Document:

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                                                                   Exhibit 10.16

                           CHANGE IN CONTROL AGREEMENT

                  This Change in Control Agreement ("Agreement") is made and
entered into as of this ___ day of January 2001 by and between Theresa Carlise,
an individual (the "Executive"), and National Record Mart, Inc., a Delaware
Company (the "Company").

                                    RECITALS

                  A. The Company considers it essential to the best interests of
its shareholders to foster the continued employment of key management personnel.

                  B. The Company's Board of Directors recognizes that, as is the
case with many publicly held Companies, the possibility of a change in control
exists and that such possibility, and the uncertainty which it may engender
among management, may result in the departure or distraction of management
personnel to the detriment of the Company and its shareholders.

                  C. The Board of Directors has determined that appropriate
steps should be taken to reinforce and encourage the continued attention and
dedication of members of the Company's management, including the Executive, to
their assigned duties without distraction in the face of potentially disturbing
circumstances arising from the possibility of a change in control.

                  NOW, THEREFORE, in consideration of the premises and the
respective covenants herein contained, the Company and the Executive hereby
agree as follows:

                  1. Certain Definitions. The following terms when used in this
Agreement shall have the meaning hereafter set forth:

                  (a) "Beneficial Owner" shall have the meaning ascribed to such
term in Rule 13d-3 under the Securities Exchange Act of 1934, as amended from
time to time.

                  (b) "Change in Control" shall mean the determination (which
may be made effective as of a particular date specified by the Board of
Directors of the Company) by the Board of Directors of the Company, made by a
majority vote that a change in control has occurred, or is about to occur. Such
a change shall not include, however, a restructuring, reorganization, merger, or
other change in capitalization in which the Persons who own an interest in the
Company on the date hereof (the "Current Owners") (or any individual or entity
which receives from a Current Owner an interest in the Company through will or
the laws of descent and distribution) maintain more than an eighty percent (80%)
interest in the resultant entity. Regardless of the Board's vote or whether or
not the Board votes, a Change in Control will be deemed to have occurred as of
the first day any one (1) or more of the following subparagraphs shall have been
satisfied:

                      (i) Any Person (other than a Person in control of the
Company as of the date of this Agreement, or other than a trustee or other
fiduciary holding securities under an employee benefit plan of the Company, or a
Company owned directly or indirectly by the stockholders of the Company in
substantially the same proportions as their ownership of stock of

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the Company), becomes the Beneficial Owner, directly or indirectly, of
securities of the Company representing more than twenty percent (20%) of the
combined voting power of the Company's then outstanding securities;

                      (ii) The Company institutes any proceeding seeking an
order for relief under the Federal bankruptcy laws as now or hereafter in effect
or seeking to adjudicate it a bankrupt or insolvent, or seeking dissolution,
winding up, liquidation, reorganization, arrangement, adjustment or composition
of it or its debts under any law relating to bankruptcy, insolvency or
reorganization or relief of debtors or fails to file an answer or other pleading
denying the material allegations of any such proceeding filed against it; or

                      (iii) The stockholders of the Company approve:

                      (A) a plan of complete liquidation of the Company; or

                      (B) an agreement for the sale or disposition of all or
substantially all of the Company's assets; or

                      (C) a merger, consolidation, or reorganization of the
Company with or involving any other Company, other than a merger, consolidation,
or reorganization that would result in the voting securities of the Company
outstanding immediately prior thereto continuing to represent (either by
remaining outstanding or by being converted into voting securities of the
surviving entity) at least eighty percent (80%) of the combined voting power of
the voting securities of the Company (or such surviving entity) outstanding
immediately after such merger, consolidation, or reorganization.

However, in no event shall a Change in Control be deemed to have occurred, with
respect to the Executive, if the Executive is part of a purchasing group which
consummates the Change in Control transaction. The Executive shall be deemed
"part of a purchasing group" for purposes of the preceding sentence if the
Executive is an equity participant or has agreed to become an equity participant
in the purchasing company or group (except for (i) passive ownership of less
than five percent (5%) of the voting equity securities of the purchasing
company; or (ii) ownership of equity participation in the purchasing company or
group which is otherwise deemed not to be significant, as determined prior to
the Change in Control by a majority of the nonemployee continuing Directors of
the Board of Directors of the Company).

                  (c) "Person" shall have the meaning ascribed to such term in
Section 3(a)(9) of the Securities Exchange Act of 1934, as in effect on the date
hereof ("Exchange Act") and used in Sections 13(d) and 14(d) thereof, including
a "group" as defined in Section 13(d) thereof.

                  2. Term of Agreement. The Term of this Agreement shall
commence on the date hereof and end on December 31, 2001, unless further
extended as hereinafter provided. Commencing on January 1, 2002 and each January
1 thereafter, the Term shall automatically be extended for one additional year
unless, not later than September 30 of the preceding year, the Company or the
Executive shall have given notice not to extend the Term; provided, however,
that if a Change in Control shall have occurred during the Term, the Term shall
expire no earlier than six (6) months beyond the month in which such Change in
Control occurred.

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                  3. Executive's Right to Terminate upon Change in Control.
Notwithstanding the term of employment set forth in the Employment Agreement,
dated as of January 1, 1996, between the Executive and the Company, as amended
(as the same may be further amended from time to time, the "Employment
Agreement"), the Executive shall have the right, exercisable by providing Notice
of Termination to the Company, to immediately terminate her employment in the
event of a Change in Control; provided such Notice of Termination shall have
been given not more than ninety (90) days after the date on which such Change in
Control is deemed to have occurred.

                  4. Severance Payment. In the event that Executive elects to
terminate her employment in accordance with Section 3 hereof, the Company shall
pay the Executive a lump sum severance payment, in cash, equal to the
Executive's annual base salary as in effect immediately prior to the Date of
Termination (the "Severance Payment"). The Severance Payment shall be in lieu of
any further salary payments to the Executive for periods subsequent to the Date
of Termination and in lieu of any severance benefit or separation pay otherwise
payable to the Executive. No Severance Payment shall be payable under this
Agreement unless there shall have been a termination of the Executive's
employment with the Company in accordance with Section 3 hereof and during the
Term. This Agreement shall not be construed as creating an express or implied
contract of employment and, except as otherwise agreed in writing between the
Executive and the Company, the Executive shall not have any right to be retained
in the employ of the Company.

                  5. Notice of Termination. After a Change in Control and during
the Term, any purported termination of her employment by the Executive hereunder
shall be communicated to the Company by written notice ("Notice of Termination")
which shall specify the date on which the Executive's employment shall
terminate, which shall not be less than fifteen (15) days nor more than sixty
(60) days, respectively, from the date such Notice of Termination is given
("Date of Termination").

                  6. Timing of Severance Payment. The Severance Payment shall be
made not later than the tenth business day following the Date of Termination

                  7. Successors. This Agreement shall inure to the benefit of
and be enforceable by the Executive's personal or legal representatives,
executors, administrators, successors, heirs, distributees, devisees and
legatees. If the Executive shall die while any amount would still be payable to
the Executive hereunder (other than amounts which, by their terms, terminate
upon the death of the Executive) if the Executive had continued to live, each
such amount, unless otherwise provided herein, shall be paid in accordance with
the terms of this Agreement to the executors, personal representatives or
administrators of the Executive's estate.

