Current through Register Vol. 48, No. 38, September 20, 2024
a) All containment
sumps must consist of a factory manufactured containment that is liquid-tight
on its sides, bottom and at any penetrations and is compatible with the
substance conveyed by the piping. Such containment shall also have a factory
manufactured protective cover and supporting components that are properly
maintained. If the protective cover or its supporting components are cracked,
deteriorated or missing, the cover and supporting components that are defective
shall be replaced.
b) On or after
May 1, 2003, a submersible containment sump must be installed at the tank on
all new tanks with submersible pumps or American suction piping systems.
European suction piping systems are not required to have this
containment.
c) When an existing
submersible pump is removed and replaced with another submersible pump, or when
piping, flex connectors or other transitional components at the submersible
pump are replaced, a submersible containment sump must be installed.
d) On or after May 1, 2003, under-dispenser
containment must be installed on all new dispenser installations where there
previously was no dispenser. European suction systems are not exempt from the
requirement for under-dispenser containment. Under-dispenser containment must
allow for visual inspection and access to the components in the containment
system or be monitored every 30 days for leaks from the dispenser
system.
e) Under-dispenser
containment shall be required when:
1) Both
the dispenser and the equipment needed to connect the dispenser to the
underground storage tank system are installed at a UST facility. The equipment
necessary to connect the dispenser to the underground storage tank system
includes check valves, shear valves, unburied risers or flexible connectors, or
other transitional components that are underneath the dispenser and connect the
dispenser to the underground piping; or
2) Work is being done to replace or modify
any components at or below the shear valve, regardless of whether the dispenser
is replaced.
f) On or
after October 13, 2028, containment sumps shall be installed where no sump
currently exists.
g) If more than
20 feet or 50% of a pipe run is replaced, the appropriate containment required
to make the associated interstitial monitoring functional (e.g., a tank
containment sump, under-dispenser containment, or a junction sump) shall also
be installed.
h) Water in Sumps
1) Sumps Without Interstitial Monitoring
Sensors. If water is in a sump and it is in contact with bare metal piping or
metal, including flex connectors, then corrosion protection, using impressed
current, spike anodes, or wristband anodes with proper electrolyte, must be
installed on the metal piping in accordance with Section
175.510. On or after October 13,
2028, cathodic protection in sumps shall be removed, as sumps must be
maintained clean and dry as of that date.
2) Sumps with Interstitial Monitoring
Sensors. Water that could interfere with the operation of double-wall
interstitial monitoring systems or that is in contact with bare metal piping or
metal, including flex connectors, shall be permanently removed and the source
of ingress repaired. The sump shall be maintained so that, other than internal
condensation, there is no water in contact with bare metal.
3) Requirement for All Sumps. In all cases,
sumps shall be maintained and repaired using petroleum compatible materials as
necessary so that, in the event of a release, product will not be leaked out of
sumps via cracks, broken seals or other openings. On or after October 13, 2028,
all sumps shall be maintained clean and dry.
i) Ban on Field-installed Spray-on or Pour-on
Materials in UST Containment Sumps. All required containments shall be factory
manufactured containments resistant to petroleum and chemical products.
Field-applied spray-on or pour-on materials shall not be used in UST
containment sumps. All repairs shall be made according to manufacturer's
specifications. The application of any material shall not interfere with the
normal operation of the shear valves or fusible links, or any equipment
installed under dispensers or submersible pumps.
j) A hydrostatic or other
manufacturer-required equivalent test will be performed on all containment sump
installations and immediately after repairs (including all submersible, piping,
transition and fill sumps, whether single-walled or double-walled) as follows:
1) All penetrations, including electrical,
must be completed prior to testing.
2) Piping containment sumps are to be filled
with water to a height that covers the highest penetration or sidewall seam by
4 inches.
3) Fill sumps (spill
buckets) shall be filled to within 11/2 inches of the top of the
sump.
4) Minimal backfilling that
may be necessary for support of the containment sump is allowed prior to the
test.
5) Test duration is 30
minutes and performed under PAI Time and Date Certain requirements with no drop
in water level of more than 1/8 inch.
k) All testing required by this Section shall
be performed:
1) By an OSFM-licensed
contractor that has licensure in the installation/retrofitting or inspection
and testing of UST equipment module; and
2) Using an employee of the OSFM-licensed
contractor for testing who is certified in the installation-retrofitting or
inspection and testing of UST equipment module.
l) Owners and operators of UST systems with
containment sumps used for interstitial monitoring of piping must meet these
requirements for periodic testing and shall ensure the equipment is operating
properly and will prevent releases to the environment by meeting one of the
following:
1) The containment sumps used for
interstitial monitoring of piping are tested at least once every three years to
ensure the equipment is liquid-tight by using vacuum, pressure or liquid
testing in accordance with one of the following criteria:
A) Requirements developed by the manufacturer
of the containment sump. Owners and operators may use this option only if the
manufacturer has developed testing requirements;
B) Requirements developed by the manufacturer
of the testing equipment; or
C) A
hydrostatic test that meets the requirements of subsection (j); or
2) A triennial alternative test
procedure for containment sumps with sensors is allowed subject to the
following requirements.
A) This alternative
test procedure shall be conducted as follows:
i) Sumps shall be inspected and must be free
of debris and liquids and obvious structural damage prior to testing;
ii) A liquid level sensor is mounted at the
lowest point in the sump and a periodic test is performed by adding liquid to a
point that will ensure activation of the sensor;
iii) The submersible pump automatically shuts
off when liquid activates the sensor; and
iv) The level of liquid and type of liquid
used to ensure activation of the sensor conforms to the sensor manufacturer's
specifications.
B)
Written documentation from the manufacturer detailing the minimum amount of
liquid and the type of testing liquid required to activate the sensor must be
provided when OSFM requests it.
C)
The following conditions shall disqualify sumps from this testing method:
i) Sensors found to be raised out of the
required position for proper activation shall trigger an NOV requiring
hydrostatic testing above the highest penetration or seam for the containment
sump in question, if the containment sump has been tested using the alternative
test procedure in this subsection (l)(3); and
ii) Those sumps with obvious structural
damage, such as cracks or breaks in the walls or floor of the containment sump,
shall require repair or replacement. Containment sumps shall be tested pursuant
to subsection (j) following repair or replacement of sump.
F) Containment sumps shall be inspected prior
to testing. Sumps must be free of debris and moisture prior to testing, and
those sumps with obvious structural damage, such as cracks or breaks in the
walls or floor of the containment sump, shall require repair or replacement.
Containment sumps shall be tested pursuant to subsection (j) following repair
or replacement of the sump.
m) Owners and operators must begin meeting
the requirements for testing in subsection (l) as follows:
1) For UST systems in use on or before
October 13, 2015, the initial testing for containment sumps used for
interstitial monitoring of piping must be conducted not later than October 13,
2018.
2) For UST systems brought
into use after October 13, 2015, these requirements apply at
installation.
n) Owners
and operators must maintain the following records for containment sumps used
for interstitial monitoring of piping:
1) All
records of installation shall be maintained for the life of the equipment;
and
2) All records of testing must
be maintained for three years.
