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2. CWC 134: Aqueous Solution With Total Organic Residues Less Than 10 Percent Site 2010 quantity (lb) LLNL 1914,534 2.1 B322 Plating Shoo Rinse water Recycling Site 2010uantit Ib LLNL 1914,534 Raw Materials: B322 metal Processed Metal Parts, parts surface product: Plating Chemicals, cleaning, surface Rinsed metal City Water, preparation, pans Reclaimed Water from metal etching, Evaporator Unit plating, dyeing CWC 134,132 and 792 Evaporator Water Reclamation Unit Recycled I CWC 132 or 792 1 Offsite -1 Water Concentrate from cleanout disposal FIGURE 111.2.1. PLATING SHOP FLOW DIAGRAM FOR RECLAIMED RINSE WATER PROCESS Water generated from the rinsing of pans in the B322 plating shop is typically contaminated with organic chemicals and hazardous metals used in plating operations. While the shops employ pollution prevention measures to minimize wastewater generation during rinsing operations by using spray rinsing of parts rather than drag out rinsing, this is still one of the largest hazardous waste streams at LLNL. The wastewater generated from this process is reclaimed using an evaporator unit, hard - plumbed into the B322 shop's rinse water collection system. Water processed in the evaporator is then reused as rinse water in the shop. September 1, 2011 SB 14 Plan 18 The 2007 SB 14 Plan included a CWC 134 waste stream of 1,344,102 pounds (approximately 168,000 gallons), which was attributed to rinse water processed and reused in the Engineering plating shop. Although a large volume of water was processed through the unit, only a small fraction (approximately 660 gallons/year) was actually disposed of as hazardous waste. The remaining liquid was returned to the plating shop process for reuse. Because the water was reclaimed and reused, the 2007 SB14 Plan did not include it in Category B calculations, although it was documented in the plan. For consistency, we are documenting the waste stream associated with the reclaimed rinse water unit here, but as in 2006, we are not including it in our Category B calculations. For 2010, the reclaimed rinse water unit is still operational and continues to generate only about 330 gallons every six months. Description of Measure: LLNL plans to continue with current source reduction measures using the evaporator to reclaim rinse water and return it back to the plating shop for reuse. No other source reduction measures are planned at this time. September 1, 2011 SB 14 Plan 19