Federal Regulation governing UST - ANSWER40 CFR 280
API - ANSWERAmerican Petroleum Institute
UST partially deferred from regulatory requirements - ANSWERradioactive material
UST part of emergency generator at nuclear fac.
airport hydrant fuel system
field constructed UST system
What cre...
UST partially deferred from regulatory requirements - ANSWERradioactive material
UST part of emergency generator at nuclear fac.
airport hydrant fuel system
field constructed UST system
What created the Federal UST program - ANSWERSubtitle I of the 1984 Hazadous and Solid Waste
Amendments of the RCRA
Purpose of UST Regulation - ANSWERPrevent
Detect
Correct
Financial ability
Interstatial Monitoing - ANSWERmethod that detects leaks in the space between UST and the second
barrier.
How does the leak detection work with secondary containment method? - ANSWERThe 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.
How often is the interstitial monitoring checked? - ANSWERat least once every 30 days.
where should the barrier be located? - ANSWERimmediately around or beneath the tank
, Automatic Tank Gauging System (ATG) - ANSWERmethod that uses automated processes to monitor
product level and inventory level.
In inventory mode, what does the ATG replace? - ANSWERreplaced the gauge stick to measure
product level and perform inventory control.
True or False: the tank is taken out of service and level/temp are mesured for an hour. - ANSWERTrue
How many gallons per hour must the ATG system be able to detect? - ANSWER0.2 gallons per hour.
ATG systems are equipt with what kind of alarms? - ANSWERhigh and low product level, high water
level and theft
Leaked petroleum produces vapors that can be detected through what? - ANSWERsoil gas
How many monitoring wells should be dug to monitor vapors? - ANSWERminimum of 2 wells for 1
tank
three or more wells for two or more.
What kind of back fill must be used to help move/detect vapors? - ANSWERsand, gravel, or any other
other material that allows the movement of vapors.
How often are groundwater monitoring wells checked? - ANSWERat least monthly for
leakage/surface sheen
The main two components of groundwater monitoring system: - ANSWERmonitoring well (2-4 inches
in diameter)
monitoring device
How often are manual water monitoring devices used? - ANSWERat least once a month
When can groundwater monitoring devices be used? - ANSWERonly when the stored substance does
not easily mix with water AND floats on top.
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