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<br />March 23,2005 <br />Page 16 <br /> <br />Table 19 <br />Comparison of Dual Stream Routes <br />Before vs. During Pilot <br /> <br /> Tues-Friday Dual Stream Routes' Tues-Friday Dual Stream Routes 2 <br /> July (Before) September & October (During) Statistically <br /> 90% Confidence 90% Confidence Significant <br /> Interval Interval Difference <br />Material Mean Lower Upper Mean Lower Upper <br />Category <br />Paper 61.3% 52.7% 69.9% 61.5% 54.7% 68.2% <br />Metals 6.6% 4.3% 8.9% 7.1% 5.6% 8.6% <br />Glass 18.7% 13.1% 24.3% 18.4% 12.3% 24.4% <br />Plastic 9.9% 5.4% 14.4% 9.6% 6.7% 12.5% <br />Contaminants 3.5% 2.4% 4.6% 3.5% 2.6% 4.4% <br />Total' 100% nia nia 100% nla nia <br /> <br />1 Seven samples were sorted from the July dual stream routes. <br />2 Thirteen samples were sorted from the dual stream routes. <br />3The totals may not equal the sum of the material categories due to rounding. <br /> <br />The upper and lower confidence intervals of the dual stream routes during the pilot program <br />were not significantly different than the dual stream routes before the pilot was initiated. Thus, <br />the July composition results can be considered representative of dual stream collection for the <br />City ofRoseville. <br /> <br />Summary <br /> <br />The results of the comparative analysis of the pilot routes are summarized below. <br /> <br />Comparison of the Monday Collection Routes <br /> <br />The upper and lower confidence intervals from both the September and October Monday single <br />stream pilot routes reflect a statistically significant difference when compared to those of the <br />July (pre-pilot) dual stream route. Thus, the materials composition is projected to change when <br />comparing single stream to dual stream collection. <br /> <br />When comparing the material compositions by weight for the Monday collection routes, the <br />results include: <br /> <br />. The quantities of paper collected via the single stream method (September and October) <br />increased compared to the quantities collected via the dual stream method (July); <br /> <br />. The quantities of metals, glass, and plastic decreased with the single stream collection <br />method; and <br /> <br />01-00253-10101-01011070001 I 13500 P:\13500 Ramsey Co. 2003\RTA\Roseville\F A\B1544 - Final Data Analysis <br />