Underground Storage Tanks (UST) Compliance Flashcards
7 cards from real Environmental Compliance Inspector practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Underground Storage Tanks (UST) Compliance flashcards as text
Which federal act originally established the regulatory authority for the underground storage tank program?
Answer: Resource Conservation and Recovery Act (RCRA), Subtitle I
RCRA Subtitle I, added by the Hazardous and Solid Waste Amendments (HSWA) of 1984, gave EPA the authority to regulate underground storage tanks containing petroleum and hazardous substances.
An environmental compliance inspector finds that a UST site has a groundwater monitoring well showing petroleum contamination. What is the FIRST step the owner/operator must take?
Answer: Report the suspected release to the state implementing agency within the required timeframe
When a suspected release is identified through release detection, the owner/operator must first notify the implementing agency within the timeframe required by regulation before taking most other actions.
What is the maximum volume threshold that distinguishes a farm or residential UST from a regulated commercial UST under federal exemptions?
Answer: 1,100 gallons
Farm and residential tanks with a capacity of 1,100 gallons or less storing motor fuel for non-commercial purposes are exempt from federal UST regulations under 40 CFR Part 280.
Under federal UST regulations, what is the required action if the annual line tightness test detects a leak in the pressurized piping?
Answer: Shut down the system and repair or replace the piping before returning to service
If annual testing reveals a leak in pressurized piping, the system must be taken out of service immediately, and the leaking component must be repaired or replaced before the UST can return to operation.
Which of the following best describes 'secondary containment' in the context of UST compliance?
Answer: A system (such as a double-wall tank or liner) that contains any release from the primary tank before it reaches the environment
Secondary containment is an inner barrier system (e.g., double-wall construction, liner, or vault) designed to intercept and contain any product that escapes the primary tank or piping before it can enter the surrounding soil or groundwater.
When inspecting a UST site, a compliance inspector should verify that overfill prevention equipment is installed. Which device automatically shuts off product flow when the tank reaches 95% capacity?
Answer: Automatic shutoff device (flapper valve)
An automatic shutoff device (flapper valve) is triggered when the tank reaches 95% capacity, stopping product flow at the delivery nozzle to prevent overfills.
How does a 'statistical inventory reconciliation' (SIR) method work as a release detection tool for USTs?
Answer: It uses statistical analysis of inventory data over time to identify patterns consistent with a leak
SIR applies statistical algorithms to inventory data collected over multiple delivery cycles to distinguish normal measurement variation from patterns that indicate an actual leak.