United States
Environmental Protection
Agency
Solid Waste And
Emergency Response
5403G
EPA510-B-97-007
September 1997
&EPA Straight Talk On Tanks
Leak Detection Methods For
Petroleum Underground Storage
Tanks And Piping
nventory Control or
Manual Tank Gauging
Inventory Probe for
Automatic Tank Gauging
Printed on Recycled Paper
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Contents
Do You Have Questions About Leak Detection? 1
An Overview Of Leak Detection Requirements 2
Secondary Containment With Interstitial Monitoring 6
Automatic Tank Gauging Systems 8
Vapor Monitoring 10
Groundwater Monitoring 12
Statistical Inventory Reconciliation 14
Tank Tightness Testing With Inventory Control 16
Manual Tank Gauging 20
Leak Detection For Underground Piping 22
Publications And Videos About USTs 26
State Contacts For UST Information 28
Free Publications About UST Requirements
You can go to EPA's UST Web site at
http://www.epa.gov/OUST/ to order or read
documents online. You can call EPA's toll-free
RCRA/Superfund Hotline at 800 424-9346 and order
up to 30 free copies of any title. Or you can write
and ask for titles by addressing your request to
NCEPI, our publication distributor: NCEPI, Box 42419,
Cincinnati, OH 45242. Or you can make your request
by calling NCEPI's toll-free number at 800 490-9198.
Or you can fax your order to NCEPI at 513 891 -6685.
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Do You Have Questions About Leak Detection?
As an owner or operator of underground storage tanks (USTs) storing
petroleum:
# Do you understand the basic leak detection requirements for USTs?
# Do you need help choosing the best leak detection method for your
USTs?
These are important questions, because your UST and its underground
piping must have leak detection NOW.
This booklet begins with an overview of the federal regulatory requirements
for leak detection. Each following section focuses on one leak detection
method or the special requirements for piping.
You will find answers in this booklet to many basic questions about how leak
detection methods work and which methods are best for your UST site.
Why is leak detection so important?
As of March 1997, almost 330,000 UST leaks had been confirmed.
At sites without leak detection, leaks were discovered late, after
contamination had spread, requiring difficult and costly cleanups.
By contrast, if you have effective leak detection, you can respond quickly to
signs of leaks. You can minimize the extent of environmental damage and
the threat to human health and safety. Early action on your part also protects
you from the high costs that can result from cleaning up extensive leaks and
responding to third-party liability claims.
If you need an overview of all the federal requirements for USTs, please refer
to Musts For USTs, a booklet developed by the U.S. Environmental
Protection Agency (EPA). You can order a free copy of this booklet by calling
EPA's toll-free Hotline at 800 424-9346 (see inside the front cover for full
ordering information).
If your USTs do not
meet the leak
detection
requirements
described in this
booklet, you can be
cited for violations
and fined.
ftEPA Musts For USTs
A Summary Of Federal
Regulations For Underground
Storage Tank Systems
Straight Talk On Tanks 1
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State or local
regulations may differ
from the federal
requirements, so find
out which
requirements apply to
your UST. See the list
of state UST contacts
starting on page 28.
An Overview Of Leak Detection Requirements
All new USTs (those installed after December 1988) must have leak
detection when they are installed.
USTs installed before December 1988 (called "existing USTs") had
compliance deadlines for leak detection phased in over 5 years.
By December 1993, all "existing USTs" had to have leak detection.
EPA has identified the following methods that owners and operators may use
to meet the federal leak detection requirements:
# Secondary Containment With Interstitial Monitoring
# Automatic Tank Gauging Systems
# Vapor Monitoring
# Groundwater Monitoring
# Statistical Inventory Reconciliation
# Other Methods Meeting Performance Standards
The leak detection methods noted above are all monthly monitoring
methods and eventually everyone must use at least one of them. However,
as a temporary method, you can combine tank tightness testing with
inventory control (or with manual tank gauging if you have a small tank), as
explained on page 4.
Underground piping connected to your USTs must also have leak
detection. See pages 22-25 for descriptions of the requirements for piping.
Brief descriptions of leak detection methods appear on the
next two pages. More complete descriptions appear in the
following sections.
Straight Talk On Tanks 2
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# Secondary Containment With Interstitial Monitoring (see pages 6-7)
Secondary containment often uses a barrier, an outer wall, a vault, or a
liner around the LIST or piping. Tanks can be equipped with inner
bladders that provide secondary containment. Leaked product from the
inner tank or piping is directed towards an "interstitial" monitor located
between the inner tank or piping and the outer barrier. Interstitial
monitoring methods range from a simple dipstick to a continuous,
automated vapor or liquid sensor permanently installed in the system.
# Automatic Tank Gauging Systems (see pages 8-9)
A probe permanently installed in the tank is wired to a monitor to provide
information on product level and temperature. These systems
automatically calculate the changes in product volume that can indicate a
leaking tank.
# Vapor Monitoring (see pages 10-11)
Vapor monitoring measures product "fumes" in the soil around the LIST to
check for a leak. This method requires installation of carefully placed
monitoring wells. Vapor monitoring can be performed manually on a
periodic basis or continuously using permanently installed equipment.
# Groundwater Monitoring (see pages 12-13)
Groundwater monitoring senses the presence of liquid product floating on
the groundwater. This method requires installation of monitoring wells at
strategic locations in the ground near the tank and along the piping runs.
To discover if leaked product has reached groundwater, these wells can
be checked periodically by hand or continuously with permanently installed
equipment. This method cannot be used at sites where groundwater is
more than 20 feet below the surface.
# Statistical Inventory Reconciliation (see pages 14-15)
In this method, a trained professional uses sophisticated computer
software to conduct a statistical analysis of inventory, delivery, and
dispensing data, which you must supply regularly.
# Other Methods Meeting Performance Standards
Any technology can be used if it meets a performance standard of
detecting a leak of 0.2 gallons per hour with a probability of detection of at
least 95 percent and a probability of false alarm of no more than 5
percent. Regulatory authorities can approve another method if you
demonstrate that it works as well as one of the methods above and you
comply with any condition the authority imposes.
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Straight Talk On Tanks 3
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Make sure the vendor
of the leak detection
method you use has
provided you with
evidence that your
leak detection meets
regulatory
requirements for
performance.
# Tank Tightness Testing With Inventory Control (see pages 16-19)
This method combines periodic tank tightness testing with monthly
inventory control. Inventory control involves taking measurements of tank
contents and recording amount pumped each operating day, as well as
reconciling all this data at least once a month. This combined method
must also include tightness tests, which are sophisticated tests performed
by trained professionals. This combined method can be used only
temporarily (usually for 10 years or less)—see page 19 for time
restrictions.
# Manual Tank Gauging (see pages 20-21)
Manual tank gauging can be used only for tanks of 2,000 gallons or less
capacity. This method requires keeping the tank undisturbed for at least
36 hours each week, during which the contents of the tank are measured
twice at the beginning and twice at the end of the test period. At the end
of each week you compare the results to the standards shown on page 21
to see if your tank may be leaking. This method can be used by itself only
for tanks up to 1,000 gallons. Tanks between 1,001 and 2,000 gallons can
use this method only in combination with periodic tank tightness testing.
This combined method can be used only temporarily (usually for 10
years or less)—see page 21 for time restrictions.
Look For The "Proof" Of A Third-Party Evaluation
An evaluation performed by a third party (someone who is independent of the
manufacturer or vendor of the leak detection system) shows that a leak
detection system can work as designed. The evaluation follows required
evaluation procedures, and often takes place in a laboratory. EPA and third
parties have developed evaluation procedures for all leak detection systems.
