A cargo tank is a type of packaging that when combined with a motor vehicle for highway transportation becomes a cargo tank motor vehicle (commonly referred to as a tanker truck). While its operation on a public roadway is the responsibility of the motor carrier, the responsibility to ensure attendance during loading or unloading of the cargo tank may be the responsibility of the motor carrier, the shipper of the HazMat, i.e., the person who offers it for transportation, a person operating the facility where transportation begins or ends, a contractor working for any one of the previous, or a third party.

The Hazardous Materials Regulations (HMR) of the Pipeline and Hazardous Materials Safety Administration within the U.S. Department of Transportation (USDOT/PHMSA) regulate the loading and unloading of a cargo tank when it is performed incidental to transportation. It is the HMR that indicates who is responsible to ensure attendance by a qualified person at all times during loading and unloading of HazMat from a cargo tank.

The purpose of this article is to identify and explain the attendance requirements of USDOT/PHMSA at 49 CFR 177.834(i) of the HMR for the loading and unloading of hazardous materials from a cargo tank. (more…)