Threshold Limit Value/ Time Weighted Average
Maximum airborne concentration maybe exposed to 8hrs a day 40hrs a week.
Permissible Exposure Limit
An OSHA term for the maximum concentration averaged over 8 hours, to which 95 percent of healthy adults can be repeatedly exposed for 8 hours per day, 40 hours per week.
Short Term Exposure Limit
STEL; legal limits established by OSHA to which workers can be exposed continuously for a short period of time without damage or injury; exposures at the STEL should not be for more than 15 minutes and not repeated more than four times per work day.
Threshold Limit Value/ Ceiling
This is the maximum concentration to which a health adult can be exposed without risk of injury, and the exposure to higher concentrations should not occur
Threshold Limit Value Skin
Indicates the concentration at which direct exposure or airborne contact with a material could result in possible and significant exposure by absorption through the skin, mucous membranes, and eyes.
Emergency Response Planning Guidelines ERPG-2
The maximum airborne concentration which is believed all individuals could be exposed for one hour.
Acute Emergency Exposure Guidelines
Cover five exposure periods, 10 min, 30 min, 1 hr, 4hr, 8 hrs
LD50
A chemical dose lethal to 50 percent of a test population
Lethal Concentration
Concentration of an inhaled substance that results in the death of a certain percentage of the test population; the lower the value the more toxic the substance; an inhalation exposure expressed in parts per million (ppm), milligrams per liter (mg/liter),
Curie
a unit of radioactivity equal to the amount of a radioactive isotope that decays at the rate of 37,000,000,000 disintegrations per second
Roetgen
unit used to measure nuclear radiation; it is equal to the amount of radiation that produces 2x10^9 ion pairs when it passes through 1 cm^3 of dray air
rem
(Roentgen Equivalent Man) the dosage of ionizing radiation that will cause the same amount of injury to human tissue as 1 roentgen of X-rays
RAD
Radiation absorbed dose
Incident Safety Officer
The command staff position assigned to monitor the scene for safety hazards or unsafe operations, enforce safety practices, and establish a safety plan.
Flammability
IDLH action is 10% of the lower explosive limit.
Non bulk packaged bags
Can be stiched, folded and glued, carry fertilizers, caustic powders, pesticides.
Carboys
Class 6,8
Up to 20 gal
Nonbulk to transport corrisive liquid
Bulk 1 ton containers
2 valves, 1 liquid 1 vapor
Supersacks
IBC, solid materials, miscllenous 500 to 5000 lbs
Rigid Containers
IBC 300 to 500 gal polyethylene tank inside a rigid steel frame
Pressure Tank Containers
4500 to 5500 intermodal with pressure capacity of 100 to 500 psi
Specialized tank tube modules
pressure ranges up 2400 psi or higher
MC306 DOT406
Low pressure cargo tank car, gasoline
MC307 DOT407
Low pressure chemical cargo
MC312 doT 412
Corrosive cargo tank
mc330
High pressure cargo tank truck
mc338
Cryogenic Liquid Cargo
markers on a pipeline
Pipeline content, operator, emer. Telephone
Placard 1
Explosives
Placard 2
Gas
Placard 3
Liquid
Placard 4
Flammable Solid
PLACARD 5
Oxidizer
Placard 6
Toxic and Infectious Substance
Placard 7
Radioactive
Placard 8
Corrosive Substances
Placard 9
Miscellaneous
Bill of lading
Highway
Waybill
Railroad
Marine
Dangerous goods manifest
Air
Airbill
Military Division 1
Mass detonation
Military Division 2
Explosion with fragment hazard
Military Division 3
Mass Fire Hazard
Military Division 4
Moderate Fire Hazard
Military Red Suit
Highly Toxic Chemical Agent
Military Yellow Suit
Harassing Agent
Military White Suit
White Phosphorus...
Cryogenic liquid
Liquids stored below -90C
Ionic Bonding
The electrostatic attraction between oppositely charged particles
Covalent Bonding
Force holding together elements that share an electron
Sublimation
The ability of a substance to change from the solid to the vapor phase without becoming a liquid
Miscibility
The ability of materials to dissolve into a uniform mixture
Vesicants
Blister agents, mustard gas
MSST maximum safe storage temperature
Maximum temp an organic peroxide can be maintained
CAMEO
Computer Assisted Management of Emergency Operations
MARPLOT
Mapping Applications for Response, Planning, and Local Operation
ALOHA
Aerial Locations of Hazardous Atmosphere Plooms
Chemical Test Strips
chlorine, PH, sulfides, oxidizers, flourides, nerve agents, cyanide, and arsenic
Runaway Cracking
Also known as a BLEVE
Score
Reduction in Thickness
Degradation
physical destruction or decomposition of a clothing material due to exposure to chemical
Penetration
flow of a hazardous chemical through closures seams, pinholes or other imperfections
Permeation
hazardous substance moves through a given material on the molecular level
Dilution
1) is not water reactive, 2) will not generate a toxic gas upon contact with water, 3) will not form any kind of solid or precipitate, 4) is totally water soluable