantom stock.

         Stock and Cash Bonuses.  Bonuses payable in stock may be granted by the
Compensation  Committee  and may be payable  at such  times and  subject to such
conditions as the Compensation Committee determines. Upon the receipt of a stock
bonus, a participant will recognize  ordinary income for federal tax purposes in
an  amount  equal  to the  fair  market  value  of the  stock  at the time it is
received.  The Company will be entitled to a tax  deduction in an equal  amount.
The  Compensation  Committee may grant, in connection with a stock bonus, a cash
"tax"  bonus,  payable  when an employee is  required  to  recognize  income for
federal income tax purposes with respect to such stock bonus.  The tax bonus may
not be  greater  than the  value of the  stock  bonus at the time the  income is
required to be  realized.  The grant of a cash bonus shall not reduce the number
of shares of Common Stock with respect to which  Options,  shares of  restricted
stock,  shares of phantom stock or stock bonuses may be granted  pursuant to the
Incentive Stock Plan.

         Performance  Awards.  The Compensation  Committee may grant performance
awards  payable  in cash or  common  stock  upon  the  attainment  of  objective
performance goals  established  before the award grant. The Committee may grant,
in connection with the grant of performance  awards,  a cash "tax bonus" payable
when an employee is required to recognize income for federal income tax purposes
with respect to shares of common stock granted as a performance  award.  The tax
bonus  may not be  greater  than the  value of the  shares  of stock at the time
income is recognized by the employee.

                                       20
<PAGE>

         A participant will not recognize any income for federal tax purposes at
the time a performance  award is granted and the Company will not be entitled to
a tax deduction at that time.  However,  a participant  will recognize  ordinary
income at the time the performance award, in the form of shares or cash, is paid
to the  participant.  The  amount of cash paid or the fair  market  value of the
shares  paid at the time  they  become  available  will be the  amount of income
recognized by the participant.  In addition,  the participant will recognize any
cash "tax bonus" awarded in conjunction with a performance share at the time the
performance share is otherwise deemed taxable. The Company will be entitled to a
tax  deduction at the time the  participant  recognizes  the amounts into income
equal to the amount of recognized ordinary income.

         In  General.  If  any  outstanding  Option  expires,  terminates  or is
canceled for any reason,  the shares of Common Stock subject to the  unexercised
portion of such Option shall again be available  for grants under the  Incentive
Stock Plan. If any shares of restricted stock or phantom stock, or any shares of
Common Stock  granted in a stock bonus are forfeited or canceled for any reason,
such shares shall again be available for grants under the Incentive Stock Plan.

         The  Incentive  Stock Plan  provides for an adjustment in the number of
shares of Common Stock  available to be issued under the  Incentive  Stock Plan,
the number of shares  subject to Incentive  Awards,  and the exercise  prices of
certain Incentive Awards upon a change in the  capitalization of the Company,  a
stock  dividend or split,  a merger or  combination  of shares and certain other
similar  events.  The Incentive  Stock Plan also provides for the termination of
Incentive Awards upon the occurrence of certain corporate events.

         The  Incentive  Stock  Plan  provides  that  participants  way elect to
satisfy certain federal income tax withholding requirements by remitting cash to
the  Company.  In addition,  the  Incentive  Stock Plan  provides  that,  at the
election of a participant,  an unrelated  broker-dealer  acting on behalf of the
participant may exercise Options granted to the participant and immediately sell
the  shares  acquired  on  account  of the  exercise  to raise  funds to pay the
exercise price of the Option and the amount of any  withholding tax which may be
due on account of the exercise.

         Limitations on Company Deductions.  Section 162 of the Internal Revenue
Code denies a deduction to any publicly held corporation for  compensation  paid
to certain  executives  in a taxable  year to the extent that such  compensation
exceeds $1 million (subject to certain exceptions) for a covered employee. It is
possible  that  compensation  attributable  to stock options  (including  income
derived from the exercise of certain  options as measured by the spread  between
the exercise  price and the fair market value of our common stock at the time of
exercise)  and other awards under the Incentive  Stock Plan,  when combined with
all other types of compensation received by a covered employee from the Company,
may cause this limitation to be exceeded in any particular year.

         Certain kinds of compensation,  including qualified  "performance-based
compensation,"  are  disregarded  for purposes of the deduction  limitation.  In
accordance with proposed Treasury regulations issued under Internal Revenue Code
Section  162(m),  compensation  attributable to stock options and similar awards
will qualify as  performance-based  compensation,  provided  that: (i) the stock
plan  contains  a  per-employee  limitation  on the  number of shares  for which
options and similar awards may be granted during a specific period; (ii) the per
employee  limitation is approved by the stockholders;  (iii) the option or award
is granted by a compensation  committee  comprised solely of "outside directors"
and (iv) either the exercise price of the option is no less than the fair market
value of the stock on the date of grant or the  option or award is  granted  (or
exercisable)  only  upon  (as  certified  by  the  compensation  committee)  the
achievement of an objective  performance  goal  established by the  compensation
committee while the outcome is substantially uncertain.  Currently, awards under
the Incentive Stock Plan do not qualify as "performance-based compensation".

