Thayer Personal Protective Equipment

Essential Information on Personal Protective Equipment:
Hazard Assessment and Use Requirements for the Thayer School

The Occupational Safety and Health Administration (OSHA) requires that personal protective equipment (PPE) be selected, provided and worn in situations where PPE could help reduce the potential for harm and injury (29 CFR 1910.132). This guide outlines the likely situations and hazards that require the use of PPE in the Thayer School of Engineering's instructional and research activities. Gloves and safety glasses are available in most laboratories, through the Thayer Instrument Room, and through the Dartmouth Scientific Stockroom. Hats for hair restraint are available in the machine shop. Specialized PPE, such as breathing apparatus and laser safety goggles require training for proper use, and are provided by the supervisor of the laboratory containing hazards that require such equipment.

Eye and face protection (29 CFR 1910.133): Safety glasses are required in the machine shop, wherever protection is needed from flying objects, and when working with hazardous chemicals or liquid nitrogen. All eye protection must meet ANSI standard Z87.1-1989. Contact lenses are not recommended where chemical splash or fume hazards are present; persons wearing contact lenses in such situations should inform their supervisor. Specialized eye protection must be worn as required--such as with certain lasers, UV lamps, and x-ray equipment. Appropriate face and neck shields must be worn when welding or performing any hazardous operation outside a fume hood that could result in chemical splashes, sprays, or irritating mists of corrosive or caustic materials. Face and neck protection must be used when there is danger from a system under pressure (positive or negative). Faceshields provide good protection to the eyes, face and neck against flying particles, sprays of hazardous liquids, splashes of molten metal and hot solutions. They are not recommended for eye protection; safety glasses should be worn underneath the faceshield.

Foot protection (29 CFR 1910.136): No open-toed shoes or sandals are to be worn in the machine shop or any laboratory with significant dangers from falling or spilled materials such as chemicals, cryogenic fluids, or heavy or sharp objects.

Hand protection (29 CFR 1910.138): Appropriate gloves must be worn for operations involving material or equipment that has a potential for: a chemical burn, a cryogenic burn (liquid nitrogen), a thermal burn (furnaces), absorption through the skin, an electrical hazard, a biohazard, or any acute or chronic toxicity hazard.

Selection of chemically resistant gloves must consider: (1) the chemical handled and (2) its ability to permeate various glove materials, (3) the task(s) to be done and required dexterity and (4) any special concerns. For chemicals of unknown toxicity or those chemicals that have a special skin hazard designation--a flexible laminate glove (Silver Shield or 4H) is to be worn under a pair of heavy duty chemically resistant outer gloves. Information on glove selection and chemical resistance is available through the Thayer Instrument Room and Environmental Health and Safety.

Respiratory protection (29 CFR 1910.123): Respirators may only be worn by participants in the DC Respiratory Program--Call EHS (646-1762). Dust masks may be worn for protection against non-hazardous particulates, however use of containment such as in a fume hood is preferred.

Hearing protection (29 CFR 1910.95): Hearing protectors must be worn when operating high sound level equipment. Foam plugs and earmuffs are available in the machine shop.

Other protection: Persons working in chemical laboratories or operating machinery must restrain hair and avoid torn or loose clothing (such as neckties). In these areas, pants, shorts, skirts, and dresses must extend below the knee unless a closed lab coat is worn that extends below the knee.

This Certification of Tasks Requiring Personal Protective Equipment for the Thayer School of Engineering Personnel Prepared in Compliance with 29 CFR 1910.132 Adopted by Thayer faculty 3/12/98.


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