Septic truck mixed biohazard test visually identification class 6 CDL endorsement tools c…
Class 6 has two divisions, and the biohazard one is 6.2. Division 6.1 is poison (the white placard with a skull). Division 6.2 is infectious substances, which uses a marking with the biohazard symbol, the three-crescent circle. So a mixed biohazard load points to 6.2, not the skull of 6.1. Whether placards are required depends on the contents.
Class 6 is two different dangers
It is easy to lump all of Class 6 together, but it holds two distinct hazards. Division 6.1 is poison: toxic solids and liquids, shown with the familiar skull and crossbones. Division 6.2 is infectious substances: materials that can cause disease, shown with the biohazard symbol. They share the class number but not the symbol or the danger.
Spotting 6.2 biohazard
Infectious substances, Division 6.2, are identified by the biohazard symbol, the recognizable circle with three interlocking crescents. This is the marking to look for on regulated medical or biological waste. It is visually different from the 6.1 skull, so the symbol itself tells you which division you are dealing with.
6.1 versus 6.2
The split within Class 6:
| Division 6.1 | Division 6.2 | |
|---|---|---|
| Hazard | Poison (toxic) | Infectious substance |
| Symbol | Skull and crossbones | Biohazard (three crescents) |
| Examples | Toxic chemicals | Regulated medical or biological waste |
| Class | Class 6 | Class 6 |
Skull means poison (6.1); biohazard means infectious (6.2). Confirm in your official manual.
Septic and mixed loads
A septic or waste truck can carry a mix, and whether the contents meet the definition of a regulated infectious substance, and therefore need 6.2 handling, depends on what is actually present. Not every waste load is a regulated hazmat. So identify the hazard by the symbol on the material, and do not assume placarding from the vehicle type alone.
How to study and verify
Drill the two Class 6 symbols side by side: skull for poison, biohazard for infectious. For real loads, whether a placard or marking is required depends on the specific material and quantity, which the regulations define. This site is a study tool, so confirm the actual requirements for any load with the official manual and the current rules.
Frequently asked questions
- What class is biohazard or infectious material?
- Division 6.2, infectious substances, within Class 6. It uses the biohazard symbol (three interlocking crescents), not the skull of poison 6.1. Confirm in your official manual.
- What is the difference between 6.1 and 6.2?
- Division 6.1 is poison (toxic solids and liquids, skull symbol); Division 6.2 is infectious substances (biohazard symbol), like regulated medical waste. Same class, different symbol and danger.
- Does a septic or waste truck always need a placard?
- Not necessarily. Whether the load is a regulated hazardous material depends on the contents and quantity. Identify by the symbol on the material and confirm requirements in the regulations.