Document:

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                       CONFIDENTIAL TREATMENT REQUESTED
                       --------------------------------

                      BROMINATED PRODUCTS SUPPLY AGREEMENT
                      ------------------------------------

THIS BROMINATED PRODUCTS SUPPLY AGREEMENT (this "Agreement") effective as of the
____ day of _________, 2000, is by and between Great Lakes Chemical Corporation,
a corporation of the State of Delaware, with a place of business at 500 East
96/th/ Street, Suite 500, Indianapolis, Indiana, 46240 (hereinafter "Great
Lakes"), and OSCA, Inc., a company of Delaware, having an office at 156
Commission Boulevard, Lafayette, Louisiana, 70598 (hereinafter "OSCA").

                                   RECITALS:

     WHEREAS, Great Lakes produces and markets bromine and brominated products;

     WHEREAS, OSCA has global requirements for certain brominated products and
desires to have a secure supply of such products from Great Lakes;

     WHEREAS, Great Lakes and OSCA desire to enter into an agreement under which
Great Lakes would be OSCA's preferred supplier of certain brominated products;

     NOW, THEREFORE, the Parties agree as follows:

1.   DEFINITIONS

     (a)  "Annual Requirements" shall mean OSCA's global requirements for
Products for internal use and resale by OSCA or any of its affiliates or joint
ventures under common control with OSCA during the Term of this Agreement.

     (b)  "Contract Year" shall mean, with respect to the first contract year,
the period beginning on the Effective Date of this Agreement and ending on
December 31, 2000, and with respect to the second contract year and each
contract year thereafter, each successive calendar year commencing on January 1,
2001.

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     (c)  "Effective Date" shall mean the date first written above.

     (d)  "Party" or "Parties" shall mean Great Lakes and/or OSCA, as apparent
from the context in which it is used.

     (e)  "Products" shall mean the products listed on Exhibit "A" attached
hereto and made a part hereof.

     (f)  "Term" shall mean the period commencing on the Effective Date and
ending on December 31, 2004.

2.   SUPPLY OF PRODUCTS
--   ------------------

     (a)  Requirements.  Subject to the terms of this Agreement, OSCA shall
purchase and accept from Great Lakes and Great Lakes shall sell and deliver to
OSCA, at least eighty percent (80%) and, at OSCA's option, up to one hundred
percent (100%) of OSCA's Annual Requirements of Products during the Term;
provided, however, that the maximum quantity of Products that Great Lakes shall
be obligated to supply in the first Contract Year shall be the lesser of: (i)
one hundred percent (100%) of OSCA's actual requirements for Products for such
first Contract Year; and (ii) the difference between [THIS PORTION OF THE SUPPLY
AGREEMENT IS CONFIDENTIAL AND HAS BEEN FILED SEPARATELY WITH THE SECURITIES AND
EXCHANGE COMMISSION] contained bromine in the Products and the volume of
contained bromine in the quantities of Products purchased by OSCA from Great
Lakes during the period from January 1, 2000 up to the Effective Date. For each
subsequent Contract Year, the maximum quantity of Products that Great Lakes
shall be obligated to supply will be recalculated and shall be the volume of
contained bromine in the average quantity of Products purchased by OSCA from
Great Lakes during the immediately preceding three (3) years. For purposes of
the preceding sentence, OSCA's actual purchases shall be deemed to include any
quantities of Products which were supplied to OSCA by any third party due to:
(y) Great Lakes' failure or inability to to supply the Confirmed Annual Quantity
as a result of force majeure or otherwise; or (z) the purchase and sale under
this Agreement of less than 80% of OSCA's Annual Requirements pursuant to
Section 3.4 or as a result of mutual agreement of the Parties. Such maximum
quantity, calculated in any Contract Year, shall be the "Confirmed Annual
Quantity". In each Contract Year, OSCA shall purchase a quantity of Products at
least equal to fifty percent (50%) of the
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Confirmed Annual Quantity for such Contract Year, subject to Section 3.4. OSCA
understands and agrees that such agreement to purchase at least fifty percent
(50%) of the Confirmed Annual Quantity for each Contract Year shall be deemed a
take or pay obligation, and in the event OSCA fails to purchase fifty percent
(50%) of the Confirmed Annual Quantity for any Contract Year, within thirty (30)
days after the end of such Contract Year, at the election of Great Lakes, OSCA
shall accept delivery of the difference or pay to Great Lakes the purchase price
for any quantities of Products not taken.

