NR 420.035(2)(a) (a) No owner or operator of a gasoline dispensing facility described in sub. (1) (a) may permit gasoline to be transferred from either a gasoline delivery vessel to a stationary storage tank, or from a stationary storage tank to a motor vehicle fuel tank, unless the owner or operator has installed a pressure vacuum valve on the stationary gasoline storage tank vent pipe.

NR 420.035(2)(b) (b) The owner or operator of a gasoline dispensing facility subject to par. (a) shall ensure that each pressure vacuum valve installed on a storage tank vent pipe is certified by the California air resources board under section 41954 of the California health and safety code, and is maintained in good working order.

NR 420.035(3) (3) Compliance schedule.

NR 420.035(3)(a) (a) The owner or operator of a gasoline dispensing facility subject to sub. (2) on August 1, 1994 shall install a pressure vacuum valve on each stationary gasoline storage tank vent pipe by March 31, 1995.

NR 420.035(3)(b) (b) The owner or operator of an existing gasoline dispensing facility previously exempt from the vapor control requirements of sub. (2) because its gasoline storage tank capacity was less than 2000 gallons shall install a pressure vacuum valve on each stationary gasoline storage tank vent pipe not later than 120 days after the exemption level is exceeded, making sub. (2) applicable.

NR 420.035(3)(c) (c) The owner or operator of a gasoline dispensing facility on which construction was commenced after August 1, 1994 and which is subject to the vapor control requirements of sub. (2) shall install a pressure vacuum valve on each stationary gasoline storage tank vent pipe before the tank is first filled with gasoline.

NR 420.035 History History: Cr. Register, July, 1994, No. 463, eff. 8-1-94; am. (2) (b), Register, December, 1995, No. 480, eff. 1-1-96.

NR 420.04 NR 420.04 Transfer operations and associated equipment.

NR 420.04(1) (1) Bulk gasoline terminals.

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)1.a. a. An adsorber, absorption, refrigeration or condensation system.

NR 420.04(1)(b)1.b. b. A vapor collection system which directs all vapors to a fuel gas system.

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) (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(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) (f) Precautions. Sources to which this subsection applies may not do either of the following:

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) (2) Bulk gasoline plants.

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: