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Pilo� Study Design and Methodologv <br />Goals <br />The goal of this study is to help Roseville design a curbside recycling program that will successfully capture <br />tz�ore recyclable material. The purpose of the pilot program was to field test different strategies to increase <br />the effectiveness of the City's recycling program by maximizing participation, increasing tonnage collected <br />and increasing tonnage successfuily processed for sale to manufacturers. It will also assess the cost to <br />hameowners and resident saiisfaction for the different strategies. <br />Key Concepts for Pilot Study <br />Several key concepts emerged for study in this groject: <br />• Trend for Increasing Comxningiing <br />• Education <br />• Bin/cart capacity; and <br />• Materials recovered and contamination <br />Trend for Increasing Commingling <br />Beginning in the 1980s and early i 990s in much of Minnesota and the metropolitan area, residential curbside <br />collection programs rec�uired residents to separate recyclables into several cat:egories. Following a trend that <br />had already begun elsewhere in North America, by ihe Iater 1990s some vtTaste haulers and recycling <br />collectors in Mintxesota were shifting to the commingled duai-stream system (also known as dual�sort or <br />two-sort). Yn this system, residents place all grades of paper and fiber in one bin and alI metal cans, piastic <br />bottles, and glass bottles (coilectively called mixed rigid containers or mixed rigids) in a�tother bin. This is <br />the City's current system. <br />More recentiy, Waste Management, Inc., the City's contracted recycling vendor since 1999, has led a <br />rnovement in Minnesota and elsewhere in North Arnerica towards single-stream (also known as single-sort <br />or one-sort) collection, whereby mixed fibers and mixed rigid containers can all be combined in one <br />container, usually a large, wheeled cart. A few other haulers in the metropolitan area are beginning to or <br />expECt to offer single-stream service as well. <br />A key reason touted for the shift to dual�stream ar single-stream commingling is to rz�ake recycling more <br />convenient for residents, thereby fostering additional participation and recovery of materials, and potentially <br />lowering costs. The tradeoff in this sysiem is that more processing is required at maierials recovery facilities <br />{MRFs) to separate mixed recyclable materials and make them acceptable to ei�d-use markets. Some <br />indushy professionals have cited concerns that comrningled systems result in increased containinants that <br />have to be disposed as refuse, as well as an increase in the amount of broken glass generated as a result of <br />cammingling. <br />Education <br />Data collected by the City of Roseville and results o�the R.AM and Eureka Recycling studies indicate <br />additional resident education could increase the arnount of material put out for collection. Ten percent of <br />calls to Roseville's Recycling Coardinator from 20Q1 to 2004 were from current residents with questions <br />about what was accepted in the two-sort, curbside program (new residents are not included in this figure). <br />This includes people who want to icnow if it's okay to miar your bottles with your cans. <br />G <br />