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Definitions (5)

Air sampling. The collection of samples of air followed by laboratory analysis to measure the presence and concentration of chemical, physical, or biological pollutants in the air

Analytical method. A standardized laboratory procedure used to determine the amount or concentration of a certain contaminant in an air or wipe sample

Area air sampling. The collection of air samples from a fixed location in a work area

Biological hazard. Hazard from biological agents such as viruses, bacteria, spores, fungi, bloodborne pathogens.

Casual visitor. Individual coming to the SLAC campus for a period of no more than 30 days per visit, whose visit does not involve unescorted entry to industrial/accelerator or other areas where unique SLAC hazards warrant limited access, and whose visit is for the following types of purposes: attending public lectures, public tours, or other activities open to the public; attending workshops, conferences, and collaboration meetings; use of the Linear Cafe (SLAC cafeteria); use of the SLAC Guesthouse; and meetings with SLAC personnel.

Carcinogen. A material that causes the development of cancerous growth in living tissue

Chemical hazard. Hazard from chemical hazardous materials such as acids, bases, solvents, cryogens, etc.

High-efficiency particulate air (HEPA) filter. A filter capable of removing from the air at least 99.97 percent of dust, pollen, mold, bacteria and any airborne particles with a size of 0.3 micrometers or larger

Industrial hygiene (IH). The science devoted to the anticipation, recognition, evaluation, prevention, and control of those occupational factors or stresses arising in or from the workplace which may cause sickness, impaired health and well being, or significant discomfort among workers or citizens of the community

Industrial hygiene survey. Workplace survey for hazardous materials and contaminants, often including air sampling

Industrial hygienist. A professional qualified by education, training, and experience to anticipate, recognize, evaluate and develop controls for occupational health hazards and environmental issues

Hazard control ventilation. An industrial exhaust system that captures and removes contaminants emitted from local sources before dilution into ambient workplace air can occur; includes chemical fume hoods, soldering bench hoods, extractor arms, glove boxes, and biological safety hoods or cabinets

Medical surveillance. Periodic medical evaluation for personnel potentially exposed to designated chemical, biological, and physical hazards

Occupational exposure limit (OEL). An exposure limit that is the lower of the permissible exposure limit or threshold limit value (see permissible exposure limit or threshold limit value)

Permissible exposure limit (PEL). An exposure limit published and enforced by the federal Occupational Health and Safety Administration (OSHA) as a legal standard. PEL may be either a time-weighted-average (TWA) exposure limit (eight hour), a 15-minute short term exposure limit (STEL), a ceiling (C), and may have a skin designation.

Personal air sampling. The collection of air samples at the worker's breathing zone to reflect the level of a worker's exposure to a contaminant throughout a work day

Physical hazard. Hazard from physical agents such as noise, non-ionizing radiation, and magnetic fields

Threshold limit value (TLV). Recommended guidelines for occupational exposure to airborne contaminants published by the American Conference of Governmental Industrial Hygienists (ACGIH). TLVs represent the average concentration for an eight-hour workday and a 40-hour workweek to which nearly all workers may be repeatedly exposed without adverse effect.

Wipe sampling. A procedure to check for contaminants by wiping a representative surface of known area with an acceptable wipe material, which is analyzed by chemical extraction

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