Section 18.75.066. 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 shall meet the requirements 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 ensure that  
		(1) one of the following standards is used for the design and construction of each shop-fabricated aboveground oil storage tank:  
			(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, Third Edition, July 2005 (STI SP00l), adopted by reference;  
		(2) the American Petroleum Institute's (API) Tank Inspection, Repair, Alteration, and Reconstruction, Third Edition, December 2001, and Addendum 1, September 2003 (API 653), adopted by reference;  
		(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.  

Authorities

46.03.020;46.04.030;46.04.070

Notes

Reference

18 AAC 75.045
18 AAC 75.055
18 AAC 75.075
18 AAC 75.425
18 AAC 75.990

Authority

AS 46.03.020 AS 46.04.030 AS 46.04.070 Editor's note: The publications adopted by reference in 18 AAC 75.066 may be reviewed at the department's offices in Anchorage, Fairbanks or Juneau, 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 [phone]; fax [phone]; website: http://www.ul.com; Steel Tank Institute (STI), 570 Oakwood Road, Lake Zurich, Illinois 60062; telephone [phone], extension 4331; fax [phone]; website: http://www.steeltank.com; American Petroleum Institute (API), 1220 L Street NW, Washington DC 20005-4070; telephone [phone]; fax [phone]; website: http://global.ihs.com/?RID=API1.

History

Eff. 12/30/2006, Register 180

References

18.75.066