Although an evaluation and its resulting documentation are technical, you
should be familiar with the evaluation's "results" form and, when provided, its
"description" form. You should obtain these forms from the leak detection
vendor and keep them on file. They contain a signed certification that the
system performed as described, as well as documenting any limitations of the
system. This information is important to your compliance with the LIST
requirements. For example, if a tank tightness test was evaluated and
certified only for tests taking 2 hours or more, then your LIST must be tested
for at least 2 hours or it would fail to meet the leak detection requirements.
Straight Talk On Tanks 4
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Required "Probabilities" For Some Leak Detection
The regulations require not only that leak detection methods be able to detect
certain leak rates, but that they also give the correct answer consistently. In
general, methods must detect the specified leak rate with a probability of
detection of at least 95 percent and a probability of false alarm of no more
than 5 percent. Simply stated, this means that, of 100 tests of USTs leaking
at the specified rate, at least 95 of them must be correctly detected. It also
means that, of 100 tests of non-leaking USTs, no more than 5 can be
incorrectly called leaking. This is what is meant by the "probabilities" noted in
this booklet.
Which leak detection method is best for you?
There is no one leak detection system that is best for all sites, nor is there a
particular type of leak detection that is consistently the least expensive.
Each leak detection method has unique characteristics. For example, vapor
detection devices work rapidly and most effectively in porous soils, while
liquid detectors are only appropriate for areas with
a high water table.
Identifying the best leak detection choice for your LIST depends on
a number of factors including cost (both initial installation cost and
long-term operation and maintenance cost), facility configuration
(such as complexity of piping runs and manifolded tanks), groundwater
depth, soil type, seasonal rainfall and temperature ranges, availability of
experienced installers, and other variables.
You should look around extensively for experienced, professional vendors
and installers of leak detection. Ask questions that help you find the most
reliable, cost-effective leak detection for your type of facility. Some possible
information sources are: references from fellow LIST owners, oil marketers,
equipment suppliers, trade journals, trade associations, state and local trade
associations (especially those for petroleum marketers and LIST owners), and
state and local regulatory authorities. (See the list of state LIST contacts
starting on page 28.)
Your state may also have an assistance fund that may be able to help you pay
for your UST's leak detection.
EPA provides a free publication—List Of Leak Detection Evaluations For
LIST Systems—that contains a detailed summary of specifications, based on
third-party evaluations, for over 250 leak detection systems. (See inside the
front cover for ordering information.) Although the List can be used to help
select systems and determine their compliance or acceptability, the publication
is not a list of "approved" leak detection systems. Approval or acceptance of
leak detection systems rests with the implementing agency, in most cases the
state environmental agency.
For additional information about federal LIST requirements, contact EPA's
RCRA/Superfund Hotline at 800 424-9346.
Some states
maintain lists of
those leak detection
systems that have
been evaluated by
third parties. Check
with your state to
see which systems
are allowed in your
state. See list of
state contacts
starting on page 28.
Straight Talk On Tanks 5
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Secondary Containment With Interstitial Monitoring
Will you be in compliance?
When installed and operated according to the manufacturer's specifications,
secondary containment with interstitial monitoring meets the federal leak
detection requirements for USTs. Operation of the monitoring device at least
once each month fulfills the requirements for the life of the tank. Secondary
containment with interstitial monitoring can also be used to detect leaks from
piping (see the section on leak detection for piping starting on page 22).
How does the leak detection method work?
Secondary containment
# Secondary containment provides a barrier between the tank and the
environment. The barrier holds the leak between the tank and the barrier
so that the leak is detected. The barrier is shaped so that a leak will be
directed towards the interstitial monitor.
# Barriers include:
>• Double-walled or "jacketed" tanks, in which an outer wall partially or
completely surrounds the primary tank;
- Internally fitted liners ("bladders"); and
- Leakproof excavation liners that partially or completely surround the
tank.
# Clay and other earthen materials cannot be used as barriers.
Interstitial monitors
# Monitors are used to check the area between the tank and the barrier for
leaks and alert the operator if a leak is suspected.
# Some monitors indicate the physical presence of the leaked product,
either liquid or gaseous. Other monitors check for a change in condition
that indicates a hole in the tank, such as a loss of vacuum or a change in
the level of a monitoring liquid between the walls of a double-walled tank.
# Monitors can be as simple as a dipstick used at the lowest point of the
containment to see if liquid product has leaked and pooled there.
Monitors can also be sophisticated automated systems that continuously
check for leaks.
Straight Talk On Tanks 6
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What are the regulatory requirements?
# The barrier must be immediately around or beneath the tank.
# The interstitial monitor must be checked at least once every 30 days.
# A double-walled system must be able to detect a release through the inner
wall.
# An excavation liner must:
> Direct a leak towards the monitor;
> Not allow the specific product being stored to pass through it any faster than
10"6 cm/sec;
«• Be compatible with the product stored in the tank;
«• Not interfere with the UST's cathodic protection;
«• Not be disabled by moisture;
«• Always be above the groundwater and the 25-year flood plain; and
«• Have clearly marked and secured monitoring wells, if they are used.
# A bladder must be compatible with the product stored and must be
equipped with an automatic monitoring device.
Will it work at your site?
# In areas with high groundwater or a lot of rainfall, it may be necessary to
select a secondary containment system that completely surrounds the
tank to prevent moisture from interfering with the monitor.
Anything else you should consider?
# This method works effectively only if the barrier and the interstitial monitor
are installed correctly. Therefore, trained and experienced installers are
necessary.
Find out if there are
state or local
requirements on the
use of secondary
containment that
differ from those
described here.
Straight Talk On Tanks 7
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Automatic Tank Gauging Systems
Water Level f
Float
Will you be in compliance?
When installed and operated according to the manufacturer's specifications,
automatic tank gauging systems (ATGS) meet the federal leak detection
requirements for tanks (this method does not detect piping leaks). A test
performed each month fulfills the requirements for the life of the tank. (For
additional requirements for piping, see the section on leak detection for piping
starting on page 22.)
How does the leak detection method work?
# The product level and temperature in a tank are measured continuously
and automatically analyzed and recorded by a computer.
# In the "inventory mode," the ATGS replaces the use of the gauge stick to
measure product level and perform inventory control. This mode records
the activities of an in-service tank, including deliveries.
# In the "test mode," the tank is taken out of service and the product level
and temperature are measured for at least one hour. Some systems,
known as "continuous ATGS," do not require the tank to be taken out of
service to perform a test. This is because these systems can gather and
analyze data during many short periods when no product is being added
to or taken from the tank.
# Some methods combine aspects of automatic tank gauges with statistical
inventory reconciliation. See pages 14-15 for more information about
these methods
What are the regulatory requirements?
# The ATGS must be able to detect a leak of 0.2 gallons per hour with
certain probabilities of detection and of false alarm. Some ATGS can also
detect a leak of 0.1 gallons per hour with the required probabilities.
Will it work at your site?
# ATGS have been used primarily on tanks containing gasoline or diesel,
with a capacity of up to 15,000 gallons. If considering using an ATGS for
larger tanks or products other than gasoline or diesel, discuss its
applicability with the manufacturer's representative.
# Water around a tank may hide a leak by temporarily preventing the
product from leaving the tank. To detect a leak in this situation, the ATGS
should be capable of detecting water in the bottom of a tank.
Straight Talk On Tanks 8
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Anything else you should consider?
# The ATGS probe is permanently installed through an opening (not the fill
pipe) on the top of the tank. Each tank at a site must be equipped with a
separate probe.
# The ATGS probe is connected to a console that displays ongoing product
level information and the results of the monthly test. Printers can be
connected to the console to record this information.
