(C) If the potential to emit of an air contaminant source exceeds ten pounds per day of any type of air contaminant, the exemption provided in this section does not apply unless the owner or operator of the source maintains records that are adequate to demonstrate that actual emissions have not exceeded ten pounds per day. If the source emits hazardous air pollutants, the exemption provided in this section does not apply unless the owner or operator of the source maintains records that are adequate to demonstrate that actual emissions of hazardous air pollutants have not exceeded one ton per year. Records required under this division shall be maintained on and after October 29, 1993, preserved for a period of two years, and made available upon request to the director. The director may adopt, amend, and rescind rules to provide further specificity with regard to recordkeeping requirements under this division.