PEI IMA Grade 9 key terms

A liquid-tight barrier, such as a double-wall tank or dike, that holds the contents of the primary tank if it leaks, preventing fuel from reaching soil or groundwater.

The gap between the inner and outer walls of a double-wall tank or piping. Monitoring this space reveals leaks from either wall before product escapes to the environment.

A small reservoir around the fill connection that catches product displaced or spilled during delivery, keeping it out of the containment sump and environment.

A device in the tank fill line that restricts or stops flow when the tank reaches a set level, reducing the risk of overfilling during a delivery.

Equipment that captures gasoline vapors displaced from a vehicle tank during refueling and returns them to the storage tank instead of releasing them to the air.

A Stage II arrangement in which displaced vehicle-tank vapor flows through a coaxial hose and nozzle back into the storage tank as liquid fuel flows out.

The assembly that meters fuel and delivers it to a vehicle, including the pump, meter, hose, nozzle, and safety controls such as breakaway and shear valves.

A valve at the base of a dispenser that closes automatically if the dispenser is struck or displaced, stopping the flow of product from the supply piping.

A fitting in the dispenser hose that separates at a designed force to release the hose without tearing, then seals both ends to limit product release.

The process of adjusting and verifying a dispenser's meter so the volume shown matches the volume delivered within the tolerance allowed by weights and measures rules.

A clearly marked device, usually at the dispenser or a remote station, that immediately stops fuel flow and power to dispensing equipment in an emergency.

A manually operated switch, typically red and mushroom-shaped, that removes power from dispensing equipment when pressed and must be manually reset.

A cabinet or assembly containing motor starters, breakers, and controls for equipment such as submersible pumps, organized into sections and fed from a main disconnect.

An area where flammable vapors, gases, or dusts may be present in quantities that require specially rated electrical equipment to prevent ignition.

The process of dividing a facility into zones or divisions by the likelihood and duration of flammable vapor presence, which determines the electrical equipment permitted there.

A circuit design in which energy is limited so that sparks or heat cannot ignite a flammable atmosphere, allowing safe use in hazardous locations.

A housing built to contain an internal explosion and prevent ignition of surrounding flammable vapor, with joints designed to cool escaping gases.

A system of sensors, monitoring wells, or interstitial monitoring that identifies product loss from tanks or piping and triggers alarms or shutdowns.

A test that pressurizes or measures liquid level in a tank and piping to confirm they hold product without measurable loss over a defined period.

A field test using a calibrated measuring container to compare the volume a dispenser meter registers with the true volume delivered.

A method that applies a small electrical current or sacrificial anodes to buried steel tanks and piping to prevent corrosion by making the metal the cathode.

A metal, usually magnesium or zinc, installed to corrode preferentially and protect buried steel tank or piping from corrosion.

A cathodic protection system that uses an external power source and inert anodes to supply protective current to buried metal structures.

The category assigned to a building based on its use and hazard, which sets requirements for construction, egress, and fire protection systems.

A rated wall, floor, or assembly that resists fire spread for a stated time, separating hazardous areas from occupied spaces or adjoining buildings.

The time in hours that a building assembly maintains its structural integrity and limits heat transfer when tested under a standard fire exposure.

The continuous path from any point in a building to a public way, including exit access, the exit itself, and exit discharge.

The route by which gravity, wind, and seismic forces travel through a structure's members down to the foundation.

The permanent weight of a structure's own materials and fixed equipment, which the structural system must support throughout its life.

The variable weight imposed by occupants, vehicles, stored goods, and movable equipment that a structure must be designed to carry.

A roof structure over dispensing islands that shelters customers and equipment, and must be designed for wind uplift and drainage.

A raised curb or wall around tank or dispensing areas that holds spilled fuel within a bounded area for recovery and cleanup.

A device that removes oil and sediment from runoff before it leaves a site, protecting drainage systems and waterways from fuel contamination.

A written site document describing fuel storage, potential release scenarios, and the equipment and procedures used to prevent and respond to spills.

A written authorization required before welding, cutting, or other spark-producing work near fuel systems, confirming precautions and fire watch are in place.

A person assigned to monitor an area for fire during and after hot work, with the authority and equipment to extinguish or report a fire immediately.

A safety procedure that isolates energy sources and applies locks and tags so equipment cannot be started while maintenance or construction work proceeds.

A drawing updated to show the actual installed conditions of a completed project, used for future maintenance, inspection, and modifications.

A record of outstanding defects or incomplete work identified near project completion that must be corrected before final acceptance.

A pressure test that fills piping or a tank with water to a specified pressure and checks for leaks and pressure loss before the system is placed in service.