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To ensure the vehicle selection and tally forms are not lost before inputting the data into <br /> an electronic form, the sampling crew manager will make copies of all completed forms <br /> and will keep the copies in a separate place from the originals. The sampling crew <br /> manager will ensure a copy of the form is delivered within one (1) day to the person <br /> inputting the data into an electronic form. <br /> 5. Sorting categories <br /> All loads identified for sorting shall be sorted and weighed into the following two (2) <br /> categories: <br /> 1) Contamination <br /> 2) Targeted Recyclable Materials, Source - Separated Targeted Recyclable <br /> Materials, Organic Materials, or Plant Materials <br /> 6. Calculations <br /> Estimates of Contamination and Targeted Recyclable Materials, Source - Separated <br /> Targeted Recyclable Materials, Organic Materials, or Plant Materials will be calculated <br /> using a method that gives equal weighting or "importance" to each sample within a given <br /> stream. Confidence intervals (error ranges) will be calculated based on assumptions of <br /> normality in the composition estimates. <br /> In the descriptions of calculation methods, the following variables will be used: <br /> • i denotes an individual sample. <br /> • j denotes the material type. <br /> • c; is the weight of the material type j in a sample. <br /> • w is the weight of an entire sample. <br /> • r is the composition estimate for material j (r stands for ratio). <br /> • a denotes a region of the state (a stands for area). <br /> • s denotes a particular sector or subsector of the waste stream. <br /> • n denotes the number of samples in the particular group that is being analyzed at <br /> that step. <br /> Estimating the Composition <br /> The following method will be used to estimate the composition of waste belonging to the <br /> Commercial Source - Separated and Targeted Recyclable Materials, Commercial Organic <br /> Materials, Commercial Plant Materials, Single - Family Targeted Recyclable Materials, <br /> and Single - Family Organic Materials streams. <br /> For a given stream, the composition estimate denoted by r represents the ratio of the <br /> component's weight to the total weight of all the samples in the stream. This estimate will <br /> be derived by summing each component's weight across all of the selected samples <br /> belonging to a given stream and dividing by the sum of the total weight of waste for all of <br /> the samples in that stream, as shown in the following equation: <br /> Franchise Agreement for Collection Services with Recology San Mateo County Attachment E -2 <br /> Redwood City Page 8 of 19 <br />