A driver is transporting a shipment that includes UN1210, Printing ink (Class 3, PG II), and UN1791, Hypochlorite solution (Class 8, PG III). Which of the following statements regarding segregation is TRUE?
- AThese materials must be segregated because hypochlorite solution is an oxidizer.
- BThese materials do not require segregation from each other.
- CThese materials must be segregated because Class 3 (flammable liquid) and Class 8 (corrosive) are incompatible.
- DSegregation is only required if the combined weight exceeds 1,001 pounds.
Show answer & explanationAnswer & explanation
Correct answer: C. These materials must be segregated because Class 3 (flammable liquid) and Class 8 (corrosive) are incompatible.
According to the hazardous materials segregation table (49 CFR 177.848), Class 3 (Flammable Liquids) and Class 8 (Corrosive Materials) are incompatible and must be segregated from each other. The table shows an 'X' at the intersection of these two classes, indicating that segregation is required. While hypochlorite solutions can be oxidizers, the primary hazard class given is Class 8, and the direct incompatibility between Class 3 and Class 8 is the primary reason for segregation here.
Why the other options are wrong
- A. While some hypochlorite solutions can have oxidizing properties, the primary reason for segregation here is the direct incompatibility between Class 3 and Class 8, as indicated in the segregation table.
- B. Class 3 and Class 8 are indeed incompatible and require segregation.
- D. Segregation rules are based on incompatibility, not directly on the 1,001-pound placarding threshold. Incompatible materials must be segregated regardless of their total weight.
Segregation of Flammable Liquids and Corrosives
Flammable liquids (Class 3) and corrosive materials (Class 8) are incompatible hazardous materials and must be segregated from each other during transport to prevent dangerous reactions.
- Class 3 (Flammable Liquids) are highly reactive.
- Class 8 (Corrosive Materials) can cause damage to other materials.
- Segregation prevents fires, explosions, or release of toxic fumes.
- The HazMat Segregation Table (49 CFR 177.848) explicitly mandates this segregation.
Memory trick: Flammable and Corrosive: Keep them apart, or it's a messy start.