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Appendix A systems. The metropolitan area counties and State of Minnesota could consider the need for a set of independent, parallel tests resulting in statistically reliable data that compares single- stream processing residuals to dual- stream processing residuals. 2. Review of contracting provisions and implementation practices - This analysis summarized recycling contract language used by the City of Shoreview in 2001. A survey of other metro area communities may reveal additional examples of other cities establishing "processing residuals maximums" in their recycling contracts. Finally, this research activity could help with the efforts to standardize definitions and monitoring procedures. 3. Review of MRF operator procedures to minimize processing residuals - This analysis has only touched the surface of a much deeper set of operator policies and practices to minimize processing residuals and maximize clean, marketable recyclable products. A direct survey of MRF operators, both public and private, could help further itemize these policies and operations. The end result of this additional research could be to establish generic industry "best practices" recommendations. 4. Review of current end -use applications for mixed - color, broken glass - There are many MRFs sending a variety of materials to landfills. Some of these materials are defined as "waste for disposal' and some are defined as "aggregate substitutes for alternative daily landfill cover ". There is a need to survey such current policies and practices by county, state, and private companies. This relatively simple research activity would help greatly to establish the current "baseline" for discussion about the effectiveness of the current systems in minimizing MRF process residuals. A-O B1605