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Ap�il 28, 2005 <br />Page 3 <br />Because independent, acEual field measurements were not conducted as a part of the Roseville <br />pilot project, this memo will not exnpirically quantify the "process residuals" but rather <br />discuss the available data as reported in other studies. Also, the policy implications will be <br />out�ined and recommendations for further researc� itemized. <br />Standarc� Definitions - Ctixn-ently the recycling industry lacks sta.ndaxdized defmitions. This <br />is one of the key barriers to professional dialogue about designing stuclies to measure impacts <br />of changes to single stream recycling programs. The following set of terms is proposed to the <br />City and Ramsey County as a basis for such discussion {see Attachment A far a more <br />thorough set of proposed defmitions and examples.} <br />"Non-Tar eted Materials" - Materials that are defined by the municipality as not <br />acceptable but are routinely incIuded by residents in their curbside bins. <br />"Processin� Residuals" - Materials that are disposed as mixed solid wastc as an <br />unwanted by-product after processing of recyclab�es at MRFs. <br />"Contaminants in marketed product" - Qutihrows and prohibitives as defined for <br />specific commodities and grades by each end market (i.e., mills or other <br />manufacturing plants that utilize processed recyclable materials). <br />If these terms are clearly defined and reported, the recycling industry will be able to better <br />compare research results. The actual composition, sources, and systematic causes of <br />increased processing residuals will be better understood. Also, through inrzproved <br />communications and professional research, public and private management controls will <br />become more feasibie and accepted as "best practices". Thus, standardized defiuitions shonld <br />be a first step if reducing the amount of processing residuals is a top prionity for both <br />municipalities and private contractors regardless if the collection system is dual streazxi or <br />single stream. <br />Arraifable Dafia from the City of Rosevi��e Pilof Projec� <br />A comprehensive recyclable materials camposition analysis was c�nducted as part of the <br />overall City pilot project. One of the key indicatoxs of effectiveness nneasured for each <br />collection method was the amount of non-targeted material (or "contazxainants") collected_ <br />The non-targeted material was divided into four subcategories: <br />� Beer, Pop & Water Boxes <br />■ Other Paper Trash <br />� PIastic Bags and Other Filtn Plastic <br />t Other Trash <br />Ol-OD253-IOlDI-0101 + 070DOi � 13500 P:11350(l Ramscy Co. 20031ECTA1Rosevi11e1FA1DraftResidualsMemo042805.doc DRAF7' <br />