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<br />April 28, 2005 <br />Page 2 <br /> <br />. Attachment C - Excerpts from the City of Shoreview Recycling Contract: <br />Processing Residuals Requirements <br /> <br />Background <br /> <br />Many communities are considering changing their recycling programs to single stream <br />systems. The City of Roseville conducted a pilot collection study in 2004 to test the <br />residents' response to a variety of collection design changes, including two pilot routes testing <br />single stream recycling. One of the key components in quantif'ying the overall impacts of <br />collection design choices is the need to estimate the change in "processing residuals from the <br />MRF" as one indicator of environmental impacts. <br /> <br />Changing a collection design impacts many system variables: <br /> <br />. Overall participation may increase or decrease due to increased convenience (e.g., <br />less sorting, wheeled carts); <br /> <br />. Individual household recovery rates may increase (more recyclable materials set out <br />and less trash) affecting the relative composition of the recycling stream; <br /> <br />. More "non-targeted materials" may be set out by residents for recycling; <br /> <br />. The collection crews may not inspect the recycling bins at truck-side for non- <br />targeted materials (if lidded carts are loaded with semi-automatic or automatic lifting <br />devices on board the curbside recycling vehicles); <br /> <br />. Once delivered to a MRF, the relative percent and absolute tons of "processing <br />residuals" output for disposal may increase; <br /> <br />. Once sorted and processed at the MRF, the individual recyclable commodities (e.g., <br />bales of newspaper, aluminum cans, etc.) may have more or less "contaminants" <br />depending on MRF design, management and operations; and/or <br /> <br />. There may be more or less glass breakage throughout the collection and processing <br />stages such that the relative output of color-sorted glass vs. color-mixed, broken <br />glass changes. <br /> <br />Beyond "processing residuals", other potential environmental and health impacts of collection <br />system changes include: <br /> <br />. Overall or "net" recovery of recyclable material (i.e., more or less tons actually <br />recycled); <br /> <br />. Efficiency of collections (e.g., change in curbside truck payloads, routing, etc.); <br /> <br />. Worker health and safety (e.g., manual vs. automatic lifting; centralized processing <br />requiring manual sorting, etc.); and <br /> <br />. Composition of recyclables, commodities products, and processing residuals. <br /> <br />01-00253-10101-01011070001 I 13500 P:\13500 Ramsey Co. 2003\RTA\Roseville\FA\DraftResidualsMemo042805.doc <br /> <br />DRAFT <br />