EXHIBIT 10.30
                              EMPLOYMENT AGREEMENT

      This EMPLOYMENT AGREEMENT (the "Agreement") is made and entered into on
this ____ day of July, 2002, by and between Wheelabrator Technologies, Inc. (the
"Company"), and Drennan Lowell (the "Executive"). The Company is an indirect
subsidiary of Waste Management, Inc. ("WMI")

      1.    EMPLOYMENT.

      The Company shall employ Executive, and Executive shall be employed by the
Company upon the terms and subject to the conditions set forth in this
Agreement.

      2.    TERM OF EMPLOYMENT.

      The period of Executive's employment under this Agreement shall commence
on May 14, 2001 ("Employment Date"), and shall continue for a period of two (2)
years thereafter, and shall automatically be renewed for successive one (1) year
periods thereafter, unless Executive's employment is terminated in accordance
with Section 5 below. The period during which Executive is employed hereunder
shall be referred to as the "Employment Period."

      3.    DUTIES AND RESPONSIBILITIES.

      (a) Executive shall serve as President of Wheelabrator Technologies, Inc.
In such capacity, Executive shall perform such duties and have the power,
authority, and functions commensurate with such position in similarly-sized
public companies, and have and possess such other authority and functions
consistent with such position as may be assigned to Executive from time to time
by the Chief Executive Officer of WMI.

      (b) Executive shall devote substantially all of his working time,
attention and energies to the business of the Company, and its affiliated
entities. Executive may make and manage his personal investments (provided such
investments in other activities do not violate, in any material respect, the
provisions of Section 8 of this Agreement), be involved in charitable and
professional activities, and, with the prior written consent of the WMI Board of
Directors, serve on boards of other for profit entities, provided such
activities do not materially interfere with the performance of his duties
hereunder.

      4.    COMPENSATION AND BENEFITS.

      (a) BASE SALARY. During the Employment Period, the Company shall pay
Executive a base salary at the annual rate of Two Hundred Fifty Thousand and
00/100ths Dollars ($250,000.00) per year, or such higher rate as may be
determined from time to time by the Company ("Base Salary"). Such Base Salary
shall be paid in accordance with the Company's standard payroll practice for its
executive officers. Once increased, Base Salary shall not be reduced.



      (b) ANNUAL BONUS. During the Employment Period, Executive will be entitled
to participate in an annual incentive compensation plan of the Company, as
established by the Compensation Committee of the Board from time to time. The
Executive's target annual bonus will be Seventy-Five percent (75%) of his Base
Salary in effect for such year (the "Target Bonus"), and his actual annual bonus
may range from 0% to 150% (two times target) and will be determined based upon
(i) the achievement of certain WMI and Company performance goals, as may be
established and approved by from time to time by the Compensation Committee of
the WMI Board of Directors, and (ii) the achievement of personal performance
goals as may be established by WMI's Chief Executive Officer.

      (c) STOCK OPTIONS. Executive shall be eligible to be considered for stock
option grants under the Waste Management, Inc.'s annual stock option award
program as administered by, and at the sole discretion of, the Compensation
Committee of the WMI Board of Directors.

      (d) BENEFIT PLANS AND VACATION. Subject to the terms of such plans,
Executive shall be eligible to participate in or receive benefits under any
pension plan, profit sharing plan, salary deferral plan, medical and dental
benefits plan, life insurance plan, short-term and long-term disability plans,
or any other health, welfare or fringe benefit plan, generally made available to
similarly-situated WMI executive employees. Neither WMI nor the Company shall be
obligated to institute, maintain, or refrain from changing, amending, or
discontinuing any benefit plan, or perquisite, so long as such changes are
similarly applicable to similarly-situated employees generally.

      During the Employment Period, Executive shall be entitled to vacation each
year in accordance with the Company's policies in effect from time to time, but
in no event less than four (4) weeks paid vacation per calendar year.

      (e) EXPENSE REIMBURSEMENT. The Company shall promptly reimburse Executive
for the ordinary and necessary business expenses incurred by Executive in the
performance of the duties hereunder in accordance with the Company's customary
practices applicable to its executive officers.

      (i)   (f) OTHER PERQUISITES. Executive shall be entitled to all
            perquisites provided to Senior Vice Presidents of WMI as approved by
            the Compensation Committee of the WMI Board of Directors, and as
            they may exist from time to time.

      5.    TERMINATION OF EMPLOYMENT.

      Executive's employment hereunder may be terminated during the Employment
Period under the following circumstances:

      (a) DEATH. Executive's employment hereunder shall terminate upon
Executive's death.

      (b) TOTAL DISABILITY. The Company may terminate Executive's employment
hereunder upon Executive becoming "Totally Disabled." For purposes of this
Agreement, Executive shall be considered "Totally Disabled" if Executive has
been physically or mentally

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incapacitated so as to render Executive incapable of performing the essential
functions of Executive's position with or without reasonable accommodation.
Executive's receipt of disability benefits under the Company's long-term
disability plan or receipt of Social Security disability benefits shall be
deemed conclusive evidence of Total Disability for purpose of this Agreement;
provided, however, that in the absence of Executive's receipt of such long-term
disability benefits or Social Security benefits, WMI's Board of Directors may,
in their reasonable discretion (but based upon appropriate medical evidence),
determine that Executive is Totally Disabled.

      (c) TERMINATION BY THE COMPANY FOR CAUSE. The Company may terminate
Executive's employment hereunder for "Cause" at any time after providing a
Notice of Termination for Cause to Executive.

      (i)   For purposes of this Agreement, the term "Cause" means any of the
            following: (A) willful or deliberate and continual refusal to
            perform Executive's employment duties reasonably requested by the
            Company after receipt of written notice to Executive of such failure
            to perform, specifying such failure (other than as a result of
            Executive's sickness, illness or injury) and Executive fails to cure
            such nonperformance within ten (10) days of receipt of said written
            notice; (B) breach of any statutory or common law duty of loyalty to
            the Company; (C) has been convicted of, or pleaded nolo contendre
            to, any felony; (D) willfully or intentionally caused material
            injury to the Company, its property, or its assets; (E) disclosed to
            unauthorized person(s) proprietary or confidential information of
            the Company; or (F) breach of any of the covenants set forth in
            Section 8 hereof.

      (ii)  For purposes of this Agreement, the phrase "Notice of Termination
            for Cause" shall mean a written notice that shall indicate the
            specific termination provision in Section 5(c)(i) relied upon, and
            shall set forth in reasonable detail the facts and circumstances
            which provide the basis for termination for Cause. Further, a
            Notification of Termination for Cause shall be required to include a
            copy of a resolution duly adopted by at least two-thirds (2/3) of
            the entire membership of the WMI Board of Directors at a meeting of
            the Board which was called for the purpose of considering such
            employment termination, and at which Executive and his
            representative had the right to attend and address the Board,
            finding that, in the good faith belief of the Board, Executive
            engaged in conduct set forth in Section 5(c)(i) herein and
            specifying the particulars thereof in reasonable detail. The date of
            termination for Cause shall be the date indicated in the Notice of
            Termination for Cause. Any purported termination for Cause which is
            held by an arbitrator not to have been based on the grounds set
            forth in this Agreement or not to have followed the procedures set
            forth in this Agreement shall be deemed a termination by the Company
            without Cause.

