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March 23, 2005 <br />Page 16 <br />Table 99 <br />Comparison of Dual Stream Routes <br />Before vs. During Pilot <br />Tues-Friday Dual Stream Routes' Tues-Friday Dual Stream Routes � <br />July (Befare} 5eptember & �ctober (puring) <br />90% Canfidence 9Q% Confidence <br />Interval lnterval <br />Material I ��an Lower Upper f Mean <br />Category � <br />Paper 61.3% 52.7% 69.9% <br />Metals 6.6% 4.3% 8.9% <br />Glass 18.7% 13.1% 24.3% <br />Plastic 9.9% 5.4% 14.4% <br />Contami�ants 3.5% 2.4% 4_6% <br />Total3 100% n/a n!a <br />' Seven samples were sorted trom the July dual s[ream routes. <br />�Thirteen sampies were sated from ihe duai sUeam routes. <br />3The totals may not equal the sum of the material caFegocies due to rounding. <br />61.5% <br />7.1 % <br />18.4% <br />9.6% <br />3.5% <br />I VQ�IO <br />Lower <br />54.7% <br />5.6% <br />� Z.3% <br />6.7% <br />2.6% <br />n!a <br />Upper <br />fi8.2% <br />6.6°/a <br />24.4% <br />12.5% <br />4.4% <br />nla <br />Sfatistically <br />Significant <br />Difference <br />T�ae upper and lovcrer confidence intervais of the dual stream routes during the pilot prograrxi <br />were not significantly different than the dual stream routes before the pilot was itaitiated. Thus, <br />the July composition results can be considered representative of dual slxeam collection for the <br />City of Roseville. <br />Summary <br />The results of the comparative analysis of the pilot routes are s�urun.arized below. <br />Comparison of the Monday Collection Routes <br />The upper and Iower confidence intervals from both the September and October Manday single <br />stream pilot routes reflect a statistically significant difference when compared to those of fihe <br />3uly (pre-pilot) dual stream route. Thus, the materials composition is projected to change when <br />coxnparing single stream to dnal stream collection. <br />When comparing the material coxnpositions by weight for the Monday collection routes, the <br />results include: <br />■ The quantities of paper collected via the single stream zxzethod {September and October) <br />increased compared to the quaz�tities collected via ihe dual stream method (July); <br />s The quantities of �netals, glass, and plasiic decreased with the single stream collection <br />method; an.d <br />01-00253-10101-0101 � 070001 j 13500 P:113500 Ramsey Co. 20031IZTA\Roscvillc1FA181544 - Final bata Analysis <br />