Letter Agreement Dated August 7, 2007 Between Suntrust Bank And Foundry Park I, LLC

SunTrust

3333 Peachtree Road, N.E.

Center Code 3913

Atlanta, Georgia 30326

Member NASD and SIPC

August 7, 2007

Confirmation of Swap Transaction

THIS LETTER AGREEMENT SHOULD BE REVIEWED, EXECUTED BY AN AUTHORIZED PERSON(S), AND RETURNED IMMEDIATELY VIA FAX TO 404-926-5827 OR 404-926-5826 .

(Please direct any questions to Faraz Ansari at 404-926-5819.)

David Fiorenza

Vice President &

Principal Financial Officer at NewMarket Corporation

Foundry Park I, LLC

330 South 4th St.

Richmond, Virginia 23219

Ph#: 804-788-5055

Fax#: 804-788-5435

REF: 120716

Dear Mr. Fiorenza:

The purpose of this Confirmation is to set forth the terms and conditions of the Swap Transaction entered into between SunTrust Bank ("SunTrust") and Foundry Park I, LLC ("Counterparty") on the Trade Date specified below. The definitions and provisions contained in the 2000 Definitions published by the International Swaps and Derivatives Association, Inc. ("ISDA"), as amended and supplemented from time to time (the "Definitions"), are incorporated by reference into this Confirmation. In the event of any inconsistency between the Definitions and this Confirmation, this Confirmation will govern.

This Confirmation evidences a complete and binding agreement as to the terms of the Swap Transaction. SunTrust and the Counterparty agree to use all reasonable efforts promptly to execute and deliver an agreement in the form of the ISDA Master Agreement (Multicurrency-Cross Border) (the "ISDA Form"), with such modifications as the parties will in good faith agree. Upon the execution of the ISDA Master Agreement, as amended and supplemented from time to time (the "Agreement"), this Confirmation will supplement, form a part of, and be subject to the Agreement. All provisions contained in or incorporated by reference in the Agreement upon its execution will govern this Confirmation except as expressly modified below. Until such execution, this Confirmation will supplement, form a part of, and be subject to an agreement in the form of the ISDA Form as if it had been executed in such form (but without any Schedule, except for the election of the laws of the State of New York as the gove rning law) on the Trade Date.


1. The terms of the particular Swap Transaction to which this Confirmation relates are as follows:

Notional Amount: See attached Schedule A

Trade Date: August 7, 2007

Effective Date: August 7, 2007

Termination Date: January 1, 2010, with adjustment in accordance with the Modified Following Business Day Convention

Business Days: New York and London

Calculation Agent: SunTrust

Fixed Amounts

Fixed Rate Payer: Counterparty

Fixed Rate Payer Payment Dates: The 1st day of each month, beginning September 1, 2007, through and including the Termination Date, subject to adjustment in accordance with the Modified Following Business Day Convention

Fixed Rate: 4.975% per annum

Fixed Rate Day Count Fraction: Actual/360

Adjustment to Period End Dates: Applicable

Floating Amounts

Floating Rat ...