      (d) VOLUNTARY TERMINATION BY EXECUTIVE. Executive may terminate his
employment hereunder with or without Good Reason at any time upon written notice
to the Company.

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      (i)   A termination for "Good Reason" means a resignation of employment by
            Executive by written notice ("Notice of Termination for Good
            Reason") given to WMI's Chief Executive Officer within ninety (90)
            days after the occurrence of the Good Reason event, unless such
            circumstances are substantially corrected prior to the date of
            termination specified in the Notice of Termination for Good Reason.
            For purposes of this Agreement, "Good Reason" shall mean the
            occurrence or failure to cause the occurrence, as the case may be,
            without Executive's express written consent, of any of the following
            circumstances: (A) the Company substantially changes Executive's
            core duties or removes Executive's responsibility for those core
            duties, so as to effectively cause Executive to no longer be
            performing the duties of his position (except in each case in
            connection with the termination of Executive's employment for Cause
            or Total Disability or as a result of Executive's death, or
            temporarily as a result of Executive's illness or other absence);
            provided that the change in the geographic area of Executive's
            responsibility or the change in reporting structure shall not
            constitute Good Reason under any circumstances; further provided
            that if the Company becomes a fifty percent or more subsidiary of
            any other entity, or merges with, transfers assets to, or the
            business is otherwise transferred to a third party (which may be
            owned in whole or part by WMI), Executive shall be deemed to have a
            substantial change in the core duties of his position unless he is
            also Senior Vice-President of WMI or such other successor entity and
            retains the core duties and responsibilities of his existing
            position; (B) other than as contemplated by (A) above, removal or
            the non-reelection of the Executive from the officer position with
            the Company specified herein, or removal of the Executive from any
            of his then officer positions; (C) any material breach by the
            Company of any provision of this Agreement, including without
            limitation Section 10 hereof; (D) failure of any successor to the
            Company or to WMI (whether direct or indirect and whether by merger,
            acquisition, consolidation or otherwise) to assume in a writing
            delivered to Executive upon the assignee becoming such, the
            obligations of the Company hereunder; or (E) the reassignment of
            Executive to a geographic location more than fifty (50) miles from
            his current business office location.

      (ii)  A "Notice of Termination for Good Reason" shall mean a notice that
            shall indicate the specific termination provision relied upon and
            shall set forth in reasonable detail the facts and circumstances
            claimed to provide a basis for Termination for Good Reason. The
            failure by Executive to set forth in the Notice of Termination for
            Good Reason any facts or circumstances which contribute to the
            showing of Good Reason shall not waive any right of Executive
            hereunder or preclude Executive from asserting such fact or
            circumstance in enforcing his rights hereunder. The Notice of
            Termination for Good Reason shall provide for a date of termination
            not less than ten (10) nor more than sixty (60) days after the date
            such Notice of Termination for Good Reason is given, provided that
            in the case of the events set forth in Sections 5(d)(i)(A) or (B),
            the date may be five (5) business days after the giving of such
            notice.

      (e) TERMINATION BY THE COMPANY WITHOUT CAUSE. The Company may terminate
Executive's employment hereunder without Cause at any time upon written notice
to Executive.

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      (f) EFFECT OF TERMINATION. Upon any termination of employment for any
reason, Executive shall immediately resign from all Board memberships and other
positions with the Company or any of its subsidiaries held by him at such time.

      6.    COMPENSATION FOLLOWING TERMINATION OF EMPLOYMENT.

      In the event that Executive's employment hereunder is terminated,
Executive shall be entitled to the compensation and benefits upon such
termination:

      (a) TERMINATION BY REASON OF DEATH. In the event that Executive's
employment is terminated by reason of Executive's death, the Company shall pay
the following amounts to Executive's beneficiary or estate:

      (i)   Any accrued but unpaid Base Salary for services rendered to the date
            of death, any accrued but unpaid expenses required to be reimbursed
            under this Agreement, any vacation accrued to the date of
            termination, any earned but unpaid bonuses for any prior calendar
            year, and, to the extent not otherwise paid, a pro-rata bonus or
            incentive compensation payment for the current calendar year to the
            extent payments are awarded to senior executives of WMI and paid at
            the same time as senior executives are paid.

      (ii)  Any benefits to which Executive may be entitled pursuant to the
            plans, policies and arrangements (including those referred to in
            Section 4(d) hereof), as determined and paid in accordance with the
            terms of such plans, policies and arrangements.

      (iii) An amount equal to the Base Salary (at the rate in effect as of the
            date of Executive's death) which would have been payable to
            Executive if Executive had continued in employment for two
            additional years. Said payments will be paid to Executive's estate
            or beneficiary at the same time and in the same manner as such
            compensation would have been paid if Executive had remained in
            active employment.

      (iv)  As of the date of termination by reason of Executive's death, stock
            options previously awarded to Executive as of the date of death
            shall be fully vested, and Executive's estate or beneficiary shall
            have up one (1) year from the date of death to exercise all such
            previously-awarded options, provided that in no event will any
            option be exercisable beyond its term. No stock options contemplated
            by this Agreement, but not yet awarded to Executive as of the time
            of his death, shall be granted.

      (b) TERMINATION BY REASON OF TOTAL DISABILITY. In the event that
Executive's employment is terminated by reason of Executive's Total Disability
as determined in accordance with Section 5(b), the Company shall pay the
following amounts to Executive:

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      (i)   Any accrued but unpaid Base Salary for services rendered to the date
            of termination, any accrued but unpaid expenses required to be
            reimbursed under this Agreement, any vacation accrued to the date of
            termination, and any earned but unpaid bonuses for any prior
            calendar year. Executive shall also be eligible for a pro-rata bonus
            or incentive compensation payment to the extent such awards are made
            to senior executives of WMI for the year in which Executive is
            terminated, and to the extent not otherwise paid to the Executive.

      (ii)  Any benefits to which Executive may be entitled pursuant to the
            plans, policies and arrangements (including those referred to in
            Section 4(d) hereof) shall be determined and paid in accordance with
            the terms of such plans, policies and arrangements.

      (iii) An amount equal to the Base Salary (at the rate in effect as of the
            date of Executive's Total Disability) which would have been payable
            to Executive if Executive had continued in active employment for two
            years following termination of employment, less any payments under
            any long-term disability plan or arrangement paid for by the
            Company. Payment shall be made at the same time and in the same
            manner as such compensation would have been paid if Executive had
            remained in active employment until the end of such period.

