The following emission units and activities need not be included in the permit application, except to the extent required by COMAR 26.11.03.02G: Space heaters operating by direct heat transfer and used solely for comfort heat; Brazing, soldering, welding equipment and cutting torches related to manufacturing and construction activities that emit HAP metals and not directly related to plant maintenance upkeep and repair or maintenance shop activities; Lubricating oil storage tanks; Unheated storage tanks containing VOC with an initial boiling point of 300°F (149°C) or greater; Storage tanks containing Numbers 1, 2, 4, 5, and 6 fuel oil and aviation jet engine fuel; First aid and emergency medical care provided at the facility, including related activities such as sterilization and medicine preparation used in support of a manufacturing or production process; Certain recreational equipment and activities, such as fireplaces, barbecue pits and cookers, fireworks displays, and kerosene fuel use; Potable water treatment equipment, not including air stripping equipment; Noncontact water (i.e., water that has not been in direct contact with process fluids) cooling towers except as regulated under §112 of the Clean Air Act; Firing and testing of military weapons and explosives; Emission resulting from the use of explosives for blasting at quarrying operations and from the required disposal of boxes used to ship the explosive; All sources listed in COMAR 26.11.02.10 except §§A, B, F, J, N, O(1), O(5), O(11), T, and V; Laboratory fume hoods and vents; and After identification of the emissions unit and agreement by the Department, any other emissions unit that is not subject to an applicable requirement of the Clean Air Act. Potential emissions from all exempt emission units and activities shall be included in the determination of whether a source is a major source. A permit applicant may not omit information on an emissions unit that is necessary to determine the applicability of, or to impose, an applicable requirement of the Clean Air Act. The listing of emissions units and activities in §A of this regulation does not exempt an emissions unit or activity from any requirement of this subtitle except as specified in this regulation. Emissions units or activities that use Class I or Class II ozone-depleting substances subject to an applicable requirement established under Title VI of the Clean Air Act are not exempt from the Part 70 permit application.