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To identify the contents of a truck, check for:

• Placards. DOT placards on the cargo tank or trailer听indicate the substance's main hazard and may also display the UN/NA numberUnited Nations-North American number. (Also UN number or DOT number.) Four-digit number identifying an individual chemical or group of chemicals with similar characteristics. Required on shipping papers; often shown on placards. The four-digit number is often preceded by UN (such as UN1219).. Look for identical, diamond-shaped placards on the front, rear, and both sides of the cargo tank (or the trailer if the truck isn't carrying a cargo tank). Sometimes the UN/NA number is included on the placard (or on an orange panel just below it). However, note that placards may be missing, and trucks may be incorrectly placarded.
  
• Shipping papers. These papers must list and identify hazardous materials carried on the truck. Look for shipping papersDocuments used for billing, accountability, and other day-to-day activities involving the transport of hazardous materials. in the truck's cab. They could be in a pouch in the driver's door, within reach of the driver while they are driving, on the driver's seat when they are out of the vehicle, or with the driver during an emergency. Also look for the shipping papers for the hazardous materials carried on the truck. They should be marked with a tab or placed on top of other shipping papers.听On shipping papers, look for the听 UN/NA number and shipping name for each hazardous material. Below is an example of how these identifiersNames, identification numbers, and other information used to identify a chemical. might be shown on a shipping paper. The shipping papers also show each substance's hazard class or division number (shown below after听the shipping name), which indicates its hazards.
  
• Labels and tags on containers carried in a 产辞虫听迟谤补颈濒别谤. Look on each container (or on an attached label or tag) for the shipping name鈥攚hich should match the name shown on the shipping paper鈥攁nd the UN/NA number for the hazardous material it contains. Each package should also display a diamond-shaped label depicting the hazards of the enclosed material.
• Truck type. The type of truck is also a clue to its possible contents.

Once you have听found identifiers for the chemical, you can look up its datasheet in CAMEO 365bet娱乐.

• Typically carries gasoline (UN/NA 1203), diesel fuel (fuel oil), liquid fuel products, alcohol, and almost any other kind of flammableEasy to ignite and burns readily. or combustibleCan be ignited and burned. liquids. May sometimes carry nonflammableDifficult to ignite. liquids (e.g., milk or molasses). May contain mild corrosivesLiquid or solid that can destroy human skin or lung tissue or corrode metals., but not strong corrosives. Can't contain pressurized gases.
• Oval in cross-section, with blunt ends.
• Newer tanks are aluminum; older can be steel. Tank is divided into two to five compartments (usually three to four). In some cases, different products may be in different compartments; however, in most states, mixed loads are not permitted. Typical maximum capacity is 9,000 gallons. Pressure can't exceed 3 psiPounds per square inch; a unit of pressure measurement..

• Typically carries flammableEasy to ignite and burns readily. or combustibleCan be ignited and burned. liquids, acidsA substance that donates hydrogen ions that can be accepted by a base. Acids have a pH below 7., causticsStrongly basic, with high pH. Very corrosive., or poisonous liquids.
• Maximum capacity is typically up to 6,000 gallons. Pressure can be up to 40 psiPounds per square inch; a unit of pressure measurement.. Can be uninsulated or insulated:
  • Uninsulated tanks are typically circular in cross-section. Typically, there are reinforcing rings around the tank. Tanks are aluminum or steel.
  • Insulated tanks generally carry products that need to be kept either heated or cooled鈥攐r products that need to be heated to be off-loaded. They are characteristically horseshoe-shaped when viewed from behind. They are comprised of an outer jacket, generally aluminum or steel, and an inner tank that may be lined (e.g., with fiberglass).

• Typically carries strong corrosivesLiquid or solid that can destroy human skin or lung tissue or corrode metals., such as sulfuric or nitric acid. (Typically carries acidsA substance that donates hydrogen ions that can be accepted by a base. Acids have a pH below 7., but may also carry basesA substance that accepts hydrogen ions donated by an acid. Bases have a pH greater than 7..) Sometimes may carry flammableEasy to ignite and burns readily. liquids (e.g., grain alcohol), poisonous liquids, or oxidizing liquids. Can't carry pressurized gases.
• Circular in cross-section, with up to 10 reinforcing rings around the tank. May be very long. Often there is black, tar-like, corrosion-protective coating around the manhole.
• Carries a single tank, generally with a single compartment. Tank is usually of steel and lined, with capacity up to 7,000 gallons. Tank pressures between 35鈥�50 psiPounds per square inch; a unit of pressure measurement..