      (iv)  As of the date of termination by reason of Executive's Total
            Disability, stock options previously awarded to Executive as of the
            date of termination shall be fully vested, and Executive or his
            legal guardian shall have up to one (1) year from the date of death
            to exercise all such previously-awarded options, provided that in no
            event will any option be exercisable beyond its term. No stock
            options contemplated by this Agreement, but not yet awarded to
            Executive as of the time of his employment termination, shall be
            granted.

      (c) TERMINATION FOR CAUSE. In the event that Executive's employment is
terminated by the Company for Cause, the Company shall pay the following amounts
to Executive:

      (i)   Any accrued but unpaid Base Salary for services rendered to the date
            of termination, any accrued but unpaid expenses required to be
            reimbursed under this Agreement, any vacation accrued to the date of
            termination, and any earned but unpaid bonuses for any prior period.

      (ii)  Any benefits to which Executive may be entitled pursuant to the
            plans, policies and arrangements (including those referred to in
            Section 4(d) hereof up to the date of termination) shall be
            determined and paid in accordance with the terms of such plans,
            policies and arrangements.

      (iii) All options, whether vested or not vested prior to the date of such
            termination of employment, shall be automatically cancelled on the
            date of employment termination. However, it is expressly understand
            and agreed that Executive would have no obligation to repay or
            otherwise reimburse the Company for funds

                                       6



            received as a result of Executive's having exercised any
            previously-vested stock options prior to his employment termination.

      (d) VOLUNTARY TERMINATION BY EXECUTIVE. In the event that Executive
voluntarily terminates employment other than for Good Reason, the Company shall
pay the following amounts to Executive:

      (i)   Any accrued but unpaid Base Salary for services rendered to the date
            of termination, any accrued but unpaid expenses required to be
            reimbursed under this Agreement, any vacation accrued to the date of
            termination, and any earned but unpaid bonuses for any prior period.

      (ii)  Any benefits to which Executive may be entitled pursuant to the
            plans, policies and arrangements (including those referred to in
            Section 4(d) hereof up to the date of termination) shall be
            determined and paid in accordance with the terms of such plans,
            policies and arrangements.

      (iii) Any stock options that have not vested prior to the date of such
            termination of employment shall be automatically cancelled as of
            that date, and Executive shall have ninety (90) days following the
            date of termination of employment to exercise any previously vested
            options; provided that in no event will any option be exercisable
            beyond its term. No stock options contemplated by this Agreement,
            but not yet awarded to Executive as of the time of his employment
            termination, shall be granted.

      (e) TERMINATION BY THE COMPANY WITHOUT CAUSE; TERMINATION BY EXECUTIVE FOR
GOOD REASON. In the event that Executive's employment is terminated by the
Company for reasons other than death, Total Disability or Cause, or Executive
terminates his employment for Good Reason, the Company shall pay the following
amounts to Executive:

      (i)   Any accrued but unpaid Base Salary for services rendered to the date
            of termination, any accrued but unpaid expenses required to be
            reimbursed under this Agreement, any vacation accrued to the date of
            termination, and any earned but unpaid bonuses for any prior period.

      (ii)  Any benefits to which Executive may be entitled pursuant to the
            plans, policies and arrangements referred to in Section 4(d) hereof
            shall be determined and paid in accordance with the terms of such
            plans, policies and arrangements.

      (iii) An amount equal to two times the sum of Executive's Base Salary plus
            his Target Annual Bonus (in each case, as then in effect), of which
            one-half shall be paid in a lump sum within ten (10) days after such
            termination and one-half shall be paid during the two (2) year
            period beginning on the date of Executive's termination and shall be
            paid at the same time and in the same manner as Base Salary would
            have been paid if Executive had remained in active employment until
            the end of such period.

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      (iv)  The Company at its expense will continue for Executive and
            Executive's spouse and dependents, all health benefit plans,
            programs or arrangements, whether group or individual, disability,
            and other benefit plans, in which Executive was entitled to
            participate at any time during the twelve-month period prior to the
            date of termination, until the earliest to occur of (A) two years
            after the date of termination; (B) Executive's death (provided that
            benefits provided to Executive's spouse and dependents shall not
            terminate upon Executive's death); or (C) with respect to any
            particular plan, program or arrangement, the date Executive becomes
            eligible to participate in a comparable benefit provided by a
            subsequent employer. In the event that Executive's continued
            participation in any such Company plan, program, or arrangement is
            prohibited, the Company will arrange to provide Executive with
            benefits substantially similar to those which Executive would have
            been entitled to receive under such plan, program, or arrangement,
            for such period on a basis which provides Executive with no
            additional after tax cost.

      (v)   Executive shall continue to vest in all stock option awards or
            restricted stock awards over the two (2) year period commencing on
            the date of such termination. Executive shall have two (2) years and
            six (6) months after the date of termination to exercise all options
            to the extent then vested, provided that in no event may any option
            be exercisable beyond its term.

      (f) NO OTHER BENEFITS OR COMPENSATION. Except as may be provided under
this Agreement, under the terms of any incentive compensation, employee benefit,
or fringe benefit plan applicable to Executive at the time of Executive's
termination or resignation of employment, Executive shall have no right to
receive any other compensation, or to participate in any other plan, arrangement
or benefit, with respect to future periods after such termination or
resignation.

      (g)   NO MITIGATION; NO SET-OFF. In the event of any termination of
            employment hereunder, Executive shall be under no obligation to seek
            other employment and there shall be no offset against any amounts
            due Executive under this Agreement on account of any remuneration
            attributable to any subsequent employment that Executive may obtain.
            The amounts payable hereunder shall not be subject to setoff,
            counterclaim, recoupment, defense or other right which the Company
            may have against the Executive or others, except upon obtaining by
            the Company of a final non-appealable judgment against Executive.

      7. RESIGNATION BY EXECUTIVE FOR GOOD REASON AND COMPENSATION PAYABLE
FOLLOWING CHANGE IN CONTROL PERIOD.

      (a) RESIGNATION FOR GOOD REASON FOLLOWING CHANGE IN CONTROL. In the event
a "Change in Control" occurs and Executive terminates his employment for Good
Reason thereafter, or the Company terminates Executive's employment other than
for Cause (any termination within six (6) months prior to such Change in Control
being presumed to be in contemplation unless rebutted by clear and demonstrable
evidence to the contrary), the Company shall pay the following amounts to
Executive:

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      (i)   The payments and benefits provided for in Section 6(e), except that
            (A) the amount and period with respect to which severance is
            calculated pursuant to Section 6(e)(iii) will be three (3) years and
            the amount shall be paid in a lump-sum and (B) the benefit
            continuation period in Section 6(e)(iv) shall be for three (3)
            years.

