Glossary

A technique used to identify conceivable failures affecting system performance, human safety or other required characteristics.

Method to identify potential hazard within critical risk areas of a project.

A method used to perform risk assessment and risk mitigation. Each unit operation is evaluated to define what critical parameters must be kept within specified ranges, and the process control strategy is designed to monitor and control within that range.

The process of systematically reviewing a facility, system, or process to determine potential safety concerns.

HAZOP is a structured and systematic examination of a planned or existing process or operation in order to identify and evaluate problems that may represent risks to personnel or equipment, or prevent efficient operation.

(DOD) The aggregate probability of occurrence of the individual events that create a specific hazard.

(DOD) An assessment of the consequence of the worst credible mishap that could be caused by a specific hazard.

Areas that may contain hazardous (classified) materials in sufficient quantities to create an explosion. (For definitions and classifications see the National Electric Code, Article 500, and ANSI/NFPA 497M, Classification of Gases, Vapors, and Dust for Electrical Equipment in Hazardous (Classified) Locations).

Gases, vapors, combustible dusts, fibers, or flyings that are explosive under certain conditions.

A reaction which generates pressure or byproducts which could cause injury, illness or harm to humans, domestic animals, livestock or wildlife.

Group H occupancies include buildings or structures, or portions thereof, that involve the manufacturing, processing, generation or storage of materials that constitute a high fire, explosion, or health hazard. There are eight divisions in this Group:1.Division 1 – Occupancies with a quantity of material in the building exceeding regulation set limits and that present a high explosion hazard, such as blasting agents, fireworks, black powder, certain oxidizers and detonatable unstable (reactive) materials, and other materials (refer to Code for more details).2.Division 2 – Occupancies where combustible dust is manufactured, used, or generated in such a manner that concentrations and conditions creates fire or explosion potential, or occupancies where materials exceeding regulation set limits present a moderate explosion hazard or a hazard from accelerated burning, such as some organic peroxides, pyrophoric gases, flammable or oxidizing gases, some nondetonatable unstable (reactive) materials, and other materials (refer to Code for more details).3.Division 3 – Occupancies where flammable solids, other than combustible dust, are manufactured, used or generated, or occupancies where materials exceeding regulation set limits present a high physical hazard, such as some organic peroxides and oxidizers, pyrophoric liquids or solids, flammable solids in storage, flammable or oxidizing cryogenic fluids, and other materials (refer to Code for more details).4.Division 4 – Repair garages not classified as Group S, Division 3 Occupancies.5.Division 5 – Aircraft repair hangars not classified as Group S, Division 5 Occupancies, and heliports.6.Division 6 – Semiconductor fabrication facilities and comparable research and development areas in which hazardous production materials (HPM) are used and the aggregate quantity of materials exceeds those set by regulations. Such facilities and areas shall be designed and constructed following a different set of regulations.7.Division 7 – Occupancies having quantities of materials in excess of those set by regulations, and that are health hazards, such as corrosives (except stationary lead-acid battery systems), toxic and highly toxic materials, irritants, sensitizers, and other health hazards (refer to Code).8.Division 8 – Laboratories and similar areas used for scientific experimentation or research having quantities of materials not in excess of those set by regulations, and not otherwise classified as Group B, Division 2 Occupancies (refer to Code for more details).

A substance which by reason of being explosive, flammable, toxic, poisonous, corrosive, oxidizing, irritant or otherwise harmful, is likely to cause injury.

Waste that poses substantial or potential threats to public health or the environment, e.g., waste fulfilling CRIT (corrosive, reactive, ignitable, toxic) criteria.

Hazards of Construction Risk Assessment

The abnormal appearance of a localized diminishing in brightness or luster of a surface when compared to the adjacent surfaces.

Hazard and Operability Study Review

Hazardous Waste Operations and Emergency Response (OSHA)

Hemoglobin-Based Oxygen Carrier

Hydrocarbon

Health Canada

Department of Housing and Community Development (California)

Hydrochlorofluorocarbon

Host Cell Protein

High Containment Transfer

Highly Crosslinked Themoplastic Vulcanizate