     (b)  Annual Forecasts.  On or before each September 30 occurring during the
Term, OSCA shall furnish Great Lakes with its good faith written estimate of
OSCA's Annual Requirements by Product for the next Contract Year (the "Annual
Forecast"). OSCA may change the product mix of the Products from the previous
Contract Year, provided such change shall not affect the Confirmed Annual
Quantity for such Contract Year. Great Lakes shall use reasonable efforts to
supply the product mix requested by OSCA in its Annual Forecast and shall notify
OSCA within thirty (30) days if it is unable to do so. OSCA shall provide the
Annual Forecasts for planning purposes only and such forecasts shall not be a
binding commitment to purchase.

     (c)  Quarterly Supply.  OSCA shall place firm orders for Products
specifying the requested date of shipment. Great Lakes will use all reasonable
efforts to accommodate OSCA's shipping and scheduling requirements within the
constraints of Great Lakes' production and storage capabilities. OSCA agrees to
take and Great Lakes agrees to ship the Confirmed Annual Quantity in
substantially equal quarterly quantities; provided, however, that Great Lakes
shall not be obligated to supply more than one hundred twenty-five percent
(125%) of such equal quarterly amount within any calendar quarter. Twenty-five
(25%) percent of the Confirmed Annual Quantity is hereafter referred to as the
"Confirmed Quarterly Quantity."

     (d)  Additional Quantities.  If OSCA desires to purchase from Great Lakes
more than the Confirmed Annual Quantity in any Contract Year or more than one
hundred twenty-five percent (125%) of the Confirmed Quarterly Quantity in any
calendar quarter, OSCA will first offer to Great Lakes the opportunity to supply
such additional quantities on the terms and conditions set forth in this
Agreement. Within fifteen days (15) of receipt of notice from OSCA of its desire
to purchase additional quantities, Great Lakes will give written notice of its
decision whether to

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supply such additional quantities on the terms and conditions set forth in this
Agreement, and if Great Lakes does not agree to supply such additional
quantities or fails to give any such notice, OSCA shall have the right to
purchase such additional quantities from any third party.

     (e)  Inventory.  Great Lakes agrees to use reasonable efforts to maintain
for OSCA mini mum inventory levels of one million five hundred thousand
(1,500,000) pounds of 14.2 CaBr2 and six hundred thousand (600,000) pounds of
19.2 ZnCaBr2, but it is understood that Great Lakes will have no liability to
OSCA for any failure to maintain such inventory. In the event the foregoing
inventory levels are insufficient to support OSCA's business, the Parties agree
to negotiate in good faith with respect to other storage and/or inventory
options.

3.   PRICE
--   -----

     (a)  Price.  The price for the Products and the periodic price adjustments
shall be as set forth in Exhibit "B".

     (b)  Audits.  OSCA shall have the right to appoint, at OSCA's expense, an
independent firm of certified public accountants reasonably acceptable to Great
Lakes, for the sole purpose of verifying the accuracy of the purchase price for
Products as determined under this Article 3. Upon thirty (30) days' prior
written notice to Great Lakes and upon the accountants' execution of a
reasonable confidentiality agreement, such certified public accounting firm
shall be given access to Great Lakes' books, records and accounts, and such
other information and personnel as they may reasonably require for the sole
purpose of verifying the accuracy of the purchase price under this Article 3.
Such audits shall not occur more than once each Contract Year. OSCA's right to
audit shall survive for a period of six (6) months following any expiration or
termination of this Agreement. The decision of the auditor shall be binding on
the Parties. Should the purchase price charged by Great Lakes to OSCA be
determined by the auditors to be in error, unfavourable to OSCA, then (i) Great
Lakes shall bear the costs of the audits; and (ii) Great Lakes shall pay to OSCA
the sums determined by the auditor to be due and owing. Any sums due and owing
to OSCA shall be paid within thirty (30) days of the determination by the
auditor.

     (c)  Payment of Invoices.  For Products delivered to OSCA under this
Agreement, OSCA shall pay Great Lakes within forty-five calendar days (45) from
the date of the invoice relating thereto.