                  8. Notices. For the purpose of this Agreement, notices and all
other communications provided for in the Agreement shall be in writing and shall
be deemed to have been duly given when delivered or mailed by United States
registered mail, return receipt requested, postage prepaid, addressed, if to the
Executive, to the address inserted below the Executive's signature on the final
page hereof and, if to the Company, to the address set forth below, or to such
other address as either party may have furnished to the other in writing in
accordance herewith, except that notice of change of address shall be effective
only upon actual receipt:

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                  To the Company:

                  National Record Mart, Inc.
                  507 Forest Avenue
                  Carnegie, PA 15106
                  Attention: William A. Teitelbaum

                  9. Miscellaneous. No provision of this Agreement may be
modified, waived or discharged unless such waiver, modification or discharge is
agreed to in writing and signed by the Executive and such officer as may be
specifically designated by the Board of Directors of the Company. No waiver by
either party hereto at any time of any breach by the other party hereto of, or
of any lack of compliance with, any condition or provision of this Agreement to
be performed by such other party shall be deemed a waiver of similar or
dissimilar provisions or conditions at the same or at any prior or subsequent
time. This Agreement supersedes any other agreements or representations, oral or
otherwise, express or implied, with respect to the subject matter hereof which
have been made by either party. The validity, interpretation, construction and
performance of this Agreement shall be governed by the laws of the Commonwealth
of Pennsylvania. Any payments provided for hereunder shall be paid net of any
applicable withholding required under federal, state or local law and any
additional withholding to which the Executive has agreed.

                  10. Validity. The invalidity or unenforceability of any
provision of this Agreement shall not affect the validity or enforceability of
any other provision of this Agreement, which shall remain in full force and
effect.

                  11. Counterparts. This Agreement may be executed in several
counterparts, each of which shall be deemed to be an original but all of which
together will constitute one and the same instrument.

                  12. Settlement of Disputes; Arbitration. Any dispute or
controversy as to the validity, interpretation, construction, application or
enforcement of, or otherwise arising under or in connection with this Agreement,
shall be submitted at the request of either party hereto for resolution and
settlement through arbitration in Pittsburgh, Pennsylvania in accordance with
the rules then prevailing with the American Arbitration Association. Any award
rendered therein shall be final and binding on each of the parties hereto and
their heirs, executors and administrators and successors and assigns, and
judgment may be entered thereon in any court having jurisdiction.

                  [Remainder of page intentionally left blank.]

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                  IN WITNESS WHEREOF, the parties hereto have executed this
Amendment or caused this Amendment to be duly executed as of the day and year
first written above.

WITNESS:                                 THERESA CARLISE

Glenn E. Spoharski                       Theresa Carlise
------------------------------------     ---------------------------------------

                                         Notice Address:
                                         754 Shady Lane
                                         ---------------------------------------
                                         Pittsburgh, PA 15228
                                         ---------------------------------------

                                         ---------------------------------------

ATTEST:                                  NATIONAL RECORD MART, INC.

Theresa Carlise                          By: William A. Teitelbaum
------------------------------------        ------------------------------------
Secretary                                Name: William A. Teitelbaum
                                         Title: CEO, President & Chairman

Glenn E. Spoharski
------------------------------------
Assistant Secretary

                                      -5-<PAGE>   1
                                                                    EXHIBIT 10.5

                       THE 2001 EQUITY PARTICIPATION PLAN
                                       OF
                         OIL STATES INTERNATIONAL, INC.

         OIL STATES INTERNATIONAL, INC., a Delaware corporation, has adopted The
2001 Equity Participation Plan of Oil States International, Inc. (the "Plan"),
effective ____________, 2001 (the "Effective Date"), for the benefit of its
eligible employees, consultants and directors. This Plan is an amendment and
restatement of the 1996 Equity Participation Plan of CE Holdings, Inc.
("ConEmsco Plan") to be effective as provided in Section 10.4.

         The purposes of this Plan are as follows:

         (1) To provide an additional incentive for Directors, Employees and
consultants to further the growth, development and financial success of the
Company by personally benefitting through the ownership of Company stock and/or
rights which recognize such growth, development and financial success.

         (2) To enable the Company to obtain and retain the services of
Directors, Employees and consultants considered essential to the long range
success of the Company by offering them an opportunity to own stock in the
Company and/or rights which will reflect the growth, development and financial
success of the Company.

                                    ARTICLE I

                                   DEFINITIONS

         1.1 General. All references to share numbers and dollar amounts in this
Plan shall be deemed to give effect to the concurrent reverse three-for-one
split of the Common Stock to be effected on or before the Effective Date.
Wherever the following terms are used in this Plan they shall have the meaning
specified below, unless the context clearly indicates otherwise.

         1.2 Affiliate. "Affiliate" shall mean any entity that, directly or
through one or more intermediaries, is controlled by the Company or controls the
Company as determined by the Committee.

         1.3 Award Limit. "Award Limit" shall mean 400,000 shares of Common
Stock.

         1.4 Board. "Board" shall mean the Board of Directors of the Company.

         1.5 Change of Control. "Change of Control" shall mean any of the
following:

         (a) any "person" (as such term is used in Section 13(d) and 14(d) of
the Securities Exchange Act of 1934, as amended (the "Exchange Act")), (other
than a trustee or other fiduciary holding

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securities under an employee benefit plan of the Company or any affiliate, SCF
III, L.P., SCF IV, L.P., or any affiliate of SCF-III, L.P. or SCF-IV, L.P. or
any corporation owned, directly or indirectly, by the stockholders of the
Company in substantially the same proportions as their ownership of stock of the
Company), acquires "beneficial ownership" (within the meaning of Rule 13d-3
under the Exchange Act) of securities of the Company representing 35% or more of
the combined voting power of the Company's then outstanding securities;
provided, however, that if the Company engages in a merger or consolidation in
which the Company or surviving entity in such merger or consolidation becomes a
subsidiary of another entity, then references to the Company's then outstanding
securities shall be deemed to refer to the outstanding securities of such parent
entity;

         (b) a change in the composition of the Board, as a result of which
fewer than a majority of the directors are Incumbent Directors. "Incumbent
Directors" shall mean directors who either (i) are directors of the Company as
of the Effective Date, or (ii) are elected, or nominated for election, to the
Board with the affirmative votes of at least two-thirds of the Incumbent
Directors at the time of such election or nomination, but Incumbent Director
shall not include an individual whose election or nomination occurs as a result
of either (1) an actual or threatened election contest (as such terms are used
in Rule 14a-11 of Regulation 14A promulgated under the Exchange Act) or (2) an
actual or threatened solicitation of proxies or consents by or on behalf of a
person other than the Board;

         (c) the consummation of a merger or consolidation of the Company with
any other corporation, other than a merger or consolidation which would result
in the voting securities of the Company outstanding immediately prior thereto
continuing to represent (either by remaining outstanding or by being converted
into voting securities of the surviving entity (or if the surviving entity is or
shall become a subsidiary of another entity, then such parent entity)) more than
50% of the combined voting power of the voting securities of the Company (or
such surviving entity or parent entity, as the case may be) outstanding
immediately after such merger or consolidation;

         (d) the stockholders of the Company approve a plan of complete
liquidation of the Company; or

         (e) the sale or disposition (other than a pledge or similar
encumbrance) by the Company of all or substantially all of the assets of the
Company other than to a subsidiary or subsidiaries of the Company.

