THE WYOMING Storage Tank Program

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THE WYOMING Storage Tank Program
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BEFORE THE PROGRAM

• Tanks were installed without corrosion
  protection
• Filling was done without concern about
  overfilling
• Lines often leaked without being detected because
  inventory was not carefully checked

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RESULTING IN

• Inventory losses due to leakage
• Explosions caused by vapors
• Contaminated water supplies
• Vapors in basements, storm sewers and utilities
• Cancer and other serious health problems
• Financial Ruin for those responsible for Tanks

FOR MORE INFORMATION...

• The Wyoming Water Quality Division, Storage Tank
  Program, 122 West 25th Street, Cheyenne, WY 82002
  [phone] and [phone] (FAX) and
  blucht_at_missc.state.wy.us

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• You will find references to Wyoming State
  regulations and statutes in
• this space gtgt
• Each of those references has a link to the actual
  text of those rules and statutes. On the next
  screen you will find the Requirements for
  Underground Storage Tanks. Each of those
  requirements has a link to allow you to start
  viewing at any of them. This presentation is
  designed to be viewed without sound.

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Requirements for Underground Storage Tanks
REQUIRED BY ARTICLE 14, ENVIRONMENTAL QUALITY ACT
AND CHAPTER 17

• Annual Registration
• Annual Fee
• Leak Detection for all Tanks
• Leak Detection for all Connected Lines
• Minimum Site Assessment
• Financial Responsibility
• Corrosion Protection
• Spill Prevention Equipment
• Overfill Prevention Equipment
• Permanent Abandonment of Out of Service Tanks
• Reporting and Investigation of Suspected Releases

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Annual Registration
REQUIRED BY W.S. 35-11-1425 and CHAPTER 17,
SECTION 7 (B)

• Name and Address of Owner/Operator
• Location, size, types of Tanks
• Type of Substance Stored

FOR MORE INFO...

• The Wyoming Water Quality Division, AUST Program,
  122 West 25th Street, Cheyenne, WY 82002 (307)
  777-7095 [phone] (FAX) and
  blucht_at_missc.state.wy.us

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Tank Fees
REQUIRED BY W.S. 35-11-1425

• Underground tanks
• Owners pay 200.00 per tank per year
• Out of Service Tanks
• Owners pay until removed
• Aboveground tanks under 5000 gallons
• Owners pay 50.00 per tank per year
• Aboveground tanks over 5000 gallons
• Owners pay 200.00 per tank per year

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Leak Detection

• At least one method of leak detection is required
  for the Underground Storage Tank itself.
• And
• At least one method of leak detection is required
  for any underground lines attached to the tank.

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Leak Detection Methods - Tanks
deq Need a Hotlink on each of these
REQUIRED BY CHAPTER 17 SECTION 14(a)

• Manual Tank Gauging
• Inventory Control
• Tank Tightness Testing
• Automatic Tank Gauging
• Statistical Inventory Reconciliation
• Interstitial Monitoring
• Vapor Monitoring Wells
• Groundwater Monitoring Wells

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MANUAL TANK GAUGING
REQUIREMENTS FOR THIS METHOD ARE IN CHAPTER 17
SECTION 16(b)

• Manual Tank Gauging or Manual Inventory Control
  alone for tanks under 1000 gallons
• Manual Inventory Control Tank Tightness Testing
  for tanks of 1000 to 2000 gallons
• Tank Tightness Testing
• Overfill
• Underfill
• Tracer

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MANUAL TANK GAUGING
REQUIREMENTS FOR THIS METHOD ARE IN CHAPTER 17
SECTION 16 (b)

• Requires Shut-in of Tank for a minimum of 36
  hours and up to 58 hours depending on size of the
  tank
• Stick Readings taken twice at the beginning of
  the shut-in period and twice at the end of the
  shut-in period
• Stick Readings must be accurate to 1/8
• Must be done once a week
• Usually done on small waste oil tanks

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INVENTORY CONTROL
REQUIREMENTS FOR THIS METHOD ARE IN CHAPTER 17
SECTION 16 (a)

• At least seven stick readings per month and one
  stick reading for every day of active use
• Deliveries preceded by two stick readings and
  ended with two stick readings
• Reconciled both daily and monthly
• Inventory must balance within 1 of inventory
  flow through plus 130 gallons
• Stick readings must be accurate to 1/8

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INVENTORY CONTROL

• If you are using inventory control in conjunction
  with an automatic tank gauge, use the automatic
  tank gauge instead of sticking the tank manually.
• If you have a point of sale cash register, use
  the sales numbers from that system, converted to
  gallons.
• You must close both your sales numbers and your
  delivery numbers at the same time each day.

