Wisconsin Administrative Code
Department of Natural Resources
NR 400-499 - Environmental Protection - Air Pollution Control
Chapter NR 420 - Control Of Organic Compound Emissions From Petroleum And Gasoline Sources
Section NR 420.04 - Transfer operations and associated equipment

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:

2. All displaced vapors and gases are vented only to the vapor control system.

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.

4. All loading and vapor lines are equipped with fittings which make vapor tight connections and which close automatically when disconnected.

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.

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.

3. Avoidable visible liquid leaks during loading or unloading operations.

1. Allow gasoline to be discarded in sewers or stored in open containers, s. NR 419.04 notwithstanding.

2. Allow the pressure in the vapor collection system to exceed the tank truck or trailer pressure relief settings.

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.

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.

1. A submerged fill pipe approved by the department.

2. A fill line whose discharge opening is flush with or near the bottom of the tank.

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.

3. After October 1, 1981, the tank truck displays a current sticker demonstrating that the truck is in compliance with sub. (4).

1. Submerged or bottom filling is used.

2. The vapor balance system is in good working order and is connected and operating.

3. Delivery vessel hatches are closed at all times during transfer operations.

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.

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.

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.

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.

3. Avoidable visible liquid leaks during loading or unloading operations.

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.

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.

3. Delivery vessels used exclusively to supply exempt gasoline dispensing facilities or used exclusively for the transfer operations exempted under subds. 4. to 6.

4. Transfers made to storage tanks of gasoline dispensing facilities equipped with floating roofs or their equivalent which have been approved by the department.

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.

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.

1. The storage tank is equipped with a submerged fill pipe.

2. The vapors displaced from it by filling are processed by a vapor control system in accordance with par. (c).

3. After October 1, 1981, the tank truck displays a current sticker demonstrating that the truck is in compliance with sub. (4).

1. A vapor balance system with a vapor tight vapor return line from the storage tank to the delivery vessel and a system that will ensure the vapor line is connected before gasoline can be transferred into the storage tank.

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.

1. Gauge pressure from exceeding 4.5 kPa (18 inches of H 2O) and vacuum from exceeding 1.5 kPa (6 inches of H 2O) in the gasoline tank truck.

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.

3. Avoidable visible liquid leaks during loading or unloading operations.

1. Bulk gasoline terminals complying with sub. (1).

2. Bulk gasoline plants equipped with a vapor balance system for unloading as described in sub. (2) (e).

1. Install all necessary control systems and make all necessary process modifications in accordance with pars. (b), (c), (d) and (e).

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.

3. Repair and retest a vapor collection or control system that exceeds the limits of par. (d) 2. within 15 days.

1. Maintain and operate the control system in accordance with the specifications and the operating and maintenance procedures specified by the owner.

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.

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.

4. Maintain such records on maintenance and malfunction as may be requested in writing by the department.

5. Maintain gauges, meters, or other specified testing devices in proper working order.

1. Provide for all gasoline delivery vessels to be equipped for gasoline vapor collection.

2. Provide for all loading and vapor lines to be equipped with fittings which make vapor-tight connections.

3. Equip vapor lines leading to the vapor space in the delivery vessel with fittings which close automatically when disconnected.

4. Demonstrate through the sticker required in subd. 5. that the gasoline delivery vessel is in compliance with the following provisions:

5. Display a sticker near the department of transportation certification plate which:

6. Design and operate the gasoline loading and unloading equipment in a manner that prevents:

7. Repair and retest, within 15 days, components exceeding the limits of subd. 6. a.

1. Maintain for a period of 3 years from the recording date a log for each delivery vessel containing, at a minimum:

2. Annually submit to the department information as developed under par. (b) 4. b., and as recorded under subd. 1.