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Raw Materials: <br />Cutting fluid, water, <br />machine oils <br />Metals being macbined.— <br />typically steel, stainless <br />steel, copper and aluminum <br />parts <br />Machining <br />Operations <br />Machined <br />Parts <br />Spent Coolants <br />from Machining <br />Operations <br />(CWC 223) <br />Off Site <br />disposal <br />FIGURE III.6.2. WASTE MACHINE COOLANT OIL GLTtERATION FiOW DIAGRAM <br />Hazardous Waste and Process Description <br />Oil from machining operations is usually in the form of soluble oil that is mixed with water <br />and acts as a coolant for parts and tools in machining processes. In addition, non -soluble <br />As, usually called "tramp oils," are generated from lubrication of mechanical parts in the <br />machine, e.g., gears and sliding worktables. <br />Hazardous Waste Management Approaches <br />Major source reduction measures recently implemented for coolants and tramp oils at SLAC <br />have included the acquisition of new numerically controlled machines, which internally <br />recycle and filter the cutting fluid. Other source reduction measures that have been <br />implemented in the past include: <br />o Selection oflong-life coolants <br />® Coolant makeup contr <br />ol • <br />• Machine cleaning and scrap metal removal <br />o Machine repair to improve performance <br />o Eliminating machine leaks <br />a Eliminatuig duplicate machines <br />o Selecting alternative cutting technologies such as electric discharge machining and <br />high-power waterjet machining <br />Itis expected that the above mentioned source reduction measures, particularly the <br />acquisition of new machines, will help reduce machining coolant waste in the future for <br />comparable production level. <br />SOURCE REDUCTIONlPOLLUTIONFREVENTION EVALUATION <br />Description of Measure: <br />SLAC will continue to upgrade to machines with more modern internal coolant <br />recycling systems. The other source reduction measures mentioned above will continue <br />to be used.'No other source reduction measures are being considered at this time. <br />September 1, 2015 SB14 Plan III"22 <br />