(1) The responsible official shall make a "threshold determination" (a decision whether or not an environmental impact statement is required) following procedures contained in WAC 197-10-300 through 197-10-340.

(2) An environmental checklist is required to be completed in the determination process except for exemptions noted in WAC 197-10-170, 197-10-175 and 197-10-180, or when it is predetermined an environmental statement is required.