Section 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 Alaska 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) 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; the owner or operator shall perform an annual test in accordance with 40 C.F.R. Part 60, Appendix A-8, Method 27, adopted by reference in 18 AAC 50.040(a), except that (A) the time period of the pressure test (t) is five minutes;(B) the initial pressure (P) is 450 millimeters, or 17.7 inches, of water;(C) the allowable pressure change is 75 millimeters, or three inches, of water; and(D) the test shall be performed for the volatile liquid as it would be for gasoline;(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 as follows: (A) for a delivery tank that is the tank portion of a tank truck or tank trailer, the delivery tank must be marked in accordance with the requirements of 49 C.F.R. 180.415(b)(3)(vii), as revised as of October 1, 2007, and adopted by reference;(B) for a delivery tank that is the tank portion of a rail tank car,(i) the delivery tank must be marked with letters and numerals at least four inches high;(ii) the color of the letters and numerals must contrast with the color of the tank;(iii) the delivery tank must be marked on both sides; a marking need not appear in an exact location; however, each marking must be clearly visible;(iv) the marking must be "V - month/year";(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.Eff. 1/18/97, Register 141; am 10/1/2004, Register 171; am 7/25/2008, Register 187; am 11/7/2020,Register 236, January 2021 A complete description of the Port of Alaska is in the state air quality control plan adopted by reference in 18 AAC 50.030.
Authority:AS 46.03.020
AS 46.14.010
AS 46.14.020
AS 46.14.030
Sec. 30, ch. 74, SLA 1993