                                       21
<PAGE>

New Plan Benefits

         It is currently expected that the Compensation  Committee will consider
the grant of new awards under the  Incentive  Stock Plan in late 1999 as a means
of providing  appropriate  incentive and performance  based  compensation to key
employees  in light  of our  acquisition  of  Browning-Ferris  Industries,  Inc.
However, the Compensation Committee has not yet made any determination as to the
nature,  amount or recipients  of awards under the  Incentive  Stock Plan if the
amendments to the Plan are approved by stockholders.

         The  Compensation  Committee  made  awards of stock  options  under the
Incentive  Stock Plan,  the 1993  Incentive  Stock Plan,  and the 1994 Incentive
Stock Plan during the fiscal year ended  December  31,  1998.  Information  with
respect to these awards is contained in our Annual Report,  as amended,  on Form
10-K/A for the year ended  December  31,  1998 and our Proxy  Statement  for our
Annual  Meeting  of  Stockholders  held on May 26,  1999.  These  documents  are
incorporated  herein by reference.  See  "Incorporation  of Certain Documents by
Reference". The following table provides certain information with respect to the
options granted during our fiscal year ended December 31, 1998:

                                         Number of shares of
                                         common stock underlying options
           Name and Position             granted (1)
Thomas H. Van Weelden                            0
     Chairman of the Board of
     Directors, President and Chief
     Executive Officer
Roger A. Ramsey                                  0
     Former Chairman of the Board of
     Directors
Steven M. Helm                                   40,000
     Vice President - Legal and
     Corporate Secretary
Larry D. Henk                                    200,000
     Vice President and Chief
     Operating Officer
Henry L. Hirvela                                 150,000
     Vice President and Chief
     Financial Officer
Donald W. Slager                                 110,000
     Vice President - Operations
All executive officers as a group                665,000
     (including the six officers named
     above)
All directors who are not executive              0 (2)
     officers
All employees who are not executive              1,750,600
     officers as a group

                                       22
<PAGE>

(1) All options  were  granted  with an exercise  price equal to the fair market
value  of our  common  stock  on the  date of  grant.  For the  named  executive
officers, the exercise price ranged from $21.063 to $21.188 per share.

(2)  Non-employee  directors  are not  eligible  to  receive  grants  under  the
Incentive  Stock  Plan.  See our  Proxy  Statement  for our  Annual  Meeting  of
Stockholders  held on May 26, 1999 for  information  regarding our  Non-Employee
Director Stock Option Plan.

         In addition,  during 1999, the Compensation Committee has awarded under
the  Incentive  Stock Plan options  covering an aggregate of  approximately  1.6
million shares of common stock to the six executive officers named in the table,
options  covering an aggregate  of  approximately  1.8 million  shares of common
stock to all executive officers as a group, and options covering an aggregate of
3.6  million  shares  of common  stock to all  employees  who are not  executive
officers,  with the exercise price of such options ranging from $13.31 per share
to $15.00 per share.

Required Vote

         Approval of the  amendment  to the  Incentive  Stock Plan  requires the
affirmative  vote of a majority of the votes cast on the proposal by the holders
of common stock and Senior  Convertible  Preferred  Stock,  voting together as a
single class.

The board recommends that stockholders vote for approval of the amendment to the
1991 incentive stock plan.


                                       23
<PAGE>

                                OTHER INFORMATION


PRINCIPAL STOCKHOLDERS

         The  following  table  sets forth  certain  information,  derived  from
filings  with  the   Securities   and  Exchange   Commission  and  other  public
information,  regarding the beneficial  ownership of our common stock and Senior
Convertible  Preferred  Stock at August 9, 1999 by: (i) each person who is known
by us to beneficially  own more than five percent of the  outstanding  shares of
common stock or Senior  Convertible  Preferred  Stock,  (ii) each of our current
Directors,  and the  executive  officers,  and (iii) all current  Directors  and
executive officers as a group.  Except as otherwise  indicated below and subject
to  applicable  community  property  laws,  each owner has sole  voting and sole
investment  powers with respect to the stock listed. As of August 9, 1999, there
were 188,494,886  shares of our common stock outstanding and 1,000,000 shares of
Senior Convertible Preferred Stock outstanding.




