0000950129-04-004461 8-K/A 2 20040628 5 7 20040628 WASTE MANAGEMENT INC 0000823768 4953 731309529 DE 1231 8-K/A 34 001-12154 04885915 1001 FANNIN STREET STE 4000 HOUSTON TX 77002 7135126200 1001 FANNIN STREET SUITE 4000 HOUSTON TX 77002 USA WASTE SERVICES INC 19920703 8-K/A 1 h16456ae8vkza.htm WASTE MANAGEMENT, INC.- JUNE 28, 2004 EX-5.1 2 h16456aexv5w1.htm OPINION OF JOHN S. TSAI