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Air to Liquid Ratio Test

A test procedure that measures the volume of the air returned to a storage tank when a specified volume of gasoline is dispensed from a vacuum assist stage II recovery nozzle. The ratio of the volume of air returned to the tank and the volume of gasoline dispensed is a measure of the effectiveness of the vapor-recovery system.

The A/L ratio measured during a test is compared to the specifications for a specific vacuum-assist system to determine if the equipment is operating properly.

See also PEI/RP300