For the purposes of this chapter, the following terms are defined as follows:
(a) "Flammable or explosive" means materials which produce flammable or explosive vapors or gases under ordinary weather temperature, including liquids with an open cup flash point of less than 100 degrees Fahrenheit.
(b) "Free burning" means materials constituting an active fuel.
(c) "Intense burning" means materials which, by virtue of low ignition temperature, high rate of burning and large heat evolution, burn with great intensity.
(d) "Moderate burning" means materials which in themselves burn moderately and may contain small quantities of a higher grade of combustibility.
(e) "Open cup flash point" means the temperature at which a liquid sample produces sufficient vapor to flash, but not ignite, when in contact with a flame in a Tagliabue open cup tester.
(f) "Original sealed containers" means containers with a capacity of not more than fifty-five gallons.
(g) "Slow burning" means materials which will not ignite or actively support combustion during an exposure for five minutes to a temperature of 1,200 degrees Fahrenheit and which, therefore, do not constitute an active fuel.