GLOSSARY
Isolating the Scene. The process of preventing persons and equipment from becoming exposed to an actual or potential hazmat release. Includes establishing isolation perimeter and control zones.
Isolation Perimeter. The designated crowd con- trol line surrounding the Hazard Control Zones. The isolation perimeter is always the line between the general public and the Cold Zone. Law enforcement personnel may also refer to this as the outer perimeter.
J
Jet Fuel. A highly-refined kerosene petroleum distillate. There are two main grades of jet fuel used in commercial aviation—Jet A and Jet A-1. Both are kerosene distillates. Jet A is found in the U.S. and has a flash point above 100°F (38°C), Jet A-1 is a similar kerosene fuel that is used for civil commercial aviation internationally. Jet B, is a blend of kerosene and gasoline, and may be found in extremely cold climates where cold weather performance is critical (e.g., Canada).
Joint Information Center (JIC). Single location where Public Information Officers from different agencies work jointly and cooperatively to pro- vide information to the public and other external world groups.
L
Laws. Laws are primarily created through an act of Congress, by individual state legislatures, or by local government bodies. Laws typically pro- vide broad goals and objectives, mandatory dates for compliance, and established penalties for noncompliance. Federal and state laws enacted by legislative bodies usually delegate the details for implementation to a specific federal or state agency.
Leak. The uncontrolled release of a hazardous material which could pose a threat to health, safe- ty, and/or the environment.
Leak Control Compounds. Substances used for the plugging and patching of leaks in non-pres- sure containers (e.g., putty, wooden plugs, etc.).
Leak Control Devices. Tools and equipment used for the plugging and patching of leaks in non- pressure and some low-pressure containers, pipes, and tanks (e.g., patch kits, Chlorine kits, etc.).
Level I Staging. The initial location for emer- gency response units at a multiple unit response to a hazmat incident. Initial arriving emergency response units go directly to the incident scene taking standard positions (e.g., upwind, uphill as appropriate), assume command, and begin site management operations. The remaining units stage at a safe distance away from the scene until ordered into action by the Incident Commander.
Level II Staging. Used for large, complex, or lengthy hazmat operations. location where arriv- ing units are initially sent when an incident esca- lates past the capability of the initial response. Units assigned to Staging are under the control of a Staging Officer or Staging Area Manager.
Liaison Officer. Serves as a coordination point between the Incident Commander and any assisting or coordinating agencies who have responded to the incident, but who are not part of unified command or are represented at the Incident Command Post. Member of the Com- mand Staff.
Liquid Chemical Splash Protective Clothing. The garment portion of a chemical protective clothing ensemble that is designed and config- ured to protect the wearer against chemical liq- uid splashes but not against chemical vapors or gases. Liquid splash chemical protective clothing must meet the requirements of NFPA 1992. This type of protective clothing is a component of EPA Level B chemical protection.
Liquefied Natural Gas. A natural gas consisting
predominantly of methane (CH4) that has been converted temporarily to liquid form for ease of storage or transport. LNG takes up about 1/600th the volume of natural gas in the gaseous state. It is odorless, colorless, non-toxic, and non- corrosive. Hazards include flammability, freezing and asphyxia.
Liquefied Petroleum Gas. A flammable mixture of hydrocarbon gases used as a fuel in heating appliances and vehicles. Varieties of LPG bought and sold include mixes that are primarily propane, mixes that are primarily butane, and the most common, mixes including both propane (C3H8) and butane (C4H10).
Limiting Stations.A pressure relief station, pres- sure limiting station, or group of stations installed to protect a pipeline against over-pres- surization. Limiting Stations must have enough
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