         1.6 Code. "Code" shall mean the Internal Revenue Code of 1986, as
amended.

         1.7 Committee. "Committee" shall mean the Board or a subcommittee of
the Board appointed as provided in Section 9.1.

         1.8 Common Stock. "Common Stock" shall mean the common stock of the
Company, par value $0.01 per share.

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         1.9 Company. "Company" shall mean Oil States International, Inc., a
Delaware corporation.

         1.10 Deferred Stock. "Deferred Stock" shall mean Common Stock awarded
under Article VII of this Plan.

         1.11 Director. "Director" shall mean a member of the Board who is not
an Employee.

         1.12 Dividend Equivalent. "Dividend Equivalent" shall mean a right to
receive the equivalent value (in cash or Common Stock) of dividends paid on
Common Stock, awarded under Article VII of this Plan.

         1.13 Employee. "Employee" shall mean any officer or other employee (as
defined in accordance with Section 3401(c) of the Code) of the Company or of any
Affiliate or Subsidiary.

         1.14 Exchange Act. "Exchange Act" shall mean the Securities Exchange
Act of 1934, as amended.

         1.15 Fair Market Value. "Fair Market Value" of a share of Common Stock
as of a given date shall be (i) the closing price of a share of Common Stock on
the principal exchange on which shares of Common Stock are then trading, if any
(as reported in any reporting service approved by the Committee), on the trading
day previous to such date, or if shares were not traded on the trading day
previous to such date, then on the next preceding date on which a trade
occurred, or (ii) if Common Stock is not traded on an exchange but is quoted on
Nasdaq or a successor quotation system, the mean between the closing
representative bid and asked prices for the Common Stock on the trading day
previous to such date as reported by Nasdaq or such successor quotation system;
or (iii) if Common Stock is not publicly traded on an exchange and not quoted on
Nasdaq or a successor quotation system, the Fair Market Value of a share of
Common Stock as established by the Committee acting in good faith.
Notwithstanding the foregoing, the Fair Market Value of a share of Common Stock
on the date of an initial public offering of Common Stock shall be the offering
price under such initial public offering.

         1.16 Grantee. "Grantee" shall mean an Employee or consultant granted a
Performance Award, Dividend Equivalent, or Stock Payment, or an award of
Deferred Stock, under this Plan.

         1.17 Non-Qualified Stock Option. "Non-Qualified Stock Option" shall
mean an Option which is not designated as an Incentive Stock Option by the
Committee.

         1.18 Option. "Option" shall mean a stock option granted under Article
III of this Plan). An Option granted under this Plan shall, as determined by the
Committee, be either a Non-Qualified Stock Option or an Incentive Stock Option;
provided, however, that Options granted to Directors, consultants and Employees
employed by an Affiliate that is not a Subsidiary shall be Non-Qualified Stock
Options.

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         1.19 Optionee. "Optionee" shall mean an Employee, consultant or
Director granted an Option under this Plan.

         1.20 Performance Award. "Performance Award" shall mean a performance or
incentive award, other than an Option, Restricted Stock, Deferred Stock or Stock
Payments, that is paid in cash, Common Stock or a combination of both, awarded
under Article VII of this Plan.

         1.21 Performance Objectives. "Performance Objectives" means the
objectives, if any, established by the Committee that are to be achieved with
respect to an Award granted under this Plan, which may be described in terms of
Company-wide objectives, in terms of objectives that are related to performance
of a division, subsidiary, department or function within the Company or an
Affiliate in which the Participant receiving the Award is employed or in
individual or other terms, and which will relate to the period of time
determined by the Committee. The Performance Objectives intended to qualify
under Section 162(m) of the Code shall be with respect to one or more of the
following: (i) net income; (ii) pre-tax income; (iii) operating income; (iv)
cash flow; (v) earnings per share; (vi) earnings before any one or more of the
following items: interest, taxes, depreciation or amortization; (vii) return on
equity; (viii) return on invested capital or assets; (ix) cost reductions or
savings; (x) funds from operations and (xi) appreciation in the fair market
value of the Company's common stock. Which objectives to use with respect to an
Award, the weighting of the objectives if more than one is used, and whether the
objective is to be measured against a Company-established budget or target, an
index or a peer group of companies, shall be determined by the Committee in its
discretion at the time of grant of the Award. A Performance Objective need not
be based on an increase or a positive result and may include, for example,
maintaining the status quo or limiting economic losses.

         1.22 Plan. "Plan" shall mean The 2001 Equity Participation Plan of Oil
States International, Inc.

         1.23 QDRO. "QDRO" shall mean a qualified domestic relations order as
defined by the Code or Title I of the Employee Retirement Income Security Act of
1974, as amended, or the rules thereunder.

         1.24 Restricted Stock. "Restricted Stock" shall mean Common Stock
awarded under Article VI of this Plan.

         1.25 Restricted Stockholder. "Restricted Stockholder" shall mean an
Employee or consultant granted an award of Restricted Stock under Article VI of
this Plan.

         1.26 Rule 16b-3. "Rule 16b-3" shall mean that certain Rule 16b-3 under
the Exchange Act, as such Rule may be amended from time to time.

         1.27 Stock Payment. "Stock Payment" shall mean (i) a payment in the
form of shares of Common Stock, or (ii) an option or other right to purchase
shares of Common Stock, as part of a

                                       -4-
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deferred compensation arrangement, made in lieu of all or any portion of the
compensation, including without limitation, salary, bonuses and commissions,
that would otherwise become payable to an Employee or consultant in cash,
awarded under Article VII of this Plan.

         1.28 Subsidiary. "Subsidiary" shall mean any corporation in an unbroken
chain of corporations beginning with the Company if each of the corporations
other than the last corporation in the unbroken chain then owns stock possessing
50 percent or more of the total combined voting power of all classes of stock in
one of the other corporations in such chain.

                                   ARTICLE II

                             SHARES SUBJECT TO PLAN

         2.1  Shares Subject to Plan.

         (a) The shares of stock subject to Options, awards of Restricted Stock,
Performance Awards, Dividend Equivalents, awards of Deferred Stock, or Stock
Payments shall be Common Stock. The aggregate number of such shares which may be
issued upon exercise of such options or rights or upon any such awards under the
Plan shall not exceed three million seven hundred thousand (3,700,000). The
shares of Common Stock issuable upon exercise of such options or rights or upon
any such awards may be either previously authorized but unissued shares or
treasury shares.

         (b) The maximum number of shares which may be subject to Options,
Restricted Stock or Deferred Stock granted under the Plan to any individual in
any calendar year shall not exceed the Award Limit. The maximum value of
Performance Awards granted under the Plan to any individual in any calendar year
shall not exceed $2.5 million.

         2.2 Add-back Options and Other Rights. If any Option, or other right to
acquire shares of Common Stock under any other award under this Plan, expires or
is canceled without having been fully exercised or is exercised in whole or in
part for cash as permitted by this Plan, the number of shares subject to such
Option or other right but as to which such Option or other right was not
exercised prior to its expiration or cancellation or was exercised for cash may
again be optioned, granted or awarded hereunder, subject to the limitations of
Section 2.1. If any share of Restricted Stock is forfeited by the Grantee, such
share may again be optioned, granted or awarded hereunder, subject to the
limitations of Section 2.1.

