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• • <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 /> c il <br /> r•= ( <br /> E wi <br /> where: <br /> • c = weight of particular component <br /> • w = sum of all component weights <br /> • for i = 1 to n, where n = number of selected samples <br /> • for j = 1 to m, where m = number of components <br /> Franchise Agreement for Collection Services with Recology San Mateo County Attachment E -1 <br /> Redwood City Page 6 of 14 <br />