WA UST SITE ASSESSOR EXAM QUESTIONS AND ANSWERS 2025

WA UST SITE ASSESSOR 2025
EXAM
ANSWER ALL QUESTIONS IN THIS SECTION



QUESTION 1



What is "decommissioning" synonymous with? - ANSWERS-Closure



QUESTION 2



"De minimis concentration" (two definitions) - ANSWERS-less than one inch of
regulated substance, or less than a reportable quantity, as defined under CERCLA



QUESTION 3



CERCLA - ANSWERS-Comprehensive Environmental Response, Compensation,
and Liability Act



QUESTION 4



How long should all written performance claims pertaining to any release detection
system used, and the manner in which these claims have been justified or tested by
the equipment manufacturer or installer, be maintained? - ANSWERS-5 years, or
another reasonable period of time determined by the reg. agency

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, WA UST SITE ASSESSOR 2025
EXAM
QUESTION 5



How long should the results of any sampling, testing, or monitoring be
maintained? - ANSWERS-At least 5 years after servicing work is completed, or
another reasonable period of time determined by the reg. agency



QUESTION 6



How long should written documentation of all calibration maintenance, and repair
of release detection equipment be maintained? - ANSWERS-At least 5 years after
servicing work is completed



QUESTION 7



Is corrosion protection required during temporary tank closure? - ANSWERS-Yes



QUESTION 8



Is release protection required during temporary tank closure? - ANSWERS-No, as
long as the tank is empty




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