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BUMED INSTRUCTION 6260'30

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Mercury is a health hazard if significant amounts are ingested, inhaled or ... should use a amalgamator, which encloses the capsule during amalgamation. ... – PowerPoint PPT presentation

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Title: BUMED INSTRUCTION 6260'30


1
BUMED INSTRUCTION 6260.30
  • MERCURY CONTROL PROGRAM FOR DENTAL TREATMENT
    FACILITIES

2
BACKGROUND
  • Mercury vaporizes at room temperature
  • Mercury is a health hazard if significant amounts
    are ingested, inhaled or absorbed through the
    skin.
  • Pre-encapsulated amalgam has reduced exposure to
    mercury vapor.

3
DISCUSSION
  • Mercury vaporizes at room temperature and
    concentrates more rapidly in confined spaces.
  • Mercury has no warning properties like color or
    odor.
  • The permissible exposure limit to mercury vapor
    is .05mg/c³ of air.

4
DISCUSSION
  • Since the use of pre-encapsulated amalgam,
    mercury contamination is limited to
  • debris from excavations of dental restorations
    falling to the floor
  • improper storage of scrap amalgam
  • accidentally breakage of amalgam capsules

5
DISCUSSION
  • Air sampling for mercury vapor is not required
    but may be performed at the discretion of the
    cognizant industrial hygienist.
  • Biological monitoring may be prescribes by the
    OCC Health professional as circumstances warrant.
  • Biological monitoring shall be done by urine
    mercury analysis at an IH lab.

6
DISCUSSION
  • Pregnant personnel require a mercury exposure
    screening.
  • Commanding Officers and Officers In Charge are
    overall responsible for fulfilling requirements
    of the mercury control program.

7
PERSONAL HYGIENE
  • All jewelry shall be removed that has the
    potential to become contaminated.
  • No food, drink or tobacco products authorized
    while working with mercury bearing materials.
  • Gloves are to be worn when handling mercury
    products to minimize skin contact.
  • Wash hands after working with mercury and before
    leaving the treatment room.

8
WORK SURFACES
  • Work surfaces need to be made of an impervious
    material, preferably stainless steel or plastic
    laminate.

9
HANDLING
  • Personnel will use a no touch technique for
    handling amalgam
  • After triturating of pre-encapsulated amalgam,
    personnel shall use an amalgam well while loading
    the amalgam carrier.
  • Personnel will use water spray and high volume
    evacuation when cutting or grinding restorations

10
HANDLING
  • All amalgam scraps should be collected before
    removing the rubber dam.
  • Personnel should use a amalgamator, which
    encloses the capsule during amalgamation.
  • The amalgamator is to be inspected weekly for
    mercury globules and cleaned.
  • Amalgamator is disassembled only by qualified
    dental repair specialist.

11
HANDLING
  • An impervious catch tray shall be used underneath
    the amalgamator.
  • Amalgamators, capsules, and any other items that
    may be contaminated with mercury shall be store
    in the impervious catch tray.
  • These items shall be checked at least weekly for
    mercury droplets.

12
Waste
  • Dental amalgam is an intermetallic compound
    comprised of various proportions of silver,
    copper, tin, and zinc alloy mixed with pure
    mercury.
  • Amalgam scraps can be stored dry without
    exceeding any PEL for mercury vapors in the
    breathing zone of dentists and technicians.

13
WASTE
  • Dry amalgam scraps shall continue to be recycled
    for the precious silver metal content and will
    not be disposed of as a hazardous waste.
  • All dental scraps shall be transferred to the
    local DRMO in a tightly closed non-breakable
    container.
  • Label container as Non-Hazardous Dental Scrap
    Metal.

14
FLOORS
  • Vinyl sheeting is the preferred floor covering
    material for DTRS.
  • Carpets are not permitted.
  • Seamless floors are preferred.

15
Mercury Decontamination And Spill Cleanup
Procedures
  • A mercury decontaminant, such as HgX, shall be
    readily available for immediate mixing and
    application to a contaminated surface.
  • Care shall be used during removal of large
    droplets.
  • When mercury contamination occurs, it shall be
    cleaned up immediately.
  • Eating, drinking, and smoking shall be prohibited
    during cleanup procedure.

16
Mercury Decontamination and Spill Cleanup
Procedures
  • Patient examination gloves shall be worn during
    cleanup.
  • Collected mercury shall be placed into a sealed,
    suitable liquid and vapor tight container and
    removed to a designated area for disposal as
    mercury waste.
  • Contaminant surfaces shall be scrubbed with
    mercury decontaminant to convert any trapped
    mercury.

17
Mercury Decontamination and Spill Cleanup
Procedures
  • Any equipment or instruments, such as
    amalgamators, which become contaminated with
    mercury shall be thoroughly cleaned with mercury
    decontaminant.
  • The cognizant industrial hygiene office shall be
    contacted to test the decontaminated area and
    equipment for residual mercury.

18
MERCURY DISPOSAL
  • Mercury and mercury compounds shall not be dumped
    into any body of water including open seas or
    oceans, or intentionally released into any ships
    waste disposal system.
  • Shipboard mercury storage and handling areas
    shall not be connected to deck drainage systems.

19
MERCURY DISPOSAL
  • For shipboard only, all mercury-contaminated
    waste, including scrap amalgam, shall be
    collected, packaged with a double boundary of
    confinement using plastic bags, sealable drums,
    or polyethylene bottles, and labeled.
  • For shore facilities, packaged mercury waste
    shall be disposed of in cooperation with the base
    environmental public works department.
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