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Pr-� cT � v <br /> BACKGROUND (cont <br /> 4. Additional testing was conducted to confirm this waste <br /> characterization/classification — samples were collected from: <br /> i. gash 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 wash <br /> water waste generated in this area. However, to obtain a worst case sample for <br /> 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 /> used at the facility. <br />