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, 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.

Source

40 CFR § 63.101

Scoping language

The following terms as used in subparts F, G, and H of this part shall have the meaning given them in subpart A of this part: Act, actual emissions, Administrator, affected source, approved permit program, commenced, compliance date, construction, continuous monitoring system, continuous parameter monitoring system, effective date, emission standard, emissions averaging, EPA, equivalent emission limitation, existing source, Federally enforceable, fixed capital cost, hazardous air pollutant, lesser quantity, major source, malfunction, new source, owner or operator, performance evaluation, performance test, permit program, permitting authority, reconstruction, relevant standard, responsible official, run, standard conditions, State, and stationary source.