NR 420.04(1)(a)(a) Applicability. This subsection applies, subject to the provisions of s. NR 425.03, to all bulk gasoline terminals and the associated equipment necessary to load tank truck or trailer compartments.

NR 420.04(1)(b)(b) Vapor control system. No person may load gasoline into any tank trucks or trailers from any bulk gasoline terminal unless all of the following requirements are met:

NR 420.04(1)(b)1.1. The bulk gasoline terminal is equipped with a vapor control system which is properly installed, in good working order, in operation and consisting of one of the following:

NR 420.04(1)(b)2.2. All displaced vapors and gases are vented only to the vapor control system.

NR 420.04(1)(b)3.3. A means is provided to prevent liquid drainage from the loading device when it is not in use or to accomplish complete drainage before the loading device is disconnected.

NR 420.04(1)(b)4.4. All loading and vapor lines are equipped with fittings which make vapor tight connections and which close automatically when disconnected.

NR 420.04(1)(c)(c) Emission limitation. The vapor control system required under par. (b) 1. may not allow mass emissions of VOCs from control equipment to exceed 80 milligrams per liter (4.7 grains per gallon) of gasoline loaded.

NR 420.04(1)(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(1)(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(1)(d)3.3. Avoidable visible liquid leaks during loading or unloading operations.

NR 420.04(1)(e)(e) Repair deadline. Provisions shall be made to repair and retest a vapor collection or control system that exceeds the limits of par. (d) 2. within 15 days.

NR 420.04(1)(f)1.1. Allow gasoline to be discarded in sewers or stored in open containers, s. NR 419.04 notwithstanding.

NR 420.04(1)(f)2.2. Allow the pressure in the vapor collection system to exceed the tank truck or trailer pressure relief settings.

NR 420.04(1)(g)(g) Truck sticker. No person may load gasoline into any tank truck or trailer from any bulk gasoline terminal unless the tank truck displays a current sticker demonstrating that the truck is in compliance with sub. (4).

NR 420.04(2)(a)(a) Applicability. Subject to the provisions of s. NR 425.03, this subsection applies to the unloading, loading, and storage facilities of all bulk gasoline plants which have an average daily throughput of 15,000 liters (4,000 gallons) of gasoline or more on a 30-day rolling average; and to all delivery vessels involved in such loading or unloading operations, except as provided in subds. 1. and 2. Any plant that becomes or is subject to this subsection shall remain subject to this subsection even if its throughput later falls below the applicability thresholds. The requirements of pars. (b) to (g) do not apply to the following:

NR 420.04(2)(a)1.1. The loading or unloading of stationary storage tanks with a capacity of 2,176 liters (575 gallons) or less, notwithstanding s. NR 439.10.

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: