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Appendix B <br />Table 12 <br />Comparison of Dual Stream Routes During Pilot <br />Weekly vs. Bi-weekly Collection <br /> Tuesday (Weekly) Router Friday (Bi-weekly) Routez <br /> (Control) Statistically <br /> 90% Confidence 90% Confidence Significant <br /> Interval Interval Difference <br />Material <br /> <br />Category Mean Lower Upper Mean Lower Upper <br />Paper 65.4% 62.5% 68.3% 59.5% 53.9% 65.1 <br />Metals 7.4% 5.8% 9.0% 6.7% 6.0% 7.5% <br />Glass 13.6% 8.3% 19.0% 22.2% 14.5% 29.8% <br />Plastic 9.9% 7.7% 12.0% 8.6% 6.3% 10.9% <br />Contaminants 3.7% 2.6% 4.9% 3.0% 2.5% 3.5% <br />Total3 100% n/a n/a 100% n/a n/a <br />~ Three samples were sorted from the Tuesday routes. <br />s Three samples were sorted from the Friday routes. <br />a The totals may not equal the sum of the material categories due to rounding. <br />As shown in Table 12, the upper and lower confidence intervals for each of the <br />material categories of the weekly dual stream collection routes were not significantly <br />different than the bi-weekly dual stream (control) routes. Thus, the composition of the <br />materials collected did not significantly change. <br />As for the quantities of materials collected, Table 13 below reflects the weights of the <br />quantities collected for each route. <br />Table 13 <br />Comparison of Dual Stream Bi-Weekly vs. Weekly Collection (Tuesday) <br />Total Quantities Collected by Route Before and During Pilot <br />July September October <br />(bi-weekly) (weekly) (weekly) <br />Total Quantities Collected <br />(Tons) 8,150 5,650. 4,925 <br />It appears that on a monthly basis, the weekly collection would result in greater <br />quantities collected than bi-weekly collection. However, because the data set is <br />limited, we cannot draw a definitive conclusion without additional pilot data. <br />I3-12 B 1605 <br />