# ATGS are often equipped with alarms for high and low product level, high
water level, and theft.
# ATGS can be linked with computers at other locations, from which the
system can be programmed or read.
# For ATGS that are not of the "continuous" type, no product should be
delivered to the tank or withdrawn from it for at least 6 hours before the
monthly test or during the test (which generally takes 1 to 6 hours).
# An ATGS can be programmed to perform a test more often than once per
month (a recommended practice).
Find out if there are
state or local
requirements on the
use of ATGS that
differ from those
described here.
Straight Talk On Tanks 9
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Vapor Monitoring
Will you be in compliance?
When installed and operated according to the manufacturer's instructions,
vapor monitoring meets the federal leak detection requirements for USTs.
Operation of a vapor monitoring system
at least once each month fulfills the requirements for the life of the tank.
Vapor monitoring can also be installed to detect leaks from piping
(see the section on leak detection for piping starting on page 22).
How does the leak detection method work?
# Vapor monitoring senses or measures "fumes" from leaked product in the
soil around the tank to determine if the tank is leaking.
# Fully automated vapor monitoring systems have permanently installed
equipment to continuously or periodically gather and analyze vapor
samples and respond to a release with a visual or audible alarm.
# Manually operated vapor monitoring systems range from equipment that
immediately analyzes a gathered vapor sample to devices that gather a
sample that must be sent to a laboratory for analysis. Manual systems
must be used at least once a month to monitor a site.
# All vapor monitoring devices should be periodically calibrated according to
the manufacturer's instructions to ensure that they are properly
responding.
# Before installation, a site assessment is necessary to determine the soil
type, groundwater depth and flow direction, and the general geology of the
site. This can only be done by a trained professional.
# The number of wells and their placement is very important. Only an
experienced contractor can properly design and construct an effective
monitoring well system. Vapor monitoring requires the installation of
monitoring wells within the tank backfill. A minimum of two wells is
recommended for a single tank excavation. Three or more wells are
recommended for an excavation with two or more tanks. Some state and
local agencies have developed regulations for monitoring well placement.
Straight Talk On Tanks 10
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What are the regulatory requirements?
# The LIST backfill must be sand, gravel or another material that will allow
the vapors to easily move to the monitor.
# The backfill should be clean enough that previous contamination does not
interfere with the detection of a current leak.
# The substance stored in the LIST must vaporize easily so that the vapor
monitor can detect a release. Some vapor monitoring systems do not
work well with diesel fuel.
# High groundwater, excessive rain, or other sources of moisture must not
interfere with the operation of vapor monitoring for more than
30 consecutive days.
# Monitoring wells must be secured and clearly marked.
Will it work at your site?
# Before installing a vapor monitoring system, a site assessment must be
done to determine whether vapor monitoring is appropriate at the site. A
site assessment usually includes at least a determination of the
groundwater level, background contamination, stored product type, and
soil type. This assessment can only be done by a trained professional.
Find out if there are
state or local
requirements on the
use of vapor
monitoring that
differ from those
described here.
Straight Talk On Tanks 11
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Groundwater Monitoring
NOTE:
Groundwater
monitoring cannot
be used at sites
where groundwater
is more than
20 feet below
the surface.
Will you be in compliance?
When installed and operated according to the manufacturer's instructions, a
groundwater monitoring system meets the federal leak detection
requirements for USTs. Operation of a groundwater monitoring system at
least once each month fulfills the requirements for the life of a tank.
Groundwater monitoring can also be used to detect leaks in piping (see the
section on leak detection for piping starting on page 22).
How does the leak detection method work?
# Groundwater monitoring involves the use of permanent monitoring wells
placed close to the LIST. The wells are checked at least monthly for the
presence of product that has leaked from the LIST and is floating on the
groundwater surface.
# The two main components of a groundwater monitoring system are the
monitoring well (typically a well of 2-4 inches in diameter) and the
monitoring device.
# Detection devices may be permanently installed in the well for automatic,
continuous measurements for leaked product.
# Detection devices are also available in manual form. Manual devices
range from a bailer (used to collect a liquid sample for visual inspection) to
a device that can be inserted into the well to electronically indicate the
presence of leaked product. Manual devices must be used at least once
a month.
# Before installation, a site assessment is necessary to determine the soil
type, groundwater depth and flow direction, and the general geology of the
site. This assessment can only be done by a trained professional.
# The number of wells and their placement is very important. Only an
experienced contractor can properly design and construct an effective
monitoring well system. A minimum of two wells is recommended for a
single tank excavation. Three or more wells are recommended for an
excavation with two or more tanks. Some state and local agencies have
developed regulations for monitoring well placement.
Straight Talk On Tanks 12
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What are the regulatory requirements?
# Groundwater monitoring can only be used if the stored substance does
not easily mix with water and floats on top of water.
# If groundwater monitoring is to be the sole method of leak detection, the
groundwater must not be more than 20 feet below the surface, and the
soil between the well and the LIST must be sand, gravel or other coarse
materials.
# Product detection devices must be able to detect one-eighth inch or less
of leaked product on top of the groundwater.
# Monitoring wells must be properly designed and sealed to keep then from
becoming contaminated from outside sources. The wells must also be
clearly marked and secured.
# Wells should be placed in the LIST backfill so that they can detect a leak
as quickly as possible.
Will it work at your site?
# In general, groundwater monitoring works best at LIST sites where:
«• Monitoring wells are installed in the tank backfill; and
•• There are no previous releases of product that would falsely indicate a
current release.
# A professionally conducted site assessment is critical for determining
these site-specific conditions.
Find out if there are
state or local
requirements on the
use of groundwater
monitoring that
differ from those
described here.
Straight Talk On Tanks 13
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Statistical Inventory Reconciliation
Will you be in compliance?
Statistical inventory reconciliation (SIR), when performed according to the
vendor's specifications, meets federal leak detection requirements for USTs as
follows. SIR with a 0.2 gallon per hour leak detection capability meets the
federal requirements for monthly monitoring for the life of the tank and piping.
SIR with a 0.1 gallon per hour leak detection capability meets the federal
requirements as an equivalent to tank tightness testing. SIR can, if it has the
capability of detecting even smaller leaks, meet the federal requirements for
line tightness testing as well. (For additional requirements for piping, see the
section on leak detection for piping starting on page 22.)
How does the leak detection method work?
You can order a
free booklet,
Introduction To
Statistical
Reconciliation, that
describes the use of
this method. See
inside the front
cover for ordering
information.
# SIR analyzes inventory, delivery, and dispensing data collected over a
period of time to determine whether or not a tank system is leaking.
# Each operating day, the product level is measured using a gauge stick or
other tank level monitor. You also keep complete records of all withdrawals
from the LIST and all deliveries to the LIST. After data have been collected
for the period of time required by the SIR vendor, you provide the data to
the SIR vendor.
# The SIR vendor uses sophisticated computer software to conduct a
statistical analysis of the data to determine whether or not your LIST system
may be leaking. The SIR vendor provides you with a test report of the
analysis.
# Some methods combine aspects of automatic tank gauges with statistical
inventory reconciliation. In these methods, sometimes called hybrid
methods, a gauge provides liquid level and temperature data to a computer
running SIR software, which performs the analysis to detect leaks.
What are the regulatory requirements?
# To be allowable as monthly monitoring, a SIR method must be able to
detect a leak at least as small as 0.2 gallons per hour and meet the federal
regulatory requirements regarding probabilities of detection and of false
alarm. Data must be submitted at least monthly.