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     (d)  Meet or Release.  If, with respect to a portion of its Annual
Requirements for Products for any Contract Year following Contract Year 2, OSCA
receives a bona fide written offer for the same or similar Products on the same
or similar terms and conditions for a net price lower than the price under this
Agreement on a non-spot basis and for a duration of at least twelve (12) months,
OSCA may give written evidence to Great Lakes of such offer, and within fifteen
(15) days of receipt of such written evidence, Great Lakes, at its option, shall
agree to either match the competitive offer or release OSCA from its obligation
to purchase a maximum portion of its Annual Requirements for such Contract Year
as set forth below:

     (a)  Contract Year 3 - 40%

     (b)  Contract Year 4 - 60%

     (c)  Contract Year 5 and thereafter - 100%.

4.   TERM AND TERMINATION
--   --------------------

     (a)  Term.  This Agreement is effective as of the Effective Date and,
unless sooner terminated pursuant to the provisions of this Article 4, shall
continue in force during the Term, and thereafter this Agreement shall continue
in effect for additional successive periods of one (1) year each unless either
Party gives the other written notice of termination within twelve (12) months
prior to the expiration of the initial Term or any successive renewal term.

     (b)  Termination.  Either party may terminate this Agreement by giving the
other Party sixty (60) days written notice of such Party's material breach of
this Agreement, provided, however, that the breaching Party shall have sixty
(60) days from the expiration of the sixty day notice period in which to cure
such breach, except for the payment of any costs due and payable to the non-
breaching Party, in which event the period in which to cure shall be thirty (30)
days, whereupon the termination notice shall be considered withdrawn.

     (c)  Bankruptcy and Insolvency.  Either Party may terminate this Agreement
in the event the other Party becomes bankrupt or insolvent or makes any
assignment for the benefit of creditors, or if a trustee or receiver of its
property is appointed, or if such Party takes or is subjected to any other

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action based upon its inability to meet its financial obligations. Any such
termination shall be effective immediately upon issuance of a notice of
termination and shall be without prejudice to any other rights or remedies at
law or in equity the notifying Party may have.

     (d)  Return of Proprietary Information; Damages. In the event of a
termination pursuant to either Sections 4.2 or 4.3 above, the breaching Party
shall promptly return to the non-breaching Party all tangible forms of
Proprietary Information disclosed to it. In addition, the breaching Party shall
be liable for all damages suffered by the non-breaching Party.

5.   WARRANTY; LIMITATION OF LIABILITY

     (a)  Warranties. Great Lakes warrants title to the Products and that the
Products supplied hereunder shall conform to Great Lakes' standard
specifications for each Product in effect at the time of delivery to OSCA's
receiving plant. THESE WARRANTIES ARE EXCLUSIVE AND ARE IN LIEU OF ANY AND ALL
OTHER WARRANTIES WITH RESPECT TO THE PRODUCTS, EXPRESS OR IMPLIED, ARISING BY
LAW OR CUSTOM, INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF
MERCHANTABILITY, OR FITNESS FOR ANY PARTICULAR PURPOSE, WHETHER USED ALONE OR IN
COMBINATION WITH OTHER SUBSTANCES.

     (b)  Limitation of Liability.

     (a)  After receipt of each shipment of Products hereunder, OSCA shall
examine such Products for any damage, defect or shortage. All claims with
respect to Products for any cause whatsoever (whether such cause be based in
contract, negligence, strict liability, other tort, or otherwise) shall be
deemed waived unless made in writing and received by Great Lakes within one
hundred twenty (120) days after receipt of such Products by OSCA; provided,
however, that any claim for non-delivery of Products shall be deemed waived
unless made in writing and received by Great Lakes within thirty (30) days of
the scheduled arrival date. Failure of OSCA to give written notice of any claim
within the applicable time period shall be deemed an absolute and unconditional
waiver by OSCA of such claim.
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     (b)  In the event that any Products hereunder fail to conform to the
warranty in Section 5.1, as OSCA'S sole remedy for such failure, if OSCA has
provided timely notice of such non-conformity under Section 5.2(a), Great Lakes
shall:

               (i)   Reimburse any applicable freight expense;

               (ii)  Replace the non-conforming or defective Product with
          conforming or non-defective Products at Great Lakes' sole expense; and

               (iii) Dispose of non-conforming or defective Products at Great
          Lakes' sole expense or, if Great Lakes should refuse to dispose of
          such Products, reimburse OSCA for the reasonable expenses incurred by
          OSCA in the disposal of such Products.

