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SLAC will continue to upgrade to machines with more modern internal coolant recycling systems. The other source reduction measures mentioned above will continue to be used. No other source reduction measures are being considered at this time. SLAC met with the staff from the Mechanical Fabrication and Klystron Departments, the two areas that use machine coolants, to discuss the use of portable oil recycling systems to filter, skim and recondition the coolant for Meuse in the machines. The portable system would be periodically connected to a coolant collection vessel in the machine and activated to process the oil. The portable system would be disconnected when the machine is in use. This alternative was rejected because most new machines have their own internal filtering and skimming systems forming a closed-loop that helps reduce the need for connecting additional equipment. 6.4 Oil—Water Waste from Maintenance/Repair of Building and Electrical Equipment Site _ _ 2010 quantity (lb) SLAC 12,641 Raw Material ui ment: yE9 P Oil and water s waste from Offcil Maintenance! Largc Oil -Containing Repair Building and disposal Electrical Equipment Equipment Repair Building Elevators (CWC 223) Oil with Water Intrusion FIGURE I11.6.4. OIL -WATER WASTE GENERATED FROM BUILDING MAINTENANCE AND EQUIPMENT REPAIRS WASTE GENERATION PROCESS Hazardous Waste and Process Description High voltage electrical equipment is maintained by SLAC Power Conversion Group. Some electrical equipment degrades over time such that water or moisture gets into the dielectric fluid and has to be replaced. If the equipment is at the end of its useful life, it may be removed from service and replaced with more reliable electrical equipment. Equipment maintenance and removal is ongoing in which, where applicable, more reliable equipment is purchased to reduce the frequency of replacement. The oil -water waste generated from elevator pit repair has been an ongoing problem. Oil from elevator equipment can mix with ground water that intrudes into the elevator shaft, thus the oil -water waste that accumulates and has to be removed from time to time. Hazardous Waste Management Approaches Some oil -filled equipment may also be phased out due to ongoing changes in operational needs as well as experimental needs. It is an ongoing activity to develop and use more reliable equipment over time that significantly reduces the frequency of generating oil - water waste. SLAC Facilities has come up with an approach to prevent this problem and will be installing some fixes to address this problem in the near future by collecting and returning the oil to the same elevator equipment from which it came, this keeping the oil separated from the intruding ground water. The ground water will be checked to see that it is oil - free and discharged to the sanitary sewer. Oil -water waste from this source is expected to be eliminated in the near future. SOURCE REDUCTION/POLLUTION PREVENTION EVALUATION Description of Measure: September 1, 2011 SB 14 Plan 46 September 1, 2011 SB 14 Plan 47