Equipment used to conduct the emissions test shall be: Designed to meet the equipment specifications provided in SAE J1667; Approved by the Maryland Department of the Environment; and Maintained in accordance with manufacturer's specifications. Maintenance records for emissions test equipment shall be maintained for a period of 4 years from the date of issue and shall include: The dates of calibration; The full legal name of the individual who calibrated the emissions test equipment; and Any receipts for parts and repairs needed to maintain the emissions test equipment.