     (c)  OSCA agrees to indemnify, save harmless and defend Great Lakes and its
affiliates and each of them and each of their respective officers, directors,
agents and employees (collectively, the "Great Lakes Indemnitees") from and
against all suits, actions, legal proceedings, claims, demands, damages
(including without limitation, consequential, incidental and punitive damages),
penalties, costs, reasonable expenses and attorneys' fees, to the extent caused
by, arising from, incident to, or in connection with the purchase, sale,
handling, storage, packaging, use or recycling of the Products by OSCA or any
third party, provided, however, that Great Lakes may recover consequential,
incidental and punitive damages from OSCA for the matters described in this
Section 5.2(c) only in connection with third party claims.

     (d)  Great Lakes agrees to indemnify, save harmless and defend OSCA and its
affiliates and each of them and each of their respective officers, directors,
agents and employees (collectively, the "OSCA Indemnities") from and against all
suits, actions, legal proceedings, claims, demands, damages (including without
limitation, consequential, incidental and punitive damages), penalties, costs,
reasonable expenses and attorneys' fees, based on or arising from claims of
third parties, to the extent caused by, arising from, incident to, or in
connection with the manufacture, packaging, sale or breach of warranty of the
Products by Great Lakes.
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     (e)  Except as provided in Section 5.2(c) or (d), neither Party shall be
liable for indirect, incidental, consequential or punitive damages, including
damages for lost profits and lost business opportunities.

6.   TITLE AND RISK OF LOSS

     (a)  Title and Risk of Loss. All Products sold hereunder shall be delivered
FOB Great Lakes shipping point with freight to be paid by OSCA. Title shall pass
and all risk of loss or damage is assumed by OSCA once possession of the
Products is transferred to the carrier transporting the Products to OSCA.

7.   TAXES

     (a)  Taxes. Great Lakes may add to the invoice price of Products, an amount
equal to any tax now in effect or hereafter levied, with respect to the
manufacture, sale, use or delivery of Products and imposed by law at the point
of sale or delivery of such Products (other than taxes based upon the income of
Great Lakes), including but not limited to, sales tax, use tax, retailer's
occupational tax, gross receipts tax and value added tax, in each case to the
extent payable by Great Lakes or required to be collected by Great Lakes.

8.   CONFIDENTIAL INFORMATION

     (a)  Confidential Information. It is the intention of the Parties that an
exchange of business information of the Parties related to the Products and
other business and technical information of the Parties (collectively
"Proprietary Information") may take place during the Term of this Agreement.
Recognizing that such information to be furnished by one Party to the other may
include information which the disclosing party has not publicly disclosed and
which the disclosing party considers confidential to it, the Parties agree that
all Proprietary Information disclosed by either Great Lakes or OSCA (the
"Disclosing Party") to the other (the "Receiving Party"), whether disclosed
orally or in writing, shall, for a period of seven (7) years from the date of
disclosure, be maintained in confidence by the Receiving Party and the Parties
agree that they shall not, for such same period, use the same for any purpose
except as otherwise expressly set forth in this Agreement. Except as otherwise
required by law, Proprietary Information shall include the terms and provisions
of this Agreement. Notwithstanding the above, Proprietary Information shall not
include information which:
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          (a)  Is at the time of disclosure or thereafter becomes a part of the
     public domain through no act or omission of the Receiving Party, as shown
     by tangible evidence; or

          (b)  Is in the Receiving Party's lawful, unrestricted possession prior
     to disclosure, as shown by its tangible records; or

          (c)  Is obtained by the Receiving Party lawfully and in good faith
     from a third party which did not acquire the information under an
     obligation of confidentiality running to the Disclosing Party (but subject
     to all obligations and restrictions imposed by such a third party on the
     Receiving Party); or

          (d)  Was independently developed by an employee of the Receiving Party
     who had no prior knowledge of such information.

     (b)  Disclosure of Proprietary Information. The Receiving Party may
disclose the Disclosing Party's Proprietary Information to the Receiving Party's
employees who require it for purposes of this Agreement; provided, however, that
prior to any such disclosure, such employees shall be advised of the obligations
herein contained and shall have undertaken obligations of confidentiality and
non-use with respect to such Proprietary Information no less stringent that
those set forth in this Article 8.

9.   REPRESENTATIONS AND WARRANTIES

     (a)  Representations and Warranties. Each Party represents and warrants
that it has the right to enter into this Agreement and to assume all other
obligations as set forth in this Agreement.

