**Exhibit 10.66**

**NALCO HOLDING COMPANY**

**2004 STOCK INCENTIVE PLAN**

**RESTRICTED SHARES GRANT AGREEMENT**

**Steve M. Taylor**

THIS AGREEMENT, is made effective as of June 7, 2007 (the **“Grant Date”**) (thefifth business date of the month following the month of Mr. Taylor was promoted), between Nalco Holding Company (the **“Company”**) and Steve M. Taylor (the **“Participant”**). 

RECITALS: 

WHEREAS, the Company has adopted the Plan (as defined below), the terms of which are hereby incorporated by reference and made a part of this Agreement; and 

WHEREAS, the Compensation Committee of the Board of Directors of the Company (the “Committee”) has determined that the Participant be grantedthe Restricted Shares provided for herein pursuant to the Plan and the terms set forth herein. 

NOW, THEREFORE, in consideration of themutual covenants hereinafter set forth, the parties agree as follows: 

1. Definitions. Whenever the following terms are used in thisAgreement, they shall have the meanings set forth below. Capitalized terms not otherwise defined herein shall have the same meanings as in the Plan. 

(a) **“Plan”** means the Nalco Holding Company 2004 Stock Incentive Plan, as the same may be amended, supplemented or modified from time to time. 

(b) **“Restricted Shares”** means the shares of the Company’s common stock, par value $0.01 per share subject to the TimeRestrictions. 

(c) **“Time Restrictions”**means those restrictions described in Exhibit A to this Agreement.

(d) **“Vested Shares”**means those Restricted Shares that are no longer subject to Time Restrictions. 

2. Grant of Restricted Shares. The Company hereby grants to the Participant, subject to the terms and conditions of this Agreement and the Plan,Restricted Shares with a value of $400,000 as determined by the closing date price of the Nalco Holding Company Stock on the fifth business day of the month following the date of this grant, June 7, 2007. The Restricted Shares shall be subjectto the Time Restrictions and the other terms and conditions stated herein. The Closing Date Stock price for NLC on June 7, 2007 was $26.13, meaning that the size of this grant will be 15,308 Restricted Shares. 

3. Delivery of Restricted Shares. 

(a) In General. The Company shall issue a note in its electronic stock registry (without the issuance of certificates) the Restricted Shares in thename of the Participant which shall bear a legend which shall provide that: 

The shares of Nalco Holding Company are subject to the termsand restrictions of the Nalco Holding Company 2004 Stock Incentive Plan and the Restricted Shares Agreement between the Participant and the Company (the “Grant Agreement”), such shares are subject to forfeiture or cancellation under theterms of such Plan and the terms of the Grant Agreement under which the shares were issued, and such shares shall not be sold, transferred, assigned, pledged, encumbered or otherwise alienated or hypothecated except pursuant to the provision of suchPlan and the Grant Agreement, copies of which are available from the Secretary of Nalco Holding Company. 

(b) Change of Control.Notwithstanding the foregoing, upon a Change of Control, the Time Restrictions upon the Restricted Shares shall be lifted by the Company. 

(c) Termination of Service. If the Participant ceases to be an employee of the Company or its affiliates for reasons other than death or disability or retirement in accordance with the normal retirement programs at the Company, theRestricted Shares, other than Vested Shares, shall be immediately forfeited and canceled by the Company without any payment or other consideration. 

(d) Satisfaction of Time Restrictions. If the Time Restrictions are satisfied for the Restricted Shares, prior to their forfeiture and subject to the other terms and conditions stated herein, the Company shall release the legend onsuch Restricted Shares as related to the Time Restrictions. 

(d) Registration or Qualification. Notwithstanding any other provision of the Plan or thisAgreement to the contrary, absent an available exemption to registration or qualification, the Restricted Shares may not be delivered prior to the completion of any registration or qualification of the Restricted Stock Units or the Shares to whichthey relate under applicable state and federal securities or other laws, or under any ruling or regulation of any governmental body or national securities exchange that the Board or the Company’s Compensation Committee (“Committee”)shall in its sole reasonable discretion determine to be necessary or advisable. 

