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REHS_HAZMATS
Hazardous Materials
| Term | Definition |
|---|---|
| ABSORPTION | The substance is taken into the material (absorbed). Taking in toxic material by the absorption in the skin. |
| ACGIH | American Conference of Government Industrial Hygienists |
| ADSORPTION | The substance stays on the material (adheres). Taking in toxic material by contact with the skin. |
| ACUTE EXPOSURE | Short term, one time exposure with immediate response |
| AIR INVERSION | Temperature of the air some distance above the earth's surface is higher than the air temperature of the surface. |
| AIR REACTIVE MATERIALS | Substances that will ignite at normal temperatures when exposed to air |
| BIOHAZARD | Etiological agents. Infectious wastes |
| BIOMEDICAL HAZARD | Infectious medical waste |
| BLEVE | Boiling Liquid Expanding Vapor Explosion. A container failure with a release of energy, rapidly and violently, accompanied by a release of gas to the atmosphere, followed by ignition (fireball) and propulsion of the container or container pieces. |
| BOILING POINT | That temperature at which a subtance changes from liquid to a gas or vapor state, varying in accordance with altitude and pressure. |
| CCR | California Code of Regulations |
| CEQA | California Environmental Quality Act |
| CERCLA | Comprehensive Environmental Response, Compensation, and Liability Act of 1980 |
| CFR | Code of Federal Regulations |
| CHRONIC | Long Term Exposure |
| COLD ZONE | Where Command Post is located during emergency situation. AKA as the SUPPORT ZONE. |
| COMBUSTIBLE LIQUID | Any liquid having a flash point at or above 100 degrees F |
| COMMAND POST | The location where all the lead agencies meet and determine how to deal effectively with an incident. |
| COMPRESSED GAS | Any material or mixture which when enclosed in a container has an absolute pressure exceeding 40 psi at 70 degrees F or exceeding 140 psi at 130 degrees F |
| CONFINED SPACE | An area or space with a difficult or limited entry and exit and that does not have adequate natural ventilation. The area can become devoid of oxygen and can cause suffocation. |
| CONTROL AGENT | Any material that is used to contain or extinguish a hazardous material or its vapors |
| CORRECTIVE ACTIONS | Actions taken by the incident commander to correct the problem at hand in a hazardous materials emergency. |
| CORROSIVE MATERIAL | Any liquid or solid that can destroy human skin tissue, or a liquid that has a severe corrosion rate on steel. |
| CRYOGENIC LIQUID | Gases which must be cooled to a very low temperature to bring about a change from gas to liquid. |
| DANGEROUS CARGO MANIFEST | A cargo manifest used on ships contains a list of all the hazardous materials onboard, including their location. |
| DECONTAMINATION | A precautionary stage to clean equipment, rinse and dispose of contaminated equipment used in hazardous materials response |
| DOT | Federal Department of Transportation |
| DOWNWIND | Wind direction, wind to your face |
| EPA | Environmental Protection Agency |
| EXCLUSIONARY ZONE | HOT ZONE. Area where the incident is occuring. Zone can extend to 1500 feet or more |
| FLAMMABLE GAS | Any gas that will burn. |
| FLAMMABLE LIQUID | Any liquid having a flash point below 100 degrees F |
| FLAMMABLE MATERIAL | The temperature range when a subtance can support combustion |
| FLAMMABLE RANGE | A substance that is capable of being easily ignited and of burning rapidly |
| FLAMMABLE SOLID | Any material (other than an explosive) that can cause fire through friction, retained heat from manufacturing/processing, or that can be ignited readily and when ignited burns so vigorously and persistently as to create transportation hazard. |
| FLASHBACK | Re-ignition of flammable liquid caused by exposure of its vapors to an ignition source |
| FLASH POINT | The lowest temperature at which a liquid substance gives off flammable vapors sufficient to form an ignitable mixture with air near the surface of the liquid. Combustion is not continuous at the flash point. |
| FUSIBLE PLUGS | A safety relief device in the form of a plug of low melting metal. The plugs close the safety relief device channel under normal conditions, and are intended to yield or melt at a set temperature to permit the escape of gas. |
| GAS | A formless fluid which occupies completely the space or an enclosure |
