WA UST Site Assessor Exam with correct answers

WA UST Site Assessor Exam with correct
answers


What is the hold time for soil and preserved GW GRO samples?
- ...,.🔹VERIFIED ANSWER **✔✔14 days


Is an ICC certification needed to install an AST? - ...,.🔹VERIFIED
ANSWER **✔✔No


Flammability limits of gasoline - ...,.🔹VERIFIED ANSWER
**✔✔1.4 to 7.6%


How many days do you have from a tank closure to report/provide
the UST checklist to ECY? - ...,.🔹VERIFIED ANSWER **✔✔30
days


MTCA Method A lead CUL, soil - ...,.🔹VERIFIED ANSWER
**✔✔250 mg/kg


MTCA Method A lead CUL, GW - ...,.🔹VERIFIED ANSWER





, **✔✔15 ug/L


Is the vadose zone saturated or unsaturated? - ...,.🔹VERIFIED
ANSWER **✔✔Unsaturated


List in order of most mobile to least mobile: Bunker C, heating oil,
diesel, gasoline - ...,.🔹VERIFIED ANSWER **✔✔Gasoline, diesel,
heating oil, Bunker C


Is oxygenated gasoline more or less likely to dissolve in water?
- ...,.🔹VERIFIED ANSWER **✔✔More likely; fuel additives like
MTBE are more soluble than gasoline


Where to sample on dispenser? - ...,.🔹VERIFIED ANSWER
**✔✔2 feet below where the piping enters the UST


Where to sample along piping? - ...,.🔹VERIFIED ANSWER
**✔✔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?