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WA UST SITE ASSESSOR EXAM |STUDY REVISION QUESTION 2025|26 |GUARANTEED ACCURATE ANSWERS |VERIFIED |LATEST VERSION

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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, Bunk

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May 8, 2025
Number of pages
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Written in
2024/2025
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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

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