WA UST Site Assessor Exam 2024 with complete solution

WA UST Site Assessor Exam 2024 with complete solution What is the hold time for soil and preserved GW GRO samples? ANS-14 days Is an ICC certification needed to install an AST? ANS-No Flammability limits of gasoline ANS-1.4 to 7.6% How many days do you have from a tank closure to report/provide the UST checklist to ECY? ANS-30 days MTCA Method A lead CUL, soil ANS-250 mg/kg MTCA Method A lead CUL, GW ANS-15 ug/L Is the vadose zone saturated or unsaturated? ANS-Unsaturated List in order of most mobile to least mobile: Bunker C, heating oil, diesel, gasoline ANS-Gasoline, diesel, heating oil, Bunker C Is oxygenated gasoline more or less likely to dissolve in water? ANS-More likely; fuel additives like MTBE are more soluble than gasoline Where to sample on dispenser? ANS-2 feet below where the piping enters the UST Where to sample along piping? ANS-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? ANS-3; 1 upgradient, 2 downgradient What vapor is an FID used to measure? ANS-Methane