      (ii)  In lieu of Section 6(e)(v), Executive will be 100% vested in all
            benefits, awards, and grants (including stock option grants and
            stock awards, all of such stock options exercisable for three (3)
            years following Termination, provided that in no event will any
            option be exercisable beyond its term) accrued but unpaid as of the
            date of termination under any non-qualified pension plan,
            supplemental and/or incentive compensation or bonus plans, in which
            Executive was a participant as of the date of termination. Executive
            shall also receive a bonus or incentive compensation payment (the
            "bonus payment"), payable at 100% of the maximum bonus available to
            Executive, pro-rated as of the effective date of the termination.
            The bonus payment shall be payable within five (5) days after the
            effective date of Executive's termination. Except as may be provided
            under this Section 7 or under the terms of any incentive
            compensation, employee benefit, or fringe benefit plan applicable to
            Executive at the time of Executive's termination of employment,
            Executive shall have no right to receive any other compensation, or
            to participate in any other plan, arrangement or benefit, with
            respect to future periods after such resignation or termination.

      (b)   CERTAIN ADDITIONAL PAYMENTS BY THE COMPANY.

      (i)   In the event that the Executive shall become entitled to payments
            and/or benefits provided by this Agreement or any other amounts in
            the "nature of compensation" (whether pursuant to the terms of this
            Agreement or any other plan, arrangement or agreement with the
            Company, any person whose actions result in a change of ownership or
            effective control covered by Section 280G(b)(2) of the Code or any
            person affiliated with the Company or such person) as a result of
            such change in ownership or effective control (collectively the
            "Company Payments"), and such Company Payments will be subject to
            the tax (the "Excise Tax") imposed by Section 4999 of the Code (and
            any similar tax that may hereafter be imposed by any taxing
            authority) the Company shall pay to the Executive at the time
            specified in subsection (iv) below an additional amount (the
            "Gross-up Payment") such that the net amount retained by the
            Executive, after deduction of any Excise Tax on the Company Payments
            and any U.S. federal, state, and for local income or payroll tax
            upon the Gross-up Payment provided for by this Section 7(b), but
            before deduction for any U.S. federal, state, and local income or
            payroll tax on the Company Payments, shall be equal to the Company
            Payments.

      (ii)  For purposes of determining whether any of the Company Payments and
            Gross-up Payments (collectively the "Total Payments") will be
            subject to the Excise Tax and the amount of such Excise Tax, (x) the
            Total Payments shall be treated as "parachute payments" within the
            meaning of Section 280G(b)(2) of the Code, and

                                       9



            all "parachute payments" in excess of the "base amount" (as defined
            under Code Section 280G(b)(3) of the Code) shall be treated as
            subject to the Excise Tax, unless and except to the extent that, in
            the opinion of the Company's independent certified public
            accountants appointed prior to any change in ownership (as defined
            under Code Section 280G(b)(2) or tax counsel selected by such
            accountants (the "Accountants") such Total Payments (in whole or in
            part) either do not constitute "parachute payments," represent
            reasonable compensation for services actually rendered within the
            meaning of Section 280G(b)(4) of the Code in excess of the "base
            amount" or are otherwise not subject to the Excise Tax, and (y) the
            value of any non-cash benefits or any deferred payment or benefit
            shall be determined by the Accountants in accordance with the
            principles of Section 280G of the Code.

      (iii) For purposes of determining the amount of the Gross-up Payment, the
            Executive shall be deemed to pay U.S. federal income taxes at the
            highest marginal rate of U.S. federal income taxation in the
            calendar year in which the Gross-up Payment is to be made and state
            and local income taxes at the highest marginal rate of taxation in
            the state and locality of the Executive's residence for the calendar
            year in which the Company Payment is to be made, net of the maximum
            reduction in U.S. federal income taxes which could be obtained from
            deduction of such state and local taxes if paid in such year. In the
            event that the Excise Tax is subsequently determined by the
            Accountants to be less than the amount taken into account hereunder
            at the time the Gross-up Payment is made, the Executive shall repay
            to the Company, at the time that the amount of such reduction in
            Excise Tax is finally determined, the portion of the prior Gross-up
            Payment attributable to such reduction (plus the portion of the
            Gross-up Payment attributable to the Excise Tax and U.S. federal,
            state and local income tax imposed on the portion of the Gross-up
            Payment being repaid by the Executive if such repayment results in a
            reduction in Excise Tax or a U.S. federal, state and local income
            tax deduction), plus interest on the amount of such repayment at the
            rate provided in Section 1274(b)(2)(B) of the Code. Notwithstanding
            the foregoing, in the event any portion of the Gross-up Payment to
            be refunded to the Company has been paid to any U.S. federal, state
            and local tax authority, repayment thereof (and related amounts)
            shall not be required until actual refund or credit of such portion
            has been made to the Executive, and interest payable to the Company
            shall not exceed the interest received or credited to the Executive
            by such tax authority for the period it held such portion. The
            Executive and the Company shall mutually agree upon the course of
            action to be pursued (and the method of allocating the expense
            thereof) if the Executive's claim for refund or credit is denied.

            In the event that the Excise Tax is later determined by the
            Accountant or the Internal Revenue Service to exceed the amount
            taken into account hereunder at the time the Gross-up Payment is
            made (including by reason of any payment the existence or amount of
            which cannot be determined at the time of the Gross-up Payment), the
            Company shall make an additional Gross-up Payment in respect of such
            excess (plus any interest or penalties payable with respect to such
            excess) at the time that the amount of such excess is finally
            determined.

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      (iv)  The Gross-up Payment or portion thereof provided for in subsection
            (iii) above shall be paid not later than the thirtieth (30th) day
            following an event occurring which subjects the Executive to the
            Excise Tax; provided, however, that if the amount of such Gross-up
            Payment or portion thereof cannot be finally determined on or before
            such day, the Company shall pay to the Executive on such day an
            estimate, as determined in good faith by the Accountant, of the
            minimum amount of such payments and shall pay the remainder of such
            payments (together with interest at the rate provided in Section
            1274(b)(2)(B) of the Code), subject to further payments pursuant to
            subsection (iii) hereof, as soon as the amount thereof can
            reasonably be determined, but in no event later than the ninetieth
            day after the occurrence of the event subjecting the Executive to
            the Excise Tax. In the event that the amount of the estimated
            payments exceeds the amount subsequently determined to have been
            due, such excess shall constitute a loan by the Company to the
            Executive, payable on the fifth day after demand by the Company
            (together with interest at the rate provided in Section
            1274(b)(2)(B) of the Code).

      (v)   In the event of any controversy with the Internal Revenue Service
            (or other taxing authority) with regard to the Excise Tax, the
            Executive shall permit the Company to control issues related to the
            Excise Tax (at its expense), provided that such issues do not
            potentially materially adversely affect the Executive, but the
            Executive shall control any other issues. In the event the issues
            are interrelated, the Executive and the Company shall in good faith
            cooperate so as not to jeopardize resolution of either issue, but if
            the parties cannot agree the Executive shall make the final
            determination with regard to the issues. In the event of any
            conference with any taxing authority as to the Excise Tax or
            associated income taxes, the Executive shall permit the
            representative of the Company to accompany the Executive, and the
            Executive and the Executive's representative shall cooperate with
            the Company and its representative.

      (vi)  The Company shall be responsible for all charges of the Accountant.