                                       24
<PAGE>

<TABLE>
<CAPTION>

                                                                                                  Approximate    Combined Voting
                                                                                 Beneficial       Percent of  Power of Ownership of
                                                  Beneficial      Approximate    Ownership of     Outstanding   Common and Senior
                                                 Ownership of     Percent of       Senior           Senior      Preferred Stock as
                                                 Common Stock    Outstanding      Preferred       Preferred   Approximate Percent of
                                                 (Shares) (2)    Common Stock   Stock (Shares) (3)   Stock      all  Voting Power
                                                 ------------   --------------  ------------------   ------   ----------------------
    Name of Person or Identity of Group(l)
    --------------------------------------
<S>                                               <C>               <C>                  <C>              <C>               <C>
Thomas H. Van Weelden                             1,993,324(4)      1.1%                 0                0                 *
Roger A. Ramsey                                   1,462,942(5)      *                    0                0                 *
Apollo Investment Fund III, L.P.
Apollo Overseas Partners III, L.P.
Apollo (UK) Partners III, L.P.
Apollo Investment Fund IV, L.P.
Apollo Overseas Partners IV, L.P.
Apollo/AW LLC
  c/o Apollo Advisors, II, L.P. and Apollo
Management IV, L.P. (4)                          17,119,579(6)      9.1%            440,000              44%               17.0%
  Two Manhattanville Road
  Purchase, New York 10577
Blackstone Capital Partners II Merchant Banking
Fund L.P.
Blackstone Offshore Capital Partners II L.P.
Funds managed by Blackstone Management
Associates II L.L.C and Blackstone Management
Associates III L.L.C. (5)
  345 Park Avenue, 31st Floor
  New York, New York 10154                        9,231,868(7)      4.9%            350,000              35%               11.8%
Nolan Lehmann                                     1,089,175(8)      *                    0                0                 *
Henry L. Hirvela                                    201,667(9)      *                    0                0                 *
Donald W. Slager                                     93,480(10)     *                    0                0                 *
Larry D. Henk                                       363,401(11)     *                    0                0                 *
Steven M. Helm                                      119,913(12)     *                    0                0                 *
Michael Gross                                    17,166,256(13)     9.1%            440,000              44%               17.0%
David B. Kaplan                                  17,166,713(13)     9.1%            440,000              44%               17.0%
Antony P. Ressler                                17,166,698(13)     9.1%            440,000              44%               17.0%
Howard A. Lipson                                  9,276,868(14)     4.9%            350,000              35%               11.8%
Dennis Hendrix                                       51,825(15)     *                    0                0                 *
Warren B. Rudman                                     46,513(15)     *                    0                0                 *
Vincent Tese                                         46,584(15)     *                    0                0                 *
DLJ Stockholders(16)                                      0         0               110,000              11%                2.5%
Greenwich Stockholders(17)                                0         0               100,000              10%                2.3%
David Blitzer(18)                                 9,231,868         4.9%            350,000              35%               11.8%
Capital Research and Management Company
333 South Hope Street
Los Angeles, CA  90071(19)                       10,573,200         5.6%                 0                0%                8.2%
All Directors and executive officers as a group
(17 persons)(2)-(3),(8)-(15), (20)               32,173,838        14.6%            790,000(21)          79%               31.2%



                                       25
<PAGE>




<FN>



- -------------
*    Does not exceed one percent.

(1)  Unless  otherwise  indicated,  the  address  of each person or group listed
     above is 15880 North Greenway-Hayden  Loop, Suite 100, Scottsdale,  Arizona
     85260.

(2)  Does  not  include  any  shares of common  stock that may be acquired  upon
     conversion of shares of Senior Convertible Preferred Stock.

(3)  Currently,  each share of Senior Convertible Preferred Stock is entitled to
     approximately 55.56 votes and, if Stockholder Approval is obtained,  may be
     converted  at the option of the holder into  approximately  55.56 shares of
     common stock.

(4)  Includes   1,113,305   shares  of  common stock that may be acquired on the
     exercise of options and warrants.

(5)  Includes  1,130,805  shares of  common  stock  that  may be acquired on the
     exercise of options.

