Tank Installation & Closure Procedures Flashcards

Before installing a new UST system, what must an owner/operator notify the implementing agency at minimum?

Answer: 30 days before installation begins

EPA regulations require owners/operators to notify the implementing agency at least 30 days prior to installing a new UST system.

Which backfill material is most commonly required around a steel UST tank to prevent corrosion and provide structural support?

Answer: Pea gravel or crushed stone (3/4 inch or less)

Pea gravel or clean crushed stone (3/4 inch or smaller) is the standard backfill because it is non-corrosive, drains well, and provides uniform support around the tank.

What is the minimum depth of cover (burial depth) typically required over the top of a UST tank?

Answer: 24 inches

Most codes and manufacturer specifications require a minimum of 24 inches (2 feet) of cover over the top of the tank to protect it from surface loads and frost.

When installing a fiberglass-reinforced plastic (FRP) UST, which of the following installation requirements is unique compared to steel tanks?

Answer: FRP tanks require anchor straps when high groundwater is anticipated

FRP tanks are buoyant and must be anchored with anchor straps or deadman anchors when high groundwater conditions exist to prevent flotation.

During a UST installation, a vacuum or pressure test is typically conducted to verify what condition?

Answer: Tank structural integrity and tightness

Vacuum or pressure testing of the tank and piping before backfilling confirms structural integrity and that the system has no leaks.

Which document must be obtained and retained before any UST installation project begins, demonstrating the installer's qualifications?

Answer: Certification or licensing as required by the implementing agency

Installers must hold certification or licensing as required by the state implementing agency, and documentation of these qualifications must be retained.

Which of the following piping configurations is required under EPA rules to minimize the risk of product releases from UST piping?

Answer: Pressurized piping must have an automatic line leak detector and shear valves

Pressurized piping systems must include an automatic line leak detector that shuts down the pump and a shear (impact) valve at the dispenser to contain releases.