4. Legend on Vested Shares. The Vested Sharesissued to the Participant upon the vesting of the Restricted Shares shall be subject to such stop transfer orders and other restrictions as the Committee may deem reasonably advisable under the Plan or the rules, regulations, and other requirementsof the Securities and Exchange Commission, any stock exchange upon which such Shares are listed, any applicable federal or state laws or the Company’s Certificate of Incorporation and Bylaws, and the Committee may cause a legend or legends tobe put on any such certificates to make appropriate reference to such restrictions. 

5. Transferability. Unless otherwise determinedby the Committee, Restricted Shares may not be assigned, alienated, pledged, attached, sold or otherwise transferred or encumbered by the Participant otherwise than by will or by the laws of descent and distribution, and any such purportedassignment, alienation, pledge, attachment, sale, transfer or encumbrance shall be void and unenforceable against the Company or any Affiliate; provided that the designation of a beneficiary shall not constitute an assignment, alienation, pledge,attachment, sale, transfer or encumbrance. 

6. Withholding. The Company or its Affiliate shall have the right to withhold from anypayment due or transfer made with respect to the Restricted Shares or the Participant’s employment, any applicable withholding taxes in respect of the Restricted Shares or any payment or transfer with respect to the Restricted Shares or underthe Plan and to take such action as may be necessary in the option of the Company to satisfy all obligations for the payment of such taxes. 

7. Securities Laws. Upon the acquisition of any Vested Shares pursuant to the vesting of the Restricted Shares, the Participant will make or enter into such written representations, warranties and agreements as the Committee mayreasonably request in order to comply with applicable securities laws or with this Agreement. 

8. Notices. Any notice under thisAgreement shall be addressed to the Company in care of its General Counsel at the principal executive office of the Company and to the Participant at the address appearing in the personnel records of the Company for the Participant or to eitherparty at such other address as either party hereto may hereafter designate in writing to the other. Any such notice shall be deemed effective upon receipt thereof by the addressee. 

9. Governing Law. This Agreement shall be governed by and construed in accordance with the laws of the State of New York, without regard toconflicts of laws. 

10. Restricted Shares Subject to the Plan. By entering into this Agreement the Participant agreesand acknowledges that the Participant has received and read a copy of the Plan. The Restricted Shares the Vested Shares received upon vesting are subject to the Plan. The terms and provisions of the Plan as it may be amended from time to time arehereby incorporated by reference. In the event of a conflict between any term or provision contained herein and a term or provision of the Plan, the applicable terms and provisions of the Plan will govern and prevail 

11. Counterparts. This Agreement may be executed in any number of counterparts, each of which when so executed shall be deemed to be an originaland all of which taken together shall constitute one and the same agreement. Any counterpart or other signature hereupon delivered by facsimile shall be deemed for all purposes as constituting good and valid execution and delivery of this Agreementby such party. 

IN WITNESS WHEREOF, this Agreement has been executed and delivered by the parties hereto. 

 
NALCO HOLDING COMPANYBy 
/S/ Mary Manupella
Its: Vice President – Human Resources
/S/ Steve M. Taylor
Participant

**Exhibit A**

**Time Restrictions**

**The Participant’s Restricted Shares under this grant shall vest in the following fourequal installments:**

**On December 31, 2007, subject to all other terms and conditions in this Agreement and the Plan, the time restriction onone-fourth of the Restricted Shares shall be lifted and they shall become Vested Shares.**

**On December 31, 2008, subject to all other terms andconditions in this Agreement and the Plan, the time restriction on one-fourth of the Restricted Shares shall be lifted and they shall become Vested Shares.**

**On December 31, 2009, subject to all other terms and conditions in this Agreement and the Plan, the time restriction on one-fourth of the Restricted Shares shall be lifted and they shall become Vested Shares.**

**On December 31, 2010, subject to all other terms and conditions in this Agreement and the Plan, the time restriction on one-fourth Restricted Shares shall belifted and they shall become Vested Shares**