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

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SECTION 1 Introduction The County of Hawaii is updating its Integrated Solid Waste Management Plan. The plan will examine waste management options in the County. To aid in the evaluation of these options, CH2M HILL conducted this waste composition study to provide statistically valid data on the types and quantities of waste currently being disposed of at the West Hawai i (Pu'uanahulu) Landfill. The field work for this study was performed by Sky Valley Associates. This report presents the results of the waste composition study, which include composition estimates, both for the overall waste stream and for the transfer station, commercial, and self -haul wastes disposed at the landfill. The results are based on samples taken during May of 2008. A similar study was performed at the South Hilo Landfill in 20011. We have used the results of that study to represent the composition of waste that enters the East Hawaii landfill. The results are combined to provide waste composition estimates for total County disposal. There are four major sections of this report. Section 1 briefly summarizes the project, including a description of the sources of disposed waste and the project methodology. Sections two through four provide sampling results for the overall waste stream; results for the transfer station, commercial, and self -haul substreams; and substream estimates for West Hawaii and East Hawai i. Following the main body of the report are attachments that included detailed sampling results (Attachments A and B), descriptions of waste components (Attachment C), descriptions of the sampling methodology and calculations (Attachment D), and field sampling forms (Attachment E). 1.1 Sources of Disposed Waste For analysis and planning purposes, landfill disposal quantities can be divided into substreams. A waste substream is defined according to its source of generation, its means of collection and transport to the disposal facility, or both2. For the purposes of this study, the waste disposed at the West Hawaii Landfill was divided into the following three substream categories: Transfer Station - This is waste hauled from one of nine transfer stations on the west side of the Island. It is transported to the West Hawaii Landfill in transfer station compactor boxes. Transfer station loads are composed primarily of residential waste. 1 Cascadia Consulting Group, 2001. Waste Composition Study, South Hilo Landfill, County of Hawaii. 2 It should be noted that this study estimates the composition of waste disposed, not waste generated. Waste generation is equal to the sum of both the disposed and recycled amounts. APPX B_WASTE COMPOSITION REPORT_121709.DOC