10.  FORCE MAJEURE

     (a)  Force Majeure. If either Party is rendered unable, wholly or in part,
to carry out any of its duties or obligations under this Agreement by reason of
(i) act of God or the public enemy, fire, explosion, perils of the sea, flood,
drought, war, riot, sabotage, embargo or (ii) without limiting the foregoing
circumstances, any circumstances of like or different character beyond the
reasonable control of the Party so failing; or (iii) interruption of or delay in
transportation, inadequacy, or shortage or failure of materials or equipment,
breakdowns, labor trouble from whatever cause
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arising and whether or not the demands of the employees involved are reasonable
and within said Party's power to concede; or (iv) compliance by either Party
with any order, action, failure to act, direction, or request of any
governmental officer, department, agency, authority or committee thereof, and
(v) whether in any case the circumstance now exists or hereafter arises, such
Party shall give prompt written notice thereof to the other Party (such notice
briefly to describe the circumstances causing such inability), and, to the
extent that the Party giving such notice is unable to perform such duty or
obligation, shall be suspended during, but no longer than the continuance of
such circumstances; provided, however, that notwithstanding the provisions of
this Article 10, the Parties shall be obligated to continue all payments due, if
any, pursuant to this Agreement.

11.  NOTICES

     (a)  Notices. Any notice required or permitted hereunder shall be in
writing and shall be sufficiently given when mailed postpaid registered or
certified mail and addressed to the Party for whom it is intended at its record
address, or delivered personally, and such notice shall be effective as of the
date it is received. The record addresses of the Parties are set forth in the
preamble of this Agreement. A Party may, at any time, substitute for its
previous record address any other address by giving written notice to the other
Party of the substitution. Copies of all notices hereunder shall also be sent to
the following offices:

          (a)  If to Great Lakes:

                    500 East 96/th/ Street, Suite 500
                    Indianapolis, IN 46240
                    Attention: Senior Vice President and General Counsel

          (b)  If to OSCA:

                    156 Commission Boulevard
                    Lafayette, LA 70598
                    Attention: President and C.E.O.
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 12. PUBLICITY
 --- ---------

     (a) Publicity.  Except as required by law, no Party hereto shall advertise,
publicize or disclose the existence of this Agreement or any provisions hereof
without the prior consent of the other Party.

 13. ASSIGNMENT
 --- ----------

     (a) Assignment.  OSCA shall not transfer or assign in whole or in part this
Agreement or any rights or interest hereunder to any third party including,
without limitation, subsidiaries, partners or affiliates without the prior
written consent of Great Lakes, which consent will not be unreasonably withheld.
Great Lakes may assign this entire Agreement to a successor in interest or to an
acquirer of all or substantially all the assets of the business to which this
Agreement pertains.  Except as previously provided herein, any purported
assignment shall be null and void.

     (b) Inurement.  This Agreement shall be binding upon and inure to the
benefit of the Parties hereto and their respective heirs, executors and
permitted successors and assigns.

 14. GOVERNING LAW
 --- -------------

     (a) Governing Law.  This Agreement and the terms herein shall be governed
and construed in accordance with the laws of the State of Delaware, disregarding
any conflicts of law provisions which may dictate the application of the laws of
another jurisdiction.

 15. WAIVER
 --- ------

     (a) Waivers.  The failure of either Party to exercise the rights or
remedies available under this Agreement shall not be considered a waiver of such
rights or remedies and shall not preclude the subsequent exercise thereof. All
waivers and consents given hereunder shall be in writing. No waiver by either
Party hereto of any breach or anticipated breach of any provision hereof by the
other Party shall be deemed a waiver of any other contemporaneous, preceding or
succeeding breach or anticipated breach, whether or not similar, on the part of
the same or any other Party.

 16. SEVERABILITY
 --- ------------
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     (a) Severability.  In the event any provision of this Agreement is finally
determined by a court of competent jurisdiction to be unenforceable or void,
then such provision thereof shall be deemed deleted and the balance of this
Agreement shall remain in full force and effect; provided, however, that if such
deletion frustrates the intent of the Agreement, the Parties shall enter into
negotiations in good faith in an effort to reach agreement eliminating such
frustration.

