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Program Deinils nnd Selection Rntionnle Program Adminirtratton Recommendation: San Marco County Department of Public Works. Waste Managcment Division Bin Seleclion Bin Recommendation: The Biostack Composter'manufactured by Smith & Hawken ":." The Biostack Composter consists of three bottomless tiers stacked on top of each other and a hinged lid.' The basic bin size O'tiers) is 13 cubic feet. Additional' tiers Can be added; each additional .tier adds 4.2 cubic feet. It's made of 60% recycled polyethylene. Selection Rationale Numerous pilot studies have been completed by other jurisdictions involving both experienced and novice compostcrs to evaluate various compost bins. The San Marco County Compost Bin Task Force reviewed man~y of these pilot studie~ and determined that enough information already existed in the completed studies to select an appropriate bin for San Mateo County residents without conducting an additional pilot study. To select a bin using existing studies the task force first prepared a list of evaluation criteria · and a-~igned points to the criteria to indicate each criteria's relative importance. The evaluation studies were then reviewed ,'md three bins were identified as candidates. " Jurisdictions using one or more of the bins were contacted for feedback. We also contacted ' each of the manufacturers. After considering all of the available information, the Biostack Composter was selected as the best bin for San Mateo County residents. A summary of how the binZrated on the criteria identified as most important (listed below in descending order) ." follows. : Effectiveness: How effective is the bin at producing finished compost? The Biostack Composter's patchier three tier design is suitable to many types of users. The user interested in producing compost quickly will be able to do so easil.~;. Frequent turning of the pile mixes and aerates the materials resulting in rapid decomposition and quick results. The three tier design makes turning the pile easy. The stackable tiers are simply tmstacked and restacked and th.e initial pile is scooped into the new stack: Alternatively, for the user : interested in a-low maintenance process, the three tiers can be used effectively for' Iow input. -. slow composting by leaving the initial stack intact and letting the materials compost inside un,'u;sisted. · While the low maintenance process works, we believe it is best to promote an active process. The active compoaler will be rewarded by the quick production of finished compost which ' .' Exhibit "A.' - Page 2 of 8 : :