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Comprehensive Revie w of S olid W aste Collection and Disposal Options v2.1 178 10/22/12 The costs and economic summaries were provided by the selected technology vendors, using some pricing assumptions for specific items provided by the planning committee and applicable to southern California only. The consultant retained by L.A. County conducted an independent review of the costs and economics provided by the vendors and concluded that the figures provided were, in general, reasonable estimates that matched with the independent assessment’s conclusions. 12.6.5 Tipping Fee Survey Exhibit 12-17 compiles costs from the 2005 and previously discussed 2007 L.A. County studies. The middle column are tipping fees summarized from the economic projections rendered in the 2005 study, which had similar pricing and cost assumptions as in the 2007 follow-on study. Tipping fees in the 2005 study ranged from $61 to $197 per ton for the eight vendors. Two plants exhibited tipping fees in the $50 to $70 per ton range, while six were higher than that. Exhibit 12 -17. Summary of Economic Data(1) Technology (2)Projected Design Capacity (TPD) (1)Calculated Tipping Fee ($/ton) (3)Calculated Tipping Fee ($/ton) Biological (Anaerobic) 100 93 58 Biological (Anaerobic) 100 67 -- Biological (Anaerobic) 100 197 -- Thermal (Autoclave) -- -- 92 Thermal (Plasma-Arc) 100 172 -- Thermal (Gasification) 150 61 58 Thermal (Gasification) 300 186 132 Thermal (Pyrolysis-Gasification) 100 129 69 (1)Excerpted and Summarized from the L.A. County, California Conversion Technology Evaluation Report, Phase I Assessment. (2)Tons per year (TPY), demonstration plant only. (3)Adjusted Tipping Fee from Exhibit 12-16, based on Phase II Study. L.A. County considered a tipping fee in the range of $50 to $70 per ton, to be competitive with the tipping fees charged by the large regional landfills serving the area. Exhibit 12-17 indicates that two of the four thermal technologies and one anaerobic technology, provided costs that indicated the plant could offer a tipping fee in the $50 to $70 per ton range. The difference in tipping fees from 2005 to 2007 probably reflects some differences in the pricing assumptions in individual studies including: proposed plant capacities were larger in 2007, and purchase pricing structure for the power produced was revised. It is also assumed that the market conditions for the development of these plants from 2005 to 2007 likely became more favorable as basic energy costs in the U.S. continued escalating. 12.6.6 Comparison to WTE Fees Because conventional WTE plant technology has been in existence for decades, with hundreds of plants operating in the U.S. and abroad, comparative cost information is more established; although a completely new WTE plant has not been constructed in the U.S. in more than 10