(6)  Apollo Advisors II, L.P. ("Apollo  Advisors") serves as general partner for
     each of Apollo  Investment Fund III, L.P.,  Apollo  Overseas  Partners III,
     L.P. and Apollo (UK) Partners III,  L.P.,  which  directly own  15,632,717,
     934,397  and 577,783  shares of common  stock,  respectively,  representing
     8.3%,  0.5% and 0.3% of the  outstanding  common stock,  respectively,  and
     directly  own  89,163,  6,  691,  and 4,146  shares  of Senior  Convertible
     Preferred  Stock,  respectively.  The general partner of Advisors is Apollo
     Capital Management II, Inc. ("Capital  Management II"). Apollo Advisors IV,
     L.P. ("Advisors IV") serves as general partner to each of Apollo Investment
     Fund IV, L.P., and Apollo  Overseas  Partners IV, L.P.,  which directly own
     284,175  and  15,825  shares  of  Senior   Convertible   Preferred   Stock,
     respectively.  The  general  partner  of  Advisors  IV  is  Apollo  Capital
     Management IV, Inc.  ("Capital  Management  IV").  AIF IV Management,  Inc.
     ("Management") serves as the general partner of Apollo Management IV, L.P.,
     which serves as the manager of Apollo/AW  LLC,  which  directly owns 40,000
     shares of Senior Convertible  Preferred Stock.  Messrs.  Gross,  Kaplan and
     Ressler are principals of Capital  Management II, Capital Management IV and
     Management and each disclaims beneficial ownership of the indicated shares.
     The directors and principal  executive  officers of Capital  Management II,
     Capital Management IV, and Management are Leon D. Black and John J. Hannan.
     The  foregoing  information  is based on  Schedules  13D filed on behalf of
     these persons with the Securities and Exchange Commission.

(7)  Blackstone Management Associates II L.L.C. ("Blackstone Associates") serves
     as the sole  general  partner of  Blackstone  Capital  Partners II Merchant
     Banking Fund L.P. ("BCP II") and Blackstone Family  Investment  Partnership
     II L.P. ("BFIP II") and the sole  investment  general partner of Blackstone
     Offshore Capital Partners II L.P. ("BOCP II"). Blackstone Services (Cayman)
     LDC is the  administrative  general  partner  of BOCP II.  Pursuant  to the
     partnership  agreement of BOCP II, Blackstone Associates has the sole power
     to  vote  securities  held by BOCP II and the  sole  power  to  dispose  of
     securities  held by BOCP II.  Blackstone  Management  Associates III L.L.C.
     ("BMA  III")  serves as the sole  general  partner  of  Blackstone  Capital
     Partners III Merchant  Banking Fund L.P. ("BCP III") and Blackstone  Family
     Investment  Partnership  III L.P.  ("BFIP  III")  and the  sole  investment
     general  partner of Blackstone  Offshore  Capital  Partners III L.P. ("BOCP
     III").  Pursuant to the partnership  agreement of BOCP III, BMA III has the
     sole  power  to vote  securities  held by BOCP  III and the  sole  power to
     dispose of securities held by BOCP III. Blackstone Associates, BCP II, BOCP
     II, BFIP II, BCP III, BOCP III and BFIP III are collectively referred to as
     the  "Blackstone  Investors".  Messrs.  Peter G.  Peterson  and  Stephen A.
     Schwarzman  are the founding  members of Blackstone  Associates and BMA III
     and as such may be deemed to share beneficial  ownership of the shares held
     by the Blackstone Investors. The other members of Blackstone Associates and
     BMA III are David A. Stockman, Michael B. Hoffman, James J. Mossman, Arthur
     B. Newman,  Anthony Grillo,  J. Tomilson Hill,  Mark T. Gallogly,  Glenn H.
     Hutchins,  Howard A. Lipson,  Thomas J. Saylak and John Z. Kukral.  Each of
     BCP II, BOCP II and BFIP II directly own  6,611,545,  1,962,385 and 657,938
     shares  of  the  outstanding  common  stock,   respectively,   representing
     approximately 3.5%, 1.0% and 0.4% of such outstanding shares, respectively.
     BCP III, BOCP III and BFIP III directly own  277,540.586,  51,459.414,  and
     21,000 shares of Senior  Convertible  Preferred Stock. Mr. Lipson is Senior
     Managing  Director  of  Blackstone  Associates  and BMA  III and  disclaims
     beneficial ownership of the indicated shares. The foregoing  information is
     based on Schedules 13D filed on behalf of the Blackstone Investors with the
     Securities and Exchange Commission.

(8)  Includes  (i)  1,000,000  shares  of  common  stock  that are  beneficially
     owned by an affiliate of Mr. Lehmann and (ii) 62,500 shares of common stock
     that may be acquired on the exercise of options.

(9)  Includes  196,667  shares of common   stock  that  may  be  acquired on the
     exercise of options.

(10) Includes 92,180 shares of common stock that may be acquired on the exercise
     of options.

(11) Includes  343,514  shares  of common  stock  that may be  acquired  on  the
     exercise of options.

(12) Includes  119,413  shares  of common  stock  that may be  acquired  on  the
     exercise of options.


