NR 420.04(2)(a)2.2. Bulk plant unloading facilities, the delivery vessels receiving gasoline from bulk plants, and the operation of transferring gasoline from bulk plant to delivery vessel when the transfer takes place outside the counties of Brown, Calumet, Dane, Dodge, Door, Fond du Lac, Jefferson, Kenosha, Kewaunee, Manitowoc, Milwaukee, Outagamie, Ozaukee, Racine, Rock, Sheboygan, Walworth, Washington, Waukesha and Winnebago or when the gasoline is delivered exclusively to facilities exempted from the requirements of sub. (3) by sub. (3) (a) 1., 2., 3., 4., 5. or 6. However, the requirements of pars. (b) to (g) do apply if gasoline is transferred during the ozone season to a delivery vessel whose last previous delivery was to a gasoline dispensing facility, either inside or outside this state, which is required to have a vapor balance system.

NR 420.04(2)(b)(b) Equipment requirements for bulk plants. No owner or operator of a bulk gasoline plant may permit stationary storage tanks to load or unload gasoline unless each tank is equipped with a vapor balance system as described under par. (e) and approved by the department, and with one of the following:

NR 420.04(2)(b)1.1. A submerged fill pipe approved by the department.

NR 420.04(2)(b)2.2. A fill line whose discharge opening is flush with or near the bottom of the tank.

NR 420.04(2)(c)(c) Equipment requirements for delivery vessels. No owner or operator of a bulk gasoline plant or delivery vessel may permit the gasoline transfer operations regulated under this subsection unless each delivery vessel involved in such operations is equipped with a vapor balance system as described under par. (e) and approved by the department and the following conditions are met:

NR 420.04(2)(c)1.1. Equipment is available at the bulk gasoline plant to provide for the submerged filling of each delivery vessel or each delivery vessel is equipped for bottom filling.

NR 420.04(2)(c)3.3. After October 1, 1981, the tank truck displays a current sticker demonstrating that the truck is in compliance with sub. (4).

NR 420.04(2)(d)(d) Transfer requirements. No owner or operator of a bulk gasoline plant or delivery vessel may permit the transfer of gasoline unless all of the following requirements are met:

NR 420.04(2)(d)1.1. Submerged or bottom filling is used.

NR 420.04(2)(d)2.2. The vapor balance system is in good working order and is connected and operating.

NR 420.04(2)(d)3.3. Delivery vessel hatches are closed at all times during transfer operations.

NR 420.04(2)(d)4.4. There are no leaks in the delivery vessels’ pressure-vacuum relief valves and hatch covers, nor in the delivery vessel tanks or stationary storage tanks or associated vapor and liquid lines during loading or unloading.

NR 420.04(2)(d)5.5. The pressure relief valves on stationary storage tanks and delivery vessels are set to release at no less than 4.8 kPa (0.7 psig), or the highest possible pressure consistent with state or local fire codes or the national fire prevention association guidelines.

NR 420.04(2)(e)(e) Vapor balance system. Vapor balance systems required under pars. (b) and (c) shall include vapor space connections on the stationary storage tank and on the delivery vessel with connecting pipe or hose. These connections are required either for loading of the bulk plant storage tank only or for both loading and unloading, as indicated in par. (a). Both sides of all junctions shall be equipped with fittings which are vapor tight and will automatically and immediately close upon disconnection so as to prevent release of organic compound vapors.

NR 420.04(2)(f)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(2)(f)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(2)(f)3.3. Avoidable visible liquid leaks during loading or unloading operations.

NR 420.04(2)(g)(g) Repair deadline. Provisions shall be made to repair and retest a vapor collection or control system that exceeds the limits of par. (f) 2. within 15 days.

NR 420.04(2)(h)(h) Precautions. Notwithstanding s. NR 419.04, no owner or operator of a bulk gasoline plant may permit gasoline to be spilled, discarded in sewers or stored in open containers.

NR 420.04(3)(a)(a) Applicability. Subject to the provisions of s. NR 425.03, this subsection applies to gasoline dispensing facilities, to the delivery vessels used to bring these facilities the gasoline which they dispense, and to the operation of transferring gasoline to the dispensing facilities with the following exceptions:

NR 420.04(3)(a)1.1. Gasoline dispensing facilities which are supplied exclusively by bulk gasoline plants whose unloading operations are exempted from the requirements of sub. (2) by sub. (2) (a) 1.

NR 420.04(3)(a)2.2. Gasoline dispensing facilities located outside the counties of Brown, Calumet, Dane, Dodge, Door, Fond du Lac, Jefferson, Kenosha, Kewaunee, Manitowoc, Milwaukee, Outagamie, Ozaukee, Racine, Rock, Sheboygan, Walworth, Washington, Waukesha and Winnebago.

NR 420.04(3)(a)3.3. Delivery vessels used exclusively to supply exempt gasoline dispensing facilities or used exclusively for the transfer operations exempted under subds. 4. to 6.

NR 420.04(3)(a)4.4. Transfers made to storage tanks of gasoline dispensing facilities equipped with floating roofs or their equivalent which have been approved by the department.

NR 420.04(3)(a)5.5. Transfers made to any stationary storage tank at a gasoline dispensing facility with a capacity of 7,580 liters (2,000 gallons) or less which is in place on or before August 1, 1979.

NR 420.04(3)(a)6.6. Transfers made to any stationary storage tank at a gasoline dispensing facility with a capacity of 2,176 liters (575 gallons) or less which is installed after August 1, 1979.