# To be allowable as an equivalent to tank tightness testing, a SIR method
must be able to detect a leak at least as small 0.1 gallons per hour and
meet the federal regulatory requirements regarding probabilities of detection
and of false alarm.
Straight Talk On Tanks 14
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# The individual SIR method must have been evaluated with a test procedure
to certify that it can detect leaks at the required level and with the
appropriate probabilities of detection and of false alarm.
# The method's evaluation must reflect the way the method is used in the
field. If a SIR method is not performed by the SIR vendor, then the
method's evaluation must be done without the involvement of the SIR
vendor. Examples of this situation are SIR methods licensed to owners and
hybrid ATGS/SIR methods.
# If the test report is not conclusive, you must take the steps necessary to
find out conclusively whether your tank is leaking. Because SIR requires
multiple days of data, you will probably have to use another method.
# You must keep on file both the test reports and the documentation that the
SIR method used is certified as valid for your LIST system.
Will it work at your site?
#
#
#
SIR has been used primarily on tanks no more than 18,000 gallons in
capacity. If you are considering using a SIR method for larger tanks, check
the method's evaluation to confirm that it will meet regulatory requirements
and your needs.
A SIR method's ability to detect leaks declines as throughput increases. If
you are considering using a SIR method for high throughput LIST systems,
check the method's evaluation to confirm that it will meet regulatory
requirements and your needs.
Water around a tank may hide a hole in the tank or distort the data to
analyzed by temporarily preventing a leak. To detect a leak in this
situation, you should check for water at least once a month.
be
Anything else you should consider?
# Data, including product level measurements, dispensing data, and delivery
data, should all be carefully collected according to the SIR vendor's
specifications. Poor data collection produces inconclusive results and
noncompliance.
# The SIR vendor will generally provide forms for recording data, a calibrated
chart converting liquid level to volume, and detailed instructions on
conducting measurements.
# SIR should not be confused with other release detection methods that also
rely on periodic reconciliation of inventory, withdrawal, and delivery data.
Unlike manual tank gauging or inventory control, SIR uses a sophisticated
statistical analysis of data to detect releases.
Find out if there are
state or local
requirements on the
use of statistical
inventory
reconciliation that
differ from those
described here.
Straight Talk On Tanks 15
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Tank Tightness Testing With Inventory Control
Will you be in compliance?
When performed according to the manufacturer's specifications, periodic tank
tightness testing combined with monthly inventory control can temporarily
meet the federal leak detection requirements for tanks (this method does not
detect piping leaks). See page 19 for time restrictions.
These two leak detection methods must be used together, because neither
method alone meets the federal requirements for leak detection for tanks.
Tightness testing is also an option for underground piping, as described in the
section on leak detection for piping starting on page 22.
Because they must be used together, both tank tightness testing and
inventory control are discussed in this section. Tank tightness testing is
discussed first, followed by inventory control.
Tank Tightness Testing
How does the leak detection method work?
Tightness tests include a wide variety of methods. Other terms used for these
methods include "precision," "volumetric," and "nonvolumetric" testing.
# Many tightness test methods are "volumetric" methods in which the
change in product level in a tank over time is measured very precisely (in
milliliters or thousandths of an inch).
# Other methods use acoustics or tracer chemicals to determine the
presence of a hole in the tank. With such methods, all of the factors in the
following bullets may not apply.
# For most methods, changes in product temperature also must be
measured very precisely (thousandths of a degree) at the same time as
level measurements, because temperature changes cause volume
changes that interfere with finding a leak.
# For most methods, a net decrease in product volume (subtracting out
volume changes caused by temperature) over the time of the test
indicates a leak.
# The testing equipment is temporarily installed in the tank, usually through
the fill pipe.
# The tank must be taken out of service for the test.
# Many test methods require that the product in the tank be a certain level
before testing, which often requires adding product from another tank on-
site or purchasing additional product.
Straight Talk On Tanks 16
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# Some tightness test methods require all of the measurements and
calculations to be made by hand by the tester. Other tightness test
methods are highly automated. After the tester sets up the equipment, a
computer controls the measurements and analysis.
# A few methods measure properties of the product that are independent of
temperature, such as the mass of the product, and so do not need to
measure product temperature.
# Some automatic tank gauging systems are capable of meeting the
regulatory requirements for tank tightness testing and can be considered
as an equivalent method.
What are the regulatory requirements?
# The tightness test method must be able to detect a leak at least as small
as 0.1 gallon per hour with certain probabilities of detection and of false
alarm.
# Tightness tests must be performed periodically. New LIST systems—those
installed after December 1988—must have tank tightness tests every 5
years for 10 years following installation.
In most cases, existing LIST systems—those installed before December
1988—that have spill, overfill, and corrosion protection must have tank
tightness tests every 5 years for 10 years following upgrade. See page 19
for some cases requiring fewer tightness tests. Existing LIST systems that
have not been upgraded must have tank tightness tests annually until
December 1998, after which these tanks must be upgraded, replaced, or
closed.
# After the applicable time period noted above, you must have a monitoring
method that can be performed at least once per month. See the other
sections of this booklet for allowable monthly monitoring options.
Anything else you should consider?
# For most methods, the test is performed by a testing company. You just
observe the test.
# Tank tightness testing has been used primarily on tanks no more than
15,000 gallons in capacity containing gasoline and diesel. If you are
considering using tightness testing for larger tanks or products other than
gasoline or diesel, discuss the method's applicability with the
manufacturer's representative.
# Manifolded tanks generally should be disconnected and tested separately.
# Procedure and personnel, not equipment, are usually the most important
factors in a successful tightness test. Therefore,
well-trained and experienced testers are very important. Some
states and local authorities have tester certification programs.
Find out if there are
state or local
requirements on the
use of these
methods that differ
from those
described here.
Straight Talk On Tanks 17
-------
Ltainq Err/circr/ CDrHro; HnjN
PCX
Inventory Control
How does the leak detection method work?
Inventory control requires frequent measurements of tank contents and math
calculations that let you compare your "stick" inventory (what you've
measured) to your "book" inventory (what your recordkeeping indicates you
should have). Some people call this process "inventory reconciliation." If the
difference between your "stick" and "book" inventory is too large, your tank
may be leaking.
EPA has a booklet, Doing Inventory Control Right, that fully explains how to
do inventory control. The booklet also contains standard recordkeeping
forms. You can order this free booklet by calling EPA's toll-free Hotline at 800
424-9346. See inside the front cover for full ordering information.
# LIST inventories are determined each operating day by using a gauge
stick and recording the data on a form. The level on the gauge stick is
converted to a volume of product in the tank using a calibration chart,
which is often furnished by the LIST manufacturer.
# The amounts of product delivered to and withdrawn from the LIST each
operating day are also recorded. At least once each month, the gauge
stick data and the sales and delivery data are reconciled and the month's
overage or shortage is determined. If the overage or shortage is greater
than or equal to 1.0 percent of the tank's flow-through volume plus 130
gallons of product, the LIST may be leaking.
What are the regulatory requirements?
# Inventory control must be used in combination with periodic tank tightness
tests.
# The gauge stick should reach the bottom of the tank and be marked so
that the product level can be determined to the nearest one-eighth of an
inch. A monthly measurement should be taken to identify any water at the
bottom of the tank.
# Product dispensers must be calibrated to the local weights and measures
standards.
Anything else you should consider?
# Inventory control is a practical, commonly used management tool that
does not require closing down the tank operation for long periods.
# The accuracy of tank gauging can be greatly increased by spreading
product-finding paste on the gauge stick before taking measurements (or
by using in-tank product level monitoring devices).
# If your tank is not level, inventory control may need to be modified. You
will need to get a corrected tank chart.
