WA UST Site Assessor Exam Questions
with Correct Answers 2025
WhatGisGtheGholdGtimeGforGsoilGandGpreservedGGWGGROGsamples?G-GCORRECTGANSWERG-14Gdays
IsGanGICCGcertificationGneededGtoGinstallGanGAST?G-GCORRECTGANSWERG-No
FlammabilityGlimitsGofGgasolineG-GCORRECTGANSWERG-1.4GtoG7.6%
HowGmanyGdaysGdoGyouGhaveGfromGaGtankGclosureGtoGreport/provideGtheGUSTGchecklistGtoGECY?G-
GCORRECTGANSWERG-30Gdays
MTCAGMethodGAGleadGCUL,GsoilG-GCORRECTGANSWERG-250Gmg/kg
MTCAGMethodGAGleadGCUL,GGWG-GCORRECTGANSWERG-15Gug/L
IsGtheGvadoseGzoneGsaturatedGorGunsaturated?G-GCORRECTGANSWERG-Unsaturated
ListGinGorderGofGmostGmobileGtoGleastGmobile:GBunkerGC,GheatingGoil,Gdiesel,GgasolineG-
GCORRECTGANSWERG-Gasoline,Gdiesel,GheatingGoil,GBunkerGC
IsGoxygenatedGgasolineGmoreGorGlessGlikelyGtoGdissolveGinGwater?G-GCORRECTGANSWERG-
MoreGlikely;GfuelGadditivesGlikeGMTBEGareGmoreGsolubleGthanGgasoline
WhereGtoGsampleGonGdispenser?G-GCORRECTGANSWERG-2GfeetGbelowGwhereGtheGpipingGentersGtheGUST
WhereGtoGsampleGalongGpiping?G-GCORRECTGANSWERG-EveryG50GlinearGfeetGandGalongGjoints/elbows
HowGmanyGGWGsamplesGareGneededGafterGdecommissioningGifGaGreleaseGtoGGWGisGconfirmed,GandGwhere
GrelativeGtoGtheGtank?G-GCORRECTGANSWERG-3;G1Gupgradient,G2Gdowngradient
, WhatGvaporGisGanGFIDGusedGtoGmeasure?G-GCORRECTGANSWERG-Methane
WhatGisGaGPIDGmeasuring?G-GCORRECTGANSWERG-MixtureGofGallGvolatiles
WhatGconditionsGmightGimpedeGaGPID?G-GCORRECTGANSWERG-
Moisture/humidity,Gdust,Gtransformers,GpowerGlines
WhatGUSTGcapacityGdoesGnotGrequireGaGsiteGassessmentGatGclosure?G-GCORRECTGANSWERG-
LessGthanG110Ggallons
PurposeGofGaGsiteGcheckG-GCORRECTGANSWERG-
ToGinvestigateGaGUSTGsiteGforGtheGpresenceGofGaGreleaseGwhenGevidenceGindicatedGthatGaGreleaseGmayGhav
eGoccurred
PurposeGofGaGsiteGassessmentG-GCORRECTGANSWERG-
ToGinvestigateGaGUSTGsiteGatGtheGtimeGofGclosureGorGchange-in-
serviceGtoGdetermineGifGaGreleaseGhasGoccurred
SiteGcheckGvs.GsiteGassessmentG-GCORRECTGANSWERG-
AGsiteGcheckGisGanGinvestigationGofGaGUSTGsiteGforGaGreleaseGwhenGevidenceGindicatesGthatGoneGmanyGhave
Goccurred;GaGsiteGassessmentGdeterminesGifGaGreleaseGhasGoccurred
IfGaGconfirmedGreleaseGisGidentifiedGandGreportedGwithinG24Ghours,GwhatGisGandGisGnotGrequired?G-
GCORRECTGANSWERG-AGsiteGassessmentGisGnotGrequired;GaGsiteGcharacterizationGisGrequired
WhatGisGtheGhistoricalGdateGbeforeGwhichGaGUSTGsystemGmayGhaveGbeenGpermanentlyGclosedGorGabandon
edGthatGECYGmayGrequireGaGsiteGassessment?G-GCORRECTGANSWERG-DecemberG22,G1988
WhenGshouldGaGsiteGsafetyGplanGbeGdeveloped?G-GCORRECTGANSWERG-
PriorGtoGconductingGtheGUSTGsiteGassessment
WhatGisGincludedGunderG"LevelGD"GPPE?G-GCORRECTGANSWERG-
SteelGtoeGboots,GcottonGcoveralls,Ghardhat,GeyeGprotection