      (vii) The Company and the Executive shall promptly deliver to each other
            copies of any written communications, and summaries of any verbal
            communications, with any taxing authority regarding the Excise Tax
            covered by this Section 7(b).

      (c) CHANGE IN CONTROL. For purposes of this Agreement, "Change in Control"
means the occurrence of any of the following events:

      (i)   any Person is or becomes the Beneficial Owner, directly or
            indirectly, of securities of WMI (not including in the securities
            beneficially owned by such person any securities acquired directly
            from WMI or its Affiliates) representing twenty-five percent (25%)
            or more of the combined voting power of WMI's then outstanding
            voting securities;

      (ii)  the following individuals cease for any reason to constitute a
            majority of the number of directors then serving: individuals who,
            on the Employment Date, constitute the Board and any

                                       11


            new director (other than a director whose initial assumption of
            office is in connection with an actual or threatened election
            contest, including but not limited to a consent solicitation,
            relating or the election of directors of WMI) whose appointment or
            election by the Board or WMI stockholders was approved or
            recommended by a vote of at least two-thirds (2/3rds) of the
            directors then still in office who either were directors on the
            Employment Date or whose appointment, election or nomination for
            election was previously so approved or recommended (the "Incumbent
            Board");

      (iii) there is a consummated merger or consolidation of the Company
            pursuant to which no securities of the Company are owned by WMI or
            its direct or indirect subsidiaries, or a merger or consolidation of
            WMI or any direct or indirect subsidiary of WMI (other than the
            Company) with any other corporation, other than (1) a merger or
            consolidation which would result in the voting securities of WMI
            outstanding immediately prior thereto continuing to represent
            (either by remaining outstanding or by being converted into voting
            securities of the surviving or parent entity) more than fifty
            percent (50%) of the combined voting power of the voting securities
            of WMI or such surviving or parent entity outstanding immediately
            after such merger or consolidation or (2) a merger or consolidation
            effected to implement a recapitalization of WMI (or similar
            transaction) in which no Person, directly or indirectly, acquired
            twenty-five percent (25%) or more of the combined voting power of
            WMI's then outstanding securities; or

      (iv)  the stockholders of the Company or WMI approve a plan of complete
            liquidation of the Company or WMI or there is consummated an
            agreement for the sale or disposition by the Company or WMI of all
            or substantially all of the Company's or WMI's assets (or any
            transaction having a similar effect), other than a sale or
            disposition by the Company or WMI of all or substantially all of the
            Company's or WMI's assets to an entity, at least fifty percent (50%)
            of the combined voting power of the voting securities of which are
            owned by stockholders of the Company or WMI in substantially the
            same proportions as their ownership of the Company or WMI
            immediately prior to such sale.

      For purposes of this Section 7, the following terms shall have the
      following meanings:

      (i)   "Affiliate" shall mean an affiliate of WMI, as defined in Rule 12b-2
            promulgated under Section 12 of the Securities Exchange Act of 1934,
            as amended from time to time (the "Exchange Act").

      (ii)  "Beneficial Owner" shall have the meaning set fort in Rule 13d-3
            under the Exchange Act;

                                       12


      (iii) "Person" shall have the meaning set forth in Section 3(a)(9) of the
            Exchange Act, as modified and used in Sections 13(d) and 14(d)
            thereof, except that such term shall not include (1) WMI, (2) a
            trustee or other fiduciary holding securities under an employee
            benefit plan of WMI, (3) an underwriter temporarily holding
            securities pursuant to an offering of such securities or (4) a
            corporation owned, directly or indirectly, by the stockholders of
            WMI in substantially the same proportions as their ownership of
            shares of common stock of WMI.

      8.    COVENANTS

      (a) THIS AGREEMENT. The terms of this Agreement constitute Confidential
Information, which Executive shall not disclose to anyone other than Executive's
spouse, attorneys, advisors, or as required by law. Disclosure of these terms is
a material breach of this Agreement and could subject Executive to disciplinary
action, including without limitation, termination of employment for Cause.

      (b) COMPANY PROPERTY. All written materials, records, data, and other
documents prepared or possessed by Executive during Executive's employment with
the Company are the Company's property. All information, ideas, concepts,
improvements, discoveries, and inventions that are conceived, made, developed,
or acquired by Executive individually or in conjunction with others during
Executive's employment (whether during business hours and whether on the
Company's premises or otherwise), which relate to the Company's business,
products, or services are the Company's sole and exclusive property. All
memoranda, notes, records, files, correspondence, drawings, manuals, models,
specifications, computer programs, maps, and all other documents, data, or
materials of any type embodying such information, ideas, concepts, improvements,
discoveries, and inventions are the Company's property. At the termination of
Executive's employment with the Company for any reason, Executive shall return
all of the Company's documents, data, or other Company property to the Company.

      (c) CONFIDENTIAL INFORMATION; NON-DISCLOSURE. Executive acknowledges that
the business of the Company is highly competitive and that the Company has
provided and will continue to provide Executive with access to "Confidential
Information" relating to the business of the Company and its affiliates.

      For purposes of this Agreement, "Confidential Information" means and
includes the Company's and WMI's confidential and/or proprietary information
and/or trade secrets that have been developed or used and/or will be developed
and that cannot be obtained readily by third parties from outside sources.
Confidential Information includes, by way of example and without limitation, the
following information regarding customers, employees, contractors, and the
industry not generally known to the public; strategies, methods, books, records,
and documents; technical information concerning products, equipment, services,
and processes; procurement procedures and pricing techniques; the names of and
other information concerning customers, investors, and business affiliates (such
as contact name, service provided, pricing for that customer, type and amount of
services used, credit and financial data, and/or other information relating to
the Company's relationship with that customer); pricing strategies and price
curves; positions, plans, and strategies for expansion or acquisitions; budgets;
customer lists; research; weather data; financial and sales data; trading
methodologies and terms; evaluations, opinions,

                                       13



and interpretations of information and data; marketing and merchandising
techniques; prospective customers' names and marks; grids and maps; electronic
databases; models; specifications; computer programs; internal business records;
contracts benefiting or obligating the Company; bids or proposals submitted to
any third party; technologies and methods; training methods and training
processes; organizational structure; personnel information, including salaries
of personnel; payment amounts or rates paid to consultants or other service
providers; and other such confidential or proprietary information. Information
need not qualify as a trade secret to be protected as Confidential Information
under this Agreement, and the authorized and controlled disclosure of
Confidential Information to authorized parties by Company in the pursuit of its
business will not cause the information to lose its protected status under this
Agreement. Executive acknowledges that this Confidential Information constitutes
a valuable, special, and unique asset used by the Company or its affiliates in
their businesses to obtain a competitive advantage over their competitors.
Executive further acknowledges that protection of such Confidential Information
against unauthorized disclosure and use is of critical importance to the Company
and its affiliates in maintaining their competitive position.

