Clearance tags communicate whether a vacated facility has or has not been cleared for entry. (When a research group vacates a laboratory, EH&S performs a clearance survey to ensure hazards are not left behind.)

Laser signs indicate the presence of high energy laser equipment. Unauthorized entry is prohibited. Appropriate eye protection may be required.

Health hazard symbol

Radiation signs indicate that the room contains certain quantities of radioactive material. Strict requirements govern use, storage, and disposal of radioactive materials and equipment. All labs are regularly checked by laboratory staff and Environment, Health & Safety (EH&S) to make sure they are not contaminated.

Biohazard signs feature the biohazard symbol (black on orange is common) to indicate the use of infectious agents. Containment of biohazardous material is strictly regulated, and researchers are trained to disinfect work areas after use.

Hazardous waste signs identify collection areas for hazardous wastes. Treat hazardous waste containers with the same caution used for other stored chemicals and hazardous materials.

Hazard symbols

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Hazard and caution signs identify facilities where work involves hazardous chemicals, infectious biological agents, radioactive materials, or equipment such as lasers, high voltage systems, or powerful magnets. These materials and equipment are generally controlled and contained, and their hazards minimized.

Corrosive symbol

Do not enter an area with a sign that warns against unauthorized entry or says Keep Out, unless specifically authorized to do so. Hazardous materials and equipment must be secured or removed from UC San Diego facilities before service or construction work may begin.

High voltage signs signal a sustained voltage of more than 600 volts. High voltage systems may be accessed only by a qualified electrician.

All labs must have a Laboratory Room Sign posted outside of the entrance. This sign details the primary contacts for the lab, room hazards and responsible persons.

Lockout/ tagout (LOTO) practices ensure that all energy sources are disengaged or blocked, and that electrical sources are de-energized and locked in the "off" position during work or repair.

Hazard symbols and meanings

This sign must be updated anytime users change locations and/or posted hazards change. Room signs need to be printed in color. Internal rooms with additional hazards (or change in hazard from outer lab) must also have a room sign.

BSL signs posted at a facility entrance specify the biosafety level (BSL) of containment and operational precautions observed within.

GHS pictograms

hazard symbols意思

Clean Areas are not permitted in rooms where Aerosol Transmissible Pathogens are manipulated or rooms approved at biosafety level 2+ or 3.

Eating, drinking, food storage, application of cosmetics, and handling of contact lenses in research laboratories is permitted only in approved, posted Clean Areas.

A facility may be BSL 1, 2, or 3, with 3 being the highest level of precautions. BSL 3 labs are rare at UC San Diego. Unauthorized entry into BSL 3 labs is prohibited.

Carcinogens are strictly regulated and are generally well-contained. Researchers are trained to carefully identify where carcinogens are being used and to decontaminate work areas after their use.

Report hidden hazards discovered after work begins (such as broken glass, needles, or small amounts of mercury metal in drain traps) to your supervisor or the responsible Department Safety Coordinator (DSC). Do not resume work until the hazard has been corrected.

People with cardiac pacemakers or other implanted medical devices should keep out. Check with your physician if you have questions about working in the vicinity of powerful magnets.