with Correct Answers 2025
WhatGisGtheGholdGtimeGforGsoilGandGpreservedGGWGGROGsamples?G-GCORRECTGANSWERG-14Gdays
IsGanGICCGcertificationGneededGtoGinstallGanGAST?G-GCORRECTGANSWERG-No
FlammabilityGlimitsGofGgasolineG-GCORRECTGANSWERG-1.4GtoG7.6%
HowGmanyGdaysGdoGyouGhaveGfromGaGtankGclosureGtoGreport/provideGtheGUSTGchecklistGtoGECY?G-
GCORRECTGANSWERG-30Gdays
MTCAGMethodGAGleadGCUL,GsoilG-GCORRECTGANSWERG-250Gmg/kg
MTCAGMethodGAGleadGCUL,GGWG-GCORRECTGANSWERG-15Gug/L
IsGtheGvadoseGzoneGsaturatedGorGunsaturated?G-GCORRECTGANSWERG-Unsaturated
ListGinGorderGofGmostGmobileGtoGleastGmobile:GBunkerGC,GheatingGoil,Gdiesel,GgasolineG-
GCORRECTGANSWERG-Gasoline,Gdiesel,GheatingGoil,GBunkerGC
IsGoxygenatedGgasolineGmoreGorGlessGlikelyGtoGdissolveGinGwater?G-GCORRECTGANSWERG-
MoreGlikely;GfuelGadditivesGlikeGMTBEGareGmoreGsolubleGthanGgasoline
WhereGtoGsampleGonGdispenser?G-GCORRECTGANSWERG-2GfeetGbelowGwhereGtheGpipingGentersGtheGUST
WhereGtoGsampleGalongGpiping?G-GCORRECTGANSWERG-EveryG50GlinearGfeetGandGalongGjoints/elbows
HowGmanyGGWGsamplesGareGneededGafterGdecommissioningGifGaGreleaseGtoGGWGisGconfirmed,GandGwhere
GrelativeGtoGtheGtank?G-GCORRECTGANSWERG-3;G1Gupgradient,G2Gdowngradient
, WhatGvaporGisGanGFIDGusedGtoGmeasure?G-GCORRECTGANSWERG-Methane
WhatGisGaGPIDGmeasuring?G-GCORRECTGANSWERG-MixtureGofGallGvolatiles
WhatGconditionsGmightGimpedeGaGPID?G-GCORRECTGANSWERG-
Moisture/humidity,Gdust,Gtransformers,GpowerGlines
WhatGUSTGcapacityGdoesGnotGrequireGaGsiteGassessmentGatGclosure?G-GCORRECTGANSWERG-
LessGthanG110Ggallons
PurposeGofGaGsiteGcheckG-GCORRECTGANSWERG-
ToGinvestigateGaGUSTGsiteGforGtheGpresenceGofGaGreleaseGwhenGevidenceGindicatedGthatGaGreleaseGmayGhav
eGoccurred
PurposeGofGaGsiteGassessmentG-GCORRECTGANSWERG-
ToGinvestigateGaGUSTGsiteGatGtheGtimeGofGclosureGorGchange-in-
serviceGtoGdetermineGifGaGreleaseGhasGoccurred
SiteGcheckGvs.GsiteGassessmentG-GCORRECTGANSWERG-
AGsiteGcheckGisGanGinvestigationGofGaGUSTGsiteGforGaGreleaseGwhenGevidenceGindicatesGthatGoneGmanyGhave
Goccurred;GaGsiteGassessmentGdeterminesGifGaGreleaseGhasGoccurred
IfGaGconfirmedGreleaseGisGidentifiedGandGreportedGwithinG24Ghours,GwhatGisGandGisGnotGrequired?G-
GCORRECTGANSWERG-AGsiteGassessmentGisGnotGrequired;GaGsiteGcharacterizationGisGrequired
WhatGisGtheGhistoricalGdateGbeforeGwhichGaGUSTGsystemGmayGhaveGbeenGpermanentlyGclosedGorGabandon
edGthatGECYGmayGrequireGaGsiteGassessment?G-GCORRECTGANSWERG-DecemberG22,G1988
WhenGshouldGaGsiteGsafetyGplanGbeGdeveloped?G-GCORRECTGANSWERG-
PriorGtoGconductingGtheGUSTGsiteGassessment
WhatGisGincludedGunderG"LevelGD"GPPE?G-GCORRECTGANSWERG-
SteelGtoeGboots,GcottonGcoveralls,Ghardhat,GeyeGprotection