Current through Register Vol. 35, No. 6, March 26, 2024
Owners and operators of metal storage tank systems with any
metal tank or piping with corrosion protection shall comply with the following
requirements to ensure that releases due to corrosion are prevented until the
storage tank system is permanently closed or undergoes a change in service
pursuant to 20.5.115 NMAC.
A. Owners
and operators shall operate and maintain corrosion protection systems to
continuously provide corrosion protection to all metal components of the system
that routinely contain regulated substances and are in contact with an
electrolyte, to include soil or water. Owners and operators shall operate and
maintain corrosion protection systems in accordance with the current edition of
an industry standard or code of practice developed by a nationally recognized
association or independent testing laboratory approved in advance by the
department. Owners and operators shall use one or more of the following to
comply with the requirements of this section:
(1)
American Petroleum Institute
Publication 651, "Cathodic Protection of Aboveground Petroleum Storage
Tanks";
(2)
American Petroleum Institute Publication 652, "Linings of Aboveground
Petroleum Storage Tank Bottoms";
(3)
American Petroleum Institute
Publication 1632, "Cathodic Protection of Underground Petroleum Storage Tanks
and Piping Systems"
(4)
National Association of Corrosion Engineers Publication RP0193,
"External Cathodic Protection of On-Grade Carbon Steel Storage Tank
Bottoms";
(5)
National Association of Corrosion Engineers Publication SP0169,
"Standard Practice for Control of External Corrosion on Underground or
Submerged Metallic Piping Systems".
B. Owners and operators shall ensure that all
storage tank systems equipped with cathodic protection are inspected for proper
operation by a qualified corrosion expert in accordance with the following
requirements:
(1) Frequency: owners and
operators shall test all cathodic protection systems as follows:
(a) within six months of installation and at
least every three years thereafter;
(b) within six months of a modification or
repair; or
(c) another reasonable
time frame approved in advance in writing by the department;
(2) Inspection criteria: the
criteria that are used to determine that cathodic protection is adequate as
required by this section must be in accordance with the current edition of an
industry standard or code of practice developed by a nationally recognized
association or independent testing laboratory approved in advance by the
department;
(3) Owners and
operators of storage tank systems shall provide the department a report on the
cathodic protection system test that includes the following:
(a) name of facility, facility address, and
facility ID number issued by the department;
(b) name of the technician who performed the
test;
(c) certification of the
technician in the type of test performed, including certification numbers,
national association where the certification was obtained, and expiration date
of the certification;
(d)
description of cathodic protection system, for example impressed current,
galvanic;
(e) description of
storage tank system including tank ID number, product, capacity, tank type,
piping, flex connectors;
(f) type
of test conducted, such as: routine three-year test; test within six months of
installation; test within six months after repair or modification;
(g) whether all flex connectors or metal
risers that routinely contain a regulated substance and are in contact with an
electrolyte are protected from corrosion. If isolation boots, jackets, or other
non-corrodible materials are used to protect this equipment from corrosion, it
shall be determined if they are still providing protection from
corrosion.
(h) tester's pass/fail
evaluation and actions to be taken after evaluation;
(i) facility drawing of the storage tank
system and cathodic protection system, indicating location of test points on
the storage tank system, cathodic protection test stations, and reference
electrode placement; and
(j)
description of cathodic protection system repair or modification.
(4) Owners and operators of
storage tank systems shall provide the department a report on impressed current
systems that includes all requirements listed in 20.5.110.1016 NMAC; and
(a) rectifier manufacturer, model, serial
number, rated direct current output voltage and amperage;
(b) rectifier tap settings, direct current
output voltage and amperage, and hour meter reading;
(c) description of structure tested, contact
point of test lead, and reference electrode placement;
(d) structure to soil potential with current
applied in millivolts;
(e)
structure to soil potential with current interrupted, instant OFF in
millivolts;
(f) 100 millivolts
polarization shift, end voltage and voltage change; and
(g) test results.
(5) Owners and operators of storage tank
systems shall provide the department a report on galvanic systems that includes
all requirements listed in 20.5.110.1016 NMAC; and
(a) description of structure tested, contact
point of test lead, and reference electrode placement;
(b) structure to soil potential measured
locally in millivolts;
(c)
structure to soil potential measured remotely in millivolts; and
(d) test results.
(6) Owners and operators shall use one or
more of the following to comply with the requirements of this section:
(a)
National Fire Protection
Association Standard 30, "Flammable and Combustible Liquids
Code";
(b)
National Fire Protection Association Standard 30A "Code for Motor Fuel
Dispensing Facilities and Repair Garages";
(c)
American Petroleum Institute
Publication RP 1615, "Installation of Underground Petroleum Storage
Systems";
(d)
American Petroleum Institute Publication RP 1632, "Cathodic Protection
of Underground Petroleum Storage Tanks and Piping Systems";
(e)
International Code Council,
"International Fire Code";
(f)
NACE International Test Method TM
0101, "Measurement Techniques Related to Criteria for Cathodic Protection of
Underground Storage Tank Systems";
(g)
NACE International Test Method
TM0497, "Measurement Techniques Related to Criteria for Cathodic Protection on
Underground or Submerged Metallic Piping Systems";
(h)
Steel Tank Institute Recommended
Practice R051, "Cathodic Protection Testing Procedures for STI-P3®
USTs";
(i)
NACE
International Standard Practice SP 0285, "External Control of Underground
Storage Tank Systems by Cathodic Protection"; or
(j)
NACE International Standard
Practice SP 0169, "Control of External Corrosion on Underground or Submerged
Metallic Piping Systems".
C. Owners and operators shall inspect storage
tank systems with impressed current cathodic protection systems every 60 days
to ensure the equipment is running properly. Owners and operators shall record
the date, time, readings and results of each inspection in a log kept at the
facility, and indicate who performed each inspection.
D. Owners and operators shall monthly inspect
any equipment or materials used to isolate metal components of AST systems and
shall repair or replace equipment and materials used to meet corrosion
protection requirements in this section.
E. For storage tank systems using cathodic
protection, owners and operators shall maintain records of the operation of the
cathodic protection in accordance with 20.5.110.1015 NMAC to demonstrate
compliance with the performance standards in this section. These records shall
provide the following:
(1) the results of the
last three inspections required in Subsection C of this section; and
(2) the results of testing from the last two
inspections required in Subsection B of this section.
[The department provides an optional form that may be used
for the cathodic protection system test report required in Subsection B. The
form is available on the petroleum storage tank bureau's pages on the
department website, or by contacting the Petroleum Storage Tank Bureau at
505-476-4397 or 2905 Rodeo Park Drive East, Building 1, Santa Fe, New Mexico
87505.]
