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

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SECTION 2 COUNTYWIDE SAMPLING RESULTS Clean and treated lumber accounts for 8.8% by weight in West Hawaii versus 14.3% in East Hawaii. • Food accounts for 17.7% by weight in West Hawaii versus 12.8% in East Hawai'i. Exhibit 2 -7 shows a summary comparison of composition and quantities for the nine main waste categories for West Hawaii and East Hawai'i. 2.2 Comparison of Hawaii County Composition to U.S. Average Exhibit 2 -8 provides an aggregated comparison of the Hawaii County disposed waste stream with the U.S. average, as compiled by the US Environmental Protection Agency (EPA). The data are shown in aggregated form because the EPA data is grouped somewhat differently and excludes construction and demolition debris. As shown, Hawaii County's disposed waste stream includes somewhat more paper, metal, and organics and somewhat less plastic and glass than U.S. averages. 2.3 Transfer Station, Commercial, and Self -Haul Substreams Exhibits 2 -9, 2 -10, and 2 -11 are bar charts that show the overall composition results of waste disposed countywide in the main waste categories for the transfer station, commercial, and self -haul substreams. The composition by category for transfer station and commercial substreams are similar with organics, paper, and construction and demolition waste accounting for 70 -80% of the waste disposed. Construction and demolition waste is more pronounced in the commercial substream (24.0% vs. 14.4 %) and organics is more pronounced in the transfer station substream (37.6% vs. 31.5 %). In comparison, the self -haul substream is quite high in construction and demolition waste (45.6 %) and special waste (21.6 %). As shown in Attachment A (Exhibit A -6), most of the self -haul special waste consists of industrial sludge. Exhibits 2 -12, 2 -13, and 2 -14 show the ten largest waste components for the transfer station, commercial, and self -haul substreams. The top ten components make up 69 %, 76 %, and 87% of the transfer station, commercial, and self -haul substreams, respectively. Food, clean and treated lumber, and cardboard are each in the top 5 components in the transfer station and commercial substreams. The largest self -haul substream components include clean and treated lumber (20.5 %), industrial sludge (15.1 %), and green waste (11.4 %). It is important to note that many of the top ten components are good candidates for re -use or are potentially recyclable. For example, the estimates indicate that there is over 15,800 tons of cardboard disposed by the transfer station and commercial substreams: cardboard represents 5.9% of the transfer station substream, and 10.0% of the commercial substream. 2 -2 APPX B WASTE COMPOSITION REPORT 121709DOC