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TANK TIGHTNESS TESTING

• Provided by an outside company
• Types
• Underfill
• Overfill
• Ullage
• Tracer Tight Surveys

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Underfill Tank Tightness Tests
In the Under fill method, a probe of some type is
inserted into the tank to accurately measure
product level during a shut-in period.
The tank is first filled to near its capacity...
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Overfill Tank Tightness Tests
In the Over fill method, a tube is connected to
the tank to accurately measure product level
during a shut-in period.
The tank is first filled to the top...
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Ullage Tank Tightness Tests
In the Ullage method, the tank is pressurized
with nitrogen with all the vents and product
lines blocked. A microphone inside the tank is
used to listen for noise caused by leaks.
The ullage is the space in the tank above the
product level...
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Tracer Tight Tank Surveys
In the Tracer Tight method the product in the
tank is first inoculated with a very volatile
organic tracer, which is not normally present in
fuel.
About a week later, the tester returns to try and
find the tracer in the soils around tank tanks
and/or lines.
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Automatic Tank Gauges
REQUIREMENTS FOR THIS METHOD ARE IN CHAPTER 17
SECTION 16 (d)

• Measure only the volume of product in the tank.
  Cannot determine if lines are intact and cannot
  detect holes above the product surface
• Two Types
• Earlier Types shut-in the tank once a day
• Continuous Statistical Leak Detection
• Must detect a 0.2 gallons per hour leak
• Three Types of Detectors

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Automatic Tank Gauges
REQUIREMENTS FOR THIS METHOD ARE IN CHAPTER 17
SECTION 16 (d)
Sensor Detects Torque in Tape to Float
Magnetic Float on Rigid Tape
Product Level
Magnets
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Automatic Tank Gauges
REQUIREMENTS FOR THIS METHOD ARE IN CHAPTER 17
SECTION 16 (d)
Sensor Measures Buoyancy Force
Glass Float Shaped to Account for the Round Tank
Product Level
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Automatic Tank Gauges
REQUIREMENTS FOR THIS METHOD ARE IN CHAPTER 17
SECTION 16 (d)
Sensor Receives Ultrasonic Wave and Determines
Product Level
Product Level
Ultrasonic Transmitter
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Automatic Tank Gauges
REQUIREMENTS FOR THIS METHOD ARE IN CHAPTER 17
SECTION 16 (d)

• You must have one passing result for each
  month...
• You must keep those records for three years.
• The passing result should be the highest passing
  result for the month.
• If you cannot obtain one passing result in a
  month, you must declare as suspected release.
• You must also do Inventory Control or another
  equivalent method along with an ATG.

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Statistical Inventory Reconciliation
REQUIREMENTS FOR THIS METHOD ARE IN CHAPTER 17
SECTION 16 (h)
This method requires that all of the measurements
made for Manual Inventory Control be taken on a
daily basis...
And the results are sent out to a Consulting
firm for statistical analysis by a qualified
professional who uses a third party verified
method.
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Statistical Inventory Reconciliation
REQUIREMENTS FOR THIS METHOD ARE IN CHAPTER 17
SECTION 16 (h)
If the SIR Company cannot produce a conclusive
pass or fail, they report an inconclusive
result...
If you receive an inconclusive result, you must
audit your records and resubmit your records to
the SIR Company to attempt to achieve a
conclusive result.
If you receive an inconclusive result, and that
cannot be reconciled, you dont have a valid leak
detection method for that month
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Interstitial Monitoring
REQUIREMENTS FOR THIS METHOD ARE IN CHAPTER 17
SECTION 16 (g)
Monitoring of the space between the two shells of
a double wall tank for both products and water
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Interstitial Monitoring
REQUIREMENTS FOR THIS METHOD ARE IN CHAPTER 17
SECTION 16 (g)
If your interstitial monitoring device indicates
that product has escaped from your tank, you must
declare a suspected release. If your interstitial
space is disabled because it is full of rainwater
or a cable is broken, you do not have a valid
leak detection method for that month.
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Vapor Monitoring Wells
REQUIREMENTS FOR THIS METHOD ARE IN CHAPTER 17
SECTION 16 (e)
Wells must be monitored for vapors at least
monthly
Monitoring Wells
Tank
Tank Basin
Water Table
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Vapor Monitoring Wells

• Cannot be used on any site which is already
  contaminated in such a way as to prevent
  detection of any new release.
• Unfortunately, vapor monitoring wells tend to be
  a one shot deal. Once they detect a leak, it
  may not be possible to clean them up sufficiently
  that they can be used to detect a second leak
  later.