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                                   ARTICLE III

                               GRANTING OF OPTIONS

         3.1 Eligibility. Any Employee or consultant selected by the Committee
pursuant to Section 3.4(a)(i) shall be eligible to be granted an Option. Each
Director of the Company shall be granted Options at the times and in the manner
set forth in Section 3.4(d).

         3.2 Disqualification for Stock Ownership. No person may be granted an
Incentive Stock Option under this Plan if such person, at the time the Incentive
Stock Option is granted, owns stock possessing more than ten percent (10%) of
the total combined voting power of all classes of stock of the Company or any
then existing Subsidiary unless such Incentive Stock Option conforms to the
applicable provisions of Section 422 of the Code,

         3.3 Qualification of Incentive Stock Options. No Incentive Stock Option
shall be granted unless such Option, when granted, qualifies as an "incentive
stock option" under Section 422 of the Code. No Incentive Stock Option shall be
granted to any person who is not an employee of the Company or a Subsidiary.

         3.4  Granting of Options

         (a) The Committee shall from time to time, in its absolute discretion,
and subject to applicable limitations of this Plan:

         (i) Select from among the Employees or consultants (including Employees
or consultants who have previously received Options or other awards under this
Plan) such of them as in its opinion should be granted Options;

         (ii) Subject to the Award Limit, determine the number of shares to be
subject to such Options granted to the selected Employees or consultants;

         (iii) Determine whether such Options are to be Incentive Stock Options
or Non-Qualified Stock Options; and

         (iv) Determine the terms and conditions of such Options, consistent
with this Plan.

         (b) Upon the selection of an Employee or consultant to be granted an
Option, the Committee shall instruct the Secretary of the Company to issue the
Option and may impose such conditions on the grant of the Option as it deems
appropriate.

         (c) Any Incentive Stock Option granted under this Plan may be modified
by the Committee to disqualify such option from treatment as an "incentive stock
option" under Section 422 of the Code.

                                       -6-

<PAGE>   7

         (d) During the term of the Plan, (i) a person who is a Director as of
the Effective Date automatically shall be granted an option to purchase five
thousand (5,000) shares of Common Stock (subject to adjustment as provided in
Section 10.3) on the Effective Date and on the date of each annual meeting of
stockholders at which the Director is reelected to the Board or at which the
Director continues to serve, and (ii) a person who is initially elected or
appointed to the Board automatically shall be granted (A) an option to purchase
five thousand (5,000) shares of Common Stock (subject to adjustment as provided
in Section 10.3) on the date of such initial election or appointment and (B) an
option to purchase five thousand (5,000) shares of Common Stock (subject to
adjustment as provided in Section 10.3) on the date of each annual meeting of
stockholders occurring after such initial election or appointment at which the
Director is reelected to the Board or at which the Director continues to serve.
Members of the Board who are Employees of the Company who subsequently retire
from the Company and remain on the Board will not receive an initial Option
grant pursuant to clause (ii)(A) of the preceding sentence, but to the extent
that they are otherwise eligible, will receive, after retirement from the
Company, Options as described in the clause (ii)(B) of the preceding sentence.
All of the foregoing Option grants authorized by this Section 3.4(d) are subject
to stockholder approval of the Plan.

                                   ARTICLE IV

                                TERMS OF OPTIONS

         4.1 Option Agreement. Each Option shall be evidenced by a Stock Option
Agreement, which shall be executed by the Optionee and an authorized officer of
the Company and which shall contain such terms and conditions as the Committee
shall determine, consistent with this Plan.

         4.2 Option Price. The price per share of the shares subject to each
Option shall be set by the Committee; provided, however, that, except as
provided in Section 8.1 with respect to assumed options, such price shall not be
less than 100% of the Fair Market Value of a share of Common Stock on the date
the Option is granted.

         4.3 Option Term. The term of an Option shall be set by the Committee in
its discretion; provided, however, that (i) in the case of Options granted to
Directors, the term shall be ten (10) years from the date the Option is granted
and (ii) in the case of Incentive Stock Options, the term shall not be more than
ten (10) years from the date the Incentive Stock Option is granted, or five (5)
years from such date if the Incentive Stock Option is granted to an individual
then owning (within the meaning of Section 424(d) of the Code) more than 10% of
the total combined voting power of all classes of stock of the Company or any
Subsidiary).

                                       -7-

<PAGE>   8

         4.4 Option Vesting

         (a) The period during which the right to exercise an Option in whole or
in part vests in the Optionee shall be set by the Committee and the Committee
may determine that an Option may not be exercised in whole or in part for a
specified period after it is granted; provided, however, that, Options granted
to Directors shall become exercisable in cumulative annual installments of 25%
on each of the first, second, third and fourth annual meetings of the
stockholders following the date the Option is granted. At any time after grant
of an Option, the Committee may, in its sole and absolute discretion and subject
to whatever terms and conditions it selects, accelerate the period during which
an Option vests.

         (b) To the extent that the aggregate Fair Market Value of stock with
respect to which "incentive stock options" (within the meaning of Section 422 of
the Code, but without regard to Section 422(d) of the Code) are exercisable for
the first time by an Optionee during any calendar year (under the Plan and all
other incentive stock option plans of the Company and any parent or Subsidiary)
exceeds $100,000, such Options shall be treated as Non-Qualified Options to the
extent required by Section 422 of the Code. The rule set forth in the preceding
sentence shall be applied by taking Options into account in the order in which
they were granted. For purposes of this Section 4.4(b), the Fair Market Value of
stock shall be determined as of the time the Option with respect to such stock
is granted.

                                    ARTICLE V

                               EXERCISE OF OPTIONS

         5.1 Partial Exercise. An exercisable Option may be exercised in whole
or in part; however, an Option shall not be exercisable with respect to
fractional shares and the Committee may require that, by the terms of the
Option, a partial exercise be with respect to a minimum number of shares.

         5.2 Manner of Exercise. All or a portion of an exercisable Option shall
be deemed exercised upon delivery of all of the following to the Secretary of
the Company or his office:

         (a) A written notice complying with the applicable rules established by
the Committee stating that the Option, or a portion thereof, is exercised. The
notice shall be signed by the Optionee or other person then entitled to exercise
the Option or such portion;

         (b) Such representations and documents as the Committee, in its
absolute discretion, deems necessary or advisable to effect compliance with all
applicable provisions of the Securities Act of 1933, as amended, and any other
federal or state securities laws or regulations. The Committee or Board may, in
its absolute discretion, also take whatever additional actions it deems
appropriate to effect such compliance including, without limitation, placing
legends on share certificates and issuing stop-transfer notices to agents and
registrars;

                                       -8-
<PAGE>   9

         (c) In the event that the Option shall be exercised pursuant to Section
10.1 by any person or persons other than the Optionee, appropriate proof of the
right of such person or persons to exercise the Option; and

         (d) Full cash payment to the Secretary of the Company for the shares
with respect to which the Option, or portion thereof, is exercised. However, the
Committee may in its discretion or provide in the grant agreement (i) that
payment may be made, in whole or in part, through the delivery of shares of
Common Stock owned by the Optionee, duly endorsed for transfer to the Company,
with a Fair Market Value on the date of delivery not in excess of the aggregate
exercise price of the Option or exercised portion thereof and subject to such
other limitations as the Committee may impose thereon, (ii) allow payment, in
whole or in part, through the surrender of shares of Common Stock then issuable
upon exercise of the Option having a Fair Market Value on the date of Option
exercise equal to the aggregate exercise price of the Option or exercised
portion thereof, (iii) allow payment, in whole or in part, through the delivery
of property of any kind which constitutes good and valuable consideration; (iv)
allow payment, in whole or in part, through the delivery of a full recourse
promissory note bearing interest (at no less than such rate as shall then
preclude the imputation of interest under the Code) and payable upon such terms
as may be prescribed by the Committee, (v) allow payment through a
cashless-broker procedure approved by the Company, or (vi) allow payment through
any combination of the consideration provided above. In the case of a promissory
note, the Committee may also prescribe the form of such note and the security to
be given for such note. The Option may not be exercised, however, by delivery of
a promissory note or by a loan from the Company when or where such loan or other
extension of credit is prohibited by law.

