Hazard Warning Signage System

UNIVERSITY OF MARYLAND, BALTIMORE
HAZARD WARNING SIGNAGE SYSTEM

HAZARD WARNING SIGNS

I. PURPOSE

A system of signs has been designed to bring uniformity to the hazard warning signs used at the University of Maryland. This guide describes the signage system and sets the conditions under which the signs are to be posted. It is important that all employees and visitors comply with the policy for entering areas where these signs have been posted, such as laboratories, cold rooms, warm rooms, chemical storage areas, and autoclave rooms.

II. DESCRIPTION

The 10" x 10" hazard warning sign illustrated below is to inform personnel and visitors that a hazard exists in the area. Up to 8 labels can be posted per sign, consisting of hazard symbols, hazard warnings, personal protective equipment requirements, and required work practices. If more than 8 hazard types exist in the space, the greatest hazards or those existing in the largest quantity should be chosen. The access restriction shall be determined by the greater hazard. The text accompanying the labels specify conditions warranting posting of these labels.

III. RESPONSIBILITY

It is the responsibility of the laboratory supervisor to determine the need for the hazard warning(s) and to contact the department of Environmental Health and Safety (EHS) to determine the level of hazard in the area. The laboratory supervisor needs to provide the emergency contact information for the placard such as the name, day/nighttime telephone numbers of the laboratory supervisor or other responsible person(s). Listed emergency contact person(s) must have some familiarity with the hazards in the posted location. After initial posting, the laboratory supervisor must contact EHS whenever a change in specific conditions and/or emergency contact occurs. EHS will maintain records of all areas posted. 

Hazard Warning Signage/Door Signs can be requested at MyEHS, are made available free of charge, and will be posted by EHS personnel.  

IV. AVAILABILITY

The Office of Safety and Environmental Health will maintain the supply of warning signs and labels.

 

 

HAZARD WARNING LABELS

This Biohazard label should be posted outside laboratories or storage rooms where multiple biological hazards and/or biological wastes are stored. Laboratories using or storing potentially infectious materials (e.g., human blood) should be posted with this label. If you are working with biohazardious materials, the laboratory containment level (e.g., BSL-2) also should be chosen. Please see the CDC link for more information.

This Biohazard/Infected Animals labelshould be posted outside animal rooms and other containment areas that house animals deliberately infected with agents requiring Biosafety Level 2 or greater. If you are working with biohazardious materials, the laboratory containment level (e.g., BSL-2) also should be chosen. Please see the CDC link for more information.
This Biosafety Level 2 (BSL 2) label, with the appropriate biohazard warning, designates a containment level that meets the BMBL* recommendations for BSL 2 work practices, safety equipment, and facility design.
This Biosafety Level 3 (BSL 3) label, with the appropriate biohazard warning, designates a containment level that meets the BMBL* recommendations for BSL 3 work practices, safety equipment, and facility design.
This Chemical storage area label should be posted outside chemical stockrooms or storage rooms used by multiple users or high-volume users for chemicals storage.
This Corrosion label should be posted outside laboratories or storage rooms where corrosive materials (e.g., concentrated acids or bases) are used and/or stored. Examples include hydrochloric acid, acetic acid, sodium hydroxide, ammonium hydroxide, and battery acids.

This Environment (Non-Mandatory) label should be posted outside laboratories or storage rooms where materials determined to be toxic to aquatic life are used and/or stored.

This Exclamation Mark label should be posted outside laboratories or storage rooms where irritants, skin sensitizers, acute toxins (harmful not fatal), respiratory tract irritants, or materials that exhibit narcotic effects or are hazardous to the ozone layer are used and/or stored.

This Exploding Bomb label should be posted outside laboratories or storage rooms where explosives, self-reactive materials, or organic peroxides are used and/or stored.

 

This Flame Over Circle label should be posted outside laboratories or storage rooms where oxidizers are used and/or stored. Examples include oxygen, chlorine, peroxides, nitric acid, perchlorates, and permanganates.

This Flammable Materials label should be posted outside laboratories or storage rooms where flammable materials including flammable solids, gases, and liquids, are used and/or stored. Examples include hexane, toluene, ethanol, isopropanol, and acetone.

This Gas Cylinder label should be posted outside laboratories or storage rooms where compressed gases are used and/or stored. Examples include compressed carbon dioxide, oxygen, and nitrogen gases.

This Health Hazard label should be posted outside laboratories or storage rooms where carcinogens, mutagens, reproductive toxins, respiratory sensitizers, target organ toxins, or aspiration toxins are used and/or stored. Examples include benzene, acrylamide, formaldehyde, many chemotherapeutic drugs, and ethidium bromide.

This Hearing Protection Required label shall be posted outside laboratories where there is a potential for noise exposure that may equal or exceed an eight-hour time-weighted average sound level (TWA) of 85 dBA.
This Laser Radiation label will be posted outside laboratories where Class 2, 3, or 4 lasers are used or stored. Protective eyewear that absorbs the exact wave length of light produced by the laser in use shall be worn by all personnel with potential for exposure to this laser source or to the reflected beam.
This Protective Clothing Required label shall be posted outside laboratories when work conditions require specific protective clothing that is beyond the standard laboratory coat.
This Radioactive Materials label will be posted outside laboratories where radioactive materials are used or stored or where radioactive wastes are accumulated.
 

This Skull-and-Crossbones label should be posted outside laboratories or storage rooms where acute toxins (fatal or toxic effects) are used and/or stored.

 

This Water Reactive label should be posted outside any laboratory or storage area that contains a material that may react with water to become spontaneously flammable or to give off flammable or toxic gas or create some other hazardous condition.

*CDC/NIH 1993 Biosafety in Microbiological and Biomedical Laboratories. 3rd Edition. U.S. Department of Health and Human Services, Public Health Service, and subsequent revisions.

TOXIC GASES

ACGIH TLV of 10 ppm or less
(a partial list)

 

SUBSTANCE TLV or ceiling level (C)

Arsine 0.05 ppm
Boron trichloride 1 ppm
Boron trifluoride 1 ppm C
Butadiene 10 ppm
Chlorine 1 ppm
Cyanogen 10 ppm
Diborane 0.1 ppm
Dimethylamine 5 ppm
Hydrogen bromide 5 ppm
Hydrogen chloride 5 ppm C
Hydrogen fluoride 3 ppm C
Hydrogen selenide 0.05 ppm

Hydrogen sulflde 10 ppm
Methyl mercaptan 0.5 ppm
Monomethylamine 5 ppm
Nitrogen dioxide 3 ppm
Phosgene 0.1 ppm
Phosphine 0.3 ppm
Silane 5 ppm
Silicon tetrafluoride 0.1 ppm
Sulfur dioxide 2 ppm
Sulfur tetrafluoride 0.1 ppm C
Trimethylamine 5 ppm