Current through November 25, 2024
(1) GENERAL.
(a) Prior to delivery, the operator of the
fuel delivery equipment that is transferring the product shall ensure that the
volume available in the tank is greater than the volume of product to be
transferred to the tank.
(b) The
transfer operation shall be monitored constantly by the operator of the
delivery equipment so as to prevent overfilling and spilling.
(2) EQUIPMENT. All underground
storage tank systems, whether new or existing, shall meet all of the following
requirements except par. (a) 1. a. does not apply to containment that was
installed before February 1, 2009, and par. (a) 3. does not apply to
containment that was installed before November 1, 2019:
(a)
Spill prevention. A
liquid-tight containment basin that meets all of the following requirements
shall be provided on top of the tank, where connections are made for product
fill piping:
1.
a. The basin shall have a capacity of at
least five gallons.
b. The basin
shall be fabricated and installed in a manner that prevents release of liquids.
2. The basin shall be
equipped with either a drain system that directs spilled product into the tank
or a mechanism to pump product out of the basin.
3.
a. The
basin shall be tested for leaks hydrostatically at installation in accordance
with any manufacturer's instructions, and the adopted standard PEI RP 1200,
except as provided in subd. 3. b.
b. The testing in subd. 3. a. may be omitted
for a spill containment basin that has continuous electronic pressure, vacuum,
liquid-filled interstitial monitoring in addition to double-wall construction,
if the monitoring system is tested at installation to verify that it operates
in accordance with the manufacturer's specifications.
(b)
Overfill
prevention.
1. Overfill prevention
equipment shall be provided that will operate as follows unless approved
otherwise in writing by the department:
a.
Alert the transfer operator when the tank is no more than 90 percent full by
triggering an audible and visual high-level alarm.
b. Automatically shut off the flow of liquid
into the tank when the tank is no more than 95 percent full, if the tank uses
tight-connect delivery.
Note: Retrofit equipment is available which
complies with these requirements and which can be installed in a tank without
removing pavement. See PEI RP100 section 7.3.2 for description of how the
contents of the delivery hose can be drained into the tank after an automatic
shutoff valve closes.
2. Overfill prevention equipment shall be
tested before it is placed into service and annually to ensure it is set to
activate at the level specified in subd. 1. and that it will activate when the
contained liquid reaches that level. This testing shall be performed in
accordance with manufacturer's instructions and the adopted standard PEI RP
1200.
Note: API RP 1007 , Loading and
Unloading of MC 306/DOT 406 Cargo Tank Motor Vehicles, is a guideline
for use by truck drivers and other personnel that includes specific steps for
unloading tank trucks into underground and aboveground tanks in a safe and
efficient manner which protects the environment. It is available at
http://publications.api.org.
(3) MAINTENANCE.
(a) All new and existing spill and overfill
protection shall be maintained to perform as originally intended.
Note: Under s.
ATCP 93.585(2) (b), fuel-delivery persons
must immediately inform the owner or operator of any spilling or overfilling
which occurs during the delivery procedure and which may result in or be a
release. Requirements for the owner or operator to report, investigate and
clean up any spills and overfills are contained in ss.
ATCP 93.575 to 93.585.
(b)
1. All
new or existing spill-containment basins shall be tested for leaks at least
once every 3 years in accordance with one of the following methods:
a. Methods prescribed in sub. (6)
(d).
b. A code of practice
developed by a nationally recognized association or independent testing
laboratory.
c. Other method
approved by the department.
2. The testing in subd. 1. may be omitted for
a spill containment basin that has continuous electronic pressure, vacuum,
liquid-filled interstitial monitoring in addition to double-wall construction,
if the monitoring system is tested at installation to verify that it operates
in accordance with the manufacturer's specifications.
3. Spill-containment basin tightness testing
shall be performed by a person with no personal or monetary interest in the
facility and whose employer has no personal or monetary interest in the
facility.
4. Any spill-containment
basin with a tear, crack, or hole shall be replaced with equipment meeting the
criteria for new spill containment.
5. When a spill-containment basin replaced
under subd. 2. has an obvious or suspected release or when an initial basin is
installed on a preexisting tank on or after November 1, 2019, an assessment
shall be performed in accordance with ss.
ATCP 93.580 to 93.585.
Under section
ATCP 93.585(2) (b), fuel-delivery persons
must immediately inform the owner or operator of any spilling or overfilling
which occurs during the delivery procedure and which may result in or be a
release. Requirements for the owner or operator to report, investigate and
clean up any spills and overfills are contained in sections
ATCP 93.575 to 93.585.