                                       26
<PAGE>


(13) Includes (i) 17,119,579 shares of common stock and 440,000 shares of Senior
     Preferred Stock beneficially owned by the Apollo Investors, and (ii) 45,000
     shares  that may be acquired  on the  exercise of options.  Each of Messrs.
     Gross,  Kaplan and Ressler  disclaims  beneficial  ownership  of the shares
     referred to in (i).

(14) Includes (i) 9,231,868  shares of common stock and 350,000 shares of Senior
     Preferred Stock  beneficially owned by the Blackstone  Investors,  and (ii)
     45,000  shares that may be acquired on the exercise of options.  Mr. Lipson
     disclaims beneficial ownership of the shares referred to in (i).

(15) Includes 45,000 shares of common stock that may be acquired on the exercise
of options.

(16) The DLJ  Stockholders  are DLJMB Funding II, Inc., a Delaware  corporation,
     DLJ Merchant Banking Partners II, L.P., a Delaware limited partnership, DLJ
     Merchant Banking Partners II-A, L.P., a Delaware limited  partnership,  DLJ
     Diversified Partners, L.P., a Delaware limited partnership, DLJ Diversified
     Partners-A.L.P.,  a Delaware limited partnership,  DLJ Millennium Partners,
     L.P., a Delaware limited  partnership,  DLJ Millennium  Partners-A.L.P.,  a
     Delaware  limited  partnership,  DLJ  First ESC L.P.,  a  Delaware  limited
     partnership, DLJ Offshore Partners II, C.V., a Netherlands Antilles limited
     partnership ("Offshore II"), DLJ EAB Partnership,  L.P., a Delaware limited
     partnership and DLJ ESC II L.P., a Delaware  limited  partnership.  Each of
     the DLJ Stockholders  other than Offshore II has a business address c/o DLJ
     Merchant  Banking II,  Inc.,  277 Park  Avenue,  New York,  New York 10172.
     Offshore II has a business address c/o John B.  Gorsirawig,  14 Willemsted,
     Curacao,  Netherlands Antilles.  Each of the DLJ Stockholders is affiliated
     with  Donaldson,   Lufkin  &  Jenrette,  Inc.,  a  publicly  held  Delaware
     corporation.  The  foregoing  is based on a Schedule 13D filed on behalf of
     the DLJ Stockholders with the Securities and Exchange Commission.

(17) The Greenwich  Stockholders are Greenwich Street Capital Partners II, L.P.,
     a Delaware limited partnership,  GSCP Offshore Fund, L.P., a Cayman Islands
     exempted  limited  partnership,  Greenwich Fund,  L.P., a Delaware  limited
     partnership,  Greenwich  Street  Employees Fund,  L.P., a Delaware  limited
     partnership, TRV Executive Fund, L.P., a Delaware limited partnership. Each
     of the Greenwich  Stockholders  has a business address c/o Greenwich Street
     Investment  II,  L.L.C.,  388 Greenwich  Street,  New York, New York 10013,
     which is the general partner of each of the Greenwich-Stockholders.  Alfred
     C. Eckert III, Keith W. Abell and Sanjay H. Patel are the managing  members
     of Greenwich  Street  Investment  II,  L.L.C.  The  foregoing is based on a
     Schedule  13D  filed  on  behalf  of the  Greenwich  Stockholders  with the
     Securities and Exchange Commission.

(18) Includes  9,231,868  shares of common  stock and  350,000  shares of Senior
     Preferred Stock owned by the Blackstone  Investors.  Mr. Blitzer  disclaims
     beneficial ownership of such shares.

(19) Based on a Schedule 13G filed with the Securities  and Exchange  Commission
     and  dated  September  9, 1999 in which  Capital  Management  and  Research
     Company  states it acts as an  investment  adviser  to  various  investment
     companies registered under the Investment Company Act of 1940 and disclaims
     beneficial ownership of the reported shares.

(20) Includes  166,187  shares  of  common  stock  that may be  acquired  on the
     exercise of options by two executive officers who are not named officers.

(21) Does not include 210,000 shares of Senior Convertible Preferred Stock owned
     by members of the Apollo/Blackstone  Group (the DLJ Investors and GSCP) who
     do not have the right to  representation  on our board of directors.  These
     210,000 shares are subject to an agreement  which requires their holders to
     vote for our  nominees  for  election  to the board.  See  "Agreement  With
     Certain Stockholders."
</FN>
</TABLE>


