AUST Overview for Website

Information about AUST Overview for Website

Published on November 6, 2007

Author: Esteban

Source: authorstream.com

Content

THE WYOMING Storage Tank Program :  THE WYOMING Storage Tank Program BEFORE THE 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::  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... Requirements for Underground Storage Tanks:  Requirements for Underground Storage Tanks 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 REQUIRED BY ARTICLE 14, ENVIRONMENTAL QUALITY ACT AND CHAPTER 17 Annual Registration:  Annual Registration Name and Address of Owner/Operator Location, size, & types of Tanks Type of Substance Stored FOR MORE INFO... REQUIRED BY W.S. 35-11-1425 and CHAPTER 17, SECTION 7 (B) Tank Fees:  Tank Fees 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 REQUIRED BY W.S. 35-11-1425 Leak Detection:  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. Leak Detection Methods - Tanks :  Leak Detection Methods - Tanks Manual Tank Gauging Inventory Control Tank Tightness Testing Automatic Tank Gauging Statistical Inventory Reconciliation Interstitial Monitoring Vapor Monitoring Wells Groundwater Monitoring Wells REQUIRED BY CHAPTER 17 SECTION 14(a) deq: Need a Hotlink on each of these MANUAL TANK GAUGING:  MANUAL TANK GAUGING 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 REQUIREMENTS FOR THIS METHOD ARE IN CHAPTER 17 SECTION 16(b) MANUAL TANK GAUGING:  MANUAL TANK GAUGING 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 REQUIREMENTS FOR THIS METHOD ARE IN CHAPTER 17 SECTION 16 (b) INVENTORY CONTROL:  INVENTORY CONTROL 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” REQUIREMENTS FOR THIS METHOD ARE IN CHAPTER 17 SECTION 16 (a) INVENTORY CONTROL:  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:  TANK TIGHTNESS TESTING Provided by an outside company Types: Underfill Overfill Ullage Tracer Tight Surveys Underfill Tank Tightness Tests:  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... Overfill Tank Tightness Tests:  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... Ullage Tank Tightness Tests:  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... Tracer Tight Tank Surveys:  Tracer Tight Tank Surveys About a week later, the tester returns to try and find the tracer in the soils around tank tanks and/or lines. 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. Automatic Tank Gauges:  Automatic Tank Gauges 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: REQUIREMENTS FOR THIS METHOD ARE IN CHAPTER 17 SECTION 16 (d) Automatic Tank Gauges:  Automatic Tank Gauges Product Level Magnetic Float on Rigid Tape Magnets Sensor Detects Torque in Tape to Float REQUIREMENTS FOR THIS METHOD ARE IN CHAPTER 17 SECTION 16 (d) Automatic Tank Gauges:  Automatic Tank Gauges Sensor Measures Buoyancy Force Glass Float Shaped to Account for the Round Tank Product Level REQUIREMENTS FOR THIS METHOD ARE IN CHAPTER 17 SECTION 16 (d) Automatic Tank Gauges:  Automatic Tank Gauges Product Level Ultrasonic Transmitter Sensor Receives Ultrasonic Wave and Determines Product Level REQUIREMENTS FOR THIS METHOD ARE IN CHAPTER 17 SECTION 16 (d) Automatic Tank Gauges:  Automatic Tank Gauges 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. REQUIREMENTS FOR THIS METHOD ARE IN CHAPTER 17 SECTION 16 (d) Statistical Inventory Reconciliation:  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:  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:  Interstitial Monitoring Monitoring of the space between the two shells of a double wall tank for both products and water REQUIREMENTS FOR THIS METHOD ARE IN CHAPTER 17 SECTION 16 (g) Interstitial Monitoring:  Interstitial Monitoring 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. REQUIREMENTS FOR THIS METHOD ARE IN CHAPTER 17 SECTION 16 (g) Vapor Monitoring Wells:  Vapor Monitoring Wells Tank Basin Tank Water Table Monitoring Wells Wells must be monitored for vapors at least monthly REQUIREMENTS FOR THIS METHOD ARE IN CHAPTER 17 SECTION 16 (e) Vapor Monitoring Wells:  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:  Groundwater Monitoring Wells Tank Basin Tank Water Table Monitoring Wells Wells must be monitored at least monthly for free product REQUIREMENTS FOR THIS METHOD ARE IN CHAPTER 17 SECTION 16 (f) Leak Detection Methods - Lines:  Leak Detection Methods - Lines Pressurized Lines Pressure Check of the Lines - Annually Automatic Line Leak Detector (ALLD) Annual Check of the ALLD Suction Lines Exposed Lines The Wyoming Water Quality Division, AUST Program, 122 West 25th Street, Cheyenne, WY 82002 (307) 777-7095 (307) 777-5973 (FAX) and [email protected] FOR