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Groundwater Monitoring Wells
REQUIREMENTS FOR THIS METHOD ARE IN CHAPTER 17
SECTION 16 (f)
Wells must be monitored at least monthly for free
product
Monitoring Wells
Water Table
Tank
Tank Basin
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Leak Detection Methods - Lines
REQUIRED BY CHAPTER 17 SECTION 14 (b)

• Pressurized Lines
• Pressure Check of the Lines - Annually
• Automatic Line Leak Detector (ALLD)
• Annual Check of the ALLD
• Suction Lines
• Exposed Lines

FOR MORE INFORMATION...
The Wyoming Water Quality Division, AUST Program,
122 West 25th Street, Cheyenne, WY 82002 (307)
777-7095 [phone] (FAX) and
blucht_at_missc.state.wy.us
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PRESSURIZED LINES
REQUIRED BY CHAPTER 17 SECTION 14 (b) and SECTION
17
All systems which use pressurized lines must have
an automatic line leak detector (ALLD)
ALLD
SOLENOID VALVE
ALLDs only detect leaks between the solenoid
valve in the dispenser and the ALLD itself
Tank
All ALLDs must detect any leak of 3 gallons per
hour at 10 psi within one hour
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SUCTION LINES
SEE CHAPTER 17 SECTION 14 (b)(ii)
All systems which use suction pumps AND have no
pressure on the lines. These systems cannot have
to have an (ALLD)
CHECK VALVE
Systems which have only one check valve are
exempt from release detection requirements
(Exempt Suction)
Tank
Systems which have a second check valve are not
exempt (US Suction)
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Minimum Site Assessment
REQUIREMENTS FOR MSAS ARE IN CHAPTER 17 SECTION
27

• Number of Drill holes or Test Pits depends on
  size and number of tanks
• May be met during removal or replacement of a
  tank
• Tanks installed before Sept 22, 1988 AND in use
  after September 22, 1988 were required to have an
  MSA by December 22, 1998

Drill hole or test pit
Tank Basin
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Financial Assurance
REQUIRED BY W.S. 35-11-1428

• 1,000,000 liability per release
• (Federal Requirement)
• 30,000 deductible
• Compliance with the AUST Program makes a site
  eligible for the
• Wyoming Corrective Action Account
• Wyoming Financial Responsibility Account

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CORRECTIVE ACTION ACCOUNT
SET UP BY W.S. 35-11-1425

• Pays 100 of the cleanup cost of a release from a
  regulated tank system
• The DEQ contracts directly for cleanup
• No deductible
• Major funding from a set aside equal to 1 cent
  per gallon of fuel taxes
• Wyoming is the only State with this type of
  coverage.

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Financial Responsibility Account
SET UP BY W.S. 35-11-1427

• Pays only after a judgement is rendered against
  the owner or operator of the site
• Pays the first 1,000,000 of any judgement
• 30,000 deductible
• Meets the Federal Financial Assurance Requirement

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1998 UPGRADES
REQUIRED BY CHAPTER 17, SECTION 5 AND SECTION 6

• Overfill Protection
• Spill Prevention
• Corrosion Prevention

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Overfill Prevention Equipment
Three Types of Overfill Prevention
SEE CHAPTER 17 SECTION 5 (C)(I)(B)
Butterfly Valve in Fill Tube
Check Valve in Vent Lines
Automatic Alarm System
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Spill Prevention Equipment
SEE CHAPTER 17 SEC 5(C)(I)(A)
SPILL BUCKET
FILL TUBE
A spill bucket is designed to catch spills during
the filling of the tank
Tank
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Corrosion Prevention
SEE CHAPTER 17 SEC 5(A)

• Non Corrodable Tanks and Lines
• Steel Tanks and Lines
• Sacrificial anode cathodic protection
• Impressed Current cathodic protection
• Fiberglass Clading
• Lining