17.  ENTIRE AGREEMENT; AMENDMENT

     (a)  Entire Agreement. This document and the Exhibits attached hereto
constitute the entire agreement and understanding between the Parties hereto
with respect to the subject matter hereof, and merge and supercede any and all
prior written or oral discussions, understandings, commitments or agreements
relating thereto. Unless otherwise expressly set forth in this Agreement, no
warranties, express or implied, are made, and no statement, promises or
inducements made or offered by any Party or any agent or representative thereof
shall be valid or binding. Except as otherwise provided herein, neither Party
shall be bound by any provisions additional to or at variance with the terms
hereof that may appear in any prior or later communication of the other Party or
in a purchase order form of OSCA, or any order acknowledgment form, invoice,
bill of lading or other form.

     (b)  Amendment. This Agreement may not be amended or modified except in
writing by a duly authorized representative of each Party hereto.

     IN WITNESS WHEREOF, Great Lakes Chemical Corporation and OSCA, Inc. have
caused this Agreement to be executed by their respective duly authorized
representative.

Great Lakes Chemical Corporation         OSCA, Inc.

By: _____________________________        By: __________________________

Name:___________________________         Name:     _______________________
          (Print or Type)            (Print or Type)

Title:____________________________              Title: ________________________
<PAGE>

                                   EXHIBIT "A"
                                    PRODUCTS

14.2 PPG Calcium Bromide 52% Cabr. Liquid
Calcium Bromide Dry 95% Cabr
19.2 PPG Zinc Calcium Bromide Liquid 75.6% CaZnbr
12.5 PPG Sodium Bromide Liquid 45% Nabr
Sodium Bromide Dry 97% Nabr
<PAGE>

                                  EXHIBIT "B"

                           PRICE AND PRICE ADJUSTMENT
                           --------------------------

(a)    Price. The price for the Products shall be Great Lakes' actual fully
allocated costs, including depreciation, of producing such Products at its
existing South Arkansas facilities, plus [THIS PORTION OF THE SUPPLY AGREEMENT
IS CONFIDENTIAL AND HAS BEEN FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
COMMISSION].  The price invoiced to OSCA for each shipment of Products hereunder
shall be Great Lakes' standard product cost, as of the beginning of the
applicable calendar year, for each Product produced at the existing South
Arkansas facilities, plus [THIS PORTION OF THE SUPPLY AGREEMENT IS CONFIDENTIAL
AND HAS BEEN FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION]. The
prices shall be subject to adjustment as provided in paragraph (b) of this
Exhibit "B". No later than November 30 in each year, Great Lakes will give OSCA
written notice of the standard product cost for each Product applicable to the
next year.

(b)    Quarterly Adjustments.  On a quarterly basis, the invoiced price for the
Products shipped during any calendar quarter shall be adjusted retroactively up
or down to reflect Great Lakes' actual fully allocated costs, including
depreciation, for such Products produced at Great Lakes' existing South Arkansas
facilities. Within thirty (30) days after the end of each calendar quarter,
Great Lakes will give written notice of such adjustment to OSCA.  Within thirty
(30) days of the date of such written notice, if the actual costs are higher
than the invoiced amount, OSCA shall pay such difference to Great Lakes; or, if
the actual costs are lower than the invoiced amount which was actually paid by
OSCA, Great Lakes shall refund the difference to OSCA.  Notwithstanding the
foregoing, Great Lakes shall not be obligated to pass on to OSCA cost savings
which may result from synergies in connection with a change in the structure,
ownership, or business combination of Great Lakes' existing South Arkansas brine
or bromine operations, or new technologies for the mining or manufacture of
bromine or the manufacture of bromine products, which may be developed or
acquired by Great Lakes.
<PAGE>

(c)     Definition of Costs.  For purposes of paragraphs (a) and (b) above,
"fully allocated costs" shall mean the actual costs of raw materials used in the
manufacture of the Products and allocated costs of labor, manufacturing
conversion and utilities applicable to the production lines, as listed below,
utilized by Great Lakes at its existing South Arkansas facility for production
of the Products. The quarterly adjustments referred to in paragraph (b) of this
Exhibit "B" shall consist of the favorable and unfavorable production line
variances of the production lines listed below.  The costs and the variances
shall be allocated to such production lines in accordance with Great Lakes'
current methodology, and any future changes in the methodology shall be made in
good faith by Great Lakes and shall be communicated in advance to OSCA.  The
production lines referred to above are as follows:

     (i)    ELD11040 Zinc Ca Filtration;
     (ii)   ELD11080 CaBr Line incl Absor;
     (iii)  ELD11190 CaBr Absorber @FC;
     (iv)   ELD11350 Spray Dryer Line;
     (v)    ELD18250 Boilerhouse/Central;
     (vi)   ELD21650 NaBr Line South;
     (vii)  ELD21660 NaBr Line II South;
     (viii) ELD28600 Boiler/South.<PAGE>

                                   OSCA, INC.

