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Hazard Warning Signage System
UNIVERSITY OF MARYLAND, BALTIMORE
HAZARD WARNING SIGNAGE SYSTEM
HAZARD WARNING SIGNS
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.
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.
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.
The Office of Safety and Environmental Health will maintain the supply of warning signs and labels.
*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.
ACGIH TLV of 10 ppm or less
(a partial list)
SUBSTANCE TLV or ceiling level (C)
Arsine 0.05 ppm
Hydrogen sulflde 10 ppm