10-2. Determine the round-trip break-even time for solid waste collection systems in which the 30 -yd 3 self-loading compactors used for collection are driven to the disposal site and compare that with using a transfer and transport system. Assume that the following data are applicable. (a) Specific weight of wastes in self-loading compactor =600lb/yd3 (b) Specific weight of wastes in transport trailers =325lb/yd3 (c) Volume of tractor-semitrailer transport unit =105yd3 (d) Operational cost for self-loading compactor =$40/h (e) Operational cost for tractor-semitrailer transport unit =$60/h (f) Transfer station operational costs including amortization =$3.25/ ton (g) Extra unloading time cost for transport units, compared with compactors = $0.40/ ton