Section 18 AAC 75.066 - Shop-fabricated aboveground oil storage tanks(a) The owner or operator of a shop-fabricated aboveground oil storage tank placed in service (1) on or before December 30, 2008 shall meet the requirements of (f) - (h) of this section;(2) after December 30, 2008 and before {May 17,2022} shall meet the requirements of (b) - (h) of this section; or(3) on or after May 17,2022 shall meet the requirements of (c) - (j) of this section.(b) Unless the owner or operator must comply with a more stringent requirement set out in this section, the owner or operator shall meet each of the following requirements: (1) each shop-fabricated aboveground oil storage tank is constructed and installed in compliance with (A) Underwriters Laboratories' (UL) Steel Aboveground Tanks for Flammable and Combustible Liquids, Eighth Edition, dated July 11, 2002 (UL 142), adopted by reference;(B) Appendix J of the American Petroleum Institute's (API) Welded Steel Tanks for Oil Storage, 10th Edition, November 1998, Addendum 1, January 2000, Addendum 2, November 2001, and Addendum 3, September 2003 (API 650), adopted by reference;(C) the American Petroleum Institute's (API) Specification for Shop Welded Tanks for Storage of Production Liquids, 11th Edition, November 1994 (API Spec 12F), adopted by reference;(D) the Steel Tank Institute's (STI) Standard for Aboveground Tanks with Integral Secondary Containment,revised as of October 21, 2004 (STI F921-03), adopted by reference;(E) Underwriters Laboratories' (UL) Protected Aboveground Tanks for Flammable and Combustible Liquids, Second Edition, revised as of December 1, 1999 (UL 2085), adopted by reference; or(2) the design of a shop-fabricated aboveground oil storage tank is certified by a registered engineer, and approved by the department as equivalent to a design for which a standard listed in (1) of this subsection is used.(c) The owner or operator of a vaulted shop-fabricated aboveground oil storage tank shall ensure that the tank has (1) a discrete secondary containment vault system (A) constructed of (i) seamless, poured concrete that is sealed or lined;(ii) welded carbon or stainless metal; or(iii) other impermeable material; and(B) able to contain 100 percent of the volume of the tank plus any necessary allowance for precipitation; and(2) sufficient personnel access to allow full physical inspection of all sides of the tank.(d) The owner or operator of a self-diked shop-fabricated aboveground oil storage tank shall ensure that the tank (1) has access that allows visual inspection for corrosion or damage to the(A) outer shell of the storage tank; and(B) interior surfaces of the integral secondary containment dike;(2) has, at each tank fill connection, a fixed overfill spill containment system designed to prevent a discharge when a transfer hose or pipe is detached from the tank fill pipe or to divert that discharge into the secondary containment dike;(3) is equipped with a system for freeing water or spilled fuel from the integral dike and for regular maintenance in accordance with 18 AAC 75.075(c) and (d); and(4) is equipped with an operating interstitial monitoring system that enables an observer from outside the tank to detect oil leaks from the tank bottom and water accumulation within the secondary containment area.(e) The owner or operator of a double-walled shop-fabricated aboveground oil storage tank shall ensure that the tank is equipped(1) with an operating interstitial monitoring system that enables an observer from outside the tank to detect oil leaks and water accumulation;(2) at each tank fill connection with a fixed overfill spill containment system designed to prevent a discharge when a transfer hose or pipe is detached from the tank fill pipe; and(3) with a system for freeing water or spilled fuel from the interstitial space and for regular maintenance in accordance with 18 AAC 75.075(c) and (d).(f) Unless the owner or operator must comply with a more stringent requirement set out in this section, the owner or operator of an oil terminal facility, crude oil pipeline, exploration facility, or production facility shall ensure that one of the following standards is used for the maintenance and inspection of each shop-fabricated aboveground oil storage tank: (1) the Steel Tank Institute's (STI) Standard for the Inspection of Aboveground Storage Tanks, Sixth Edition, January 2018 (STI SP001 [SP001]), adopted by reference;(2) the American Petroleum Institute's (API) Tank Inspection, Repair, Alteration, and Reconstruction, Fifth Edition, November 2014, Addendum 1, April 2018, and Addendum 2, May 2020 (API 653), adopted by reference; or(3) another equivalent standard approved by the department.