AGREEMENT WITH CERTAIN STOCKHOLDERS

         Pursuant to an Amended and Restated Shareholders Agreement, dated as of
July 30,  1999 (the  "Shareholders  Agreement"),  between  the  Preferred  Stock
Purchasers and the Apollo/Blackstone Investors and us, we have agreed, until the
earlier to occur of the tenth  anniversary of the Shareholders  Agreement or the
date upon which the Apollo/Blackstone Investors own, collectively, less than 10%
of the shares of common stock acquired from TPG Partners,  L.P., TPG Parallel I,
L.P.  and Laidlaw  Transportation,  Inc.  and the  790,000  shares of the Senior
Convertible Preferred Stock (collectively,  the "Apollo/Blackstone  Shares"), to
nominate  and  support  the  election  to the  Board  of  Directors  of  certain
individuals (the "Shareholder  Designees")  designated by the  Apollo/Blackstone
Investors. For so long as the Apollo/Blackstone  Investors beneficially own: (i)
80% or more of the Apollo/Blackstone Shares, they shall be entitled to designate
five  Shareholder  Designees;  (ii)  60%  or  more  but  less  than  80%  of the
Apollo/Blackstone  Shares,  they shall be entitled to designate four Shareholder
Designees;  (iii) 40% or more but less than 20% of the Apollo/Blackstone Shares,
they shall be entitled to designate  three  Shareholder  Designees;  (iv) 20% or
more but less than 40% of the  Apollo/Blackstone  Shares, they shall be entitled
to designate two Shareholder Designees; and (v) 10% or more but less than 20% of
the   Apollo/Blackstone   Shares,  they  shall  be  entitled  to  designate  one
Shareholder Designee; provided, that if, at any time as a result of our issuance
of voting securities,  the  Apollo/Blackstone  Investors  beneficially own 9% or
less of the  total  voting  power of voting  securities  then  outstanding,  the
Apollo/Blackstone  Investors  shall only be entitled to  designate at most three
Shareholder Designees.  Messrs. Gross, Kaplan,  Ressler,  Lipson and Blitzer are
the Shareholder Designees designated by the Apollo/Blackstone Investors.

                                       27
<PAGE>

         In the  Shareholders  Agreement,  we agreed to: (i) limit the number of
our  executive  officers  that serve on the Board of  Directors to two; and (ii)
nominate  persons to the  remaining  positions on the Board of Directors who are
recommended by the Nominating  Committee and are not our employees,  officers or
outside  counsel or partners,  employees,  directors,  officers,  affiliates  or
associates of any  Apollo/Blackstone  Investors (the "Unaffiliated  Directors").
Unaffiliated  Directors  shall be nominated only upon the approval of a majority
vote of the  Nominating  Committee,  which  will  consist  of not more than four
Directors,  at least two or whom shall be Shareholder Designees,  or such lesser
number of Shareholder Designees as then serves on the Board of Directors. If the
Apollo/Blackstone   Investors   beneficially   own   less   than   50%   of  the
Apollo/Blackstone Shares, the Nominating Committee shall contain only one member
who is a Shareholder Designee.

         In the Shareholders Agreement, each of the Apollo/Blackstone  Investors
and the other Preferred Stock  Purchasers has agreed that,  until the earlier to
occur of the tenth  anniversary of the  Shareholders  Agreement or the date upon
which the Apollo/Blackstone  Investors own,  collectively,  voting securities of
the  Company  which  represent  less than 10% of the total  voting  power of all
voting securities on a fully diluted basis, such Apollo/Blackstone  Investor and
its affiliates and each other  Preferred  Stock  Purchaser shall vote all voting
securities beneficially owned by such persons to elect the individuals nominated
to the Board of Directors in accordance with the  appropriate  provisions of the
Shareholders Agreement.


CERTAIN FINANCIAL INFORMATION

         We have filed  with the  Securities  and  Exchange  Commission  certain
financial  statements  for Allied Waste and  Browning-Ferris  and  unaudited pro
forma financial  statements for Allied Waste giving effect to the acquisition of
Browing-Ferris in a Current Report on Form 8-K filed on September 14, 1999. This
Form 8-K is  incorporated  by reference into this proxy statement and copies may
be  obtained  free of  charge  as set  forth  under  "Incorporation  of  Certain
Documents by Reference."

                                       28
<PAGE>

                       WHERE YOU CAN FIND MORE INFORMATION

         We are  subject to the  informational  requirements  of the  Securities
Exchange Act of 1934. We file reports,  proxy  statements and other  information
with the SEC. You may read and copy such  reports,  proxy  statements  and other
information  at the SEC's Public  Reference  Section at 450 Fifth Street,  N.W.,
Washington,  D.C.  20549.  You may obtain  information  on the  operation of the
Public  Reference  Room by  calling  the  SEC at  1-800-SEC-0330.  The SEC  also
maintains an Internet  website,  located at  http://www.sec.gov,  that  contains
reports,  proxy statements and other information regarding registrants that file
electronically with the SEC.

         You may also read  reports,  proxy  statements  and  other  information
relating  to Allied  Waste and  Browning-Ferris  at the  offices of the New York
Stock Exchange at 20 Broad Street, New York, New York 10005.

