WA UST Site Assessor Exam
complete with verified
solutions already graded A+
(solved & updated)
What is the hold time for soil and preserved GW GRO samples? - answer 14
days
Is an ICC certification needed to install an AST? - answer No
Flammability limits of gasoline - answer 1.4 to 7.6%
How many days do you have from a tank closure to report/provide the UST
checklist to ECY? - answer 30 days
MTCA Method A lead CUL, soil - answer 250 mg/kg
MTCA Method A lead CUL, GW - answer 15 ug/L
Is the vadose zone saturated or unsaturated? - answer Unsaturated
List in order of most mobile to least mobile: Bunker C, heating oil, diesel,
gasoline - answer Gasoline, diesel, heating oil, Bunker C
Is oxygenated gasoline more or less likely to dissolve in water? - answer
More likely; fuel additives like MTBE are more soluble than gasoline
Where to sample on dispenser? - answer 2 feet below where the piping
enters the UST
, Where to sample along piping? - 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? - answer 3; 1 upgradient,
2 downgradient
What vapor is an FID used to measure? - answer Methane
What is a PID measuring? - answer Mixture of all volatiles
What conditions might impede a PID? - answer Moisture/humidity, dust,
transformers, power lines
What UST capacity does not require a site assessment at closure? - answer
Less than 110 gallons
Purpose of a site check - answer 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 - answer To investigate a UST site at the
time of closure or change-in-service to determine if a release has occurred
Site check vs. site assessment - answer A site check is an investigation of
a UST site for a release when evidence indicates that one many have
occurred; a site assessment determines if a release has occurred
If a confirmed release is identified and reported within 24 hours, what is
and is not required? - answer A site assessment is not required; a site
characterization is required
complete with verified
solutions already graded A+
(solved & updated)
What is the hold time for soil and preserved GW GRO samples? - answer 14
days
Is an ICC certification needed to install an AST? - answer No
Flammability limits of gasoline - answer 1.4 to 7.6%
How many days do you have from a tank closure to report/provide the UST
checklist to ECY? - answer 30 days
MTCA Method A lead CUL, soil - answer 250 mg/kg
MTCA Method A lead CUL, GW - answer 15 ug/L
Is the vadose zone saturated or unsaturated? - answer Unsaturated
List in order of most mobile to least mobile: Bunker C, heating oil, diesel,
gasoline - answer Gasoline, diesel, heating oil, Bunker C
Is oxygenated gasoline more or less likely to dissolve in water? - answer
More likely; fuel additives like MTBE are more soluble than gasoline
Where to sample on dispenser? - answer 2 feet below where the piping
enters the UST
, Where to sample along piping? - 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? - answer 3; 1 upgradient,
2 downgradient
What vapor is an FID used to measure? - answer Methane
What is a PID measuring? - answer Mixture of all volatiles
What conditions might impede a PID? - answer Moisture/humidity, dust,
transformers, power lines
What UST capacity does not require a site assessment at closure? - answer
Less than 110 gallons
Purpose of a site check - answer 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 - answer To investigate a UST site at the
time of closure or change-in-service to determine if a release has occurred
Site check vs. site assessment - answer A site check is an investigation of
a UST site for a release when evidence indicates that one many have
occurred; a site assessment determines if a release has occurred
If a confirmed release is identified and reported within 24 hours, what is
and is not required? - answer A site assessment is not required; a site
characterization is required
