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Dental Amalgam

Dental Amalgam. Dennis Bowhay HWTR Program Ecology (360) 407-6881 or (509) 454 -7866. Mercury Dental Amalgam. Approx 50% mercury (silver copper tin) 450 mg per restoration (25% unused) 711 placements per year. Scrap Amalgam. Trap Amalgam. Vacuum Pump Filter Amalgam.

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Dental Amalgam

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  1. Dental Amalgam Dennis Bowhay HWTR Program Ecology (360) 407-6881 or (509) 454 -7866

  2. Mercury Dental Amalgam • Approx 50% mercury (silver copper tin) • 450 mg per restoration (25% unused) • 711 placements per year

  3. Scrap Amalgam

  4. Trap Amalgam

  5. Vacuum Pump Filter Amalgam

  6. Quantity of Amalgam Waste • 34 ounces scrap amalgam per month • No estimate for Trap waste • No estimate for Vacuum filter waste

  7. Designation of Amalgam Wastes • Scrap Amalgam failed TCLP nearly all of the time • Trap Amalgam failed TCLP about half of the time • Vacuum Filter Amalgam failed in one sample

  8. Conclusion • Amalgam Wastes must be designated by testing unless recycled or disposed of as MRW

  9. Sources of Amalgam • Scrap Amalgam • Contact and Non-contact • Trap Amalgam • Vacuum Pump Filter Amalgam

  10. Information Sources • “Management of hazardous dental wastes in King County, 1991-2000”, Hazardous Waste Management Program,October 5, 2000 • “Mercury in King County”, The Local Hazardous Waste Management Program in King County, November 2002

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