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12. CWC 792: Liquids With pH52 With Metals <br />Site <br />2010 quantity lb <br />2014 quantity (lb) <br />LBNL <br />8,010 <br />62239 <br />SNUCA <br />2,781 <br />935 <br />For LBNL <br />121 Ultra Hieh Vacuum Cleanins Facility <br />This waste stream is generated as a result of metal surface cleaning operations. Metal <br />parts are cleaned through a multi -step process including the following: <br />• Ultrasonic aqueous degreasing, <br />• Washing with commercial industrial cleaners (such as 909, B.N., Blue Gold, and <br />Mirachem 500 cleaners), <br />• Surface cleaning with acidic solutions, and <br />• DI -water and tap water rinsing. <br />The waste stream consists of acidic wastes that contain particles and dissolved metals. <br />LBNL evaluated the possibilities of extending the useful life of the acidic solutions. The <br />evaluation concluded that extending the useful life of acidic solutions is not technically <br />feasible. The reduction in generation in 2010 is due to decreased operations. <br />For SNL <br />12.2 Platin¢ Operations <br />This waste stream is generated from the plating operation in Bldg. 943, which is treated <br />in a closed loop system. In 2010 the system was drained for a tank assessment, which <br />resulted in higher than normal waste generation. In 2014 this bath was restored to normal <br />service, explaining the reduced quantity of waste. <br />September 1, 2015 SB 14 Report <br />