WA UST SITE ASSESSOR EXAM |
STUDY REVISION QUESTION 2025|
26 |GUARANTEED ACCURATE
ANSWERS |VERIFIED |LATEST
VERSION
What is the hold time for soil and preserved GW GRO samples? -
ACCURATE ANSWERS✔✔ 14 days
Is an ICC certification needed to install an AST? - ACCURATE
ANSWERS✔✔ No
Flammability limits of gasoline - ACCURATE ANSWERS✔✔ 1.4 to
7.6%
How many days do you have from a tank closure to report/provide the
UST checklist to ECY? - ACCURATE ANSWERS✔✔ 30 days
MTCA Method A lead CUL, soil - ACCURATE ANSWERS✔✔ 250
mg/kg
MTCA Method A lead CUL, GW - ACCURATE ANSWERS✔✔ 15
ug/L
, Is the vadose zone saturated or unsaturated? - ACCURATE
ANSWERS✔✔ Unsaturated
List in order of most mobile to least mobile: Bunker C, heating oil,
diesel, gasoline - ACCURATE ANSWERS✔✔ Gasoline, diesel, heating
oil, Bunker C
Is oxygenated gasoline more or less likely to dissolve in water? -
ACCURATE ANSWERS✔✔ More likely; fuel additives like MTBE are
more soluble than gasoline
Where to sample on dispenser? - ACCURATE ANSWERS✔✔ 2 feet
below where the piping enters the UST
Where to sample along piping? - ACCURATE ANSWERS✔✔ Every 50
linear feet and along joints/elbows
How many GW samples are needed after decommissioning if a release
to GW is confirmed, and where relative to the tank? - ACCURATE
ANSWERS✔✔ 3; 1 upgradient, 2 downgradient
What vapor is an FID used to measure? - ACCURATE ANSWERS✔✔
Methane
EXAMLINKS
STUDY SMART,
STUDY REVISION QUESTION 2025|
26 |GUARANTEED ACCURATE
ANSWERS |VERIFIED |LATEST
VERSION
What is the hold time for soil and preserved GW GRO samples? -
ACCURATE ANSWERS✔✔ 14 days
Is an ICC certification needed to install an AST? - ACCURATE
ANSWERS✔✔ No
Flammability limits of gasoline - ACCURATE ANSWERS✔✔ 1.4 to
7.6%
How many days do you have from a tank closure to report/provide the
UST checklist to ECY? - ACCURATE ANSWERS✔✔ 30 days
MTCA Method A lead CUL, soil - ACCURATE ANSWERS✔✔ 250
mg/kg
MTCA Method A lead CUL, GW - ACCURATE ANSWERS✔✔ 15
ug/L
, Is the vadose zone saturated or unsaturated? - ACCURATE
ANSWERS✔✔ Unsaturated
List in order of most mobile to least mobile: Bunker C, heating oil,
diesel, gasoline - ACCURATE ANSWERS✔✔ Gasoline, diesel, heating
oil, Bunker C
Is oxygenated gasoline more or less likely to dissolve in water? -
ACCURATE ANSWERS✔✔ More likely; fuel additives like MTBE are
more soluble than gasoline
Where to sample on dispenser? - ACCURATE ANSWERS✔✔ 2 feet
below where the piping enters the UST
Where to sample along piping? - ACCURATE ANSWERS✔✔ Every 50
linear feet and along joints/elbows
How many GW samples are needed after decommissioning if a release
to GW is confirmed, and where relative to the tank? - ACCURATE
ANSWERS✔✔ 3; 1 upgradient, 2 downgradient
What vapor is an FID used to measure? - ACCURATE ANSWERS✔✔
Methane
EXAMLINKS
STUDY SMART,
