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LLNL-AR-788093 External 3. CWC 135: Unspecified Aqueous Solution Site 2014 uantit lb 2018 quantity (lb) LLNL 17,743 11,408 For LLNL 3.3 B391 HF Etching Solution This waste stream is generated from NIF optics processing operations. These processes have been optimized to generate the minimal amount of waste while producing the high quality optics required. For example, optics are batched to minimize solution change out between types, and baths are reused before spent etchant must be discarded and replaced. In 2009,NIF started implementation of an optics repair process to extend the life of the optics. This operation has continued to expand and reduces both the need to acquire new replacement optics and the chemicals used to process them. 4. CWC 181: Other Inorganic Solid Waste Site 2014 Quantity lb 2018 quantity (lb) LLNL 18,272 22,026 For LLNL 4.1 B291 Ion Exchange Resin,Activated Alumina or Carbon The low conductivity water coolers at Building 291 use ion exchange resin to strip copper from the water. The water is monitored for copper and when concentrations of copper are detected the ion exchange resin is exchanged; this occurs approximately every seven years. The process generated 18,272 lbs of waste in 2014 but no waste in 2018 because change out of ion exchange resin did not occur. Air is compressed and containerized at Building 291 for various laboratory uses. Activated alumina and carbon are used to remove moisture from the air during this process. Over time the activated alumina and carbon desiccants become ineffective and must be exchanged; this occurs about every 3 to 5 years. The spent desiccants are collected and disposed of as hazardous waste. No ion exchange resin waste was generated from Building 291 during CY2018. September 1, 2019 SB 14 Report III-2 ESH-EFA-P2S-19-16592