*Pages 1--5 from 8423.xls* Waste Management Holdings, Inc. Pro Forma -Related Transactions Transaction Transaction Date Unauthorize d Action No. Licenses Sanifill of Hawaii, Inc. was merged into Waste Management of Hawaii, Inc. 9/ 29/ 00 Transfer of control 1 USA Waste of New Jersey, Inc. was merged into Waste Management of New Jersey, Inc. 9/ 29/ 00 Transfer of control 5 The stock of Klamath Disposal, Inc. was contributed by Waste Management Holdings, Inc. to Waste Management of Oregon, Inc. 9/ 1/ 00 Transfer of control 2 The stock of Cal Sierra Disposal, Inc. was contributed by Waste Management Holdings, Inc. to USA Waste of California, Inc. 9/ 1/ 00 Transfer of control 2 Waste Management of Oregon, Inc. was merged into USA Waste of Oregon, Inc. and the name of USA Waste of Oregon, Inc. was changed to Waste Management of Oregon, Inc. 8/ 17/ 00 Transfer of control 2 Nevada City Garbage Service, Inc. was merged into USA Waste of California, Inc. 6/ 1/ 00 Transfer of control 2 Miller’s Sanitary Service, Inc. was merged into USA Waste of Oregon, Inc. 3/ 31/ 00 Transfer of control 2 USA Waste of Pennsylvania, Inc. was merged into Waste Management of Pennsylvania, Inc. 3/ 31/ 00 Assignment 2 Waste Management of Connecticut, Inc. contributed assets to Waste Management New England Transport, Inc. 3/ 31/ 00 Assignment 1 Miller's Sanitary Service, Inc. was merged out of existence. 3/ 31/ 00 Assignment 2 City Environmental Services, Inc. of Romulus was merged into Waste Management of Michigan, Inc. 12/ 29/ 99 Assignment 2 Waste Management of Louisiana Holdings Two, Inc., which owned 1% of Waste Management of Louisiana, LLC, was merged into Waste Management of Louisiana Holdings One, Inc. 12/ 20/ 99 Transfer of control 7 Waste Management of Hawaii, Inc. (HI) was merged into Waste Management of Hawaii, Inc. (DE) 12/ 20/ 99 Assignment 1 Nick Raffo Garbage Co., Inc. was merged into Washington Waste Hauling & Recycling, Inc. 12/ 20/ 99 Assignment 1 North Broward Holdings Inc. was merged into Wheelabrator Environmental Systems Inc. 12/ 16/ 99 Transfer of control 2 1 Waste Management Holdings, Inc. Pro Forma -Related Transactions Transaction Transaction Date Unauthorize d Action No. Licenses South Broward Holdings Inc. was merged into Wheelabrator Environmental Systems Inc. 12/ 16/ 99 Transfer of control 1 Eastern Environmental Services, Inc. was merged into Waste Management Holdings, Inc. 12/ 16/ 99 Transfer of control 2 D& D Container, Inc. was merged into Waste Management of Utah, Inc. 12/ 16/ 99 Assignment 1 Waste Management of North America, Inc. was merged into Waste Management Holdings, Inc. 12/ 15/ 99 Transfer of control 145 The stock of S& S Grading, Inc. was contributed by Waste Management Holdings, Inc. to Chambers of West Virginia, Inc. 12/ 1/ 99 Transfer of control 1 The stock of Bayside of Marion, Inc. was contributed by Waste Management Holdings, Inc. to Waste Management, Inc. of Florida 12/ 1/ 99 Transfer of control 1 USA Waste Hauling of Philadelphia, Inc. merged into Waste Management of Pennsylvania, Inc. 12/ 1/ 99 Assignment 1 West Essex Disposal was merged into Waste Management of New Jersey, Inc. 1999 Assignment 1 USA Waste of Arizona, Inc. was merged into Waste Management of Arizona, Inc. 12/ 30/ 98 Assignment 2 United Waste Systems of Northern Arizona, Inc. was merged into Waste Management of Arizona, Inc. 12/ 30/ 98 Assignment 1 Commercial Sanitation Service, Inc. was merged into USA Waste of Kentucky LLC 12/ 30/ 98 Assignment 1 The assets of New Milford Landfill were contributed to a subsidiary of Waste Management of Connecticut, Inc., which was subsequently merged into New Milford Landfill, LLC, a subsidiary of USA Waste of Connecticut, Inc. 12/ 29/ 98 Assignment 1 Waste Management of Pinellas County, Inc. was merged into Waste Management, Inc. of Florida 12/ 29/ 98 Assignment 1 USA Waste of Arkansas, Inc. was merged into Waste Management of Arkansas, Inc. 12/ 29/ 98 Assignment 3 HCS Sanitation, Inc. was merged into Waste Management