Combustible Dust was not included in Table 5003.1.1(1) because of the inherent difficulty in establishing a maximum allowable quantity (MAQ) and determining if and when the MAQ had been exceeded. An occupancy with an uncontrolled combustible dust hazard is classified in Group H-2 in accordance with Section 307.4 of the International Building Code (IBC), with the exception of certain woodworking uses classified as Group F-1.