Stage I & II Testing

Gasoline Dispensing Facilities


Gasoline belongs to a category of chemicals known as volatile organic compounds (VOC), which are the main precursor of ozone formation. As part of a strategy to reduce ground level ozone, Stage I & II  permits may be necessary in your area.


Wholesale, retail, and commercial distribution points for gasoline are required to have Stage I and systems to reduce VOC’s released into the surrounding environment by 95%.


When a tanker truck delivers gasoline to a station, the new fuel entering the underground tank forces accumulated gasoline vapors out of the tank into the air. With a properly-functioning Stage I vapor recovery system, these vapors are returned to the tanker truck through a vapor recovery line, instead of into the air.


Stage II vapor recovery systems recover vapors that would escape while refueling a vehicle at the pump. Specially-designed nozzles and hoses prevent the escape of vapors as gasoline is pumped into the vehicle by returning vapors to the underground storage tank or an incinerator.


For more information, on stage I and Stage II Testing, contact us at 800-533-8265 or use our Contact Us Form

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