Current through Register Vol. 35, No. 6, March 26, 2024
No later than three years after the effective date of the
regulations, all airport hydrant fuel distribution systems, UST systems with
field-constructed tanks, and hybrid storage tank systems installed prior to the
effective date of these regulations shall comply with the following
requirements:
A. Above ground storage
tank systems. Tanks greater than 10 years old without cathodic protection must
be assessed to ensure the tank is structurally sound and free of corrosion
holes prior to adding cathodic protection. The assessment must be by internal
inspection or another method determined by the department to adequately assess
the tank for structural soundness and corrosion holes. AST systems or system
components found to be structurally unsound or to have corrosion holes or
damage shall be replaced in accordance with the requirements for a new AST
system in 20.5.109 NMAC or permanently closed in accordance with 20.5.115 NMAC.
AST systems shall be protected from corrosion in accordance with 20.5.109 NMAC
and 20.5.110 NMAC and shall comply with spill and overfill prevention equipment
requirements in accordance with 20.5.109 NMAC and 20.5.110 NMAC.
B. Underground storage tank systems. UST
system components in contact with an electrolyte and that routinely contain
regulated substances shall meet one of the following:
(1) be constructed of a non-corrodible
material or steel clad with a non-corrodible material that meets the
performance standards in 20.5.106.603 NMAC and 20.5.106.609 NMAC; or
(2) be constructed of metal and cathodically
protected in accordance with the requirements in 20.5.106 NMAC, 20.5.107 NMAC,
and in accordance with a code of practice developed by a nationally recognized
association or independent testing laboratory and meet the following:
(a) Tanks greater than 10 years old without
cathodic protection must be assessed to ensure the tank is structurally sound
and free of corrosion holes prior to adding cathodic protection. The assessment
must be by internal inspection or another method determined by the department
to adequately assess the tank for structural soundness and corrosion
holes.
(b) Existing steel tanks
shall comply with the upgrade requirements in 20.5.106.607 NMAC.
C. Piping.
(1) Metal piping on an airport hydrant system
or field-constructed UST system that is in contact with an electrolyte must be
cathodically protected in accordance with requirements of 20.5.106 NMAC,
20.5.107 NMAC, and in accordance with a code of practice developed by a
nationally recognized association or independent testing laboratory.
(2) Metal underground piping or piping in
contact with an electrolyte on a hybrid storage tank system shall be either
secondarily contained or replaced with double walled non-corrodible piping with
containment sumps at both ends.
D. Spill and overfill prevention equipment.
Owners and operators shall comply with the spill and overfill prevention
requirements as follows:
(1) AST systems with
capacities of less than 55,000 gallons and greater than 1320 gallons and
associated with airport hydrant systems or USTs with field-constructed tanks
shall meet the requirements for spill and overfill prevention equipment in
20.5.109.910 NMAC;
(2) UST systems
associated with airport hydrant systems or USTs with field-constructed tanks
shall meet the requirements for spill and overfill prevention equipment in
20.5.106.613 NMAC.
E.
Hybrid storage tank systems.
(1) Any UST
receiving deliveries of regulated substance by a remote fill pipe connected to
an above ground storage tank shall be equipped with a containment sump at the
connection to the UST.
(2) Any
remote fill piping shall be constructed of double walled piping and be
interstitially monitored in accordance with 20.5.108.811 NMAC or 20.5.108.813
NMAC as applicable.
(3) Remote fill
piping shall be equipped with a transition sump where the piping enters the
ground from the AST.
(4) Any UST
receiving deliveries of regulated substance by a remote fill pipe connected to
an AST shall be equipped with redundant overfill prevention and pressure
regulating devices to include the following:
(a) an overfill prevention device that shall
activate an audible and visual alarm at eighty-five percent of the UST
capacity;
(b) an overfill
prevention device that shall automatically restrict fuel delivery without
increasing pressure on the UST at ninety percent of the UST capacity;
(c) an overfill prevention device that shall
automatically shut off the delivery at ninety-five percent of the UST
capacity;
(d) devices that monitor
and limit both the flow and pressure placed on the UST and the piping from the
AST to the UST during the delivery of regulated substance such that the
delivery pipe pressure shall not exceed normal operating pressure in accordance
with the manufacturer's specification; and
(e) a tank venting system, which must be
adequately sized to ensure that atmospheric pressure is continuously
maintained, including during filling and emptying of tank.
F. Secondary containment. Owners
and operators shall comply with the secondary containment requirements as
follows:
(1) Tanks and piping for UST systems
with field-constructed tanks replaced after the effective date of these
regulations shall be secondarily contained upon installation for tanks with
capacities of 50,000 gallons or less that are not part of an airport hydrant
system.
(2) Secondary containment
shall not be required for piping on UST systems with field-constructed tanks
that are replaced after the effective date of these regulations where the tank
capacity is greater than 50,000 gallons.
(3) Hydrant pits installed on existing
airport hydrant systems after the effective date of these regulations shall be
secondarily contained.
G.
Owners and operators shall use one of the following codes of practice to comply
with corrosion protection requirements in this section:
(1)
NACE International Standard
Practice SP 0285, "External Corrosion Control of Underground Storage Tank
Systems by Cathodic Protection";
(2)
NACE International Standard
Practice SP 0169, "Control of External Corrosion on Underground or Submerged
Metallic Piping Systems";
(3)
National Leak Prevention
Association Standard 631, Chapter C, "Internal Inspection of Steel Tanks for
Retrofit of Cathodic Protection"; or
(4)
American Society for Testing and
Materials Standard G158, "Standard Guide for Three Methods of Assessing Buried
Steel Tanks".
H.
In addition to the industry codes of practice and standards listed in 20.5.106
NMAC and 20.5.109 NMAC owners and operators may use Unified Facilities
Criteria (UFC) 3-460-01, "Design: Petroleum Fuel Facilities" to comply
with these requirements.
