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Review of Trash Collection Impacts presented in Table 1 above. As an example, if we assume an average of 6 rather than 8 total trash and recycling trips per week for the current open competition system, the associated "Percent of Total Vehicle Impacts" is 10.8% rather than the 14.0% for the base case shown in Table 2. The associated reduction in the "Percent of Total Vehicle Impacts" in this case is 3.4% (10.8% - 7.4°1°) rather than 6.7%. The corresponding reduction in the "Allocated Portion of Total Annual Cost to Maintain Residential Streets at Current Condition" would be approximately $86,000 {$272,000 - $186,000) rather than the. $168,000 for the base case ($354,000 - $186,000} shown in Table 2. Table 2 COMPARISON OP OPEN COMPETITION ANIIbISTRICTEO COLLECTION TRASH & RECYCLING 1/EHICI.E IMPACTS -Iota} Trash 8~ Ailocated.Partion o Recycling Total Annual Cost . Annual C02 Emissions to Maintain Collection System Vehicle Passes I Percent of Total Residential Streets Week 1 Vehicle l.mpacts Residential ' at Current . Condition Pcunds Tans 'Street {$20138) Open Competition S.0 14.0% $ 354,000 542,000 271 Districted Collection 4.0 7.4% $ 18fi,000 271,000 138 Reduction (Districted vs. a~n,~~'~ 4.0 6.7% ' $< 468,000 271,000 136 {'~ The Districted Collection "Percent of Tofal Vehicle impacts" and "Annual Cost to Maintain Residential Streets at Current Condition" is greater than half the calculated impacts for the Open Competition System due to the methodology used, which assumes a constant number of vehicle trips for each scenario. While the estimated impacts are subject to changes in the various underlying assumptions, we believe that the analysis provides a reasonable projection of the magnitude of trash truck impacts on the City's residential streets, which is supported by various independent third-party estimates. Appendix C {Comparative Trash Truck Load Factors} provides a comparison of the estimated passenger car equivalents estimated for the residential trash and recycling trucks operating in the City to independent references in support of the reasonableness of the estimates used in our analysis. Change in Street Design Standards fZ3 The City adopted new design standards for streets in 1999 that are expected to increase the available vehicle loads streets can handle over their lifetime. These new standards do not affect the calculated percentage impacts of trash and recycling trucks on residential streets, since that calculation is not based on street design standards. Those standards would, however, be expected to reduce annual maintenance costs over time. As a result, the Section 2 - 6