In this subchapter:
(1) "Ammonium nitrate" means ammonium salt of nitric acid that contains more than 33 percent nitrogen, one-half of which is the 50 ammonium form and one-half of which is the nitrate form.
(2) "Ammonium nitrate material" means solid fertilizer that includes ammonium nitrate as a component, if the fertilizer's nitrogen content derived from the ammonium nitrate is at least 28 percent of the fertilizer by weight.
(3) "Ammonium nitrate storage facility" means a facility that stores ammonium nitrate material or ammonium nitrate to be used in ammonium nitrate material and includes the premises on which a facility is located.
(4) "Fire marshal" means the state fire marshal or a local fire marshal, fire chief, or volunteer fire chief having jurisdiction over the area in which an ammonium nitrate storage facility is located.
(5) "Operator" means the person who controls the day-to-day operations of an ammonium nitrate storage facility.