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5B ESTIMATED COSTS Conversion of the transfer station into a package incinerator steam power plant (including site preparation, construction, en- gineering and finance-related costs) , itemized in Table 5-2 , is estimated to cost $5 , 377 , 000 . Additional costs for electric power production, also shown on the Table, are estimated to be $630 ,000. Table 5-3 lists the personnel required to operate the resource recovery plant by job classification. No increase in personnel is necessary for electric power production. The staffing provides for a 24-hour day, 7-day per week operation. Operating and maintenance costs are presented in Table 5-4 . 5C TECHNICAL EVALUATION This section presents a discussion of important technical aspects of a resource recovery system based on the package incinerators. Technology Demonstration Energy recovery from solid wastes is a relatively new and rapidly developing technology in the United States. Research and develop- ment required to bring a specific technology to the point where it can be relied upon takes a number of years. Each new installa- tion is refined based on the successes and failures of preceding projects. Also, similar installations provide a basis for pre- dicting the performance of a system within the site specific situ- ation of a municipality. Controlled air _Package incinerators have been commercially avail- able for over a decade . These units have been predominantly batch-fed without continuous ash removal. Recently, waste heat boilers have been incorporated to allow steam or hot water produc- tion from the flue gases. Steam producing units have been in operation since 1975. Reliability The resource recovery system must be designed, constructed and operated in a manner to minimize downtime. Excessive downtime may result in having to haul refuse to a local landfill and the failure to meet energy product delivery requirements. Built-in redundancy would avoid complete system shutdown. Early package incinerator facilities were troubled with such tech- nical problems as: Combustion performance. Slagging in primary chamber resulting in ob- struction of underfire air ports. 31 -