N.H. Code Admin. R. Saf-C 4802.08
“Gallon” means a liquid measure that is not corrected for temperature and that contains 231 cubic inches or the equivalent of 4 ¼ pounds of propane or 100 cubic feet of natural gas. The term includes “gross gallons”.
Source. #10022, eff 11-9-11; ss by #13039, eff 4-20-20 (formerly Saf-C 4802.07)