Hazmat vs Placarding??

Hazmat vs Placarding??

Let’s identify how the Department of Transportation (DOT) defines hazardous materials, or Hazmat.

DOT defines a hazardous material as any item or chemical that, when being transported or moved in commerce, is a risk to public safety or the environment and is regulated as such under its Pipeline and Hazardous Materials Safety Administration regulations (49 CFR 100–199).

Any item or chemical that is a risk to public safety or the environment pretty well sums up what a hazard could potentially be. In the world of D.O.T., they break down any item or chemical into nine different categories or hazard classes.

9 Different Categories or Hazard Classes

1. Explosives
2. Gases 
3. Flammable and combustible liquids
4. Flammable Solids
5. Oxidizing Substances, Organic Peroxides
6. Toxic substances and infectious substances
7. Radioactive Materials
8. Corrosives
9. Miscellaneous Hazardous Materials

After looking at this list of hazard classes, questions can potentially arise about what types of materials would fit some of these categories. Some common questions that come from various transporters are related to flammable solids and items that could be considered under the Miscellaneous Hazardous Materials

1. Explosives
2. Gases 
3. Flammable and combustible liquids
4. Flammable Solids
5. Oxidizing Substances, Organic Peroxides
6. Toxic substances and infectious substances
7. Radioactive Materials
8. Corrosives
9. Miscellaneous Hazardous Materials

After looking at this list of hazard classes, questions can potentially arise about what types of materials would fit some of these categories. Some common questions that come from various transporters are related to flammable solids and items that could be considered under the Miscellaneous Hazardous Materials

1. Explosives
2. Gases 
3. Flammable and combustible liquids
4. Flammable Solids
5. Oxidizing Substances, Organic Peroxides
6. Toxic substances and infectious substances
7. Radioactive Materials
8. Corrosives
9. Miscellaneous Hazardous Materials

After looking at this list of hazard classes, questions can potentially arise about what types of materials would fit some of these categories. Some common questions that come from various transporters are related to flammable solids and items that could be considered under the Miscellaneous Hazardous Materials

An Example of Flammable Solids Would Be Defined By DOT As Follows:

1. Solids that may cause a fire through friction, such as matches,.
2. Pyrophoric (literally, “fire-loving”) materials are those that can ignite with no external ignition source within five minutes after coming into contact with air.
3. Self-heating materials are those that exhibit spontaneous ignition or heat themselves to a temperature of 200 °C (392 °F) during a 24-hour test period. (This behavior is called spontaneous combustion.)

Dangerous when wet materials are those that react with water to become spontaneously flammable or to give off flammable gas or toxic gas at a rate greater than 1 liter per kilogram of the material per hour.

One flammable solid that always comes to mind is magnesium, which, if in the right conditions, like getting wet with water, can cause all kinds of fireworks.

Class 9 Hazmat includes:

Class 9 hazardous materials are miscellaneous hazardous materials. That is, they are materials that present a hazard during transportation, but they do not meet the definition of any other hazard class.

• Materials transported by air that could cause extreme annoyance to a flight crew member to the extent that it prevents the crew from performing its duties;
• Hazardous wastes;
• Hazardous substances;
• Marine pollutants; and
• Materials that meet the definition in the hazardous materials regulations (HMRs) for an elevated temperature material.

When transporting various hazardous waste streams from their generators to the final disposal, class 9 was often used for items such as ethylene glycol (spent automotive antifreeze).

Now that we have completely dumped a ton of information regarding what a hazardous material is, another frequently asked question that we receive is what all hazardous materials or waste needs to have placards, how often should we use them, and how many do I need to put on my loads. The DOT offers some basic regulations regarding placarding. 

When the aggregate gross weight of all hazardous materials in non-bulk packages covered in Table 2 is less than 454 kg (1,001 lbs), no placard is required on a transport vehicle or freight container when transported by highway or rail [§172.504(c)].

Non-bulk packages are considered to be portable containers like drums, totes, boxes, crates, etc. A bulk package would be complete tankers, rail tanks, or vessels. The general rule for differences between bulk and non-bulk containers is that bulk containers are built into the unit transporting them, whereas non-bulk containers can be moved from unit to unit by hand, lift trucks, or cranes.

Identification Number Markings on Orange Panels or Appropriate Placards Must Be Displayed On:

1. Tank cars, cargo tanks, portable tanks, and other bulk packaging’s.
2. Transport vehicles or freight containers containing 4,000 kg (8,820 lbs) in non-bulk packages of only a single hazardous material having the same proper shipping name and identification number loaded at one facility, and transport vehicles that contain no other material, hazardous or otherwise.
3. Transport vehicles or freight containers containing 1,000 kg (2,205 lbs) of non-bulk packages of materials poisonous by inhalation in Hazard Zone A or B. See §§172.301(a)(3), 172.313(c), 172.326, 172.328, 172.330, and 172.331.

To clarify, anything meeting this large shipment requirement not only requires the placard but also an identification number. Like this example, if I were transporting drums of hydrochloride acid, I would just need to placard my load and label each container with the Corrosive Class 8 Placard and label. But if I were transporting a major cargo tank full of hydrochloride acid, I would need to use the Corrosive Class 8 placard and label it with a 1789 ID number.

When placarding a transport truck, bus, trailer, or tanker, placards need to be visible on all four sides of the unit, and placards need to be at least 9.84 on all sides. Sticker labels need to be at least 3.9” on all sides. 

Again, we just touched on a few basic items regarding hazards and placarding, but we are excited to give any guidance regarding the placarding of hazardous materials.

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