提供了一个行业标准，用于在由多个供应商运营的码头对适当和租用的运输公司DOT MC306罐车进行底部装载和蒸汽回收。指导罐车制造商和操作员，了解应提供的统一特征，以允许使用标准4英寸适配器装载罐车。该版本的RP 1004需要一个独立的二次控制系统，并对储罐内的大修提出最高要求，以允许二次控制系统正常工作。

Provides an industry standard for bottom loading and vapor recovery of propriety and hired carrier DOT MC306 tank vehicles at terminals operated by more than one supplier. Guides the manufacturer and operator of a tank vehicle as to the uniform features that should be provided to permit loading of a tank vehicle with a standard 4-inch adapter. This edition of RP 1004 requires an independent secondary control system and maximum requirements for outage in the tank to allow the secondary control system to function.