The rule is being changed to add an affirmative requirement that sources keep compliance records for a period of two years. Other changes to the rule include: 1) language that was added to Section R307-309-3 to emphasize that the rule applies to fugitive dust sources one-quarter acre or greater; 2) a clarification on the method for observing fugitive emissions that allows people to observe emissions at varying lengths of duration, not just six minutes; and 3) an explicit statement that fugitive dust plans are still required for the activities mentioned in Sections R307-309-7 through R307-309-11. These numbered changes mainly add clarity to the rule, and they do not change the way that the Division of Air Quality has previously interpreted those sections.