Storage vessel
Storage vessel means a tank or other vessel that is used to store organic liquids that contain one or more of the organic HAP's listed in table 2 to this subpart and that has been assigned, according to the procedures in 63.100(g), to a chemical manufacturing process unit that is subject to this subpart. Storage vessel does not include: (i) Vessels permanently attached to motor vehicles such as trucks, railcars, barges, or ships; (ii) Vessels with capacities smaller than 38 cubic meters; (iii) Except for storage vessels in ethylene oxide service, vessels storing organic liquids that contain organic hazardous air pollutants only as impurities; (iv) Bottoms receiver tanks; (v) Surge control vessels; or (vi) Wastewater storage tanks. Wastewater storage tanks are covered under the wastewater provisions.