Straight Talk On Tanks 18
-------
Time restrictions on the use of this combined method...
Existing LIST systems—those installed before December 1988—that have not
been fully upgraded with spill, overfill, and corrosion protection must have
tank tightness tests annually until December 1998, after which these tanks
must be upgraded, replaced, or closed.
The combined method using tank tightness testing every 5 years is valid only
after the entire UST system has met spill, overfill, and corrosion protection
standards. Following entire UST system upgrade, this combined method may
be used for 10 years (or until December 1998, whichever is later) after the
date the tank was installed or upgraded with corrosion protection. Note that
the end date is based on the compliance status of the tank only, not the
entire UST system. As a result, some USTs may not be able to use this
combined method for as long as 10 years (see discussion below). At the end
of the valid time period, you must use one of the monthly monitoring leak
detection choices described in this booklet.
Unique time restriction for some existing USTs...
For some existing USTs—those which had corrosion protection before the
entire UST system met upgrade standards—this combined method
of inventory control and tightness testing every 5 years may be valid for less
than 10 years.
Federal regulations state that the combined method can be used:
1) until December 1998 or 10 years after the tank is protected from corrosion
(whichever date is later), and 2) the period of validity cannot begin until the
entire UST system meets upgrade standards. Therefore,
in those cases where the tank had corrosion protection before the UST
system met upgrade standards, the period of validity is less than
10 years. The effect of this restriction will be clear in the following example: a
bare steel tank upgraded with corrosion protection in 1986 (or the tank was
made of noncorrodible material and installed in 1986), but the piping, spill,
and overfill upgrades were not added until 1995. The UST system in this
example could start using the combined method only in 1995 (when the full
system met upgrade standards) and could use the combined method only
until 1998 (the date which is the later of either 1998 or 10 years after the tank
has corrosion protection). In this example, the UST may use the combined
method to meet federal leak detection requirements only for three years (from
1995 to 1998).
Correspondingly, when the period of validity is less than 10 years,
fewer periodic tightness tests may be required.
Check with your implementing agency for guidance.
The combined method
can be used only
temporarily.
Be sure you know how
long you can use the
combined method to
meet federal, state, or
local requirements.
Straight Talk On Tanks 19
-------
*fl* Mor.ua! Ten
Manual Tank Gauging
Will you be in compliance?
NOTE: Manual tank gauging can be used only on tanks 2,000 gallons
or less capacity. Tanks 1,000 gallons or less can use this method alone.
Tanks from 1,001-2,000 gallons can temporarily use manual tank gauging
only when it is combined with tank tightness testing. Manual tank gauging
cannot be used on tanks over 2,000 gallons. When performed according to
recommended practices, manual tank gauging meets the federal leak
detection requirements for USTs with a capacity of 1,000 gallons or less for
the life of the tank. Manual tank gauging detects leaks only from tanks (this
method does not detect piping leaks). For requirements for piping, see the
section on leak detection for piping starting on page 22.
How does the leak detection method work?
EPA has a booklet, Manual Tank Gauging, that fully explains how to do
manual tank gauging correctly. The booklet also contains standard
recordkeeping forms. You can order this free booklet by calling EPA's toll-free
Hotline at 800 424-9346. See inside the front cover for complete ordering
information.
# Four measurements of the tank's contents must be taken weekly,
two at the beginning and two at the end of at least a 36-hour period
during which nothing is added to or removed from the tank. See the table
on the next page.
# The average of the two consecutive ending measurements are
subtracted from the average of the two beginning measurements to
indicate the change in product volume.
# Every week, the calculated change in tank volume is compared to the
standards shown in the table on the next page. If the calculated change
exceeds the weekly standard, the LIST may be leaking.
Also, monthly averages of the four weekly test results must be compared
to the monthly standard in the same way. See the table on the next page.
What are the regulatory requirements?
# Liquid level measurements must be taken with a gauge stick that is
marked to measure the liquid to the nearest one-eighth of an inch.
# Manual tank gauging may be used as the sole method of leak detection
for tanks with a capacity of 1,000 gallons or less for the life of the tank.
Tanks between 551 and 1,000 gallons have testing standards based on
their diameter or their additional use of tightness testing (see table).
These tanks may temporarily use a combination of manual tank gauging
and periodic tank tightness (see next bullet on page 21).
Straight Talk On Tanks 20
-------
Table of Test Standards for Manual Tank Gauging
Tank Size
up to 550 gallons
551-1 ,000 gallons (when
tank diameter is 64")
551-1 ,000 gallons (when
tank diameter is 48")
551-1 ,000 gallons
(also requires periodic
tank tightness testing)
1 ,001-2,000 gallons (also
requires periodic tank
tightness testing)
Minimum
Duration Of Test
36 hours
44 hours
58 hours
36 hours
36 hours
Weekly Standard
(1 test)
10 gallons
9 gallons
12 gallons
13 gallons
26 gallons
Monthly
Standard (4-test
average)
5 gallons
4 gallons
6 gallons
7 gallons
13 gallons
# For tanks with a capacity of 1,001-2,000 gallons, manual tank gauging
must be combined with periodic tightness testing. This combined method
will meet the federal requirements only temporarily. See page 19 for an
explanation of time restrictions that also applies to the combination of
manual tank gauging and tank tightness testing. You must eventually have
another monitoring method that can be performed at least once a month.
See the other sections of this booklet for allowable monthly monitoring
options. Also, see
pages 16-17 on tank tightness testing for details on this method.
# Tanks greater than 2,000 gallons in capacity may not use this method of
leak detection to meet these regulatory requirements.
Anything else you should consider?
# You can perform manual tank gauging yourself. Correct gauging,
recording, and math are the most important factors for successful tank
gauging. The accuracy of tank gauging can be greatly increased by
spreading product-finding paste on the gauge stick before taking
measurements.
Straight Talk On Tanks 21
-------
Leak Detection For Underground Piping
Will you be in compliance?
When installed and operated according to the manufacturer's specifications,
the leak detection methods discussed here meet the federal regulatory
requirements for the life of underground piping systems. Your LIST may have
suction or pressurized piping, which are discussed below.
What are the regulatory requirements for suction piping?
# No leak detection is required if the suction piping has (1) enough slope so
that the product in the pipe can drain back into the tank when suction is
released and (2) has only one check valve, which is as close as possible
beneath the pump in the dispensing unit. If a suction line is to be
considered exempt based on these design elements, there must be some
way to check that the line was actually installed according to these plans.
# If a suction line does not meet all of the design criteria noted above, one
of the following leak detection methods must be used:
*• A line tightness test at least every 3 years; or
*• Monthly interstitial monitoring; or
- Monthly vapor monitoring; or
- Monthly groundwater monitoring; or
*• Monthly statistical inventory reconciliation; or
*• Other monthly monitoring that meets performance standards.
The line tightness test must be able to detect a leak at least as small as 0.1
gallon per hour at 1.5 times normal operating pressure with certain
probabilities of detection and of false alarm.
Interstitial monitoring, vapor monitoring, groundwater monitoring, and
statistical inventory reconciliation have the same regulatory requirements for
piping as they do for tanks. See the earlier sections of this booklet on those
methods.
Straight Talk On Tanks 22
-------
What are the regulatory requirements for pressurized piping?
Each pressurized piping run must have one leak detection method from each
set below:
An Automatic Line Leak Detector:
- Automatic flow restrictor; or
>• Automatic flow shutoff; or
>• Continuous alarm system.
And One Other Method:
>• Annual line tightness test; or
>• Monthly interstitial monitoring; or
>• Monthly vapor monitoring; or
- Monthly groundwater monitoring; or
- Monthly statistical inventory reconciliation; or
- Other monthly monitoring that meets performance standards.
