WA UST Site Assessor Exam 2024/2025 Questions and Correct Answers What is the hold time for soil samples? - Correct Answer 14 days What is the hold time for preserved GW GRO samples? - Correct Answer 14 days What does GRO stand for? - Correct Answer Gasoline Range Organics Is an ICC certification needed to install an AST? - Correct Answer No What does ICC stand for? - Correct Answer International Code Council What is the LFL of Gasoline? - Correct Answer 1.4% What is the UFL of Gasoline? - Correct Answer 7.6% After a tank closure, how many days do you have to report/provide the UST checklist to ECY? - Correct Answer 30 What is ECY an abbreviation for? - Correct Answer The Washington State Department of Ecology What does CUL stand for? - Correct Answer Cleanup Level What is the MTCA Method A lead CUL for soil? - Correct Answer 250 mg/kg What is the MTCA Method A lead CUL for GW? - Correct Answer 15 ug/L What does MTCA stand for? - Correct Answer Model Toxics Control Act 1 / 2
What is the MTCA? - Correct Answer Washington's cleanup act. It governs the cleanup and prevention of contaminated sites that can threaten the health of people and the environment.What is the MTCA Method A GRO (without benzene) CUL for soil? - Correct Answer 100 mg/kg What is the MTCA Method A GRO (with benzene) CUL for soil? - Correct Answer 30 mg/kg What is the MTCA Method A GRO (with benzene) CUL for GW? - Correct Answer 800 ug/L What are MTCA Method A cleanup levels? - Correct Answer The default human health cleanup levels for soil, groundwater, surface water, air, and vapor intrusion.What is the MTCA Method A GRO (without benzene) CUL for GW? - Correct Answer 1,000 ug/L What is the MTCA Method A DRO and ORO CUL for soil? - Correct Answer 2,000 mg/kg What is the MTCA Method A DRO and ORO CUL for GW? - Correct Answer 500 ug/L Is the vadose zone saturated or unsaturated? - Correct Answer Unsaturated List the following from most mobile to least mobile: Diesel, Heating Oil, Bunker C oil, Gasoline - Correct Answer Gasoline, diesel, heating oil, Bunker C oil What is the vadose zone? - Correct Answer The portion of the subsurface above the GW table.Is oxygenated gasoline more or less likely to dissolve in water? - Correct Answer More likely Why is oxygenated gasoline more likely to dissolve in water? - Correct Answer Fuel additives like MTBE are more soluble than gasoline.
- / 2