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<br /> Comprehensive Review of <br /> S olid W aste Collection and Disposal Options <br /> <br />v2.1 87 10/22/12 <br />by subtracting the current total average route time incurred with transport to the Orange County <br />Landfill (including off-route time) from the current task compensation structure. For example: <br />Total Route Time = [(# of Routes) (Average Route Time)] + (Round Trip Travel Time) <br />+ (Load Tipping Time) <br /> <br />Where: Average Route Time = 6 hours <br /> Round Trip Travel Time to Orange County = 12 miles at 35 mph <br /> Assumed Tipping Time = 0.33 hours <br /> <br /> Task Compensated Time = (# of Routes) (1 Trip per Route per day) (10 hours per day) <br /> Additional Available Off-Route Time = (Task Compensated Time) – (Total Route Time) <br />Based on these analyses and the limited resource allocation scenarios evaluated SCS is <br />projecting that each residential collection crew may absorb between 1.53 and 3.81 hours per day <br />in off-route crew transport time. We assumed approximately 1.2 hours of additional off-route <br />time to drive to and from and unload at a transfer station in Durham. <br />Commercial collections manpower allocation can absorb an additional and estimated 4.34 hours <br />per crew of off-route transport time per day before additional labor costs are incurred by the <br />Town. In summary, sufficient flex time currently exists to account for the additional transport <br />and queuing time required for each route. <br />Understandably, changes to collections routing and resource allocation would potentially impact <br />the existing task-based collections structure. However, this routing and resource allocation <br />evaluation is necessary to meet the projected MSW transportation and disposal requirements <br />within current budgetary constraints modeled with this short-term, direct haul option, while <br />maintaining the current level of service to Town customers. <br />6.3.4 Other Scenario -Consistent Assumpti ons <br />The results of the scenario modeling for each transfer station disposal scenario factor in the <br />forfeiture of current transportation and disposal costs associated with using the Orange County <br />Landfill. As previously stated, the disposal tip fee at the Landfill is $57 per ton and the mileage <br />to the landfill was calculated to be 6 miles one-way. For each scenario the difference in tipping <br />fee and off-route travel time to the Orange County Landfill was included. In addition, <br />throughout the lifecycle cost, a 3% cost of inflation from the baseline year of 2012 was assumed. <br />Irrespective of the variable site-specific mileage and tip fee data for each transfer station location <br />input into the model, the following assumptions remained constant for each transfer station <br />modeling scenario: <br /> Additional Collection Vehicles <br /> <br />- Baseline 2013 capital expenditure for previously purchased vehicles was provided <br />as $311,000 <br />- 7-year depreciation schedule (i.e., projected to be replaced every 7 years)