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Apri128, 2005 <br />Page 9 <br />Recommendations for Additionai Study <br />This analysis was necessarily limited in scope. The fo]]owing recommendations for <br />additional study are derived from the rnany research questions raised by this analysis but not <br />yet adequately addressed: <br />1. Processing residuals from dual stream systems - The WM/RAA test at their <br />Minneapolis MRF zeported only on results from their singIe stream systems. No <br />coxtiparable data has yet been made available on dual stream sys#ems. The <br />metropolitan area counties and State of Muuiesota could consider the need for a set <br />of independent, parallel tests resulting in statistically reliable data that compares <br />single stream processing residuals to dual stream processing residuals. <br />2. Review of cantracting provisions and i�nnplementation practices - This memo <br />sumina.rizcd recycling contract language used by the Cify of Shoreview in 2001. <br />Follow-up interviews with the City staff and their contractor, WM/RAA, is needed <br />to determine how tl�e provisions were actuatly implemented, the effectiveness of <br />these pravisions, and recommendations for fizture contract lar�guage. Also, a <br />survey of othez metro area communities may reveal additional examples of other <br />cities establishing "processing residuals maxirnums" in their recycling contracts. <br />Finally, this reseaxch activi#y could help vvith the efforts to standardize definitions <br />and moni�oriaag procedures. <br />3. Review of MRF operator procedures to minimi�.,e pracessing residuais - This <br />analysis has on]y touched the surface of a rriuch deeper set af operator policies and <br />pzactices to minimize proc�ssing residuals and max�imize clean, marketable <br />recycZable products. A direct survey of MRF operators, bolh public and private, <br />could help further itemize these policies and operations. The end result of this <br />additional research could be to establish gcneric industry "best practices" <br />recommendations. <br />4. Review of current end-use applications for mi�ed�color, broken glass - There <br />are many MRFs sending a variety of materials to la.ndfilis. Some of these <br />materials are de�ned as `�uaste foz disposal" and some are def�ix�ed as "aggregate <br />substitutes for alternative daily landfill cover". There is a need to survey such <br />current policies and practices by county, state, and private companies. This <br />relatively simp�e research activity would help greatly to establish tha current <br />"baseline" for discussion about the effectiveness of the current systeFns in <br />m;nirr�ing MRF proccss residuals. <br />U1-00253-10101-0161 � 070001 � l3500 P:U3500 Ramsey Co_ 2003�RTA1RosevillelFAlDraftResidualsMemo042805_doc DRAFT <br />