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SGS-Thomson Microelectronics

Year Submitted: 2003

Process: Waste Collection

Industry: Electronics Manufacturing

Wastes Reduced: Oil

Substance: Oil with Freons

Location: Carrollton, Dallas County TX

No. of employees: 1100


The goal of the project was to reduce the amount of waste oil generated in 1990 that was contaminated with F001-F005 land- ban solvents, particularly Freon.

P2 Application:

In addition to using traditional methods of employee awareness and education of the problems associated with disposal of contaminated waste oil, a plan for charging back disposal costs to affected cost center budgets was proposed in early 1990 as an economic disincentive. Annual hazardous waste disposal costs are normally expense-budgeted through the Facilities Department. It was determined that a controlling function could be added to the existing cost accounting system to itemize and charge back avoidable disposal costs to the departments that generate the waste. Since the areas that produce the majority of waste oil are part of manufacturing, such charge-backs would impact those budgets directly. Proposal of the charge-back procedure brought about an immediate response from the affected areas for improved oil handling, collection and change-out procedures that would significantly reduce contamination. As yet, there has been no subsequent need to implement the charge-back procedure.

Environmental Benefits:

In 1989, 13 drums of solvent contaminated oil were generated. Only one drum out of a total of seven was contaminated in 1990. The off-spec oil in most cases had been shown to far exceed the 1000 ppm limit for total organic halogen. Since this is a listed hazardous waste on the company's NOR, shipments off-site require manifesting and reporting. Reduced generation has resulted in reduced storage, transport and disposal liabilities. In addition, segregated Freons could be accumulated for recycling. The direct burning of off-spec solvent contaminated used oil can produce various by-product VOC's or NOx emissions, which may contribute to the formation of ground level ozone. These potential emissions are also avoided. Used oil that meets regulatory requirements can be offered for reclaim, recycle, or burned for energy recovery much more readily, thereby reducing the burden for documentation and tracking. The six drums of used oil generated in 1990 that were not contaminated were offered to Dallas Oil Service for reclamation.

Details of Reductions

Additional Information :

The company manifests its off-spec solvent contaminated used oil to Heat Energy Advanced Technology in Dallas, Texas, where it is fuel blended to lower the contaminant levels. The cost for disposal is $66 a drum. In addition, H.E.A.T. also purchases spent Freon-113 for distillation and subsequent marketing as a technical grade Freon solvent. SGS-Thomson receives a credit of $1.62 a gallon for its spent Freon. Cost Savings to SGS-Thomson: (for one year) Average level of contamination per drum = 0.75% (7500 ppm TOX) 0.0075 x 55 gal/drum = 0.4 gal Freon per drum 6 drums avoided in 1990 x 0.4 gal = 2.4 gal Freon Disposal of 6 drums solvent contaminated oil @ $66 ea. = $396 Texas hazardous waste fee = 50 Manifesting/reporting requirement burden 2 hrs = 34 Credit for recovered Freon to be reclaimed @ $1.62/gal = 4 Total cost recovered/avoided = $488

Source: TCEQ

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