CDL Hazardous Materials Endorsement (HME)Loading and Unloading Hazardous MaterialsMedium
A driver is transporting a bulk quantity of Class 8 (Corrosive) material in a cargo tank. What is the MINIMUM distance a qualified person must remain from the cargo tank during the loading or unloading process to ensure attendance?
- AWithin 25 feet of the cargo tank, regardless of sight.
- BWithin 50 feet of the cargo tank, regardless of sight.
- CWithin sight of the cargo tank, not more than 50 feet away.
- DWithin sight of the cargo tank, not more than 25 feet away.
Show answer & explanationAnswer & explanation
Correct answer: D. Within sight of the cargo tank, not more than 25 feet away.
For hazardous materials in cargo tanks, a qualified person must attend the loading/unloading operation. This person must remain within 25 feet of the cargo tank and within clear view of it, or within 50 feet if certain conditions (like direct communication) are met, but the 25 feet and within sight rule is the most common and stringent minimum.
Why the other options are wrong
- A. Being within 25 feet is part of the rule, but 'regardless of sight' is incorrect; the person must also be in clear view.
- B. This distance with 'regardless of sight' is too far and incorrect for direct attendance requirements.
- C. This distance is generally allowed only if direct communication is maintained and other conditions are met, but 25 feet is the primary rule for direct attendance.
Cargo Tank Loading/Unloading Attendance Distance
A qualified person attending a cargo tank during loading or unloading must remain within 25 feet of the tank and have it within their unobstructed sight.
- Attendance ensures immediate response to spills or incidents.
- Distance and visibility are critical for effective attendance.
- Specific rules apply to different materials and conditions.
Memory trick: Stay 'close' and 'watch' the tank, 'twenty-five' is the limit.