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<br />Attachment B <br /> <br />about four percent residue of total input. (Approximations do not add to 100 percent <br />due to Project Team rounding.) Color-mixed, broken glass was defined as a product <br />by the WM/RAA study and represented II percent of the total input. Color-sorted <br />glass, in contrast, represented two percent of total input. <br /> <br />The WMIRAA study stated that: <br /> <br />"The Twin Cities MRF has set a production standard of 1.5 percent (average) or <br />less for total outthrows and prohibitives for its newspaper grade with an action <br />limit of 2 percent. Any deviation above 2 percent in the regular sampling of bales <br />subjects the production staff to a number of remedial procedures entailing review <br />of all operational functions. It also requires additional sampling until a <br />production standard ofless than 1.5 percent is met." <br /> <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. Therefore, this memo <br />is limited to review of the results as contained in the summary oftest results. <br /> <br />There was no comparable sorting/analyses reported on recyclables 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 stream processing. <br /> <br />From the collection methodology description (i.e., semi-automated or automated <br />curbside vehicles), it is unlikely there was any truck-side quality inspection by the <br />driver (i.e., no truck-side rejects by the drive of non targeted material). This is normal <br />procedure for such lidded cart recycling collection systems, and therefore one may <br />assume the collections were using normal operations. <br /> <br />2 <br /> <br />DRAFT <br /> <br />7/20/05 <br />