Federal Regulation governing UST - answer-40 CFR 280
API - answer-American Petroleum Institute
UST partially deferred from regulatory requirements - answer-radioactive material
UST part of emergency generator at nuclear fac.
airport hydrant fuel system
field constructed UST system
What ...
UST partially deferred from regulatory requirements - answer-radioactive material
UST part of emergency generator at nuclear fac.
airport hydrant fuel system
field constructed UST system
What created the Federal UST program - answer-Subtitle I of the 1984 Hazadous
and Solid Waste Amendments of the RCRA
Purpose of UST Regulation - answer-Prevent
Detect
Correct
Financial ability
Interstatial Monitoing - answer-method that detects leaks in the space between UST
and the second barrier.
How does the leak detection work with secondary containment method? - answer-
The 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? - answer-at least once every 30
days.
where should the barrier be located? - answer-immediately around or beneath the
tank
Automatic Tank Gauging System (ATG) - answer-method that uses automated
processes to monitor product level and inventory level.
In inventory mode, what does the ATG replace? - answer-replaced 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. - answer-True
How many gallons per hour must the ATG system be able to detect? - answer-0.2
gallons per hour.
ATG systems are equipt with what kind of alarms? - answer-high and low product
level, high water level and theft
, Leaked petroleum produces vapors that can be detected through what? - answer-
soil gas
How many monitoring wells should be dug to monitor vapors? - answer-minimum 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? - answer-sand,
gravel, or any other other material that allows the movement of vapors.
How often are groundwater monitoring wells checked? - answer-at least monthly for
leakage/surface sheen
The main two components of groundwater monitoring system: - answer-monitoring
well (2-4 inches in diameter)
monitoring device
How often are manual water monitoring devices used? - answer-at least once a
month
When can groundwater monitoring devices be used? - answer-only when the stored
substance does not easily mix with water AND floats on top.
What is Statistical Inventory Reconcilitation (SIR)? - answer-computer software that
does a statistical analysis of inventory, delivery and dispensing data.
The SIR system has the ability to detect leaks up to - answer-0.2 gallons per hour.
Even using the SIR system, you still have to do what everyday - answer-product is
measured with gauge stick or other level monitor, and then reported when required.
For the SIR to be equivalent to the tank tightness testing, it must be able to detect
to what? - answer-0.1 gallons per hour.
How often is a tank tightness test done? - answer-every 5 years, BUT up to 10 years
Once the 10 year mark is reached for new tanks the requirement is change to: -
answer-you must use one of the monthly monitoring methods for leak detection.
Tanks 2,000 gallons may use what type of gauging? - answer-Manual gauging,either
by itself OR in combination with tank tighness testing and only for 10 years.
Tanks 1,000 gallons can use what type of testing as a sole method? - answer-
manual tank gauging
Two types of piping on UST's - answer-Suction piping and pressurized piping.
how often must a line tightness test be preformed on a suction piping? - answer-
every 3 years
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