(g) In addition to meeting the applicable requirements of 18 AAC 75.025, the owner or operator of a shop-fabricated aboveground oil storage tank (1) shall ensure that the tank is equipped with one or more of the following means of preventing discharges: (A) high liquid level alarms with signals that sound and display in a manner immediately recognizable by personnel conducting a transfer;(B) high liquid level automatic pump shutoff devices set to stop flow at a predetermined tank content level;(C) a means of immediately determining the liquid level of each bulk storage tank, if the liquid level is closely monitored during a transfer;(D) a system approved by the department which will immediately notify the operator of high liquid levels; and(2) if the tank is placed in service after December 30, 2008, shall ensure that the tank is equipped, at each tank fill connection, with a fixed overfill spill containment system designed to prevent a discharge when a transfer hose or pipe is detached from the tank fill pipe.(h) The owner or operator of a shop-fabricated above ground oil storage tank shall ensure that each discharge prevention device for the tank is tested before each transfer operation or monthly, whichever is less frequent. If monthly testing would necessitate interrupting the operation of a system subject to continuous flow, the owner or operator may substitute monthly inspection and annual testing for the monthly testing of overfill protection devices.(i) A shop-fabricated aboveground oil storage tank that is not elevated must be equipped with(1) a leak detection system, designed and installed in accordance with Annex I of the American Petroleum Institute's (API) Welded Tanks for Oil Storage (API 650), adopted by reference in (j) of this section; and(2) one of the following systems, installed to protect the bottom of each shop-fabricated aboveground oil storage tank from external corrosion:(A) a cathodic protection system, unless determined not necessary by an evaluation conducted by a corrosion expert consistent with Chapter 5 of the American Petroleum Institute's (API) Cathodic Protection of Aboveground Petroleum Storage Tanks, Fourth Edition, September 2014 (API RP 651), adopted by reference; a cathodic protection system must be (i) designed by a corrosion expert;(ii) installed under the supervision of a corrosion expert; and(iii) installed, operated, and maintained in accordance with Standard Practice: Application of Cathodic Protection to Control External Corrosion of Carbon Steel On-Grade Storage Tank Bottoms (NACE SP0193-2016), adopted by reference in 18 AAC 75.065(h); a corrosion expert or qualified cathodic protection tester shall perform a cathodic protection survey specified under that standard; or(B) a corrosion control system approved by the department as an alternate to the cathodic protection system described in (A) of this paragraph, unless determined not necessary by an evaluation conducted by a corrosion expert consistent with Chapter 5 of Cathodic Protection of Aboveground Petroleum Storage Tanks (API RP 651), adopted by reference in (A) of this paragraph.(j)Unless the owner or operator must comply with a more stringent requirement set out in this section, each shop-fabricated aboveground oil storage tank must be constructed and installed in compliance with one of the following standards:(1) Underwriters Laboratories' (UL) Steel Aboveground Tanks for Flammable and Combustible Liquids, 10th Edition, dated May 17, 2019 (UL 142), adopted by reference;(2)Welded Tanks for Oil Storage, (API 650) adopted by reference in 18 AAC 75.065(q);(3) the American Petroleum Institute's (API) Specification for Shop-welded Tanks for Storage of Production Liquids, 13th Edition, January 2019 (API Spec. 12F), adopted by reference; or(4) another equivalent standard approved by the department.(k) Shop-fabricated aboveground oil storage tanks with a storage capacity of less than 75,000 gallons must meet the requirements under this section. Shop-fabricated aboveground oil storage tanks placed in service on or after November 18,2021 with a storage capacity of 75,000 gallons or greater must meet the requirements under 18 AAC 75.065. Eff. 12/30/2006, Register 180 ; am 11/18/2021, Register 240, January 2022The publications adopted by reference in 18 AAC 75.066 may be reviewed at the department's Anchorage office, or may be obtained directly from the appropriate publisher. The mailing address, telephone number, facsimile number, and website, if available, for each publisher are as follows: Underwriters Laboratories, Inc. (UL), Standards Department, 333 Pfingsten Road, Northbrook, Illinois 60062; telephone (708) 272-8800; fax (708) 272-8129; website: http://www.ul.com; Steel Tank Institute (STI), 570 Oakwood Road, Lake Zurich, Illinois 60062; telephone (708) 438-8265, extension 4331; fax (708) 438-8766; website:https://www.api.org; NACE International Headquarters, 15835 Park Ten Place, Houston, Texas 77084, telephone: (281) 228-6200; fax: (281) 228-6300; website: https://www.nace.org.
Authority:AS 46.03.020
AS 46.04.030
AS 46.04.070