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Advanced Interconnect Technologies <br />Source Reduction Plan <br />Page 7 <br />5.2.2.1. Used Ensolv — Ensoly, a vapor degreasing solvent, is <br />used to clean and remove oil from stamped aluminum <br />parts prior to anodizing. The solvent is changed when the <br />solution becomes saturated with dissolved oils/metals. <br />5.2.3. Anodizing Process — The anodizing process generated 2,700 lbs <br />of non -aqueous Spent DI Sys Media, 92,900 lbs. of aqueous <br />anodizing solution with a pH < 2, and 445,935 lbs. of aqueous <br />rinse water with a pH > 12.5 in 1998. <br />5.2.3.1. Spent DI System Media — Deionized water is required for <br />the anodizing process in order to supply high quality water <br />for process chemical bath makeup and rinsing. <br />Approximately every two years the various deionizing <br />media must be replaced with fresh media in order to <br />maintain the high water quality required for anodizing. <br />5.2.3.2. Anodizing Solution (pH < 2) — The anodizing tanks are <br />filled with a solution containing DI water, a small amount <br />of sulfuric Acid , and a larger amount of a organic acid. <br />The resulting pH is — 0. 9 initially but increases to — 1.8 <br />prior to disposal. Each bath is "dumped" approximately <br />twice a month (-2,000,000 amp min.) due to a build up of <br />metal and organic contaminates. <br />5.2.3.3. Rinse Water (pH > 12.5) — A constant flow, during <br />operating hours, of fresh DI rinse water at a rate of 0.5 <br />gal/min. is provided to tank 12 on anodizing line 1. This <br />flow is required in order to sustain the pH and chemical <br />concentration levels carried over from the process <br />chemical contained in Tank 11. <br />5.2.4. Lead Treatment Process — The lead treatment process generated <br />4,740 lbs of non -aqueous Spent Lead Filters and 4,050 lbs. of <br />non -aqueous Lead Sludge in 1998. Lead is introduced from lead <br />cathodes used in the anodizing process. <br />5.2.4.1. Spent Lead Filters — Inline filters are placed between the <br />settling tank and final pH adjust tank and also on each <br />anodizing tank. The filters remove large particles which <br />contain lead levels in excess of 5ppm. The filters are <br />replaced approximately twice a month. <br />5.2.4.2. Lead Sludge — In order to reduce anodization solution <br />lead levels below required POTW levels the solution is <br />