                 INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

         We hereby  incorporate  by  reference  into this  proxy  statement  the
following  documents that we have filed with the SEC: (1) our Annual Report,  as
amended,  on Form 10-K/A for the year ended December 31, 1998; (2) our Quarterly
Reports on Form 10-Q for the periods ended March 31, 1999 and June 30, 1999; (3)
our Proxy Statement for our Annual Meeting of Stockholders held on May 26, 1999;
and (4) our Current  Reports on Form 8-K filed on March 16, 1999, July 19, 1999,
August 10, 1999, and September 14, 1999.

         All documents and reports filed by us pursuant to Section 13(a), 13(c),
14, or 15(d) of the Securities Exchange Act of 1934 after the date of this proxy
statement  and on or prior to the date of the  special  meeting are deemed to be
incorporated  by  reference in this proxy  statement  from the date of filing of
such documents or reports. Any statement contained in a document incorporated or
deemed to be incorporated by reference in this proxy statement will be deemed to
be modified or  superseded  for  purposes of this proxy  statement to the extent
that a statement  contained herein or in any other  subsequently  filed document
which  also is or is  deemed  to be  incorporated  by  reference  in this  proxy
statement  modifies or supersedes such  statement.  Any statement so modified or
superseded will not be deemed, except as so modified or superseded, to contain a
part of this proxy statement.

         Any person receiving a copy of this proxy statement may obtain, without
charge,  upon  written  or  oral  request,  a  copy  of  any  of  the  documents
incorporated by reference  except for the exhibits to such documents (other than
the exhibits  expressly  incorporated in such documents by reference).  Requests
should  be  directed   to:   Allied   Waste   Industries,   Inc.,   15880  North
Greenway-Hayden Loop, Suite 100, Scottsdale, Arizona 85260, Attention: Assistant
Corporate Secretary (telephone number 480-627-2700).  A copy will be provided by
first class mail or other  equally  prompt  means  within one business day after
receipt of your request.

         We have  authorized no one to give you any  information  or to make any
representation  about the special  meeting or our company  that  differs from or
adds to the  information  contained in this document or in the documents we have
publicly filed with the SEC. Therefore,  if anyone should give you any different
or additional information, you should not rely on it.

                                       29
<PAGE>

         The  information  contained in this document speaks only as of the date
of this document unless the information specifically indicates that another date
applies.


MISCELLANEOUS MATTERS

         Any  stockholder  who  wishes to  submit a  proposal  for  action to be
included in the proxy  statement  and form of proxy  relating to our 2000 Annual
Meeting of  stockholders is required to submit such proposals to us on or before
December 31, 1999.

                                        By Order of the Board of Directors,

                                        /s/ Thomas H. Van Weelden
                                        Thomas H. Van Weelden
                                        Chairman of the Board,
                                        President and
                                        Chief Executive Officer




                                       30
<PAGE>



                                    Exhibit A
                            1991 Incentive Stock Plan

Existing Section Regarding Stock Subject to Plan

3.       Stock Subject to the Plan

         Under the Plan,  the Committee may grant to  Participants  (a) Options,
(b) shares of Restricted  Stock, (c) Performance  Awards,  (d) shares of Phantom
Stock, (e) Stock Bonuses and (f) Cash Bonuses.

         The  Committee  may  grant   Options,   shares  of  Restricted   Stock,
Performance  Awards,  shares of Phantom  Stock and Stock  Bonuses under the Plan
with respect to a number of shares of Common Stock that in the  aggregate at any
time does not exceed 7.5% of the shares of Common Stock  issued and  outstanding
as reflected on the  Company's  stock  transfer  records on the final day of the
previous fiscal quarter, subject to adjustment pursuant to Section 12. The grant
of a Cash  Bonus  shall not  reduce  the  number of shares of Common  Stock with
respect to which Options,  shares of Restricted Stock,  shares of Phantom Stock,
shares granted as a Performance  Award, or Stock Bonuses may be granted pursuant
to the Plan.

         If any outstanding  Option  expires,  terminates or is canceled for any
reason,  the shares of Common Stock subject to the  unexercised  portion of such
Option  shall  again be  available  for grant  under the Plan.  If any shares of
Restricted  Stock or Phantom  Stock,  or any shares of Common Stock granted as a
Performance  Award or a Stock Bonus are  forfeited  or canceled  for any reason,
such shares shall again be available for grant under the Plan.

         Shares of Common Stock issued under the Plan may be either newly issued
or treasury shares, at the discretion of the Committee.