# The automatic line leak detector (LLD) must be designed to detect a leak
at least as small as 3 gallons per hour at a line pressure of
10 pounds per square inch within 1 hour by shutting off the product flow,
restricting the product flow, or triggering an audible or visual alarm.
# The line tightness test must be able to detect a leak at least as small as
0.1 gallon per hour when the line pressure is 1.5 times its normal
operating pressure. The test must be conducted each year. If the test is
performed at pressures lower than 1.5 times operating pressure, the leak
rate to be detected must be correspondingly lower.
# Automatic LLDs and line tightness tests must also be able to meet the
federal regulatory requirements regarding probabilities of detection and
false alarm.
# Interstitial monitoring, vapor monitoring, groundwater monitoring, and
statistical inventory reconciliation have the same regulatory requirements
for piping as they do for tanks. See the earlier sections of this booklet on
those methods.
Find out if there are
state or local
requirements on the
use of leak
detection methods
for piping that differ
from those
described here.
How do the leak detection methods work?
Automatic line leak detectors (LLDs)
# Flow restrictors and flow shutoffs can monitor the pressure within the line
in a variety of ways: whether the pressure decreases over time; how long
it takes for a line to reach operating pressure; and combinations of
increases and decreases in pressure.
Straight Talk On Tanks 23
-------
# If a suspected leak is detected, a flow restrictor keeps the product flow
through the line well below the usual flow rate. If a suspected leak is
detected, a flow shutoff completely cuts off product flow in the line or
shuts down the pump.
# A continuous alarm system constantly monitors line conditions and
immediately triggers an audible or visual alarm if a leak is suspected.
Automated internal, vapor, or interstitial line monitoring systems can also
be set up to operate continuously and sound an alarm, flash a signal on
the console, or even ring a telephone in a manager's office when a leak is
suspected.
# Both automatic flow restrictors and shutoffs are permanently installed
directly into the pipe or the pump housing.
# Vapor, interstitial, or other monitoring systems can be installed to shut off
flow, restrict flow, or trigger an alarm whenever a leak is detected. If it
meets the applicable standards, such a setup meets the monthly
monitoring requirement as well as the LLD requirement.
Line tightness testing
# Tracer methods do not measure pressure or flow rates of the product.
Instead they use a tracer chemical to determine if there is a hole in the
line. With tracer methods, all of the factors below may not apply.
# The line is taken out of service and pressurized, usually above the normal
operating pressure. A drop in pressure over time, usually an hour or
more, suggests a possible leak.
# Suction lines are not pressurized very much during a tightness test (about
7 to 15 pounds per square inch).
# Most line tightness tests are performed by a testing company. You just
observe the test.
# Some tank tightness test methods can be performed to include a
tightness test of the connected piping.
# For most line tightness tests, no permanent equipment is installed.
# In the event of trapped vapor pockets, it may not be possible to conduct a
valid line tightness test. There is no way to tell definitely before the test
begins if this will be a problem, but long complicated piping runs with
many risers and dead ends are more likely to have vapor pockets.
# Some permanently installed electronic systems (which often include
ATGS) can meet the requirements of monthly monitoring or a line
tightness test.
Straight Talk On Tanks 24
-------
Secondary containment with interstitial monitoring
# A barrier is placed between the piping and the environment. Double-
walled piping or a leakproof liner in the piping trench can be used.
# A monitor is placed between the piping and the barrier to sense a leak if it
occurs. Monitors range from a simple stick that can be put in a sump to
see if a liquid is present, to continuous automated systems that monitor
for the presence of liquid product or vapors.
# Proper installation of secondary containment is the most important and
the most difficult aspect of this leak detection method. Trained and
experienced installers are necessary.
# See the section on secondary containment for additional information.
Secondary containment for piping is similar to that for tanks.
Vapor or groundwater monitoring
# Vapor monitoring detects product that leaks into the soil and evaporates.
# Groundwater monitoring checks for leaked product floating on the
groundwater near the piping.
# A site assessment must be used to determine monitoring well placement
and spacing.
# LIST systems using vapor or groundwater monitoring for the tanks are well
suited to use the same monitoring method for the piping.
# See the earlier sections on vapor and groundwater monitoring. Use of
these methods with piping is similar to that for tanks.
Straight Talk On Tanks 25
-------
Free Publications About UST Requirements
AVAILABLE FREE...You can go to our Web site at http://www.epa.gov/OUST/ to order or read
documents online. You can call EPA's toll-free RCRA/Superfund Hotline at 800 424-9346 and order
up to 30 free copies. Or you can write and ask for titles by addressing your request to NCEPI, our
publication distributor: NCEPI, Box 42419, Cincinnati, OH 45242. Or you can make your request by
calling NCEPI's toll-free number at 800 490-9198. Or you can fax your order to NCEPI at 513 891 -6685.
If you want more than 30 copies, contact Jay Evans at 703 603-7149.
TITLES
Musts For USTs: A Summary Of Federal Regulations For Underground Storage Tank Systems
Booklet clearly summarizes federal UST requirements for installation, release detection, spill, overfill, and corrosion protection,
corrective action, closure, reporting and recordkeeping. Updated & revised 1995 (36 pages). Also available as Normas y
Procedimientos para T.SA,Spanish translation of 1988 edition of Musts For USTs (40 pages).
Straight Talk On Tanks: Leak Detection Methods For Petroleum Underground Storage Tanks
Booklet explains federal regulatory requirements for leak detection and briefly describes allowable leak detection methods.
Updated & revised 1995 (28 pages).
Doing Inventory Control Right: For Underground Storage Tanks
Booklet describes how owners and operators of USTs can use inventory control and periodic tightness testing to meet federal leak
detection requirements. Contains reporting forms (16 pages).
Manual Tank Gauging: For Small Underground Storage Tanks
Booklet provides simple, step-by-step directions for conducting manual tank gauging for tanks 2,000 gallons or smaller. Contains
reporting forms (12 pages).
Introduction To Statistical Inventory Reconciliation: For Underground Storage Tanks
Booklet describes how Statistical Inventory Reconciliation (SIR) can meet federal leak detection requirements (12 pages).
Don't Wait Until 1998: Spill, Overfill, And Corrosion Protection For Underground Storage Tanks
Information to help owners and operators of USTs meet the 1998 deadline for compliance with requirements to upgrade, replace,
or close USTs installed before December 1988. Materials available as a 16-page booklet, a trifold leaflet, or Spanish translation of
the booklet (No Espere Haste El 1998!).
Are You Upgrading An Underground Storage Tank System?
Trifold leaflet can help UST owners and operators make sound decisions about choosing tank integrity assessment methods and
upgrading USTs to meet 1998 deadline requirements.
Closing Underground Storage Tanks: Brief Facts
Trifold leaflet presents "brief facts" on properly closing USTs in order to comply with federal closure requirements.
Dollars And Sense: Financial Responsibility Requirements For Underground Storage Tanks
Booklet summarizes the "financial responsibility" required of UST owners and operators (16 pages).
An Overview Of Underground Storage Tank Remediation Options
Information about technologies for remediating petroleum contamination in soil and groundwater (26 pages).
Controlling UST Cleanup Costs
Fact sheet series on the cleanup process includes: Hiring a Contractor, Negotiating the Contract, Interpreting the Bill, Managing the
Process, and Understanding Contractor Code Words (10 pages).
Pay-For-Performance Cleanups: Effectively Managing Underground Storage Tank Cleanups
Booklet explores potential advantages of using pay-for-performance cleanup agreements to reduce the cost and time of cleanups
and more effectively manage cleanup resources (32 pages).