      Executive has and will continue to have access to, or knowledge of,
Confidential Information of third parties, such as actual and potential
customers, suppliers, partners, joint venturers, investors, financing sources,
and the like, of the Company, Waste Management, Inc. and their affiliates.

      The Company also agrees to provide Executive with one or more of the
following: access to Confidential Information; specialized training regarding
the Company's and WMI's methodologies and business strategies, and/or support in
the development of goodwill such as introductions, information and reimbursement
of customer development expenses consistent with Company policy. The foregoing
is not contingent on continued employment, but is contingent upon Executive's
use of the Confidential Information access, specialized training, and goodwill
support provided by Company for the exclusive benefit of the Company and upon
Executive's full compliance with the restrictions on Executive's conduct
provided for in this Agreement.

      In addition to the requirements set forth in Section 5(c)(i), Executive
agrees that Executive will not after Executive's employment with the Company,
make any unauthorized disclosure of any then Confidential Information or
specialized training of the Company, WMI, or their respective affiliates, or
make any use thereof, except in the carrying out of his employment
responsibilities hereunder. Executive also agrees to preserve and protect the
confidentiality of third party Confidential Information to the same extent, and
on the same basis, as the Company's Confidential Information.

      (d) UNFAIR COMPETITION RESTRICTIONS. Upon Executive's Employment Date, the
Company agrees to and shall provide Executive with immediate access to
Confidential Information. Ancillary to the rights provided to Executive
following employment termination, the Company's provision of Confidential
Information, specialized training, and/or goodwill support to Executive, and
Executive's agreements, regarding the use of same, and in order to protect the
value of the above-referenced stock options, any restricted stock, training,
goodwill support and/or the Confidential Information described above, the
Company and Executive agree to the following provisions against unfair
competition. Executive agrees that for a period of two (2) years following the
termination of employment for any reason ("Restricted Term"),

                                       14



Executive will not, directly or indirectly, for Executive or for others,
anywhere in the United States (including all parishes in Louisiana, and Puerto
Rico) (the "Restricted Area") do the following, unless expressly authorized to
do so in writing by the Chief Executive Officer of the Company:

            Engage in, or assist any person, entity, or business
            engaged in, the selling or providing of products or
            services that would displace the products or services
            that (i) the Company or WMI is currently in the business
            of providing and was in the business of providing, or
            was planning to be in the business of providing, at the
            time Executive was employed with the Company, and (ii)
            that Executive had involvement in or received
            Confidential Information about in the course of
            employment; the foregoing is expressly understood to
            include, without limitation, the business of the
            collection, transfer, recycling and resource recovery,
            or disposal of solid waste, hazardous or other waste,
            including the operation of waste-to-energy facilities.

      It is further agreed that during the Restricted Term, Executive cannot
engage in any of the enumerated prohibited activities in the Restricted Area by
means of telephone, telecommunications, satellite communications,
correspondence, or other contact from outside the Restricted Area. Executive
further understands that the foregoing restrictions may limit his ability to
engage in certain businesses during the Restricted Term, but acknowledges that
these restrictions are necessary to protect the Confidential Information the
Company has provided to Executive.

      A failure to comply with the foregoing restrictions will create a
presumption that Executive is engaging in unfair competition. Executive agrees
that this Section defining unfair competition with the Company or with WMI does
not prevent Executive from using and offering the skills that Executive
possessed prior to receiving access to Confidential Information, confidential
training, and knowledge from the Company. This Agreement creates an advance
approval process, and nothing herein is intended, or will be construed as, a
general restriction against the pursuit of lawful employment in violation of any
controlling state or federal laws. Executive shall be permitted to engage in
activities that would otherwise be prohibited by this covenant if such
activities are determined in the sole discretion of the Chief Executive Officer
of WMI to be no material threat to the legitimate business interests of the
Company or WMI.

      (e) NON-SOLICITATION OF CUSTOMERS. For a period of two (2) years following
the termination of employment for any reason, Executive will not call on,
service, or solicit competing business from customers of the Company, WMI, or
their respective affiliates whom Executive, within the previous twelve (12)
months, (i) had or made contact with, or (ii) had access to information and
files about, or induce or encourage any such customer or other source of ongoing
business to stop doing business with Company or WMI.

      (f) NON-SOLICITATION OF EMPLOYEES. During Executive's employment, and for
a period of two (2) years following the termination of employment for any
reason, Executive will not, either directly or indirectly, call on, solicit,
encourage, or induce any other employee or

                                       15



officer of the Company, WMI, or their respective affiliates whom Executive had
contact with, knowledge of, or association within the course of employment with
the Company to terminate his employment, and will not assist any other person or
entity in such a solicitation.

      (g) NON-DISPARAGEMENT. Executive covenants and agrees that Executive shall
not engage in any pattern of conduct that involves the making or publishing of
written or oral statements or remarks (including, without limitation, the
repetition or distribution of derogatory rumors, allegations, negative reports
or comments) which are disparaging, deleterious or damaging to the integrity,
reputation or good will of the Company, its management, or of management of
corporations affiliated with the Company.

      9.    ENFORCEMENT OF COVENANTS.

      (a) TERMINATION OF EMPLOYMENT AND FORFEITURE OF COMPENSATION. Executive
agrees that any breach by Executive of any of the covenants set forth in Section
8 hereof during Executive's employment by the Company, shall be grounds for
immediate dismissal of Executive for Cause pursuant to Section 5(c)(i), which
shall be in addition to and not exclusive of any and all other rights and
remedies the Company may have against Executive.

      (b) RIGHT TO INJUNCTION. Executive acknowledges that a breach of the
covenants set forth in Section 10 hereof will cause irreparable damage to the
Company and/or WMI with respect to which the Company's remedy at law for damages
will be inadequate. Therefore, in the event of breach or anticipatory breach of
the covenants set forth in this section by Executive, Executive and the Company
agree that the Company and/or WMI shall be entitled to seek the following
particular forms of relief, in addition to remedies otherwise available to it at
law or equity: (A) injunctions, both preliminary and permanent, enjoining or
restraining such breach or anticipatory breach and Executive hereby consents to
the issuance thereof forthwith and without bond by any court of competent
jurisdiction; and (B) recovery of all reasonable sums as determined by a court
of competent jurisdiction expended and costs, including reasonable attorney's
fees, incurred by the Company and/or WMI to enforce the covenants set forth in
this section.

      (c) SEPARABILITY OF COVENANTS. The covenants contained in Section 8 hereof
constitute a series of separate but ancillary covenants, one for each applicable
State in the United States and the District of Columbia, and one for each
applicable foreign country. If in any judicial proceeding, a court shall hold
that any of the covenants set forth in Section 8 exceed the time, geographic, or
occupational limitations permitted by applicable laws, Executive and the Company
agree that such provisions shall and are hereby reformed to the maximum time,
geographic, or occupational limitations permitted by such laws. Further, in the
event a court shall hold unenforceable any of the separate covenants deemed
included herein, then such unenforceable covenant or covenants shall be deemed
eliminated from the provisions of this Agreement for the purpose of such
proceeding to the extent necessary to permit the remaining separate covenants to
be enforced in such proceeding. Executive and the Company further agree that the
covenants in Section 8 shall each be construed as a separate agreement
independent of any other provisions of this Agreement, and the existence of any
claim or cause of action by Executive against the Company whether predicated on
this Agreement or otherwise, shall not constitute a defense to the enforcement
by the Company of any of the covenants of Section 8.

