In light liquid service
In light liquid service means that a piece of equipment in regulated material service contains a liquid that meets the following conditions:
(1) The vapor pressure of one or more of the compounds is greater than 0.3 kilopascals at 20 °C;
(2) The total concentration of the pure compounds constituents having a vapor pressure greater than 0.3 kilopascals at 20 °C is equal to or greater than 20 percent by weight of the total process stream; and
(3) The fluid is a liquid at operating conditions.
Source
40 CFR § 82.3
Scoping language
As used in this subpart, the term: