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ATTACHMENT D SAMPLING METHODOLOGY AND CALCULATIONS <br />EXHIBIT D -1 <br />Samples per Day by Substream <br />contribution to the total waste stream. Adjustments were made so that a sufficient number <br />of samples were taken from each substream to ensure a representative composition. Thus, <br />the commercial substream was slightly over sampled, and the transfer station substream <br />was slightly under sampled. <br />Vehicle Selection <br />Sampling intervals for each substream and vehicle type were determined by dividing the <br />day's expected number of arriving loads by the number of samples needed on that day. For <br />example, if 20 commercial packer trucks were expected to arrive at the West Hawai i <br />Landfill on a sampling day, and a total of 5 samples were needed, every 4th commercial <br />packer truck would be selected for sampling. Prior to each sampling day, the Field <br />Supervisor was given a sheet outlining specific sampling intervals per substream and <br />vehicle type. Attachment E contains an example of the vehicle selection sheet used in this <br />study. <br />Field Procedures <br />On each sampling day, the Field Supervisor identified sample loads as they arrived at the <br />West Hawaii Landfill. The Supervisor assigned each selected load a unique sample <br />identification number. Then, the Supervisor surveyed the driver of each vehicle to obtain <br />"header information" which was recorded on that sample's waste sort sheet. The following <br />information was collected for each sample load: <br />1. Load type <br />a. Commercially hauled loads only - the hauler name <br />b. Transfer station loads only - name of transfer station the load came from <br />D -2 APPX B WASTE COMPOSITION REPORT 121709.DOC <br />Transfer <br />Station <br />Commercial <br />Packer <br />Number of Samples <br />Commercial Commercial <br />Rolloff Other <br />Total <br />May 15, 2008 <br />6 <br />5 <br />6 <br />3 <br />20 <br />May 16, 2008 <br />6 <br />8 <br />5 <br />1 <br />20 <br />May 19, 2008 <br />6 <br />7 <br />6 <br />1 <br />20 <br />May 20, 2008 <br />6 <br />4 <br />9 <br />1 <br />20 <br />May 21, 2008 <br />6 <br />6 <br />4 <br />4 <br />20 <br />Total <br />30 <br />30 <br />30 <br />10 <br />100 <br />contribution to the total waste stream. Adjustments were made so that a sufficient number <br />of samples were taken from each substream to ensure a representative composition. Thus, <br />the commercial substream was slightly over sampled, and the transfer station substream <br />was slightly under sampled. <br />Vehicle Selection <br />Sampling intervals for each substream and vehicle type were determined by dividing the <br />day's expected number of arriving loads by the number of samples needed on that day. For <br />example, if 20 commercial packer trucks were expected to arrive at the West Hawai i <br />Landfill on a sampling day, and a total of 5 samples were needed, every 4th commercial <br />packer truck would be selected for sampling. Prior to each sampling day, the Field <br />Supervisor was given a sheet outlining specific sampling intervals per substream and <br />vehicle type. Attachment E contains an example of the vehicle selection sheet used in this <br />study. <br />Field Procedures <br />On each sampling day, the Field Supervisor identified sample loads as they arrived at the <br />West Hawaii Landfill. The Supervisor assigned each selected load a unique sample <br />identification number. Then, the Supervisor surveyed the driver of each vehicle to obtain <br />"header information" which was recorded on that sample's waste sort sheet. The following <br />information was collected for each sample load: <br />1. Load type <br />a. Commercially hauled loads only - the hauler name <br />b. Transfer station loads only - name of transfer station the load came from <br />D -2 APPX B WASTE COMPOSITION REPORT 121709.DOC <br />