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Attachment B <br />about four percent residue of total input. (Approximations do not add to 100 percent <br />due to Project Team rounding.} Colar-mixed, broken glass was defined as a product <br />by the WNI/RAA study and represented 11 percent of the total input. Color-sorted <br />glass, in contrast, represented two percent of total input. <br />The WNTIRAA study slated that: <br />"The Twin Cities MRF has set a production standard of 1.5 percent (average) or <br />less for tatal ouit�rows ax►d prohibitives for its newspaper grade with an action <br />]irn,it of 2 percent. Any deviation above 2 percent i.n the regular sampling of bales <br />subjects the production staff to a number of remedial procedures entailing review <br />of all operational functions. It aiso requires additianal sampling until a <br />production standard of less than 1.5 percent is met." <br />Critical Review - The report provided to the Project Team was titled a"Summary" <br />and no raw data, analytical methods or statistics were provided. Thcrefore, this memo <br />is limited to xeview of the results as contained in the suxnmary of test results. <br />Therc was no comparablc sortir�g/analyses reported on recyciablcs from dual stream <br />collection systems. Therefore, it is impossible for the Project Team to determine the <br />net increase in process residue of single stream processing vs. dual s#ream processing. <br />Frozn the collection naethodology descniption (i.e., semi-automated or automated <br />cuxbside vehicles), it is unlikely there was any truck-side quality inspection by the <br />drivez (i_e., no truck-side rejects by the drive of non targeted material). This is normat <br />procedure for such lidded cart recycling collectian systems, az�d therefore one may <br />assu�me the collections were using normal operations. <br />2 DRA'F'i' 7rzaos <br />