Proposed Amendment to Section (changed language in italics)

3.       Stock Subject to the Plan

         Under the Plan,  the Committee may grant to  Participants  (a) Options,
(b) shares of Restricted  Stock, (c) Performance  Awards,  (d) shares of Phantom
Stock, (e) Stock Bonuses and (f) Cash Bonuses.

         The  Committee  may  grant   Options,   shares  of  Restricted   Stock,
Performance  Awards,  shares of Phantom  Stock and Stock  Bonuses under the Plan
with respect to a number of shares of Common Stock that in the  aggregate at any
time  does  not  exceed  8.5% of the  Fully  Diluted  Shares  as of the date any
Incentive  Award is granted,  subject to adjustment  pursuant to Section 12. The
grant of a Cash Bonus shall not reduce the number of shares of Common Stock with
respect to which Options,  shares of Restricted Stock,  shares of Phantom Stock,
shares granted as a Performance  Award, or Stock Bonuses may be granted pursuant
to the Plan.

                                       31
<PAGE>

         If any outstanding  Option  expires,  terminates or is canceled for any
reason,  the shares of Common Stock subject to the  unexercised  portion of such
Option  shall  again be  available  for grant  under the Plan.  If any shares of
Restricted  Stock or Phantom  Stock,  or any shares of Common Stock granted as a
Performance  Award or a Stock Bonus are  forfeited  or canceled  for any reason,
such shares shall again be available for grant under the Plan.

         Shares of Common Stock issued under the Plan may be either newly issued
or treasury shares, at the discretion of the Committee.

         [The Incentive  Stock Plan provides that "Fully  Diluted  Shares" means
the aggregate of all issued and  outstanding  shares of Common Stock,  shares of
Common  Stock  issuable  upon the  vesting or payment of awards or  exercise  of
options under any employee  benefit plan,  including the Plan,  shares of Common
Stock otherwise available or reserved for issuance under employee benefit plans,
including  the Plan,  and shares of Common Stock  issuable  upon  conversion  or
exercise of any outstanding  convertible  securities,  warrants or options.  For
these purposes, shares of Series A Senior Convertible Preferred Stock are deemed
convertible into shares of Common Stock.]




                                       32
<PAGE>


                          ALLIED WASTE INDUSTRIES, INC.
          PROXY FOR SPECIAL MEETING OF STOCKHOLDERS [OCTOBER] ___, 1999

         The  undersigned  hereby appoints Thomas H. Van Weelden and Steven Helm
as Proxies, each with the power to appoint his substitute, and hereby authorizes
them to  represent  and vote,  as  designated  on the reverse side of this proxy
card,  all  shares  of  Common  Stock of  Allied  Waste  Industries,  Inc.  (the
"Company")  held of record by the  undersigned  on September  27,  1999,  at the
Special  Meeting  of  Stockholders  to be held on  [October]  __,  1999,  or any
adjournment thereof.

(CONTINUED AND TO BE SIGNED ON THE REVERSE SIDE)


<PAGE>


                         PLEASE DATE, SIGN AND MAIL YOUR
                      PROXY CARD BACK AS SOON AS POSSIBLE!
                         SPECIAL MEETING OF STOCKHOLDERS
                          ALLIED WASTE INDUSTRIES, INC.

                               [October] __, 1999

               --Please Detach and Mail in the Envelope Provided--

         PLEASE MARK YOUR

         A /x/ VOTES AS IN THIS

         EXAMPLE.

1.       Proposal to approve the  issuance of common  stock upon  conversion  of
         shares of Series A Senior Convertible Preferred Stock if the holders of
         Series A Senior  Convertible  Preferred  Stock choose to convert  their
         shares.


FOR - - - - - [    ]     AGAINST - - - - - [    ]   ABSTAIN - - - - - [    ]

2. Proposal to amend the 1991 Incentive Stock Plan.

FOR - - - - - [    ]     AGAINST - - - - - [    ]   ABSTAIN - - - - - [    ]


         --------------------------------
THIS  PROXY  IS  SOLICITED  ON  BEHALF OF THE BOARD OF DIRECTORS OF THE COMPANY.
THIS PROXY WILL BE VOTED AS DIRECTED.  IN THE ABSENCE OF  DIRECTION,  THIS PROXY
WILL BE VOTED FOR THE PROPOSAL.

STOCKHOLDERS ARE URGED TO DATE, MARK, SIGN AND RETURN THIS PROXY PROMPTLY IN THE
ENVELOPE PROVIDED, WHICH REQUIRES NO POSTAGE IF MAILED WITHIN THE UNITED STATES.


SIGNATURE(S)                                 DATE
- -----------------------------------          -----------------------------------

     NOTE: Please sign exactly as name or names hereon. Joint owners should each
sign. When signing as attorney,  executor,  administrator,  trustee or guardian,
please give full title as such.

                                       33
<PAGE>




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