                        2000 INCENTIVE COMPENSATION PLAN

                         January 1 - December 31, 2000

<PAGE>

                                   OSCA, INC.

                        2000 INCENTIVE COMPENSATION PLAN

Purpose and Objectives
----------------------

The purpose of the Incentive Compensation Plan (Plan) is to contribute to the
motivation of key management employees in accomplishing the business goals of
the Company and its business units so the Company will continue to prosper and
profitably serve its various constituents.

The objectives of the Plan are as follows:

 .  Clearly communicate and reinforce EVA goals.

 .  Provide a competitive incentive for achievement of EVA goals.

 .  Establish a reasonably objective basis for determining annual awards.

Plan Definitions
----------------

Certain words or phases used in this plan document are defined as follows:

 .  Company - OSCA and its subsidiaries.

 .  Business Unit - Any designated organizational entity, division or business
   unit within the Company.

 .  Award - An annual incentive compensation award.

 .  Base Salary - Annual Salary as of 12/31 of the Plan year.

 .  EVA - Economic Value Added (net operating profit after taxes) minus (cost of
   capital x capital employed).

 .  Capital Employed - Average capital used in the business to produce revenue
   and profits of the business.

 .  Target Award - An incentive compensation award earned by a participant based
   on achieving EVA target objectives and individual performance objectives
   during the plan year which represents payment at 100%.

 .  Plan Year - The period from January 1 - December 31 of each calendar year.

                                       2
<PAGE>

Eligibility
-----------

Participants include key management positions that significantly influence the
performance of the Company.  Participants are identified and recommended by the
head of each Business Unit or Corporate function, subject to the approval of the
Incentive Compensation Review Committee.  Prior eligibility does not guarantee
continued participation where individual performance does meet appropriate
performance expectations.

Administration
--------------

The Compensation and Incentive Committee (C&IC) of the Board has ultimate
authority over the Plan, is responsible for approving the Plan and may alter any
provision of the Plan or terminate the Plan at any time. The Compensation and
Incentive Committee of the Board will directly administer the Plan with respect
to all participants in the plan except for the CEO.  Specific responsibilities
of this Committee include:

     .  Approving Annual Incentive Compensation Plan.

     .  Approving Corporate and Business Unit performance objectives.

     .  Determining incentive compensation award percentages.

     .  Approving incentive compensation awards.

The Incentive Compensation Review Committee, consisting of the Chief Executive
Officer and the Vice President, Human Resources will make recommendations to the
C&IC and resolve questions regarding the interpretation of the Plan.

Target Award Levels
--------------------

The target incentive awards for each eligible position (by category) are
expressed as a percentage of base salary as follows:

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<CAPTION>
================================================================================
           ELIGIBLE POSITION                          TARGET INCENTIVE AWARD
--------------------------------------------------------------------------------
<S>                                                   <C>
CEO                                                             60%
--------------------------------------------------------------------------------
Executive Vice President, Vice Presidents                     30%-40%
--------------------------------------------------------------------------------
Directors and Key Management Employees                        7.5%-25%
================================================================================
</TABLE>

Payout Ranges
-------------

Payout ranges are based upon target incentive award and are expressed as a
percentage of base salary as follows:

<TABLE>
<CAPTION>
================================================================================
                             MINIMUM            TARGET           MAXIMUM
--------------------------------------------------------------------------------
<S>                          <C>                <C>              <C>
OSCA EVA                        0%               100%           Unlimited
--------------------------------------------------------------------------------
Individual Discretionary        0%               100%              200%
================================================================================
</TABLE>

Awards will be interpolated between minimum and maximum.  The individual
discretionary portion for OSCA participants cannot average more than 100%;
however, individual percentages can range from 0% to 200%.

