X0303 4 2008-09-19 0001060391 REPUBLIC SERVICES INC RSG 0001052192 CASCADE INVESTMENT LLC 2365 CARILLON POINT KIRKLAND WA 98033 0 0 1 0 0000902012 GATES WILLIAM H III ONE MICROSOFT WAY REDMOND WA 98052 0 0 1 0 Common Stock 2008-09-19 4 P 0 240695 32.2796 A 33925641 D Common Stock 2008-09-19 4 P 0 70105 32.8674 A 33995746 D Common Stock 2008-09-19 4 P 0 45800 33.8783 A 34041546 D Common Stock 2008-09-19 4 P 0 1500 34.814 A 34043046 D Common Stock 2008-09-19 4 P 0 25000 36.30 A 34068046 D This transaction was executed in multiple trades at prices ranging from $31.72 to $32.71. The price reported above reflects the weighted average purchase price. The reporting persons hereby undertake to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected. This transaction was executed in multiple trades at prices ranging from $32.72 to $33.70. The price reported above reflects the weighted average purchase price. The reporting persons hereby undertake to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected. This transaction was executed in multiple trades at prices ranging from $33.72 to $34.50. The price reported above reflects the weighted average purchase price. The reporting persons hereby undertake to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected. This transaction was executed in multiple trades at prices ranging from $34.77 to $35.04. The price reported above reflects the weighted average purchase price. The reporting persons hereby undertake to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected. * Duly authorized under Special Power of Attorney appointing Michael Larson attorney-in-fact, dated February 3, 2006, by and on behalf of William H. Gates III, filed as Exhibit 99.1 to Cascade Investment, L.L.C.'s Amendment No. 2 to Schedule 13G with respect to Arch Capital Group Ltd. on March 7, 2006, SEC File No. 005-45257, and incorporated by reference herein. Cascade Investment, L.L.C. By: /s/ Michael Larson, Business Manager 2008-09-23 William H. Gates III By: /s/ Michael Larson*, Attorney-In-Fact 2008-09-23