Code of Maine Rules › 06 - DEPARTMENT OF ENVIRONMENTAL PROTECTION › 096 - DEPARTMENT OF ENVIRONMENTAL PROTECTION - GENERAL › Chapter 600 - OIL DISCHARGE PREVENTION AND POLLUTION CONTROL RULES FOR MARINE OIL TERMINALS, TRANSPORTATION PIPELINES AND VESSELS › Section 096-600-8 - Existing Land Based Oil Terminal Facility Minimum Design Standards, Construction Standards, and Related Measures

Current through 2024-29, July 17, 2024
A.
Notification of Work.
The
				owner or operator shall notify the Department of substantial modifications,
				rehabilitation, and new construction including, but not limited to, the
				installation of new tanks and tank floors, tank repairs, the construction of
				new secondary containment, new dikes, and new dike floor liners prior to
				implementation, and excavations within 10 feet of underground piping. The
				designs must be signed and sealed by a State of Maine licensed professional
				engineer or an engineer otherwise working in compliance with Maine's
				professional regulation statutes.
B.
Aboveground Oil Storage
				Tanks.
(1) New Tanks. Any new
				aboveground oil storage tank added to an existing terminal must meet the rules
				and construction standards of Section (7)(B) of this Chapter. A new tank may
				vary from the spacing requirements if an alternate fire plan is approved by the
				State Fire Marshal's Office and the local fire suppression agency.
(2) Reuse of Tanks. Existing aboveground oil
				storage tanks that have been closed may be reused only if the following
				conditions are met:
(a) The existing tank must
				have an ASME code stamp, API nameplate, or UL label; and
(b) Satisfactory documentation must be
				provided to the Department that the tank has been inspected by a qualified
				State of Maine licensed professional engineer or an engineer otherwise working
				in compliance with Maine's professional regulation statutes and found to meet
				the specifications of API 650. The documentation must be signed and sealed by
				the professional engineer that conducted the inspection.
(3) Corrosion Protection. All existing
				aboveground oil storage tanks must have a cathodic protection system for any
				portion of the tank in contact with soil or backfill, in accordance with API RP
				651, API 650, and API 653 or NACE SP0169, unless a cathodic protection
				assessment as described in Section (2) of this Chapter indicates that the
				corrosion rate will not reduce the floor thickness below the minimum allowed in
				API 653 before the next required internal inspection date. The cathodic
				protection system must be installed when a release prevention barrier is
				installed. The owner or operator may propose alternate corrosion protection
				measures addressed in API 651 other than cathodic protection for review and
				approval by the Department, provided the methods are based on good engineering
				principles and current industry practice.
Note: Impressed current cathodic protection systems are
				  recommended for double bottom tanks.
(4) Painting. The exterior tank shell on
				existing aboveground oil storage tanks must be painted and maintained in good
				condition to prevent excessive rusting and or corrosion to the exterior of the
				tank. Tank painting must be in accordance with nationally recognized industry
				standards, such as the SSPC publication
Painting Manual, Volume 1, Good
				Painting Practice.
Insulated tanks are exempt from this
				requirement.
(5) Upgrade and Repair
				of Tanks. If an aboveground oil storage tank inspection reveals a discharge,
				excessive corrosion, excessive tank settlement, or any other deficiency which
				could result in a discharge, the tank must be repaired to standards equal to or
				better than the standards of original construction.
(a) Unacceptable levels of corrosion and tank
				settlement are as defined
in API RP 651, API 650, and API
				653.
(b) All riveted and
				bolted tanks must have all seams sealed, including rivets and bolts on the
				bottom and first course of shell plates. Heated oil tanks storing #6 oil or
				asphalt are exempt from this requirement.
(i)
				An oil terminal owner or operator shall notify the Department within 3 days of
				discovery of a weep. A weep is defined as a film or stain that travels down the
				tank one complete ring from the rivets, bolts, or seams of a riveted or bolted
				aboveground oil storage tank. The notification must identify the tank and the
				location of the weep as it appears on the tank. Within 14 days of discovery of
				the weep, the oil terminal facility owner or operator shall either drain the
				tank below the level of the weep or propose an alternate method for controlling
				the weep acceptable to the Department prior to the weep being properly
				repaired.
(ii) A weep which comes
				in contact with the ground surface must be reported to the Department within
				two hours of its discovery. The oil terminal owner or operator shall drain the
				tank below the level of the weep within 14 days of discovery. The tank may not
				be filled above the level of the weep until the Department has received a
				report from the terminal owner or operator demonstrating that the weep has been
				properly repaired.
(c)
				Tank liners are not an acceptable form of tank bottom repair unless provisions
				are made for leak detection between the liner and the repaired steel
				bottom.
(6) Release
				Prevention for Tank Bottoms. Release Prevention Barriers (RPB) with leak
				detection must be provided for all active field constructed tank bottoms. Tanks
				used for asphalt and #6 fuel oil are exempt from the requirement for an RPB.
(a) An RPB may include a steel double bottom,
				a synthetic liner, a geosynthetic clay liner, a clay liner or existing soils
				under the tank provided they meet the standard in Section (8)(B)(6)(b) below,
				or such system as the Commissioner may determine provides the same protection
				from oil migration due to leakage and equivalent leak detection.
(b) Engineered clay or an existing soil liner
				under a tank may serve as an RPB if the engineered clay is at least 12 inches
				thick or the existing soil layer is at least 24 inches thick and meets the
				following water permeability standards:
Gasoline, ethanol
1 x 10-6
							 cm/sec
Mid Distillates
1 x 10-5
							 cm/sec
Crude Oil
1 x 10-5
							 cm/sec
#4, #5 Fuel Oils
1 x 10-4
							 cm/sec
Permeability of clay or existing soil RPB's must be
				  determined by a Maine licensed professional engineer or licensed geologist
				  using a method capable of testing both horizontal and vertical permeabilities.
				  A soil survey plan, test method, testing location and test protocol must be
				  submitted to the Department for approval.
(c) All tanks except those storing asphalt
				and #6 fuel oil must be fitted with leak detection upon installation of an RPB.
				Acceptable methods of leak detection are shown in
API 650
.
				Tanks using existing soil liners must have leak detection comprised of
				permeable sand or gravel of adequate thickness with collection pipes so that a
				leak can be detected before passing through the existing soil liner, or such
				other system as the Department may find acceptable. The Department considers
				criteria such as speed of detection and reliability for both the system and the
				leak detection method, as well as service life in evaluating and approving an
				alternate method.