NR 420.04(3)(c)2.2. A refrigeration-condensation system capable of recovering at least 90% by weight of the organic compounds in the displaced vapor or an equally effective alternative control method approved by the department. Any alternative control method approved by the department under this subdivision shall be submitted to, and will not become effective for federal purposes until approved by, the administrator or designee as a source-specific revision to the department’s state implementation plan for ozone. NR 420.04(3)(d)(d) Operating requirements. The vapor collection system and the gasoline loading equipment shall be designed and operated in a manner that prevents: NR 420.04(3)(d)1.1. Gauge pressure from exceeding 4.5 kPa (18 inches of H2O) and vacuum from exceeding 1.5 kPa (6 inches of H2O) in the gasoline tank truck. NR 420.04(3)(d)2.2. A reading equal to or greater than 100% of the LEL at 2.5 centimeters from all points on the perimeter of a potential leak source. NR 420.04(3)(d)3.3. Avoidable visible liquid leaks during loading or unloading operations. NR 420.04(3)(e)(e) Delivery vessel unloading. The operator of a delivery vessel may not commence transfer of gasoline to any gasoline dispensing facility equipped with a vapor balance system pursuant to par. (c) 1. without first properly connecting the vapor return line. The delivery vessel shall be designed, maintained and operated to be vapor tight at all times that it is vapor-laden. NR 420.04(3)(f)(f) Delivery vessel refilling. During the ozone season, vapor-laden delivery vessels shall be refilled in this state only at one of the following: NR 420.04(3)(f)2.2. Bulk gasoline plants equipped with a vapor balance system for unloading as described in sub. (2) (e). NR 420.04(3)(g)(g) Control equipment installation and maintenance. Each owner of a gasoline storage tank or delivery vessel shall do all of the following: NR 420.04(3)(g)1.1. Install all necessary control systems and make all necessary process modifications in accordance with pars. (b), (c), (d) and (e). NR 420.04(3)(g)2.2. Repair, replace or modify any worn out or malfunctioning component or element of design, and keep such records as may be requested in writing by the department relating to the repair, replacement or modification of any component or element of design of the control system. NR 420.04(3)(g)3.3. Repair and retest a vapor collection or control system that exceeds the limits of par. (d) 2. within 15 days. NR 420.04(3)(h)(h) Control equipment operating and maintenance instructions. Each owner of a gasoline storage tank shall provide written instructions to the operator of the gasoline dispensing facility describing necessary operating and maintenance procedures and procedures for prompt notification of the owner in case of any malfunction of the control system. NR 420.04(3)(i)(i) Control system operation and maintenance requirements. Each operator of a gasoline dispensing facility shall: NR 420.04(3)(i)1.1. Maintain and operate the control system in accordance with the specifications and the operating and maintenance procedures specified by the owner. NR 420.04(3)(i)2.2. Promptly notify the owner of the control system of any scheduled maintenance or of any malfunction requiring replacement or repair of major components of the system. NR 420.04(3)(i)3.3. Keep on the premises a copy of the instructions provided pursuant to par. (h) and make these instructions available to an authorized representative of the department on request. NR 420.04(3)(i)4.4. Maintain such records on maintenance and malfunction as may be requested in writing by the department. NR 420.04(3)(i)5.5. Maintain gauges, meters, or other specified testing devices in proper working order. NR 420.04(4)(a)(a) Applicability. This subsection applies, with compliance deadlines in accord with the compliance schedules for subs. (1) to (3), to all gasoline delivery vessels except those exempted from vapor balance system installations under subs. (2) (a) and (3) (a) 3. NR 420.04(4)(b)(b) Equipment requirements. Except as provided under par. (a), the owner or operator of a gasoline delivery vehicle shall: NR 420.04(4)(b)1.1. Provide for all gasoline delivery vessels to be equipped for gasoline vapor collection. NR 420.04(4)(b)2.2. Provide for all loading and vapor lines to be equipped with fittings which make vapor-tight connections. NR 420.04(4)(b)3.3. Equip vapor lines leading to the vapor space in the delivery vessel with fittings which close automatically when disconnected. NR 420.04(4)(b)4.4. Demonstrate through the sticker required in subd. 5. that the gasoline delivery vessel is in compliance with the following provisions: NR 420.04(4)(b)4.b.b. The vessel may not undergo a pressure change of more than 0.75 kPa (3 inches of H2O) in 5 minutes when pressurized to a gauge pressure of 4.5 kPa (18 inches of H2O) or evacuated to a gauge pressure of 1.5 kPa (6 inches of H2O) during the test required in subd. 4. a.