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Data Analysis of City of Roseville Recyclable Materials <br />Table 6 <br />Comparison of Material Compositions by Weight' <br />Monday Routes <br />Weight (Pounds) <br />July September <br />Material Category (Dual Stream) (Single Stream) <br />Paper <br />3,879 <br />9,165 <br />Metals <br />529 <br />326 <br />Glass <br />1,320 <br />617 <br />Plastic <br />717 <br />699 <br />Contaminants <br />261 <br />827 <br />October <br />(Single Stream) <br />9,327 <br />291 <br />690 <br />594 <br />1.199 <br />Totalz 1 6,707 1 11,633 1 12,101 <br />'The weights were estimated by applying the median percentages from the sorting events to the average of the pilot route truck tonnages. <br />%The totals are based on the average of two pilot routes for each month. <br />The results of comparing the material compositions by weight for the Monday <br />collection routes include: <br />■ The quantities of paper collected via the single stream method (September and <br />October) increased compared to the quantities collected via the dual stream <br />method (July). <br />■ The quantities of metals, glass, and plastic decreased with the single stream <br />collection method. <br />■ The amount of contaminants collected via the single stream method was higher <br />than the dual stream method. <br />No conclusions are drawn as to the magnitude of the differences by weight because <br />the weights represent only the median percentages. <br />Comparison of Single Stream and Dual Stream <br />Collection Methods <br />The results of the Monday single stream pilot routes were compared to the combined <br />results of the Tuesday through Friday dual stream collection routes in September <br />(Table 7) and October (Table 8) to compare the overall single stream results to the <br />dual stream results. <br />B1605 B-7 <br />