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Orange County <br />Waste Composition Study <br />Section 2: Methodology <br />4 <br />Orange County/Report/Final Report <br />2.4 Sampling and Sorting Procedures <br />Sample selection was organized by generator sector to ensure a sufficient number of samples <br />would be sorted for each generator sector and jurisdiction to achieve statistically valid results. KCI <br />reviewed waste tonnage data and set target sample numbers for each generator sector and <br />jurisdiction. KCI coordinated with the major public and private haulers who collect residential <br />and/or commercial waste in the County in order to identify specific loads of waste for sampling. All <br />haulers were asked to select routes that encompassed a cross-section of their service areas and to <br />identify routes containing waste generated within the County. County and KCI staff then worked <br />together to coordinate the direct hauling of selected loads of waste to the City of Durham’s facility <br />for inclusion in the WCS. <br />Route-specific placards were sent to each hauler detailing the selected routes and collection days <br />requested for delivery during the sort week. The placards were distributed by each hauler on <br />specific days of the event, which helped scale house and KCI staff identify selected routes as they <br />entered the transfer station. <br />Table 2-1 provides the number of samples pulled and sorted for each generator sector and <br />jurisdiction during the fall and spring sorting events, respectively. During the two sorting events, <br />representative samples were taken from 101 loads of solid waste (51 in the fall sorting event and <br />50 in the spring sorting event). <br />Table 2-1: Sampling Schedule for Fall (October 2016) and Spring (April 2017) Sorting Events <br /> <br />Single-Family <br />Residential Multi-Family Residential Commercial <br />Hauler/Generator <br />% of <br />Tons <br /># of Samples <br />% of <br />Tons # of Samples <br />% of <br />Tons # of Samples <br />Fall Spring Fall Spring Fall Spring <br />Chapel Hill1 32.3% 6 5 63.3% 5 5 15.3% 5 4 <br />Carrboro2 12.1% 2 2 33.5% 1 0 7.8% 2 2 <br />Hillsborough 6.3% 2 2 3.2% 0 0 7.3% 2 2 <br />UNC n/a n/a n/a n/a n/a n/a 27.5% 5 5 <br />Unincorporated County <br />(County Hauled)3 26.8% 6 4 n/a n/a n/a 4.5% 2 2 <br />Private Haulers4 26.4% 5 5 n/a 1 3 37.6% 7 9 <br />Totals 100% 21 18 100% 7 8 100% 23 24 <br />1 – Two (2) multi-family residential samples from Chapel Hill in each sort were collected by private haulers. <br />2 – During the Fall sorting event, additional samples of Carrboro single-family residential waste were sorted as <br />part of the Town’s Residential Solid Waste study. These samples were aggregated into the two samples <br />included in this report. <br />3 – County hauled waste is from convenience centers (residential) and County schools and County offices <br />(commercial). <br />4 – Private haulers for single and multi-family are from unincorporated County. Commercial private haulers <br />are from the whole County. <br />To obtain a representative sample from a selected load of MSW, the vehicle driver was directed to <br />the designated area to tip. The load was visually divided into six sections and, based on a die roll, <br />one of the six sections was selected. A representative sample of at least 200 pounds was pulled, <br />placed on a tarp at the sorting area, labeled, and stored until sorted. <br />DocuSign Envelope ID: 00C54720-9DC0-4A3D-ABED-77E0FD28E0CD