17.3. ALTERNATE METHOD
17.3.1. If the preferred method outlined above is not practical,
an alternate method
(FIGURE 17-2)
is:
• Bury additional tanks in the same installation hole.
• Empty existing tanks to less than 1/4 capacity.
• Remove the surface slab.
• Enlarge the excavation for the new tanks, leaving as much
backfill as possible around existing tanks.
• Install shoring, if necessary, to make sure that existing tanks
do not move and sufficient backfill remains.
• Follow procedures and requirements outlined in this Installa-
tion Manual.
•
See SECTION 5 for excavation parameters.
FIGURE 17-2
18. OPERATING GUIDELINES
18.1. GENERAL
18.1.1. Owner must retain the Installation Manual and Operating
Guidelines for future reference to operating guidelines.
18.1.2. In addition to these installation instructions and operating
guidelines, follow all federal, state and local laws, regulations,
codes and safety precautions that pertain to underground
storage tanks and/or their associated systems.
18.1.3. Consult tank brochures, separate system instructions
(such as oil/water separators) and separate accessory
instructions, which are available upon request from the UST
coordinator at the Xerxes plant nearest you.
(See SECTION 20.)
18.1.4. Consult the applicable warranty for each tank for further
operating guidelines and limitations. A copy of the warranty is
available upon request from the UST coordinator at the Xerxes
plant nearest you.
(See SECTION 19.)
18.2. FILLING TANK
18.2.1. Never overfill the tank.
18.2.2. Xerxes recommends only gravity filling of tanks.
Xerxes does not recommend pump or pressure filling of
the tanks because an overfill or overpressurization could
occur. Overfilling the tank while under pressure could
cause tank failure even if the tank vent is unrestricted.
Tank failure could result in death or serious injury.
26
18.2.3. Each time the tank is filled, the owner/operator must
make sure the tank is properly vented.
(See SECTION 11.)
18.2.4. Owner/operator must determine whether the tank has
overfill protection, such as automatic shut-off devices (“flapper
valves”) or vent-restriction devices (“ball-float valves”), which will
close off the internal piping and reduce the tank’s capacity.
18.2.5. Owner/operator must notify whoever fills the tank that it
has overfill protection, which reduces the tank’s capacity.
18.2.6. Before each tank filling, owner/operator or the delivery
service must determine the tank’s reduced capacity due to the
overfill protection, and consult the instructions or guidelines
provided by the installer and manufacturer of the overfill-
protection device to determine how much additional product the
tank can hold.
If owner/operator allows pump or pressure filling of the
tank, owner/operator must ensure that the tank is not
equipped with overfill protection, such as an automatic
shut-off device or ball-float valve. Owner/operator must
notify whoever will fill the tank that automatic shut-off
equipment is required on the delivery truck to prevent an
overfill and that overfilling the tank while under pressure
could cause tank failure even if the tank vent is unrestrict-
ed. Failure to follow these instructions each time the tank is
filled could cause an overfill, overpressurization or tank
failure, and could result in death or serious injury.
18.3. ENTERING TANK
18.3.1. Do not allow anyone to enter the tank unless it has been
properly emptied and vented, and unless the person entering
the tank has been trained in confined-space entry procedures
and applicable OSHA regulations.
Improper tank entry could cause fire, explosion or asphyxi-
ation, and could result in death or serious injury.
19. LIMITED WARRANTIES
19.1. GENERAL
19.1.1. Each product is covered by product-specific limited
warranties, which contain operating guidelines and parameters
that should be reviewed as applicable. Copies of the limited
warranties are available upon request from the UST coordinator
at the plant nearest you.
20. SELECTED LIST OF SUPPLEMENTAL MATERIALS
20.1. GENERAL
20.1.1. Supplemental materials, which may apply to specific
installations and/or conditions, are available upon request from
the UST coordinator at the Xerxes plant nearest you or from
technical support at Xerxes Minneapolis, as applicable.
