Appendices to Integrated Resources & Solid Waste Management Plan - Dec 2009

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TECHNICAL MEMORANDUM CH2MHILL Hawai'i County Mechanical - Biological Treatment Facility Conceptual Design PREPARED FOR: Mike Dworsky, Solid Waste Division Chief, County of Hawai i PREPARED BY: Scott Gamble, CH2M HILL Ron Alexander, Alexander and Associates DATE: May 12, 2009 PROJECT NUMBER: 37412$.11.01 Introduction As outlined in the draft Residuals Management Chapter of the County of Hawaii Integrated Resources and Solid Waste Management Plan (IRSWMP) Update, there is enough operating history within Europe and North America for the County of Hawaii to evaluate the potential for developing one or more mechanical- biological treatment (MBT) facilities to process solid wastes generated by island residents and businesses. This memorandum assumes that two MBT facilities would be developed: one in East Hawaii at the South Hilo Sanitary Landfill (SHSL) site, and a second facility at the West Hawaii Sanitary Landfill (WHSL) site. Conceptually, both facilities would accept and process municipal solid waste (MSW) from the existing transfer station network and from commercial sources on the island. In response to discussions and the need for further analyses around how mechanical - biological treatment of MSW could be integrated into the IRSWMP, CH2M HILL has prepared this conceptual design report for the two- facility concept. The purpose of the conceptual design report is to: • Provide a summary of the current and estimated future waste tonnages available for diversion through the facilities. • Outline the performance and functional requirements for the two facilities including the identification of the appropriate processing technology and equipment requirements, environmental protection measures, nuisance controls, product quality, and product market issues. • Develop conceptual layouts for each facility. • Develop order -of- magnitude capital cost estimates for each facility.