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Table 4-20 shows the same system with a loading time 15 seconds longer that has 0.53 ounces of fuel added per stop. This additional time increases the corresponding fuel consumption factor to 242% more fuel used than a similar organized system. It is apparent in the data that in either scenario, the open system is projected to use more than double the fuel of the organized system. Duluth A similar approach was used to analyze the recycling collection system in the city of Duluth The difference being that for the haulers in Duluth, WLSSD provided data on the haulers' collection methods (single stream versus dual stream) and the collection frequency (weekly or every other week). Table 4-21 provides the analysis for the existing system in Duluth which includes some dual stream/collection on a weekly basis and some single stream/collection on an every other week basis. Table 4-21 models the dual stream collected weekly with a 30 second stop and single stream automated collected every other week with a 15 seconds loading time. In Table 4-21 the organized system was modeled as every other week automated with a 15 second loading time. Table 4-22 is the same as Table 4-21 except that the organized system is modeled as dual stream weekly with a 30 second loading time. The fuel consumption factor in Table 4-21 is 2.91 or 291 % more fuel than an organized system. The fuel consumption factor in Table 4-22 is 1.14% or 114% more fuel than this type of organized system. R - Analysis of Waste Collection Service Arrangements.doc Foth Infrastructure & Environment, LLC • 131 June 2009