Storage vessel

Storage vessel means a tank or other vessel used to store liquids that contain one or more HAP. Storage vessels do not include the following:
(1) Vessels permanently attached to motor vehicles such as trucks, railcars, barges, or ships;
(2) Pressure vessels designed to operate in excess of 204.9 kilopascals (30 pounds per square inch) and without emissions to the atmosphere;
(3) Vessels with capacities smaller than 38 cubic meters (10,000 gallons);
(4) Vessels and equipment storing and/or handling material that contains no HAP or contains HAP as impurities only;
(5) Bottoms receiver tanks;
(6) Surge control vessels;
(7) Wastewater storage vessels; and
(8) Storage vessels assigned to another process unit regulated under another subpart of part 63.

Source

40 CFR § 63.5610


Scoping language

For all affected sources complying with the batch process vent testing provisions in 63.490(c) and the operating limit provisions in 63.505(c), the terms used in this subpart and in subpart U of this part are defined in 63.482 and paragraph (g) of this section.

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