Financing Underground Storage Tank Work: Federal And State Assistance Programs
Booklet identifies potential sources of financial assistance to cover the costs of upgrading, replacing, or closing an UST, or of
cleaning up an UST release (30 pages).
Straight Talk On Tanks 26
-------
Videos About UST Requirements
There are several helpful videos you can order, at cost, as explained below:
VIDEOS
TITLE/COST
AVAILABLE FROM
Tank Closure Without Tears: An Inspector's Safety Guide
Focuses on explosive vapors and safe tank removal (30 minutes).
Video and Booklet Cost: $35; Booklet: $5
What Do We Have Here?: An Inspector's Guide To Site Assessment At
Tank Closure
Inspecting sites for contamination where tanks have been removed.
Part 1: Site Assessment Overview (30 minutes); Part 2: Field Testing Instruments At
A Glance (14 minutes); Part 3: Soil And Water Sampling
At A Glance (7 minutes). Video and Booklet Cost: $45; Booklet: $5
Searching For The Honest Tank: A Guide To UST Facility Compliance
Inspection
Covers major aspects of UST inspections, including protocols, equipment, cathodic
protection, and leak detection. Directed at inspectors, yet also helpful to owners and
operators (30 minutes). Video and Booklet Cost: $40; Booklet: $5
New England Interstate
Environmental Training Center
ATTNVIDEOS
2 Fort Road
South Portland, ME 04106
207 767-2539
Tank Time
Humorous presentation explains what UST owners and operators must do to
comply with the December 1998 deadline to upgrade, replace, or close tanks
installed before December 1988 (18 minutes). Cost: $24
Doing It Right
Illustrates proper installation of underground tanks and piping for installation crews.
Part 1: Tanks (24 minutes); Part 2: Piping (16 minutes).
Doing It Right II: Installing Required UST Equipment
Illustrates installation of spill and overfill equipment, observation wells, and piping
leak detection (23 minutes).
Keeping It Clean: Making Safe And Spill-Free Motor Fuel Deliveries
Making pollution-free deliveries to USTs. Includes Stage 1 vapor recovery, overfill
prevention and spill containment. For fuel tanker drivers and UST owner/operators
(25 minutes).
Petroleum Leaks Underground
How liquids and vapors move in the subsurface and why early response to leaked
petroleum is so important. Part 1: How Liquids Move (14 minutes);
Part 2: How Vapors Move (15 minutes).
Straight Talk on Leak Detection
Overview of the leak detection methods available for complying with federal
regulations (30 minutes).
RBCA: Initial Site Assessment
Overview of risk-based corrective action process produced by Shell Oil Company
(25 minutes).
Scene Three, Inc.
ATTN: "Tank Time"
1813 Eighth Avenue, South
Nashville, TN 37203
615385-2820
Contact EPA's Hotline at
800 424-9346 for cost and ordering
information.
Straight Talk On Tanks 27
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Slate UST Program Offices
Alabama
Alabama Dept. of Env.
Mgt./Groundwater Section/
Water Div.
1751 Cong. Dickinson Dr.
Montgomery, AL 36130
Phone:(334)271-7986
Fax: (334)271-7950
Alaska
Alaska Dept. of Env.
Conservation
410WilloughbyAve.
Juneau.AK 99801-1795
Phone:(907)465-5203
Fax:(907)465-5218
Arkansas
Arkansas Dept. of Pollution
Control & Ecology
Regulated Storage Tanks
P.O. Box 8913
8101 Interstate 30,6ldgD
Little Rock, AR 72219-8913
Phone:(501)682-0744
Fax:(501)682-0880
Arizona
Arizona Dept. of Env. Quality
3033 North Central Ave.
Phoenix, AZ 85012
Phone:(602)207-4324
Fax:(602)207^346
California
California State Water Resources
Control Board
Div. of Clean Water Programs
P.O. Box944212
Sacramento, CA 94244-2120
Phone:(916)227-4313
Fax: (916)227-4349
Colorado
Colorado State Oil Inspection
1515ArapahoeSt.
Tower 3, Suite 600
Denver, CO 80202-2117
Phone: (303)620-4300
Fax: (303)620-4028
Connecticut
Connecticut Dept. of Env.
Protection/Waste Mgt. Bureau
State Office Bldg.
79 Elm Street
Hartford, CT 06106
Phone:(860)424-3374
Fax: (860)424-4057
Delaware
Delaware Dept. of Natural
Resources & Env. Control
UST Branch
715Grantham Lane
Newcastle, DE 19720^1801
Phone:(302)323-4588
Fax:(302)323^561
District of Columbia
D.C. Env. Reg. Adm./ Haz. Waste &
UST Division
2100 Martin Luther King Ave.,SE-
Suite 203
Washington, DC 20020
Phone: (202)645-6080
Fax: (202)645-6622
Florida
Florida Dept. of Env.
Regulation/Tank Section
Twin Towers Bldg.; Room 403
2600 Blair Stone Road
Tallahassee, FL 32399-2400
Phone:(904)488-3935
Fax:(904)922^939
Georgia
Georgia Dept. of Natural
Resources/UST Mgt. Program
4244 Inter. Parkway; Suite 100
Atlanta, GA 30354
Phone:(404)362-2687
Fax:(404)362-2654
Hawaii
Hawaii Dept. of Health
Solid and Hazardous Waste Br.
919 Ala Moana Blvd.; Suite 212
Honolulu, HI 96814
Phone:(808)586-4226
Fax:(808)586-7509
Idaho
Idaho Div. of Env. Quality
1410 North Hilton
Boise, ID 83706
Phone:(208)373-0502
Fax:(208)373-0576
Illinois
Illinois Office of State Fire
Marshal/Div. of Petroleum &
Chemical Safety
1035StephensonDr.
Springfield, IL 62703
Phone:(217)785-5878
Fax:(217)782-1062
Indiana
Indiana Dept. of Env. Mgmt./Office of
Env. Response
1 DON. Senate Ave.
Indianapolis, IN 46206
Phone:(317)308-3060
Fax:(317)233-0909
Iowa
Iowa Dept. of Natural
Resources/UST Section
Wallace State Office Bldg.
900 East Grand
DesMoines, IA50319
Phone:(515)281-8135
Fax:(515)281-7212
Kansas
Kansas Dept.of Health &
Env./Bureau Env. Remed./ Storage
Tank Section
Forbes Field, Bldg. 740
Topeka, KS 66620
Phone:(913)296-1678
Fax:(913)296-6190
Kentucky
Kentucky Division of Waste
Management/UST Branch
14ReillyRoad
Frankfort, KY 40601
Phone:(502)564-6716
Fax:(502)564^245
Louisiana
Louisiana Dept. of Env.
Quality/UST Division
P.O. Box82178
Baton Rouge, LA 70884-2178
Phone:(504)765-0243
Fax:(504)765-0366
Maine
Maine Dept. of Env. Protection
6ur. Remediation & Waste Mgt.
Ray Bldg, Station #17
Augusta, ME 04333
Phone:(207)287-2651
Fax:(207)287-7826
Maryland
Maryland Dept. of Env.
Waste Mgt. Admin.
Oil Control Program
2500 Broening Highway
Baltimore, MD 21224
Phone:(410)631-3442
Fax:(410)631-3092
Massachusetts
Massachusetts Dept. of Public
Safety/UST Program
One Ashburton Place; Rm 1310
Boston, MA 02108
Phone:(617)727-3200
Fax:(617)727^390
Michigan
Michigan Dept. of Env.