                                       16



      10.   INDEMNIFICATION.

      The Company shall indemnify and hold harmless Executive to the fullest
extent permitted by Delaware law for any action or inaction of Executive while
serving as an officer and director of the Company or, at the Company's request,
as an officer or director of any other entity or as a fiduciary of any benefit
plan. This provision includes the obligation and undertaking of the Executive to
reimburse the Company for any fees advanced by the Company on behalf of the
Executive should it later be determined that Executive was not entitled to have
such fees advanced by the Company under Delaware law. The Company shall cover
the Executive under directors and officers liability insurance both during and,
while potential liability exists, after the Employment Period in the same amount
and to the same extent as the Company covers its other officers and directors.

      11.   DISPUTES AND PAYMENT OF ATTORNEY'S FEES.

      If at any time during the term of this Agreement or afterwards there
should arise any dispute as to the validity, interpretation or application of
any term or condition of this Agreement, the Company agrees, upon written demand
by Executive (and Executive shall be entitled upon application to any court of
competent jurisdiction, to the entry of a mandatory injunction, without the
necessity of posting any bond with respect thereto, compelling the Company) to
promptly provide sums sufficient to pay on a current basis (either directly or
by reimbursing Executive) Executive's costs and reasonable attorney's fees
(including expenses of investigation and disbursements for the fees and expenses
of experts, etc.) incurred by Executive in connection with any such dispute or
any litigation, provided that Executive shall repay any such amounts paid or
advanced if Executive is not the prevailing party with respect to at least one
material claim or issue in such dispute or litigation. The provisions of this
Section 11, without implication as to any other section hereof, shall survive
the expiration or termination of this Agreement and of Executive's employment
hereunder.

      12.   WITHHOLDING OF TAXES.

      The Company may withhold from any compensation and benefits payable under
this Agreement all applicable federal, state, local, or other taxes.

      13.   SOURCE OF PAYMENTS.

      All payments provided under this Agreement, other than payments made
pursuant to a plan which provides otherwise, shall be paid from the general
funds of the Company, and no special or separate fund shall be established, and
no other segregation of assets made, to assure payment. Executive shall have no
right, title or interest whatever in or to any investments which the Company may
make to aid the Company in meeting its obligations hereunder. To the extent that
any person acquires a right to receive payments from the Company hereunder, such
right shall be no greater than the right of an unsecured creditor of the
Company.

                                       17



      14.   ASSIGNMENT.

      Except as otherwise provided in this Agreement, this Agreement shall inure
to the benefit of and be binding upon the parties hereto and their respective
heirs, representatives, successors and assigns. This Agreement shall not be
assignable by Executive (but any payments due hereunder which would be payable
at a time after Executive's death shall be paid to Executive's designated
beneficiary or, if none, his estate) and shall be assignable by the Company only
to any financially solvent corporation or other entity resulting from the
reorganization, merger or consolidation of the Company with any other
corporation or entity or any corporation or entity to or with which the
Company's business or substantially all of its business or assets may be sold,
exchanged or transferred, and it must be so assigned by the Company to, and
accepted as binding upon it by, such other corporation or entity in connection
with any such reorganization, merger, consolidation, sale, exchange or transfer
in a writing delivered to Executive in a form reasonably acceptable to Executive
(the provisions of this sentence also being applicable to any successive such
transaction).

      15.   ENTIRE AGREEMENT; AMENDMENT.

      This Agreement shall supersede any and all existing oral or written
agreements, representations, or warranties between Executive and the Company or
any of its parent, subsidiaries or affiliated entities relating to the terms of
Executive's employment by the Company. It may not be amended except by a written
agreement signed by both parties.

      16.   GOVERNING LAW.

      This Agreement shall be governed by and construed in accordance with the
laws of the State of Texas applicable to agreements made and to be performed in
that State, without regard to its conflict of laws provisions.

      17.   REQUIREMENT OF TIMELY PAYMENTS.

      If any amounts which are required, or determined to be paid or payable, or
reimbursed or reimbursable, to Executive under this Agreement (or any other
plan, agreement, policy or arrangement with the Company) are not so paid
promptly at the times provided herein or therein, such amounts shall accrue
interest, compounded daily, at an 8% annual percentage rate, from the date such
amounts were required or determined to have been paid or payable, reimbursed or
reimbursable to Executive, until such amounts and any interest accrued thereon
are finally and fully paid, provided, however, that in no event shall the amount
of interest contracted for, charged or received hereunder, exceed the maximum
non-usurious amount of interest allowed by applicable law.

      18.   NOTICES.

      Any notice, consent, request or other communication made or given in
connection with this Agreement shall be in writing and shall be deemed to have
been duly given when delivered or mailed by registered or certified mail, return
receipt requested, or by facsimile or by hand delivery, to those listed below at
their following respective addresses or at such other address as

                                       18



each may specify by notice to the others:

           To the Company:        Waste Management , Inc.
                                  1001 Fannin, Suite 4000
                                  Houston, Texas 77002
                                  Attention: Corporate Secretary

           To Executive:          At the address for Executive set forth below.

      19.   MISCELLANEOUS.

      (a) WAIVER. The failure of a party to insist upon strict adherence to any
term of this Agreement on any occasion shall not be considered a waiver thereof
or deprive that party of the right thereafter to insist upon strict adherence to
that term or any other term of this Agreement.

      (b) SEPARABILITY. Subject to Section 9 hereof, if any term or provision of
this Agreement is declared illegal or unenforceable by any court of competent
jurisdiction and cannot be modified to be enforceable, such term or provision
shall immediately become null and void, leaving the remainder of this Agreement
in full force and effect.

      (c) HEADINGS. Section headings are used herein for convenience of
reference only and shall not affect the meaning of any provision of this
Agreement.

      (d) RULES OF CONSTRUCTION. Whenever the context so requires, the use of
the singular shall be deemed to include the plural and vice versa.

      (e) COUNTERPARTS. This Agreement may be executed in any number of
counterparts, each of which so executed shall be deemed to be an original, and
such counterparts will together constitute but one Agreement.

      IN WITNESS WHEREOF, this Agreement is EXECUTED as of the date first set
forth above and effective as set forth therein.

                                  DRENNAN LOWELL
                                  ("Executive")

                                  /s/ J. Drennan Lowell
                                      -----------------------------

                                       19



                                  J. Drennan Lowell

                                  WHEELABRATOR TECHNOLOGIES, INC.
                                  (The "Company")

                                  By: /s/ David P. Steiner
                                      ------------------------------
                                      David P. Steiner
                                      Vice President and Secretary

                                  WASTE MANAGEMENT, INC.

