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2707.9.1 Operation of Cargo Tanks
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The operator of a cargo tank shall not remain in the vehicle during loading or unloading of the cargo and shall personally supervise such operation from a location at which the operator may observe the vehicle, the delivery and vapor recovery hoses, the fill connection and any overfilling of the tank.
All appropriate actions shall be taken to prevent vehicle movement during the loading and unloading of the cargo, including setting the parking brake and chocking of tires.
During the loading of cargo tanks with openable domes, the domes shall be secured on all but the receiving compartment, except that during loading of gasoline, all domes shall be secured.
It shall be unlawful for the operator of a cargo tank to smoke in and within 25 feet (7620 mm) of the vehicle while transporting, loading or unloading cargo or to allow others to do so.
Flammable and combustible liquids shall be transferred to tanks by means of approved liquid- and vapor-tight connections between the delivery hose and fill tank connection. Where underground tanks are equipped with a vapor recovery system, all connections required for the safe and proper functioning of the vapor recovery system shall be made and maintained liquid- and vapor-tight throughout the unloading process. Vapors shall not be discharged at grade level during delivery.
In making any delivery of flammable or combustible liquid the operator of the cargo tank shall ensure, prior to unloading, that all hoses utilized for liquid delivery and vapor recovery are protected from physical damage, including damage by motor vehicles. Such protection shall be provided by positioning the cargo tank to prevent motor vehicles from passing through the area or areas occupied by hoses, or by other approved equivalent means.