As used in this chapter, “industrial gas” means any substance which is in a gaseous state at ambient conditions of temperature and pressure used for commercial, industrial, or scientific purposes, but does not include any gaseous hydrocarbon used for light, heat, power, or feedstock.
Source:
Section 6201.3, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=PUC§ionNum=6201.3..