X0202 4/A 2006-02-15 2006-02-17 1 0001298341 Nalco Holding CO NLC 0001306507 Chu Chinh C/O THE BLACKSTONE GROUP 345 PARK AVENUE NEW YORK NY 10154 0 0 0 1 Former Director Common Stock 2006-02-15 4 A 0 3670 0 A 0 D Award of restricted stock units which shall be vested January 1, 2008, subject to the terms and conditions set forth in the restricted stock unit agreement. Each restricted stock unit represents the right to receive one share of the Issuer's common stock on a 1-for-1 basis, subject to the terms and conditions set forth in the restricted stock unit agreement. This amendment is being filed to reflect that the Reporting Person had no beneficial ownership as defined in Rule 16a-1(a)(2)(i) under the Securities Exchange Act of 1934, as amended, in the securities reported herein. The securities were issued to Blackstone Management Partners IV L.L.C., the Investment Advisor to certain of the Blackstone entities formerly invested in the Issuer with which entities the Reporting Person was affiliated. /s/ Chinh E. Chu 2007-05-16