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LLNL-AR-788093 <br /> External <br /> IV. CATEGORY C Waste Streams <br /> Category C waste streams are defined as "Wastes that are classified as extremely <br /> hazardous wastes." <br /> 1. CWC 135: Unspecified Aqueous Solution <br /> Site 2018 quantity(lb) <br /> LLNL 34 <br /> 1.1 B153 HF (49%) Solution <br /> Site 2018 quantity (lb) <br /> LLNL 34 <br /> Raw Materials: <br /> Hydrofluoric acid Silicon dioxide and Off-site <br /> silicon nitride etching disposal <br /> (CWC 135) <br /> FIGURE IV.1.1: GLASS ETCHING PROCESS <br /> This waste stream is generated from routine lab operations and is disposed of off-site. <br /> SOURCE REDUCTION/POLLUTION PREVENTION EVALUATION <br /> Description of Measure: <br /> LLNL plans to continue existing best management practices to minimize this waste <br /> stream. No other source reduction/pollution prevention measures are planned. <br /> September 1, 2019 SB 14 Plan IV-1 <br /> ESH-EFA-P2S-19-16592 <br />