THE CORPORATE LIBRARY

Related Party Transactions and Outside Related Director Information

Nalco Holding Company (NLC)

3/14/2006 Proxy Information

Mr. Chu is associated with one of the Company’s Sponsors: The Blackstone Group; Mr. Chu is a Senior Managing Director of Blackstone. Mr. Harris is associated with one of the Company’s Sponsors: Apollo Management L.P.; Mr. Harris is a founding partner of Apollo Management. Mr. Mehra is associated with one of the Company’s Sponsors: GS Capital Partners; Mr. Mehra is a Managing Director of Goldman, Sachs & Co.'s Principal Investment Area and a member of its Investment Committee.

3/28/2005 Proxy Information

Mr. Chu and Mr. O'Neill are associated with our Sponsor: The Blackstone Group; Mr. Chu is a Senior Managing Director of Blackstone, and Mr. O'Neill is a Special Advisor at Blackstone. Mr. Black and Mr. Harris are associated with our Sponsor: Apollo Management L.P.; Mr. Black is a founding partner of Apollo Advisors L.P. and Apollo Real Estate Advisors, and Mr. Harris is a founding partner of Apollo Management. Mr. Friedman and Mr. Mehra are associated with our Sponsor: GS Capital Partners; Mr. Friedman is head of Goldman, Sachs & Co.'s Merchant Banking Division, head of Goldman, Sachs & Co.'s Principal Investment Area, Chairman of the Merchant Banking Division's Investment Committee and a member of Goldman, Sachs & Co.'s Management Committee, and Mr. Mehra is a Managing Director of Goldman, Sachs & Co.'s Principal Investment Area and a member of its Investment Committee.