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Corrosion PreventionNon Corrodable Tanks
SEE CHAPTER 17 SEC 5 (A)(I)
NON-CORRODABLE TANKS ARE MADE ENTIRELY OF
FIBERGLASS REINFORCED PLASTIC
OR...
THEY ARE MADE OF STEEL WHICH HAS BEEN COMPLETELY
CLAD WITH A SECOND TANK MADE OF FIBERGLASS
REINFORCED PLASTIC (COMPOSIT STEEL/FIBERGLASS
TANK)
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Corrosion PreventionComposite Steel/Fiberglass
Tanks
STEEL TANK SHELL
FIBERGLASS SHELL
The fiberglass shell is more than a coating, it
is a complete tank in and of itself.
Composite Tanks may or may not have an
interstitial space between the steel and the
fiberglass shells
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Corrosion PreventionCathodic Protection of
Steel Tanks
SACRIFICIAL ANODE OR IMPRESSED CURRENT SYSTEMS
SACRIFICIAL ANODES MUST BE CHECKED BY A CATHODIC
PROTECTION TESTER ONCE WITHIN SIX MONTHS OF
INSTALLATION AND AGAIN ONCE EVERY THREE YEARS
THEREAFTER
CATHODIC PROTECTION EXPERTS AND TESTERS MUST
MEET THE QUALIFICATIONS FOUND IN CHAPTER 17,
WATER QUALITY RULES AND REGULATIONS
CATHODIC PROTECTION SYSTEMS MUST BE DESIGNED BY A
CATHODIC PROTECTION EXPERT
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Corrosion PreventionCathodic Protection of
Steel Tanks
SACRIFICIAL ANODE SYSTEM
SEE CHAPTER 17 SECTION 9
POTENTENTIAL DIFFERENCES MUST BE
STI-P3 TANKS HAVE DIELECTRIC FITTING
LINES
-.85 VOLTS
-.85 VOLTS
TANK
OR 200 MILLIVOLTS ABOVE BACKGROUND
SACRIFICIAL ANODES
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Corrosion PreventionCathodic Protection of
Steel Tanks
IMPRESSED CURRENT SYSTEM
SEE CHAPTER 17 SECTION 9
POTENTIAL BETWEEN THE TANK, LINES AND ANODES MUST
BE
RECTIFIER
LINES
TANK
-.85 VOLTS
OR 200 MILLIVOLTS ABOVE BACKGROUND POTENTIAL
NON-SACRIFICIAL ANODES
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CRITERIA REQUIRED FOR CP CHECKS
SEE CHAPTER 17, SECTION 9(b), Wyoming Water
Quality Rules and Regulations

• Must be in accordance with the National
  Association of Corrosion Engineers Standard
  RP-02-85, Control of External Corrosion on
  Metallic Buried, Partially Buried or Submerged
  Liquid Storage Systems.

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CP EXPERT vs. CP TESTER
SEE CHAPTER 17, SECTION 4(K) AND 4(O) Wyoming
Water Quality Rules

• CORROSION EXPERT
• Certified by the National Association of
  Corrosion Engineers
• or
• A Registered Professional Engineer with education
  and experience in corrosion control

• CATHODIC PROTECTION TESTER
• a person who can demonstrate understanding of the
  principles and measurements
• education and experience in soil resistivity,
  stray current, structure to soil potential, and
  isolation measurements

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IDEAL REPORT OF A CP CHECK

rectifier
TANK 1 6000 GALLON SUPER
TANK 2 10000 GALLON UNLEADED
TANK 3 6000 GALLON PLUS
1
TANK 4 6000 GALLON UNLEADED
4
7
6
5
2
8
Island
10
9
12
11
13
5
15
14
Island
16
3
Facility ID 0-002357
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IDEAL REPORT OF CP CHECK
Facility ID 0-002357
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IDEAL REPORT OF A CP CHECK

• Current Required
• Minimum Anodes
• Rectifier Voltage
• Groundbed Resistance
• Name of NACE Certified Corrosion Specialist
• Rectifier Data

Facility ID 0-002357
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Corrosion PreventionInterior Lining of Steel
Tanks
INTERIOR LINING
STEEL TANK SHELL
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OUT OF SERVICE TANKS

• All tanks must be removed or permanently
  abandoned within one year after they are taken
  out of service.
• This is to prevent tanks from becoming a problem
  years after they are abandoned.
• Old tanks, abandoned with fuel in them have
  caused many of the problems that we have found to
  date.
• Permanently abandoning a tank requires emptying
  the tank and filling it with an inert material

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TWO METHODS OF PERMANENTLY ABANDONING A TANK

• Remove the tank from the ground
• Tanks must be decommissioned if removed
• Decommissioning facilities must be permitted
• DEQ inspects all removals to determine if the
  site is contaminated with products
• Clean out the tank and fill with an inert material

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REPORTING OF SUSPECTED RELEASES

• Operator must report a suspected release orally
  with 24 hours, whenever
• there are unusual operating conditions such as
  erratic behavior o dispensing equipment, water in
  the tank, or sudden loss of product from the
  tank.
• there is a discovery of products in the
  surrounding area, such as vapors in basements,
  storm drains or utility lines.
• any monitoring result indicates a loss of product

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RELEASE INVESTIGATION AND CONFIRMATION
SEE CHAPTER 17, SECTIONS 21, 16(C) AND 17(B)
TESTS
WHEN THERE IS A SUSPECTED RELEASE, OWNERS MUST
TEST BOTH.
AND THE LINES
THE TANKS
OWNERS MUST
REPAIR
REPLACE
UPGRADE, OR
PERMANENTLY CLOSE
ANY TANK FOR WHICH A RELEASE IS CONFIRMED
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