WA UST Site Assessor Exam 2024 (A+ GRADED)

What is the hold time for soil and preserved GW GRO samples? correct answers 14 days Is an ICC certification needed to install an AST? correct answers No Flammability limits of gasoline correct answers 1.4 to 7.6% How many days do you have from a tank closure to report/provide the UST checklist to ECY? correct answers 30 days MTCA Method A lead CUL, soil correct answers 250 mg/kg MTCA Method A lead CUL, GW correct answers 15 ug/L Is the vadose zone saturated or unsaturated? correct answers Unsaturated List in order of most mobile to least mobile: Bunker C, heating oil, diesel, gasoline correct answers Gasoline, diesel, heating oil, Bunker C Is oxygenated gasoline more or less likely to dissolve in water? correct answers More likely; fuel additives like MTBE are more soluble than gasoline Where to sample on dispenser? correct answers 2 feet below where the piping enters the UST Where to sample along piping? correct 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? correct answers 3; 1 upgradient, 2 downgradient What vapor is an FID used to measure? correct answers Methane What is a PID measuring? correct answers Mixture of all volatiles What conditions might impede a PID? correct answers Moisture/humidity, dust, transformers, power lines What UST capacity does not require a site assessment at closure? correct answers Less than 110 gallons Purpose of a site check correct answers To investigate a UST site for the presence of a release when evidence indicated that a release may have occurred Purpose of a site assessment correct answers To investigate a UST site at the time of closure or change-in-service to determine if a release has occurred