                                       3
<PAGE>

As an incentive to increase shareholder value, EVA payouts, based upon actual
results, are uncapped.  Actual EVA results in excess of 200% will be converted
to OSCA Restricted Stock Units (RSU's) and presented to the ICP participant with
a three year cliff vesting period.  For example, if employee A obtains 400% of
their EVA target, the following calculation would occur to determine RSU's:

     Employee A Base Salary                  $75,000
     Employee A Target Incentive Award       20%
     Employee A OSCA Budgeted EVA            75% of 20% = 15%
     OSCA Share Price                        $25
     OSCA EVA results                        400%

     OSCA Budgeted EVA percentage for Employee A of 15% X OSCA EVA results in
     excess of 200% (400% - 200% = 200%) 200% X Employee A base salary $75,000
     divided by OSCA Share Price $25 = 900 RSU's that will vest 3 years from
     date of issue.  In summary, the calculation is as follows: 15% X 200% =
     30% X $75,000 salary = $22,500 / 25 per share = 900 RSU's.

As you can see from this example, Employee A not only received a $22,500 cash
payout (15% X 200% X $75,000) for excellent business results but also received
900 RSU's.  The RSU's could increase in value depending upon the company's
performance over the next three years.  In addition to the cash payout and
restricted stock units for business results under this example, the
participant's bonus will also include an individual award based on results.

Determination of Awards
-----------------------

Awards will be determined as follows:

<TABLE>
<CAPTION>
==========================================================================
                              OSCA                INDIVIDUAL DISCRETIONARY
                               EVA                       COMPONENT
--------------------------------------------------------------------------
<S>                           <C>                 <C>
All Participants               75%                          25%
==========================================================================
</TABLE>

EVA performance will be measured by financial or strategic measures that are:

     .  Clearly defined and understandable.

     .  Important measures of the degree to which strategic goals and objectives
        of the organization are accomplished.

     .  Under the control or influence of the executive.

Distribution of Incentive Compensation
--------------------------------------

Awards under the Plan are to be paid to a participant in cash as soon as
financial performance is determined and individual performance can be assessed.
Awards will typically be paid no later than March 15th following the close of a
Plan year.

A participant must be actively employed by the company in a qualifying position
on the date the bonus is paid to receive an incentive award, however, eligible
participants hired or promoted to an eligible position during the Plan year may
receive a pro-rated incentive award (based on salary earned in the Plan year

                                       4
<PAGE>

while in the eligible position) if they are approved by the Chief Executive
Officer.

In the event that a participant's employment is terminated prior to the end of
the Plan year due to death, disability, or retirement, the participant or
beneficiary will be entitled to receive a pro rata share of the award that would
have been earned if employment had continued to the end of the Plan year,
subject to the approval of the Incentive Compensation Review Committee.

A participant may not receive an incentive award due to poor individual
performance or misconduct and may no longer be eligible under the ICP.

Distribution of Restricted Stock Units
--------------------------------------

A participant must be actively employed by the company on the date the
restricted stock unit award vest to receive such award.  Non vested awards will
lapse upon termination of employment.

In the event that a participant's employment is terminated prior to the end of
the vesting period due to death, disability, or retirement, the participant or
beneficiary will be entitled to receive a pro rata share of the award that would
have vested if employment had continued to the end of the vesting period,
subject to the approval of the Incentive Compensation Review Committee.

General Provisions
------------------

Limitations on Vested Interest

     It is understood that the awarding of incentive compensation hereunder is
     within the sole discretion of OSCA, and that no participant has any vested
     interest in an award under the Plan until such award has been approved by
     the Compensation and Incentive Committee.

Participants may be deleted from or added to the Plan each year at the sole
discretion of the Company.

Employment Rights

     The Plan does not give any employee the right to be retained in the employ
     of the Company.  Specifically, the Plan does not create an employment
     contract for the Plan year or any part thereof.

Non-Assignment

     Incentive compensation payments may not be pledged, assigned or transferred
     for any reason.

Withholding

     Any taxes required to be withheld by Federal, State or Local Regulations
     will be deducted from incentive compensation payments hereunder.

                                       5
<PAGE>

Discontinuance, Suspension or Amendment of the Plan

     The Company, with the approval of the Compensation and Incentive Committee,
     may discontinue or suspend the Plan at any time, or amend the Plan in any
     respect.  The Company may review the Plan and its administration at any
     time to determine whether the objectives of the Plan continue to be met.
     Where appropriate, the Incentive Compensation Review Committee of the
     Company may make changes in the Plan with the approval of the Compensation
     and Incentive Committee of the Board of Directors.

                                       6

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