Current through August 26, 2024
(1)
(a) All aboveground storage tanks, whether
new or existing, shall have a means of overfill prevention which consists of
either a visual gauge, an audible or visual alarm, or a pump shutdown that
activates at 90 percent of the tank's capacity, and which complies with any
other applicable requirements in this section.
(b) Prior to delivery, the operator of the
product 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.
(2) The transfer operation shall be monitored
constantly by the operator of the delivery equipment so as to prevent
overfilling and spilling.
(3)
Equipment shall be clearly marked so visual and audible warning signals are
recognizable to the delivery person.
(4) Spill and overflow prevention equipment
shall be maintained to work as originally designed and installed.
(5) The fill opening shall be separate from
the vent opening.
(6)
(a) All aboveground storage tanks, whether
new or existing, with the fill point not located within a diked area shall be
provided with a catch basin or similar containment, except for tanks exempted
by par. (d) and tanks that are exempted from secondary containment by s.
ATCP 93.420(1) (a) to
(c).
(b) The catch basin or similar containment to
contain spillage at the fill point shall have a minimum liquid capacity of 5
gallons, except where the catch basin or similar containment was installed
before February 1, 2009.
(c) The
basin shall be equipped with a method to remove product or a drain system that
directs spilled product into the tank.
(d) The following tanks are exempt from par.
(a) :
1. Tanks provided with controls before
February 1, 2009, that comply with this subsection.
2. Tanks filled with a manual-shutoff nozzle
without a latch-open device.
Note: The "controls" referred to in this
subdivision may be something other than a mechanical device. In other words,
they are anything that will reliably prevent a loss of product at the fill
point from reaching the environment.
3. Tanks filled with a tight-connect with
either a dry break connection or a manual shutoff valve on the hose-end
connection.
(7)
Aboveground tanks that are filled via handheld nozzles shall be constantly
attended during product delivery and shall be provided with overfill prevention
equipment which notifies the person filling the tank, with either an audible or
a visual signal that the liquid level has reached 90 percent of the tank's
capacity.
(8) Tanks located remote
from the fill point, that are filled only with a manual shutoff nozzle without
a latching mechanism shall be provided with overfill prevention equipment which
notifies the person filling the tank, with both an audible and a visual signal,
that the liquid level has reached 90 percent of the tank's capacity.
(9)
(a) Any
of the following new aboveground double-wall tanks storing Class IIIB products
shall be provided with overfill prevention equipment which notifies the person
filling the tank, with both an audible and a visual signal, that the liquid
level has reached 90 percent of the tank's capacity:
1. Tanks using tight-connect
delivery.
2. Tanks located remote
from the fill point.
(b)
Any of the following existing aboveground double-wall tanks storing Class IIIB
products shall be provided with overfill prevention equipment which notifies
the person filling the tank, with both an audible and a visual signal, that the
liquid level has reached 90 percent of the tank's capacity:
1. Tanks using tight-connect
delivery.
2. Tanks located remote
from the fill point that use delivery nozzles with latch-open
devices.
(10)
(a) Any of the following double-wall
aboveground tanks that are installed on or after November 1, 2019, shall be
provided with overfill prevention equipment which notifies the person filling
the tank, with both an audible and a visual signal, that the liquid level has
reached 90 percent of the tank's capacity, and which automatically shuts off
flow when the quantity of liquid in the tank reaches 95 percent of the tank's
capacity, except this requirement does not apply to the tanks addressed in sub.
(9) (a):
1. Tanks using tight-connect
delivery.
2. Tanks located remote
from the fill point that use delivery nozzles with latch-open
devices.
(b) Any of the
following existing aboveground double-wall tanks shall be provided with
overfill prevention equipment which notifies the person filling the tank, with
both an audible and a visual signal, that the liquid level has reached 90
percent of the tank's capacity, and which automatically shuts off flow when the
quantity of liquid in the tank reaches 95 percent of the tank's capacity,
except this requirement does not apply to the tanks addressed in sub. (9) (b):
1. Tanks using tight-connect
delivery.
2. Tanks located remote
from the fill point that use delivery nozzles with latch-open
devices.
(11)
Any single-wall aboveground tank which is not addressed in subch. III and which
either is existing by November 1, 2019, or is installed on or after that date
shall be provided with overfill prevention equipment which notifies the person
filling the tank, with both an audible and a visual signal, that the liquid
level has reached 90 percent of the tank's capacity.
(12) Overfill prevention equipment shall be
tested before it is placed into service to ensure it is set to activate at the
levels specified in this section and that it will activate when the contained
liquid reaches those levels. This testing shall be performed in accordance with
one of the following:
(a) Requirements
developed by the manufacturer, if the manufacturer has developed testing
requirements.
(b) An approved
standard developed by a nationally recognized association or independent
testing laboratory.
(c)
Requirements determined by the department to be no less protective of human
health and the environment than the requirements listed in this
subsection.
(13)
(a) Operators shall utilize the procedures
and equipment as specified in PEI RP600 for preventing overfilling of new and
existing shop-built aboveground tanks.
(b) Fuel-delivery persons shall utilize the
procedures in PEI RP600 for preventing overfilling of new and existing
shop-built aboveground tanks, and may not interfere with equipment that is
intended to prevent overfilling.
Note: PEI RP600 does not mandate installation
of equipment, but instead addresses how to effectively use the equipment that
is provided, as required by other sections and referenced standards in this
chapter.
Note: Under ss.
ATCP 93.470 and
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.
Note: Overfill-prevention requirements for
bulk plant tanks are in PEI RP800, and corresponding requirements for hazardous
liquid tanks containing substances that are not flammable or combustible are in
s.
ATCP 93.350.
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
aboveground and underground tanks in a safe and efficient manner which protects
the environment. It is available at http://publications.api.org.
