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Pcac-r-�v <br />BACKGROUND (cont) <br />4. Additional testing was conducted to confirm this waste <br />characterization/classification — samples were collected from: <br />L Wash water generated from washing out ink reservoirs and cylinders (process <br />conducted in the OPMR room) <br />• As a worst case sample, an ink reservoir and cylinder containing Process <br />Blue was selected <br />• Process Blue is the only ink that contains copper and zinc <br />ii. OPMR wash tanks <br />5. There is no process to wash cylinders at the press — therefore, there is no ink <br />wash water waste generated in this area. However, to obtain a worst case sample <br />for testing purposes, Pactiv artificially created wash down samples at the press - <br />samples were collected from: <br />i. An ink station at the press used to run Process Blue, as Process Blue is the <br />only ink that contains copper and zinc <br />ii. An ink station at the press used to run Red, as Red is the most common ink <br />currently ran at the facility <br />It should be noted that Process Blue represents approximately 0.07 % of total ink <br />Ink Wash Water Sampling <br />Locations <br />Initial Point <br />of Generation <br />Sample — ink <br />reservoir and <br />cylinder wash <br />down <br />(conducted <br />within OPMR <br />room) <br />11/20/2018 <br />2 <br />