AHMM flashcards
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32 cards. Read the term and the definition here. The deck at the top of this page is optional.
- Hazardous Materials Table
- The 49 CFR 172.101 listing that assigns each regulated material its proper shipping name, hazard class, UN/NA number, packing group, label codes, and special provisions for transport.
- Proper shipping name
- The name in the Hazardous Materials Table that must appear on shipping papers and packages, using the exact wording and any italicized or bolded qualifiers the table specifies.
- Packing group
- A DOT ranking of hazard degree for certain classes: PG I great danger, PG II moderate danger, PG III minor danger, used to select packaging performance levels.
- Flash point
- The lowest temperature at which a liquid releases enough vapor to form an ignitable mixture with air near its surface, measured by closed-cup or open-cup test methods.
- Flammable liquid threshold
- Under DOT and NFPA conventions a liquid with a flash point at or below 60 C (140 F) is flammable; above that it is combustible.
- Autoignition temperature
- The minimum temperature at which a material ignites spontaneously in air without an external ignition source; heating a material to this point can cause ignition without a spark.
- Lower flammable limit
- The minimum vapor concentration in air below which a flame will not propagate; below the LFL the mixture is too lean to burn.
- Upper flammable limit
- The maximum vapor concentration in air above which a flame will not propagate; above the UFL the mixture is too rich to burn but may become flammable on dilution.
- NFPA 704 diamond
- A placard using blue for health, red for flammability, yellow for instability, and white for special hazards, each rated from 0 minimal to 4 severe.
- Hazardous waste characteristics
- The four EPA RCRA traits that make a solid waste hazardous: ignitability, corrosivity, reactivity, and toxicity as determined by specified test procedures.
- Corrosivity characteristic
- A RCRA trait for aqueous waste with pH at or below 2 or at or above 12.5, or that corrodes steel faster than 6.35 mm per year.
- Ignitability characteristic
- A RCRA trait covering liquids with flash point below 60 C, non-liquids that ignite under specified conditions, ignitable compressed gases, and oxidizers.
- Reactivity characteristic
- A RCRA trait for waste that is unstable, reacts violently with water, forms explosive mixtures, or generates toxic gases when mixed or heated.
- TCLP
- The Toxicity Characteristic Leaching Procedure, a test that simulates landfill leaching to determine whether a waste exceeds regulatory concentration limits for toxic metals and organics.
- Large quantity generator
- A RCRA generator producing 1,000 kg or more of hazardous waste per month, subject to the strictest accumulation, inspection, training, and contingency planning requirements.
- Small quantity generator
- A RCRA generator producing between 100 and 1,000 kg of hazardous waste per month, with reduced requirements and limited on-site accumulation time.
- Hazardous waste manifest
- The tracking document accompanying hazardous waste from generator to transporter to treatment facility, requiring a signed return copy within 30 days of receipt.
- Cradle-to-grave liability
- The RCRA principle that a generator remains responsible for its hazardous waste from the point of generation through final disposal, even after transfer.
- HAZWOPER awareness level
- The first responder level where personnel recognize a hazardous substance release, notify appropriate authorities, and secure the area without attempting control or exposure.
- HAZWOPER operations level
- Responders who take defensive action to contain a release from a safe distance, prevent spread, and protect exposures without entering the hot zone offensively.
- HAZWOPER technician level
- Responders trained to take offensive action to stop a release, including donning chemical protective clothing and entering the hot zone using incident command.
- IDLH
- Immediately dangerous to life or health: the maximum concentration from which a worker can escape within 30 minutes without irreversible health effects or escape-impairing symptoms.
- Permissible exposure limit
- The OSHA-enforceable airborne concentration limit, usually expressed as an 8-hour time-weighted average, that a worker may be exposed to over a work shift.
- Time-weighted average
- An exposure metric computed by multiplying each concentration by its exposure duration, summing the products, and dividing by the total sampling period.
- Placard threshold
- The general rule that placards are required when 1,001 lb (454 kg) or more aggregate gross weight of a hazard class is loaded, subject to class-specific exceptions.
- Shipping paper basic description
- The required sequence on a shipping document: proper shipping name, hazard class or division, UN/NA identification number, and packing group, plus quantity and package count.
- Segregation table
- The 49 CFR 177.848 matrix that identifies which hazard classes may not be loaded or stored together in the same transport vehicle.
- Oxidizer
- A material that yields oxygen or otherwise promotes combustion of other materials, which can intensify a fire and require different extinguishing agents.
- Water-reactive material
- A substance that reacts with water to release flammable or toxic gas or heat, so water must never be used as an extinguishing agent.
- Incompatible materials
- Substances that on contact may react violently, generate heat, ignite, or produce toxic gas, requiring separate storage and handling.
- Control zones
- The hot, warm, and cold zone boundaries at a hazmat incident that limit access by contamination level and define decontamination corridors.
- Decontamination
- The process of removing hazardous contaminants from responders, equipment, and victims, typically proceeding from gross removal through washing before exiting the hot zone.