0000950129-07-002397 8-K 2 20070509 8.01 9.01 20070509 20070509 WASTE MANAGEMENT INC 0000823768 4953 731309529 DE 1231 8-K 34 001-12154 07831557 1001 FANNIN STREET STE 4000 HOUSTON TX 77002 7135126200 1001 FANNIN STREET SUITE 4000 HOUSTON TX 77002 USA WASTE SERVICES INC 19920703 8-K 1 h46540e8vk.htm FORM 8-K - CURRENT REPORT EX-5.1 2 h46540exv5w1.htm OPINION OF AMANDA K. MAKI