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Stephan, When I managed the recycling program in Greensboro, NC, I developed a QC program that provided us with fairly empirical data on contaminants and contamination rates. The program is a fully-automated, single-stream recycling program so contamination was initially a serious problem, countered only by a handful of solid waste inspectors that worked with me. We actually wrote up an SOP and developed definitions for specific contamination types in order to be consistent. E.g., gross contamination was defined as materials that were in no way, shape or form even close to being identified as those that should go in the recycling carts. Usually it was yard waste, household garbage or liquid wastes. Structural contamination was defined as materials that could easily be considered to be recyclable because of their physical makeup and/or the presence of the recycling symbol on it. Our goal was to reduce overall gross contamination first, sustain that then work on structural contamination. We even developed a grading system with both positive and negative consequences for repeat do-gooders and offenders, respectively. The woman who took my place could give you some additional info on that program as she was my assistant when we developed the program. Let me know if you want me to put you in touch with her. Wayne >>> Stephan Pollard <sp@no.address> 11/24/2004 10:53:21 AM >>> Can anyone lead me to examples of detailed studies (and reports) on contamination within public recycling and compostables collections? Also, wondering if there's a developed lexicon. Happy Holidays All Stephan -- Stephan Pollard Environmental Dynamics Doctoral Program University of Arkansas Rm 113 Ozark Hall Fayetteville, AR 72701 Tel: (479) 575-6603 http://www.cast.uark.edu/~sp |
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