         5.3 Conditions to Issuance of Stock Certificates. The Company shall not
be required to issue or deliver any certificate or certificates for shares of
stock purchased upon the exercise of any Option or portion thereof prior to
fulfillment of all of the following conditions:

         (a) The admission of such shares to listing on all stock exchanges on
which such class of stock is then listed;

         (b) The completion of any registration or other qualification of such
shares under any state or federal law, or under the rulings or regulations of
the Securities and Exchange Commission or any other governmental regulatory body
which the Committee shall, in its absolute discretion, deem necessary or
advisable;

         (c) The obtaining of any approval or other clearance from any state or
federal governmental agency which the Committee shall, in its absolute
discretion, determine to be necessary or advisable;

         (d) The lapse of such reasonable period of time following the exercise
of the Option as the Committee may establish from time to time for reasons of
administrative convenience; and

                                       -9-
<PAGE>   10

         (e) The receipt by the Company of full payment for such shares,
including payment of any applicable withholding tax.

         5.4 Rights as Stockholders. The holders of Options shall not be, nor
have any of the rights or privileges of, stockholders of the Company in respect
of any shares purchasable upon the exercise of any part of an Option unless and
until certificates representing such shares have been issued by the Company to
such holders.

         5.5 Ownership and Transfer Restrictions. The Committee, in its absolute
discretion, may impose such restrictions on the ownership and transferability of
the shares purchasable upon the exercise of an Option as it deems appropriate.
Any such restriction shall be set forth in the respective Stock Option Agreement
and may be referred to on the certificates evidencing such shares. The Committee
may require the Optionee to give the Company prompt notice of any disposition of
shares of Common Stock acquired by exercise of an Incentive Stock Option within
(i) two years from the date of granting such Option to such Optionee or (ii) one
year after the transfer of such shares to such Optionee. The Committee may
direct that the certificates evidencing shares acquired by exercise of an Option
refer to such requirement to give prompt notice of disposition.

         5.6 Limitations on Exercise of Options Granted to Directors. No Option
granted to a Director may be exercised to any extent by anyone after the first
to occur of the following events:

         (a) the expiration of twelve (12) months from the date of the
Optionee's death;

         (b) the expiration of twelve (12) months from the date of the
Optionee's ceasing to be a Director by reason of his permanent and total
disability (within the meaning of Section 22(e)(3) of the Code);

         (c) the expiration of three (3) months from the date of the Optionee's
ceasing to be a Director for any reason other than such Optionee's death or his
permanent and total disability, unless the Optionee dies within said three-month
period; or

         (d) the expiration of ten (10) years from the date the Option was
granted.

                                   ARTICLE VI

                            AWARD OF RESTRICTED STOCK

         6.1 Award of Restricted Stock

         (a) The Committee shall from time to time, in its absolute discretion:

                                      -10-

<PAGE>   11

         (i) Select from among the Employees or consultants (including Employees
or consultants who have previously received other awards under this Plan) such
of them as in its opinion should be awarded Restricted Stock; and

         (ii) Determine the terms and conditions applicable to such Restricted
Stock, consistent with this Plan, which may include the achievement of
Performance Objectives.

         (b) Upon the selection of an Employee or consultant to be awarded
Restricted Stock, the Committee shall instruct the Secretary of the Company to
issue such Restricted Stock and may impose such conditions on the issuance of
such Restricted Stock as it deems appropriate.

         6.2 Restricted Stock Agreement. Restricted Stock shall be issued only
pursuant to a Restricted Stock Agreement, which shall be executed by the
selected Employee or consultant and an authorized officer of the Company and
which shall contain such terms and conditions as the Committee shall determine,
consistent with this Plan.

         6.3 Rights as Stockholders. Upon delivery of the shares of Restricted
Stock to the escrow holder, the Restricted Stockholder shall have, unless
otherwise provided by the Committee, all the rights of a stockholder with
respect to said shares, subject to the restrictions in his Restricted Stock
Agreement, including the right to receive all dividends and other distributions
paid or made with respect to the shares; provided, however, that in the
discretion of the Committee, any extraordinary distributions with respect to the
Common Stock shall be subject to the restrictions set forth in Section 6.4.

         6.4 Restriction. All shares of Restricted Stock issued under this Plan
(including any shares received by holders thereof with respect to shares of
Restricted Stock as a result of stock dividends, stock splits or any other form
of recapitalization) shall, in the terms of each individual Restricted Stock
Agreement, be subject to such restrictions as the Committee shall provide, which
restrictions may include, without limitation, restrictions concerning voting
rights and transferability and restrictions based on duration of employment with
the Company, Company performance and individual performance; provided, however,
that, by action taken after the Restricted Stock is issued, the Committee may,
on such terms and conditions as it may determine to be appropriate, remove any
or all of the restrictions imposed by the terms of the Restricted Stock
Agreement. Restricted Stock may not be sold or encumbered until all restrictions
are terminated or expire.

         6.5 Escrow. The Secretary of the Company or such other escrow holder as
the Committee may appoint shall retain physical custody of each certificate
representing Restricted Stock until all of the restrictions imposed under the
Restricted Stock Agreement with respect to the shares evidenced by such
certificate expire or shall have been removed.

         6.6 Legend. In order to enforce the restrictions imposed upon shares of
Restricted Stock hereunder, the Committee shall cause a legend or legends to be
placed on certificates representing all

                                      -11-
<PAGE>   12

shares of Restricted Stock that are still subject to restrictions under
Restricted Stock Agreements, which legend or legends shall make appropriate
reference to the conditions imposed thereby.

                                   ARTICLE VII

                    PERFORMANCE AWARDS, DIVIDEND EQUIVALENTS,
                         DEFERRED STOCK, STOCK PAYMENTS

         7.1 Performance Awards. Any Employee or consultant selected by the
Committee may be granted one or more Performance Awards. The value of such
Performance Awards may be linked to the achievement of such specific Performance
Objectives determined appropriate by the Committee over any period or periods
determined by the Committee. In making such determinations, the Committee shall
consider (among such other factors as it deems relevant in light of the specific
type of award) the contributions, responsibilities and other compensation of the
particular Employee or consultant.

