text: During 2004, 2003 and 2002, $28.2 million, $27.7 million and $5.1 million, respectively, of the total 
  purchase price paid for acquisitions and contingent payments to former owners was allocated to landÑll 
  airspace. For landÑlls purchased as part of a group of several assets, the allocations of purchase price were 
  based on the discounted expected future cash Öow of each landÑll relative to other assets within the acquired 
  group and were adjusted for other non-depletable landÑll assets and liabilities acquired (primarily Ñnal 
  capping, closure and post-closure liabilities). LandÑll purchase price is amortized using the units-of- 
  consumption method over total available airspace, which includes probable expansion airspace where 
  appropriate, and is included in property and equipment, net in the accompanying Consolidated Balance 
  Sheets. 
  
  The following summarizes the preliminary purchase price allocations for business combinations ac- 
  counted for under the purchase method of accounting: 