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UST OPERATOR CLASS A EXAM QUESTIONS WITH
ACCURATE SOLUTIONS
Cathodic protection -- Answer โโ a technique used to control the corrosion of a metal surface by making it the cathode of an electrochemical cell. A simple method of protection connects the metal to be protected to a more easily corroded "sacrificial metal" to act as the anode. How long do owners and operators have to report a release to the implementing agency? -- Answer โโ 24 Hours True or False? Tanks from 1001 gallons to 2000 gallons and tanks from 551 and 1000 gallons that do not meet the specified diameters can temporarily use manual tank gauging when it is combined with tank tightness testing. -- Answer โโ True True or False? Under UST regulation combining manual tank testing and tank tightness testing can only be used for 10 years after the tank was installed and may not be used for any tanks installed after April 11 2016. -- Answer โโ True True or False? Manual tank gauging can be used to meet the release detection monitoring requirements for any size of tank. -- Answer โโ False True or False?
Owners and operators may cancel a financial responsibility mechanism at any time. -- Answer โโ False When can an owner or operator cancel a financial responsibility mechanism? Only when they have obtained an alternative mechanism; the tank has been permanently closed or undergoes a change in service; or if corrective action is required and completed. -- Answer โโ Only when they have obtained an alternative mechanism; the tank has been permanently closed or undergoes a change in service; or if corrective action is required and completed. True or False? Owners and operators do not need to maintain financial responsibility once the UST has been permanently closed. -- Answer โโ True True or false? Septic tanks are regulated by the 40 CFR part 280. -- Answer โโ False Owners and operators who switch from E10 to E15 have 30 days AFTER switching to notify the implementing agency. -- Answer โโ False They have 30 days BEFORE Which of the following substances if stored in an UST would cause the UST to be regulated under 40 CFR part 280? Choose all that apply:
- Gasoline with 10% ethanol
- Propane
- Diesel
- Kerosene -- Answer โโ gasoline with 10% ethanol, diesel, and kerosene.
True or false? For tanks installed after April 11th 2016 continuous in tank monitoring is an allowable form of release detection. -- Answer โโ False. Must be secondarily contained and use interstitial monitoring. True or false? Owners and operators must ensure the volume available in the tank is greater than the volume of the product to be transferred to the tank, -- Answer โโ True Which overfill prevention equipment may be installed after October 13, 2015? -- Answer โโ High level alarm and automatic shutoff device. True or false? Owners and operators do not have to maintain corrosion protection during temporary closure if the UST is empty. -- Answer โโ False Which class operator initially addresses emergencies presented by a spill or release from an UST system? -- Answer โโ Class C How many operators must be trained? -- Answer โโ 3 Which piping option does not meet the corrosion protection requirement? -- Answer โโ Galvanized piping What most owners and operators do if their UST fails the internal lining inspection and cannot be repaired according to a code of practice? -- Answer โโ Permanently close the UST True or false? Owners and operators do not have to report a suspected release if a release detection false alarm occurs -- Answer โโ True
As stated in the federal UST regulation a spill or overflow of how many gallons that results in release of petroleum to the environment must be reported to the implementing agency. -- Answer โโ Greater than 25 gallons T or F: Tanks must be welded steel tanks? -- Answer โโ True Secondary containment -- Answer โโ - All regulated ASTs must have secondary containment with at least 110% of storage capacity of the largest single AST within the secondary containment wall.
- Must be free of floating oils.
- Fireproof
- Compatible with regulated substance stored Vehicle Impact Protection -- Answer โโ Must be:
- Protected against vehicle impact by barriers
- Guard posts, concrete filled steel no more than 4 feet apart
- secondary containment walls that are at least 5 feet from the tanks, 3 feet above ground level
- Jersey barriers 3 Methods of Corrosion protection -- Answer โโ At least one method must be used
- Sacrificial/Galvanic Anode CP System
- Impressed Current CP System
- Isolation Both Sacrificial/Galvanic Anode CP System shall be designed and installed.... -- Answer โโ With test stations that allow owners/operators to monitor the operation of the CP system Overfill Protection -- Answer โโ System will sound alarm at 90% full.
