WA UST SITE ASSESSOR(2024-2025) EXAM
QUESTIONS WITH ANSWERS
Site check vs. site assessment - <<,Answersw>>>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? - <<,Answersw>>>A site
assessment is not required; a site characterization is required
What is the historical date before which a UST system may
have been permanently closed or abandoned that ECY may
require a site assessment? - <<,Answersw>>>December 22,
1988
When should a site safety plan be developed? -
<<,Answersw>>>Prior to conducting the UST site assessment
What are the three points of the fire triangle? -
<<,Answersw>>>Oxygen, fuel, and a source of ignition
Flash point - <<,Answersw>>>Minimum temperature at
which a substance gives off enough vapors to support a flame
when an ignition source is present
How is explosivity expressed? - <<,Answersw>>>As a
percentage of a given material in a volume of air
, WA UST SITE ASSESSOR(2024-2025) EXAM
QUESTIONS WITH ANSWERS
Lower Explosive Limit (LEL) - <<,Answersw>>>the lowest
concentration of vapor in air that is explosive
What does EPA consider the minimum % of oxygen for safe
entry? - <<,Answersw>>>19.5%
Confined space - <<,Answersw>>>Any topped space 4+ feet
in depth
"Abandoned" - <<,Answersw>>>A tank that is unused
indefinitely, without being substantially emptied or
permanently altered structurally to prevent reuse
"Decommissioning" - <<,Answersw>>>To take an
underground storage tank out of operation, either temporarily
or permanently, in accordance with WAC 173-360-380 or
173-360-385
What is "decommissioning" synonymous with? -
<<,Answersw>>>Closure
"De minimis concentration" (two definitions) -
<<,Answersw>>>less than one inch of regulated substance, or
less than a reportable quantity, as defined under CERCLA
QUESTIONS WITH ANSWERS
Site check vs. site assessment - <<,Answersw>>>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? - <<,Answersw>>>A site
assessment is not required; a site characterization is required
What is the historical date before which a UST system may
have been permanently closed or abandoned that ECY may
require a site assessment? - <<,Answersw>>>December 22,
1988
When should a site safety plan be developed? -
<<,Answersw>>>Prior to conducting the UST site assessment
What are the three points of the fire triangle? -
<<,Answersw>>>Oxygen, fuel, and a source of ignition
Flash point - <<,Answersw>>>Minimum temperature at
which a substance gives off enough vapors to support a flame
when an ignition source is present
How is explosivity expressed? - <<,Answersw>>>As a
percentage of a given material in a volume of air
, WA UST SITE ASSESSOR(2024-2025) EXAM
QUESTIONS WITH ANSWERS
Lower Explosive Limit (LEL) - <<,Answersw>>>the lowest
concentration of vapor in air that is explosive
What does EPA consider the minimum % of oxygen for safe
entry? - <<,Answersw>>>19.5%
Confined space - <<,Answersw>>>Any topped space 4+ feet
in depth
"Abandoned" - <<,Answersw>>>A tank that is unused
indefinitely, without being substantially emptied or
permanently altered structurally to prevent reuse
"Decommissioning" - <<,Answersw>>>To take an
underground storage tank out of operation, either temporarily
or permanently, in accordance with WAC 173-360-380 or
173-360-385
What is "decommissioning" synonymous with? -
<<,Answersw>>>Closure
"De minimis concentration" (two definitions) -
<<,Answersw>>>less than one inch of regulated substance, or
less than a reportable quantity, as defined under CERCLA
