2005 Recycling Pilot Program Report

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March 23, 2005 Page 14 Tab[e 15 Comparison of Dual Stream Bi-Weekiy with Additionaf Education (Wed) vs. Bi-Weekly Control (Friday) Total Quaniities Collected by Route During Pilot Wsdnesday Friday (Addi'I Educ) (Control) September 9,625 10,825 October 7,975 8,075 Mean 6,800 9,450 Standard Deviation 1,1fi7 1,945 Comparison of the Current Dual Stream Bi-Weekly Method to the Dua! Stream Bi-1Neekly Method with Larger BEns The residents in the Thursday pilot area received larger curbside recycliaag bans {22-gallon capacity compared to the original 18-gallon capacity bins). Tb.e new hins were also equipped witk� wheels. The callect�on method {dual stream) and frequency (bi-weekly) renn,ained unchanged. The results are reflected below in Table 16. Table �46 Comparison of Dual S#ream Routes During Pilot Bi-Weekly with Larger Bins vs. Bi-Weekiy Coniroi Thursciay {Larger Bins) Friday (Bi-weekly} Route2 Route� (Cantrol) 90% Confidence 90% Confidence Interva[ Interval Material I Mean Lower Upper I Mear� Lower Upper Category Statistically Significant D�fference Paper 63.7% 53.8% 73.7% 59.5% 53.9% 65.1% Met215 5.8°l0 5.0% 6.6% 6.7% 5.U% 7.5% Glass 19.1% 12.fi% 25.7% 22.2% 14.5% 29.8% Plastic 8.1% Q.8°lo 11.3% 8.fi% 6.3% 10.9% Contaminants 3.3% 2.0% 4.5% 3.0% Z.5% 3.5% Total3 1U0% nla nla 100% nla nla � Four samples were sorted from the Thursday route. z Three samples were sorted trom the Friday route. ' The totals may not equal Ihe sum of the malerial categaies due to rounding. As sbown in Table 16, the upper and lower confidence intervals of the bi-weekly, dual stream with larger bins were not signifcantly different than the bi-weekly dual stream {control} routes. Ol-U0253-10I61-0101 � 070001 � 13500 P:\13500 Ramsey Co. 2003�RTA1RosevillelFA1B1544 - Final Data Analysis