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
