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

Home

SECTION 1 INTRODUCTION 2. Commercial - This is waste hauled by commercial hauling companies. Commercial haulers use a variety of vehicles to transport this waste to the West Hawai'i Landfill, including packer trucks (garbage trucks), roll -offs (primarily open boxes), and other vehicles (e.g. flatbeds, pickups, etc.). This waste is collected both from residences and businesses. Self -Haul - This is waste that residents, contractors, businesses, and public entities haul directly to the West Hawai'i Landfill. These loads are transported either in small vehicles (e.g. autos, pick -ups, etc.) or large vehicles (e.g. dump trucks, flatbeds, etc). As with waste in the commercial substream, self -haul waste comes from both residences and businesses. Waste from public agencies (such as the County of Hawaii Parks Department) is also included in this category. The waste stream was broken down further in the transfer station and commercial substreams as follows: During field sampling, samples taken from the transfer station substream were also recorded by station so that information about the waste composition at individual stations could be recorded. Note, however, the relatively few number of samples taken at any individual station make any resulting composition estimates highly uncertain: the results should be viewed accordingly. Samples from the commercial substream were divided among the three main vehicle types (packers, rolloffs, and other). Each of the three substreams contributed a portion of the approximately 128,500 total tons of waste disposed at the West Hawai'i Landfill from July 2007 -June 2008 (FY 2008). About 32 percent (or about 41,700 tons) of this waste was hauled from transfer stations. Commercial hauling companies disposed of nearly 63 percent (81,000 tons), and the remaining 5,900 tons (approximately 5 percent) were transported to the landfill by self - haulers. 1.2 Methodology This section presents a summary of the sampling and calculation procedures used in this study. The complete sampling methodology including descriptions of the main calculations can be found in Attachment C. The procedures summarized in this section were used during the recent sampling event at the West Hawaii Landfill. Sky Valley Associates conducted both the recent sampling event at the West Hawaii Landfill and the 2001 sampling event at the South Hilo Landfill; the same procedures were used during both events. 1.2.1 Sampling Procedures A sampling plan was developed to produce statistically valid composition data for the three substreams described above. A total of 100 samples were captured and sorted at the West Hawaii Landfill on May 15, 16, and 19 through 21, 20083. The allocation of these samples among the three substreams was determined according to each substrearri s contribution to 3 Because all sampling occurred during May of 2008, these results do not account for any seasonal variation. 1 -2 APPX B WASTE COMPOSITION REPORT 121709.DOC