Transfer rack
Transfer rack means the collection of loading arms and loading hoses, at a single loading rack, that are assigned to a chemical manufacturing process unit subject to this subpart according to the procedures specified in 63.100(h) and are used to fill tank trucks and/or railcars with organic liquids that contain one or more of the organic hazardous air pollutants listed in table 2 to this subpart. Transfer rack includes the associated pumps, meters, shutoff valves, relief valves, and other piping and valves. Transfer rack does not include: (i) Racks, arms, or hoses that only transfer liquids containing organic hazardous air pollutants as impurities; or (ii) Racks, arms, or hoses that vapor balance during all loading operations.