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5 th Edition, Chapter 12.19, Electric Arc Welding. AP -42 is available at the Lane <br />Regional Air Pollution Authority, the University of Oregon Library, the Eugene Fire <br />Marshal's Office, and on the internet at http: / /www.epa.gov /ttn/chief /ap42 /index.html. <br />Identify the welding process used (shielded metal arc welding is the most common), and <br />the electrode type from the SDS, then refer to Table 12.19 -1 to find total fume emission <br />factor. The table breaks these down further into Hazardous Air Pollutants (HAPs). <br />9. QUESTION: What is the proper output type under which to report welding material that <br />becomes a part of manufacturing equipment? <br />ANSWER: Only the fumes are reportable, as output type 5, quantity emitted to the air. <br />Metals used in welding are not reportable as they are not chemically altered in <br />processing. <br />10. QUESTION: We cut copper wire into segments which are then wound around a motor <br />part. The ends are not stacked and our engineer has determined that no copper is released. <br />Is the wire still an article? <br />ANSWER: Cutting the wire into segments and winding it around a motor part do not <br />negate the exemption since the diameter and thickness of the wire is not changed. The <br />copper wire remains an article as long as no toxic chemicals are released during use. <br />Since your engineer has determined that no copper is released, the article exemption does <br />apply and the copper wire does not have to be reported. <br />11. QUESTION: Copper wire at a facility is cleansed by dipping it into a sulfuric acid <br />solution. The acidic solution etches away a portion of the surface of the wire. The etched <br />copper reacts with the acid to form copper sulfate. The waste stream containing the <br />copper sulfate is sent directly to a publicly owned treatment works (POTW) and no other <br />releases of copper occur onsite to any other environmental media. Is the copper wire still <br />considered an article? <br />ANSWER: The copper wire is not reportable, but the copper sulfate is reportable as <br />copper compounds (category N100). In this case, estimate this output and use that <br />number of pounds as the input also. <br />12. QUESTION: A facility crushes light bulbs and uses the crushed glass in their process. <br />The light bulb stems are not used in the process and are disposed. There is a lead button <br />in each light bulb stem that is disposed. Is this button considered an article and therefore <br />exempt from threshold and other materials accounting calculations? <br />ANSWER: It depends. If the lead buttons were recovered and reused in manufacturing of <br />new light bulbs, and the lead buttons fulfill all article criteria, they would not be <br />reportable. But if they are disposed, then they would not be considered articles and the <br />lead would be reportable because it is removed from the manufactured article (light bulb) <br />during manufacturing. <br />-56- <br />