HAZMAT CDL Practice Test

Moving a cargo tank with open valves or covers is permissible when it is considered empty following the criteria set by 49 CFR 173.29. This regulation outlines the conditions under which a tank that previously contained hazardous materials can be regarded as empty, particularly emphasizing that all residue that could pose a risk has been removed and that the tank cannot release vapors or residues that would cause a hazardous situation. When a cargo tank is classified as empty per these regulations, the risks associated with moving the tank are significantly minimized, making it legal to transport it under those specific circumstances. Proper adherence to these guidelines ensures safety for both the carriers and the environment, as it confirms that any possible presence of hazardous materials has been sufficiently addressed.