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Landfill gas generation and recovery from the North Eubanks MSW Landfill is considered to be <br />more unpredictable and only marginally feasible because of the length time that waste has been in <br />place, the fact that the facility is unlined, and the nature of some of the waste disposed (lower gas <br />production and heating values resulting from ash and C &D disposal) <br />Based upon the results of this study, implementation of a landfill gas recovery project at the <br />Eubanks Road disposal facilities is not economically feasible based on the sale of electricity or <br />pipeline grade gas only Additional large waste heat recovery users (school, industrial process, <br />commercial building complex, etc.) would be required to capitalize on the cogeneration potential <br />(waste heat recovery) of internal combustion engine or microturbine electric power generation and <br />make landfill gas recovery more economically attractive. <br />If development of the proposed school complex or other significant energy user occurs in the <br />immediate vicinity of the Eubanks Road site, the feasibility of landfill gas recovery would be <br />significantly improved given the potential for this type of facility to make use of both the <br />electricity and heat created during power production. In this situation landfill gas could become a <br />clean efficient energy source rather than an environmental liability even when generated in <br />relatively small quantities as projected for the Eubanks Road disposal sites. <br />Given the beneficial impact of additional energy use on the feasibility of landfill gas recovery, the <br />County should further evaluate landfill gas utilization in the design of the school(s), animal shelter, <br />and /or other proposed facilities for electric and heating purposes. The following additional <br />information relative to each potential user will be required in order to provide a more <br />comprehensive evaluation of landfill gas use potential from the existing Eubanks Road site: <br />proposed facility implementation schedule, start -up date, heating loads, electricity demand, <br />seasonal load and demand variations, sustainable landfill gas production, and availability and costs <br />of supplemental fuels <br />By producing electricity and heat during power production, microtubine technology is highly <br />suited to landfill gas recovery applications, and is considered an emerging system technology that <br />is likely to improve in terms of economic feasibility as the result of ongoing product development <br />and commercial use experience (landfill gas -to- energy). <br />The microturbine offers the following advantages when compared to other types of landfill gas <br />utilization and power generation technologies: <br />Portable and Easily Sized — Microturbines are modular and available in incremental <br />capacities for multiple -unit stacks, so that single or multiple microturbines can be <br />configured to adapt to gas flow and satisfy on -site power requirements. <br />Orange County 8 March 2006 <br />Draft <br />