MORE INFORMATION... REQUIRED BY CHAPTER 17 SECTION 14 (b) PRESSURIZED LINES:  PRESSURIZED LINES All systems which use pressurized lines must have an automatic line leak detector (ALLD) REQUIRED BY CHAPTER 17 SECTION 14 (b) and SECTION 17 ALLD 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 Tank SUCTION LINES:  SUCTION LINES All systems which use suction pumps AND have no pressure on the lines. These systems cannot have to have an (ALLD) SEE CHAPTER 17 SECTION 14 (b)(ii) 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) Tank CHECK VALVE Minimum Site Assessment:  Minimum Site Assessment 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 Tank Basin Drill hole or test pit REQUIREMENTS FOR MSA’S ARE IN CHAPTER 17 SECTION 27 Financial Assurance:  Financial Assurance $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 REQUIRED BY W.S. 35-11-1428 CORRECTIVE ACTION ACCOUNT:  CORRECTIVE ACTION ACCOUNT 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. SET UP BY W.S. 35-11-1425 Financial Responsibility Account:  Financial Responsibility Account 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 SET UP BY W.S. 35-11-1427 1998 UPGRADES:  1998 UPGRADES Overfill Protection Spill Prevention Corrosion Prevention REQUIRED BY CHAPTER 17, SECTION 5 AND SECTION 6 Overfill Prevention Equipment:  Overfill Prevention Equipment Three Types of Overfill Prevention: Butterfly Valve in Fill Tube Check Valve in Vent Lines Automatic Alarm System SEE CHAPTER 17 SECTION 5 (C)(I)(B) Spill Prevention Equipment:  Spill Prevention Equipment Tank FILL TUBE SPILL BUCKET A spill bucket is designed to catch spills during the filling of the tank SEE CHAPTER 17 SEC 5(C)(I)(A) Corrosion Prevention:  Corrosion Prevention Non Corrodable Tanks and Lines Steel Tanks and Lines Sacrificial anode cathodic protection Impressed Current cathodic protection Fiberglass Clading Lining SEE CHAPTER 17 SEC 5(A) Corrosion Prevention Non Corrodable Tanks:  Corrosion Prevention Non Corrodable Tanks NON-CORRODABLE TANKS ARE MADE ENTIRELY OF FIBERGLASS REINFORCED PLASTIC OR... SEE CHAPTER 17 SEC 5 (A)(I) THEY ARE MADE OF STEEL WHICH HAS BEEN COMPLETELY CLAD WITH A SECOND TANK MADE OF FIBERGLASS REINFORCED PLASTIC (COMPOSIT STEEL/FIBERGLASS TANK) Corrosion Prevention Composite Steel/Fiberglass Tanks:  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:  Corrosion Prevention Cathodic Protection of Steel Tanks SACRIFICIAL ANODES MUST BE CHECKED BY A CATHODIC PROTECTION TESTER ONCE WITHIN SIX MONTHS OF INSTALLATION AND AGAIN ONCE EVERY THREE YEARS THEREAFTER SACRIFICIAL ANODE OR IMPRESSED CURRENT SYSTEMS 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 Corrosion Prevention Cathodic Protection of Steel Tanks:  Corrosion Prevention Cathodic Protection of Steel Tanks TANK SACRIFICIAL ANODES LINES -.85 VOLTS -.85 VOLTS STI-P3 TANKS HAVE DIELECTRIC FITTING SACRIFICIAL ANODE SYSTEM POTENTENTIAL DIFFERENCES MUST BE: OR 200 MILLIVOLTS ABOVE BACKGROUND SEE CHAPTER 17 SECTION 9 Corrosion Prevention Cathodic Protection of Steel Tanks:  Corrosion Prevention Cathodic Protection of Steel Tanks TANK NON-SACRIFICIAL ANODES LINES -.85 VOLTS OR 200 MILLIVOLTS ABOVE BACKGROUND POTENTIAL IMPRESSED CURRENT SYSTEM RECTIFIER POTENTIAL BETWEEN THE TANK, LINES AND ANODES MUST BE: SEE CHAPTER 17 SECTION 9 CRITERIA REQUIRED FOR CP CHECKS:  CRITERIA REQUIRED FOR CP CHECKS 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”. SEE CHAPTER 17, SECTION 9(b), Wyoming Water Quality Rules and Regulations CP EXPERT vs. CP TESTER:  CP EXPERT vs. CP TESTER 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 SEE CHAPTER 17, SECTION 4(K) AND 4(O) Wyoming Water Quality Rules IDEAL REPORT OF A CP CHECK:  IDEAL REPORT OF A CP CHECK TANK 1: 6000 GALLON SUPER TANK 2: 10000 GALLON UNLEADED TANK 3: 6000 GALLON PLUS TANK 4: 6000 GALLON UNLEADED rectifier Island Island 8 7 6 5 5 4 3 2 1 10 9 11 13 12 16 15 14 Facility ID 0-002357 IDEAL REPORT OF CP CHECK:  IDEAL REPORT OF CP CHECK Facility ID 0-002357 IDEAL REPORT OF A CP CHECK:  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:  Corrosion Prevention Interior Lining of Steel Tanks STEEL TANK SHELL INTERIOR LINING OUT OF SERVICE TANKS:  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:  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:  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:  RELEASE INVESTIGATION AND CONFIRMATION TESTS WHEN THERE IS A SUSPECTED RELEASE, OWNERS MUST TEST BOTH…. SEE CHAPTER 17, SECTIONS 21, 16(C) AND 17(B) THE TANKS AND THE LINES OWNERS MUST: REPAIR REPLACE UPGRADE, OR PERMANENTLY CLOSE ANY TANK FOR WHICH A RELEASE IS CONFIRMED

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