text: **REPUBLIC SERVICES, INC. AND SUBSIDIARIES**
  
  **NOTES TO CONSOLIDATED FINANCIAL STATEMENTS**
  **(All tables in millions, except per share data) Ì (Continued)**
  
  and accounting personnel to annually adjust the Company's rates used to expense capitalized costs. Changes 
  in these estimates primarily relate to changes in available airspace, inÖation and applicable regulations. 
  Changes in available airspace include changes due to the addition of airspace lying in probable expansion 
  areas. 
  
  **Total Available Disposal Capacity**
  
  As of December 31, 2004, the Company owned or operated 58 solid waste landÑlls with total available 
  disposal capacity of approximately 1.7 billion in-place cubic yards. Total available disposal capacity represents 
  the sum of estimated permitted airspace plus an estimate of expansion airspace that the Company believes has 
  a probable likelihood of being permitted. 
  
  **Probable Expansion Airspace**
  
  Before airspace included in an expansion area is determined as probable expansion airspace and, 
  therefore, included in the Company's calculation of total available disposal capacity, the following criteria 
  must be met: 
  
  1. The land associated with the expansion airspace is either owned by the Company or is controlled 
  by the Company pursuant to an option agreement; 
  
  2. The Company is committed to supporting the expansion project Ñnancially and with appropriate 
  resources; 
  
  3. There are no identiÑed fatal Öaws or impediments associated with the project, including political 
  impediments; 
  
  4. Progress is being made on the project; 
  
  5. The expansion is attainable within a reasonable time frame; and 
  
  6. The Company believes it is likely the expansion permit will be received. 