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CWC 181: Other Inorganic Solid Waste Site 2006 Quantity (lb) 2010 uantit (Ib) SLAC 35,062 8,421 LLNL 30,626 22,507 SNL/CA 3,076 2,399 Primary waste generators: For SLAC Overall Hazardous Waste and Process Description In 2010, 8,421 pounds of CWC 181 waste generated at SLAC. A breakdown by waste descriptions used in the SLAC hazardous waste tracking system is provided in the table below and compared with 2006 quantities. Waste Description 2006 Quantity Ib 2010 Quantity Ib RCRA Lead Contaminated Debris 12,936 3,903 Filter Cake 6,064 2,507 Debris wRJon-RCRA Metals 12,632 1,475 Beryllium and RCRA Metal Contaminated Debris and Non -Debris 317 536 Spent Resins with Copper 1124300' Acid and Alkaline Debris 1,943 1, 134' Total 35,062 8,421 1. JUU to 01 this waste was generated in 2010 under CWC 132 2. 1,13416 of this waste was generated in 2010 under CWC 513 Of the 8,421 pounds of CWC 181 waste generated in 2010 included Resource Conservation and Recovery Act (RCRA) Lead -Contaminated Debris, Filter Cake, and Debris with Non-RCRA Metal, and Beryllium and RCRA Metal Contaminated Debris and Non -Debris. The processes generating these wastes are: • Repair/upgrade and removal of experimental equipment and lead shielding generating lead and lead debris • Metal finishing operations (discussed earlier) generating filter cake from rinse water and aqueous waste treatment processes • Cleanup and maintenance activities that generate debris with non-RCRA metals • Experimental equipment repair/upgrade and removal generating beryllium or RCRA metals waste (RCRA Contaminated Debris and non -debris) Other processes and generating wastes included the closed-loop, low -conductivity cooling water system generating spent deionization resins and the use of chemicals metal finishing operations that generate empty chemical containers, acid and alkaline debris. These two waste streams were generated under CWC 181 in 2006 but were under different codes in 2010. Each of the processes and wastes are further discussed below. 4.1 Experimental Equipment with Lead Shielding - Renair/Urtgrade and Removal In 2010, 3,903 pounds of RCRA lead debris waste were generated, compared to 12,936 pounds generated in 2006. Equipment that uses lead shielding in various forms was dismantled, resulting in lead contaminated debris. While this waste stream may appear to be routine for SLAC, much of it constitutes legacy waste in the form of shielding that was in place over a period of several years and is now being removed because of the discontinuation of certain experiments. 4.2 Filter cake from Rinse Water Treatment Facility The major generator of this waste stream at SLAC is the Metal Finishing Operation Group (MFO) in the MFD, which performs plating of carbon steel, stainless steel, copper and aluminum parts. The various baths clean parts and plate them with metal such as nickel, copper, tin, rhodium, indium, silver and gold. Non -hazardous rinse water is generated by using tap or de -ionized water to rinse residual plating solutions from parts being plated. The non -hazardous rinse water and spent plating baths (Category A wastes — acids and alkaline with metals but not cyanide baths) are treated at the Metal Finishing Pretreatment Facility (MFPF), which allows SLAC to meet the sanitary sewer discharge requirements to the local POTW authorized under the Clean Water Act. The quantity of the filter cake will in part fluctuate from year to year based on the quantities of Category A wastes - alkaline cleaners (CWC 121) and spent acids (CWC 792) treated. 1. One major source reduction measure that has been implemented since 2006 was the electrochemical generation of ferric hydroxide, which is used as a coagulant/flocculating agent used in the sedimentation of metal precipitates. The electrochemical system provides better control of ferric hydroxide in the treatment process. An improved ferric chloride metering system acts as a backup for the electrochemical system. The electrochemical process provides tighter control of the iron hydroxide than ferric chloride injection. This in turn reduces the volume and weight of the sludge that is generated during the removal of metals in the sedimentation process. September 1, 2011 SB 14 Report 13 September 1, 2011 SB 14 Report