Is this statement true or false? Owners and operators have 30 days to respond to an active alarm on their automatic tank gauging console. -- Answer โโ Respond immediately and report suspected release within 24 hours. Is this statement true or false? Owners an extra 10 days after the 30 day release detection activity for SIR to determine whether the UST system is leaking. -- Answer โโ False, only 30 days Is this statement true or false? Owners and operators may use groundwater monitoring bailers to check groundwater monitoring wells every 30 days to meet the release detection requirement. -- Answer โโ True Is this statement true or false? Owners and operators may cancel a financial responsibility mechanism at any time. -- Answer โโ False, only if they have obtained an alternative mechanism, tank is closed, or undergoes a change in service, or if corrective action is required and completed Is this statement true or false? Owners and operators do not have to maintain financial responsibility once the UST has been permanently closed. -- Answer โโ Is this statement true or false? 40 CFR part 280 regulates USTs storing petroleum and hazardous substance USTs. -- Answer โโ True Is this statement true or false? If a dispenser was installed after April 2016 it is required to have under dispenser containment. -- Answer โโ True Containment sumps contain of the following -- Answer โโ under dispenser containment, submersible turbine pump sump, transition sump
What tanks require over fill protection? -- Answer โโ Tanks that hold 25 gallons or more True or False? All tanks and piping must have corrosion protection -- Answer โโ True Anode: -- Answer โโ More positive potential. Area where corrosion occurs. Cathode: -- Answer โโ More negative potential Electrolyte: -- Answer โโ Soil or water. Electrical path: -- Answer โโ The tank/pipe Must have what 3 things for corrosion to occur -- Answer โโ Anode, Cathode electrical path What tanks/piping do not need corrosion protection? -- Answer โโ Clad steel, jacketed steel, fiberglass reinforced plastic or non metallic materials in contact with soil. Tanks that do need corrosion protection -- Answer โโ Bare steel, Steel flex connectors associated with piping Methods used in Corrosion protection -- Answer โโ 1. Cathodic
- Sacrificial anodes
- impressed current
- Internal tank lining
- Combination of 1 & 2 cathodic protection -- Answer โโ A technique for preventing corrosion by making the entire surface of the metal to be protected and act as the cathode of an electrochemical cell.
Disadvantages of an impressed current system -- Answer โโ - May cause interference or problems on foreign structures
- The current may be switched to off and protection temporarily eliminated
- Systems must be monitored and maintained on a regular schedule
- Maintenance and operating costs are relatively higher.
- Requires continuous power T or F? All impressed current tanks must have a reading of - 850mV to pass -- Answer โโ True Internally Lined Tank Steel Inspections are required: -- Answer โโ - Within 10 years of lining
- Every 5 years after Only exception IF: 1 Cathodic protection is added before the lining is 10 years old AND integrity is ensured when cathodic protection is installed Testing requirements for sacrificial anode systems: -- Answer โโ - Within 6 months of installation/repair
- At least every three years
- Maintain record of the last 2 CP tests Testing for impressed current systems: -- Answer โโ - Within 6 months of installation/repair
- At least every three years
- Rectifier inspected every 60 days
- Maintain record of last 2 CP Tests and 3 Rectifier readings What is the difference between sacrificial anode and impressed current cathodic protection? -- Answer โโ - Sacrificial systems consist of anodes sacrificing themselves to protect the tank or piping (Cathode). No external power.
- Impressed current has rectifier supplying external power through anodes to protect the tank or piping. Release detection: -- Answer โโ Must be able to detect a release from any portion of the tank or underground piping that routinely contains product. Release detection and performance requirements -- Answer โโ - Must be installed, calibrated, operated, and maintained to the manufacturers instructions
- Must have documentation the release detection equipment can meet performance requirements Leak rates -- Answer โโ - 0.1 monthly tank tightness
- 0.2 gallons per hour: monthly release detection
- 3.0 catastrophic leak rate Is this statement true or false? Internal linings may be installed after October 13, 2015 to meet the corrosion protection upgrade. -- Answer โโ False Fill in the blank to make the statement correct. Owners and Operators must keep the most recent ___ records of cathodic protection testing. -- Answer โโ 2 Fill in the blank if the tank was installed on or before April 11, 2016 manual tank gauging ALONE can be used on tanks containing ________ gallons and meeting certain diameter requirements? -- Answer โโ 1000 gallons or less. Is this statement true or false? Fiberglass and flexible plastic piping do not need to have cathodic protection. -- Answer โโ False.