Quality/UST Division
P.O. Box30157
Lansing, Ml 48909-7657
Phone:(517)373-8168
Fax:(517)335-2245
Minnesota
Minnesota Pollution Control
Agency/UST Program
520 Lafayette Road North
St. Paul, MN 55155-3898
Phone:(612)297-8608
Fax:(612)297-8676
Mississippi
Mississippi Dept. of Env. Quality
Bureau of Pollution Control
UST Section
P.O. 60x10385
Jackson, MS 39289-0385
Phone:(601)961-5171
Fax:(601)354-6612
Missouri
Missouri Dept. of Natural
Resources/Haz. Waste
Program/Tanks Section
P.O. 6ox 176
Jefferson City, MO 65102-0176
Phone:(573)751-6822
Fax:(573)562-8922
Montana
Montana Dept. of Env.Quality
Waste Management Div.
P.O. 60x200901
Helena, MT 59620-0901
Phone:(406)444-5970
Fax:(406)444-1902
Nebraska
Nebraska State Fire Marshal
Flammable Liquid Storage
246 South 14th Street
Lincoln, NE 68508
Phone:(402)471-9465
Fax:(402)471-3118
Nevada
Nevada Dept. of Cons. & Nat.
Resources/Div. of Env.Prot.
Capitol Complex
333 W.Nye Lane
Carson City, NV 89710
Phone:(702)687-5872
Fax:(702)687-6396
New Hampshire
New Hampshire Dept. of
Env. Services/Groundwater
Protection 8ureau
P.O. 6ox 95
6 Hazen Drive
Concord, NH 03302
Phone:(603)271-3644
Fax:(603)271-2181
Straight Talk On Tanks 28
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State UST Program Offices
New Jersey
New Jersey Dept. of Env. Prot. and
Energy/Responsible Party Site
Remediation
401 East State St. (CN-028)
Trenton, NJ 08625-0028
Phone:(609)292-8761
Fax:(609)633-1454
New Mexico
New Mexico Env. Dept.
UST Bureau
P.O. Box 26110
H. Runnels Bldg, Rm N2150
Santa Fe, NM 87504-0968
Phone:(505)827-2932
Fax:(505)827-0310
New York
New York Dept. of Env. Cons./Bulk
Storage Section
50 Wolf Road, Rm 340
Albany, NY 12233-3750
Phone:(518)457-4351
Fax:(518)457^332
North Carolina
North Carolina Pollution Control
Branch/Div. of Env. Mgt/Dept. Env.
Health&Natural Resources
441 N. Harrington St.
Raleigh, NC 27603
Phone:(919)733-8486
Fax:(919)733-9413
North Dakota
Div. of Waste Mgt./North Dakota
Dept. of Health
UST Program
1200 Missouri Ave.
P.O. Box 5520
Bismarck, ND 58506-5520
Phone:(701)328-5166
Fax:(701)328-5200
Ohio
Ohio Dept. of Commerce
Bureau of UST Regulations
P.O. Box 687
6606 Tussing Road
Reynoldsburg, OH 43068-9009
Phone:(614)752-7938
Fax:(614)752-7942
Oklahoma
Oklahoma Corp. Commission
Fuel Storage Div.
Jim Thorpe Bldg.
2101 North Lincoln Blvd.
Oklahoma Cily, OK 73105
Phone:(405)521-3107
Fax:(405)521-6576
Oregon
Oregon Dept. of Env.
Quality/UST Program
811SW Sixth Ave.; 9th Floor
Portland, OR 97204
Phone:(503)229-5733
Fax:(503)229-6954
Pennsylvania
Pennsylvania Dept. of
Env. Prot./Bureau of Water Quality
MgtVStorage Tank Prgm
Rachel Carson State Off. Bldg.
P.O. Box 8762
Harrisburg, PA 17105-8762
Toll-free UST: 1-800-42TANKS
Phone:(717)772-5599
Fax:(717)772-5598
Rhode Island
Dept. of Env. Mgt./UST Section
291 Promenade St.
Providence, Rl 02908
Phone:(401)277-2234
Fax:(401)521^230
South Carolina
South Carolina Dept. of Health
and Env. Control/Bureau of UST
Management
2600 Bull St.
Columbia, SC 29201
Phone:(803)734-5331
Fax:(803)734-3604
South Dakota
South Dakota Dept. of Env. & Nat.
Resources/UST Program
523 East Capitol
Pierre, SD 57501
Phone:(605)773-3296
Fax:(605)773-6035
Tennessee
Tennessee Dept. of Env. and
Conservation/Div. of USTs
4th Floor, L & C Tower
401 Church St.
Nashville, TN 37243-1541
Phone:(615)532-0945
Fax:(615)532-0938
Texas
Texas Natural Resources
Conservation Commission
Petroleum Storage Tank Div.
MC: 133
P.O. Box13087
Austin, TX 78711-3087
Phone:(512)239-2106
Fax:(512)239-2177
Utah
Utah Dept. of Env. Quality
Div. of Env. Response and
RemediatJon/UST Branch
P.O. Box 144840
Salt Lake City, UT 84114^840
Phone:(801)536-4100
Fax:(801)359-8853
Vermont
Dept. of Env. Conservation
Haz. Materials Mgt. Div.
103 South Main St.
Waterbury, VT 05676
Phone:(802)241-3882
Fax:(802)244-5141
Virginia
Virginia Dept. of Env. Quality
Underground Storage Tanks
P.O. Box10009
Richmond, VA 23240
Phone:(804)698-4313
Fax:(804)698^266
Washington
Washington Dept. of Ecology
Toxics Cleanup Program
P.O. 60x47600
Olympia, WA 98504-7600
Phone:(360)407-7170
Fax: (360)407-7154
West Virginia
West Virginia Div. of
Env. Protection/Office of Waste
Mgt./UST Section
1356HansfordSt.
Charleston, WV 25301
Phone:(304)558-6371
Fax:(304)558-2387
Wisconsin
Wisconsin Dept. of Commerce
Env. & Reg. Services Div.
P.O. 60x7969
201 East Washington Ave.
Madison, Wl 53707-7969
Phone: (608)266-7874
Fax:(608)267-0592
Wyoming
Wyoming Dept. Of Env. Quality
Water Quality Division
Herschler 6ldg.; 4th Floor West
122 West 25th St.
Cheyenne, WY 82002
Phone:(307)777-7096
Fax:(307)777-5973
U.S. Territories
American Samoa
American Samoa Env.
Protection Agency
Office of the Governor
American Samoa Government
ATTN: UST Program
Pago Pago, AS 96799
Phone:011-684-633-2304
Fax:011-684-633-5801
Northern Mariana Islands
Div. of Environmental Quality
Commonwealth of Northern
Mariana Islands
P.O. 6ox 1304
3rd Floor, Morgens 8ldg.
San Jose
Saipan, MP 96950
Phone:011-670-234-1011
Fax:011-670-234-1003
Guam
Guam Env. Protection Agency
IT&E; Harmon Plaza
Complex Unit D-107
130RojasSt.
Harmon, GU 96911
Phone:011-671-646-8863
Fax:011-671-646-9402
Puerto Rico
Environmental Quality 8oard
P.O. 60x11488
Commonwealth of Puerto Rico
Santurce, PR 00910
Phone:(787)767-8109
Fax:(787)767-1962
Virgin Islands
Div. of Env. Protection/Dept. of
Planning and Nat. Resources
396-1 Foster Plaza
Annas Retreat
Charlotte Amalie
St. Thomas, VI 00802
Phone:(809)774-3320
Fax:(809)775-5706
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&EPA
United States
Environmental Protection
Agency
5403W
Washington, DC 20460
Official Business
Penalty for Private Use
$300
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