0000950129-08-002482 10-Q 6 20080331 20080429 20080429 WASTE MANAGEMENT INC 0000823768 4953 731309529 DE 1231 10-Q 34 001-12154 08783701 1001 FANNIN STREET STE 4000 HOUSTON TX 77002 7135126200 1001 FANNIN STREET SUITE 4000 HOUSTON TX 77002 USA WASTE SERVICES INC 19920703 10-Q 1 h56154e10vq.htm FORM 10-Q - QUARTERLY REPORT EX-12 2 h56154exv12.htm COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES EX-31.1 3 h56154exv31w1.htm CERTIFICATION PURSUANT TO RULE 15D-14(A) EX-31.2 4 h56154exv31w2.htm CERTIFICATION PURSUANT TO RULE 15D-14(A) EX-32.1 5 h56154exv32w1.htm CERTIFICATION PURSUANT TO SECTION 1350 EX-32.2 6 h56154exv32w2.htm CERTIFICATION PURSUANT TO SECTION 1350