                                  By:  /s/ A. Maurice Myers
                                       ------------------------------
                                      A. Maurice Myers
                                      President and Chief Executive Officer

                                       20



                                 FIRST AMENDMENT
                             TO EMPLOYMENT AGREEMENT

      Wheelabrator Technologies, Inc. (the "Company"), Waste Management, Inc.
("WMI"), and Drennan Lowell (the "Executive") hereby enter into this First
Amendment to Employment Agreement (the "Amendment") as of October 20, 2004, to
hereby amend the Employment Agreement dated July 2002 between the Company and
the Executive (the "Employment Agreement") to restrict the period in which
increased severance benefits related to a possible Change in Control may be
available, as follows:

      1. The first paragraph of Section 6(e) of the Employment Agreement is
hereby amended in its entirety to read as follows:

            "(e) TERMINATION BY THE COMPANY WITHOUT CAUSE OUTSIDE A CHANGE IN
      CONTROL PERIOD; TERMINATION BY EXECUTIVE FOR GOOD REASON OUTSIDE A CHANGE
      IN CONTROL PERIOD. In the event that Executive's employment is terminated
      by the Company outside a Change in Control Period (as defined in Section
      7) for reasons other than death, Total Disability or Cause, or Executive
      terminates his employment for Good Reason outside of a Change in Control
      Period, the Company shall pay the following amounts to Executive:"

      2. The heading of Section 7 of the Employment Agreement is hereby amended
in its entirety to read as follows:

            "7. RESIGNATION BY EXECUTIVE FOR GOOD REASON OR TERMINATION BY
      COMPANY WITHOUT CAUSE DURING A CHANGE IN CONTROL PERIOD."

      3. The first paragraph of Section 7(a) of the Employment Agreement is
hereby amended in its entirety to read as follows:

            "(a) CERTAIN TERMINATIONS DURING A CHANGE IN CONTROL PERIOD. In the
      event a Change in Control occurs and (x) Executive terminates his
      employment for Good Reason during the Change in Control Period, or (y) the
      Company terminates Executive's employment without Cause (and for reason
      other than Death of Total Disability) during the Change in Control Period,
      the Company shall pay the following amounts to Executive:"

      4. Section 7(c) of the Employment Agreement is hereby amended in its
entirety to read as follows:

            "(c) CHANGE IN CONTROL. For purposes of this Agreement, "Change in
      Control" means the first to occur, on or after October 20, 2004, of any of
      the following:

            (i) any Person is or becomes the Beneficial Owner, directly or
            indirectly, of securities of WMI representing twenty-five percent
            (25%) or more of the combined voting power of WMI's then outstanding
            Voting Securities;

            (ii) the following individuals cease for any reason to constitute a

                                       21



            majority of the number of directors then serving: individuals who,
            on the Employment Date, constitute the Board and any new director
            (other than a director whose initial assumption of office is in
            connection with an actual or threatened election contest, including
            but not limited to a consent solicitation, relating or the election
            of directors of WMI) whose appointment or election by the Board or
            nomination for election by WMI's stockholders was approved or
            recommended by a vote of at least two-thirds (2/3rds) of the
            directors then still in office who either were directors on the
            Employment Date or whose appointment, election or nomination for
            election was previously so approved or recommended (the "Incumbent
            Board");

            (iii) there is a consummated merger or consolidation of the Company
            pursuant to which no securities of the Company are owned by WMI or
            its direct or indirect subsidiaries, or a merger or consolidation of
            WMI or any direct or indirect subsidiary of WMI (other than the
            Company) with any other corporation other than (A) a merger or
            consolidation which would result in Voting Securities or WMI
            outstanding immediately prior thereto continuing to represent
            (either by remaining outstanding or by being converted into Voting
            Securities of the surviving or parent entity) more than fifty
            percent (50%) of the combined voting power of the Voting Securities
            of WMI or such surviving or parent entity outstanding immediately
            after such merger or consolidation or (B) a merger or consolidation
            effected to implement a recapitalization of WMI (or similar
            transaction) in which no Person, directly or indirectly, acquired
            twenty-five percent (25%) or more of the combined voting power of
            WMI's then outstanding securities; or

            (iv) the stockholders of WMI approve a plan of complete liquidation
            of WMI or there is consummated an agreement for the sale or
            disposition by WMI of all or substantially all of WMI's assets (or
            any transaction having a similar effect), other than a sale or
            disposition by WMI of all or substantially all of WMI's assets to an
            entity, at least fifty percent (50%) of the combined voting power of
            the Voting Securities of which are owned by stockholders of WMI in
            substantially the same proportions as their ownership of WMI
            immediately prior to such sale.

            Additionally, the following terms shall have the following meanings:

            (i) For purposes of this Section 7, "Beneficial Owner" has the
            meaning set forth in Rule 13d-3 promulgated under the Exchange Act.

            (ii) For purposes of this Section 7, "Board" means the Board of
            Directors of WMI.

            (iii) For purposes of this Agreement, "Change in Control Period"
            means the period commencing on the date occurring six months
            immediately prior to the date on which a Change in Control occurs
            and

                                       22



            ending on the second anniversary of the date on which a Change in
            Control occurs.

            (iv) For purposes of this Section 7, "Exchange Act" means the
            Securities and Exchange Act of 1934, as amended.

            (v) For purposes of this Section 7, "Person" has the meaning set
            forth in Section 3(a)(9) of the Exchange Act, as modified and used
            in Sections 13(d) and 14(d) thereof, except that such term shall not
            include (A) Waste Management, (B) a trustee or other fiduciary
            holding securities under an employee benefit plan of Waste
            Management, (C) an employee benefit plan of Waste Management, or (D)
            an underwriter temporarily holding securities pursuant to an
            offering of such securities.

            (vi) For purposes of this Section 7, "Subsidiary" means an entity
            that is a direct or indirect majority-owned subsidiary of WMI.

            (vii) For purposes of this Section 7, "Voting Securities" means,
            with respect to a corporation, all securities of such corporation of
            any class or series that are entitled to vote generally in the
            election of directors of such corporation (excluding any class or
            series that would be entitled to vote by reason of the occurrence of
            any contingency, so long as such contingency has not occurred).

            (viii) For purposes of this Section 7, "Waste Management" means WMI
            and any or all of its Subsidiaries."

                                       23



      IN WITNESS WHEREOF, the parties hereto have duly executed this First
Amendment as of the day and year first stated above.

WASTE MANAGEMENT, INC.

By:  /s/ David P. Steiner
     -----------------------------
Name:  David P. Steiner
Title: Chief Executive Officer

WHEELABRATOR TECHNOLOGIES, INC.

By:/s/ Linda J. Smith
   -------------------------------
Name:  Linda J. Smith
Title: Vice President & Secretary

EXECUTIVE:

/s/ J. Drennan Lowell
- ----------------------------------
Drennan Lowell

                                       24