         7.2 Dividend Equivalents. Any Employee or consultant selected by the
Committee may be granted Dividend Equivalents based on the dividends declared on
Common Stock, to be credited as of dividend payment dates, during the period
between the date an Option, Deferred Stock or Performance Award is granted, and
the date such Option, Deferred Stock or Performance Award is exercised, vests or
expires, as determined by the Committee. Such Dividend Equivalents shall be
converted to cash or additional shares of Common Stock by such formula and at
such time and subject to such limitations as may be determined by the Committee.

         7.3 Stock Payments. Any Employee or consultant selected by the
Committee may receive Stock Payments in the manner determined from time to time
by the Committee. The number of shares shall be determined by the Committee and
may be based upon the Fair Market Value, book value, net profits or other
measure of the value of Common Stock or other specific performance criteria
determined appropriate by the Committee, determined on the date such Stock
Payment is made or on any date thereafter.

         7.4 Deferred Stock. Any Employee or consultant selected by the
Committee may be granted an award of Deferred Stock in the manner determined
from time to time by the Committee. The number of shares of Deferred Stock shall
be determined by the Committee and may be linked to the achievement of such
specific Performance Objectives determined to be appropriate by the Committee
over any period or periods determined by the Committee. Common Stock underlying
a Deferred Stock award will not be issued until the Deferred Stock award has
vested, pursuant to a vesting schedule or Performance Objectives set by the
Committee, as the case may be. Unless otherwise provided by the Committee, a
Grantee of Deferred Stock shall have no rights as a Company stockholder with
respect to such Deferred Stock until such time as the award has vested and the
Common Stock underlying the award has been issued.

                                      -12-
<PAGE>   13

         7.5 Performance Award Agreement, Dividend Equivalent Agreement,
Deferred Stock Agreement, Stock Payment Agreement. Each Performance Award,
Dividend Equivalent, award of Deferred Stock and/or Stock Payment shall be
evidenced by an agreement, which shall be executed by the Grantee and an
authorized Officer of the Company and which shall contain such terms and
conditions as the Committee shall determine, consistent with this Plan.

         7.6 Term. The term of a Performance Award, Dividend Equivalent, award
of Deferred Stock and/or Stock Payment shall be set by the Committee in its
discretion.

         7.7 Exercise Upon Termination of Employment. A Performance Award,
Dividend Equivalent, award of Deferred Stock and/or Stock Payment is exercisable
or payable only while the Grantee is an Employee or consultant; provided that
the Committee may determine that the Performance Award, Dividend Equivalent,
award of Deferred Stock and/or Stock Payment may be exercised or paid subsequent
to termination of employment or termination of consultancy without cause, or
following a change in control of the Company, or because of the Grantee's
retirement, death or disability, or otherwise.

         7.8 Payment. Payment of the amount determined under Section 7.1 or 7.2
above shall be in cash, in Common Stock or a combination of both, as determined
by the Committee. To the extent any payment under this Article VII is effected
in Common Stock, it shall be made subject to satisfaction of all provisions of
Section 5.3.

                                  ARTICLE VIII

                         MERGED PLANS/REPLACEMENT AWARDS

         8.1 The following plans have been merged into this Plan: the Sooner,
Inc. 1998 Stock Option Plan and the HWC Energy Services, Inc. 1997 Stock Option
Plan, and all stock options and other stock-based awards granted under such
plans are converted into options and awards under this Plan with respect to
Common Stock. In addition, the individual stock option grants made outside of a
plan by Sooner, Inc. and PTI Group, Inc. to their respective employees and
outstanding on the date of their respective mergers with the Company or a
Company Subsidiary also are hereby assumed and converted into Company options.
The number of shares and the exercise price of each assumed award shall be made
pursuant to the applicable merger agreement between the Company and the
stockholders of such entities.

                                      -13-

<PAGE>   14

                                   ARTICLE IX

                                 ADMINISTRATION

         9.1 Committee. The Committee members shall be appointed by and hold
office at the pleasure of the Board. Appointment of Committee members shall be
effective upon acceptance of appointment. Committee members may resign at any
time by delivering written notice to the Board. Vacancies in the Committee may
be filled by the Board.

         9.2 Duties and Powers of Committee. It shall be the duty of the
Committee to conduct the general administration of this Plan in accordance with
its provisions. The Committee shall have the power to interpret this Plan and
the agreements pursuant to which Options, awards of Restricted Stock or Deferred
Stock, Performance Awards, Dividend Equivalents or Stock Payments are granted or
awarded, and to adopt such rules for the administration, interpretation, and
application of this Plan as are consistent therewith and to interpret, amend or
revoke any such rules. Any such grant or award under this Plan need not be the
same with respect to each Optionee, Grantee or Restricted Stockholder. Any such
interpretations and rules with respect to Incentive Stock Options shall be
consistent with the provisions of Section 422 of the Code. In its absolute
discretion, the Board may at any time and from time to time exercise any and all
rights and duties of the Committee under this Plan except with respect to
matters which under Rule 16b-3 or Section 162(m) of the Code, or any regulations
or rules issued thereunder, are required to be determined in the sole discretion
of the Committee.

         9.3 Majority Rule; Unanimous Written Consent. The Committee shall act
by a majority of its members in attendance at a meeting at which a quorum is
present or by a memorandum or other written instrument signed by all members of
the Committee.

         9.4 Compensation; Professional Assistance, Good Faith Actions. Members
of the Committee shall receive such compensation for their services as members
as may be determined by the Board. All expenses and liabilities which members of
the Committee incur in connection with the administration of this Plan shall be
borne by the Company. The Committee may employ attorneys, consultants,
accountants, appraisers, brokers, or other persons. The Committee, the Company
and the Company's officers and Directors shall be entitled to rely upon the
advice, opinions or valuations of any such persons. All actions taken and all
interpretations and determinations made by the Committee or the Board in good
faith shall be final and binding upon all Optionees, Grantees, Restricted
Stockholders, the Company and all other interested persons. No members of the
Committee or Board shall be personally liable for any action, determination or
interpretation made in good faith with respect to this Plan, Options, awards of
Restricted Stock or Deferred Stock, Performance Awards, Dividend Equivalents or
Stock Payments, and all members of the Committee and the Board shall be fully
protected by the Company in respect of any such action, determination or
interpretation.

                                      -14-

<PAGE>   15

                                    ARTICLE X

                            MISCELLANEOUS PROVISIONS

         10.1 Not Transferable. Except as provided below, Options, Restricted
Stock awards, Deferred Stock awards, Performance Awards, Dividend Equivalents or
Stock Payments under this Plan may not be sold, pledged, assigned, or
transferred in any manner other than by will or the laws of descent and
distribution or pursuant to a QDRO, unless and until such rights or awards have
been exercised, or the shares underlying such rights or awards have been issued,
and all restrictions applicable to such shares have lapsed. No Option,
Restricted Stock award, Deferred Stock award, Performance Award, Dividend
Equivalent or Stock Payment or interest or right therein shall be liable for the
debts, contracts or engagements of the Optionee, Grantee or Restricted
Stockholder or his successors in interest or shall be subject to disposition by
transfer, alienation, anticipation, pledge, encumbrance, assignment or any other
means whether such disposition be voluntary or involuntary or by operation of
law by judgment, levy, attachment, garnishment or any other legal or equitable
proceedings (including bankruptcy), and any attempted disposition thereof shall
be null and void and of no effect, except to the extent that such disposition is
permitted by the preceding sentence. An Optionee may, with the consent of the
Committee, transfer a Nonqualified Stock Option to such family members and
persons as may be permitted by this Committee, subject to such restrictions and
limitations, if any, that the Committee, in its discretion, may impose on such
transfer.