• Typically carries gases liquefied by pressure, such as anhydrousLiterally 'without water'. A chemical shipped or stored without water, rather than in solution, is in anhydrous form (anhydrous ammonia is a common example). ammonia, LPGLiquefied petroleum gas., propane, and butane.
• Circular in cross-section, with blunt ends: tank looks like bullet. Surface is smooth; typically painted white or silver to reduce heating by sunlight.
• Tank can carry up to 11,500 gallons; tank pressure is generally above 100 psiPounds per square inch; a unit of pressure measurement..
• Shorter "bobtail" version of MC331 tank can carry up to 3,500 gallons.
• High BLEVEBoiling Liquid Expanding Vapor Explosion. BLEVEs typically occur in closed storage tanks that contain a liquefied gas, usually a gas that has been liquefied under pressure. Although both flammable and nonflammable liquefied gases may be involved in a BLEVE, ALOHA only models flammable liquid BLEVEs. A common BLEVE scenario happens when a container of liquefied gas is heated by fire, increasing the pressure within the container until the tank ruptures and fails. When the container fails, the chemical is released in an explosion. If the chemical is above its boiling point when the container fails, some or all of the liquid will flash-boil--that is, instantaneously become a gas. If the chemical is flammable, a burning gas cloud (called a fireball) may occur if a significant amount of the chemical flash-boils. Potential BLEVE hazards include thermal radiation, overpressure, hazardous fragments, smoke, and toxic byproducts from the fire. potential.

• Typically carries gases liquefied by refrigeration, such as liquid oxygen, nitrogen, argon, carbon dioxide, and hydrogen. Product likely to be corrosiveLiquid or solid that can destroy human skin or lung tissue or corrode metals. or flammableEasy to ignite and burns readily. gas鈥攐r poisonous or oxidizing liquid. Temperature of product -150掳F or below.
• Outer shell surrounds insulated inner tank, with vacuum space between. Large compartment mounted at rear of tank. Capacity of inner tank up to 7,000 gallons.
• When sun heats tank and raises internal pressure, vaporThe gas given off by a substance that is liquid (or solid) at normal temperatures and pressures. may discharge from relief valves. Internal pressure up to 25 psiPounds per square inch; a unit of pressure measurement..
• Very high BLEVEBoiling Liquid Expanding Vapor Explosion. BLEVEs typically occur in closed storage tanks that contain a liquefied gas, usually a gas that has been liquefied under pressure. Although both flammable and nonflammable liquefied gases may be involved in a BLEVE, ALOHA only models flammable liquid BLEVEs. A common BLEVE scenario happens when a container of liquefied gas is heated by fire, increasing the pressure within the container until the tank ruptures and fails. When the container fails, the chemical is released in an explosion. If the chemical is above its boiling point when the container fails, some or all of the liquid will flash-boil--that is, instantaneously become a gas. If the chemical is flammable, a burning gas cloud (called a fireball) may occur if a significant amount of the chemical flash-boils. Potential BLEVE hazards include thermal radiation, overpressure, hazardous fragments, smoke, and toxic byproducts from the fire. potential.

• Typically carries dry bulk cargo such as calcium carbide, oxidizersOr oxidizing agent. A material that can cause or enhance the combustion of other materials, usually by providing oxygen., corrosiveLiquid or solid that can destroy human skin or lung tissue or corrode metals. solids, cement, plastic pellets, or fertilizers.
• Shape can vary, but always includes bottom hoppers.

• Typically carries pressurized gases (such as air, helium, and oxygen) in pressurized tubes.
• Pressure may be up to 5,000 psiPounds per square inch; a unit of pressure measurement..

• Typically contains mixed cargo, which may be packed in bags, boxes, drums, tanks, cylinders, or other containers. Check labels and tags on individual containers to identify their contents. See also Portable Containers Guide.
• The presence of several placard holders on the truck indicates it may commonly carry hazardous materials.