230
GLOSSARY
2) Identifying damaged equipment requiring replacement or repair.
3) Identify equipment or supplies requiring spe- cialized decontamination or disposal.
4) Identify unsafe work conditions.
5) Assign information-gathering responsibilities for a post-incident analysis.
Decon. Popular abbreviation referring to the process of decontamination.
Decontamination. The physical and/or chemical process of reducing and preventing the spread of contamination from persons and equipment used at a hazardous materials incident. OSHA 1910.120 defines decontamination as the removal of hazardous substances from employees and their equipment to the extent necessary to pre- clude foreseeable health effects.
Decontamination Corridor.A distinct area with- in the Warm Zone that functions as a protective buffer and bridge between the Hot Zone and the Cold Zone, where decontamination stations and personnel are located to conduct decontamina- tion procedures. An incident may have multiple decontamination corridors, depending upon the scope and nature of the incident.
Defensive Tactics. These are less aggressive spill and fire control tactics where certain areas may be "conceded" to the emergency, with response efforts directed towards limiting the overall size or spread of the problem. Examples include iso- lating the pipeline by closing remote valves, shutting down pumps, constructing dikes, and exposure protection.
Degree of Solubility. An indication of the solu- bility and/or miscibility of the material.
Negligible—less than 0.1 percent Slight—0.1 to 1.0 percent Moderate—1 to 10 percent Appreciable—greater than 10 percent Complete—soluble at all proportions.
Department of Energy (DOE). U.S. government agency with the overarching mission to advance the national, economic, and energy security of the United States; to promote scientific and tech- nological innovation in support of that mission; and to ensure the environmental cleanup of the national nuclear weapons complex.
.http:/f/
www.energy.gov/index.htm
Department of Homeland Security (DHS). U.S. government agency with a mission to secure the nation from the many threats it faces. DHS’ mis- sion gives it five main areas of responsibility: guarding against terrorism, securing U.S. bor- ders, enforcing immigration laws, improving readiness for, response to, and recovery from disasters, and maturing and unifying the depart- ment.
http://www.dhs.gov/index.shtm
Department of Labor (DOL). U.S. government agency that fosters and promotes the welfare of the job seekers, wage earners, and retirees of the United States by improving their working condi- tions, advancing their opportunities for prof- itable employment, protecting their retirement and health care benefits, helping employers find workers, strengthening free collective bargain- ing, and tracking changes in employment, prices, and other national economic measurements. In carrying out this mission, the Department administers a variety of federal labor laws including those that guarantee workers’ rights to safe and healthful working conditions; a mini- mum hourly wage and overtime pay; freedom from employment discrimination; unemploy- ment insurance; and other income support.
http://www.dol.gov/
Department of Transportation (DOT). Federal agency responsible for enacting regulations and standards governing the design, construction and operation of interstate pipeline systems. (The Office of Pipeline Safety (OPS) is the specific agency within DOT assigned this responsibility.)
Depleted Gas Reservoirs. Underground reser- voirs from which some or all of the recoverable natural gas has already been extracted, leaving an underground formation that has been proven to be geologically capable of holding natural gas. It is the most common form of underground stor- age for natural gas.
Dig Safely Program. Nationwide damage pre- vention campaign originally developed by DOT to raise public awareness of the One Call System and provide guidance on safe digging practices, including accurately locating and marking pipelines and other underground infrastructures.
Dike. A defensive confinement procedure con- sisting of an embankment or ridge on ground used to control the movement of liquids, sludges,
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