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LLNL-AR-788093 <br /> External <br /> III. Category B Waste Streams <br /> Category B waste streams are defined as "All other hazardous wastes, <br /> including waste shipped off-site for treatment, recycling or disposal, <br /> manifested waste, and waste that is treated or disposed on site." <br /> 1. CWC 122: Alkaline Solution without Metals (pH> 12.5) <br /> Site 2018 quantity (lb) <br /> LLNL 11,755 <br /> 1.1 CWC 122—NIF B391 Grating Debris Shield (GDS) Optics Processing <br /> Site 2018 quantity(lb) <br /> LLNL 6,013 <br /> Apply photoresist coating <br /> and use basic solution to Spent <br /> develop patterns on glass developer <br /> optical surfaces. rinsewater <br /> (CWC 122) <br /> Off-site <br /> disposal <br /> Optics etched and <br /> returned for cleaning. <br /> Sodium <br /> Strip photoresist,rinse hydroxide <br /> Neutralize rinse water. solution <br /> (CWC 122) <br /> GDS optics <br /> FIGURE 111.1.1: NIF B391 GRATING DEBRIS SHIELD(GDS)OPTICS PROCESSING <br /> This process generates two CWC 122 waste streams. First, the optics are prepared for <br /> etching by applying a photoresist coating, which is developed using an alkaline solution. An <br /> acid is then used to etch the pattern into the optics. The photoresist film is stripped from the <br /> optics using an NaOH solution and the generated rinse water is neutralized in an automated <br /> batch neutralizer. Spent developer and NaOH solution is sent for off-site disposal. During <br /> 2018, 1,765 lbs. of spent developer rinse water and 4,248 lbs. of NaOH solution were <br /> generated. <br /> September 1, 2019 SB14 Plan III-1 <br /> ESH-EFA-P2S-19-16592 <br />