         During the lifetime of the Optionee or Grantee, only he may exercise an
Option or other right or award (or any portion thereof) granted to him under the
Plan unless it has been disposed of pursuant to a QDRO. After the death of the
Optionee or Grantee, any exercisable portion of an Option or other right or
award may, prior to the time when such portion becomes unexercisable under the
Plan or the applicable Stock Option Agreement or other agreement, be exercised
by his personal representative or by any person empowered to do so under the
deceased Optionee's or Grantee's will or under the then applicable laws of
descent and distribution.

         10.2 Amendment, Suspension or Termination of this Plan. This Plan may
be wholly or partially amended or otherwise modified, suspended or terminated at
any time or from time to time by the Board or the Committee. However, without
approval of the Company's stockholders given within twelve months before or
after the action by the Committee, no action of the Committee may, except as
provided in Section 10.3, increase the limits imposed in Section 2.1 on the
maximum number of shares which may be issued under this Plan or reduce the
exercise price of an Option, and no action of the Committee may be taken that
would otherwise require stockholder approval as a matter of applicable law,
regulation or rule. No amendment, suspension or termination of this Plan shall,
without the consent of the holder of Options, Restricted Stock awards, Deferred
Stock awards, Performance Awards, Dividend Equivalents or Stock Payments,
materially alter or impair any rights or obligations under any Options,
Restricted Stock awards, Deferred Stock awards, Performance Awards, Dividend
Equivalents or Stock Payments theretofore granted or awarded, unless the award
itself otherwise expressly so provides. No Options, Restricted Stock, Deferred
Stock, Performance Awards, Dividend Equivalents or Stock Payments may be granted
or awarded during any period of

                                      -15-

<PAGE>   16

suspension or after termination of this Plan, and in no event may any Incentive
Stock Option be granted under this Plan after the first to occur of the
following events:

         (a) The expiration of ten years from the date the Plan is adopted by
the Board; or

         (b) The expiration of ten years from the date the Plan is approved by
the Company's stockholders under Section 10.4.

         10.3 Changes in Common Stock or Assets of the Company; Acquisition or
Liquidation of the Company and Other Corporate Events.

         (a) Subject to Section 10.3(e), in the event that the Committee
determines that any dividend or other distribution (whether in the form of cash,
Common Stock, other securities, or other property), recapitalization,
reclassification, stock split, reverse stock split, reorganization, merger,
consolidation, split-up, spin-off, combination, repurchase, liquidation,
dissolution, or sale, transfer, exchange or other disposition of all or
substantially all of the assets of the Company, or exchange of Common Stock or
other securities of the Company, issuance of warrants or other rights to
purchase Common Stock or other securities of the Company, or other similar
corporate transaction or event, in the Committee's sole discretion, affects the
Common Stock such that an adjustment is determined by the, Committee to be
appropriate in order to prevent dilution or enlargement of the benefits or
potential benefits intended to be made available under the Plan or with respect
to an Option, Restricted Stock award, Performance Award, Dividend Equivalent,
Deferred Stock award or Stock Payment, then the Committee shall, in such manner
as it may deem equitable, adjust any or all of

         (i) the number and kind of shares of Common Stock (or other securities
or property) with respect to which Options, Performance Awards, Dividend
Equivalents or Stock Payments may be granted under the Plan, or which may be
granted as Restricted Stock or Deferred Stock (including, but not limited to,
adjustments of the limitations in Section 2.1 on the maximum number and kind of
shares which may be issued and adjustments of the Award Limit),

         (ii) the number and kind of shares of Common Stock (or other securities
or property) subject to outstanding Options, Performance Awards, Dividend
Equivalents, or Stock Payments, and in the number and kind of shares of
outstanding Restricted Stock or Deferred Stock, and

         (iii) the grant or exercise price with respect to any Option,
Performance Award, Dividend Equivalent or Stock Payment.

         (b) Subject to Section 10.3(e), in the event of any corporate
transaction or other event described in Section 10.3(a) which results in shares
of Common Stock being exchanged for or converted into cash, securities
(including securities of another corporation) or other property, the Committee
will have the right to terminate this Plan as of the date of the event or
transaction, in which case all options, rights and other awards granted under
this Plan shall become the right to receive such cash, securities or other
property, net of any applicable exercise price.

                                      -16-

<PAGE>   17

         (c) Subject to Section 10.3(e), in the event of any corporate
transaction or other event described in Section 10.3(a) or any unusual or
nonrecurring transactions or events affecting the Company, any affiliate of the
Company, or the financial statements of the Company or any affiliate, or of
changes in applicable laws, regulations, or accounting principles, the Committee
in its discretion is hereby authorized to take any one or more of the following
actions whenever the Committee determines that such action is appropriate in
order to prevent dilution or enlargement of the benefits or potential benefits
intended to be made available under the Plan or with respect to any option,
right or other award under this Plan, to facilitate such transactions or events
or to give effect to such changes in laws, regulations or principles:

         (i) In its discretion, and on such terms and conditions as it deems
appropriate, the Committee may provide, either automatically or upon the
Optionee's request, for either the purchase of any such Option, Performance
Award, Dividend Equivalent, or Stock Payment, or any Restricted Stock or
Deferred Stock for an amount of cash equal to the amount that could have been
attained upon the exercise of such option, right or award or realization of the
Optionee's rights had such option, right or award been currently exercisable or
payable or the replacement of such option, right or award with other rights or
property selected by the Committee in its sole discretion;

         (ii) In its sole and absolute discretion, the Committee may provide,
either by the terms of such Option, Performance Award, Dividend Equivalent, or
Stock Payment, or Restricted Stock or Deferred Stock or by action taken prior to
the occurrence of such transaction or event that it cannot be exercised after
such event;

         (iii) In its sole and absolute discretion, and on such terms and
conditions as it deems appropriate, the Committee may provide, either by the
terms of such Option, Performance Award, Dividend Equivalent, or Stock Payment,
or Restricted Stock or Deferred Stock or by action taken prior to the occurrence
of such transaction or event, that, for a specified period of time prior to such
transaction or event, such option, right or award shall be exercisable as to all
shares covered thereby, notwithstanding anything to the contrary in (1) Section
4.4 or (2) the provisions of such Option, Performance Award, Dividend
Equivalent, or Stock Payment, or Restricted Stock or Deferred Stock;

         (iv) In its discretion, and on such terms and conditions as it deems
appropriate, the Committee may provide, either by the terms of such Option,
Performance Award, Dividend Equivalent, or Stock Payment, or Restricted Stock or
Deferred Stock or by action taken prior to the occurrence of such transaction or
event, that upon such event, such option, right or award be assumed by the
successor corporation, or a parent or subsidiary thereof, or shall be
substituted for by similar options, rights or awards covering the stock of the
successor corporation, or a parent or subsidiary thereof, with appropriate
adjustments as to the number and kind of shares and prices;

         (v) In its discretion, and on such terms and conditions as it deems
appropriate, the Committee may make adjustments in the number and type of shares
of Common Stock (or other securities or property) subject to outstanding
Options, Performance Awards, Dividend Equivalents, or Stock Payments, and in the
number and kind of outstanding Restricted Stock or Deferred Stock and/or in

                                      -17-

<PAGE>   18

the terms and conditions of (including the grant or exercise price), and the
criteria included in, outstanding options, rights and awards and options, rights
and awards which may be granted in the future;

         (vi) In its discretion, and on such terms and conditions as it deems
appropriate, the Committee may provide either by the terms of a Restricted Stock
award or Deferred Stock award or by action taken prior to the occurrence of such
event that, for a specified period of time prior to such event, the restrictions
imposed under a Restricted Stock Agreement or a Deferred Stock Agreement upon
some or all shares of Restricted Stock or Deferred Stock may be terminated; and

         (vii) In its discretion, and on such terms and conditions as it deems
appropriate, the Committee may make adjustments to the Performance Objectives of
any outstanding award.

