COMPLIANCE INFO_PRE 2019 - Laserfiche WebLink

Home Browse Search

• Absorbents and rags from machines that inherently release oil during metal machining operations or from machines that leak. • Miscellaneous oily solids from old containers, cleaning of sumps, roofing and tarring operations, and other similar activities. Two compressor systems were replaced that generated approximately 4,000 pounds of oily and solvent solids. These new systems will generate significantly less oily and solvent solid waste in the future and desiccants are expected to last for several years. 7.5 Spent Machine Coolant (Cutting Fluid) from Machining Operations In 2006, SLAC generated 5,466 pounds of cutting fluid waste. By comparison, in 2010 SLAC generated 5,701 pounds of cutting fluid waste. Oil from machining operations is usually in the form of a soluble oil that is mixed with water and acts as a coolant for parts and tools in machining processes. In addition, non -soluble oils, usually called "tramp oils," are generated from lubrication of mechanical parts in the machine, e.g., gears and sliding worktables. Major source reduction measures recently implemented for coolants and tramp oils at SLAC have included the acquisition of new numerically controlled machines, which internally recycle and filter the cutting fluid. Other source reduction measures that have been implemented in the past include: • Selection of long -life coolants • Coolant makeup control • Machine cleaning and scrap metal removal • Machine repair to improve performance • Eliminating machine leaks • Eliminating duplicate machines • Selecting alternative cutting technologies such as electric discharge machining and high-power water jet machining It is expected that the above mentioned source reduction measures, particularly the acquisition of new machines, will help reduce machining coolant waste in the future for comparable production level. 7.6 Oil—Water Waste from Maintenance/Repair of Building and Electrical Equipment In 2010, the main generators of oil -water waste were by electrical equipment maintenance repair (1,700 pounds) and elevator pit maintenance (935 pounds), accounting for 2,635 pounds or 97 percent of the waste stream. The balance is from machine shop equipment maintenance activity. In 2006, only six operations or activities generated 1,287 pounds of oil -water waste. 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. For LBNL 7,7 Solid and Liquid Waste Contaminated With Oil From Routine Operations or Cleanup Solid (22% by weight) and liquid (78% by weight) wastes contaminated with oil from routine cleanup or other operations are generated at LBNL. This waste stream is typically generated as a result of numerous different machine operations at the sites. LBNL generated 8,497 lbs of this waste in 2006 and 769 lbs in 2010. Processes generating the waste include hazardous waste management facilities, machine shop areas, and various laboratory work areas. The waste stream consists of contaminated metal banding, leather and latex gloves, paper towels, oily rags, lab trash, absorbent materials, and liquids (water or coolants). LBNL evaluated the possibility of (a) implementing the rag -recycling program at other generator locations and (b) separating oil from water or coolants. Locations of the launderable rag program have reached all appropriate locations, and have resulted in a decrease of this wastestream. Also, the existing evaporator has been in existence since 1995, due to small quantity generators of this waste, additional locations that can use an evaporator to separate water from oil and coolant is not warranted. For SNUCA 7.8 914 -Machine Shop The Machine shop uses lathes, milling machines, drill presses, band saws, grinders, and other equipment to produce classified and prototype parts in support of all on-going projects at SNUCA. Certain machining tools require metal working fluid (coolant). The Machine Shop also uses lubricating and hydraulic oils in machining processes. In 2009 SNL management decided to close the machine shop at SNUNM. All of SNL machining work is now conducted at SNUCA. In addition several pieces of equipment were brought from SNUNM to SNUCA. The closure of the SNUNM Machine shop and their work being brought to SNUCA is the reason for the increase in the generation of the wastestream coolant/oil/water. September 1, 2011 SB 14 Report 25 September 1, 2011 SB 14 Report 26