An initial analytical cut through BAN's claim tells us the following:

That BAN attributes the statistic of 50-80 percent to 'informed industry insiders' and 'very knowledgeable and informed industry sources', yet does not state who the sources are except in one instance (a phone interview with Mike Magliaro). Notice a very important shift that occurs within BAN's report then: a single attributed source is pluralized. The one becomes the several. This is a move that suggests there are many experts that make the same estimate about e-waste exports. The photograph of asset tags that appears on p. 14 contains three such tags: one from the City of Los Angeles, one from the State of California, and one from the L.A. Unified School District. Together with the caption, the report implies that these tags are a mere selection out of an undisclosed number of such tags collected and photographed by BAN. So the photograph and the caption, work in combination to expand or pluralize the evidence said to support the 50-80 percent estimate. Thus, as in the previous point, three instances are made more plural. At the same time the report gives no information about how the asset tags were collected that would let a reader know whether those that are pictured on p. 14 come from some sort of systematic sample or not. 

Meta-Actor: Other

Source Document: http://scalar.usc.edu/works/reassembling-rubbish/mapping-e-waste-as-a-controversy-from-statements-to-debates