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Definitions

Chemical. Any element, chemical compound, or mixture of elements and/or compounds

Chemical asset custodian. The individual designated by an area manager as the responsible party for chemical storage assets (see chemical storage asset)

Chemical laboratory supervisor. Supervisory personnel responsible for the operations in a laboratory designated under the chemical hygiene program (see Exemptions, Chemical Exemptions)

Chemical management services (CMS). A software and material inventory management system through which chemicals are ordered, inspected, delivered, inventoried, paid for and reported (see Total Chemical Management Information System, tcmIS)

Chemical storage asset. Items used to either directly store hazardous materials or store containers of hazardous materials. These include: bulk storage tanks, tube trailers, flammable container storage cabinets, corrosive material storage cabinets, chemical refrigerators, laboratory hoods with built-in storage cabinets, other cabinets used to store lesser hazardous materials, and gas racks used to store compressed gas cylinders.

Chemical worker. Persons whose job responsibilities or tasks include the transportation, dispensing, disposal, or other handling of hazardous materials, or whose work environment provides for a reasonable probability of exposure to a hazardous material, other than those materials that meet the definition of a consumer product (see General Requirements, Chemical Hygiene Program).

Container. Any bag, barrel, bottle, box, can, cylinder, drum, reaction vessel, storage tank, or the like that contains a hazardous chemical

Control area. A building or portion of a building within which hazardous materials are allowed to be stored, dispensed, used or handled. This area is partitioned from other areas of the building through the use of a minimum of one-hour fire rated separations. A maximum of four control areas in a building is allowed.

Hazardous material. Any chemical or material that, due to its physical or chemical properties, poses a risk to the health or safety of humans, environment, or the physical plant

Hazardous waste. Any hazardous material not appropriate for further use which meets the legal definition of a hazardous waste

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.

Label. Any written, printed, or graphic material displayed on or affixed to containers of hazardous material

Laboratory scale. Work with substances in which the containers used for reactions, transfers, and other handling of substances is designed to be easily and safety manipulated by one person

Material safety data sheet (MSDS). A document produced by chemical manufacturers and importers to relay chemical, physical and hazard information about specific substances

Occupancy classification. The purpose for which a building or part thereof is used or intended to be used. There are seven main occupancy classifications that may be present at SLAC: Group A (assembly), Group B (office, professional or service-type occupancies which are not classified as Group H occupancies), Group F (factory and/or industrial occupancies that are not classified as Group H occupancies), Group H (hazardous operations occupancies with high fire, explosion or health hazard), Group R (residential and hotel occupancies), Group S (storage and warehousing occupancies that are not classified as Group H occupancies), and Group U (includes garages, carports, sheds and agricultural buildings).

Permissible exposure limit (PEL). The maximum amount or concentration of a chemical that a worker may be exposed to under OSHA regulations

Tank. Container larger than 60 gallons (227 liters)

Total Chemical Management Information System (tcmIS). The trademarked name of the chemical information system provided by the SLAC CMS vendor, Haas TCM (see chemical management services)

Threshold limit value (TLV). The American Conference of Governmental Industrial Hygienist (ACGIH) level of exposure that a typical worker can experience without an unreasonable risk of disease or injury

Threshold quantity (TQ). Term used with regards to the OSHA Process Safety Management (PSM) Standard and the California Accidental Release Program (CalARP). OSHA PSM TQs are listed in 29 CFR 1910.119, Appendix A; CalARP TQs in 19 CCR 2770.5.