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Using this contamination data, the gross weights per household were then adjusied by subtracting the <br />contaminants to create the comparison in Table 7 of net pounds per household collected per route in the <br />"Before" and "During" periods for each pilot area. <br />Table 7 shows the following results: <br />y"Durin�" versus "Before." The single-stream routes resulted in statistical�y significant increases in <br />total tonn,ages recovered, even when their relatively high portions of contamination were subtracted <br />out, as compared to the same areas collected as dual-stream routes in the "Before" period. <br />■"During" versus "Before." The Two Bins route resulted in a statistically significant increase in total <br />tonnage recovered, net of contamination, as compared to the same area collected in the "Before" <br />period. <br />■ Tonnages recovered (net of contamination) for the other dual-stream pilot areas were not statistically <br />significantly different "During" versus "Before." <br />TABLE 7 <br />COMPARISON OF NETI POUNDS PER iIH COLLECTED PER R�UTE BEFORE AND DURING TFIE PILOT <br />Itoutes eLBefore" Pilot • All Dual Stream Routes "During" Pilot <br />Net Average Contaminanisz Net Average Cantaminants2 <br />Mean Lower iJpper Mean Lower Upper Statistically <br />(Avg. Lbs Range Range (Avg. Lbs Range Range Significant� <br />Collected Colfected Difference <br />per FiH per per FiH per <br />Route) a Route) 4 <br />Mon. SS 2i.33 19.70 22.96 28.16 25.83 30.49 ✓ <br />Mor�. - SS Contrast 26.87 25.72 28.03 34.39 32.19 36.59 ✓ <br />7ues. - Weekly3 23.53 21.44 25.62 28.79 20.81 36.77 <br />Wed. - Addt'l Educ 21.73 � 5.84 27.63 25.30 22.62 27.99 <br />Thurs. - Larger Bins 20.03 17.82 22.23 26.87 23.29 30.46 ✓ <br />Fri. - Control 24.14 19.19 29.10 26.$6 20.6U 33.11 <br />� Average tofal pounds after conhaminants were subtracted. <br />� The range was ca�ulated by subtracting the diffarence in pounds collected with and without contaminants {shown in 7able 3} from Uie gross pounds coAected per household. <br />3"During' Pilot dafa represents weekly pounds multiplied by two in order to compare to routes collected every otherweek <br />4 Demred (rom Appendix H Table 3 net average pounds per household calculaiions. <br />Processing Residuals <br />The previous section addressed contaaxiination by residents at the curb, which was statisticaliy signif cantly <br />higher in single-stream than in dual-stream collection. Once recovered materials were collected they were <br />all taken to the Waste Management/Recycle America Alliaxace ('WM/RAA) MRF in Minneapolis for <br />processmg. <br />20 <br />