WA UST Site Assessor Exam
Questions With Correct Answers!!
How long should written documentation of all calibration maintenance, and repair of
release detection equipment be maintained? - ANSWERAt least 5 years after
servicing work is completed
What is the hold time for soil samples? - ANSWER14 days
What is the hold time for preserved GW GRO samples? - ANSWER14 days
What does GRO stand for? - ANSWERGasoline Range Organics
Is an ICC certification needed to install an AST? - ANSWERNo
What does ICC stand for? - ANSWERInternational Code Council
What is the LFL of Gasoline? - ANSWER1.4%
What is the UFL of Gasoline? - ANSWER7.6%
After a tank closure, how many days do you have to report/provide the UST checklist
to ECY? - ANSWER30
What is ECY an abbreviation for? - ANSWERThe Washington State Department of
Ecology
What does CUL stand for? - ANSWERCleanup Level
What is the MTCA Method A lead CUL for soil? - ANSWER250 mg/kg
What is the MTCA Method A lead CUL for GW? - ANSWER15 ug/L
What does MTCA stand for? - ANSWERModel Toxics Control Act
What is the MTCA? - ANSWERWashington's cleanup act. It governs the cleanup
and prevention of contaminated sites that can threaten the health of people and the
environment.
What is the MTCA Method A GRO (without benzene) CUL for soil? - ANSWER100
mg/kg
What is the MTCA Method A GRO (with benzene) CUL for soil? - ANSWER30 mg/kg
What is the MTCA Method A GRO (with benzene) CUL for GW? - ANSWER800 ug/L
, What are MTCA Method A cleanup levels? - ANSWERThe default human health
cleanup levels for soil, groundwater, surface water, air, and vapor intrusion.
What is the MTCA Method A GRO (without benzene) CUL for GW? - ANSWER1,000
ug/L
What is the MTCA Method A DRO and ORO CUL for soil? - ANSWER2,000 mg/kg
What is the MTCA Method A DRO and ORO CUL for GW? - ANSWER500 ug/L
Is the vadose zone saturated or unsaturated? - ANSWERUnsaturated
List the following from most mobile to least mobile: Diesel, Heating Oil, Bunker C oil,
Gasoline - ANSWERGasoline, diesel, heating oil, Bunker C oil
What is the vadose zone? - ANSWERThe portion of the subsurface above the GW
table.
Is oxygenated gasoline more or less likely to dissolve in water? - ANSWERMore
likely
Why is oxygenated gasoline more likely to dissolve in water? - ANSWERFuel
additives like MTBE are more soluble than gasoline.
How many samples are needed during the removal of a UST of less than 9,000
gallons? - ANSWER3
Where do samples need to be collected during the removal of a UST of less than
9,000 gallons? - ANSWEROne beneath the tank, one where the piping entered the
sidewall, and one from another sidewall.
How many samples need to be collected during the removal of a UST of more than
9,000 gallons? - ANSWER?
Where do samples need to be collected during the removal of a UST of more than
9,000 gallons? - ANSWER?
How many samples need to be collected during the removal of multiple USTs? -
ANSWER5 samples for the first UST, 2 additional samples for each additional tank.
Where do samples need to be collected during the removal of multiple USTs? -
ANSWEREvenly spaced around the excavation and beneath each tank.
Where do you sample on the dispenser? - ANSWER2 feet below where the piping
enters the UST.
Where do you sample along the piping? - ANSWEREvery 50 linear feet and along
the joints/elbows.
Questions With Correct Answers!!
How long should written documentation of all calibration maintenance, and repair of
release detection equipment be maintained? - ANSWERAt least 5 years after
servicing work is completed
What is the hold time for soil samples? - ANSWER14 days
What is the hold time for preserved GW GRO samples? - ANSWER14 days
What does GRO stand for? - ANSWERGasoline Range Organics
Is an ICC certification needed to install an AST? - ANSWERNo
What does ICC stand for? - ANSWERInternational Code Council
What is the LFL of Gasoline? - ANSWER1.4%
What is the UFL of Gasoline? - ANSWER7.6%
After a tank closure, how many days do you have to report/provide the UST checklist
to ECY? - ANSWER30
What is ECY an abbreviation for? - ANSWERThe Washington State Department of
Ecology
What does CUL stand for? - ANSWERCleanup Level
What is the MTCA Method A lead CUL for soil? - ANSWER250 mg/kg
What is the MTCA Method A lead CUL for GW? - ANSWER15 ug/L
What does MTCA stand for? - ANSWERModel Toxics Control Act
What is the MTCA? - ANSWERWashington's cleanup act. It governs the cleanup
and prevention of contaminated sites that can threaten the health of people and the
environment.
What is the MTCA Method A GRO (without benzene) CUL for soil? - ANSWER100
mg/kg
What is the MTCA Method A GRO (with benzene) CUL for soil? - ANSWER30 mg/kg
What is the MTCA Method A GRO (with benzene) CUL for GW? - ANSWER800 ug/L
, What are MTCA Method A cleanup levels? - ANSWERThe default human health
cleanup levels for soil, groundwater, surface water, air, and vapor intrusion.
What is the MTCA Method A GRO (without benzene) CUL for GW? - ANSWER1,000
ug/L
What is the MTCA Method A DRO and ORO CUL for soil? - ANSWER2,000 mg/kg
What is the MTCA Method A DRO and ORO CUL for GW? - ANSWER500 ug/L
Is the vadose zone saturated or unsaturated? - ANSWERUnsaturated
List the following from most mobile to least mobile: Diesel, Heating Oil, Bunker C oil,
Gasoline - ANSWERGasoline, diesel, heating oil, Bunker C oil
What is the vadose zone? - ANSWERThe portion of the subsurface above the GW
table.
Is oxygenated gasoline more or less likely to dissolve in water? - ANSWERMore
likely
Why is oxygenated gasoline more likely to dissolve in water? - ANSWERFuel
additives like MTBE are more soluble than gasoline.
How many samples are needed during the removal of a UST of less than 9,000
gallons? - ANSWER3
Where do samples need to be collected during the removal of a UST of less than
9,000 gallons? - ANSWEROne beneath the tank, one where the piping entered the
sidewall, and one from another sidewall.
How many samples need to be collected during the removal of a UST of more than
9,000 gallons? - ANSWER?
Where do samples need to be collected during the removal of a UST of more than
9,000 gallons? - ANSWER?
How many samples need to be collected during the removal of multiple USTs? -
ANSWER5 samples for the first UST, 2 additional samples for each additional tank.
Where do samples need to be collected during the removal of multiple USTs? -
ANSWEREvenly spaced around the excavation and beneath each tank.
Where do you sample on the dispenser? - ANSWER2 feet below where the piping
enters the UST.
Where do you sample along the piping? - ANSWEREvery 50 linear feet and along
the joints/elbows.
