18 AAC 50.090. Volatile liquid loading racks and delivery tank emission standards

(a) The owner, operator, or permittee of a stationary source that is located in the Port of Anchorage and that has a volatile liquid loading rack with a design throughput of 15 million gallons (357,143 barrels) or more per year shall reduce organic vapors emitted to the atmosphere by

(1) operating a vapor collection system and liquid product loading equipment that

(A) loads volatile liquid through the bottom of the delivery tank or through a submerged loading arm that extends to within six inches of the bottom of the delivery tank;

(B) collects all organic vapors displaced during the loading of vapor-laden delivery tanks;

(C) prevents any organic vapors collected at one delivery tank loading position from passing to another delivery tank loading position;

(D) processes the vapors collected under (B) of this paragraph with

(i) a control device that emits no more than 10 milligrams of organic vapors per liter of volatile liquid loaded (six-hour average); or

(ii) a system that the department determines is as effective as the control device described in (i) of this subparagraph; in making a determination under this clause, the department will use the procedures specified in the department's Air Quality Compliance Certification Procedures for Volatile Liquid Storage Tanks, Delivery Tanks, and Loading Racks, adopted by reference in 18 AAC 50.030;

(E) prevents the gauge pressure in any delivery tank connected to the vapor collection system from exceeding 18 inches of water; and

(F) does not contain a pressure relief valve designed to open at a gauge pressure of less than 18 inches of water, except that for a system using vapor balancing to a storage tank, a pressure relief valve on the storage tank or on any portion of the vapor collection system between a storage tank and the control device may be designed to open at a gauge pressure less than 18 inches of water, but may not open at the normal system operating pressure;

(2) preventing the loading of liquid product into any vapor-laden delivery tank unless the tank

(A) is connected to a vapor collection system that meets the requirements of (1) of this subsection; and

(B) has been certified vapor-tight under (b) of this section within the preceding 12 months; and

(3) preventing leaks in the vapor collection system or liquid loading equipment that result in the release of a volatile liquid organic or a volatile organic vapor in a concentration exceeding 10,000 ppm by volume, measured as methane.

(b) In accordance with the department's Air Quality Compliance Certification Procedures for Volatile Liquid Storage Tanks, Delivery Tanks, and Loading Racks, adopted by reference in 18 AAC 50.030, the owner or operator of a delivery tank that is to be loaded with volatile liquid at a loading rack described in (a) of this section shall

(1) perform annual tests to certify that the delivery tank is vapor-tight;

(2) mark the delivery tank with the month and year that the tank was last certified vapor-tight according to the test required under (1) of this subsection;

(3) provide the owner, operator, or permittee of the loading rack with a copy of the most recent test results under (1) of this subsection; and

(4) keep a copy of the most recent test results with the delivery tank.

(c) When conducting source testing, the department will, and the owner, operator, or permittee shall, use the procedures specified in the department's Air Quality Compliance Certification Procedures for Volatile Liquid Storage Tanks, Delivery Tanks, and Loading Racks, adopted by reference in 18 AAC 50.030, to determine compliance with this section. In accordance with those procedures, the owner, operator, or permittee shall

(1) periodically inspect air pollution control equipment;

(2) repair any deficiencies detected;

(3) report to the department the results of all inspections and repairs; and

(4) keep records of all inspections and repairs for at least five years.

History: Eff. 1/18/97, Register 141; am 10/1/2004, Register 171

Authority: AS 46.03.020

AS 46.14.010

AS 46.14.020

AS 46.14.030

Sec. 30, ch. 74, SLA 1993

Editor's note: A complete description of the Port of Anchorage is in the state air quality control plan adopted by reference in 18 AAC 50.030.

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