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LLNL-AR-788093 <br /> External <br /> 3. CWC 134: Aqueous Solution With Total Organic Residues Less Than 10 <br /> Percent <br /> Site 2018 quantity (lb) <br /> LLNL 852,409 <br /> 3.1 B322 Plating Shop Rinsewater Recycling <br /> Site 2018 quantity (lb) <br /> LLNL 852,409 <br /> Processed Metal Parts, B322 metal <br /> Plating Chemicals, parts surface Product: <br /> City Water, 10 cleaning, surface Rinsed metal <br /> preparation, parts <br /> metal etching, <br /> plating,dyeing <br /> Recycled Evaporator Off-site <br /> Water (CWC 134) disposal <br /> FIGURE 1II.3.1: PLATING SHOP FLOW DIAGRAM FOR RECLAIMED RINSE WATER <br /> PROCESS <br /> Water generated from the rinsing of parts in the B322 plating shop is typically contaminated <br /> with organic chemicals and hazardous metals used in plating operations. <br /> While the shops employ pollution prevention measures to minimize wastewater generation <br /> during rinsing operations by using spray rinsing of parts rather than drag out rinsing, this is <br /> still one of the largest hazardous waste streams at LLNL. However, the bulk of this waste <br /> stream is reconditioned and recycled through B322 evaporator unit. Because this single waste <br /> stream is so large, it was excluded when calculating LLNL Category B wastes so as not to <br /> dwarf other waste streams of significance. <br /> The volume of waste is dependent on workload and can vary from year to year. <br /> SOURCE REDUCTION/POLLUTION PREVENTION EVALUATION <br /> Description of Measure: <br /> LLNL plans to continue with current source reduction measures using the evaporator to <br /> reclaim rinse water and return it back to the plating shop for reuse as a water <br /> conservation measure. <br /> No other source reduction measures are planned at this time. <br /> September 1, 2019 SB14 Plan III-6 <br /> ESH-EFA-P2S-19-16592 <br />