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SOURCE REDUCTION/POLLUTION PREVENTION EVALUATION <br />Description of Measure: <br />The opportunity of treating au d reusing rinse water in a closed-loop water treatment <br />system is being reconsidered, but needs further investigation of technical and economic <br />feasibility. SLAC hired a consultant to look at the opportunity of reusing treated rinse <br />water. Some investigative work will have to be done to determine if a water recycling <br />system is economically feasible and sufficiently reliable to meet SLAC metal finishing <br />requirements. <br />The consultant provided some information on the use of a Reverse Osmosis (RO) <br />Resin and Deionization Resin (DI) System for treating rinse water and discharging the <br />RO reject waterto the existing MITE The RO system needs to be properly sized and <br />specified for the mix of rinse water that is generated by MFO. The cost -benefit of the <br />RO system will have to be investigated more closely since only certain rinse waters <br />can be sent to the RO system based on the cleaning and plating baths used. A DI <br />system also can be a candidate however the added waste stream, spent DI resins, needs <br />to be addressed in terms of costs and potential to recycle or treat on site. <br />Currently, the proposal from 2010 is being reviewed again in 2015. <br />Refected alternatives and rationale: <br />Additional countercurrent rinsing in SLAC metal finishing operations because of space <br />limitations and spray rinsing is not used because of ventilation issues and the potential <br />to fall short of cleaning requirements. <br />September 1, 2015 SB14 Plan ffi-15 <br />