of North Dakota, Inc. 12/ 29/ 98 Assignment 1 2 Waste Management Holdings, Inc. Pro Forma -Related Transactions Transaction Transaction Date Unauthorize d Action No. Licenses Southern Waste Services Inc. was converted to a Delaware LLC as part of a 1998 entity reduction 12/ 29/ 98 Assignment 1 USA Waste of Connecticut was merged into Waste Management of Connecticut, Inc. 12/ 29/ 98 Assignment 2 United Waste Systems of Iowa, Inc. merged into Waste Management of Iowa, Inc. 12/ 29/ 98 Transfer of control 1 Dietrich Sanitary Services, Inc. was merged into Waste Management of North Dakota, Inc. 12/ 29/ 98 Assignment 1 Waste Management of Alabama, Inc. was merged into Waste Away Group, Inc. 12/ 28/ 98 Assignment 2 USA Waste Services of Alabama, Inc. was merged into Waste Away Group, Inc. 12/ 28/ 98 Transfer of control 1 West Michigan Disposal, Inc. was merged into Waste Management of Michigan, Inc. 12/ 28/ 98 Assignment 4 USA Waste of Colorado, Inc. was merged into Waste Management of Colorado, Inc. 12/ 24/ 98 Assignment 2 Colorado Waste Services, Inc. was merged into Waste Management of Colorado, Inc. 12/ 24/ 98 Assignment 1 A- 1 Transfer, Inc. was merged into Waste Management of Colorado, Inc. 12/ 24/ 98 Assignment 1 USA Waste of Delaware, Inc. was merged into Waste Management of Delaware, Inc. 12/ 23/ 98 Transfer of control 3 Commercial Disposal Co., Inc. was merged into Waste Management of Massachusetts, Inc. 12/ 23/ 98 Assignment 2 United Waste Systems of New Mexico, Inc. was merged into Waste Management of New Mexico, Inc. 12/ 23/ 98 Assignment 1 Waste Management Holdings, Inc. contributed the stock of Waste Management of Alameda County Inc. to USA Waste of California, Inc. 12/ 1/ 98 Transfer of control 6 Waste Management of North America, Inc. contributed the stock of Waste Management of Leon County, Inc. to Waste Management Inc. of Florida 12/ 1/ 98 Transfer of control 2 3 Waste Management Holdings, Inc. Pro Forma -Related Transactions Transaction Transaction Date Unauthorize d Action No. Licenses Waste Management of North America, Inc. contributed the stock of Trail Ridge Landfill Inc. to Waste Management, Inc. of Florida 12/ 1/ 98 Transfer of control 1 USA Waste of Indiana Inc. was merged into Waste Management of Indiana, LLC 12/ 1/ 98 Assignment 2 USA Waste/ Waste Management Merger 7/ 16/ 98 Transfer of control 245 USA Waste of Iowa, Inc. was merged into Waste Management of Iowa, Inc. 1998 Assignment 1 Longview of Mercer County was merged into USA Waste of New Jersey, Inc. 1998 Assignment 1 Waste Management of New York, Inc. assets were sold to Waste Management of New York, LLC 1998 Assignment 6 Waste Management of Tri- Cities Inc. was merged into Waste Management Inc. of Tennessee 12/ 31/ 97 Assignment 1 Community Refuse Ltd. was merged into Waste Management Disposal Services of Pennsylvania, Inc. 12/ 31/ 97 Assignment 1 CWM Chemical Services, Inc. was dissolved and the assets are now held by CWM Chemical Services, LLC 1997 Assignment 1 Wheelabrator Corporation was merged into Wheelabrator Water Technologies Inc. 1/ 1/ 96 Assignment 1 Waste Management of Indiana Merger Sub, Inc. was merged into Waste Management of Indiana LLC 12/ 31/ 95 Assignment 2 Waste Management of Indiana Merger Sub was merged into Chemical Waste Management of Indiana, LLC 12/ 31/ 95 Assignment 1 Waste Management of Indiana, Inc. was merged into Waste Management of Indiana Merger Sub, Inc. 12/ 15/ 95 Assignment 3 Waste Management of Kentucky Inc. was merged into Waste Management of Kentucky, LLC 8/ 7/ 95 Assignment 1 SCA Services of Indiana, Inc. was merged into SC Holdings, Inc. 12/ 31/ 92 Assignment 1 4 Waste Management Holdings, Inc. Pro Forma -Related Transactions Transaction Transaction Date Unauthorize d Action No. Licenses Waste Management of Seattle, Inc. was merged into Washington Waste Hauling and Recycling, Inc. 12/ 31/ 92 Assignment 1 Waste Management of Norwalk, Inc. was merged into Waste Management of Connecticut, Inc. 12/ 31/ 91 Assignment 1 5