Transcript THE WYOMING Aboveground & Underground Storage Tank PROGRAM
THE WYOMING
Storage Tank Program
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
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 (307) 777-7095 and (307) 777-5973 (FAX) and [email protected]
You will find references to Wyoming State regulations and statutes in this space >> 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.
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
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 (307) 777-5973 (FAX) and [email protected]
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
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.
deq:
each of these
Leak Detection Methods - Tanks
REQUIRED BY CHAPTER 17 SECTION 14(a)
Statistical Inventory Reconciliation
Groundwater Monitoring Wells
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
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
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”
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.
TANK TIGHTNESS TESTING
Provided by an outside company Types: • Underfill • • • Overfill Ullage Tracer Tight Surveys
Underfill Tank Tightness Tests
The tank is first filled to near its capacity...
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.
Overfill Tank Tightness Tests
The tank is first filled to the top...
In the Over fill method, a tube is connected to the tank to accurately measure product level during a shut-in period.
Ullage Tank Tightness Tests
The ullage is the space in the tank above the product level...
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.
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.
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:
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
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
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
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.
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.
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 don’t have a valid leak detection method for that month
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
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.
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
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.
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 Basin Tank
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 (307) 777-5973 (FAX) and [email protected]
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
Tank
SOLENOID VALVE
ALLD’s only detect leaks between the solenoid valve in the dispenser and the ALLD itself All ALLD’s must detect any leak of 3 gallons per hour at 10 psi within one hour
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
Tank
Systems which have only one check valve are exempt from release detection requirements (Exempt Suction) Systems which have a second check valve are not exempt (US Suction)
Minimum Site Assessment
REQUIREMENTS FOR MSA’S ARE IN CHAPTER 17 SECTION 27
Number of Drill holes or Test Pits depends on size and number of tanks Tank Basin Drill hole or test pit 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
Financial Assurance
$1,000,000 liability per release • (Federal Requirement) •
REQUIRED BY W.S. 35-11-1428
$30,000 deductible Compliance with the AUST Program makes a site eligible for the: • • Wyoming Corrective Action Account Wyoming Financial Responsibility Account
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.
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
1998 UPGRADES
REQUIRED BY CHAPTER 17, SECTION 5 AND SECTION 6
Overfill Protection
Spill Prevention
Corrosion Prevention
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
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
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
Corrosion Prevention
Non Corrodable Tanks
SEE CHAPTER 17 SEC 5 (A)(I) PLASTIC
(COMPOSIT STEEL/FIBERGLASS TANK)
Corrosion Prevention
Composite Steel/Fiberglass Tanks
STEEL TANK SHELL FIBERGLASS SHELL
Composite Tanks may or may not have an interstitial space between the steel and the fiberglass shells The fiberglass shell is more than a coating, it is a complete tank in and of itself.
Corrosion Prevention
Cathodic Protection of Steel Tanks
SACRIFICIAL ANODE OR IMPRESSED CURRENT SYSTEMS
THEREAFTER
Corrosion Prevention
Cathodic 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
Corrosion Prevention
Cathodic 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
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”.
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
IDEAL REPORT OF A CP CHECK
rectifier 1 5 2 8 11 12 9 13 10 3 14 15 6 16 7 5 4 TANK 1: 6000 GALLON SUPER TANK 2: 10000 GALLON UNLEADED TANK 3: 6000 GALLON PLUS TANK 4: 6000 GALLON UNLEADED Island Island Facility ID 0-002357
IDEAL REPORT OF CP CHECK
POINT ID 1 DESCRIPTION ANODE 4 2 3 ANODE 5 TANK 3 4 ETC.
LINE 4 ON OFF -.540 -1.063
-.536 -1.034
-.554 -1.067
-.560 -1.098
Facility ID 0-002357
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
Corrosion Prevention
Interior Lining of Steel Tanks
INTERIOR LINING STEEL TANK SHELL
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
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
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
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