Environmental Code of Practice for Aboveground and ... - CCME

B.6.3.1
(2) When the leak detection device is not an
electrical device (such as a monitoring well
or statistical inventory reconciliation),
electrical interlocks may not be possible.
B.6.3.2 Even with the present mechanical type of
line-leak detectors, a line leak within a
submersible pump system can result in large
volumes of product being pumped into the
ground. Leaks from submersible pump
systems have been the cause of some of the
largest environmental and safety incidents.
Where line-leak detectors are used, they shall
not be bypassed when problems are
encountered while dispensing the product.
The authority having jurisdiction may choose
to prohibit the use of remote or submersible
pump systems unless the pipes and
pumps are within an acceptable secondary
containment system.
B.6.5.3 The soil shall consist of gravels, coarse or
medium sands, coarse silts, or other
permeable material.
B.6.5.8 A filter pack is a porous medium usually
consisting of sand or pea gravel.
B.6.5.13 Monitoring wells shall not be constructed of
Schedule 20 PVC “sewer” or leach field
piping.
B.6.7.2
(1) A mechanical line leak detector (MLLD) is
unable to reliably detect small leaks. From
the effective date of this Code and at the
discretion of the authority having
jurisdiction, an MMLD is not recognized as
a method of detecting leaks in pressurized
piping. Additional methods of leak detection
may be used, or alternatively, the MLLD can
be replaced by an electronic line leak
detector (ELLD).
Inventory control for a storage tank is a form
of inventory monitoring for motive fuel storage
tanks. However, inventory control by itself is
not an acceptable form of leak detection.
Inventory control combined with acceptable
statistical inventory reconciliation is an
acceptable form of leak detection for the entire
storage tank system.
An under-pump check valve is located
directly below the pump of a suction system
and is the only check valve installed on the
system. With continuous slope back to the
tank, a leak in the pipe will cause product to
drain into the tank.
B.7.3.4
(2)(b) Allows a field-erected storage tank to simply
follow the requirements of API Std 653-01,
“Tank Inspection, Repair, Alteration, and
Reconstruction.” Strict adherence to API Std
653-01, “Tank Inspection, Repair,
Alteration, and Reconstruction.” is required.
API Std 653-01, “Tank Inspection, Repair,
Alteration, and Reconstruction.” requires
periodic corrosion monitoring. Once a
corrosion rate is established, subsequent
corrosion monitoring and repairs to the tank
bottom can be performed prior to the
occurrence of any perforations. If
perforations do occur, it can be assumed that
the provisions of API Std 653-01, “Tank
Inspection, Repair, Alteration, and
Reconstruction.” have not been strictly
followed. If this occurs, stronger preventive
steps are specified.
B.8.3.2
(1)(a) To facilitate early detection of leakage from
an underground storage tank system, proper
inventory records must be developed,
maintained, and reviewed continuously for
any developing trends that may signify a
loss of product. The traditional method of
doing this has been to “dip” the storage
tanks. Dipping is the actual measurement of
the liquid contents of the storage tank with a
graduated stick (dip stick). This
measurement combined with the storage
tank chart (suitable for use with the specific
tank) can be converted to the liquid volume
of the storage tank. A measuring device
(generally a recording type of pump) that
will measure the amount of product
Environmental Code of Practice for Aboveground and Underground Storage Tank Systems Containing Petroleum and Allied Petroleum Products 46