| HOT ZONE | AKA EXCLUSIONARY ZONE. The area or perimeter where the incident is occuring. Circular perimeter can extend to 1500 feet or more from the isolation zone. |
| IDLH | Acrynom for Immediately Dangerous for Life and Health |
| *INGESTION | Swallowing or eating a substance |
| *ISOLATION ZONE | This is the area where the incident is occurring, inside the HOT ZONE |
| *LC50 | Lethal concentration were fifty percent of the tested laboratory animals die |
| *LD50 | Lethal Dose were fifty percent of the tested laboratory animals die |
| LIQUEFIED GAS | A gas that is partially liquid at a temperature of 70 degrees F |
| *LEL | Lower Explosion Level. It is the lowest concentration which can cause a substance to ignite and explode. |
| *INJECTION | Placing a substance inside and under the skin |
| MG/PER LITER | The same value as one part per million PPM |
| MSDS | Material Safety Data Sheets |
| NFPA | National Fire Protection Association |
| NIOSH | National Institute of Occupational Safety and Health |
| OSHA | Occupational Safety and Health Administration |
| OXIDIZERS | A substance that yields oxygen readily to stimulate the combustion of organic matter and inorganic matter. |
| *OXIDIZING ABILITY | The ability to yield oxygen readily to stimulate combustion |
| *PACKAGING | A broad term used by the Department of Transportation (DOT) to describe shipping containers, and any markings, labels, or placards affixed to them. |
| *PACKAGE MARKINGS | The descriptive name, instructions, cautions, weight, or specification marks required to be placed upon outside containers or hazardous materials. |
| *PLUME | General shape of spill or release |
| PPE | Personal Protective Equipment |
| PPM | Parts Per Million. Can apply to solids, liquids, and gases. |
| PEL | Permissible Exposure Limit. OSHA regulation for an 8 hour/day = 40 hour/week work exposure. |
| pH | The hydronium ion concentration of a solution. Rating is based on a 1 to 14 scale, 7 being neutral (water) |
| PHL | Public Health License |
| RCRA | Resource Conservation and Recover Act |
| SARA | Superfund Amendments and Reauthorization Act of 1986 |
| SECONDARY ZONE | WARM ZONE, contamination reduction zone. This is where crew members accessing the hot zone are decontaminated and assisted |
| SPECIFIC GRAVITY | The weight of a substance as compared to the weight of an equal volume of water (for solids and liquids) or an equal volume of air (for gases) |
| STABILIZATION | The stage of an incident when the immediate problem or emergency has been controlled, contained or extinguished. |
| STEL | Short term exposure limit |
| STAGE OF INCIDENT | One of five definite and indefiable phases through which an emergency passes from onset to stabilization |
| *SUBLIMATION | The temperature at which a substance changes from a solid to a gas or vapor state with no liquid state transition, varying in accordance with altitude and pressure |
| SUBSURFACE INJECTION | Discharge of foam or water into a storage tank from an outlet at the tank bottom or below the liquid surface |
| SUPPORT ZONE | A definition of the incident perimeter zones. The cold zone is also known as the COLD ZONE. This is the zone where the crew members wear their gear, decontaminate equipment. |
| TANK CAR | Tank vehicle on rails |
| TLV | Threshold Limit Value. A NIOSH published value. Tests by the ACGIH results in the values published by NIOSH. |
| TOXICITY | The ability of a substance to cause injury to biologic tissue |
| TSD | Treatment, Storage, and Disposal |
| TSDF | Treatment, Storage, and Disposal Facility |
| TWA | Time weighted average. A ceiling exposure limit value. The exposure amount and the duration of the exposure is calculated for this value. TWA is used when Permissible Exposure Limits or an 8 hour exposure is not applicable. |
| *UEL | Upper Explosion Level. It is the highest concentration which can cause a substance to ignite and explode. |
| UPWIND | Wind direction, wind to your back |
| VAPOR DENSITY | A concentration rating for a substance against air which has a level of equal 1. |
| VISCOSITY | The flow resistance characteristics of a liquid |
| WARM ZONE | AKA Secondary Zone |
| WATER SOLUBILITY | The factor which indicates how much a substance can interact or "mix" with water. |
| ** HAZARDOUS WASTES | No more than 220 lbs per month or 27 gallons |
| EXTREMELY HAZARDOUS WASTES | No more than 2.2 lbs per month per 2.5 gallons |
| LIQUID TRANSPORT | No more than 5 gallons per month or 50 lbs per day |
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