         (d) Notwithstanding anything in Sections 10.3(a), 10.3(c) or 10.3(e) to
the contrary, except to the extent an award agreement expressly provides to the
contrary, in the event of a Change of Control of the Company all outstanding
awards automatically shall become fully vested immediately prior to such Change
in Control (or such earlier time as set by the Committee), all restrictions, if
any, with respect to such awards shall lapse, all performance criteria, if any,
with respect to such awards shall be deemed to have been met at their target
level.

         (e) With respect to an award intended to qualify as performance-based
compensation under Section 162(m), no adjustment or action described in this
Section 10.3, other than as provided in Section 10.3(d), shall be taken by the
Committee to the extent that such adjustment or action would cause such award to
fail to so qualify under Section 162(m) or any successor provisions thereto.

         10.4 Approval of Plan by Stockholders. This Plan will be submitted for
the approval of the Company's stockholders within twelve months after the date
of the Board's initial adoption of this Plan. Options, Performance Awards,
Dividend Equivalents or Stock Payments may be granted and Restricted Stock or
Deferred Stock may be awarded prior to such stockholder approval, provided that
such Options, Performance Awards, Dividend Equivalents or Stock Payments shall
not be exercisable and such Restricted Stock or Deferred Stock shall not vest
prior to the time when this Plan is approved by the stockholders, and provided
further that if such approval has not been obtained at the end of said
twelve-month period, all Options, Performance Awards, Dividend Equivalents or
Stock Payments previously granted and all Restricted Stock or Deferred Stock
previously awarded under this Plan, to the extent made with respect to shares in
excess of that number available for such awards immediately prior to this
amendment and restatement of the ConEmsco Plan, shall thereupon be canceled and
become null and void.

         10.5 Tax Withholding. The Company shall be entitled to require payment
in cash or deduction from other compensation payable to each Optionee, Grantee
or Restricted Stockholder of any sums required by applicable tax law to be
withheld with respect to the issuance, vesting or exercise of any Option,
Restricted Stock, Deferred Stock, Performance Award, Dividend Equivalent or
Stock Payment. Subject to the timing requirements of Section 5.3, the Committee
may, in its

                                      -18-

<PAGE>   19

discretion and in satisfaction of the foregoing requirement, allow such
Optionee, Grantee or Restricted Stockholder to elect to have the Company
withhold shares of Common Stock otherwise issuable under such Option or
afterward (or allow the return of shares of Common Stock) having a Fair Market
Value equal to the minimum tax sums required to be withheld by the Company.
Notwithstanding the foregoing, any such person who is subject to Section 16b
with respect to Company Stock may direct that the Company's tax withholding
obligation be satisfied by withholding the appropriate number of shares from
such award and/or the "constructive" tender already-owned shares of Common
Stock.

         10.6 Loans. The Committee may, in its discretion, extend one or more
loans to Employees in connection with the exercise or receipt of an Option,
Performance Award, Dividend Equivalent or Stock Payment granted under this Plan,
or the issuance of Restricted Stock or Deferred Stock awarded under this Plan,
The terms and conditions of any such loan shall be set by the Committee.

         10.7 Limitations Applicable to Section 16 Persons and Performance-Based
Compensation. Notwithstanding any other provision of this Plan, this Plan, and
any Option, Performance Award, Dividend Equivalent or Stock Payment granted, or
Restricted Stock or Deferred Stock awarded, to any individual who is then
subject to Section 16 of the Exchange Act, shall be subject to any limitations
set forth in any applicable exemptive rule under Section 16 of the Exchange Act
(including any amendment to Rule 16b-3 of the Exchange Act) that are
requirements for the application of such exemptive rule. To the extent permitted
by applicable law, the Plan, Options, Performance Awards, Dividend Equivalents,
Stock Payments, Restricted Stock and Deferred Stock granted or awarded hereunder
shall be deemed amended to the extent necessary to conform to such applicable
exemptive rule. Furthermore, notwithstanding any other provision of this Plan,
any award intended to qualify as performance-based compensation as described in
Section 162(m)(4)(C) of the Code shall be subject to any additional limitations
set forth in Section 162(m) of the Code (including any amendment to Section
162(m) of the Code) or any regulations or rulings issued thereunder that are
requirements for qualification as performance-based compensation as described in
Section 162(m)(4)(C) of the Code.

         10.8 Effect of Plan Upon Options and Compensation Plans. Except as
provided in Section 8.1, this Plan amendment and restatement shall not affect
any other compensation or incentive plans in effect for the Company or any
Subsidiary. Nothing in this Plan shall be construed to limit the right of the
Company (i) to establish any other forms of incentives or compensation for
Employees, Directors or consultants of the Company or any Subsidiary or (ii) to
grant or assume options or other rights otherwise than under this Plan in
connection with any proper corporate purpose including but not by way of
limitation, the grant or assumption of options in connection with the
acquisition by purchase, lease, merger, consolidation or otherwise, of the
business, stock or assets of any corporation, partnership, entity or
association.

         10.9 Compliance with Laws. This Plan, the granting and vesting of
Options, Restricted Stock awards, Deferred Stock awards, Performance Awards,
Dividend Equivalents or Stock Payments under this Plan and the issuance and
delivery of shares of Common Stock and the payment of money under

                                      -19-

<PAGE>   20

this Plan or under Options, Performance Awards, Dividend Equivalents or Stock
Payments granted or Restricted Stock or Deferred Stock awarded hereunder are
subject to compliance with all applicable federal and state laws, rules and
regulations (including but not limited to state and federal securities law and
federal margin requirements) and to such approvals by any listing, regulatory or
governmental authority as may, in the opinion of counsel for the Company, be
necessary or advisable in connection therewith. Any securities delivered under
this Plan shall be subject to such restrictions, and the person acquiring such
securities shall, if requested by the Company, provide such assurances and
representations to the Company as the Company may deem necessary or desirable to
assure compliance with all applicable legal requirements. To the extent
permitted by applicable law, the Plan, Options, Restricted Stock awards,
Deferred Stock awards, Performance Awards, Dividend Equivalents or Stock
Payments granted or awarded hereunder shall be deemed amended to the extent
necessary to conform to such laws, rules and regulations.

         10.10 Titles. Titles are provided herein for convenience only and are
not to serve as a basis for interpretation or construction of this Plan.

         10.11 Governing Law. This Plan and any agreements hereunder shall be
administered, interpreted and enforced under the internal laws of the State of
Texas without regard to conflicts of laws thereof.

                                      -20-

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